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6e062e195a8b-0 | An ACM Private CA administrator can share a CA with principals \(users, roles, etc\.\) in another AWS account using any of several methods\. When a share has been received and accepted, the principal can use the CA to issue end\-entity certificates using ACM Private CA or AWS Certificate Manager resources\.
**Important**
Charges associated with a certificate issued in a cross\-account scenario are billed to the AWS account that issues the certificate\.
ACM Private CA administrators can choose among the following methods:
+ Use AWS Resource Access Manager \(RAM\) to share the CA as a resource with a principal in another account or with AWS Organizations\. RAM is a standard method for sharing AWS resources across accounts\. For more information about RAM, see the [AWS RAM User Guide](https://docs.aws.amazon.com/ram/latest/userguide/)\. For more information about AWS Organizations, see the [AWS Organizations User Guide](https://docs.aws.amazon.com/organizations/latest/userguide/)\.
+ Use the ACM Private CA API or CLI to attach a resource\-based policy to a CA, thereby granting access to a principal in another account\. For more information, see [Resource\-Based Policies](pca-rbp.md)\.
The [Enabling Access to a Private CA](granting-ca-access.md) section of this guide provides workflows for granting access to CAs in both single\-account and cross\-account scenarios\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/pca-resource-sharing.md |
717bcbd7b074-0 | The following table describes significant changes to this documentation since January 2018\. In addition to major changes listed here, we also update the documentation frequently to improve the descriptions and examples, and to address the feedback that you send to us\. To be notified about significant changes, use the link in the upper right corner to subscribe to the RSS feed\.
| Change | Description | Date |
| --- |--- |--- |
| [New and updated Java implementation examples](#dochistory) | See [Using the ACM Private CA API \(Java Examples\)](https://docs.aws.amazon.com/acm-pca/latest/userguide/PcaApiIntro.html)\. | September 9, 2020 |
| [New region support](#dochistory) | Endpoints added for Africa \(Cape Town\) and Europe \(Milan\)\. For a complete list of ACM PCA endpoints, see [AWS Certificate Manager Private Certificate Authority Endpoints and Quotas](https://docs.aws.amazon.com/general/latest/gr/acm-pca.html)\. | August 27, 2020 |
| [Cross\-account private CA access supported](#dochistory) | AWS Certificate Manager users can be authorized to issue certificates using private CAs that they do not own\. For more information, see [Cross\-Account Access to Private CAs](https://docs.aws.amazon.com/acm-pca/latest/userguide/pca-resource-sharing.html)\. | August 17, 2020 | | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/dochistory.md |
717bcbd7b074-1 | | [VPC endpoints \(PrivateLink\) support](#dochistory) | Added support for use of VPC endpoints \(AWSPrivateLink\) for enhanced network security\. For more information, see [ACM Private CA VPC Endpoints \(AWS PrivateLink\)](https://docs.aws.amazon.com/acm-pca/latest/userguide/vpc-endpoints.html)\. | March 26, 2020 |
| [Dedicated security section added](#dochistory) | Security documentation for AWS has been consolidated into a dedicated security section\. For information about security, see [Security in AWS Certificate Manager Private Certificate Authority](https://docs.aws.amazon.com/acm-pca/latest/userguide/security.html)\. | March 26, 2020 |
| [Template ARN added to audit reports\.](#dochistory) | For more information, see [Creating an Audit Report for Your Private CA](https://docs.aws.amazon.com/acm-pca/latest/userguide/PcaAuditReport.html)\. | March 6, 2020 |
| [CloudFormation support](#dochistory) | Support added for AWS CloudFormation\. For more information, see [ACMPCA Resource Type Reference](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/AWS_ACMPCA.html) in the AWS CloudFormation User Guide\. | January 22, 2020 | | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/dochistory.md |
717bcbd7b074-2 | | [CloudWatch Events integration](#dochistory) | Integration with CloudWatch Events for asynchronous events, including CA creation, certificate issuance, and CRL creation\. For more information, see [Using CloudWatch Events](https://docs.aws.amazon.com/acm-pca/latest/userguide/CloudWatchEvents.html)\. | December 23, 2019 |
| [FIPS endpoints](#dochistory) | FIPS endpoints added for AWS GovCloud \(US\-East\) and AWS GovCloud \(US\-West\)\. For a complete list of ACM PCA endpoints, see [AWS Certificate Manager Private Certificate Authority Endpoints and Quotas](https://docs.aws.amazon.com/general/latest/gr/acm-pca.html)\. | December 13, 2019 |
| [Tag\-based permissions](#dochistory) | Tag\-based permissions supported using the new APIs `TagResource`, `UntagResource`, and `ListTagsForResource`\. For general information about tag\-based controls, see [Controlling Access to and for IAM Users and Roles Using IAM Resource Tags](https://docs.aws.amazon.com/IAM/latest/UserGuide/access_iam-tags.html)\. | November 5, 2019 | | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/dochistory.md |
717bcbd7b074-3 | | [Name constraints enforcement](#dochistory) | Added support for enforcing subject name constraints on imported CA certificates\. For more information, see [Enforcing Name Constraints on a Private CA](https://docs.aws.amazon.com/acm-pca/latest/userguide/name_constraints.html)\. | October 28, 2019 |
| [New certificate templates](#dochistory) | New certificate templates added, including templates for code signing with AWS Signer\. For more information, see [Using Templates](https://docs.aws.amazon.com/acm-pca/latest/userguide/UsingTemplates.html)\. | October 1, 2019 |
| [Planning your CA](#dochistory) | New section added on planning your PKI using ACM PCA\. For more information, see [Planning Your ACM Private CA Deployment](https://docs.aws.amazon.com/acm-pca/latest/userguide/PcaPlanning.html)\. | September 30, 2019 |
| [Added region support](#dochistory) | Added region support for the AWS Asia Pacific \(Hong Kong\) Region\. For a complete list of supported regions, see [AWS Certificate Manager Private Certificate Authority Endpoints and Quotas](https://docs.aws.amazon.com/general/latest/gr/acm-pca.html)\. | July 24, 2019 |
| [Added complete private CA hierarchy support](#dochistory) | Support for creating and hosting root CAs removes need for an external parent\. | June 20, 2019 | | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/dochistory.md |
717bcbd7b074-4 | | [Added complete private CA hierarchy support](#dochistory) | Support for creating and hosting root CAs removes need for an external parent\. | June 20, 2019 |
| [Added region support](#dochistory) | Added region support for the AWS GovCloud \(US\-West and US\-East\) Regions\. For a complete list of supported regions, see [AWS Certificate Manager Private Certificate Authority Endpoints and Quotas](https://docs.aws.amazon.com/general/latest/gr/acm-pca.html)\. | May 8, 2019 |
| [Added region support](#dochistory) | Added region support for the AWS Asia Pacific \(Mumbai and Seoul\), US West \(N\. California\), and EU \(Paris and Stockholm\) Regions\. For a complete list of supported regions, see [AWS Certificate Manager Private Certificate Authority Endpoints and Quotas](https://docs.aws.amazon.com/general/latest/gr/acm-pca.html)\. | April 4, 2019 |
| [Testing certificate renewal workflow](#dochistory) | Customers can now manually test the configuration of their ACM managed renewal workflow\. For more information, see [Testing ACM's Managed Renewal Configuration](https://docs.aws.amazon.com/acm/latest/userguide/manual-renewal.html)\. | March 14, 2019 | | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/dochistory.md |
717bcbd7b074-5 | | [Added region support](#dochistory) | Added region support for the AWS EU \(London\) Region\. For a complete list of supported regions, see [AWS Certificate Manager Private Certificate Authority Endpoints and Quotas](https://docs.aws.amazon.com/general/latest/gr/acm-pca.html)\. | August 1, 2018 |
| [Restore deleted CAs](#dochistory) | Private CA restore allows customers to restore certificate authorities \(CAs\) for up to 30 days after they have been deleted\. For more information, see [Restoring Your Private CA](https://docs.aws.amazon.com/acm-pca/latest/userguide/PCARestoreCA.html)\. | June 20, 2018 | | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/dochistory.md |
38d738e3bcfe-0 | The following table describes the documentation release history of AWS Certificate Manager Private Certificate Authority before June 2018\.
****
| Change | Description | Date |
| --- | --- | --- |
| New guide | This release introduces AWS Certificate Manager Private Certificate Authority\. | April 04, 2018 | | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/dochistory.md |
e5274c92f091-0 | The following CloudTrail example shows the results of a call to the [ImportCertificateAuthorityCertificate](https://docs.aws.amazon.com/acm-pca/latest/APIReference/API_ImportCertificateAuthorityCertificate.html) operation\.
```
{
"eventVersion":"1.05",
"userIdentity":{
"type":"IAMUser",
"principalId":"account",
"arn":"arn:aws:iam::account:user/name",
"accountId":"account",
"accessKeyId":"Key_ID"
},
"eventTime":"2018-01-26T21:53:28Z",
"eventSource":"acm-pca.amazonaws.com",
"eventName":"ImportCertificateAuthorityCertificate",
"awsRegion":"us-east-1",
"sourceIPAddress":"xx.xx.xx.xx",
"userAgent":"aws-cli/1.14.28 Python/2.7.9 Windows/8 botocore/1.8.32",
"requestParameters":{ | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/CT-ImportCACertificate.md |
e5274c92f091-1 | "requestParameters":{
"certificateAuthorityArn":"arn:aws:acm-pca:region:account:certificate-authority/ac5a7c2e-19c8-4258-b74e-351c2b791fe1",
"certificate":{
"hb":[
45,
45,
...10
],
"offset":0,
"isReadOnly":false,
"bigEndian":true,
"nativeByteOrder":false,
"mark":-1,
"position":1257,
"limit":1257,
"capacity":1257,
"address":0
},
"certificateChain":{
"hb":[
45,
45,
...10
],
"offset":0,
"isReadOnly":false,
"bigEndian":true,
"nativeByteOrder":false,
"mark":-1,
"position":1139,
"limit":1139,
"capacity":1139,
"address":0
}
},
"responseElements":null, | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/CT-ImportCACertificate.md |
e5274c92f091-2 | "address":0
}
},
"responseElements":null,
"requestID":"36bbba0c-2d08-4995-99fc-964926103841",
"eventID":"17a38b26-49c1-41d2-8d15-f9362eeaaaa0",
"eventType":"AwsApiCall",
"recipientAccountId":"account"
}
``` | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/CT-ImportCACertificate.md |
7f5bc9358d9d-0 | The following CloudTrail example shows the results of a call to the [DescribeCertificateAuthority](https://docs.aws.amazon.com/acm-pca/latest/APIReference/API_DescribeCertificateAuthority.html) operation\.
```
{
"eventVersion":"1.05",
"userIdentity":{
"type":"IAMUser",
"principalId":"account",
"arn":"arn:aws:iam::account:user/name",
"accountId":"account>",
"accessKeyId":"Key_ID"
},
"eventTime":"2018-01-26T21:58:18Z",
"eventSource":"acm-pca.amazonaws.com",
"eventName":"DescribeCertificateAuthority",
"awsRegion":"us-east-1",
"sourceIPAddress":"xx.xx.xx.xx",
"userAgent":"aws-cli/1.14.28 Python/2.7.9 Windows/8 botocore/1.8.32",
"requestParameters":{ | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/CT-DescribeCA.md |
7f5bc9358d9d-1 | "requestParameters":{
"certificateAuthorityArn":"arn:aws:acm-pca:region1:account:certificate-authority/ac5a7c2e-19c8-4258-b74e-351c2b791fe1"
},
"responseElements":null,
"requestID":"289d6bd9-cdca-43d1-a446-62e64a7006a4",
"eventID":"ff5f55b7-06de-4cb4-8fa1-5d29d3948f7b",
"eventType":"AwsApiCall",
"recipientAccountId":"account"
}
``` | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/CT-DescribeCA.md |
413c84b100bc-0 | Consult the following topics if you have problems using AWS Certificate Manager Private Certificate Authority\.
**Topics**
+ [Signing a CSR](PcaTsSignCsr.md)
+ [Amazon S3 Blocks CRL Bucket](PcaS3CsrBlock.md)
+ [Deleting a Self\-signed CA Certificate](PcaRevokeSelfSigned.md)
+ [S3 Errors](PCA-TA-S3.md)
+ [Handling Exceptions](PCATsExceptions.md) | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTsIntro.md |
2d80ddb8bd3e-0 | The following terms and concepts can help you as you work with AWS Certificate Manager Private Certificate Authority \(ACM Private CA\)\.
**Topics**
+ [Asymmetric Key Cryptography](#terms-asymmetric)
+ [Basic Constraints Path Length](#terms-pathlength)
+ [Certificate Authority](#terms-ca)
+ [Certificate Authority Certificate](#terms-ca-cert)
+ [CA Depth](#terms-cadepth)
+ [CA Certificate](#terms-cacert)
+ [Certificate Signature](#terms-signing)
+ [Certificate Path](#terms-certpath)
+ [Domain Name System](#terms-dns)
+ [Domain Names](#terms-dn)
+ [End\-Entity Certificate](#terms-endentity)
+ [Private CA](#terms-privateca)
+ [Private Certificate](#terms-pca-cert)
+ [Public Key Infrastructure \(PKI\)](#terms-pki)
+ [Root CA](#terms-rootca)
+ [Root Certificate](#terms-root)
+ [Secure Sockets Layer \(SSL\)](#terms-ssl)
+ [Secure HTTPS](#terms-https)
+ [Self\-signed Certificates](#terms-selfsignedcert) | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
2d80ddb8bd3e-1 | + [Secure HTTPS](#terms-https)
+ [Self\-signed Certificates](#terms-selfsignedcert)
+ [SSL Server Certificates](#terms-sslcert)
+ [Transport Layer Security \(TLS\)](#terms-tls)
+ [Trust](#terms-trust)
+ [X\.500 Distinguished Name](#terms-x500dn) | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
efbfa38445dd-0 | Asymmetric cryptography uses different but mathematically related keys to encrypt and decrypt content\. One of the keys is public and is made available in an X\.509 v3 certificate\. The other key is private and is stored securely\. The X\.509 certificate binds the identity of a user, computer, or other resource \(the certificate subject\) to the public key\.
Private CA certificates and certificates issued by a private CA are X\.509 SSL/TLS certificates\. They bind the identity of a user, service, application, computer, or other device with the public key that's embedded in the certificate\. The associated private key is securely stored by AWS\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
3213d44c7483-0 | The basic constraints path length is a certificate extension for CA certificates that defines the maximum [CA Depth](#terms-cadepth) of the CA hierarchy that exists under a CA\. For example, a CA with a path length constraint of zero cannot have any subordinate CAs\. A CA with a path length constraint of one may have up to one level of subordinate CAs underneath it\. RFC 5280 defines this as, “the maximum number of non\-self\-issued intermediate certificates | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
3213d44c7483-1 | “the maximum number of non\-self\-issued intermediate certificates that may follow this certificate in a valid certification path\." | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
3a6cc6299400-0 | A certificate authority \(CA\) issues and if necessary revokes digital certificates\. The most common type of certificate is based on the ISO X\.509 standard\. An X\.509 certificate affirms the identity of the certificate subject and binds that identity to a public key\. The subject can be a user, an application, a computer, or other device\. The CA signs a certificate by hashing the contents and then encrypting the hash with the private key related to the public key in the certificate\. A client application such as a web browser that needs to affirm the identity of a subject uses the public key to decrypt the certificate signature\. It then hashes the certificate contents and compares the hashed value to the decrypted signature to determine whether they match\. For information about key pairs, see [Asymmetric Key Cryptography](#terms-asymmetric)\. For information about certificate signing, see [Certificate Signature](#terms-signing)\.
You can use ACM Private CA to create a private CA and use the private CA to issue certificates\. Your private CA issues only private SSL/TLS certificates for use within your organization\. For more information, see [Private Certificate](#terms-pca-cert)\. Your private CA also requires a certificate before you can use it\. For more information, see [Certificate Authority Certificate](#terms-ca-cert)\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
1b48cd4558b6-0 | A certificate authority \(CA\) certificate affirms the identity of the CA and binds it to the public key that is contained in the certificate\.
You can use ACM Private CA to create a private root CA or a private subordinate CA, each backed by a CA certificate\. Subordinate CA certificates are signed by another CA certificate higher in a chain of trust\. But in the case of a root CA, the certificate is self\-signed\. You can also establish an external root authority \(hosted on premises, for example\)\. You can then use your root authority to sign a subordinate root CA certificate hosted by ACM Private CA\.
The following example shows the typical fields contained in an ACM Private CA X\.509 CA certificate\. Note that for a CA certificate, the `CA:` value in the `Basic Constraints` field is set to `TRUE`\.
```
Certificate:
Data:
Version: 3 (0x2)
Serial Number: 4121 (0x1019)
Signature Algorithm: sha256WithRSAEncryption
Issuer: C=US, ST=Washington, L=Seattle, O=Example Company Root CA, OU=Corp, CN=www.example.com/[email protected]
Validity
Not Before: Feb 26 20:27:56 2018 GMT
Not After : Feb 24 20:27:56 2028 GMT
Subject: C=US, ST=WA, L=Seattle, O=Examples Company Subordinate CA, OU=Corporate Office, CN=www.example.com
Subject Public Key Info: | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
1b48cd4558b6-1 | Subject Public Key Info:
Public Key Algorithm: rsaEncryption
Public-Key: (2048 bit)
Modulus:
00:c0: ... a3:4a:51
Exponent: 65537 (0x10001)
X509v3 extensions:
X509v3 Subject Key Identifier:
F8:84:EE:37:21:F2:5E:0B:6C:40:C2:9D:C6:FE:7E:49:53:67:34:D9
X509v3 Authority Key Identifier:
keyid:0D:CE:76:F2:E3:3B:93:2D:36:05:41:41:16:36:C8:82:BC:CB:F8:A0
X509v3 Basic Constraints: critical
CA:TRUE
X509v3 Key Usage: critical
Digital Signature, CRL Sign
Signature Algorithm: sha256WithRSAEncryption
6:bb:94: ... 80:d8
``` | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
47ff166a2622-0 | The number of certificates in a CA hierarchy starts with the root CA and traverses to subordinate CAs\. The root counts as one and an additional certificate is counted for each step from a parent CA to a child at each level\. For example, a trust chain with only a root CA and an end\-entity certificate issued directly from the root has a depth \(path length\) of two\. Each subordinate CA in the trust chain increases the | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
47ff166a2622-1 | subordinate CA in the trust chain increases the depth by one\. A root CA with one subordinate CA and an end\-entity certificate has a depth of three\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
e89079dea6c8-0 | Identifies a certificate authority\. CA certificates must include a special extensions known as a basic constraint flag\. This flag must be set to true to allow the certificate to be used to issue certificates\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
e171f49f2432-0 | A digital signature is an encrypted hash over a certificate\. A signature is used to affirm the integrity of the certificate data\. Your private CA creates a signature by using a cryptographic hash function such as SHA256 over the variable\-sized certificate content\. This hash function produces an effectively unforgeable fixed\-size data string\. This string is called a hash\. The CA then encrypts the hash value with its private key and concatenates the encrypted hash with the certificate\.
To validate a signed certificate, a client application uses the CA public key to decrypt the signature\. The client then uses the same signing algorithm that the CA used to compute a hash over the rest of the certificate\. Note that the signing algorithm used by the CA is listed in the certificate\. If the computed hash value is the same as the decrypted hash value, the certificate has not been tampered with\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
1902f1163d25-0 | A client that relies on a certificate validates that a path exists from the end\-entity certificate to a trusted root\. The client checks that each certificate along the path is valid \(not revoked\)\. It also checks that the certificate has not expired, has integrity \(has not been tampered with or modified\), and that constraints in the certificate are enforced\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
b1817ac5ab02-0 | The Domain Name System \(DNS\) is a hierarchical distributed naming system for computers and other resources connected to the internet or a private network\. DNS is primarily used to translate textual domain names, such as `aws.amazon.com`, into numerical IP \(internet protocol\) addresses of the form `192.0.2.0`\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
93303ca33635-0 | A domain name is a text string such as `www.example.com` that can be translated by the Domain Name System \(DNS\) into an IP address\. Computer networks, including the internet, use IP addresses rather than text names\. A domain name consists of distinct labels separated by periods\.
**TLD**
The rightmost label is called the top\-level domain \(TLD\)\. Common examples include `.com`, `.net`, and `.edu`\. Also, the TLD for entities registered in some countries is an abbreviation of the country name and is called a country code\. Examples include `.uk` for the United Kingdom, `.ru` for Russia, and `.fr` for France\. When country codes are used, a second\-level hierarchy for the TLD is often introduced to identify the type of the registered entity\. For example, the `.co.uk` TLD identifies commercial enterprises in the United Kingdom\.
**Apex domain**
The apex domain name includes and expands on the top\-level domain\. For domain names that include a country code, the apex domain includes the code and the labels, if any, that identify the type of the registered entity\. The apex domain does not include subdomains \(see the following paragraph\)\. In `www.example.com`, the name of the apex domain is `example.com`\. In `www.example.co.uk`, the name of the apex domain is `example.co.uk`\. Other names that are often used instead of apex include base, bare, root, root apex, or zone apex\.
**Subdomain** | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
93303ca33635-1 | **Subdomain**
Subdomain names precede the apex domain name and are separated from it and from each other by a period\. The most common subdomain name is `www`, but any name is possible\. Also, subdomain names can have multiple levels\. For example, in `jake.dog.animals.example.com`, the subdomains are `jake`, `dog`, and `animals` in that order\.
**FQDN**
A fully qualified domain name \(FQDN\) is the complete DNS name for a computer, website, or other resource connected to a network or to the internet\. For example `aws.amazon.com` is the FQDN for Amazon Web Services\. An FQDN includes all domains up to the top\-level domain\. For example, `[subdomain1].[subdomain2]...[subdomainn].[apex domain].[top–level domain]` represents the general format of an FQDN\.
**PQDN**
A domain name that is not fully qualified is called a partially qualified domain name \(PQDN\) and is ambiguous\. A name such as `[subdomain1.subdomain2.]` is a PQDN because the root domain cannot be determined\.
**Registration** | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
93303ca33635-2 | **Registration**
The right to use a domain name is delegated by domain name registrars\. Registrars are typically accredited by the Internet Corporation for Assigned Names and Numbers \(ICANN\)\. In addition, other organizations called registries maintain the TLD databases\. When you request a domain name, the registrar sends your information to the appropriate TLD registry\. The registry assigns a domain name, updates the TLD database, and publishes your information to WHOIS\. Typically, domain names must be purchased\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
a18fe5558087-0 | An end\-entity certificate identifies a resource, such as a server, instance, container or device\. Unlike CA certificates, end\-entity certificates cannot be used to issue certificates\. Other common terms for end\-entity certificate are "client" or "subscriber" certificate\. We use the term end\-entity certificate in the ACM Private CA documentation\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
9de3e0fd8a85-0 | Creates \(issues\) certificates for use within a private network or within an organization \(that is, not the public internet\)\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
d06de3637e5d-0 | ACM Private CA certificates are private SSL/TLS certificates that you can use within your organization\. Use them to identify resources such as clients, servers, applications, services, devices, and users\. When establishing a secure encrypted communications channel, each resource uses a certificate like the following as well as cryptographic techniques to prove its identity to another resource\. Internal API endpoints, web servers, VPN users, IoT devices, and many other applications use private certificates to establish encrypted communication channels that are necessary for their secure operation\. By default, private certificates are not publicly trusted\. An internal administrator must explicitly configure applications to trust private certificates and distribute the certificates\.
```
Certificate:
Data:
Version: 3 (0x2)
Serial Number:
e8:cb:d2:be:db:12:23:29:f9:77:06:bc:fe:c9:90:f8
Signature Algorithm: sha256WithRSAEncryption
Issuer: C=US, ST=WA, L=Seattle, O=Example Company CA, OU=Corporate, CN=www.example.com
Validity
Not Before: Feb 26 18:39:57 2018 GMT
Not After : Feb 26 19:39:57 2019 GMT
Subject: C=US, ST=Washington, L=Seattle, O=Example Company, OU=Sales, CN=www.example.com/[email protected]
Subject Public Key Info:
Public Key Algorithm: rsaEncryption
Public-Key: (2048 bit) | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
d06de3637e5d-1 | Subject Public Key Info:
Public Key Algorithm: rsaEncryption
Public-Key: (2048 bit)
Modulus:
00...c7
Exponent: 65537 (0x10001)
X509v3 extensions:
X509v3 Basic Constraints:
CA:FALSE
X509v3 Authority Key Identifier:
keyid:AA:6E:C1:8A:EC:2F:8F:21:BC:BE:80:3D:C5:65:93:79:99:E7:71:65
X509v3 Subject Key Identifier:
C6:6B:3C:6F:0A:49:9E:CC:4B:80:B2:8A:AB:81:22:AB:89:A8:DA:19
X509v3 Key Usage: critical
Digital Signature, Key Encipherment
X509v3 Extended Key Usage:
TLS Web Server Authentication, TLS Web Client Authentication
X509v3 CRL Distribution Points:
Full Name:
URI:http://NA/crl/12345678-1234-1234-1234-123456789012.crl
Signature Algorithm: sha256WithRSAEncryption
58:32:...:53
``` | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
631e94626f6b-0 | A public key infrastructure \(PKI\) is a comprehensive system that enables the creation, issuance, management, distribution, use, storage, and revocation of digital certificates\. A PKI consists of people, hardware, software, policies, documents, and procedures\. In ACM Private CA, the purpose of a PKI is to manage private certificates\. ACM Private CA implements the following:
**Public Key Certificates**
Your private CA issues certificates to affirm the identities of users, services, applications, computers, and other devices within your organization\. For more information, see [Private Certificate](#terms-pca-cert)\.
**Certificate Repository**
Your private CA stores all of the certificates it has issued\. You can, of course, delete a certificate from the ACM Private CA repository\.
**Certificate Revocation**
ACM Private CA supports certificate revocation\. Certificates that can no longer be trusted must be revoked by the certificate authority\. A certificate can be revoked before the end of its validity period for any number of reasons\. Common reasons include key compromise, end of operations, a change in affiliation, or the withdrawal of privilege\. When you create a private CA, you specify whether you want the CA to support certificate revocation\. If the CA supports revocation, you can request an audit report to review certificates that you have revoked\.
**Key Storage**
Your CA private keys are locked away securely in a hardware security module \(HSM\) that is owned and managed by Amazon\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
4198c3566349-0 | A cryptographic building block and root of trust upon which certificates can be issued\. It comprises a private key for signing \(issuing\) certificates and a root certificate that identifies the root CA and binds the private key to the name of the CA\. The root certificate is distributed to the trust stores of each entity in an environment\. Administrators construct trust stores to include only the CAs that they trust\. Administrators update or build the trust stores | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
4198c3566349-1 | trust\. Administrators update or build the trust stores into the operating systems, instances, and host machine images of entities in their environment\. When resources attempt to connect with one another, they check the certificates that each entity presents\. A client checks the certificates for validity and whether a chain exists from the certificate to a root certificate installed in the trust store\. If those conditions are met, a “handshake" is accomplished between the resources\. This handshake | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
4198c3566349-2 | is accomplished between the resources\. This handshake cryptographically proves the identity of each entity to the other and creates an encrypted communication channel \(TLS/SSL\) between them\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
05f895090d97-0 | A certificate authority \(CA\) typically exists within a hierarchical structure that contains multiple other CAs with clearly defined parent–child relationships between them\. Child or subordinate CAs are certified by their parent CAs, creating a certificate chain\. The CA at the top of the hierarchy is referred to as the root CA, and its certificate is called the root certificate\. This certificate is typically self\-signed\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
53bb4584e272-0 | Secure Sockets Layer \(SSL\) and Transport Layer Security \(TLS\) are cryptographic protocols that provide communication security over a computer network\. TLS is the successor of SSL\. They both use X\.509 certificates to authenticate the server\. Both protocols negotiate a symmetric key to encrypt data that flows between the client and server\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
e0447fb55ebe-0 | HTTPS stands for HTTP over SSL/TLS, a secure form of HTTP that is supported by all major browsers and servers\. All HTTP requests and responses are encrypted before being sent across a network\. HTTPS combines the HTTP protocol with symmetric, asymmetric, and X\.509 certificate\-based cryptographic techniques\. HTTPS works by inserting a cryptographic security layer below the HTTP application layer and above the TCP transport layer in the Open Systems Interconnection \(OSI\) model\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
e0447fb55ebe-1 | the Open Systems Interconnection \(OSI\) model\. The security layer uses the Secure Sockets Layer \(SSL\) protocol or the Transport Layer Security \(TLS\) protocol\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
cdc25d651b01-0 | A certificate signed by the issuer instead of a higher CA\. Unlike certificates issued from a secure root maintained by a CA, self\-signed certificates act as their own root, and as a result they have significant limitations: They can be used to provide on the wire encryption but not to verify identity, and they cannot be revoked\. They are unacceptable from a security perspective\. But organizations use them nonetheless because they are easy to generate, require no | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
cdc25d651b01-1 | because they are easy to generate, require no expertise or infrastructure, and many applications accept them\. There are no controls in place for issuing self\-signed certificates\. Organizations that use them incur greater risk of outages caused by certificate expirations because they have no way to track expiration dates\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
e8dcace13c2e-0 | HTTPS transactions require server certificates to authenticate a server\. A server certificate is an X\.509 v3 data structure that binds the public key in the certificate to the subject of the certificate\. An SSL/TLS certificate is signed by a certificate authority \(CA\)\. It contains the name of the server, the validity period, the public key, the signature algorithm, and more\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
2f05c7d62b6e-0 | See [Secure Sockets Layer \(SSL\)](#terms-ssl)\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
16457bdb6a74-0 | In order for a web browser to trust the identity of a website, the browser must be able to verify the website's certificate\. Browsers, however, trust only a small number of certificates known as CA root certificates\. A trusted third party, known as a certificate authority \(CA\), validates the identity of the website and issues a signed digital certificate to the website's operator\. The browser can then check the digital signature to validate the identity of | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
16457bdb6a74-1 | the digital signature to validate the identity of the website\. If validation is successful, the browser displays a lock icon in the address bar\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
5a2a21e7948c-0 | X\.500 distinguished names \(DN\) are used to identify users, computers, applications, services, servers, and other devices in the X\.509 public key certificates that ACM Private CA creates\. This includes private certificates and private CA certificates\. Common fields include the following:
+ **organizationName \(O\)** – Name of the organization that issued or is the subject of a certificate
+ **organiztionUnit \(OU\)** – Department or division within an organization
+ **country \(C\)** – Two letter country code
+ **stateName \(S\)** – Name of a state or province such as Kansas
+ **localityName \(L\)** – Locality name such as Seattle
+ **commonName \(CN\)** – Common name of the certificate subject or issuer | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaTerms.md |
da713e301498-0 | ACM Private CA enables creation of private certificate authority \(CA\) hierarchies, including root and subordinate CAs, without the investment and maintenance costs of operating an on\-premises CA\. Your private CAs can issue end\-entity X\.509 certificates useful in scenarios including:
+ Creating encrypted TLS communication channels
+ Authenticating users, computers, API endpoints, and IoT devices
+ Cryptographically signing code
+ Implementing Online Certificate Status Protocol \(OCSP\) for obtaining certificate revocation status
ACM Private CA operations can be accessed from the AWS Management Console, using the ACM Private CA API, or using the AWS CLI\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaWelcome.md |
46d3f6e83ea6-0 | There are two AWS services for issuing and deploying X\.509 certificates\. Choose the one that best fits your needs\. Considerations include whether you need public\- or private\-facing certificates, customized certificates, certificates you want to deploy into other AWS services, or automated certificate management and renewal\.
1. **ACM Private CA**—This service is for enterprise customers building a public key infrastructure \(PKI\) inside the AWS cloud and intended for private use within an organization\. With ACM Private CA, you can create your own CA hierarchy and issue certificates with it for authenticating internal users, computers, applications, services, servers, and other devices, and for signing computer code\. Certificates issued by a private CA are trusted only within your organization, not on the internet\.
After creating a private CA, you have the ability to issue certificates directly \(that is, without obtaining validation from a third\-party CA\) and to customize them to meet your organization's internal needs\. For example, you may want to:
+ Create certificates with any subject name\.
+ Create certificates with any expiration date\.
+ Use any supported private key algorithm and key length\.
+ Use any supported signing algorithm\.
+ Control certificate issuance using templates\.
*You are in the right place for this service\.* To get started, sign into the [https://console\.aws\.amazon\.com/acm\-pca/](https://console.aws.amazon.com/acm-pca/) console\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaWelcome.md |
46d3f6e83ea6-1 | 1. **AWS Certificate Manager \(ACM\)**—This service manages certificates for enterprise customers who need a publicly trusted secure web presence using TLS\. You can deploy ACM certificates into AWS Elastic Load Balancing, Amazon CloudFront, Amazon API Gateway, and other [integrated services](https://docs.aws.amazon.com/acm/latest/userguide/acm-services.html)\. The most common application of this kind is a secure public website with significant traffic requirements\.
With this service, you can use public [certificates provided by ACM](https://docs.aws.amazon.com/acm/latest/userguide/gs-acm-request-public.html) \(ACM certificates\) or [ certificates that you import into ACM](https://docs.aws.amazon.com/acm/latest/userguide/import-certificate.html)\. If you use ACM Private CA to create a CA, ACM can manage certificate issuance from that private CA and automate certificate renewals\.
For more information, see the [AWS Certificate Manager User Guide](https://docs.aws.amazon.com/acm/latest/userguide/acm-overview.html)\.
**Topics**
[Regions](PcaRegions.md)
[Integrated Services](PcaIntegratedServices.md)
[Quotas](PcaLimits.md)
[RFC Compliance](RFC-compliance.md)
[Pricing](PcaPricing.md) | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaWelcome.md |
0a5c472dcba8-0 | This section describes how you create a private certificate authority \(CA\) with an optional certificate revocation list \(CRL\) using ACM Private CA\. You can use these procedures to create both root CAs and subordinate CAs, resulting in an auditable hierarchy of trust relationships that matches your organizational needs\.
For information about using a CA to sign end\-entity certificates for your users, devices, and applications, see [Issuing a Private End\-Entity Certificate](PcaIssueCert.md)\.
**Note**
Your account is charged a monthly price for each private CA starting from the time that you create it\.
**Topics**
+ [Access Policies for CRLs in Amazon S3](#s3-policies)
+ [CRL Structure](#crl-structure)
+ [Procedures for Creating a CA](#CA-procedures) | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaCreateCa.md |
1a5355d03b35-0 | If you plan to create a CRL, you need to prepare an Amazon S3 bucket to store it in\. ACM Private CA automatically deposits the CRL in the Amazon S3 bucket you designate and updates it periodically\. For more information, see [How Do I Create an S3 bucket?](https://docs.aws.amazon.com/AmazonS3/latest/user-guide/create-bucket.html)
Your S3 bucket must be secured by an attached permissions policy\. The policy protects the contents of the bucket from being accessed by unauthorized users or service principals\. During the console procedure for creating a CA, you can let ACM Private CA create a new bucket and apply a policy automatically, or you can use a bucket that you have previously set up yourself\. In that case, or when you create a CA using the AWS CLI, you must attach a policy manually\. For more information, see [How Do I Add an S3 Bucket Policy?](https://docs.aws.amazon.com/AmazonS3/latest/user-guide/add-bucket-policy.html)
We offer two example policies for securing Amazon S3 buckets\.
<a name="policy1"></a>
**Policy 1 \(Restrictive\)**
This policy grants restricted permissions on the S3 bucket to the ACM Private CA service principal\. This example restricts by both AWS account and by the ARN of a private CA, but it could also be configured to restrict just one or the other\. The `Put` permission allows ACM Private CA to place objects in the bucket\. The `Get` permission allows objects in the bucket to be retrieved\.
``` | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaCreateCa.md |
1a5355d03b35-1 | ```
{
"Version":"2012-10-17",
"Statement":[
{
"Effect":"Allow",
"Principal":{
"Service":"acm-pca.amazonaws.com"
},
"Action":[
"s3:PutObject",
"s3:PutObjectAcl",
"s3:GetBucketAcl",
"s3:GetBucketLocation"
],
"Resource":[
"arn:aws:s3:::bucket-name/*",
"arn:aws:s3:::bucket-name"
],
"Condition":{
"StringEquals":{
"aws:SourceAccount":"account",
"aws:SourceArn":"arn:partition:acm-pca:region:account:certificate-authority/11111111-2222-3333-4444-555555555555"
}
}
}
]
}
```
<a name="policy2"></a>
**Policy 2 \(Permissive\)** | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaCreateCa.md |
1a5355d03b35-2 | ```
<a name="policy2"></a>
**Policy 2 \(Permissive\)**
This policy grants `Put` and `Get` permissions on the S3 bucket to the ACM Private CA service principal without restricting access by CA or user\. The `Put` permission allows ACM Private CA to place objects in the bucket\. The `Get` permission allows objects in the bucket to be retrieved\. A permissive policy is appropriate if you want the bucket to be available for multiple CAs or multiple users\.
```
{
"Version":"2012-10-17",
"Statement":[
{
"Effect":"Allow",
"Principal":{
"Service":"acm-pca.amazonaws.com"
},
"Action":[
"s3:PutObject",
"s3:PutObjectAcl",
"s3:GetBucketAcl",
"s3:GetBucketLocation"
],
"Resource":[
"arn:aws:s3:::bucket-name/*",
"arn:aws:s3:::bucket-name"
]
}
]
}
``` | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaCreateCa.md |
fdd89fda5ea5-0 | Each CRL is a DER encoded file\. To download the file and use OpenSSL to view it, use a command like to the following:
```
openssl crl -inform DER -in path-to-crl-file -text -noout
```
CRLs have the following format:
```
Certificate Revocation List (CRL):
Version 2 (0x1)
Signature Algorithm: sha256WithRSAEncryption
Issuer: /C=US/ST=WA/L=Seattle/O=Example Company CA/OU=Corporate/CN=www.example.com
Last Update: Feb 26 19:28:25 2018 GMT
Next Update: Feb 26 20:28:25 2019 GMT
CRL extensions:
X509v3 Authority Key Identifier:
keyid:AA:6E:C1:8A:EC:2F:8F:21:BC:BE:80:3D:C5:65:93:79:99:E7:71:65
X509v3 CRL Number:
1519676905984
Revoked Certificates:
Serial Number: E8CBD2BEDB122329F97706BCFEC990F8
Revocation Date: Feb 26 20:00:36 2018 GMT
CRL entry extensions:
X509v3 CRL Reason Code:
Key Compromise | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaCreateCa.md |
fdd89fda5ea5-1 | CRL entry extensions:
X509v3 CRL Reason Code:
Key Compromise
Serial Number: F7D7A3FD88B82C6776483467BBF0B38C
Revocation Date: Jan 30 21:21:31 2018 GMT
CRL entry extensions:
X509v3 CRL Reason Code:
Key Compromise
Signature Algorithm: sha256WithRSAEncryption
82:9a:40:76:86:a5:f5:4e:1e:43:e2:ea:83:ac:89:07:49:bf:
c2:fd:45:7d:15:d0:76:fe:64:ce:7b:3d:bb:4c:a0:6c:4b:4f:
9e:1d:27:f8:69:5e:d1:93:5b:95:da:78:50:6d:a8:59:bb:6f:
49:9b:04:fa:38:f2:fc:4c:0d:97:ac:02:51:26:7d:3e:fe:a6:
c6:83:34:b4:84:0b:5d:b1:c4:25:2f:66:0a:2e:30:f6:52:88: | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaCreateCa.md |
fdd89fda5ea5-2 | e8:d2:05:78:84:09:01:e8:9d:c2:9e:b5:83:bd:8a:3a:e4:94:
62:ed:92:e0:be:ea:d2:59:5b:c7:c3:61:35:dc:a9:98:9d:80:
1c:2a:f7:23:9b:fe:ad:6f:16:7e:22:09:9a:79:8f:44:69:89:
2a:78:ae:92:a4:32:46:8d:76:ee:68:25:63:5c:bd:41:a5:5a:
57:18:d7:71:35:85:5c:cd:20:28:c6:d5:59:88:47:c9:36:44:
53:55:28:4d:6b:f8:6a:00:eb:b4:62:de:15:56:c8:9c:45:d7:
83:83:07:21:84:b4:eb:0b:23:f2:61:dd:95:03:02:df:0d:0f:
97:32:e0:9d:38:de:7c:15:e4:36:66:7a:18:da:ce:a3:34:94: | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaCreateCa.md |
fdd89fda5ea5-3 | 58:a6:5d:5c:04:90:35:f1:8b:55:a9:3c:dd:72:a2:d7:5f:73:
5a:2c:88:85
```
**Note**
The CRL will only be deposited in Amazon S3 once a certificate has been issued that refers to it\. Prior to that, there will only be an `acm-pca-permission-test-key` file visible in the Amazon S3 bucket\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaCreateCa.md |
190e00983b1e-0 | You can create a CA using the AWS console, the ACM Private CA portion of the AWS CLI, or AWS CloudFormation\.
**To create a private CA using the AWS console**
1. Sign in to your AWS account and open the ACM Private CA console at **[https://console\.aws\.amazon\.com/acm\-pca/home](https://console.aws.amazon.com/acm-pca/home)**\. The introductory page will appear if your console opens to a region in which you do not have a CA\. Choose **Get started** beneath **Private certificate authority**\. Choose **Get started** again\. If the console opens to a region in which you already have one or more CAs, the introductory page will not be shown\. Choose **Private CAs** and then choose **Create CA**\.
1. <a name="PcaCreateCaType"></a>On the **Select the certificate authority \(CA\) type** page, select the type of the private certificate authority that you want to create\.
+ Choosing **Root CA** establishes a new CA hierarchy\. This CA is backed by a self\-signed certificate\. It serves as the ultimate signing authority for other CAs and end\-entity certificates in the hierarchy\.
+ Choosing **Subordinate CA** creates a CA that must be signed by a parent CA above it in the hierarchy\. Subordinate CAs are typically be used to create other subordinate CAs or to issue end\-entity certificates to users, computers, and applications\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaCreateCa.md |
190e00983b1e-1 | After selecting a CA type, choose **Next**\.
1. <a name="PcaCreateCaName"></a>On the **Configure the certificate authority \(CA\) subject name**, configure the subject name of your private CA\. You must enter at least one of the following values:
+ **Organization \(O\)**
+ **Organization Unit \(OU\)**
+ **Country name \(C\)**
+ **State or province name**
+ **Locality name**
+ **Common Name \(CN\)**
Because the backing certificate is self\-signed, the subject information you provide for a private CA is probably sparser than what a public CA would contain\. For more information about each of the values that make up a subject distinguished name, see [X\.500 Distinguished Name](PcaTerms.md#terms-x500dn)\.
When done, choose **Next**\.
1. <a name="PcaCreateKeyAlg"></a>On the **Configure the certificate authority \(CA\) key type** page, select the key algorithm and the bit\-size of the key\. The default value is an RSA algorithm with a 2048\-bit key length\. If you expand the **Advanced** options, you can select from the following algorithms:
+ RSA 2048
+ RSA 4096
+ ECDSA P256 | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaCreateCa.md |
190e00983b1e-2 | + RSA 2048
+ RSA 4096
+ ECDSA P256
+ ECDSA P384
Make a selection and then choose **Next**\.
1. <a name="PcaCreateCRL"></a>On the **Configure certificate revocation** page, you have the option of creating a certificate revocation list \(CRL\) managed by ACM Private CA\. Clients such as web browsers query CRLs to determine whether an end\-entity or subordinate CA certificate can be trusted\. For more information, see [Revoking a Private Certificate](PcaRevokeCert.md)\.
When you have associated a CRL with a CA, ACM Private CA includes the CRL Distribution Points extension in certificates issued by the CA\. This extension provides the URL to the CRL so that client devices can check certificate revocation status\.
To create a CRL, complete the following steps:
1. Choose **Enable CRL distribution**\.
1. To create a new Amazon S3 bucket for your CRL entries, choose **Yes** for the **Create a new S3 bucket** option and type a unique bucket name\. \(You do not need to include the path to the bucket\.\) Otherwise, choose **No** and select an existing bucket from the list\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaCreateCa.md |
190e00983b1e-3 | If you choose **Yes**, ACM Private CA creates and attaches the necessary policy to your bucket\. If you choose **No**, you must attach a policy to your bucket before you can begin generating CRLs\. Use one of the policy patterns described in [Access Policies for CRLs in Amazon S3 ](#s3-policies)\. For information about attaching a policy, see [How Do I Add an S3 Bucket Policy?](https://docs.aws.amazon.com/AmazonS3/latest/user-guide/add-bucket-policy.html)
**Note**
Your private CA may fail to create a CRL bucket if Amazon S3 **block public access** settings are enforced on your account\. Check your Amazon S3 settings if this occurs\. For more information, see [Using Amazon S3 Block Public Access](Amazon Simple Storage Service Developer Guideaccess-control-block-public-access.html)\.
1. Expand **Advanced** for additional configuration options\.
+ Add a **Custom CRL Name** to create an alias for your Amazon S3 bucket\. This name is contained in certificates issued by the CA in the “CRL Distribution Points" extension that is defined by RFC 5280\.
+ Type the number of days your CRL will remain valid\. The default value is 7 days\. For online CRLs, a validity period of two to seven days is common\. ACM Private CA tries to regenerate the CRL at the midpoint of the specified period\.
Choose **Next**\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaCreateCa.md |
190e00983b1e-4 | Choose **Next**\.
1. On the **Add tags** page, you can optionally tag your CA\. Tags are key/value pairs that serve as metadata for identifying and organizing AWS resources\. For a list of ACM Private CA tag parameters and for instructions on how to add tags to CAs after creation, see [Add Tags to your Private Certificate Authority](PCAUpdateCA.md#PcaCaTagging)\.
Choose **Next**\.
1. <a name="configure-acm-renewal"></a>**Configure CA permissions**
Optionally delegate automatic renewal permissions to the ACM service principal\. ACM can only automatically renew private end\-entity certificates generated by this CA if this permission is granted\. You can assign renewal permissions at any time with the ACM Private CA [CreatePermission](https://docs.aws.amazon.com/acm-pca/latest/APIReference/API_CreatePermission.html) API or [create\-permission](https://docs.aws.amazon.com/cli/latest/reference/acm-pca/create-permission.html) CLI command\.
The default is to enable these permissions\.
Choose **Next**\.
1. On the **Review and create** page, confirm that your configuration is correct, check the box to acknowledge pricing information, and choose **Confirm and create**\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaCreateCa.md |
190e00983b1e-5 | If you want to continue on to creating and installing a CA certificate, choose **Get started** in the **Success** dialog box and follow the instructions at [Creating and Installing the Certificate for a Private CA](PCACertInstall.md)\. Otherwise choose **You can also finish this later**, which takes you to a list of your **Private CAs**\.
**To create a private CA using the AWS CLI**
Use the [create\-certificate\-authority](https://docs.aws.amazon.com/cli/latest/reference/acm-pca/create-certificate-authority.html) command to create a private CA\. You must specify the CA configuration, the revocation configuration if you plan to use a CRL, and the CA type\. This information is contained in two files that you supply as arguments to the command\. Optionally, you can also supply tags and an idempotency token\.
If you are configuring a CRL, you must have a secured Amazon S3 bucket in place *before* you issue the create\-certificate\-authority command\. For more information, see [Access Policies for CRLs in Amazon S3 ](#s3-policies)\.
The CA configuration file specifies the following information:
+ The name of the algorithm
+ The key size to be used to create the CA private key
+ The type of signing algorithm that the CA uses to sign
+ X\.500 subject information
The CRL configuration file specifies the following information:
+ The CRL expiration period in days \(the validity period of the CRL\) | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaCreateCa.md |
190e00983b1e-6 | The CRL configuration file specifies the following information:
+ The CRL expiration period in days \(the validity period of the CRL\)
+ The Amazon S3 bucket that will contain the CRL
+ A CNAME alias for the S3 bucket that is included in certificates issued by the CA
Modify as needed the see example files to use with the command\.
**File: C:\\ca\_config\.txt**
```
{
"KeyAlgorithm":"RSA_2048",
"SigningAlgorithm":"SHA256WITHRSA",
"Subject":{
"Country":"US",
"Organization":"Example Corp",
"OrganizationalUnit":"Sales",
"State":"WA",
"Locality":"Seattle",
"CommonName":"www.example.com"
}
}
```
**File: C:\\revoke\_config\.txt**
```
{
"CrlConfiguration":{
"Enabled":true,
"ExpirationInDays":7,
"CustomCname":"some_name.crl",
"S3BucketName":"your-bucket-name"
}
} | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaCreateCa.md |
190e00983b1e-7 | "S3BucketName":"your-bucket-name"
}
}
```
**Command:**
```
aws acm-pca create-certificate-authority \
--certificate-authority-configuration file://C:\ca_config.txt \
--revocation-configuration file://C:\revoke_config.txt \
--certificate-authority-type "ROOT" \
--idempotency-token 98256344 \
--tags Key=Name,Value=MyPCA
```
If successful, this command outputs the ARN \(Amazon Resource Name\) of the CA\.
```
{
"CertificateAuthorityArn":"arn:aws:acm-pca:region:account:
certificate-authority/12345678-1234-1234-123456789012"
}
```
**To create a private CA using AWS CloudFormation**
For information about creating a private CA using AWS CloudFormation, see [ACM PCA Resource Type Reference](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/AWS_ACMPCA.html) in the *AWS CloudFormation User Guide*\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaCreateCa.md |
d194959e272b-0 | You can optionally configure encryption on the Amazon S3 bucket containing your CRLs\. ACM Private CA supports two encryption modes for assets in S3:
+ Automatic server\-side encryption with Amazon S3\-managed AES\-256 keys\.
+ Customer\-managed encryption using AWS Key Management Service and customer master keys \(CMKs\) configured to your specifications\.
**Note**
ACM Private CA does not support using default CMKs generated automatically by S3\.
The following procedures describe how to set up each of the encryption options\.
**To configure automatic encryption**
Complete the following steps to enable S3 server\-side encryption\.
1. Open the Amazon S3 console at [https://console\.aws\.amazon\.com/s3/](https://console.aws.amazon.com/s3/)\.
1. In the **Buckets** table, choose the bucket that will hold your ACM Private CA assets\.
1. On the page for your bucket, choose the **Properties** tab\.
1. Choose the **Default encryption** card\.
1. Choose **AES\-256**\.
1. Optionally view the bucket permissions policy, then choose **Save**\.
**To configure custom encryption**
Complete the following steps to enable encryption using a custom CMK\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaCreateCa.md |
d194959e272b-1 | **To configure custom encryption**
Complete the following steps to enable encryption using a custom CMK\.
1. \(Optional\) If you do not have an AWS KMS CMK already, create one using the following AWS CLI [create\-key](https://docs.aws.amazon.com/cli/latest/reference/kms/create-key.html) command:
```
aws kms create-key
```
The output contains the key ID and Amazon Resource Name \(ARN\) of the CMK\. The following is example output:
```
{
"KeyMetadata": {
"KeyId": "6f815f63-e628-448c-8251-e40cb0d29f59",
"Description": "",
"Enabled": true,
"KeyUsage": "ENCRYPT_DECRYPT",
"KeyState": "Enabled",
"CreationDate": 1478910250.94,
"Arn": "arn:aws:kms:us-west-2:123456789012:key/6f815f63-e628-448c-8251-e40cb0d29f59",
"AWSAccountId": "123456789012"
}
}
``` | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaCreateCa.md |
d194959e272b-2 | "AWSAccountId": "123456789012"
}
}
```
1. Using the following steps, you give the ACM Private CA service principal permission to use the CMK\. By default, all AWS KMS CMKs are private; only the resource owner can use a CMK to encrypt and decrypt data\. However, the resource owner can grant permissions to access the CMK to other users and resources\. The service principal must be in the same region as where the CMK is stored\.
1. First, save the default policy for your CMK as `policy.json` using the following [get\-key\-policy](https://docs.aws.amazon.com/cli/latest/reference/kms/get-key-policy.html) command:
```
aws kms get-key-policy --key-id key-id --policy-name default --output text > ./policy.json
```
1. Open the `policy.json` file in a text editor and add the following statement:
```
{
"Sid":"Allow ACM-PCA use of the key",
"Effect":"Allow",
"Principal":{
"Service":"acm-pca.amazonaws.com"
},
"Action":[
"kms:GenerateDataKey",
"kms:Decrypt" | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaCreateCa.md |
d194959e272b-3 | },
"Action":[
"kms:GenerateDataKey",
"kms:Decrypt"
],
"Resource":"*",
"Condition":{
"StringLike":{
"kms:EncryptionContext:aws:s3:arn":[
"arn:aws:s3:::bucket_name/acm-pca-permission-test-key",
"arn:aws:s3:::bucket_name/acm-pca-permission-test-key-private",
"arn:aws:s3:::bucket_name/audit-report/*",
"arn:aws:s3:::bucket_name/crl/*"
]
}
}
}
```
1. Finally, add the updated policy using the following [put\-key\-policy](https://docs.aws.amazon.com/cli/latest/reference/kms/put-key-policy.html) command:
```
aws kms put-key-policy --key-id key-id --policy-name default --policy file://policy.json
``` | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/PcaCreateCa.md |
fa19bd3b272f-0 | ACM Private CA uses templates to create both CA certificates and end\-entity certificates that identify users, hosts, resources, and devices\. When you create a certificate in the console, a template is applied automatically\. Template options are based on the type of certificate that you have chosen and the path\-length that you specify\. If you use the CLI or API to create a certificate, you manually provide the ARN of the template that you want to apply\. \(The `EndEntityCertificate/V1` template is applied if you provide no ARN\.\)
**Note**
Cross\-account certificate issuers are constrained by a [resource\-based policy](pca-rbp.md) and have access only to the `EndEntityCertificate/V1` template\.
The following links provide information about creating a certificate with ACM Private CA\.
+ Using the command line: [issue\-certificate](https://docs.aws.amazon.com/cli/latest/reference/acm-pca/issue-certificate.html)\.
+ Using the API: [IssueCertificate](https://docs.aws.amazon.com/acm-pca/latest/APIReference/API_IssueCertificate.html)\.
The table below lists template types supported by ACM Private CA and links to their definitions\.
****
| Template Name | Template ARN | Certificate Type | Path Length |
| --- | --- | --- | --- | | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/UsingTemplates.md |
fa19bd3b272f-1 | | Template Name | Template ARN | Certificate Type | Path Length |
| --- | --- | --- | --- |
| [CodeSigningCertificate/V1](#CodeSigningCertificate-V1) | `arn:aws:acm-pca:::template/CodeSigningCertificate/V1` | Code signing | Not applicable |
| [CodeSigningCertificate\_CSRPassthrough/V1](#CodeSigningCertificate_CSRPassthrough-V1) | `arn:aws:acm-pca:::template/CodeSigningCertificate_CSRPassthrough/V1` | Code signing | Not applicable |
| [EndEntityCertificate/V1](#EndEntityCertificate-V1) | `arn:aws:acm-pca:::template/EndEntityCertificate/V1` | End\-entity | Not applicable |
| [EndEntityCertificate\_CSRPassthrough/V1](#EndEntityCertificate_CSRPassthrough-V1) | `arn:aws:acm-pca:::template/EndEntityCertificate_CSRPassthrough/V1` | End\-entity/passthrough | Not applicable | | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/UsingTemplates.md |
fa19bd3b272f-2 | | [EndEntityClientAuthCertificate/V1](#EndEntityClientAuthCertificate-V1) | `arn:aws:acm-pca:::template/EndEntityClientAuthCertificate/V1` | End\-entity | Not applicable |
| [EndEntityClientAuthCertificate\_CSRPassthrough/V1](#EndEntityClientAuthCertificate_CSRPassthrough-V1) | `arn:aws:acm-pca:::template/EndEntityClientAuthCertificate_CSRPassthrough/V1` | End\-entity/passthrough | Not applicable |
| [EndEntityServerAuthCertificate/V1](#EndEntityServerAuthCertificate-V1) | `arn:aws:acm-pca:::template/EndEntityServerAuthCertificate/V1` | End\-entity | Not applicable |
| [EndEntityServerAuthCertificate\_CSRPassthrough/V1](#EndEntityServerAuthCertificate_CSRPassthrough-V1) | `arn:aws:acm-pca:::template/EndEntityServerAuthCertificate_CSRPassthrough/V1` | End\-entity/passthrough | Not applicable | | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/UsingTemplates.md |
fa19bd3b272f-3 | | [OCSPSigningCertificate/V1](#OCSPSigningCertificate-V1) | `arn:aws:acm-pca:::template/OCSPSigningCertificate/V1` | OCSP signing | Not applicable |
| [OCSPSigningCertificate\_CSRPassthrough/V1](#OCSPSigningCertificate_CSRPassthrough-V1) | `arn:aws:acm-pca:::template/OCSPSigningCertificate_CSRPassthrough/V1` | OCSP signing | Not applicable |
| [RootCACertificate/V1](#RootCACertificate-V1) | `arn:aws:acm-pca:::template/RootCACertificate/V1` | CA | Unconstrained |
| [SubordinateCACertificate\_PathLen0/V1](#SubordinateCACertificate_PathLen0-V1) | `arn:aws:acm-pca:::template/SubordinateCACertificate_PathLen0/V1` | CA | 0 |
| [SubordinateCACertificate\_PathLen1/V1](#SubordinateCACertificate_PathLen1-V1) | `arn:aws:acm-pca:::template/SubordinateCACertificate_PathLen1/V1` | CA | 1 | | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/UsingTemplates.md |
fa19bd3b272f-4 | | [SubordinateCACertificate\_PathLen2/V1](#SubordinateCACertificate_PathLen2-V1) | `arn:aws:acm-pca:::template/SubordinateCACertificate_PathLen2/V1` | CA | 2 |
| [SubordinateCACertificate\_PathLen3/V1](#SubordinateCACertificate_PathLen3-V1) | `arn:aws:acm-pca:::template/SubordinateCACertificate_PathLen3/V1` | CA | 3 |
For information about template ARNs in GovCloud regions, see [AWS Certificate Manager Private Certificate Authority](https://docs.aws.amazon.com/govcloud-us/latest/UserGuide/using-govcloud-arns.html#using-govcloud-arn-syntax-acmpca) in the *AWS GovCloud \(US\) User Guide*\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/UsingTemplates.md |
0ffe922ca159-0 | This template is used to create certificates for code signing\. You can use code\-signing certificates from ACM Private CA with any code\-signing solution that is based on a private CA infrastructure\. For example, customers using Code Signing for AWS IoT can generate a code\-signing certificate with ACM Private CA and import it to AWS Certificate Manager\. For more information, see [What Is Code Signing for AWS IoT?](https://docs.aws.amazon.com/signer/latest/developerguide/Welcome.html) and [Obtain and Import a Code Signing Certificate](https://docs.aws.amazon.com/signer/latest/developerguide/gs-cs-cert.html)\.
****
| Parameter | Value |
| --- | --- |
| X509v3 subject alternative name | \[copy from CSR\] |
| X509v3 basic constraints | `CA:FALSE` |
| X509v3 authority key identifier | \[AKI\] |
| X509v3 subject key identifier | \[SKI\] |
| X509v3 key usage | critical, digital signature |
| X509v3 extended key usage | critical, code signing |
| X509v3 CRL distribution points\* | \[CRL distribution point\] |
\*CRL distribution points are included in the template only if the CA is configured with CRL generation enabled\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/UsingTemplates.md |
6e40ebe24beb-0 | This template is identical to the `CodeSigningCertificate` template with one difference: In this template, ACM Private CA passes additional extensions from the certificate signing request \(CSR\) into the certificate if the extensions are not specified in the template\. Extensions specified in the template always override extensions in the CSR\.
****
| Parameter | Value |
| --- | --- |
| X509v3 subject alternative name | \[copy from CSR\] |
| X509v3 basic constraints | `CA:FALSE` |
| X509v3 authority key identifier | \[AKI\] |
| X509v3 subject key identifier | \[SKI\] |
| X509v3 key usage | critical, digital signature |
| X509v3 extended key usage | critical, code signing |
| X509v3 CRL distribution points\* | \[CRL distribution point\] |
\*CRL distribution points are included in the template only if the CA is configured with CRL generation enabled\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/UsingTemplates.md |
824f7cde7f6f-0 | This template is used to create certificates for end entities such as operating systems or web servers\.
****
| Parameter | Value |
| --- | --- |
| X509v3 subject alternative name | \[copy from CSR\] |
| X509v3 basic constraints | CA:`FALSE` |
| X509v3 authority key identifier | \[AKI\] |
| X509v3 subject key identifier | \[SKI\] |
| X509v3 key usage | critical, digital signature, key encipherment |
| X509v3 extended key usage | TLS web server authentication, TLS web client authentication |
| X509v3 CRL distribution points\* | \[CRL distribution point\] |
\*CRL distribution points are included in the template only if the CA is configured with CRL generation enabled\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/UsingTemplates.md |
ec6f19a48baa-0 | This template is identical to the `EndEntityCertificate` template with one difference: In this template, ACM Private CA passes additional extensions from the certificate signing request \(CSR\) into the certificate if the extensions are not specified in the template\. Extensions specified in the template always override extensions in the CSR\.
****
| Parameter | Value |
| --- | --- |
| X509v3 subject alternative name | \[copy from CSR\] |
| X509v3 basic constraints | `CA:FALSE` |
| X509v3 authority key identifier | \[AKI\] |
| X509v3 subject key identifier | \[SKI\] |
| X509v3 key usage | critical, digital signature, key encipherment |
| X509v3 extended key usage | TLS web server authentication, TLS web client authentication |
| X509v3 CRL distribution points\* | \[CRL distribution point\] |
\*CRL distribution points are included in the template only if the CA is configured with CRL generation enabled\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/UsingTemplates.md |
ef04de6075c6-0 | This template differs from the `EndEntityCertificate` only in the extended key usage value, which restricts it to TLS web client authentication\.
****
| Parameter | Value |
| --- | --- |
| X509v3 subject alternative name | \[copy from CSR\] |
| X509v3 basic constraints | `CA:FALSE` |
| X509v3 authority key identifier | \[AKI\] |
| X509v3 subject key identifier | \[SKI\] |
| X509v3 key usage | critical, digital signature, key encipherment |
| X509v3 extended key usage | TLS web client authentication |
| X509v3 CRL distribution points\* | \[CRL distribution point\] |
\*CRL distribution points are included in the template only if the CA is configured with CRL generation enabled\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/UsingTemplates.md |
ada31f4cb6be-0 | This template is identical to the `EndEntityClientAuthCertificate` template with one difference\. In this template, ACM Private CA passes additional extensions from the certificate signing request \(CSR\) into the certificate if the extensions are not specified in the template\. Extensions specified in the template always override extensions in the CSR\.
****
| Parameter | Value |
| --- | --- |
| X509v3 subject alternative name | \[copy from CSR\] |
| X509v3 basic constraints | `CA:FALSE` |
| X509v3 authority key identifier | \[AKI\] |
| X509v3 subject key identifier | \[SKI\] |
| X509v3 key usage | critical, digital signature, key encipherment |
| X509v3 extended key usage | TLS web client authentication |
| X509v3 CRL distribution points\* | \[CRL distribution point\] |
\*CRL distribution points are included in the template only if the CA is configured with CRL generation enabled\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/UsingTemplates.md |
a63e4955c462-0 | This template differs from the `EndEntityCertificate` only in the extended key usage value, which restricts it to TLS web server authentication\.
****
| Parameter | Value |
| --- | --- |
| X509v3 subject alternative name | \[copy from CSR\] |
| X509v3 basic constraints | `CA:FALSE` |
| X509v3 authority key identifier | \[AKI\] |
| X509v3 subject key identifier | \[SKI\] |
| X509v3 key usage | critical, digital signature, key encipherment |
| X509v3 extended key usage | TLS web server authentication |
| X509v3 CRL distribution points\* | \[CRL distribution point\] |
\*CRL distribution points are included in the template only if the CA is configured with CRL generation enabled\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/UsingTemplates.md |
de4cb96bf706-0 | This template is identical to the `EndEntityServerAuthCertificate` template with one difference\. In this template, ACM Private CA passes additional extensions from the certificate signing request \(CSR\) into the certificate if the extensions are not specified in the template\. Extensions specified in the template always override extensions in the CSR\.
****
| Parameter | Value |
| --- | --- |
| X509v3 subject alternative name | \[copy from CSR\] |
| X509v3 basic constraints | `CA:FALSE` |
| X509v3 authority key identifier | \[AKI\] |
| X509v3 subject key identifier | \[SKI\] |
| X509v3 key usage | critical, digital signature, key encipherment |
| X509v3 extended key usage | TLS web server authentication |
| X509v3 CRL distribution points\* | \[CRL distribution point\] |
\*CRL distribution points are included in the template only if the CA is configured with CRL generation enabled\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/UsingTemplates.md |
8822c168459c-0 | This template is used to create certificates for signing OCSP responses\. The template is identical to the `CodeSigningCertificate` template, except that the extended key usage value specifies OCSP signing instead of code signing\.
****
| Parameter | Value |
| --- | --- |
| X509v3 subject alternative name | \[copy from CSR\] |
| X509v3 basic constraints | `CA:FALSE` |
| X509v3 authority key identifier | \[AKI\] |
| X509v3 subject key identifier | \[SKI\] |
| X509v3 key usage | critical, digital signature |
| X509v3 extended key usage | critical, OCSP signing |
| X509v3 CRL distribution points\* | \[CRL distribution point\] |
\*CRL distribution points are included in the template only if the CA is configured with CRL generation enabled\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/UsingTemplates.md |
c91ab3c6462d-0 | This template is identical to the `OCSPSigningCertificate` template with one difference\. In this template, ACM Private CA passes additional extensions from the certificate signing request \(CSR\) into the certificate if the extensions are not specified in the template\. Extensions specified in the template always override extensions in the CSR\.
****
| Parameter | Value |
| --- | --- |
| X509v3 subject alternative name | \[copy from CSR\] |
| X509v3 basic constraints | `CA:FALSE` |
| X509v3 authority key identifier | \[AKI\] |
| X509v3 subject key identifier | \[SKI\] |
| X509v3 key usage | critical, digital signature |
| X509v3 extended key usage | critical, OCSP signing |
| X509v3 CRL distribution points\* | \[CRL distribution point\] |
\*CRL distribution points are included in the template only if the CA is configured with CRL generation enabled\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/UsingTemplates.md |
1e26d34b97ff-0 | This template is used to issue self\-signed root CA certificates\. CA certificates include a critical basic constraints extension with the CA field set to `TRUE` to designate that the certificate can be used to issue CA certificates\. This template does not specify a path length because the path length constrains the maximum length of the CA chain \(CA certification depth\)\. A constrained chain length could inhibit future expansion of the hierarchy\. Extended key usage is excluded to prevent use of the CA certificate as a TLS client or server certificate\. No CRL information is specified because a self\-signed certificate cannot be revoked\.
****
| Parameter | Value |
| --- | --- |
| X509v3 subject alternative name | \[Copy from CSR\] |
| X509v3 basic constraints | Critical, `CA:TRUE` |
| X509v3 authority key identifier | \[AKI\] |
| X509v3 subject key identifier | \[SKI\] |
| X509v3 key usage | Critical, digital signature, keyCertSign, CRL sign |
| X509v3 CRL distribution points | N/A | | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/UsingTemplates.md |
39999f70f30e-0 | This template is used to issue subordinate CA certificates with a path length of 0\. CA certificates include a critical basic constraints extension with the CA field set to `TRUE` to designate that the certificate can be used to issue CA certificates\. Extended key usage is not included, which prevents the CA certificate from being used as a TLS client or server certificate\.
For more information about certification paths, see [Setting Length Constraints on the Certification Path](https://docs.aws.amazon.com/acm-pca/latest/userguide/ca-hierarchy.html#length-constraints)\.
****
| Parameter | Value |
| --- | --- |
| X509v3 subject alternative name | \[copy from CSR\] |
| X509v3 basic constraints | Critical, CA:TRUE, pathlen: 0 |
| X509v3 authority key identifier | \[AKI\] |
| X509v3 subject key identifier | \[SKI\] |
| X509v3 key usage | critical, digital signature, `keyCertSign`, CRL sign |
| X509v3 CRL distribution points\* | \[CRL distribution point\] |
\*CRL distribution points are included in certificates issued with this template only if the CA is configured with CRL generation enabled\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/UsingTemplates.md |
89da096bf09d-0 | This template is used to issue subordinate CA certificates with a path length of 1\. CA certificates include a critical basic constraints extension with the CA field set to `TRUE` to designate that the certificate can be used to issue CA certificates\. Extended key usage is not included, which prevents the CA certificate from being used as a TLS client or server certificate\.
For more information about certification paths, see [Setting Length Constraints on the Certification Path](https://docs.aws.amazon.com/acm-pca/latest/userguide/ca-hierarchy.html#length-constraints)\.
****
| Parameter | Value |
| --- | --- |
| X509v3 subject alternative name | \[copy from CSR\] |
| X509v3 basic constraints | Critical, CA:TRUE, pathlen: 1 |
| X509v3 authority key identifier | \[AKI\] |
| X509v3 subject key identifier | \[SKI\] |
| X509v3 key usage | critical, digital signature, `keyCertSign`, CRL sign |
| X509v3 CRL distribution points\* | \[CRL distribution point\] |
\*CRL distribution points are included in certificates issued with this template only if the CA is configured with CRL generation enabled\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/UsingTemplates.md |
c19822dfe811-0 | This template is used to issue subordinate CA certificates with a path length of 2\. CA certificates include a critical basic constraints extension with the CA field set to `TRUE` to designate that the certificate can be used to issue CA certificates\. Extended key usage is not included, which prevents the CA certificate from being used as a TLS client or server certificate\.
For more information about certification paths, see [Setting Length Constraints on the Certification Path](https://docs.aws.amazon.com/acm-pca/latest/userguide/ca-hierarchy.html#length-constraints)\.
****
| Parameter | Value |
| --- | --- |
| X509v3 subject alternative name | \[copy from CSR\] |
| X509v3 basic constraints | Critical, CA:TRUE, pathlen: 2 |
| X509v3 authority key identifier | \[AKI\] |
| X509v3 subject ky identifier | \[SKI\] |
| X509v3 key usage | critical, digital signature, `keyCertSign`, CRL sign |
| X509v3 CRL distribution points\* | \[CRL distribution point\] |
\*CRL distribution points are included in certificates issued with this template only if the CA is configured with CRL generation enabled\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/UsingTemplates.md |
1c410ff7a7c1-0 | This template is used to issue subordinate CA certificates with a path length of 3\. CA certificates include a critical basic constraints extension with the CA field set to `TRUE` to designate that the certificate can be used to issue CA certificates\. Extended key usage is not included, which prevents the CA certificate from being used as a TLS client or server certificate\.
For more information about certification paths, see [Setting Length Constraints on the Certification Path](https://docs.aws.amazon.com/acm-pca/latest/userguide/ca-hierarchy.html#length-constraints)\.
****
| Parameter | Value |
| --- | --- |
| X509v3 subject alternative name | \[copy from CSR\] |
| X509v3 basic constraints | Critical, CA:TRUE, pathlen: 3 |
| X509v3 authority key identifier | \[AKI\] |
| X509v3 subject key identifier | \[SKI\] |
| X509v3 key usage | critical, digital signature, `keyCertSign`, CRL sign |
| X509v3 CRL distribution points\* | \[CRL distribution point\] |
\*CRL distribution points are included in certificates issued with this template only if the CA is configured with CRL generation enabled\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/UsingTemplates.md |
7cdcd57f2f1d-0 | A private CA from ACM Private CA can be used to sign certificates by any user with the necessary permissions on the CA\. The CA owner can issue certificates or delegate the required permissions for issuing certificates to an AWS Identity and Access Management \(IAM\) user residing in the same AWS account\. A user residing in a different AWS account can also issue certificates if authorized by the CA owner through a [resource\-based policy](pca-rbp.md)\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/granting-ca-access.md |
7cdcd57f2f1d-1 | Authorized users, whether single\-account or cross\-account, have a choice of ACM Private CA or AWS Certificate Manager resources when issuing certificates\. Certificates issued by using the ACM Private CA [IssueCertificate](https://docs.aws.amazon.com/acm-pca/latest/APIReference/API_IssueCertificate.html) API or [issue\-certificate](https://docs.aws.amazon.com/cli/latest/reference/acm-pca/issue-certificate.html) CLI command are unmanaged, requiring manual installation on target devices and manual renewal when they expire\. Certificates issued by using the ACM console, the ACM [RequestCertificate](https://docs.aws.amazon.com/acm/latest/APIReference/API_RequestCertificate.html) API, or the [request\-certificate](https://docs.aws.amazon.com/cli/latest/reference/acm/request-certificate.html) CLI command are managed, allowing them to be installed easily in services integrated with ACM\. If the CA administrator permits it and the issuer's account has a [service\-linked role](https://docs.aws.amazon.com/acm/latest/userguide/acm-slr.html) in place for ACM, managed certificates are renewed automatically when they expire\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/granting-ca-access.md |
ed3b00e49ce1-0 | When the CA administrator \(that is, the owner of the CA\) and the certificate issuer reside in a single AWS account, a best practice is to separate the issuer and administrator roles by creating an AWS Identity and Access Management \(IAM\) user with limited permissions\. For information about using IAM with ACM Private CA, along with example permissions, see [Understanding Resources, Ownership, and Permissions Policies](security-iam.md#understand-resource-ownership)\.
**Single\-Account Case 1: Issuing an unmanaged certificate**
In this case, the account owner creates a private CA, and then creates an IAM user with permission to issue certificates signed by the private CA\. The IAM user issues a certificate using the ACM Private CA `IssueCertificate` API\.
![\[Issuing an unmanaged certificate\]](http://docs.aws.amazon.com/acm-pca/latest/userguide/images/ca_access_1_account_pca_api.png) | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/granting-ca-access.md |
ed3b00e49ce1-1 | Certificates issued in this manner are unmanaged, which means that an administrator must export them and install them on devices where they are intended to be used\. They also must be manually renewed when they expire\. Issuing a certificate using this API requires a certificate signing request \(CSR\) and key pair generated outside of ACM Private CA by [OpenSSL](https://www.openssl.org/) or a similar program\. For more information, see the `IssueCertificate` [documentation](https://docs.aws.amazon.com/acm-pca/latest/APIReference/API_IssueCertificate.html)\.
**Single\-Account Case 2: Issuing a managed certificate through ACM**
This second case involves APIs from both ACM and PCA\. The account owner creates a private CA and IAM user as before, and then [grants permission](PcaCreateCa.md#configure-acm-renewal) to the ACM service principal to renew automatically any certificates signed by this CA\. The IAM user again issues the certificate, but this time using the ACM `RequestCertificate` API, which handles CSR and key generation\. When the certificates expires, ACM automates the renewal workflow\.
![\[Issuing a managed certificate\]](http://docs.aws.amazon.com/acm-pca/latest/userguide/images/ca_access_1_account_acm_api.png) | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/granting-ca-access.md |
ed3b00e49ce1-2 | The account owner has the option of granting renewal permission through the management console during or after CA creation, or using the PCA `CreatePermission` API\. The managed certificates created from this workflow are available for use on with AWS services that are integrated with ACM\.
The following section contains procedures for granting renewal permissions\. | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/granting-ca-access.md |
bc92818d0fc5-0 | With [managed renewal](https://docs.aws.amazon.com/acm/latest/userguide/managed-renewal.html) in AWS Certificate Manager \(ACM\), you can automate the certificate renewal process for both public and private certificates\. In order for ACM to automatically renew the certificates generated by a private CA, the ACM service principal must be given all possible permissions *by the CA itself*\. If these renewal permissions are not present for ACM, the CA's owner \(or an authorized representative\) must manually reissue each private certificate when it expires\.
**Important**
These procedures for assigning renewal permissions apply only when the CA owner and the certificate issuer reside in the same AWS account\. For cross\-account scenarios, see [Attach a Policy for Cross\-Account Access](#attach-policy)\.
Renewal permissions can be delegated during [private CA creation](PcaCreateCa.md) or altered anytime after as long as the CA is in the `ACTIVE` state\.
You can manage private CA permissions from the [ACM Private CA Console](https://console.aws.amazon.com/acm-pca), the [AWS Command Line Interface \(AWS CLI\)](https://aws.amazon.com/cli/), or the [ACM Private CA API](https://docs.aws.amazon.com/acm-pca/latest/APIReference/):
**To assign private CA permissions to ACM \(console\)** | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/granting-ca-access.md |
bc92818d0fc5-1 | **To assign private CA permissions to ACM \(console\)**
1. Sign in to your AWS account and open the ACM Private CA console at [https://console\.aws\.amazon\.com/acm\-pca/home](https://console.aws.amazon.com/acm-pca/home)\.
1. Choose **Private CAs**\.
1. Choose your private CA from the list\.
1. Choose the **Permission** tab\.
1. Select **Authorize ACM to use this CA for renewals**\.
1. Choose **Save**\.
**To manage ACM permissions in ACM Private CA \(AWS CLI\)**
Use the [create\-permission](https://docs.aws.amazon.com/cli/latest/reference/acm-pca/create-permission.html) command to assign permissions to ACM\. You must assign the necessary permissions \(`IssueCertificate`, `GetCertificate`, and `ListPermissions`\) in order for ACM to automatically renew your certificates\.
```
aws acm-pca create-permission \
--certificate-authority-arn arn:aws:acm-pca:region:account:\
certificate-authority/12345678-1234-1234-1234-123456789012 \ | https://github.com/siagholami/aws-documentation/tree/main/documents/aws-private-ca-user-guide/doc_source/granting-ca-access.md |
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