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import streamlit as st
import hashlib
import pandas as pd
import qrcode
from io import BytesIO
from datetime import datetime
import json
import base64
# Set page config
st.set_page_config(
page_title="Document Integrity Checker",
page_icon="🔐",
layout="wide"
)
# Custom CSS
st.markdown("""
<style>
.stApp {
max-width: 1200px;
margin: 0 auto;
}
.status-success {
padding: 1rem;
border-radius: 4px;
background-color: #dcfce7;
color: #166534;
}
.status-error {
padding: 1rem;
border-radius: 4px;
background-color: #fee2e2;
color: #991b1b;
}
.hash-display {
font-family: monospace;
padding: 1rem;
background-color: #f8fafc;
border-radius: 4px;
}
</style>
""", unsafe_allow_html=True)
def calculate_hash(file_bytes):
"""Calculate SHA-256 hash of file"""
sha256_hash = hashlib.sha256()
sha256_hash.update(file_bytes)
return sha256_hash.hexdigest()
def generate_qr(data):
"""Generate QR code for hash"""
qr = qrcode.QRCode(version=1, box_size=10, border=5)
qr.add_data(data)
qr.make(fit=True)
img = qr.make_image(fill_color="black", back_color="white")
# Convert to bytes
buffered = BytesIO()
img.save(buffered, format="PNG")
return buffered.getvalue()
def save_to_history(filename, file_hash):
"""Save verification to history"""
history = json.loads(st.session_state.get('history', '[]'))
history.insert(0, {
'filename': filename,
'hash': file_hash,
'timestamp': datetime.now().isoformat()
})
# Keep only last 10 entries
history = history[:10]
st.session_state['history'] = json.dumps(history)
def get_history():
"""Get verification history"""
try:
return json.loads(st.session_state.get('history', '[]'))
except:
return []
def main():
# Header
st.title("🔐 Document Integrity Checker")
st.markdown("Verifikasi & Lindungi Integritas Dokumen Anda dengan SHA-256")
# Main content
col1, col2 = st.columns([2, 1])
with col1:
st.subheader("Upload Document")
uploaded_files = st.file_uploader(
"Drag and drop files here",
accept_multiple_files=True,
type=['pdf', 'doc', 'docx', 'txt', 'jpg', 'png']
)
if uploaded_files:
for uploaded_file in uploaded_files:
# Calculate hash
file_bytes = uploaded_file.read()
file_hash = calculate_hash(file_bytes)
# Display hash
st.markdown(f"**File:** {uploaded_file.name}")
st.markdown(f"""
<div class='hash-display'>
{file_hash}
</div>
""", unsafe_allow_html=True)
# Generate and display QR
qr_code = generate_qr(file_hash)
st.image(qr_code, caption="Scan untuk verifikasi hash")
# Save to history
save_to_history(uploaded_file.name, file_hash)
# Verification input
expected_hash = st.text_input("Masukkan hash untuk verifikasi:", key=f"verify_{uploaded_file.name}")
if expected_hash:
if expected_hash.lower() == file_hash.lower():
st.markdown("""
<div class='status-success'>
✅ Hash cocok! Dokumen terverifikasi.
</div>
""", unsafe_allow_html=True)
else:
st.markdown("""
<div class='status-error'>
❌ Hash tidak cocok! Dokumen mungkin telah diubah.
</div>
""", unsafe_allow_html=True)
with col2:
st.subheader("Riwayat Verifikasi")
history = get_history()
if history:
for entry in history:
with st.expander(f"{entry['filename']}"):
st.code(entry['hash'], language='text')
st.text(f"Verified: {datetime.fromisoformat(entry['timestamp']).strftime('%Y-%m-%d %H:%M:%S')}")
else:
st.info("Belum ada riwayat verifikasi")
# Features explanation
st.markdown("---")
feat_col1, feat_col2, feat_col3 = st.columns(3)
with feat_col1:
st.markdown("### 🚀 Real-time Processing")
st.markdown("Hasil hash instan saat file diunggah")
with feat_col2:
st.markdown("### 📁 Multiple Files")
st.markdown("Proses beberapa file sekaligus")
with feat_col3:
st.markdown("### 📱 QR Code")
st.markdown("Share hash dengan mudah via QR")
if __name__ == "__main__":
main() |