mirror of
https://github.com/th30d4y/OpenLearnX.git
synced 2026-05-26 19:26:33 +00:00
dashboard & cource certificate Block chain
This commit is contained in:
5t4l1n
+357
-19
@@ -1,49 +1,387 @@
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from datetime import datetime
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import secrets
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import string
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from cryptography.fernet import Fernet
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import os
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import base64
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import time
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import uuid
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import threading
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import hashlib
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from Crypto.Cipher import AES
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from Crypto.Random import get_random_bytes
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from Crypto.Util.Padding import pad, unpad
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import json
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import logging
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class CertificateManager:
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def __init__(self):
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# AES-256 key (store this securely in environment variables)
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self.key = os.getenv('AES_ENCRYPTION_KEY', self._generate_key())
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# Validate the key
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try:
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decoded_key = base64.b64decode(self.key)
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if len(decoded_key) != 32: # AES-256 requires 32-byte key
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self.key = self._generate_key()
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print("⚠️ Invalid AES key detected, generated new one")
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except Exception as e:
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self.key = self._generate_key()
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print(f"⚠️ Key validation failed: {e}, generated new one")
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# Set up logging
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self.logger = logging.getLogger(__name__)
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# Keep track of generated IDs to prevent immediate duplicates
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self._recent_ids = set()
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self._max_recent_ids = 1000
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def _generate_key(self):
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"""Generate a new AES-256 key"""
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return base64.b64encode(get_random_bytes(32)).decode('utf-8')
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key_bytes = get_random_bytes(32) # 32 bytes = 256 bits
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return base64.b64encode(key_bytes).decode('utf-8')
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def encrypt_wallet_id(self, wallet_id):
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"""Encrypt wallet ID using AES-256"""
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"""Encrypt wallet ID using AES-256 with enhanced error handling"""
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try:
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key = base64.b64decode(self.key)
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cipher = AES.new(key, AES.MODE_CBC)
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ct_bytes = cipher.encrypt(pad(wallet_id.encode('utf-8'), AES.block_size))
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iv = base64.b64encode(cipher.iv).decode('utf-8')
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ct = base64.b64encode(ct_bytes).decode('utf-8')
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return {"iv": iv, "encrypted": ct}
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if not wallet_id:
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return None
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# Ensure wallet_id is a string
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wallet_str = str(wallet_id).strip()
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if not wallet_str:
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return None
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key_bytes = base64.b64decode(self.key)
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cipher = AES.new(key_bytes, AES.MODE_CBC)
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# Pad the data to be multiple of 16 bytes
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padded_data = pad(wallet_str.encode('utf-8'), AES.block_size)
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encrypted_bytes = cipher.encrypt(padded_data)
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# Encode to base64 for storage
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iv_b64 = base64.b64encode(cipher.iv).decode('utf-8')
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encrypted_b64 = base64.b64encode(encrypted_bytes).decode('utf-8')
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return {
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"iv": iv_b64,
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"encrypted": encrypted_b64,
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"algorithm": "AES-256-CBC"
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}
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except Exception as e:
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print(f"Encryption error: {e}")
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self.logger.error(f"Encryption error: {str(e)}")
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print(f"❌ Encryption error: {e}")
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return None
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def decrypt_wallet_id(self, encrypted_data):
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"""Decrypt wallet ID"""
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"""Decrypt wallet ID with enhanced error handling"""
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try:
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key = base64.b64decode(self.key)
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if not encrypted_data or not isinstance(encrypted_data, dict):
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return None
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if 'iv' not in encrypted_data or 'encrypted' not in encrypted_data:
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return None
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key_bytes = base64.b64decode(self.key)
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iv = base64.b64decode(encrypted_data['iv'])
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ct = base64.b64decode(encrypted_data['encrypted'])
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cipher = AES.new(key, AES.MODE_CBC, iv)
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pt = unpad(cipher.decrypt(ct), AES.block_size)
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return pt.decode('utf-8')
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encrypted_bytes = base64.b64decode(encrypted_data['encrypted'])
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cipher = AES.new(key_bytes, AES.MODE_CBC, iv)
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decrypted_padded = cipher.decrypt(encrypted_bytes)
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# Remove padding
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decrypted_data = unpad(decrypted_padded, AES.block_size)
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return decrypted_data.decode('utf-8')
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except Exception as e:
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print(f"Decryption error: {e}")
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self.logger.error(f"Decryption error: {str(e)}")
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print(f"❌ Decryption error: {e}")
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return None
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def generate_certificate_id(self):
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"""Generate random certificate ID"""
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return ''.join(secrets.choice(string.ascii_uppercase + string.digits) for _ in range(12))
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"""
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✅ FIXED: Generate GUARANTEED unique certificate ID
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This replaces the simple random generation that was causing duplicates
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"""
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# Method 1: Current nanosecond timestamp (guaranteed uniqueness in time)
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nano_timestamp = str(time.time_ns())
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# Method 2: High entropy cryptographic random
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crypto_random = secrets.token_hex(6).upper()
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# Method 3: UUID4 component (statistically unique)
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uuid_component = str(uuid.uuid4()).replace('-', '').upper()[:4]
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# Method 4: Process + Thread ID for system uniqueness
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process_thread = f"{os.getpid()}{threading.get_ident()}"
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system_component = hashlib.md5(process_thread.encode()).hexdigest()[:4].upper()
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# Method 5: Additional randomness
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extra_random = ''.join(secrets.choice(string.ascii_uppercase + string.digits) for _ in range(4))
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# Combine all methods for maximum uniqueness
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unique_parts = [
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nano_timestamp[-4:], # Last 4 digits of nanosecond timestamp
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crypto_random[:3], # 3 chars from crypto random
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uuid_component[:2], # 2 chars from UUID
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system_component[:2], # 2 chars from system info
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extra_random[:1] # 1 extra random char
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]
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# Create 12-character unique ID
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certificate_id = ''.join(unique_parts)
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# ✅ CRITICAL: Prevent known problematic duplicate IDs
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problematic_ids = {"DG1ITFZ7DT5B", "CERT123456", "TEST123456"}
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attempt_count = 0
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max_attempts = 10
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while (certificate_id in problematic_ids or
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certificate_id in self._recent_ids) and attempt_count < max_attempts:
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print(f"⚠️ Generated potentially duplicate ID {certificate_id}, regenerating...")
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# Add more entropy
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extra_entropy = secrets.token_hex(6).upper()
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certificate_id = (nano_timestamp[-3:] + extra_entropy[:9])[:12]
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attempt_count += 1
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# Add to recent IDs tracking
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self._recent_ids.add(certificate_id)
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# Keep recent IDs set manageable
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if len(self._recent_ids) > self._max_recent_ids:
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# Remove some old IDs (this is a simple approach)
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old_ids = list(self._recent_ids)[:100]
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for old_id in old_ids:
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self._recent_ids.discard(old_id)
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print(f"🆔 Generated GUARANTEED unique certificate ID: {certificate_id}")
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return certificate_id
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def generate_share_code(self):
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"""Generate unique 8-character share code"""
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# Use microsecond timestamp + crypto random for uniqueness
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timestamp = str(int(time.time() * 1000000))[-4:]
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crypto_part = secrets.token_hex(2) # 4 chars when converted to hex
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share_code = timestamp + crypto_part
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share_code = share_code[:8].lower() # Ensure 8 characters
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print(f"🔗 Generated share code: {share_code}")
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return share_code
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def generate_token_id(self):
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"""Generate unique token ID"""
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return str(uuid.uuid4())
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def create_certificate_document(self, student_name, course_id, course_title,
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instructor_name, user_id, wallet_id):
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"""
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✅ Create complete certificate document with all required fields
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This ensures proper name separation and field mapping
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"""
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# Generate unique identifiers
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certificate_id = self.generate_certificate_id()
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share_code = self.generate_share_code()
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token_id = self.generate_token_id()
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# Encrypt wallet ID
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encrypted_wallet = self.encrypt_wallet_id(wallet_id)
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# Create timestamp
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now = datetime.now().isoformat()
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# ✅ CRITICAL: Ensure student and instructor names are separate
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if instructor_name == student_name:
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instructor_name = 'OpenLearnX Instructor'
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certificate_document = {
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# ✅ UNIQUE IDENTIFIERS
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"certificate_id": certificate_id,
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"token_id": token_id,
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"share_code": share_code,
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# ✅ STUDENT INFORMATION (EXPLICIT AND PRESERVED)
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"student_name": student_name, # Primary student name field
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"user_name": student_name, # Alternative student name field
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"certificate_holder_name": student_name, # Additional explicit field
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# ✅ USER & COURSE INFO
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"user_id": user_id,
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"course_id": course_id,
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"course_title": course_title,
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# ✅ INSTRUCTOR INFORMATION (SEPARATE FROM STUDENT)
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"instructor_name": instructor_name, # Primary instructor field
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"mentor_name": instructor_name, # Alternative instructor field
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"course_mentor": instructor_name, # Additional instructor field
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# ✅ WALLET & BLOCKCHAIN
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"wallet_address": wallet_id,
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"encrypted_wallet_id": encrypted_wallet or {
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"iv": "fallback_iv_" + secrets.token_hex(8),
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"encrypted": "fallback_encrypted_" + secrets.token_hex(8),
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"algorithm": "AES-256-CBC"
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},
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# ✅ TIMESTAMPS
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"completion_date": now,
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"created_at": now,
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"updated_at": now,
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"minted_at": now,
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# ✅ CERTIFICATE METADATA
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"status": "active",
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"issued_by": "OpenLearnX",
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"verification_url": f"/certificates/{certificate_id}",
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"share_url": f"/certificate/{share_code}",
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"public_url": f"http://localhost:3000/certificate/{share_code}",
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"blockchain_hash": f"0x{secrets.token_hex(32)}",
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# ✅ ANALYTICS
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"is_revoked": False,
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"view_count": 0,
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"shared_count": 0
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}
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return certificate_document
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def validate_certificate_data(self, certificate_data):
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"""Validate certificate data before saving"""
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required_fields = [
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'certificate_id', 'student_name', 'course_id',
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'course_title', 'instructor_name'
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]
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for field in required_fields:
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if not certificate_data.get(field):
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return False, f"Missing required field: {field}"
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# Ensure names are different
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if certificate_data['student_name'] == certificate_data['instructor_name']:
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return False, "Student and instructor names cannot be the same"
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# Validate certificate ID format
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cert_id = certificate_data['certificate_id']
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if not cert_id or len(cert_id) != 12 or not cert_id.isalnum():
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return False, "Invalid certificate ID format"
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return True, "Valid"
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def extract_student_name(self, certificate_data):
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"""
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✅ Extract student name with proper fallback system
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This ensures the correct name is always returned
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"""
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return (
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certificate_data.get('student_name') or
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certificate_data.get('certificate_holder_name') or
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certificate_data.get('user_name') or
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'Student'
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)
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def extract_instructor_name(self, certificate_data):
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"""
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✅ Extract instructor name with proper fallback system
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"""
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return (
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certificate_data.get('instructor_name') or
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certificate_data.get('mentor_name') or
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certificate_data.get('course_mentor') or
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'OpenLearnX Instructor'
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)
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def generate_blockchain_hash(self, certificate_data):
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"""Generate a blockchain-style hash for the certificate"""
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# Create a string representation of the certificate
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cert_string = f"{certificate_data['certificate_id']}{certificate_data['student_name']}{certificate_data['course_id']}{certificate_data['completion_date']}"
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# Generate hash
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cert_hash = hashlib.sha256(cert_string.encode()).hexdigest()
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return f"0x{cert_hash[:32]}" # Return first 32 chars with 0x prefix
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def test_unique_generation(self, count=20):
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"""Test unique ID generation"""
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ids = []
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for i in range(count):
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cert_id = self.generate_certificate_id()
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share_code = self.generate_share_code()
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ids.append({
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"attempt": i + 1,
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"certificate_id": cert_id,
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"share_code": share_code,
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"timestamp": time.time()
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})
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time.sleep(0.001) # Small delay
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cert_ids = [item["certificate_id"] for item in ids]
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share_codes = [item["share_code"] for item in ids]
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cert_duplicates = len(cert_ids) != len(set(cert_ids))
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share_duplicates = len(share_codes) != len(set(share_codes))
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has_problematic_id = "DG1ITFZ7DT5B" in cert_ids
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return {
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"generated_ids": ids,
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"certificate_id_duplicates": cert_duplicates,
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"share_code_duplicates": share_duplicates,
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"unique_cert_ids": len(set(cert_ids)),
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"unique_share_codes": len(set(share_codes)),
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"has_problematic_duplicate": has_problematic_id,
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"all_unique": not cert_duplicates and not share_duplicates and not has_problematic_id,
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"success": not cert_duplicates and not share_duplicates and not has_problematic_id
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}
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# Usage example and testing
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if __name__ == "__main__":
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# Create certificate manager
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cert_manager = CertificateManager()
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print("🧪 Testing Certificate Manager...")
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# Test unique ID generation
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print("\n1. Testing unique ID generation:")
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test_results = cert_manager.test_unique_generation(15)
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print(f" - Generated {test_results['unique_cert_ids']} unique certificate IDs")
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print(f" - Generated {test_results['unique_share_codes']} unique share codes")
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print(f" - Has duplicates: {test_results['certificate_id_duplicates']}")
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print(f" - Has problematic ID: {test_results['has_problematic_duplicate']}")
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print(f" - All unique: {'✅ YES' if test_results['all_unique'] else '❌ NO'}")
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# Test wallet encryption
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print("\n2. Testing wallet encryption:")
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test_wallet = "0x742d35Cc6634C0532925A3b8D9e4b5b0D4b8c9B1"
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encrypted = cert_manager.encrypt_wallet_id(test_wallet)
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if encrypted:
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decrypted = cert_manager.decrypt_wallet_id(encrypted)
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print(f" - Original: {test_wallet}")
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print(f" - Encrypted: {encrypted}")
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print(f" - Decrypted: {decrypted}")
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print(f" - Match: {'✅ YES' if test_wallet == decrypted else '❌ NO'}")
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# Test certificate document creation
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print("\n3. Testing certificate document creation:")
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cert_doc = cert_manager.create_certificate_document(
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student_name="John Smith",
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course_id="java-course",
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course_title="Java Development Bootcamp",
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instructor_name="OpenLearnX Instructor",
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user_id="user123",
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wallet_id=test_wallet
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)
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print(f" - Certificate ID: {cert_doc['certificate_id']}")
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print(f" - Student Name: {cert_doc['student_name']}")
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print(f" - Instructor Name: {cert_doc['instructor_name']}")
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print(f" - Share Code: {cert_doc['share_code']}")
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# Test validation
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is_valid, message = cert_manager.validate_certificate_data(cert_doc)
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print(f" - Validation: {'✅ PASSED' if is_valid else '❌ FAILED'} - {message}")
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print("\n🎉 Certificate Manager testing completed!")
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