import codecs from Crypto.PublicKey import RSA from Crypto.Cipher import PKCS1_OAEP from Crypto.Cipher import KPCS1_V1_5 as V1_5 from Crypto.Signature import PKCS1_v1_5 from Crypto.Hash import SHA512, SHA384, SHA256, SHA, MD5 from Crypto import Random from base64 import b64encode, b64decode hash = "SHA-256" def readPublickey(fname): with codecs.open(fname,'r','utf8') as f: b = f.read() k = RSA.importKey(b) return k return None def readPrivatekey(fname,pwd): with codecs.open(fname,'r','utf8') as f: b = f.read() k = RSA.importKey(b,pwd) return k return None def newkeys(keysize): random_generator = Random.new().read key = RSA.generate(keysize, random_generator) private, public = key, key.publickey() return public, private def importKey(externKey): return RSA.importKey(externKey) def getpublickey(priv_key): return priv_key.publickey() def encrypt(message, pub_key): cipher = PKCS1_OAEP.new(pub_key) return cipher.encrypt(message) def decrypt(ciphertext, priv_key): try: cipher = PKCS1_OAEP.new(priv_key) return cipher.decrypt(ciphertext) except Exception as e: print('e=',e) cipher = V1_5.new(priv_key) return cipher.decrypt(ciphertext) def sign(message, priv_key, hashAlg = "SHA-256"): global hash hash = hashAlg signer = PKCS1_v1_5.new(priv_key) if (hash == "SHA-512"): digest = SHA512.new() elif (hash == "SHA-384"): digest = SHA384.new() elif (hash == "SHA-256"): digest = SHA256.new() elif (hash == "SHA-1"): digest = SHA.new() else: digest = MD5.new() digest.update(message) return signer.sign(digest) def verify(message, signature, pub_key): signer = PKCS1_v1_5.new(pub_key) if (hash == "SHA-512"): digest = SHA512.new() elif (hash == "SHA-384"): digest = SHA384.new() elif (hash == "SHA-256"): digest = SHA256.new() elif (hash == "SHA-1"): digest = SHA.new() else: digest = MD5.new() digest.update(message) return signer.verify(digest, signature) if __name__ == '__main__': cipher="""WaMlLEYnhBk+kTDyN/4OJmQf4ccNdk6USgtKpb7eHsYsotq4iyXi3N5hB1E/PqrPSmca1AMDLUcumwIrLeGLT9it3eTBQgl1YQAsmPxa6lF/rDOZoLbwD5sJ6ab/0/fuM4GbotqN5/d0MeuOSELoo8cFWw+7XpRxn9EMYnw5SzsjDQRWxXjZptoaGa/8pBBkDmgLqINif9EWV+8899xqTd0e9w1Gqb7wbt/elRNVBpgsSuSZb+dtBlvNUjuTms8BETSRai5vhXetK26Ms8hrayiy38n7wwEKE8fZ9iFzLtwa6xbhD5KudWbKJFFOZAfpzWttGMwWlISbGQigcW4+Bg==""" key = readPrivatekey('d:/dev/mecp/conf/RSA.private.key','ymq123') t = decrypt(cipher,key) print('t=',t)