def sign(message, prikey, encoding='utf8'):
assert isinstance(message, str), 'message must be a sting!'
assert isinstance(prikey, str), 'prikey must be a sting!'
message = message.encode(encoding)
prider = base64.b64decode(prikey)
priv_key = rsa.PrivateKey.load_pkcs1(prider, 'DER')
message_hash = hashlib.md5(message).digest()
keylength = common.byte_size(priv_key.n)
block_length = keylength - 11
assert block_length > 0, 'nbits of key is to small, please set bigger then 128!'
signature = b''
while message_hash:
cleartext = message_hash[:block_length]
message_hash = message_hash[block_length:]
# ===== copy from rsa.pkcs1:sign_hash =====
padded = _pad_for_signing(cleartext, keylength)
payload = transform.bytes2int(padded)
encrypted = priv_key.blinded_encrypt(payload)
block = transform.int2bytes(encrypted, keylength)
signature += block
signature = base64.b64encode(signature).decode()
return signature
def encrypt(self, message, file):
self._load_key_file(file)
keylength = common.byte_size(self._private_key.n)
padded = pkcs1._pad_for_signing(bytes(message, encoding="utf-8"),
keylength)
payload = transform.bytes2int(padded)
encrypted = self._private_key.blinded_encrypt(payload)
block = transform.int2bytes(encrypted, keylength)
return base64.urlsafe_b64encode(block).decode("utf-8")
def signature_hhj(after_hash, private_key, encoding='utf8'):
after_hash1 = str(after_hash)
after_hash2 = after_hash1.encode(encoding)
prider = base64.b64decode(private_key)
priv_key = rsa.PrivateKey.load_pkcs1(prider, 'DER')
keylength = common.byte_size(priv_key.n)
block_length = keylength - 11
assert block_length > 0, 'nbits of key is to small, please set bigger then 128!'
signature = b''
while after_hash2:
cleartext = after_hash2[:block_length]
after_hash2 = after_hash2[block_length:]
# ===== copy from rsa.pkcs1:sign_hash =====
padded = _pad_for_signing(cleartext, keylength)
payload = transform.bytes2int(padded)
encrypted = priv_key.blinded_encrypt(payload)
block = transform.int2bytes(encrypted, keylength)
signature += block
signature = base64.b64encode(signature).decode()
#print("--------------签名成功--------------")
return signature