def AttachedSign(self, data, nonce):
"""
Sign given data and nonce and return a blob containing both data and
signature
For message M, and nonce N, outputs Header|len(M)|M|Sig(Header|M|N).
@param data: message to be signed
@type data: string
@param nonce: nonce to be included in the signature
@type nonce: string
@return: signature on the data encoded as a Base64 string
@rtype: string
"""
return util.Base64WSEncode(self.primary_key.Header()
+ util.PackByteArray(data)
+ self.__InternalSign(data, nonce))
def AttachedSign(self, data, nonce, encoder=util.Base64WSEncode):
"""
Sign given data and nonce and return a blob containing both data and
signature
For message M, and nonce N, outputs Header|len(M)|M|Sig(M|len(N)|N|VersionByte).
@param data: message to be signed
@type data: string
@param nonce: nonce to be included in the signature
@type nonce: string
@return: signature on the data encoded as a Base64 string
@rtype: string
"""
signature = self.primary_key.Header() \
+ util.PackByteArray(data) \
+ self.__InternalSign(data, nonce)
return encoder(signature) if encoder else signature
def __InternalSign(self, data, nonce = None):
signing_key = self.primary_key
if signing_key is None:
raise errors.NoPrimaryKeyError()
return signing_key.Sign(data + util.PackByteArray(nonce) + VERSION_BYTE)
def __InternalVerify(self, header, signature, data, nonce = None): key = self._ParseHeader(header) return key.Verify(data + util.PackByteArray(nonce) + VERSION_BYTE, signature)
