| 0,0 → 1,36 |
|---|
| """ crypto.cipher.hash |
| Base class for cryptographic hash algorithms |
| An alternate interface (no 'new'). |
| Copyright © (c) 2002 by Paul A. Lambert. |
| """ |
| from binascii import b2a_hex |
| |
| class Hash: |
| def __init__( self ): |
| raise 'must overload' |
| def reset(self): |
| raise 'must overload' |
| def __call__(self, data, more=None): |
| return self.hash(data,more) |
| def hash(self,data,more=None): |
| self.update(data) |
| digest = self.digest() |
| if more==None: |
| self.reset() # no more data, reset |
| return digest |
| def update(self,data): |
| """ Update the hash object with the data. Repeated calls are |
| equivalent to a single call with the concatenation of all the |
| arguments: m.update(a); m.update(b) is equivalent to m.update(a+b). |
| """ |
| raise 'must overload' |
| def digest(self): |
| raise 'must overload' |
| def final(self,data): |
| return self.hash(data) |
| def hexdigest(self): |
| """ Return the digest of the data in ascii-hex format """ |
| return b2a_hex(self.digest()) |
| # def hexdigest(self): not supported yet |
| # def copy(self): not supported yet ... may change |
| |