1 files changed, 64 insertions, 20 deletions
diff --git a/lib/Crypto/Hash/RIPEMD.py b/lib/Crypto/Hash/RIPEMD.py
index 4a6c7bf..33099cb 100644
--- a/lib/Crypto/Hash/RIPEMD.py
+++ b/lib/Crypto/Hash/RIPEMD.py
@@ -18,33 +18,77 @@
 # SOFTWARE.
 # ===================================================================
 
-__revision__ = "$Id$"
+"""RIPEMD-160 cryptographic hash algorithm.
 
-__all__ = ['new', 'digest_size']
+RIPEMD-160_ produces the 160 bit digest of a message.
 
-from Crypto.Util.wrapper import Wrapper
-from Crypto.Util.py3compat import *
+    >>> from Crypto.Hash import RIPEMD
+    >>>
+    >>> h = RIPEMD.new()
+    >>> h.update(b'Hello')
+    >>> print h.hexdigest()
 
-#
-# See http://homes.esat.kuleuven.be/~bosselae/ripemd160.html#More
-#
-# id-ripemd160      	OBJECT IDENTIFIER ::= {
-# 				iso(1) identified-organization(3) teletrust(36)
-# 				algorithm(3) hashAlgorithm(2) ripemd160(1)
-# 				}
+RIPEMD-160 stands for RACE Integrity Primitives Evaluation Message Digest
+with a 160 bit digest. It was invented by Dobbertin, Bosselaers, and Preneel.
+
+This algorithm is considered secure, although it has not been scrutinized as
+extensively as SHA-1. Moreover, it provides an informal security level of just
+80bits.
 
-oid = b("\x06\x05\x2b\x24\x03\x02\x01")
+.. _RIPEMD-160: http://homes.esat.kuleuven.be/~bosselae/ripemd160.html
+"""
 
-def new(data=b("")):
-    obj = Wrapper(hashFactory, data)
-    obj.oid = oid
-    obj.new = globals()['new']
-    if not hasattr(obj, 'digest_size'):
-        obj.digest_size = digest_size
-    return obj
+_revision__ = "$Id$"
+
+__all__ = ['new', 'digest_size', 'RIPEMD160Hash' ]
+
+from Crypto.Util.py3compat import *
+from Crypto.Hash.hashalgo import HashAlgo
 
 import Crypto.Hash._RIPEMD160 as _RIPEMD160
 hashFactory = _RIPEMD160
 
-digest_size = 20
+class RIPEMD160Hash(HashAlgo):
+    """Class that implements a RIPMD-160 hash
+    
+    :undocumented: block_size
+    """
+
+    #: ASN.1 Object identifier (OID)::
+    #:
+    #:  id-ripemd160 OBJECT IDENTIFIER ::= {
+    #:      iso(1) identified-organization(3) teletrust(36)
+    #:       algorithm(3) hashAlgorithm(2) ripemd160(1)
+    #:  }
+    #:
+    #: This value uniquely identifies the RIPMD-160 algorithm.
+    oid = b("\x06\x05\x2b\x24\x03\x02\x01")
+
+    digest_size = 20
+    block_size = 64
+
+    def __init__(self, data=None):
+        HashAlgo.__init__(self, hashFactory, data)
+
+    def new(self, data=None):
+        return RIPEMD160Hash(data)
+
+def new(data=None):
+    """Return a fresh instance of the hash object.
+
+    :Parameters:
+       data : byte string
+        The very first chunk of the message to hash.
+        It is equivalent to an early call to `RIPEMD160Hash.update()`.
+        Optional.
+
+    :Return: A `RIPEMD160Hash` object
+    """
+    return RIPEMD160Hash().new(data)
+
+#: The size of the resulting hash in bytes.
+digest_size = RIPEMD160Hash.digest_size
+
+#: The internal block size of the hash algorithm in bytes.
+block_size = RIPEMD160Hash.block_size