diff options
| -rw-r--r-- | Lib/hmac.py | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/Lib/hmac.py b/Lib/hmac.py index df2bffd..ed5afc7 100644 --- a/Lib/hmac.py +++ b/Lib/hmac.py @@ -7,7 +7,7 @@ trans_5C = "".join ([chr (x ^ 0x5C) for x in xrange(256)]) trans_36 = "".join ([chr (x ^ 0x36) for x in xrange(256)]) # The size of the digests returned by HMAC depends on the underlying -# hashing module used. +# hashing module used. Use digest_size from the instance of HMAC instead. digest_size = None # A unique object passed by HMAC.copy() to the HMAC constructor, in order @@ -20,6 +20,7 @@ class HMAC: This supports the API for Cryptographic Hash Functions (PEP 247). """ + blocksize = 64 # 512-bit HMAC; can be changed in subclasses. def __init__(self, key, msg = None, digestmod = None): """Create a new HMAC object. @@ -47,7 +48,7 @@ class HMAC: self.inner = self.digest_cons() self.digest_size = self.inner.digest_size - blocksize = 64 + blocksize = self.blocksize if len(key) > blocksize: key = self.digest_cons(key).digest() @@ -70,7 +71,7 @@ class HMAC: An update to this copy won't affect the original object. """ - other = HMAC(_secret_backdoor_key) + other = self.__class__(_secret_backdoor_key) other.digest_cons = self.digest_cons other.digest_size = self.digest_size other.inner = self.inner.copy() |