From: Zooko O'Whielacronx <zooko@zooko.com>
Date: Sat, 10 Nov 2007 01:21:12 +0000 (-0700)
Subject: remove parts of pycrypto that we are no longer going to use: SHA256 and RSA
X-Git-Tag: allmydata-tahoe-0.7.0~226
X-Git-Url: https://git.rkrishnan.org/%5B/%5D%20/uri/frontends/something?a=commitdiff_plain;h=97de6a03d2c725df2cbcb6ee4a02cbe1476fe3c2;p=tahoe-lafs%2Ftahoe-lafs.git

remove parts of pycrypto that we are no longer going to use: SHA256 and RSA
---

diff --git a/setup.py b/setup.py
index b6ecded6..16babab6 100644
--- a/setup.py
+++ b/setup.py
@@ -122,14 +122,6 @@ setup(name='allmydata-tahoe',
           Extension("allmydata.Crypto.Cipher.AES",
                     include_dirs=["src/allmydata/Crypto"],
                     sources=["src/allmydata/Crypto/AES.c"]),
-          Extension("allmydata.Crypto.Hash.SHA256",
-                    include_dirs=["src/allmydata/Crypto"],
-                    sources=["src/allmydata/Crypto/SHA256.c"]),
-          # _fastmath requires gmp. Since we're not using rsa yet, hold off
-          # on requiring this. (note that RSA.py doesn't require _fastmath,
-          # but I doubt we'd want to use the pure-python version).
-#          Extension("allmydata.Crypto.PublicKey._fastmath",
-#                    sources=["src/allmydata/Crypto/_fastmath.c"]),
           ],
       zip_safe=False, # We prefer unzipped for easier access.
       )
diff --git a/src/allmydata/Crypto/PublicKey/RSA.py b/src/allmydata/Crypto/PublicKey/RSA.py
deleted file mode 100644
index b85e3b3a..00000000
--- a/src/allmydata/Crypto/PublicKey/RSA.py
+++ /dev/null
@@ -1,257 +0,0 @@
-#
-#   RSA.py : RSA encryption/decryption
-#
-#  Part of the Python Cryptography Toolkit
-#
-# Distribute and use freely; there are no restrictions on further
-# dissemination and usage except those imposed by the laws of your
-# country of residence.  This software is provided "as is" without
-# warranty of fitness for use or suitability for any purpose, express
-# or implied. Use at your own risk or not at all.
-#
-
-__revision__ = "$Id: RSA.py,v 1.20 2004/05/06 12:52:54 akuchling Exp $"
-
-from allmydata.Crypto.PublicKey import pubkey
-from allmydata.Crypto.Util import number
-
-_fastmath = None
-try:
-    from allmydata.Crypto.PublicKey import _fastmath
-except ImportError:
-    pass
-
-class error (Exception):
-    pass
-
-def generate(bits, randfunc, progress_func=None):
-    """generate(bits:int, randfunc:callable, progress_func:callable)
-
-    Generate an RSA key of length 'bits', using 'randfunc' to get
-    random data and 'progress_func', if present, to display
-    the progress of the key generation.
-    """
-    obj=RSAobj()
-
-    # Generate the prime factors of n
-    if progress_func:
-        progress_func('p,q\n')
-    p = q = 1L
-    while number.size(p*q) < bits:
-        p = pubkey.getPrime(bits/2, randfunc)
-        q = pubkey.getPrime(bits/2, randfunc)
-
-    # p shall be smaller than q (for calc of u)
-    if p > q:
-        (p, q)=(q, p)
-    obj.p = p
-    obj.q = q
-
-    if progress_func:
-        progress_func('u\n')
-    obj.u = pubkey.inverse(obj.p, obj.q)
-    obj.n = obj.p*obj.q
-
-    obj.e = 65537L
-    if progress_func:
-        progress_func('d\n')
-    obj.d=pubkey.inverse(obj.e, (obj.p-1)*(obj.q-1))
-
-    assert bits <= 1+obj.size(), "Generated key is too small"
-
-    return obj
-
-def construct(tuple):
-    """construct(tuple:(long,) : RSAobj
-    Construct an RSA object from a 2-, 3-, 5-, or 6-tuple of numbers.
-    """
-
-    obj=RSAobj()
-    if len(tuple) not in [2,3,5,6]:
-        raise error, 'argument for construct() wrong length'
-    for i in range(len(tuple)):
-        field = obj.keydata[i]
-        setattr(obj, field, tuple[i])
-    if len(tuple) >= 5:
-        # Ensure p is smaller than q
-        if obj.p>obj.q:
-            (obj.p, obj.q)=(obj.q, obj.p)
-
-    if len(tuple) == 5:
-        # u not supplied, so we're going to have to compute it.
-        obj.u=pubkey.inverse(obj.p, obj.q)
-
-    return obj
-
-class RSAobj(pubkey.pubkey):
-    keydata = ['n', 'e', 'd', 'p', 'q', 'u']
-    def _encrypt(self, plaintext, K=''):
-        if self.n<=plaintext:
-            raise error, 'Plaintext too large'
-        return (pow(plaintext, self.e, self.n),)
-
-    def _decrypt(self, ciphertext):
-        if (not hasattr(self, 'd')):
-            raise error, 'Private key not available in this object'
-        if self.n<=ciphertext[0]:
-            raise error, 'Ciphertext too large'
-        return pow(ciphertext[0], self.d, self.n)
-
-    def _sign(self, M, K=''):
-        return (self._decrypt((M,)),)
-
-    def _verify(self, M, sig):
-        m2=self._encrypt(sig[0])
-        if m2[0]==M:
-            return 1
-        else: return 0
-
-    def _blind(self, M, B):
-        tmp = pow(B, self.e, self.n)
-        return (M * tmp) % self.n
-
-    def _unblind(self, M, B):
-        tmp = pubkey.inverse(B, self.n)
-        return  (M * tmp) % self.n
-
-    def can_blind (self):
-        """can_blind() : bool
-        Return a Boolean value recording whether this algorithm can
-        blind data.  (This does not imply that this
-        particular key object has the private information required to
-        to blind a message.)
-        """
-        return 1
-
-    def size(self):
-        """size() : int
-        Return the maximum number of bits that can be handled by this key.
-        """
-        return number.size(self.n) - 1
-
-    def has_private(self):
-        """has_private() : bool
-        Return a Boolean denoting whether the object contains
-        private components.
-        """
-        if hasattr(self, 'd'):
-            return 1
-        else: return 0
-
-    def publickey(self):
-        """publickey(): RSAobj
-        Return a new key object containing only the public key information.
-        """
-        return construct((self.n, self.e))
-
-class RSAobj_c(pubkey.pubkey):
-    keydata = ['n', 'e', 'd', 'p', 'q', 'u']
-
-    def __init__(self, key):
-        self.key = key
-
-    def __getattr__(self, attr):
-        if attr in self.keydata:
-            return getattr(self.key, attr)
-        else:
-            if self.__dict__.has_key(attr):
-                self.__dict__[attr]
-            else:
-                raise AttributeError, '%s instance has no attribute %s' % (self.__class__, attr)
-
-    def __getstate__(self):
-        d = {}
-        for k in self.keydata:
-            if hasattr(self.key, k):
-                d[k]=getattr(self.key, k)
-        return d
-
-    def __setstate__(self, state):
-        n,e = state['n'], state['e']
-        if not state.has_key('d'):
-            self.key = _fastmath.rsa_construct(n,e)
-        else:
-            d = state['d']
-            if not state.has_key('q'):
-                self.key = _fastmath.rsa_construct(n,e,d)
-            else:
-                p, q, u = state['p'], state['q'], state['u']
-                self.key = _fastmath.rsa_construct(n,e,d,p,q,u)
-
-    def _encrypt(self, plain, K):
-        return (self.key._encrypt(plain),)
-
-    def _decrypt(self, cipher):
-        return self.key._decrypt(cipher[0])
-
-    def _sign(self, M, K):
-        return (self.key._sign(M),)
-
-    def _verify(self, M, sig):
-        return self.key._verify(M, sig[0])
-
-    def _blind(self, M, B):
-        return self.key._blind(M, B)
-
-    def _unblind(self, M, B):
-        return self.key._unblind(M, B)
-
-    def can_blind (self):
-        return 1
-
-    def size(self):
-        return self.key.size()
-
-    def has_private(self):
-        return self.key.has_private()
-
-    def publickey(self):
-        return construct_c((self.key.n, self.key.e))
-
-def generate_c(bits, randfunc, progress_func = None):
-    # Generate the prime factors of n
-    if progress_func:
-        progress_func('p,q\n')
-
-    p = q = 1L
-    while number.size(p*q) < bits:
-        p = pubkey.getPrime(bits/2, randfunc)
-        q = pubkey.getPrime(bits/2, randfunc)
-
-    # p shall be smaller than q (for calc of u)
-    if p > q:
-        (p, q)=(q, p)
-    if progress_func:
-        progress_func('u\n')
-    u=pubkey.inverse(p, q)
-    n=p*q
-
-    e = 65537L
-    if progress_func:
-        progress_func('d\n')
-    d=pubkey.inverse(e, (p-1)*(q-1))
-    key = _fastmath.rsa_construct(n,e,d,p,q,u)
-    obj = RSAobj_c(key)
-
-##    print p
-##    print q
-##    print number.size(p), number.size(q), number.size(q*p),
-##    print obj.size(), bits
-    assert bits <= 1+obj.size(), "Generated key is too small"
-    return obj
-
-
-def construct_c(tuple):
-    key = apply(_fastmath.rsa_construct, tuple)
-    return RSAobj_c(key)
-
-object = RSAobj
-
-generate_py = generate
-construct_py = construct
-
-if _fastmath:
-    #print "using C version of RSA"
-    generate = generate_c
-    construct = construct_c
-    error = _fastmath.error
diff --git a/src/allmydata/Crypto/PublicKey/__init__.py b/src/allmydata/Crypto/PublicKey/__init__.py
deleted file mode 100644
index 0d4dfa39..00000000
--- a/src/allmydata/Crypto/PublicKey/__init__.py
+++ /dev/null
@@ -1,17 +0,0 @@
-"""Public-key encryption and signature algorithms.
-
-Public-key encryption uses two different keys, one for encryption and
-one for decryption.  The encryption key can be made public, and the
-decryption key is kept private.  Many public-key algorithms can also
-be used to sign messages, and some can *only* be used for signatures.
-
-Crypto.PublicKey.DSA      Digital Signature Algorithm. (Signature only)
-Crypto.PublicKey.ElGamal  (Signing and encryption)
-Crypto.PublicKey.RSA      (Signing, encryption, and blinding)
-Crypto.PublicKey.qNEW     (Signature only)
-
-"""
-
-__all__ = ['RSA']
-__revision__ = "$Id: __init__.py,v 1.4 2003/04/03 20:27:13 akuchling Exp $"
-
diff --git a/src/allmydata/Crypto/PublicKey/pubkey.py b/src/allmydata/Crypto/PublicKey/pubkey.py
deleted file mode 100644
index 091a9c91..00000000
--- a/src/allmydata/Crypto/PublicKey/pubkey.py
+++ /dev/null
@@ -1,173 +0,0 @@
-#
-#   pubkey.py : Internal functions for public key operations
-#
-#  Part of the Python Cryptography Toolkit
-#
-# Distribute and use freely; there are no restrictions on further
-# dissemination and usage except those imposed by the laws of your
-# country of residence.  This software is provided "as is" without
-# warranty of fitness for use or suitability for any purpose, express
-# or implied. Use at your own risk or not at all.
-#
-
-__revision__ = "$Id: pubkey.py,v 1.11 2003/04/03 20:36:14 akuchling Exp $"
-
-import types, warnings
-from allmydata.Crypto.Util.number import bignum, bytes_to_long, \
-     long_to_bytes, error
-
-# Basic public key class
-class pubkey:
-    def __init__(self):
-        pass
-
-    def __getstate__(self):
-        """To keep key objects platform-independent, the key data is
-        converted to standard Python long integers before being
-        written out.  It will then be reconverted as necessary on
-        restoration."""
-        d=self.__dict__
-        for key in self.keydata:
-            if d.has_key(key): d[key]=long(d[key])
-        return d
-
-    def __setstate__(self, d):
-        """On unpickling a key object, the key data is converted to the big
-number representation being used, whether that is Python long
-integers, MPZ objects, or whatever."""
-        for key in self.keydata:
-            if d.has_key(key): self.__dict__[key]=bignum(d[key])
-
-    def encrypt(self, plaintext, K):
-        """encrypt(plaintext:string|long, K:string|long) : tuple
-        Encrypt the string or integer plaintext.  K is a random
-        parameter required by some algorithms.
-        """
-        wasString=0
-        if isinstance(plaintext, types.StringType):
-            plaintext=bytes_to_long(plaintext) ; wasString=1
-        if isinstance(K, types.StringType):
-            K=bytes_to_long(K)
-        ciphertext=self._encrypt(plaintext, K)
-        if wasString: return tuple(map(long_to_bytes, ciphertext))
-        else: return ciphertext
-
-    def decrypt(self, ciphertext):
-        """decrypt(ciphertext:tuple|string|long): string
-        Decrypt 'ciphertext' using this key.
-        """
-        wasString=0
-        if not isinstance(ciphertext, types.TupleType):
-            ciphertext=(ciphertext,)
-        if isinstance(ciphertext[0], types.StringType):
-            ciphertext=tuple(map(bytes_to_long, ciphertext)) ; wasString=1
-        plaintext=self._decrypt(ciphertext)
-        if wasString: return long_to_bytes(plaintext)
-        else: return plaintext
-
-    def sign(self, M, K):
-        """sign(M : string|long, K:string|long) : tuple
-        Return a tuple containing the signature for the message M.
-        K is a random parameter required by some algorithms.
-        """
-        if (not self.has_private()):
-            raise error, 'Private key not available in this object'
-        if isinstance(M, types.StringType): M=bytes_to_long(M)
-        if isinstance(K, types.StringType): K=bytes_to_long(K)
-        return self._sign(M, K)
-
-    def verify (self, M, signature):
-        """verify(M:string|long, signature:tuple) : bool
-        Verify that the signature is valid for the message M;
-        returns true if the signature checks out.
-        """
-        if isinstance(M, types.StringType): M=bytes_to_long(M)
-        return self._verify(M, signature)
-
-    # alias to compensate for the old validate() name
-    def validate (self, M, signature):
-        warnings.warn("validate() method name is obsolete; use verify()",
-                      DeprecationWarning)
-
-    def blind(self, M, B):
-        """blind(M : string|long, B : string|long) : string|long
-        Blind message M using blinding factor B.
-        """
-        wasString=0
-        if isinstance(M, types.StringType):
-            M=bytes_to_long(M) ; wasString=1
-        if isinstance(B, types.StringType): B=bytes_to_long(B)
-        blindedmessage=self._blind(M, B)
-        if wasString: return long_to_bytes(blindedmessage)
-        else: return blindedmessage
-
-    def unblind(self, M, B):
-        """unblind(M : string|long, B : string|long) : string|long
-        Unblind message M using blinding factor B.
-        """
-        wasString=0
-        if isinstance(M, types.StringType):
-            M=bytes_to_long(M) ; wasString=1
-        if isinstance(B, types.StringType): B=bytes_to_long(B)
-        unblindedmessage=self._unblind(M, B)
-        if wasString: return long_to_bytes(unblindedmessage)
-        else: return unblindedmessage
-
-
-    # The following methods will usually be left alone, except for
-    # signature-only algorithms.  They both return Boolean values
-    # recording whether this key's algorithm can sign and encrypt.
-    def can_sign (self):
-        """can_sign() : bool
-        Return a Boolean value recording whether this algorithm can
-        generate signatures.  (This does not imply that this
-        particular key object has the private information required to
-        to generate a signature.)
-        """
-        return 1
-
-    def can_encrypt (self):
-        """can_encrypt() : bool
-        Return a Boolean value recording whether this algorithm can
-        encrypt data.  (This does not imply that this
-        particular key object has the private information required to
-        to decrypt a message.)
-        """
-        return 1
-
-    def can_blind (self):
-        """can_blind() : bool
-        Return a Boolean value recording whether this algorithm can
-        blind data.  (This does not imply that this
-        particular key object has the private information required to
-        to blind a message.)
-        """
-        return 0
-
-    # The following methods will certainly be overridden by
-    # subclasses.
-
-    def size (self):
-        """size() : int
-        Return the maximum number of bits that can be handled by this key.
-        """
-        return 0
-
-    def has_private (self):
-        """has_private() : bool
-        Return a Boolean denoting whether the object contains
-        private components.
-        """
-        return 0
-
-    def publickey (self):
-        """publickey(): object
-        Return a new key object containing only the public information.
-        """
-        return self
-
-    def __eq__ (self, other):
-        """__eq__(other): 0, 1
-        Compare us to other for equality.
-        """
-        return self.__getstate__() == other.__getstate__()
diff --git a/src/allmydata/Crypto/README b/src/allmydata/Crypto/README
index 6b4b6a0c..d5f95f63 100644
--- a/src/allmydata/Crypto/README
+++ b/src/allmydata/Crypto/README
@@ -1,7 +1,6 @@
 
 This directory contains pieces of the PyCrypto package. We've copied just the
-parts we need (AES with zooko's fast-CTR-mode patch, SHA256, Util.number, and
-eventually RSA) into the tahoe tree.
+parts we need (AES with zooko's fast-CTR-mode patch, Util.number) into the tahoe tree.
 
 
 PyCrypto is published with the following license:
diff --git a/src/allmydata/Crypto/SHA256.c b/src/allmydata/Crypto/SHA256.c
deleted file mode 100644
index 2e61f350..00000000
--- a/src/allmydata/Crypto/SHA256.c
+++ /dev/null
@@ -1,200 +0,0 @@
-/*
- * An implementation of the SHA-256 hash function, this is endian neutral
- * so should work just about anywhere.
- *
- * This code works much like the MD5 code provided by RSA.  You sha_init()
- * a "sha_state" then sha_process() the bytes you want and sha_done() to get
- * the output.
- *
- * Revised Code:  Complies to SHA-256 standard now.
- *
- * Tom St Denis -- http://tomstdenis.home.dhs.org
- * */
-#include "Python.h"
-#define MODULE_NAME SHA256
-#define DIGEST_SIZE 32
-
-typedef unsigned char U8;
-#ifdef __alpha__
-typedef    unsigned int        U32;
-#elif defined(__amd64__)
-#include <inttypes.h>
-typedef uint32_t U32;
-#else
-typedef unsigned int U32;
-#endif
-
-typedef struct {
-    U32 state[8], length, curlen;
-    unsigned char buf[64];
-}
-hash_state;
-
-/* the K array */
-static const U32 K[64] = {
-    0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL, 0x3956c25bUL,
-    0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL, 0xd807aa98UL, 0x12835b01UL,
-    0x243185beUL, 0x550c7dc3UL, 0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL,
-    0xc19bf174UL, 0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,
-    0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL, 0x983e5152UL,
-    0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL, 0xc6e00bf3UL, 0xd5a79147UL,
-    0x06ca6351UL, 0x14292967UL, 0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL,
-    0x53380d13UL, 0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,
-    0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL, 0xd192e819UL,
-    0xd6990624UL, 0xf40e3585UL, 0x106aa070UL, 0x19a4c116UL, 0x1e376c08UL,
-    0x2748774cUL, 0x34b0bcb5UL, 0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL,
-    0x682e6ff3UL, 0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,
-    0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL
-};
-
-/* Various logical functions */
-#define Ch(x,y,z)    ((x & y) ^ (~x & z))
-#define Maj(x,y,z)  ((x & y) ^ (x & z) ^ (y & z))
-#define S(x, n)        (((x)>>((n)&31))|((x)<<(32-((n)&31))))
-#define R(x, n)        ((x)>>(n))
-#define Sigma0(x)    (S(x, 2) ^ S(x, 13) ^ S(x, 22))
-#define Sigma1(x)    (S(x, 6) ^ S(x, 11) ^ S(x, 25))
-#define Gamma0(x)    (S(x, 7) ^ S(x, 18) ^ R(x, 3))
-#define Gamma1(x)    (S(x, 17) ^ S(x, 19) ^ R(x, 10))
-
-/* compress 512-bits */
-static void sha_compress(hash_state * md)
-{
-    U32 S[8], W[64], t0, t1;
-    int i;
-
-    /* copy state into S */
-    for (i = 0; i < 8; i++)
-        S[i] = md->state[i];
-
-    /* copy the state into 512-bits into W[0..15] */
-    for (i = 0; i < 16; i++)
-        W[i] = (((U32) md->buf[(4 * i) + 0]) << 24) |
-            (((U32) md->buf[(4 * i) + 1]) << 16) |
-            (((U32) md->buf[(4 * i) + 2]) << 8) |
-            (((U32) md->buf[(4 * i) + 3]));
-
-    /* fill W[16..63] */
-    for (i = 16; i < 64; i++)
-        W[i] = Gamma1(W[i - 2]) + W[i - 7] + Gamma0(W[i - 15]) + W[i - 16];
-
-    /* Compress */
-    for (i = 0; i < 64; i++) {
-        t0 = S[7] + Sigma1(S[4]) + Ch(S[4], S[5], S[6]) + K[i] + W[i];
-        t1 = Sigma0(S[0]) + Maj(S[0], S[1], S[2]);
-        S[7] = S[6];
-        S[6] = S[5];
-        S[5] = S[4];
-        S[4] = S[3] + t0;
-        S[3] = S[2];
-        S[2] = S[1];
-        S[1] = S[0];
-        S[0] = t0 + t1;
-    }
-
-    /* feedback */
-    for (i = 0; i < 8; i++)
-        md->state[i] += S[i];
-}
-
-/* init the SHA state */
-void sha_init(hash_state * md)
-{
-    md->curlen = md->length = 0;
-    md->state[0] = 0x6A09E667UL;
-    md->state[1] = 0xBB67AE85UL;
-    md->state[2] = 0x3C6EF372UL;
-    md->state[3] = 0xA54FF53AUL;
-    md->state[4] = 0x510E527FUL;
-    md->state[5] = 0x9B05688CUL;
-    md->state[6] = 0x1F83D9ABUL;
-    md->state[7] = 0x5BE0CD19UL;
-}
-
-void sha_process(hash_state * md, unsigned char *buf, int len)
-{
-    while (len--) {
-        /* copy byte */
-        md->buf[md->curlen++] = *buf++;
-
-        /* is 64 bytes full? */
-        if (md->curlen == 64) {
-            sha_compress(md);
-            md->length += 512;
-            md->curlen = 0;
-        }
-    }
-}
-
-void sha_done(hash_state * md, unsigned char *hash)
-{
-    int i;
-
-    /* increase the length of the message */
-    md->length += md->curlen * 8;
-
-    /* append the '1' bit */
-    md->buf[md->curlen++] = 0x80;
-
-    /* if the length is currenlly above 56 bytes we append zeros
-                               * then compress.  Then we can fall back to padding zeros and length
-                               * encoding like normal.
-                             */
-    if (md->curlen >= 56) {
-        for (; md->curlen < 64;)
-            md->buf[md->curlen++] = 0;
-        sha_compress(md);
-        md->curlen = 0;
-    }
-
-    /* pad upto 56 bytes of zeroes */
-    for (; md->curlen < 56;)
-        md->buf[md->curlen++] = 0;
-
-    /* since all messages are under 2^32 bits we mark the top bits zero */
-    for (i = 56; i < 60; i++)
-        md->buf[i] = 0;
-
-    /* append length */
-    for (i = 60; i < 64; i++)
-        md->buf[i] = (md->length >> ((63 - i) * 8)) & 255;
-    sha_compress(md);
-
-    /* copy output */
-    for (i = 0; i < 32; i++)
-        hash[i] = (md->state[i >> 2] >> (((3 - i) & 3) << 3)) & 255;
-}
-
-// Done
-static void hash_init (hash_state *ptr)
-{
-	sha_init(ptr);
-}
-
-// Done
-static void 
-hash_update (hash_state *self, const U8 *buf, U32 len)
-{
-	sha_process(self,(unsigned char *)buf,len);
-}
-
-// Done
-static void
-hash_copy(hash_state *src, hash_state *dest)
-{
-	memcpy(dest,src,sizeof(hash_state));
-}
-
-// Done
-static PyObject *
-hash_digest (const hash_state *self)
-{
-	unsigned char digest[32];
-	hash_state temp;
-
-	hash_copy((hash_state*)self,&temp);
-	sha_done(&temp,digest);
-	return PyString_FromStringAndSize((char *)digest, 32);
-}
-
-#include "hash_template.c"