move sha512,256 into apt-pkg/sha2.{cc,h}, move gifford implementation to sha2_internal.{cc,h}

1 files changed, 226 insertions, 1057 deletions

diff --git a/apt-pkg/contrib/sha2.cc b/apt-pkg/contrib/sha2.cc
index 810eb8317..00d90d6ba 100644
--- a/apt-pkg/contrib/sha2.cc
+++ b/apt-pkg/contrib/sha2.cc
@@ -1,1065 +1,234 @@
 /*
- * FILE:	sha2.c
- * AUTHOR:	Aaron D. Gifford - http://www.aarongifford.com/
- * 
- * Copyright (c) 2000-2001, Aaron D. Gifford
- * All rights reserved.
+ * Cryptographic API.							{{{
  *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the copyright holder nor the names of contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- * 
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTOR(S) ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTOR(S) BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
+ * SHA-512, as specified in
+ * http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf
  *
- * $Id: sha2.c,v 1.1 2001/11/08 00:01:51 adg Exp adg $
- */
-
-#include <string.h>	/* memcpy()/memset() or bcopy()/bzero() */
-#include <assert.h>	/* assert() */
-#include "sha2.h"
-
-/*
- * ASSERT NOTE:
- * Some sanity checking code is included using assert().  On my FreeBSD
- * system, this additional code can be removed by compiling with NDEBUG
- * defined.  Check your own systems manpage on assert() to see how to
- * compile WITHOUT the sanity checking code on your system.
- *
- * UNROLLED TRANSFORM LOOP NOTE:
- * You can define SHA2_UNROLL_TRANSFORM to use the unrolled transform
- * loop version for the hash transform rounds (defined using macros
- * later in this file).  Either define on the command line, for example:
- *
- *   cc -DSHA2_UNROLL_TRANSFORM -o sha2 sha2.c sha2prog.c
- *
- * or define below:
- *
- *   #define SHA2_UNROLL_TRANSFORM
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option) 
+ * any later version.
  *
- */
+ */									/*}}}*/
 
-
-/*** SHA-256/384/512 Machine Architecture Definitions *****************/
-/*
- * BYTE_ORDER NOTE:
- *
- * Please make sure that your system defines BYTE_ORDER.  If your
- * architecture is little-endian, make sure it also defines
- * LITTLE_ENDIAN and that the two (BYTE_ORDER and LITTLE_ENDIAN) are
- * equivilent.
- *
- * If your system does not define the above, then you can do so by
- * hand like this:
- *
- *   #define LITTLE_ENDIAN 1234
- *   #define BIG_ENDIAN    4321
- *
- * And for little-endian machines, add:
- *
- *   #define BYTE_ORDER LITTLE_ENDIAN 
- *
- * Or for big-endian machines:
- *
- *   #define BYTE_ORDER BIG_ENDIAN
- *
- * The FreeBSD machine this was written on defines BYTE_ORDER
- * appropriately by including <sys/types.h> (which in turn includes
- * <machine/endian.h> where the appropriate definitions are actually
- * made).
- */
-#if !defined(BYTE_ORDER) || (BYTE_ORDER != LITTLE_ENDIAN && BYTE_ORDER != BIG_ENDIAN)
-#error Define BYTE_ORDER to be equal to either LITTLE_ENDIAN or BIG_ENDIAN
+#ifdef __GNUG__
+#pragma implementation "apt-pkg/2.h"
 #endif
 
-/*
- * Define the followingsha2_* types to types of the correct length on
- * the native archtecture.   Most BSD systems and Linux define u_intXX_t
- * types.  Machines with very recent ANSI C headers, can use the
- * uintXX_t definintions from inttypes.h by defining SHA2_USE_INTTYPES_H
- * during compile or in the sha.h header file.
- *
- * Machines that support neither u_intXX_t nor inttypes.h's uintXX_t
- * will need to define these three typedefs below (and the appropriate
- * ones in sha.h too) by hand according to their system architecture.
- *
- * Thank you, Jun-ichiro itojun Hagino, for suggesting using u_intXX_t
- * types and pointing out recent ANSI C support for uintXX_t in inttypes.h.
- */
-#ifdef SHA2_USE_INTTYPES_H
-
-typedef uint8_t  sha2_byte;	/* Exactly 1 byte */
-typedef uint32_t sha2_word32;	/* Exactly 4 bytes */
-typedef uint64_t sha2_word64;	/* Exactly 8 bytes */
-
-#else /* SHA2_USE_INTTYPES_H */
-
-typedef u_int8_t  sha2_byte;	/* Exactly 1 byte */
-typedef u_int32_t sha2_word32;	/* Exactly 4 bytes */
-typedef u_int64_t sha2_word64;	/* Exactly 8 bytes */
-
-#endif /* SHA2_USE_INTTYPES_H */
-
-
-/*** SHA-256/384/512 Various Length Definitions ***********************/
-/* NOTE: Most of these are in sha2.h */
-#define SHA256_SHORT_BLOCK_LENGTH	(SHA256_BLOCK_LENGTH - 8)
-#define SHA384_SHORT_BLOCK_LENGTH	(SHA384_BLOCK_LENGTH - 16)
-#define SHA512_SHORT_BLOCK_LENGTH	(SHA512_BLOCK_LENGTH - 16)
-
-
-/*** ENDIAN REVERSAL MACROS *******************************************/
-#if BYTE_ORDER == LITTLE_ENDIAN
-#define REVERSE32(w,x)	{ \
-	sha2_word32 tmp = (w); \
-	tmp = (tmp >> 16) | (tmp << 16); \
-	(x) = ((tmp & 0xff00ff00UL) >> 8) | ((tmp & 0x00ff00ffUL) << 8); \
-}
-#define REVERSE64(w,x)	{ \
-	sha2_word64 tmp = (w); \
-	tmp = (tmp >> 32) | (tmp << 32); \
-	tmp = ((tmp & 0xff00ff00ff00ff00ULL) >> 8) | \
-	      ((tmp & 0x00ff00ff00ff00ffULL) << 8); \
-	(x) = ((tmp & 0xffff0000ffff0000ULL) >> 16) | \
-	      ((tmp & 0x0000ffff0000ffffULL) << 16); \
-}
-#endif /* BYTE_ORDER == LITTLE_ENDIAN */
-
-/*
- * Macro for incrementally adding the unsigned 64-bit integer n to the
- * unsigned 128-bit integer (represented using a two-element array of
- * 64-bit words):
- */
-#define ADDINC128(w,n)	{ \
-	(w)[0] += (sha2_word64)(n); \
-	if ((w)[0] < (n)) { \
-		(w)[1]++; \
-	} \
-}
-
-/*
- * Macros for copying blocks of memory and for zeroing out ranges
- * of memory.  Using these macros makes it easy to switch from
- * using memset()/memcpy() and using bzero()/bcopy().
- *
- * Please define either SHA2_USE_MEMSET_MEMCPY or define
- * SHA2_USE_BZERO_BCOPY depending on which function set you
- * choose to use:
- */
-#if !defined(SHA2_USE_MEMSET_MEMCPY) && !defined(SHA2_USE_BZERO_BCOPY)
-/* Default to memset()/memcpy() if no option is specified */
-#define	SHA2_USE_MEMSET_MEMCPY	1
-#endif
-#if defined(SHA2_USE_MEMSET_MEMCPY) && defined(SHA2_USE_BZERO_BCOPY)
-/* Abort with an error if BOTH options are defined */
-#error Define either SHA2_USE_MEMSET_MEMCPY or SHA2_USE_BZERO_BCOPY, not both!
-#endif
-
-#ifdef SHA2_USE_MEMSET_MEMCPY
-#define MEMSET_BZERO(p,l)	memset((p), 0, (l))
-#define MEMCPY_BCOPY(d,s,l)	memcpy((d), (s), (l))
-#endif
-#ifdef SHA2_USE_BZERO_BCOPY
-#define MEMSET_BZERO(p,l)	bzero((p), (l))
-#define MEMCPY_BCOPY(d,s,l)	bcopy((s), (d), (l))
-#endif
-
-
-/*** THE SIX LOGICAL FUNCTIONS ****************************************/
-/*
- * Bit shifting and rotation (used by the six SHA-XYZ logical functions:
- *
- *   NOTE:  The naming of R and S appears backwards here (R is a SHIFT and
- *   S is a ROTATION) because the SHA-256/384/512 description document
- *   (see http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf) uses this
- *   same "backwards" definition.
- */
-/* Shift-right (used in SHA-256, SHA-384, and SHA-512): */
-#define R(b,x) 		((x) >> (b))
-/* 32-bit Rotate-right (used in SHA-256): */
-#define S32(b,x)	(((x) >> (b)) | ((x) << (32 - (b))))
-/* 64-bit Rotate-right (used in SHA-384 and SHA-512): */
-#define S64(b,x)	(((x) >> (b)) | ((x) << (64 - (b))))
-
-/* Two of six logical functions used in SHA-256, SHA-384, and SHA-512: */
-#define Ch(x,y,z)	(((x) & (y)) ^ ((~(x)) & (z)))
-#define Maj(x,y,z)	(((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
-
-/* Four of six logical functions used in SHA-256: */
-#define Sigma0_256(x)	(S32(2,  (x)) ^ S32(13, (x)) ^ S32(22, (x)))
-#define Sigma1_256(x)	(S32(6,  (x)) ^ S32(11, (x)) ^ S32(25, (x)))
-#define sigma0_256(x)	(S32(7,  (x)) ^ S32(18, (x)) ^ R(3 ,   (x)))
-#define sigma1_256(x)	(S32(17, (x)) ^ S32(19, (x)) ^ R(10,   (x)))
-
-/* Four of six logical functions used in SHA-384 and SHA-512: */
-#define Sigma0_512(x)	(S64(28, (x)) ^ S64(34, (x)) ^ S64(39, (x)))
-#define Sigma1_512(x)	(S64(14, (x)) ^ S64(18, (x)) ^ S64(41, (x)))
-#define sigma0_512(x)	(S64( 1, (x)) ^ S64( 8, (x)) ^ R( 7,   (x)))
-#define sigma1_512(x)	(S64(19, (x)) ^ S64(61, (x)) ^ R( 6,   (x)))
-
-/*** INTERNAL FUNCTION PROTOTYPES *************************************/
-/* NOTE: These should not be accessed directly from outside this
- * library -- they are intended for private internal visibility/use
- * only.
- */
-void SHA512_Last(SHA512_CTX*);
-void SHA256_Transform(SHA256_CTX*, const sha2_word32*);
-void SHA512_Transform(SHA512_CTX*, const sha2_word64*);
-
-
-/*** SHA-XYZ INITIAL HASH VALUES AND CONSTANTS ************************/
-/* Hash constant words K for SHA-256: */
-const static sha2_word32 K256[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
-};
-
-/* Initial hash value H for SHA-256: */
-const static sha2_word32 sha256_initial_hash_value[8] = {
-	0x6a09e667UL,
-	0xbb67ae85UL,
-	0x3c6ef372UL,
-	0xa54ff53aUL,
-	0x510e527fUL,
-	0x9b05688cUL,
-	0x1f83d9abUL,
-	0x5be0cd19UL
-};
-
-/* Hash constant words K for SHA-384 and SHA-512: */
-const static sha2_word64 K512[80] = {
-	0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL,
-	0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
-	0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
-	0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
-	0xd807aa98a3030242ULL, 0x12835b0145706fbeULL,
-	0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
-	0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL,
-	0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
-	0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
-	0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
-	0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL,
-	0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
-	0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL,
-	0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
-	0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
-	0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
-	0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL,
-	0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
-	0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL,
-	0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
-	0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
-	0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
-	0xd192e819d6ef5218ULL, 0xd69906245565a910ULL,
-	0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
-	0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL,
-	0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
-	0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
-	0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
-	0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL,
-	0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
-	0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL,
-	0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
-	0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
-	0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
-	0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL,
-	0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
-	0x28db77f523047d84ULL, 0x32caab7b40c72493ULL,
-	0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
-	0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
-	0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
-};
-
-/* Initial hash value H for SHA-384 */
-const static sha2_word64 sha384_initial_hash_value[8] = {
-	0xcbbb9d5dc1059ed8ULL,
-	0x629a292a367cd507ULL,
-	0x9159015a3070dd17ULL,
-	0x152fecd8f70e5939ULL,
-	0x67332667ffc00b31ULL,
-	0x8eb44a8768581511ULL,
-	0xdb0c2e0d64f98fa7ULL,
-	0x47b5481dbefa4fa4ULL
-};
-
-/* Initial hash value H for SHA-512 */
-const static sha2_word64 sha512_initial_hash_value[8] = {
-	0x6a09e667f3bcc908ULL,
-	0xbb67ae8584caa73bULL,
-	0x3c6ef372fe94f82bULL,
-	0xa54ff53a5f1d36f1ULL,
-	0x510e527fade682d1ULL,
-	0x9b05688c2b3e6c1fULL,
-	0x1f83d9abfb41bd6bULL,
-	0x5be0cd19137e2179ULL
-};
-
-/*
- * Constant used by SHA256/384/512_End() functions for converting the
- * digest to a readable hexadecimal character string:
- */
-static const char *sha2_hex_digits = "0123456789abcdef";
-
-
-/*** SHA-256: *********************************************************/
-void SHA256_Init(SHA256_CTX* context) {
-	if (context == (SHA256_CTX*)0) {
-		return;
-	}
-	MEMCPY_BCOPY(context->state, sha256_initial_hash_value, SHA256_DIGEST_LENGTH);
-	MEMSET_BZERO(context->buffer, SHA256_BLOCK_LENGTH);
-	context->bitcount = 0;
-}
-
-#ifdef SHA2_UNROLL_TRANSFORM
-
-/* Unrolled SHA-256 round macros: */
-
-#if BYTE_ORDER == LITTLE_ENDIAN
-
-#define ROUND256_0_TO_15(a,b,c,d,e,f,g,h)	\
-	REVERSE32(*data++, W256[j]); \
-	T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + \
-             K256[j] + W256[j]; \
-	(d) += T1; \
-	(h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
-	j++
-
-
-#else /* BYTE_ORDER == LITTLE_ENDIAN */
-
-#define ROUND256_0_TO_15(a,b,c,d,e,f,g,h)	\
-	T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + \
-	     K256[j] + (W256[j] = *data++); \
-	(d) += T1; \
-	(h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
-	j++
-
-#endif /* BYTE_ORDER == LITTLE_ENDIAN */
-
-#define ROUND256(a,b,c,d,e,f,g,h)	\
-	s0 = W256[(j+1)&0x0f]; \
-	s0 = sigma0_256(s0); \
-	s1 = W256[(j+14)&0x0f]; \
-	s1 = sigma1_256(s1); \
-	T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + K256[j] + \
-	     (W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0); \
-	(d) += T1; \
-	(h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
-	j++
-
-void SHA256_Transform(SHA256_CTX* context, const sha2_word32* data) {
-	sha2_word32	a, b, c, d, e, f, g, h, s0, s1;
-	sha2_word32	T1, *W256;
-	int		j;
-
-	W256 = (sha2_word32*)context->buffer;
-
-	/* Initialize registers with the prev. intermediate value */
-	a = context->state[0];
-	b = context->state[1];
-	c = context->state[2];
-	d = context->state[3];
-	e = context->state[4];
-	f = context->state[5];
-	g = context->state[6];
-	h = context->state[7];
-
-	j = 0;
-	do {
-		/* Rounds 0 to 15 (unrolled): */
-		ROUND256_0_TO_15(a,b,c,d,e,f,g,h);
-		ROUND256_0_TO_15(h,a,b,c,d,e,f,g);
-		ROUND256_0_TO_15(g,h,a,b,c,d,e,f);
-		ROUND256_0_TO_15(f,g,h,a,b,c,d,e);
-		ROUND256_0_TO_15(e,f,g,h,a,b,c,d);
-		ROUND256_0_TO_15(d,e,f,g,h,a,b,c);
-		ROUND256_0_TO_15(c,d,e,f,g,h,a,b);
-		ROUND256_0_TO_15(b,c,d,e,f,g,h,a);
-	} while (j < 16);
-
-	/* Now for the remaining rounds to 64: */
-	do {
-		ROUND256(a,b,c,d,e,f,g,h);
-		ROUND256(h,a,b,c,d,e,f,g);
-		ROUND256(g,h,a,b,c,d,e,f);
-		ROUND256(f,g,h,a,b,c,d,e);
-		ROUND256(e,f,g,h,a,b,c,d);
-		ROUND256(d,e,f,g,h,a,b,c);
-		ROUND256(c,d,e,f,g,h,a,b);
-		ROUND256(b,c,d,e,f,g,h,a);
-	} while (j < 64);
-
-	/* Compute the current intermediate hash value */
-	context->state[0] += a;
-	context->state[1] += b;
-	context->state[2] += c;
-	context->state[3] += d;
-	context->state[4] += e;
-	context->state[5] += f;
-	context->state[6] += g;
-	context->state[7] += h;
-
-	/* Clean up */
-	a = b = c = d = e = f = g = h = T1 = 0;
-}
-
-#else /* SHA2_UNROLL_TRANSFORM */
-
-void SHA256_Transform(SHA256_CTX* context, const sha2_word32* data) {
-	sha2_word32	a, b, c, d, e, f, g, h, s0, s1;
-	sha2_word32	T1, T2, *W256;
-	int		j;
-
-	W256 = (sha2_word32*)context->buffer;
-
-	/* Initialize registers with the prev. intermediate value */
-	a = context->state[0];
-	b = context->state[1];
-	c = context->state[2];
-	d = context->state[3];
-	e = context->state[4];
-	f = context->state[5];
-	g = context->state[6];
-	h = context->state[7];
-
-	j = 0;
-	do {
-#if BYTE_ORDER == LITTLE_ENDIAN
-		/* Copy data while converting to host byte order */
-		REVERSE32(*data++,W256[j]);
-		/* Apply the SHA-256 compression function to update a..h */
-		T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + W256[j];
-#else /* BYTE_ORDER == LITTLE_ENDIAN */
-		/* Apply the SHA-256 compression function to update a..h with copy */
-		T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + (W256[j] = *data++);
-#endif /* BYTE_ORDER == LITTLE_ENDIAN */
-		T2 = Sigma0_256(a) + Maj(a, b, c);
-		h = g;
-		g = f;
-		f = e;
-		e = d + T1;
-		d = c;
-		c = b;
-		b = a;
-		a = T1 + T2;
-
-		j++;
-	} while (j < 16);
-
-	do {
-		/* Part of the message block expansion: */
-		s0 = W256[(j+1)&0x0f];
-		s0 = sigma0_256(s0);
-		s1 = W256[(j+14)&0x0f];	
-		s1 = sigma1_256(s1);
-
-		/* Apply the SHA-256 compression function to update a..h */
-		T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + 
-		     (W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0);
-		T2 = Sigma0_256(a) + Maj(a, b, c);
-		h = g;
-		g = f;
-		f = e;
-		e = d + T1;
-		d = c;
-		c = b;
-		b = a;
-		a = T1 + T2;
-
-		j++;
-	} while (j < 64);
-
-	/* Compute the current intermediate hash value */
-	context->state[0] += a;
-	context->state[1] += b;
-	context->state[2] += c;
-	context->state[3] += d;
-	context->state[4] += e;
-	context->state[5] += f;
-	context->state[6] += g;
-	context->state[7] += h;
-
-	/* Clean up */
-	a = b = c = d = e = f = g = h = T1 = T2 = 0;
-}
-
-#endif /* SHA2_UNROLL_TRANSFORM */
-
-void SHA256_Update(SHA256_CTX* context, const sha2_byte *data, size_t len) {
-	unsigned int	freespace, usedspace;
-
-	if (len == 0) {
-		/* Calling with no data is valid - we do nothing */
-		return;
-	}
-
-	/* Sanity check: */
-	assert(context != (SHA256_CTX*)0 && data != (sha2_byte*)0);
-
-	usedspace = (context->bitcount >> 3) % SHA256_BLOCK_LENGTH;
-	if (usedspace > 0) {
-		/* Calculate how much free space is available in the buffer */
-		freespace = SHA256_BLOCK_LENGTH - usedspace;
-
-		if (len >= freespace) {
-			/* Fill the buffer completely and process it */
-			MEMCPY_BCOPY(&context->buffer[usedspace], data, freespace);
-			context->bitcount += freespace << 3;
-			len -= freespace;
-			data += freespace;
-			SHA256_Transform(context, (sha2_word32*)context->buffer);
-		} else {
-			/* The buffer is not yet full */
-			MEMCPY_BCOPY(&context->buffer[usedspace], data, len);
-			context->bitcount += len << 3;
-			/* Clean up: */
-			usedspace = freespace = 0;
-			return;
-		}
-	}
-	while (len >= SHA256_BLOCK_LENGTH) {
-		/* Process as many complete blocks as we can */
-		SHA256_Transform(context, (sha2_word32*)data);
-		context->bitcount += SHA256_BLOCK_LENGTH << 3;
-		len -= SHA256_BLOCK_LENGTH;
-		data += SHA256_BLOCK_LENGTH;
-	}
-	if (len > 0) {
-		/* There's left-overs, so save 'em */
-		MEMCPY_BCOPY(context->buffer, data, len);
-		context->bitcount += len << 3;
-	}
-	/* Clean up: */
-	usedspace = freespace = 0;
-}
-
-void SHA256_Final(sha2_byte digest[], SHA256_CTX* context) {
-	sha2_word32	*d = (sha2_word32*)digest;
-	unsigned int	usedspace;
-
-	/* Sanity check: */
-	assert(context != (SHA256_CTX*)0);
-
-	/* If no digest buffer is passed, we don't bother doing this: */
-	if (digest != (sha2_byte*)0) {
-		usedspace = (context->bitcount >> 3) % SHA256_BLOCK_LENGTH;
-#if BYTE_ORDER == LITTLE_ENDIAN
-		/* Convert FROM host byte order */
-		REVERSE64(context->bitcount,context->bitcount);
-#endif
-		if (usedspace > 0) {
-			/* Begin padding with a 1 bit: */
-			context->buffer[usedspace++] = 0x80;
-
-			if (usedspace <= SHA256_SHORT_BLOCK_LENGTH) {
-				/* Set-up for the last transform: */
-				MEMSET_BZERO(&context->buffer[usedspace], SHA256_SHORT_BLOCK_LENGTH - usedspace);
-			} else {
-				if (usedspace < SHA256_BLOCK_LENGTH) {
-					MEMSET_BZERO(&context->buffer[usedspace], SHA256_BLOCK_LENGTH - usedspace);
-				}
-				/* Do second-to-last transform: */
-				SHA256_Transform(context, (sha2_word32*)context->buffer);
-
-				/* And set-up for the last transform: */
-				MEMSET_BZERO(context->buffer, SHA256_SHORT_BLOCK_LENGTH);
-			}
-		} else {
-			/* Set-up for the last transform: */
-			MEMSET_BZERO(context->buffer, SHA256_SHORT_BLOCK_LENGTH);
-
-			/* Begin padding with a 1 bit: */
-			*context->buffer = 0x80;
-		}
-		/* Set the bit count: */
-		*(sha2_word64*)&context->buffer[SHA256_SHORT_BLOCK_LENGTH] = context->bitcount;
-
-		/* Final transform: */
-		SHA256_Transform(context, (sha2_word32*)context->buffer);
-
-#if BYTE_ORDER == LITTLE_ENDIAN
-		{
-			/* Convert TO host byte order */
-			int	j;
-			for (j = 0; j < 8; j++) {
-				REVERSE32(context->state[j],context->state[j]);
-				*d++ = context->state[j];
-			}
-		}
-#else
-		MEMCPY_BCOPY(d, context->state, SHA256_DIGEST_LENGTH);
-#endif
-	}
-
-	/* Clean up state data: */
-	MEMSET_BZERO(context, sizeof(context));
-	usedspace = 0;
-}
-
-char *SHA256_End(SHA256_CTX* context, char buffer[]) {
-	sha2_byte	digest[SHA256_DIGEST_LENGTH], *d = digest;
-	int		i;
-
-	/* Sanity check: */
-	assert(context != (SHA256_CTX*)0);
-
-	if (buffer != (char*)0) {
-		SHA256_Final(digest, context);
-
-		for (i = 0; i < SHA256_DIGEST_LENGTH; i++) {
-			*buffer++ = sha2_hex_digits[(*d & 0xf0) >> 4];
-			*buffer++ = sha2_hex_digits[*d & 0x0f];
-			d++;
-		}
-		*buffer = (char)0;
-	} else {
-		MEMSET_BZERO(context, sizeof(context));
-	}
-	MEMSET_BZERO(digest, SHA256_DIGEST_LENGTH);
-	return buffer;
-}
-
-char* SHA256_Data(const sha2_byte* data, size_t len, char digest[SHA256_DIGEST_STRING_LENGTH]) {
-	SHA256_CTX	context;
-
-	SHA256_Init(&context);
-	SHA256_Update(&context, data, len);
-	return SHA256_End(&context, digest);
-}
-
-
-/*** SHA-512: *********************************************************/
-void SHA512_Init(SHA512_CTX* context) {
-	if (context == (SHA512_CTX*)0) {
-		return;
-	}
-	MEMCPY_BCOPY(context->state, sha512_initial_hash_value, SHA512_DIGEST_LENGTH);
-	MEMSET_BZERO(context->buffer, SHA512_BLOCK_LENGTH);
-	context->bitcount[0] = context->bitcount[1] =  0;
-}
-
-#ifdef SHA2_UNROLL_TRANSFORM
-
-/* Unrolled SHA-512 round macros: */
-#if BYTE_ORDER == LITTLE_ENDIAN
-
-#define ROUND512_0_TO_15(a,b,c,d,e,f,g,h)	\
-	REVERSE64(*data++, W512[j]); \
-	T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + \
-             K512[j] + W512[j]; \
-	(d) += T1, \
-	(h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)), \
-	j++
-
-
-#else /* BYTE_ORDER == LITTLE_ENDIAN */
-
-#define ROUND512_0_TO_15(a,b,c,d,e,f,g,h)	\
-	T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + \
-             K512[j] + (W512[j] = *data++); \
-	(d) += T1; \
-	(h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \
-	j++
-
-#endif /* BYTE_ORDER == LITTLE_ENDIAN */
-
-#define ROUND512(a,b,c,d,e,f,g,h)	\
-	s0 = W512[(j+1)&0x0f]; \
-	s0 = sigma0_512(s0); \
-	s1 = W512[(j+14)&0x0f]; \
-	s1 = sigma1_512(s1); \
-	T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + K512[j] + \
-             (W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0); \
-	(d) += T1; \
-	(h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \
-	j++
-
-void SHA512_Transform(SHA512_CTX* context, const sha2_word64* data) {
-	sha2_word64	a, b, c, d, e, f, g, h, s0, s1;
-	sha2_word64	T1, *W512 = (sha2_word64*)context->buffer;
-	int		j;
-
-	/* Initialize registers with the prev. intermediate value */
-	a = context->state[0];
-	b = context->state[1];
-	c = context->state[2];
-	d = context->state[3];
-	e = context->state[4];
-	f = context->state[5];
-	g = context->state[6];
-	h = context->state[7];
-
-	j = 0;
-	do {
-		ROUND512_0_TO_15(a,b,c,d,e,f,g,h);
-		ROUND512_0_TO_15(h,a,b,c,d,e,f,g);
-		ROUND512_0_TO_15(g,h,a,b,c,d,e,f);
-		ROUND512_0_TO_15(f,g,h,a,b,c,d,e);
-		ROUND512_0_TO_15(e,f,g,h,a,b,c,d);
-		ROUND512_0_TO_15(d,e,f,g,h,a,b,c);
-		ROUND512_0_TO_15(c,d,e,f,g,h,a,b);
-		ROUND512_0_TO_15(b,c,d,e,f,g,h,a);
-	} while (j < 16);
-
-	/* Now for the remaining rounds up to 79: */
-	do {
-		ROUND512(a,b,c,d,e,f,g,h);
-		ROUND512(h,a,b,c,d,e,f,g);
-		ROUND512(g,h,a,b,c,d,e,f);
-		ROUND512(f,g,h,a,b,c,d,e);
-		ROUND512(e,f,g,h,a,b,c,d);
-		ROUND512(d,e,f,g,h,a,b,c);
-		ROUND512(c,d,e,f,g,h,a,b);
-		ROUND512(b,c,d,e,f,g,h,a);
-	} while (j < 80);
-
-	/* Compute the current intermediate hash value */
-	context->state[0] += a;
-	context->state[1] += b;
-	context->state[2] += c;
-	context->state[3] += d;
-	context->state[4] += e;
-	context->state[5] += f;
-	context->state[6] += g;
-	context->state[7] += h;
-
-	/* Clean up */
-	a = b = c = d = e = f = g = h = T1 = 0;
-}
-
-#else /* SHA2_UNROLL_TRANSFORM */
-
-void SHA512_Transform(SHA512_CTX* context, const sha2_word64* data) {
-	sha2_word64	a, b, c, d, e, f, g, h, s0, s1;
-	sha2_word64	T1, T2, *W512 = (sha2_word64*)context->buffer;
-	int		j;
-
-	/* Initialize registers with the prev. intermediate value */
-	a = context->state[0];
-	b = context->state[1];
-	c = context->state[2];
-	d = context->state[3];
-	e = context->state[4];
-	f = context->state[5];
-	g = context->state[6];
-	h = context->state[7];
-
-	j = 0;
-	do {
-#if BYTE_ORDER == LITTLE_ENDIAN
-		/* Convert TO host byte order */
-		REVERSE64(*data++, W512[j]);
-		/* Apply the SHA-512 compression function to update a..h */
-		T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + W512[j];
-#else /* BYTE_ORDER == LITTLE_ENDIAN */
-		/* Apply the SHA-512 compression function to update a..h with copy */
-		T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + (W512[j] = *data++);
-#endif /* BYTE_ORDER == LITTLE_ENDIAN */
-		T2 = Sigma0_512(a) + Maj(a, b, c);
-		h = g;
-		g = f;
-		f = e;
-		e = d + T1;
-		d = c;
-		c = b;
-		b = a;
-		a = T1 + T2;
-
-		j++;
-	} while (j < 16);
-
-	do {
-		/* Part of the message block expansion: */
-		s0 = W512[(j+1)&0x0f];
-		s0 = sigma0_512(s0);
-		s1 = W512[(j+14)&0x0f];
-		s1 =  sigma1_512(s1);
-
-		/* Apply the SHA-512 compression function to update a..h */
-		T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] +
-		     (W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0);
-		T2 = Sigma0_512(a) + Maj(a, b, c);
-		h = g;
-		g = f;
-		f = e;
-		e = d + T1;
-		d = c;
-		c = b;
-		b = a;
-		a = T1 + T2;
-
-		j++;
-	} while (j < 80);
-
-	/* Compute the current intermediate hash value */
-	context->state[0] += a;
-	context->state[1] += b;
-	context->state[2] += c;
-	context->state[3] += d;
-	context->state[4] += e;
-	context->state[5] += f;
-	context->state[6] += g;
-	context->state[7] += h;
-
-	/* Clean up */
-	a = b = c = d = e = f = g = h = T1 = T2 = 0;
-}
-
-#endif /* SHA2_UNROLL_TRANSFORM */
-
-void SHA512_Update(SHA512_CTX* context, const sha2_byte *data, size_t len) {
-	unsigned int	freespace, usedspace;
-
-	if (len == 0) {
-		/* Calling with no data is valid - we do nothing */
-		return;
-	}
-
-	/* Sanity check: */
-	assert(context != (SHA512_CTX*)0 && data != (sha2_byte*)0);
-
-	usedspace = (context->bitcount[0] >> 3) % SHA512_BLOCK_LENGTH;
-	if (usedspace > 0) {
-		/* Calculate how much free space is available in the buffer */
-		freespace = SHA512_BLOCK_LENGTH - usedspace;
-
-		if (len >= freespace) {
-			/* Fill the buffer completely and process it */
-			MEMCPY_BCOPY(&context->buffer[usedspace], data, freespace);
-			ADDINC128(context->bitcount, freespace << 3);
-			len -= freespace;
-			data += freespace;
-			SHA512_Transform(context, (sha2_word64*)context->buffer);
-		} else {
-			/* The buffer is not yet full */
-			MEMCPY_BCOPY(&context->buffer[usedspace], data, len);
-			ADDINC128(context->bitcount, len << 3);
-			/* Clean up: */
-			usedspace = freespace = 0;
-			return;
-		}
-	}
-	while (len >= SHA512_BLOCK_LENGTH) {
-		/* Process as many complete blocks as we can */
-		SHA512_Transform(context, (sha2_word64*)data);
-		ADDINC128(context->bitcount, SHA512_BLOCK_LENGTH << 3);
-		len -= SHA512_BLOCK_LENGTH;
-		data += SHA512_BLOCK_LENGTH;
-	}
-	if (len > 0) {
-		/* There's left-overs, so save 'em */
-		MEMCPY_BCOPY(context->buffer, data, len);
-		ADDINC128(context->bitcount, len << 3);
-	}
-	/* Clean up: */
-	usedspace = freespace = 0;
-}
-
-void SHA512_Last(SHA512_CTX* context) {
-	unsigned int	usedspace;
-
-	usedspace = (context->bitcount[0] >> 3) % SHA512_BLOCK_LENGTH;
-#if BYTE_ORDER == LITTLE_ENDIAN
-	/* Convert FROM host byte order */
-	REVERSE64(context->bitcount[0],context->bitcount[0]);
-	REVERSE64(context->bitcount[1],context->bitcount[1]);
-#endif
-	if (usedspace > 0) {
-		/* Begin padding with a 1 bit: */
-		context->buffer[usedspace++] = 0x80;
-
-		if (usedspace <= SHA512_SHORT_BLOCK_LENGTH) {
-			/* Set-up for the last transform: */
-			MEMSET_BZERO(&context->buffer[usedspace], SHA512_SHORT_BLOCK_LENGTH - usedspace);
-		} else {
-			if (usedspace < SHA512_BLOCK_LENGTH) {
-				MEMSET_BZERO(&context->buffer[usedspace], SHA512_BLOCK_LENGTH - usedspace);
-			}
-			/* Do second-to-last transform: */
-			SHA512_Transform(context, (sha2_word64*)context->buffer);
-
-			/* And set-up for the last transform: */
-			MEMSET_BZERO(context->buffer, SHA512_BLOCK_LENGTH - 2);
-		}
-	} else {
-		/* Prepare for final transform: */
-		MEMSET_BZERO(context->buffer, SHA512_SHORT_BLOCK_LENGTH);
-
-		/* Begin padding with a 1 bit: */
-		*context->buffer = 0x80;
-	}
-	/* Store the length of input data (in bits): */
-	*(sha2_word64*)&context->buffer[SHA512_SHORT_BLOCK_LENGTH] = context->bitcount[1];
-	*(sha2_word64*)&context->buffer[SHA512_SHORT_BLOCK_LENGTH+8] = context->bitcount[0];
-
-	/* Final transform: */
-	SHA512_Transform(context, (sha2_word64*)context->buffer);
-}
-
-void SHA512_Final(sha2_byte digest[], SHA512_CTX* context) {
-	sha2_word64	*d = (sha2_word64*)digest;
-
-	/* Sanity check: */
-	assert(context != (SHA512_CTX*)0);
-
-	/* If no digest buffer is passed, we don't bother doing this: */
-	if (digest != (sha2_byte*)0) {
-		SHA512_Last(context);
-
-		/* Save the hash data for output: */
-#if BYTE_ORDER == LITTLE_ENDIAN
-		{
-			/* Convert TO host byte order */
-			int	j;
-			for (j = 0; j < 8; j++) {
-				REVERSE64(context->state[j],context->state[j]);
-				*d++ = context->state[j];
-			}
-		}
-#else
-		MEMCPY_BCOPY(d, context->state, SHA512_DIGEST_LENGTH);
-#endif
-	}
-
-	/* Zero out state data */
-	MEMSET_BZERO(context, sizeof(context));
-}
-
-char *SHA512_End(SHA512_CTX* context, char buffer[]) {
-	sha2_byte	digest[SHA512_DIGEST_LENGTH], *d = digest;
-	int		i;
-
-	/* Sanity check: */
-	assert(context != (SHA512_CTX*)0);
-
-	if (buffer != (char*)0) {
-		SHA512_Final(digest, context);
-
-		for (i = 0; i < SHA512_DIGEST_LENGTH; i++) {
-			*buffer++ = sha2_hex_digits[(*d & 0xf0) >> 4];
-			*buffer++ = sha2_hex_digits[*d & 0x0f];
-			d++;
-		}
-		*buffer = (char)0;
-	} else {
-		MEMSET_BZERO(context, sizeof(context));
-	}
-	MEMSET_BZERO(digest, SHA512_DIGEST_LENGTH);
-	return buffer;
-}
-
-char* SHA512_Data(const sha2_byte* data, size_t len, char digest[SHA512_DIGEST_STRING_LENGTH]) {
-	SHA512_CTX	context;
-
-	SHA512_Init(&context);
-	SHA512_Update(&context, data, len);
-	return SHA512_End(&context, digest);
-}
-
-
-/*** SHA-384: *********************************************************/
-void SHA384_Init(SHA384_CTX* context) {
-	if (context == (SHA384_CTX*)0) {
-		return;
-	}
-	MEMCPY_BCOPY(context->state, sha384_initial_hash_value, SHA512_DIGEST_LENGTH);
-	MEMSET_BZERO(context->buffer, SHA384_BLOCK_LENGTH);
-	context->bitcount[0] = context->bitcount[1] = 0;
-}
-
-void SHA384_Update(SHA384_CTX* context, const sha2_byte* data, size_t len) {
-	SHA512_Update((SHA512_CTX*)context, data, len);
-}
-
-void SHA384_Final(sha2_byte digest[], SHA384_CTX* context) {
-	sha2_word64	*d = (sha2_word64*)digest;
-
-	/* Sanity check: */
-	assert(context != (SHA384_CTX*)0);
-
-	/* If no digest buffer is passed, we don't bother doing this: */
-	if (digest != (sha2_byte*)0) {
-		SHA512_Last((SHA512_CTX*)context);
-
-		/* Save the hash data for output: */
-#if BYTE_ORDER == LITTLE_ENDIAN
-		{
-			/* Convert TO host byte order */
-			int	j;
-			for (j = 0; j < 6; j++) {
-				REVERSE64(context->state[j],context->state[j]);
-				*d++ = context->state[j];
-			}
-		}
-#else
-		MEMCPY_BCOPY(d, context->state, SHA384_DIGEST_LENGTH);
-#endif
-	}
-
-	/* Zero out state data */
-	MEMSET_BZERO(context, sizeof(context));
-}
-
-char *SHA384_End(SHA384_CTX* context, char buffer[]) {
-	sha2_byte	digest[SHA384_DIGEST_LENGTH], *d = digest;
-	int		i;
-
-	/* Sanity check: */
-	assert(context != (SHA384_CTX*)0);
-
-	if (buffer != (char*)0) {
-		SHA384_Final(digest, context);
-
-		for (i = 0; i < SHA384_DIGEST_LENGTH; i++) {
-			*buffer++ = sha2_hex_digits[(*d & 0xf0) >> 4];
-			*buffer++ = sha2_hex_digits[*d & 0x0f];
-			d++;
-		}
-		*buffer = (char)0;
-	} else {
-		MEMSET_BZERO(context, sizeof(context));
-	}
-	MEMSET_BZERO(digest, SHA384_DIGEST_LENGTH);
-	return buffer;
-}
-
-char* SHA384_Data(const sha2_byte* data, size_t len, char digest[SHA384_DIGEST_STRING_LENGTH]) {
-	SHA384_CTX	context;
-
-	SHA384_Init(&context);
-	SHA384_Update(&context, data, len);
-	return SHA384_End(&context, digest);
-}
+#include <apt-pkg/sha2.h>
+#include <apt-pkg/strutl.h>
+
+SHA512Summation::SHA512Summation()					/*{{{*/
+{
+   SHA512_Init(&ctx);
+   Done = false;
+}
+									/*}}}*/
+bool SHA512Summation::Add(const unsigned char *inbuf,unsigned long len) /*{{{*/
+{
+   if (Done) 
+      return false;
+   SHA512_Update(&ctx, inbuf, len);
+   return true;
+}
+									/*}}}*/
+SHA512SumValue SHA512Summation::Result()				/*{{{*/
+{
+   if (!Done) {
+      SHA512_Final(Sum, &ctx);
+      Done = true;
+   }
+
+   SHA512SumValue res;
+   res.Set(Sum);
+   return res;
+}
+									/*}}}*/
+// SHA512SumValue::SHA512SumValue - Constructs the sum from a string   /*{{{*/
+// ---------------------------------------------------------------------
+/* The string form of a SHA512 is a 64 character hex number */
+SHA512SumValue::SHA512SumValue(string Str)
+{
+   memset(Sum,0,sizeof(Sum));
+   Set(Str);
+}
+                                                                       /*}}}*/
+// SHA512SumValue::SHA512SumValue - Default constructor                /*{{{*/
+// ---------------------------------------------------------------------
+/* Sets the value to 0 */
+SHA512SumValue::SHA512SumValue()
+{
+   memset(Sum,0,sizeof(Sum));
+}
+                                                                       /*}}}*/
+// SHA512SumValue::Set - Set the sum from a string                     /*{{{*/
+// ---------------------------------------------------------------------
+/* Converts the hex string into a set of chars */
+bool SHA512SumValue::Set(string Str)
+{
+   return Hex2Num(Str,Sum,sizeof(Sum));
+}
+                                                                       /*}}}*/
+// SHA512SumValue::Value - Convert the number into a string            /*{{{*/
+// ---------------------------------------------------------------------
+/* Converts the set of chars into a hex string in lower case */
+string SHA512SumValue::Value() const
+{
+   char Conv[16] =
+      { '0','1','2','3','4','5','6','7','8','9','a','b',
+      'c','d','e','f'
+   };
+   char Result[129];
+   Result[128] = 0;
+
+   // Convert each char into two letters
+   int J = 0;
+   int I = 0;
+   for (; I != 128; J++,I += 2)
+   {
+      Result[I] = Conv[Sum[J] >> 4];
+      Result[I + 1] = Conv[Sum[J] & 0xF];
+   }
+
+   return string(Result);
+}
+									/*}}}*/
+// SHA512SumValue::operator == - Comparator                            /*{{{*/
+// ---------------------------------------------------------------------
+/* Call memcmp on the buffer */
+bool SHA512SumValue::operator == (const SHA512SumValue & rhs) const
+{
+   return memcmp(Sum,rhs.Sum,sizeof(Sum)) == 0;
+}
+                                                                       /*}}}*/
+// SHA512Summation::AddFD - Add content of file into the checksum      /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool SHA512Summation::AddFD(int Fd,unsigned long Size)
+{
+   unsigned char Buf[64 * 64];
+   int Res = 0;
+   int ToEOF = (Size == 0);
+   while (Size != 0 || ToEOF)
+   {
+      unsigned n = sizeof(Buf);
+      if (!ToEOF) n = min(Size,(unsigned long)n);
+      Res = read(Fd,Buf,n);
+      if (Res < 0 || (!ToEOF && (unsigned) Res != n)) // error, or short read
+         return false;
+      if (ToEOF && Res == 0) // EOF
+         break;
+      Size -= Res;
+      Add(Buf,Res);
+   }
+   return true;
+}
+                                                                       /*}}}*/
+
+SHA256Summation::SHA256Summation()					/*{{{*/
+{
+   SHA256_Init(&ctx);
+   Done = false;
+}
+									/*}}}*/
+bool SHA256Summation::Add(const unsigned char *inbuf,unsigned long len) /*{{{*/
+{
+   if (Done) 
+      return false;
+   SHA256_Update(&ctx, inbuf, len);
+   return true;
+}
+									/*}}}*/
+SHA256SumValue SHA256Summation::Result()				/*{{{*/
+{
+   if (!Done) {
+      SHA256_Final(Sum, &ctx);
+      Done = true;
+   }
+
+   SHA256SumValue res;
+   res.Set(Sum);
+   return res;
+}
+									/*}}}*/
+// SHA256SumValue::SHA256SumValue - Constructs the sum from a string   /*{{{*/
+// ---------------------------------------------------------------------
+/* The string form of a SHA512 is a 64 character hex number */
+SHA256SumValue::SHA256SumValue(string Str)
+{
+   memset(Sum,0,sizeof(Sum));
+   Set(Str);
+}
+                                                                       /*}}}*/
+// SHA256SumValue::SHA256SumValue - Default constructor                /*{{{*/
+// ---------------------------------------------------------------------
+/* Sets the value to 0 */
+SHA256SumValue::SHA256SumValue()
+{
+   memset(Sum,0,sizeof(Sum));
+}
+                                                                       /*}}}*/
+// SHA256SumValue::Set - Set the sum from a string                     /*{{{*/
+// ---------------------------------------------------------------------
+/* Converts the hex string into a set of chars */
+bool SHA256SumValue::Set(string Str)
+{
+   return Hex2Num(Str,Sum,sizeof(Sum));
+}
+                                                                       /*}}}*/
+// SHA256SumValue::Value - Convert the number into a string            /*{{{*/
+// ---------------------------------------------------------------------
+/* Converts the set of chars into a hex string in lower case */
+string SHA256SumValue::Value() const
+{
+   char Conv[16] =
+      { '0','1','2','3','4','5','6','7','8','9','a','b',
+      'c','d','e','f'
+   };
+   char Result[129];
+   Result[128] = 0;
+
+   // Convert each char into two letters
+   int J = 0;
+   int I = 0;
+   for (; I != 128; J++,I += 2)
+   {
+      Result[I] = Conv[Sum[J] >> 4];
+      Result[I + 1] = Conv[Sum[J] & 0xF];
+   }
+
+   return string(Result);
+}
+									/*}}}*/
+// SHA256SumValue::operator == - Comparator                            /*{{{*/
+// ---------------------------------------------------------------------
+/* Call memcmp on the buffer */
+bool SHA256SumValue::operator == (const SHA256SumValue & rhs) const
+{
+   return memcmp(Sum,rhs.Sum,sizeof(Sum)) == 0;
+}
+                                                                       /*}}}*/
+// SHA256Summation::AddFD - Add content of file into the checksum      /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool SHA256Summation::AddFD(int Fd,unsigned long Size)
+{
+   unsigned char Buf[64 * 64];
+   int Res = 0;
+   int ToEOF = (Size == 0);
+   while (Size != 0 || ToEOF)
+   {
+      unsigned n = sizeof(Buf);
+      if (!ToEOF) n = min(Size,(unsigned long)n);
+      Res = read(Fd,Buf,n);
+      if (Res < 0 || (!ToEOF && (unsigned) Res != n)) // error, or short read
+         return false;
+      if (ToEOF && Res == 0) // EOF
+         break;
+      Size -= Res;
+      Add(Buf,Res);
+   }
+   return true;
+}
+                                                                       /*}}}*/