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Add SHA-224 support

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This commit is contained in:
David Shaw 2006-04-20 02:05:32 +00:00
parent 36ce455f15
commit f0902a6aef
6 changed files with 90 additions and 7 deletions
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6
cipher/ChangeLog
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@ -1,3 +1,9 @@
2006-04-19 David Shaw <dshaw@jabberwocky.com>
* sha256.c (sha224_get_info, sha224_init): New init functions for
the 224-bit variant of SHA-256.
* algorithms.h, md.c (load_digest_module): Call them here.
2006-03-20 David Shaw <dshaw@jabberwocky.com>
* blowfish.c, md5.c, rmd160.c, sha1.c, sha256.c, sha512.c: Revert

11
cipher/algorithms.h
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@ -1,5 +1,5 @@
/* algorithms.h - prototypes for algorithm functions.
* Copyright (C) 2002 Free Software Foundation, Inc.
* Copyright (C) 2002, 2003, 2006 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
@ -51,6 +51,15 @@ sha1_get_info (int algo, size_t *contextsize,
byte *(**r_read)( void *c )
);
const char *
sha224_get_info (int algo, size_t *contextsize,
byte **r_asnoid, int *r_asnlen, int *r_mdlen,
void (**r_init)( void *c ),
void (**r_write)( void *c, byte *buf, size_t nbytes ),
void (**r_final)( void *c ),
byte *(**r_read)( void *c )
);
const char *
sha256_get_info (int algo, size_t *contextsize,
byte **r_asnoid, int *r_asnlen, int *r_mdlen,

4
cipher/md.c
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@ -1,5 +1,5 @@
/* md.c - message digest dispatcher
* Copyright (C) 1998, 1999, 2002, 2003 Free Software Foundation, Inc.
* Copyright (C) 1998, 1999, 2002, 2003, 2006 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
@ -106,6 +106,8 @@ load_digest_module (void)
#ifdef USE_SHA256
if (!new_list_item (DIGEST_ALGO_SHA256, sha256_get_info))
BUG ();
if (!new_list_item (DIGEST_ALGO_SHA224, sha224_get_info))
BUG ();
#endif
if (!new_list_item (DIGEST_ALGO_MD5, md5_get_info))
BUG ();

67
cipher/sha256.c
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@ -1,5 +1,5 @@
/* sha256.c - SHA256 hash function
* Copyright (C) 2003 Free Software Foundation, Inc.
/* sha256.c - SHA224 and SHA256 hash functions
* Copyright (C) 2003, 2006 Free Software Foundation, Inc.
*
* Please see below for more legal information!
*
@ -25,12 +25,21 @@
/* Test vectors from FIPS-180-2:
*
* "abc"
* 224:
* 23097D22 3405D822 8642A477 BDA255B3 2AADBCE4 BDA0B3F7 E36C9DA7
* 256:
* BA7816BF 8F01CFEA 414140DE 5DAE2223 B00361A3 96177A9C B410FF61 F20015AD
*
* "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
* 224:
* 75388B16 512776CC 5DBA5DA1 FD890150 B0C6455C B4F58B19 52522525
* 256:
* 248D6A61 D20638B8 E5C02693 0C3E6039 A33CE459 64FF2167 F6ECEDD4 19DB06C1
*
* "a" x 1000000
* 224:
* 20794655 980C91D8 BBB4C1EA 97618A4B F03F4258 1948B2EE 4EE7AD67
* 256:
* CDC76E5C 9914FB92 81A1C7E2 84D73E67 F1809A48 A497200E 046D39CC C7112CD0
*/
@ -76,6 +85,22 @@ sha256_init( SHA256_CONTEXT *hd )
hd->count = 0;
}
void
sha224_init( SHA256_CONTEXT *hd )
{
hd->h0 = 0xc1059ed8;
hd->h1 = 0x367cd507;
hd->h2 = 0x3070dd17;
hd->h3 = 0xf70e5939;
hd->h4 = 0xffc00b31;
hd->h5 = 0x68581511;
hd->h6 = 0x64f98fa7;
hd->h7 = 0xbefa4fa4;
hd->nblocks = 0;
hd->count = 0;
}
/****************
* Transform the message w which consists of 16 32-bit words
@ -207,7 +232,8 @@ sha256_write( SHA256_CONTEXT *hd, byte *inbuf, size_t inlen)
* returns the digest.
* The handle is prepared for a new cycle, but adding bytes to the
* handle will the destroy the returned buffer.
* Returns: 32 bytes representing the digest.
* Returns: 32 bytes representing the digest. When used for sha224,
* we take the leftmost 28 of those bytes.
*/
static void
@ -270,6 +296,8 @@ sha256_final(SHA256_CONTEXT *hd)
X(4);
X(5);
X(6);
/* Note that this last chunk is included even for SHA224. We just
ignore it. */
X(7);
#undef X
}
@ -316,3 +344,36 @@ sha256_get_info( int algo, size_t *contextsize,
return "SHA256";
}
/* SHA224 is really a truncated SHA256 with a different
initialization */
const char *
sha224_get_info( int algo, size_t *contextsize,
byte **r_asnoid, int *r_asnlen, int *r_mdlen,
void (**r_init)( void *c ),
void (**r_write)( void *c, byte *buf, size_t nbytes ),
void (**r_final)( void *c ),
byte *(**r_read)( void *c )
)
{
static byte asn[] = /* Object ID is 2.16.840.1.101.3.4.2.4 */
{
0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86,
0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x04, 0x05,
0x00, 0x04, 0x20
};
if( algo != 11 )
return NULL;
*contextsize = sizeof(SHA256_CONTEXT);
*r_asnoid = asn;
*r_asnlen = DIM(asn);
*r_mdlen = 28;
*(void (**)(SHA256_CONTEXT *))r_init = sha224_init;
*(void (**)(SHA256_CONTEXT *, byte*, size_t))r_write = sha256_write;
*(void (**)(SHA256_CONTEXT *))r_final = sha256_final;
*(byte *(**)(SHA256_CONTEXT *))r_read = sha256_read;
return "SHA224";
}

4
include/ChangeLog
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@ -1,3 +1,7 @@
2006-04-19 David Shaw <dshaw@jabberwocky.com>
* cipher.h: Add SHA-224.
2006-03-16 David Shaw <dshaw@jabberwocky.com>
* util.h: Handle the fixed IPGP type with fingerprint.

5
include/cipher.h
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@ -1,6 +1,6 @@
/* cipher.h
* Copyright (C) 1998, 1999, 2000, 2001, 2003, 2004,
* 2005 Free Software Foundation, Inc.
* Copyright (C) 1998, 1999, 2000, 2001, 2003, 2004, 2005,
* 2006 Free Software Foundation, Inc.
*
* This file is part of GNUPG.
*
@ -60,6 +60,7 @@
#define DIGEST_ALGO_SHA256 8
#define DIGEST_ALGO_SHA384 9
#define DIGEST_ALGO_SHA512 10
#define DIGEST_ALGO_SHA224 11
#define COMPRESS_ALGO_NONE 0
#define COMPRESS_ALGO_ZIP 1