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Implement SHA2-224 submode of SHA2-256

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Like SHA2-384:SHA2-512, SHA2-224 is simply a truncated SHA2-256 with a
different initial vector.  Add to round out the complete basic SHA2 family.
This commit is contained in:
Conrad Meyer 2018-07-09 07:24:05 +00:00
parent 590adc1bc2
commit 1245c6d1a5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=336123
2 changed files with 154 additions and 0 deletions
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96
sys/crypto/sha2/sha224.h Normal file
View file

@ -0,0 +1,96 @@
/*-
* Copyright 2005 Colin Percival
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 CONTRIBUTORS 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.
*
* $FreeBSD$
*/
#ifndef _SHA224_H_
#define _SHA224_H_
#ifndef _KERNEL
#include <sys/types.h>
#endif
#define SHA224_BLOCK_LENGTH 64
#define SHA224_DIGEST_LENGTH 28
#define SHA224_DIGEST_STRING_LENGTH (SHA224_DIGEST_LENGTH * 2 + 1)
typedef struct SHA224Context {
uint32_t state[8];
uint64_t count;
uint8_t buf[SHA224_BLOCK_LENGTH];
} SHA224_CTX;
__BEGIN_DECLS
/* Ensure libmd symbols do not clash with libcrypto */
#ifndef SHA224_Init
#define SHA224_Init _libmd_SHA224_Init
#endif
#ifndef SHA224_Update
#define SHA224_Update _libmd_SHA224_Update
#endif
#ifndef SHA224_Final
#define SHA224_Final _libmd_SHA224_Final
#endif
#ifndef SHA224_End
#define SHA224_End _libmd_SHA224_End
#endif
#ifndef SHA224_Fd
#define SHA224_Fd _libmd_SHA224_Fd
#endif
#ifndef SHA224_FdChunk
#define SHA224_FdChunk _libmd_SHA224_FdChunk
#endif
#ifndef SHA224_File
#define SHA224_File _libmd_SHA224_File
#endif
#ifndef SHA224_FileChunk
#define SHA224_FileChunk _libmd_SHA224_FileChunk
#endif
#ifndef SHA224_Data
#define SHA224_Data _libmd_SHA224_Data
#endif
#ifndef SHA224_version
#define SHA224_version _libmd_SHA224_version
#endif
void SHA224_Init(SHA224_CTX *);
void SHA224_Update(SHA224_CTX *, const void *, size_t);
void SHA224_Final(unsigned char [__min_size(SHA224_DIGEST_LENGTH)],
SHA224_CTX *);
#ifndef _KERNEL
char *SHA224_End(SHA224_CTX *, char *);
char *SHA224_Data(const void *, unsigned int, char *);
char *SHA224_Fd(int, char *);
char *SHA224_FdChunk(int, char *, off_t, off_t);
char *SHA224_File(const char *, char *);
char *SHA224_FileChunk(const char *, char *, off_t, off_t);
#endif
__END_DECLS
#endif /* !_SHA224_H_ */

58
sys/crypto/sha2/sha256c.c
View file

@ -36,6 +36,7 @@ __FBSDID("$FreeBSD$");
#include <string.h>
#endif
#include "sha224.h"
#include "sha256.h"
#if BYTE_ORDER == BIG_ENDIAN
@ -300,6 +301,56 @@ SHA256_Final(unsigned char digest[static SHA256_DIGEST_LENGTH], SHA256_CTX *ctx)
memset(ctx, 0, sizeof(*ctx));
}
/*** SHA-224: *********************************************************/
/*
* the SHA224 and SHA256 transforms are identical
*/
/* SHA-224 initialization. Begins a SHA-224 operation. */
void
SHA224_Init(SHA224_CTX * ctx)
{
/* Zero bits processed so far */
ctx->count = 0;
/* Magic initialization constants */
ctx->state[0] = 0xC1059ED8;
ctx->state[1] = 0x367CD507;
ctx->state[2] = 0x3070DD17;
ctx->state[3] = 0xF70E5939;
ctx->state[4] = 0xFFC00B31;
ctx->state[5] = 0x68581511;
ctx->state[6] = 0x64f98FA7;
ctx->state[7] = 0xBEFA4FA4;
}
/* Add bytes into the SHA-224 hash */
void
SHA224_Update(SHA224_CTX * ctx, const void *in, size_t len)
{
SHA256_Update((SHA256_CTX *)ctx, in, len);
}
/*
* SHA-224 finalization. Pads the input data, exports the hash value,
* and clears the context state.
*/
void
SHA224_Final(unsigned char digest[static SHA224_DIGEST_LENGTH], SHA224_CTX *ctx)
{
/* Add padding */
SHA256_Pad((SHA256_CTX *)ctx);
/* Write the hash */
be32enc_vect(digest, ctx->state, SHA224_DIGEST_LENGTH);
/* Clear the context state */
explicit_bzero(ctx, sizeof(*ctx));
}
#ifdef WEAK_REFS
/* When building libmd, provide weak references. Note: this is not
activated in the context of compiling these sources for internal
@ -313,4 +364,11 @@ __weak_reference(_libmd_SHA256_Update, SHA256_Update);
__weak_reference(_libmd_SHA256_Final, SHA256_Final);
#undef SHA256_Transform
__weak_reference(_libmd_SHA256_Transform, SHA256_Transform);
#undef SHA224_Init
__weak_reference(_libmd_SHA224_Init, SHA224_Init);
#undef SHA224_Update
__weak_reference(_libmd_SHA224_Update, SHA224_Update);
#undef SHA224_Final
__weak_reference(_libmd_SHA224_Final, SHA224_Final);
#endif