hash.c 2.2 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
/*
 * This file is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2,
 * as published by the Free Software Foundation.
 *
 * In addition to the permissions in the GNU General Public License,
 * the authors give you unlimited permission to link the compiled
 * version of this file into combinations with other programs,
 * and to distribute those combinations without any restriction
 * coming from the use of this file.  (The General Public License
 * restrictions do apply in other respects; for example, they cover
 * modification of the file, and distribution when not linked into
 * a combined executable.)
 *
 * This file is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#include "common.h"
#include "hash.h"
28 29 30 31 32 33 34 35

#if defined(PPC_SHA1)
# include "ppc/sha1.h"
#elif defined(OPENSSL_SHA1)
# include <openssl/sha.h>
#else
# include "block-sha1/sha1.h"
#endif
36 37

struct git_hash_ctx {
38
	SHA_CTX c;
39 40 41 42
};

git_hash_ctx *git_hash_new_ctx(void)
{
43
	git_hash_ctx *ctx = git__malloc(sizeof(*ctx));
44 45 46 47

	if (!ctx)
		return NULL;

48
	SHA1_Init(&ctx->c);
49 50 51 52 53 54 55 56 57 58 59 60

	return ctx;
}

void git_hash_free_ctx(git_hash_ctx *ctx)
{
	free(ctx);
}

void git_hash_init(git_hash_ctx *ctx)
{
	assert(ctx);
61
	SHA1_Init(&ctx->c);
62 63 64 65 66
}

void git_hash_update(git_hash_ctx *ctx, const void *data, size_t len)
{
	assert(ctx);
67
	SHA1_Update(&ctx->c, data, len);
68 69 70 71 72
}

void git_hash_final(git_oid *out, git_hash_ctx *ctx)
{
	assert(ctx);
73
	SHA1_Final(out->id, &ctx->c);
74 75 76 77
}

void git_hash_buf(git_oid *out, const void *data, size_t len)
{
78
	SHA_CTX c;
79

80 81 82
	SHA1_Init(&c);
	SHA1_Update(&c, data, len);
	SHA1_Final(out->id, &c);
83 84 85 86
}

void git_hash_vec(git_oid *out, git_buf_vec *vec, size_t n)
{
87
	SHA_CTX c;
88 89
	size_t i;

90
	SHA1_Init(&c);
91
	for (i = 0; i < n; i++)
92 93
		SHA1_Update(&c, vec[i].data, vec[i].len);
	SHA1_Final(out->id, &c);
94
}