1 /*
2 * Copyright (C) the libgit2 contributors. All rights reserved.
3 *
4 * This file is part of libgit2, distributed under the GNU GPL v2 with
5 * a Linking Exception. For full terms see the included COPYING file.
6 */
7
8 #include "common_crypto.h"
9
10 #define CC_LONG_MAX ((CC_LONG)-1)
11
git_hash_sha1_global_init(void)12 int git_hash_sha1_global_init(void)
13 {
14 return 0;
15 }
16
git_hash_sha1_ctx_init(git_hash_sha1_ctx * ctx)17 int git_hash_sha1_ctx_init(git_hash_sha1_ctx *ctx)
18 {
19 return git_hash_sha1_init(ctx);
20 }
21
git_hash_sha1_ctx_cleanup(git_hash_sha1_ctx * ctx)22 void git_hash_sha1_ctx_cleanup(git_hash_sha1_ctx *ctx)
23 {
24 GIT_UNUSED(ctx);
25 }
26
git_hash_sha1_init(git_hash_sha1_ctx * ctx)27 int git_hash_sha1_init(git_hash_sha1_ctx *ctx)
28 {
29 GIT_ASSERT_ARG(ctx);
30 CC_SHA1_Init(&ctx->c);
31 return 0;
32 }
33
git_hash_sha1_update(git_hash_sha1_ctx * ctx,const void * _data,size_t len)34 int git_hash_sha1_update(git_hash_sha1_ctx *ctx, const void *_data, size_t len)
35 {
36 const unsigned char *data = _data;
37
38 GIT_ASSERT_ARG(ctx);
39
40 while (len > 0) {
41 CC_LONG chunk = (len > CC_LONG_MAX) ? CC_LONG_MAX : (CC_LONG)len;
42
43 CC_SHA1_Update(&ctx->c, data, chunk);
44
45 data += chunk;
46 len -= chunk;
47 }
48
49 return 0;
50 }
51
git_hash_sha1_final(git_oid * out,git_hash_sha1_ctx * ctx)52 int git_hash_sha1_final(git_oid *out, git_hash_sha1_ctx *ctx)
53 {
54 GIT_ASSERT_ARG(ctx);
55 CC_SHA1_Final(out->id, &ctx->c);
56 return 0;
57 }
58