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 "collisiondetect.h"
9
git_hash_sha1_global_init(void)10 int git_hash_sha1_global_init(void)
11 {
12 return 0;
13 }
14
git_hash_sha1_ctx_init(git_hash_sha1_ctx * ctx)15 int git_hash_sha1_ctx_init(git_hash_sha1_ctx *ctx)
16 {
17 return git_hash_sha1_init(ctx);
18 }
19
git_hash_sha1_ctx_cleanup(git_hash_sha1_ctx * ctx)20 void git_hash_sha1_ctx_cleanup(git_hash_sha1_ctx *ctx)
21 {
22 GIT_UNUSED(ctx);
23 }
24
git_hash_sha1_init(git_hash_sha1_ctx * ctx)25 int git_hash_sha1_init(git_hash_sha1_ctx *ctx)
26 {
27 GIT_ASSERT_ARG(ctx);
28 SHA1DCInit(&ctx->c);
29 return 0;
30 }
31
git_hash_sha1_update(git_hash_sha1_ctx * ctx,const void * data,size_t len)32 int git_hash_sha1_update(git_hash_sha1_ctx *ctx, const void *data, size_t len)
33 {
34 GIT_ASSERT_ARG(ctx);
35 SHA1DCUpdate(&ctx->c, data, len);
36 return 0;
37 }
38
git_hash_sha1_final(git_oid * out,git_hash_sha1_ctx * ctx)39 int git_hash_sha1_final(git_oid *out, git_hash_sha1_ctx *ctx)
40 {
41 GIT_ASSERT_ARG(ctx);
42 if (SHA1DCFinal(out->id, &ctx->c)) {
43 git_error_set(GIT_ERROR_SHA1, "SHA1 collision attack detected");
44 return -1;
45 }
46
47 return 0;
48 }
49