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 "hash.h"
9
git_hash_global_init(void)10 int git_hash_global_init(void)
11 {
12 return git_hash_sha1_global_init();
13 }
14
git_hash_ctx_init(git_hash_ctx * ctx)15 int git_hash_ctx_init(git_hash_ctx *ctx)
16 {
17 int error;
18
19 if ((error = git_hash_sha1_ctx_init(&ctx->sha1)) < 0)
20 return error;
21
22 ctx->algo = GIT_HASH_ALGO_SHA1;
23
24 return 0;
25 }
26
git_hash_ctx_cleanup(git_hash_ctx * ctx)27 void git_hash_ctx_cleanup(git_hash_ctx *ctx)
28 {
29 switch (ctx->algo) {
30 case GIT_HASH_ALGO_SHA1:
31 git_hash_sha1_ctx_cleanup(&ctx->sha1);
32 return;
33 default:
34 /* unreachable */ ;
35 }
36 }
37
git_hash_init(git_hash_ctx * ctx)38 int git_hash_init(git_hash_ctx *ctx)
39 {
40 switch (ctx->algo) {
41 case GIT_HASH_ALGO_SHA1:
42 return git_hash_sha1_init(&ctx->sha1);
43 default:
44 /* unreachable */ ;
45 }
46 GIT_ASSERT(0);
47 return -1;
48 }
49
git_hash_update(git_hash_ctx * ctx,const void * data,size_t len)50 int git_hash_update(git_hash_ctx *ctx, const void *data, size_t len)
51 {
52 switch (ctx->algo) {
53 case GIT_HASH_ALGO_SHA1:
54 return git_hash_sha1_update(&ctx->sha1, data, len);
55 default:
56 /* unreachable */ ;
57 }
58 GIT_ASSERT(0);
59 return -1;
60 }
61
git_hash_final(git_oid * out,git_hash_ctx * ctx)62 int git_hash_final(git_oid *out, git_hash_ctx *ctx)
63 {
64 switch (ctx->algo) {
65 case GIT_HASH_ALGO_SHA1:
66 return git_hash_sha1_final(out, &ctx->sha1);
67 default:
68 /* unreachable */ ;
69 }
70 GIT_ASSERT(0);
71 return -1;
72 }
73
git_hash_buf(git_oid * out,const void * data,size_t len)74 int git_hash_buf(git_oid *out, const void *data, size_t len)
75 {
76 git_hash_ctx ctx;
77 int error = 0;
78
79 if (git_hash_ctx_init(&ctx) < 0)
80 return -1;
81
82 if ((error = git_hash_update(&ctx, data, len)) >= 0)
83 error = git_hash_final(out, &ctx);
84
85 git_hash_ctx_cleanup(&ctx);
86
87 return error;
88 }
89
git_hash_vec(git_oid * out,git_buf_vec * vec,size_t n)90 int git_hash_vec(git_oid *out, git_buf_vec *vec, size_t n)
91 {
92 git_hash_ctx ctx;
93 size_t i;
94 int error = 0;
95
96 if (git_hash_ctx_init(&ctx) < 0)
97 return -1;
98
99 for (i = 0; i < n; i++) {
100 if ((error = git_hash_update(&ctx, vec[i].data, vec[i].len)) < 0)
101 goto done;
102 }
103
104 error = git_hash_final(out, &ctx);
105
106 done:
107 git_hash_ctx_cleanup(&ctx);
108
109 return error;
110 }
111