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d3819813 | 1 | /* |
7bf7a6d0 | 2 | * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved. |
d3819813 | 3 | * |
7bf7a6d0 MTL |
4 | * Licensed under the OpenSSL license (the "License"). You may not use |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
d3819813 MTL |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
7bf7a6d0 | 11 | #include "internal/cryptlib.h" |
d3819813 MTL |
12 | #include <openssl/evp.h> |
13 | #include <openssl/objects.h> | |
14 | #include <openssl/x509.h> | |
7bf7a6d0 | 15 | #include "internal/evp_int.h" |
d3819813 MTL |
16 | #include "evp_locl.h" |
17 | ||
18 | static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx, | |
19 | const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey, | |
20 | int ver) | |
21 | { | |
22 | if (ctx->pctx == NULL) | |
23 | ctx->pctx = EVP_PKEY_CTX_new(pkey, e); | |
24 | if (ctx->pctx == NULL) | |
25 | return 0; | |
26 | ||
27 | if (!(ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)) { | |
28 | ||
29 | if (type == NULL) { | |
30 | int def_nid; | |
31 | if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0) | |
32 | type = EVP_get_digestbynid(def_nid); | |
33 | } | |
34 | ||
35 | if (type == NULL) { | |
36 | EVPerr(EVP_F_DO_SIGVER_INIT, EVP_R_NO_DEFAULT_DIGEST); | |
37 | return 0; | |
38 | } | |
39 | } | |
40 | ||
41 | if (ver) { | |
42 | if (ctx->pctx->pmeth->verifyctx_init) { | |
43 | if (ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx) <= 0) | |
44 | return 0; | |
45 | ctx->pctx->operation = EVP_PKEY_OP_VERIFYCTX; | |
46 | } else if (EVP_PKEY_verify_init(ctx->pctx) <= 0) | |
47 | return 0; | |
48 | } else { | |
49 | if (ctx->pctx->pmeth->signctx_init) { | |
50 | if (ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx) <= 0) | |
51 | return 0; | |
52 | ctx->pctx->operation = EVP_PKEY_OP_SIGNCTX; | |
53 | } else if (EVP_PKEY_sign_init(ctx->pctx) <= 0) | |
54 | return 0; | |
55 | } | |
56 | if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0) | |
57 | return 0; | |
58 | if (pctx) | |
59 | *pctx = ctx->pctx; | |
60 | if (ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM) | |
61 | return 1; | |
62 | if (!EVP_DigestInit_ex(ctx, type, e)) | |
63 | return 0; | |
64 | return 1; | |
65 | } | |
66 | ||
67 | int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx, | |
68 | const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey) | |
69 | { | |
70 | return do_sigver_init(ctx, pctx, type, e, pkey, 0); | |
71 | } | |
72 | ||
73 | int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx, | |
74 | const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey) | |
75 | { | |
76 | return do_sigver_init(ctx, pctx, type, e, pkey, 1); | |
77 | } | |
78 | ||
79 | int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret, | |
80 | size_t *siglen) | |
81 | { | |
7bf7a6d0 | 82 | int sctx = 0, r = 0; |
d3819813 MTL |
83 | EVP_PKEY_CTX *pctx = ctx->pctx; |
84 | if (pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM) { | |
d3819813 MTL |
85 | if (!sigret) |
86 | return pctx->pmeth->signctx(pctx, sigret, siglen, ctx); | |
7bf7a6d0 MTL |
87 | if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) |
88 | r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx); | |
89 | else { | |
90 | EVP_PKEY_CTX *dctx = EVP_PKEY_CTX_dup(ctx->pctx); | |
91 | if (!dctx) | |
92 | return 0; | |
93 | r = dctx->pmeth->signctx(dctx, sigret, siglen, ctx); | |
94 | EVP_PKEY_CTX_free(dctx); | |
95 | } | |
d3819813 MTL |
96 | return r; |
97 | } | |
98 | if (pctx->pmeth->signctx) | |
99 | sctx = 1; | |
100 | else | |
101 | sctx = 0; | |
102 | if (sigret) { | |
d3819813 | 103 | unsigned char md[EVP_MAX_MD_SIZE]; |
7bf7a6d0 MTL |
104 | unsigned int mdlen = 0; |
105 | if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) { | |
106 | if (sctx) | |
107 | r = ctx->pctx->pmeth->signctx(ctx->pctx, sigret, siglen, ctx); | |
108 | else | |
109 | r = EVP_DigestFinal_ex(ctx, md, &mdlen); | |
110 | } else { | |
111 | EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new(); | |
112 | if (tmp_ctx == NULL || !EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) | |
113 | return 0; | |
114 | if (sctx) | |
115 | r = tmp_ctx->pctx->pmeth->signctx(tmp_ctx->pctx, | |
116 | sigret, siglen, tmp_ctx); | |
117 | else | |
118 | r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen); | |
119 | EVP_MD_CTX_free(tmp_ctx); | |
120 | } | |
d3819813 MTL |
121 | if (sctx || !r) |
122 | return r; | |
123 | if (EVP_PKEY_sign(ctx->pctx, sigret, siglen, md, mdlen) <= 0) | |
124 | return 0; | |
125 | } else { | |
126 | if (sctx) { | |
127 | if (pctx->pmeth->signctx(pctx, sigret, siglen, ctx) <= 0) | |
128 | return 0; | |
129 | } else { | |
130 | int s = EVP_MD_size(ctx->digest); | |
131 | if (s < 0 || EVP_PKEY_sign(pctx, sigret, siglen, NULL, s) <= 0) | |
132 | return 0; | |
133 | } | |
134 | } | |
135 | return 1; | |
136 | } | |
137 | ||
138 | int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig, | |
139 | size_t siglen) | |
140 | { | |
d3819813 | 141 | unsigned char md[EVP_MAX_MD_SIZE]; |
7bf7a6d0 MTL |
142 | int r = 0; |
143 | unsigned int mdlen = 0; | |
144 | int vctx = 0; | |
d3819813 MTL |
145 | |
146 | if (ctx->pctx->pmeth->verifyctx) | |
147 | vctx = 1; | |
148 | else | |
149 | vctx = 0; | |
7bf7a6d0 MTL |
150 | if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) { |
151 | if (vctx) { | |
152 | r = ctx->pctx->pmeth->verifyctx(ctx->pctx, sig, siglen, ctx); | |
153 | } else | |
154 | r = EVP_DigestFinal_ex(ctx, md, &mdlen); | |
155 | } else { | |
156 | EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new(); | |
157 | if (tmp_ctx == NULL || !EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) | |
158 | return -1; | |
159 | if (vctx) { | |
160 | r = tmp_ctx->pctx->pmeth->verifyctx(tmp_ctx->pctx, | |
161 | sig, siglen, tmp_ctx); | |
162 | } else | |
163 | r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen); | |
164 | EVP_MD_CTX_free(tmp_ctx); | |
165 | } | |
d3819813 MTL |
166 | if (vctx || !r) |
167 | return r; | |
168 | return EVP_PKEY_verify(ctx->pctx, sig, siglen, md, mdlen); | |
169 | } |