2 * Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (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
11 #include "internal/cryptlib.h"
12 #include <openssl/evp.h>
13 #include <openssl/objects.h>
14 #include <openssl/x509.h>
15 #include "crypto/evp.h"
16 #include "internal/provider.h"
17 #include "evp_local.h"
19 static int update(EVP_MD_CTX *ctx, const void *data, size_t datalen)
21 EVPerr(EVP_F_UPDATE, EVP_R_ONLY_ONESHOT_SUPPORTED);
25 static int do_sigver_init(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
26 const EVP_MD *type, const char *mdname,
27 const char *props, ENGINE *e, EVP_PKEY *pkey,
28 EVP_SIGNATURE *signature, int ver)
30 EVP_PKEY_CTX *locpctx = NULL;
34 if (ctx->pctx == NULL) {
35 ctx->pctx = EVP_PKEY_CTX_new(pkey, e);
36 if (ctx->pctx == NULL)
38 } else if (pkey != NULL) {
39 if (!EVP_PKEY_up_ref(pkey))
41 EVP_PKEY_free(ctx->pctx->pkey);
42 ctx->pctx->pkey = pkey;
45 evp_pkey_ctx_free_old_ops(locpctx);
46 if (locpctx->pkey == NULL)
49 if (e != NULL || locpctx->engine != NULL)
52 if (signature != NULL) {
53 if (!EVP_SIGNATURE_up_ref(signature))
57 * TODO(3.0): Check for legacy handling. Remove this once all all
58 * algorithms are moved to providers.
60 switch (locpctx->pkey->type) {
67 = EVP_SIGNATURE_fetch(NULL, OBJ_nid2sn(locpctx->pkey->type), NULL);
69 if (signature == NULL) {
70 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
74 locpctx->operation = ver ? EVP_PKEY_OP_VERIFYCTX
75 : EVP_PKEY_OP_SIGNCTX;
77 locpctx->op.sig.signature = signature;
79 locpctx->op.sig.sigprovctx
80 = signature->newctx(ossl_provider_ctx(signature->prov));
81 if (locpctx->op.sig.sigprovctx == NULL) {
82 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
85 provkey = evp_keymgmt_export_to_provider(locpctx->pkey, signature->keymgmt);
86 if (provkey == NULL) {
87 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
92 mdname = EVP_MD_name(type);
93 ctx->reqdigest = type;
96 * This might be requested by a later call to EVP_MD_CTX_md(). In that
97 * case the "explicit fetch" rules apply for that function (as per
98 * man pages), i.e. the ref count is not updated so the EVP_MD should
99 * not be used beyound the lifetime of the EVP_MD_CTX.
102 = ctx->fetched_digest
104 ossl_provider_library_context(EVP_SIGNATURE_provider(signature)),
109 if (signature->digest_verify_init == NULL) {
110 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
113 ret = signature->digest_verify_init(locpctx->op.sig.sigprovctx, mdname,
116 if (signature->digest_sign_init == NULL) {
117 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
120 ret = signature->digest_sign_init(locpctx->op.sig.sigprovctx, mdname,
126 evp_pkey_ctx_free_old_ops(locpctx);
127 locpctx->operation = EVP_PKEY_OP_UNDEFINED;
131 if (!(ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)) {
135 if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0)
136 type = EVP_get_digestbynid(def_nid);
140 EVPerr(EVP_F_DO_SIGVER_INIT, EVP_R_NO_DEFAULT_DIGEST);
146 if (ctx->pctx->pmeth->verifyctx_init) {
147 if (ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx) <= 0)
149 ctx->pctx->operation = EVP_PKEY_OP_VERIFYCTX;
150 } else if (ctx->pctx->pmeth->digestverify != 0) {
151 ctx->pctx->operation = EVP_PKEY_OP_VERIFY;
152 ctx->update = update;
153 } else if (EVP_PKEY_verify_init(ctx->pctx) <= 0) {
157 if (ctx->pctx->pmeth->signctx_init) {
158 if (ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx) <= 0)
160 ctx->pctx->operation = EVP_PKEY_OP_SIGNCTX;
161 } else if (ctx->pctx->pmeth->digestsign != 0) {
162 ctx->pctx->operation = EVP_PKEY_OP_SIGN;
163 ctx->update = update;
164 } else if (EVP_PKEY_sign_init(ctx->pctx) <= 0) {
168 if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0)
172 if (ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)
174 if (!EVP_DigestInit_ex(ctx, type, e))
177 * This indicates the current algorithm requires
178 * special treatment before hashing the tbs-message.
180 if (ctx->pctx->pmeth->digest_custom != NULL)
181 return ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx);
186 int EVP_DigestSignInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
187 const char *mdname, const char *props, EVP_PKEY *pkey,
188 EVP_SIGNATURE *signature)
190 return do_sigver_init(ctx, pctx, NULL, mdname, props, NULL, pkey, signature,
194 int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
195 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
197 return do_sigver_init(ctx, pctx, type, NULL, NULL, e, pkey, NULL, 0);
200 int EVP_DigestVerifyInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
201 const char *mdname, const char *props,
202 EVP_PKEY *pkey, EVP_SIGNATURE *signature)
204 return do_sigver_init(ctx, pctx, NULL, mdname, props, NULL, pkey, signature,
208 int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
209 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
211 return do_sigver_init(ctx, pctx, type, NULL, NULL, e, pkey, NULL, 1);
214 int EVP_DigestSignUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
216 EVP_PKEY_CTX *pctx = ctx->pctx;
219 || pctx->operation != EVP_PKEY_OP_SIGNCTX
220 || pctx->op.sig.sigprovctx == NULL
221 || pctx->op.sig.signature == NULL)
224 return pctx->op.sig.signature->digest_sign_update(pctx->op.sig.sigprovctx,
228 return EVP_DigestUpdate(ctx, data, dsize);
231 int EVP_DigestVerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
233 EVP_PKEY_CTX *pctx = ctx->pctx;
236 || pctx->operation != EVP_PKEY_OP_VERIFYCTX
237 || pctx->op.sig.sigprovctx == NULL
238 || pctx->op.sig.signature == NULL)
241 return pctx->op.sig.signature->digest_verify_update(pctx->op.sig.sigprovctx,
245 return EVP_DigestUpdate(ctx, data, dsize);
249 int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
253 EVP_PKEY_CTX *pctx = ctx->pctx;
256 || pctx->operation != EVP_PKEY_OP_SIGNCTX
257 || pctx->op.sig.sigprovctx == NULL
258 || pctx->op.sig.signature == NULL)
261 return pctx->op.sig.signature->digest_sign_final(pctx->op.sig.sigprovctx,
262 sigret, siglen, SIZE_MAX);
265 if (pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM) {
267 return pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
268 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE)
269 r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
271 EVP_PKEY_CTX *dctx = EVP_PKEY_CTX_dup(ctx->pctx);
274 r = dctx->pmeth->signctx(dctx, sigret, siglen, ctx);
275 EVP_PKEY_CTX_free(dctx);
279 if (pctx->pmeth->signctx)
284 unsigned char md[EVP_MAX_MD_SIZE];
285 unsigned int mdlen = 0;
286 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
288 r = ctx->pctx->pmeth->signctx(ctx->pctx, sigret, siglen, ctx);
290 r = EVP_DigestFinal_ex(ctx, md, &mdlen);
292 EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
295 if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
296 EVP_MD_CTX_free(tmp_ctx);
300 r = tmp_ctx->pctx->pmeth->signctx(tmp_ctx->pctx,
301 sigret, siglen, tmp_ctx);
303 r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
304 EVP_MD_CTX_free(tmp_ctx);
308 if (EVP_PKEY_sign(ctx->pctx, sigret, siglen, md, mdlen) <= 0)
312 if (pctx->pmeth->signctx(pctx, sigret, siglen, ctx) <= 0)
315 int s = EVP_MD_size(ctx->digest);
316 if (s < 0 || EVP_PKEY_sign(pctx, sigret, siglen, NULL, s) <= 0)
323 int EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen,
324 const unsigned char *tbs, size_t tbslen)
326 if (ctx->pctx->pmeth->digestsign != NULL)
327 return ctx->pctx->pmeth->digestsign(ctx, sigret, siglen, tbs, tbslen);
328 if (sigret != NULL && EVP_DigestSignUpdate(ctx, tbs, tbslen) <= 0)
330 return EVP_DigestSignFinal(ctx, sigret, siglen);
333 int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig,
336 unsigned char md[EVP_MAX_MD_SIZE];
338 unsigned int mdlen = 0;
340 EVP_PKEY_CTX *pctx = ctx->pctx;
343 || pctx->operation != EVP_PKEY_OP_VERIFYCTX
344 || pctx->op.sig.sigprovctx == NULL
345 || pctx->op.sig.signature == NULL)
348 return pctx->op.sig.signature->digest_verify_final(pctx->op.sig.sigprovctx,
352 if (ctx->pctx->pmeth->verifyctx)
356 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
358 r = ctx->pctx->pmeth->verifyctx(ctx->pctx, sig, siglen, ctx);
360 r = EVP_DigestFinal_ex(ctx, md, &mdlen);
362 EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
365 if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
366 EVP_MD_CTX_free(tmp_ctx);
370 r = tmp_ctx->pctx->pmeth->verifyctx(tmp_ctx->pctx,
371 sig, siglen, tmp_ctx);
373 r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
374 EVP_MD_CTX_free(tmp_ctx);
378 return EVP_PKEY_verify(ctx->pctx, sig, siglen, md, mdlen);
381 int EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sigret,
382 size_t siglen, const unsigned char *tbs, size_t tbslen)
384 if (ctx->pctx->pmeth->digestverify != NULL)
385 return ctx->pctx->pmeth->digestverify(ctx, sigret, siglen, tbs, tbslen);
386 if (EVP_DigestVerifyUpdate(ctx, tbs, tbslen) <= 0)
388 return EVP_DigestVerifyFinal(ctx, sigret, siglen);