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) {
65 = EVP_SIGNATURE_fetch(NULL, OBJ_nid2sn(locpctx->pkey->type), NULL);
67 if (signature == NULL) {
68 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
72 locpctx->operation = ver ? EVP_PKEY_OP_VERIFYCTX
73 : EVP_PKEY_OP_SIGNCTX;
75 locpctx->op.sig.signature = signature;
77 locpctx->op.sig.sigprovctx
78 = signature->newctx(ossl_provider_ctx(signature->prov));
79 if (locpctx->op.sig.sigprovctx == NULL) {
80 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
83 provkey = evp_keymgmt_export_to_provider(locpctx->pkey, signature->keymgmt);
84 if (provkey == NULL) {
85 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
90 mdname = EVP_MD_name(type);
91 ctx->reqdigest = type;
94 * This might be requested by a later call to EVP_MD_CTX_md(). In that
95 * case the "explicit fetch" rules apply for that function (as per
96 * man pages), i.e. the ref count is not updated so the EVP_MD should
97 * not be used beyound the lifetime of the EVP_MD_CTX.
100 = ctx->fetched_digest
102 ossl_provider_library_context(EVP_SIGNATURE_provider(signature)),
107 if (signature->digest_verify_init == NULL) {
108 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
111 ret = signature->digest_verify_init(locpctx->op.sig.sigprovctx, mdname,
114 if (signature->digest_sign_init == NULL) {
115 ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
118 ret = signature->digest_sign_init(locpctx->op.sig.sigprovctx, mdname,
124 evp_pkey_ctx_free_old_ops(locpctx);
125 locpctx->operation = EVP_PKEY_OP_UNDEFINED;
129 if (!(ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)) {
133 if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0)
134 type = EVP_get_digestbynid(def_nid);
138 EVPerr(EVP_F_DO_SIGVER_INIT, EVP_R_NO_DEFAULT_DIGEST);
144 if (ctx->pctx->pmeth->verifyctx_init) {
145 if (ctx->pctx->pmeth->verifyctx_init(ctx->pctx, ctx) <= 0)
147 ctx->pctx->operation = EVP_PKEY_OP_VERIFYCTX;
148 } else if (ctx->pctx->pmeth->digestverify != 0) {
149 ctx->pctx->operation = EVP_PKEY_OP_VERIFY;
150 ctx->update = update;
151 } else if (EVP_PKEY_verify_init(ctx->pctx) <= 0) {
155 if (ctx->pctx->pmeth->signctx_init) {
156 if (ctx->pctx->pmeth->signctx_init(ctx->pctx, ctx) <= 0)
158 ctx->pctx->operation = EVP_PKEY_OP_SIGNCTX;
159 } else if (ctx->pctx->pmeth->digestsign != 0) {
160 ctx->pctx->operation = EVP_PKEY_OP_SIGN;
161 ctx->update = update;
162 } else if (EVP_PKEY_sign_init(ctx->pctx) <= 0) {
166 if (EVP_PKEY_CTX_set_signature_md(ctx->pctx, type) <= 0)
170 if (ctx->pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM)
172 if (!EVP_DigestInit_ex(ctx, type, e))
175 * This indicates the current algorithm requires
176 * special treatment before hashing the tbs-message.
178 if (ctx->pctx->pmeth->digest_custom != NULL)
179 return ctx->pctx->pmeth->digest_custom(ctx->pctx, ctx);
184 int EVP_DigestSignInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
185 const char *mdname, const char *props, EVP_PKEY *pkey,
186 EVP_SIGNATURE *signature)
188 return do_sigver_init(ctx, pctx, NULL, mdname, props, NULL, pkey, signature,
192 int EVP_DigestSignInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
193 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
195 return do_sigver_init(ctx, pctx, type, NULL, NULL, e, pkey, NULL, 0);
198 int EVP_DigestVerifyInit_ex(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
199 const char *mdname, const char *props,
200 EVP_PKEY *pkey, EVP_SIGNATURE *signature)
202 return do_sigver_init(ctx, pctx, NULL, mdname, props, NULL, pkey, signature,
206 int EVP_DigestVerifyInit(EVP_MD_CTX *ctx, EVP_PKEY_CTX **pctx,
207 const EVP_MD *type, ENGINE *e, EVP_PKEY *pkey)
209 return do_sigver_init(ctx, pctx, type, NULL, NULL, e, pkey, NULL, 1);
212 int EVP_DigestSignUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
214 EVP_PKEY_CTX *pctx = ctx->pctx;
217 || pctx->operation != EVP_PKEY_OP_SIGNCTX
218 || pctx->op.sig.sigprovctx == NULL
219 || pctx->op.sig.signature == NULL)
222 return pctx->op.sig.signature->digest_sign_update(pctx->op.sig.sigprovctx,
226 return EVP_DigestUpdate(ctx, data, dsize);
229 int EVP_DigestVerifyUpdate(EVP_MD_CTX *ctx, const void *data, size_t dsize)
231 EVP_PKEY_CTX *pctx = ctx->pctx;
234 || pctx->operation != EVP_PKEY_OP_VERIFYCTX
235 || pctx->op.sig.sigprovctx == NULL
236 || pctx->op.sig.signature == NULL)
239 return pctx->op.sig.signature->digest_verify_update(pctx->op.sig.sigprovctx,
243 return EVP_DigestUpdate(ctx, data, dsize);
247 int EVP_DigestSignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
251 EVP_PKEY_CTX *pctx = ctx->pctx;
254 || pctx->operation != EVP_PKEY_OP_SIGNCTX
255 || pctx->op.sig.sigprovctx == NULL
256 || pctx->op.sig.signature == NULL)
259 return pctx->op.sig.signature->digest_sign_final(pctx->op.sig.sigprovctx,
260 sigret, siglen, SIZE_MAX);
263 if (pctx->pmeth->flags & EVP_PKEY_FLAG_SIGCTX_CUSTOM) {
265 return pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
266 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE)
267 r = pctx->pmeth->signctx(pctx, sigret, siglen, ctx);
269 EVP_PKEY_CTX *dctx = EVP_PKEY_CTX_dup(ctx->pctx);
272 r = dctx->pmeth->signctx(dctx, sigret, siglen, ctx);
273 EVP_PKEY_CTX_free(dctx);
277 if (pctx->pmeth->signctx)
282 unsigned char md[EVP_MAX_MD_SIZE];
283 unsigned int mdlen = 0;
284 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
286 r = ctx->pctx->pmeth->signctx(ctx->pctx, sigret, siglen, ctx);
288 r = EVP_DigestFinal_ex(ctx, md, &mdlen);
290 EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
293 if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
294 EVP_MD_CTX_free(tmp_ctx);
298 r = tmp_ctx->pctx->pmeth->signctx(tmp_ctx->pctx,
299 sigret, siglen, tmp_ctx);
301 r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
302 EVP_MD_CTX_free(tmp_ctx);
306 if (EVP_PKEY_sign(ctx->pctx, sigret, siglen, md, mdlen) <= 0)
310 if (pctx->pmeth->signctx(pctx, sigret, siglen, ctx) <= 0)
313 int s = EVP_MD_size(ctx->digest);
314 if (s < 0 || EVP_PKEY_sign(pctx, sigret, siglen, NULL, s) <= 0)
321 int EVP_DigestSign(EVP_MD_CTX *ctx, unsigned char *sigret, size_t *siglen,
322 const unsigned char *tbs, size_t tbslen)
324 if (ctx->pctx->pmeth->digestsign != NULL)
325 return ctx->pctx->pmeth->digestsign(ctx, sigret, siglen, tbs, tbslen);
326 if (sigret != NULL && EVP_DigestSignUpdate(ctx, tbs, tbslen) <= 0)
328 return EVP_DigestSignFinal(ctx, sigret, siglen);
331 int EVP_DigestVerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sig,
334 unsigned char md[EVP_MAX_MD_SIZE];
336 unsigned int mdlen = 0;
338 EVP_PKEY_CTX *pctx = ctx->pctx;
341 || pctx->operation != EVP_PKEY_OP_VERIFYCTX
342 || pctx->op.sig.sigprovctx == NULL
343 || pctx->op.sig.signature == NULL)
346 return pctx->op.sig.signature->digest_verify_final(pctx->op.sig.sigprovctx,
350 if (ctx->pctx->pmeth->verifyctx)
354 if (ctx->flags & EVP_MD_CTX_FLAG_FINALISE) {
356 r = ctx->pctx->pmeth->verifyctx(ctx->pctx, sig, siglen, ctx);
358 r = EVP_DigestFinal_ex(ctx, md, &mdlen);
360 EVP_MD_CTX *tmp_ctx = EVP_MD_CTX_new();
363 if (!EVP_MD_CTX_copy_ex(tmp_ctx, ctx)) {
364 EVP_MD_CTX_free(tmp_ctx);
368 r = tmp_ctx->pctx->pmeth->verifyctx(tmp_ctx->pctx,
369 sig, siglen, tmp_ctx);
371 r = EVP_DigestFinal_ex(tmp_ctx, md, &mdlen);
372 EVP_MD_CTX_free(tmp_ctx);
376 return EVP_PKEY_verify(ctx->pctx, sig, siglen, md, mdlen);
379 int EVP_DigestVerify(EVP_MD_CTX *ctx, const unsigned char *sigret,
380 size_t siglen, const unsigned char *tbs, size_t tbslen)
382 if (ctx->pctx->pmeth->digestverify != NULL)
383 return ctx->pctx->pmeth->digestverify(ctx, sigret, siglen, tbs, tbslen);
384 if (EVP_DigestVerifyUpdate(ctx, tbs, tbslen) <= 0)
386 return EVP_DigestVerifyFinal(ctx, sigret, siglen);