2 * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
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
12 #include "internal/cryptlib.h"
13 #include <openssl/engine.h>
14 #include <openssl/evp.h>
15 #include <openssl/x509v3.h>
16 #include "internal/asn1_int.h"
17 #include "internal/evp_int.h"
18 #include "internal/numbers.h"
20 typedef int sk_cmp_fn_type(const char *const *a, const char *const *b);
22 static STACK_OF(EVP_PKEY_METHOD) *app_pkey_methods = NULL;
24 static const EVP_PKEY_METHOD *standard_methods[] = {
25 #ifndef OPENSSL_NO_RSA
31 #ifndef OPENSSL_NO_DSA
38 #ifndef OPENSSL_NO_CMAC
41 #ifndef OPENSSL_NO_RSA
52 #ifndef OPENSSL_NO_POLY1305
57 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
60 static int pmeth_cmp(const EVP_PKEY_METHOD *const *a,
61 const EVP_PKEY_METHOD *const *b)
63 return ((*a)->pkey_id - (*b)->pkey_id);
66 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
69 const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
72 const EVP_PKEY_METHOD *t = &tmp, **ret;
74 if (app_pkey_methods) {
76 idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
78 return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
80 ret = OBJ_bsearch_pmeth(&t, standard_methods,
81 sizeof(standard_methods) /
82 sizeof(EVP_PKEY_METHOD *));
88 static EVP_PKEY_CTX *int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id)
91 const EVP_PKEY_METHOD *pmeth;
93 if (!pkey || !pkey->ameth)
95 id = pkey->ameth->pkey_id;
97 #ifndef OPENSSL_NO_ENGINE
98 if (pkey && pkey->engine)
100 /* Try to find an ENGINE which implements this method */
102 if (!ENGINE_init(e)) {
103 EVPerr(EVP_F_INT_CTX_NEW, ERR_R_ENGINE_LIB);
107 e = ENGINE_get_pkey_meth_engine(id);
110 * If an ENGINE handled this method look it up. Otherwise use internal
115 pmeth = ENGINE_get_pkey_meth(e, id);
118 pmeth = EVP_PKEY_meth_find(id);
121 EVPerr(EVP_F_INT_CTX_NEW, EVP_R_UNSUPPORTED_ALGORITHM);
125 ret = OPENSSL_zalloc(sizeof(*ret));
127 #ifndef OPENSSL_NO_ENGINE
130 EVPerr(EVP_F_INT_CTX_NEW, ERR_R_MALLOC_FAILURE);
135 ret->operation = EVP_PKEY_OP_UNDEFINED;
138 EVP_PKEY_up_ref(pkey);
141 if (pmeth->init(ret) <= 0) {
142 EVP_PKEY_CTX_free(ret);
150 EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags)
152 EVP_PKEY_METHOD *pmeth;
154 pmeth = OPENSSL_zalloc(sizeof(*pmeth));
159 pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
163 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
164 const EVP_PKEY_METHOD *meth)
167 *ppkey_id = meth->pkey_id;
169 *pflags = meth->flags;
172 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
175 dst->init = src->init;
176 dst->copy = src->copy;
177 dst->cleanup = src->cleanup;
179 dst->paramgen_init = src->paramgen_init;
180 dst->paramgen = src->paramgen;
182 dst->keygen_init = src->keygen_init;
183 dst->keygen = src->keygen;
185 dst->sign_init = src->sign_init;
186 dst->sign = src->sign;
188 dst->verify_init = src->verify_init;
189 dst->verify = src->verify;
191 dst->verify_recover_init = src->verify_recover_init;
192 dst->verify_recover = src->verify_recover;
194 dst->signctx_init = src->signctx_init;
195 dst->signctx = src->signctx;
197 dst->verifyctx_init = src->verifyctx_init;
198 dst->verifyctx = src->verifyctx;
200 dst->encrypt_init = src->encrypt_init;
201 dst->encrypt = src->encrypt;
203 dst->decrypt_init = src->decrypt_init;
204 dst->decrypt = src->decrypt;
206 dst->derive_init = src->derive_init;
207 dst->derive = src->derive;
209 dst->ctrl = src->ctrl;
210 dst->ctrl_str = src->ctrl_str;
213 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
215 if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
219 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
221 return int_ctx_new(pkey, e, -1);
224 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
226 return int_ctx_new(NULL, e, id);
229 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
232 if (!pctx->pmeth || !pctx->pmeth->copy)
234 #ifndef OPENSSL_NO_ENGINE
235 /* Make sure it's safe to copy a pkey context using an ENGINE */
236 if (pctx->engine && !ENGINE_init(pctx->engine)) {
237 EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
241 rctx = OPENSSL_malloc(sizeof(*rctx));
245 rctx->pmeth = pctx->pmeth;
246 #ifndef OPENSSL_NO_ENGINE
247 rctx->engine = pctx->engine;
251 EVP_PKEY_up_ref(pctx->pkey);
253 rctx->pkey = pctx->pkey;
256 EVP_PKEY_up_ref(pctx->peerkey);
258 rctx->peerkey = pctx->peerkey;
261 rctx->app_data = NULL;
262 rctx->operation = pctx->operation;
264 if (pctx->pmeth->copy(rctx, pctx) > 0)
267 EVP_PKEY_CTX_free(rctx);
272 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
274 if (app_pkey_methods == NULL) {
275 app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
276 if (app_pkey_methods == NULL)
279 if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
281 sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
285 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
289 if (ctx->pmeth && ctx->pmeth->cleanup)
290 ctx->pmeth->cleanup(ctx);
291 EVP_PKEY_free(ctx->pkey);
292 EVP_PKEY_free(ctx->peerkey);
293 #ifndef OPENSSL_NO_ENGINE
294 ENGINE_finish(ctx->engine);
299 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
300 int cmd, int p1, void *p2)
303 if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl) {
304 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
307 if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
310 if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
311 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
315 if ((optype != -1) && !(ctx->operation & optype)) {
316 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
320 ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
323 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
329 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
330 const char *name, const char *value)
332 if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
333 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
336 if (strcmp(name, "digest") == 0)
337 return EVP_PKEY_CTX_md(ctx, EVP_PKEY_OP_TYPE_SIG, EVP_PKEY_CTRL_MD,
339 return ctx->pmeth->ctrl_str(ctx, name, value);
342 /* Utility functions to send a string of hex string to a ctrl */
344 int EVP_PKEY_CTX_str2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *str)
351 return ctx->pmeth->ctrl(ctx, cmd, len, (void *)str);
354 int EVP_PKEY_CTX_hex2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *hex)
360 bin = OPENSSL_hexstr2buf(hex, &binlen);
363 if (binlen <= INT_MAX)
364 rv = ctx->pmeth->ctrl(ctx, cmd, binlen, bin);
369 /* Pass a message digest to a ctrl */
370 int EVP_PKEY_CTX_md(EVP_PKEY_CTX *ctx, int optype, int cmd, const char *md)
374 if (md == NULL || (m = EVP_get_digestbyname(md)) == NULL) {
375 EVPerr(EVP_F_EVP_PKEY_CTX_MD, EVP_R_INVALID_DIGEST);
378 return EVP_PKEY_CTX_ctrl(ctx, -1, optype, cmd, 0, (void *)m);
381 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
383 return ctx->operation;
386 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
388 ctx->keygen_info = dat;
389 ctx->keygen_info_count = datlen;
392 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
397 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
402 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
407 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
412 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
414 ctx->app_data = data;
417 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
419 return ctx->app_data;
422 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
423 int (*init) (EVP_PKEY_CTX *ctx))
428 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
429 int (*copy) (EVP_PKEY_CTX *dst,
435 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
436 void (*cleanup) (EVP_PKEY_CTX *ctx))
438 pmeth->cleanup = cleanup;
441 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
442 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
443 int (*paramgen) (EVP_PKEY_CTX *ctx,
446 pmeth->paramgen_init = paramgen_init;
447 pmeth->paramgen = paramgen;
450 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
451 int (*keygen_init) (EVP_PKEY_CTX *ctx),
452 int (*keygen) (EVP_PKEY_CTX *ctx,
455 pmeth->keygen_init = keygen_init;
456 pmeth->keygen = keygen;
459 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
460 int (*sign_init) (EVP_PKEY_CTX *ctx),
461 int (*sign) (EVP_PKEY_CTX *ctx,
462 unsigned char *sig, size_t *siglen,
463 const unsigned char *tbs,
466 pmeth->sign_init = sign_init;
470 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
471 int (*verify_init) (EVP_PKEY_CTX *ctx),
472 int (*verify) (EVP_PKEY_CTX *ctx,
473 const unsigned char *sig,
475 const unsigned char *tbs,
478 pmeth->verify_init = verify_init;
479 pmeth->verify = verify;
482 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
483 int (*verify_recover_init) (EVP_PKEY_CTX
485 int (*verify_recover) (EVP_PKEY_CTX
494 pmeth->verify_recover_init = verify_recover_init;
495 pmeth->verify_recover = verify_recover;
498 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
499 int (*signctx_init) (EVP_PKEY_CTX *ctx,
501 int (*signctx) (EVP_PKEY_CTX *ctx,
506 pmeth->signctx_init = signctx_init;
507 pmeth->signctx = signctx;
510 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
511 int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
513 int (*verifyctx) (EVP_PKEY_CTX *ctx,
514 const unsigned char *sig,
518 pmeth->verifyctx_init = verifyctx_init;
519 pmeth->verifyctx = verifyctx;
522 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
523 int (*encrypt_init) (EVP_PKEY_CTX *ctx),
524 int (*encryptfn) (EVP_PKEY_CTX *ctx,
527 const unsigned char *in,
530 pmeth->encrypt_init = encrypt_init;
531 pmeth->encrypt = encryptfn;
534 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
535 int (*decrypt_init) (EVP_PKEY_CTX *ctx),
536 int (*decrypt) (EVP_PKEY_CTX *ctx,
539 const unsigned char *in,
542 pmeth->decrypt_init = decrypt_init;
543 pmeth->decrypt = decrypt;
546 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
547 int (*derive_init) (EVP_PKEY_CTX *ctx),
548 int (*derive) (EVP_PKEY_CTX *ctx,
552 pmeth->derive_init = derive_init;
553 pmeth->derive = derive;
556 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
557 int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
559 int (*ctrl_str) (EVP_PKEY_CTX *ctx,
564 pmeth->ctrl_str = ctrl_str;
567 void EVP_PKEY_meth_get_init(EVP_PKEY_METHOD *pmeth,
568 int (**pinit) (EVP_PKEY_CTX *ctx))
570 *pinit = pmeth->init;
573 void EVP_PKEY_meth_get_copy(EVP_PKEY_METHOD *pmeth,
574 int (**pcopy) (EVP_PKEY_CTX *dst,
577 *pcopy = pmeth->copy;
580 void EVP_PKEY_meth_get_cleanup(EVP_PKEY_METHOD *pmeth,
581 void (**pcleanup) (EVP_PKEY_CTX *ctx))
583 *pcleanup = pmeth->cleanup;
586 void EVP_PKEY_meth_get_paramgen(EVP_PKEY_METHOD *pmeth,
587 int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
588 int (**pparamgen) (EVP_PKEY_CTX *ctx,
592 *pparamgen_init = pmeth->paramgen_init;
594 *pparamgen = pmeth->paramgen;
597 void EVP_PKEY_meth_get_keygen(EVP_PKEY_METHOD *pmeth,
598 int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
599 int (**pkeygen) (EVP_PKEY_CTX *ctx,
603 *pkeygen_init = pmeth->keygen_init;
605 *pkeygen = pmeth->keygen;
608 void EVP_PKEY_meth_get_sign(EVP_PKEY_METHOD *pmeth,
609 int (**psign_init) (EVP_PKEY_CTX *ctx),
610 int (**psign) (EVP_PKEY_CTX *ctx,
611 unsigned char *sig, size_t *siglen,
612 const unsigned char *tbs,
616 *psign_init = pmeth->sign_init;
618 *psign = pmeth->sign;
621 void EVP_PKEY_meth_get_verify(EVP_PKEY_METHOD *pmeth,
622 int (**pverify_init) (EVP_PKEY_CTX *ctx),
623 int (**pverify) (EVP_PKEY_CTX *ctx,
624 const unsigned char *sig,
626 const unsigned char *tbs,
630 *pverify_init = pmeth->verify_init;
632 *pverify = pmeth->verify;
635 void EVP_PKEY_meth_get_verify_recover(EVP_PKEY_METHOD *pmeth,
636 int (**pverify_recover_init) (EVP_PKEY_CTX
638 int (**pverify_recover) (EVP_PKEY_CTX
647 if (pverify_recover_init)
648 *pverify_recover_init = pmeth->verify_recover_init;
650 *pverify_recover = pmeth->verify_recover;
653 void EVP_PKEY_meth_get_signctx(EVP_PKEY_METHOD *pmeth,
654 int (**psignctx_init) (EVP_PKEY_CTX *ctx,
656 int (**psignctx) (EVP_PKEY_CTX *ctx,
662 *psignctx_init = pmeth->signctx_init;
664 *psignctx = pmeth->signctx;
667 void EVP_PKEY_meth_get_verifyctx(EVP_PKEY_METHOD *pmeth,
668 int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
670 int (**pverifyctx) (EVP_PKEY_CTX *ctx,
671 const unsigned char *sig,
676 *pverifyctx_init = pmeth->verifyctx_init;
678 *pverifyctx = pmeth->verifyctx;
681 void EVP_PKEY_meth_get_encrypt(EVP_PKEY_METHOD *pmeth,
682 int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
683 int (**pencryptfn) (EVP_PKEY_CTX *ctx,
686 const unsigned char *in,
690 *pencrypt_init = pmeth->encrypt_init;
692 *pencryptfn = pmeth->encrypt;
695 void EVP_PKEY_meth_get_decrypt(EVP_PKEY_METHOD *pmeth,
696 int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
697 int (**pdecrypt) (EVP_PKEY_CTX *ctx,
700 const unsigned char *in,
704 *pdecrypt_init = pmeth->decrypt_init;
706 *pdecrypt = pmeth->decrypt;
709 void EVP_PKEY_meth_get_derive(EVP_PKEY_METHOD *pmeth,
710 int (**pderive_init) (EVP_PKEY_CTX *ctx),
711 int (**pderive) (EVP_PKEY_CTX *ctx,
716 *pderive_init = pmeth->derive_init;
718 *pderive = pmeth->derive;
721 void EVP_PKEY_meth_get_ctrl(EVP_PKEY_METHOD *pmeth,
722 int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
724 int (**pctrl_str) (EVP_PKEY_CTX *ctx,
729 *pctrl = pmeth->ctrl;
731 *pctrl_str = pmeth->ctrl_str;