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
51 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
54 static int pmeth_cmp(const EVP_PKEY_METHOD *const *a,
55 const EVP_PKEY_METHOD *const *b)
57 return ((*a)->pkey_id - (*b)->pkey_id);
60 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
63 const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
66 const EVP_PKEY_METHOD *t = &tmp, **ret;
68 if (app_pkey_methods) {
70 idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
72 return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
74 ret = OBJ_bsearch_pmeth(&t, standard_methods,
75 sizeof(standard_methods) /
76 sizeof(EVP_PKEY_METHOD *));
82 static EVP_PKEY_CTX *int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id)
85 const EVP_PKEY_METHOD *pmeth;
87 if (!pkey || !pkey->ameth)
89 id = pkey->ameth->pkey_id;
91 #ifndef OPENSSL_NO_ENGINE
92 if (pkey && pkey->engine)
94 /* Try to find an ENGINE which implements this method */
96 if (!ENGINE_init(e)) {
97 EVPerr(EVP_F_INT_CTX_NEW, ERR_R_ENGINE_LIB);
101 e = ENGINE_get_pkey_meth_engine(id);
104 * If an ENGINE handled this method look it up. Otherwise use internal
109 pmeth = ENGINE_get_pkey_meth(e, id);
112 pmeth = EVP_PKEY_meth_find(id);
115 EVPerr(EVP_F_INT_CTX_NEW, EVP_R_UNSUPPORTED_ALGORITHM);
119 ret = OPENSSL_zalloc(sizeof(*ret));
121 #ifndef OPENSSL_NO_ENGINE
124 EVPerr(EVP_F_INT_CTX_NEW, ERR_R_MALLOC_FAILURE);
129 ret->operation = EVP_PKEY_OP_UNDEFINED;
132 EVP_PKEY_up_ref(pkey);
135 if (pmeth->init(ret) <= 0) {
137 EVP_PKEY_CTX_free(ret);
145 EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags)
147 EVP_PKEY_METHOD *pmeth;
149 pmeth = OPENSSL_zalloc(sizeof(*pmeth));
154 pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
158 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
159 const EVP_PKEY_METHOD *meth)
162 *ppkey_id = meth->pkey_id;
164 *pflags = meth->flags;
167 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
170 dst->init = src->init;
171 dst->copy = src->copy;
172 dst->cleanup = src->cleanup;
174 dst->paramgen_init = src->paramgen_init;
175 dst->paramgen = src->paramgen;
177 dst->keygen_init = src->keygen_init;
178 dst->keygen = src->keygen;
180 dst->sign_init = src->sign_init;
181 dst->sign = src->sign;
183 dst->verify_init = src->verify_init;
184 dst->verify = src->verify;
186 dst->verify_recover_init = src->verify_recover_init;
187 dst->verify_recover = src->verify_recover;
189 dst->signctx_init = src->signctx_init;
190 dst->signctx = src->signctx;
192 dst->verifyctx_init = src->verifyctx_init;
193 dst->verifyctx = src->verifyctx;
195 dst->encrypt_init = src->encrypt_init;
196 dst->encrypt = src->encrypt;
198 dst->decrypt_init = src->decrypt_init;
199 dst->decrypt = src->decrypt;
201 dst->derive_init = src->derive_init;
202 dst->derive = src->derive;
204 dst->ctrl = src->ctrl;
205 dst->ctrl_str = src->ctrl_str;
208 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
210 if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
214 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
216 return int_ctx_new(pkey, e, -1);
219 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
221 return int_ctx_new(NULL, e, id);
224 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
227 if (!pctx->pmeth || !pctx->pmeth->copy)
229 #ifndef OPENSSL_NO_ENGINE
230 /* Make sure it's safe to copy a pkey context using an ENGINE */
231 if (pctx->engine && !ENGINE_init(pctx->engine)) {
232 EVPerr(EVP_F_EVP_PKEY_CTX_DUP, ERR_R_ENGINE_LIB);
236 rctx = OPENSSL_malloc(sizeof(*rctx));
240 rctx->pmeth = pctx->pmeth;
241 #ifndef OPENSSL_NO_ENGINE
242 rctx->engine = pctx->engine;
246 EVP_PKEY_up_ref(pctx->pkey);
248 rctx->pkey = pctx->pkey;
251 EVP_PKEY_up_ref(pctx->peerkey);
253 rctx->peerkey = pctx->peerkey;
256 rctx->app_data = NULL;
257 rctx->operation = pctx->operation;
259 if (pctx->pmeth->copy(rctx, pctx) > 0)
263 EVP_PKEY_CTX_free(rctx);
268 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
270 if (app_pkey_methods == NULL) {
271 app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
272 if (app_pkey_methods == NULL)
275 if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
277 sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
281 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
285 if (ctx->pmeth && ctx->pmeth->cleanup)
286 ctx->pmeth->cleanup(ctx);
287 EVP_PKEY_free(ctx->pkey);
288 EVP_PKEY_free(ctx->peerkey);
289 #ifndef OPENSSL_NO_ENGINE
290 ENGINE_finish(ctx->engine);
295 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
296 int cmd, int p1, void *p2)
299 if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl) {
300 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
303 if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
306 if (ctx->operation == EVP_PKEY_OP_UNDEFINED) {
307 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
311 if ((optype != -1) && !(ctx->operation & optype)) {
312 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
316 ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
319 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
325 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
326 const char *name, const char *value)
328 if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) {
329 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_COMMAND_NOT_SUPPORTED);
332 if (strcmp(name, "digest") == 0) {
334 if (value == NULL || (md = EVP_get_digestbyname(value)) == NULL) {
335 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, EVP_R_INVALID_DIGEST);
338 return EVP_PKEY_CTX_set_signature_md(ctx, md);
340 return ctx->pmeth->ctrl_str(ctx, name, value);
343 /* Utility functions to send a string of hex string to a ctrl */
345 int EVP_PKEY_CTX_str2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *str)
352 return ctx->pmeth->ctrl(ctx, cmd, len, (void *)str);
355 int EVP_PKEY_CTX_hex2ctrl(EVP_PKEY_CTX *ctx, int cmd, const char *hex)
361 bin = OPENSSL_hexstr2buf(hex, &binlen);
364 if (binlen <= INT_MAX)
365 rv = ctx->pmeth->ctrl(ctx, cmd, binlen, bin);
370 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
372 return ctx->operation;
375 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
377 ctx->keygen_info = dat;
378 ctx->keygen_info_count = datlen;
381 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
386 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
391 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
396 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
401 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
403 ctx->app_data = data;
406 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
408 return ctx->app_data;
411 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
412 int (*init) (EVP_PKEY_CTX *ctx))
417 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
418 int (*copy) (EVP_PKEY_CTX *dst,
424 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
425 void (*cleanup) (EVP_PKEY_CTX *ctx))
427 pmeth->cleanup = cleanup;
430 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
431 int (*paramgen_init) (EVP_PKEY_CTX *ctx),
432 int (*paramgen) (EVP_PKEY_CTX *ctx,
435 pmeth->paramgen_init = paramgen_init;
436 pmeth->paramgen = paramgen;
439 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
440 int (*keygen_init) (EVP_PKEY_CTX *ctx),
441 int (*keygen) (EVP_PKEY_CTX *ctx,
444 pmeth->keygen_init = keygen_init;
445 pmeth->keygen = keygen;
448 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
449 int (*sign_init) (EVP_PKEY_CTX *ctx),
450 int (*sign) (EVP_PKEY_CTX *ctx,
451 unsigned char *sig, size_t *siglen,
452 const unsigned char *tbs,
455 pmeth->sign_init = sign_init;
459 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
460 int (*verify_init) (EVP_PKEY_CTX *ctx),
461 int (*verify) (EVP_PKEY_CTX *ctx,
462 const unsigned char *sig,
464 const unsigned char *tbs,
467 pmeth->verify_init = verify_init;
468 pmeth->verify = verify;
471 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
472 int (*verify_recover_init) (EVP_PKEY_CTX
474 int (*verify_recover) (EVP_PKEY_CTX
483 pmeth->verify_recover_init = verify_recover_init;
484 pmeth->verify_recover = verify_recover;
487 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
488 int (*signctx_init) (EVP_PKEY_CTX *ctx,
490 int (*signctx) (EVP_PKEY_CTX *ctx,
495 pmeth->signctx_init = signctx_init;
496 pmeth->signctx = signctx;
499 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
500 int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
502 int (*verifyctx) (EVP_PKEY_CTX *ctx,
503 const unsigned char *sig,
507 pmeth->verifyctx_init = verifyctx_init;
508 pmeth->verifyctx = verifyctx;
511 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
512 int (*encrypt_init) (EVP_PKEY_CTX *ctx),
513 int (*encryptfn) (EVP_PKEY_CTX *ctx,
516 const unsigned char *in,
519 pmeth->encrypt_init = encrypt_init;
520 pmeth->encrypt = encryptfn;
523 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
524 int (*decrypt_init) (EVP_PKEY_CTX *ctx),
525 int (*decrypt) (EVP_PKEY_CTX *ctx,
528 const unsigned char *in,
531 pmeth->decrypt_init = decrypt_init;
532 pmeth->decrypt = decrypt;
535 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
536 int (*derive_init) (EVP_PKEY_CTX *ctx),
537 int (*derive) (EVP_PKEY_CTX *ctx,
541 pmeth->derive_init = derive_init;
542 pmeth->derive = derive;
545 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
546 int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
548 int (*ctrl_str) (EVP_PKEY_CTX *ctx,
553 pmeth->ctrl_str = ctrl_str;
556 void EVP_PKEY_meth_get_init(EVP_PKEY_METHOD *pmeth,
557 int (**pinit) (EVP_PKEY_CTX *ctx))
559 *pinit = pmeth->init;
562 void EVP_PKEY_meth_get_copy(EVP_PKEY_METHOD *pmeth,
563 int (**pcopy) (EVP_PKEY_CTX *dst,
566 *pcopy = pmeth->copy;
569 void EVP_PKEY_meth_get_cleanup(EVP_PKEY_METHOD *pmeth,
570 void (**pcleanup) (EVP_PKEY_CTX *ctx))
572 *pcleanup = pmeth->cleanup;
575 void EVP_PKEY_meth_get_paramgen(EVP_PKEY_METHOD *pmeth,
576 int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
577 int (**pparamgen) (EVP_PKEY_CTX *ctx,
581 *pparamgen_init = pmeth->paramgen_init;
583 *pparamgen = pmeth->paramgen;
586 void EVP_PKEY_meth_get_keygen(EVP_PKEY_METHOD *pmeth,
587 int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
588 int (**pkeygen) (EVP_PKEY_CTX *ctx,
592 *pkeygen_init = pmeth->keygen_init;
594 *pkeygen = pmeth->keygen;
597 void EVP_PKEY_meth_get_sign(EVP_PKEY_METHOD *pmeth,
598 int (**psign_init) (EVP_PKEY_CTX *ctx),
599 int (**psign) (EVP_PKEY_CTX *ctx,
600 unsigned char *sig, size_t *siglen,
601 const unsigned char *tbs,
605 *psign_init = pmeth->sign_init;
607 *psign = pmeth->sign;
610 void EVP_PKEY_meth_get_verify(EVP_PKEY_METHOD *pmeth,
611 int (**pverify_init) (EVP_PKEY_CTX *ctx),
612 int (**pverify) (EVP_PKEY_CTX *ctx,
613 const unsigned char *sig,
615 const unsigned char *tbs,
619 *pverify_init = pmeth->verify_init;
621 *pverify = pmeth->verify;
624 void EVP_PKEY_meth_get_verify_recover(EVP_PKEY_METHOD *pmeth,
625 int (**pverify_recover_init) (EVP_PKEY_CTX
627 int (**pverify_recover) (EVP_PKEY_CTX
636 if (pverify_recover_init)
637 *pverify_recover_init = pmeth->verify_recover_init;
639 *pverify_recover = pmeth->verify_recover;
642 void EVP_PKEY_meth_get_signctx(EVP_PKEY_METHOD *pmeth,
643 int (**psignctx_init) (EVP_PKEY_CTX *ctx,
645 int (**psignctx) (EVP_PKEY_CTX *ctx,
651 *psignctx_init = pmeth->signctx_init;
653 *psignctx = pmeth->signctx;
656 void EVP_PKEY_meth_get_verifyctx(EVP_PKEY_METHOD *pmeth,
657 int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
659 int (**pverifyctx) (EVP_PKEY_CTX *ctx,
660 const unsigned char *sig,
665 *pverifyctx_init = pmeth->verifyctx_init;
667 *pverifyctx = pmeth->verifyctx;
670 void EVP_PKEY_meth_get_encrypt(EVP_PKEY_METHOD *pmeth,
671 int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
672 int (**pencryptfn) (EVP_PKEY_CTX *ctx,
675 const unsigned char *in,
679 *pencrypt_init = pmeth->encrypt_init;
681 *pencryptfn = pmeth->encrypt;
684 void EVP_PKEY_meth_get_decrypt(EVP_PKEY_METHOD *pmeth,
685 int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
686 int (**pdecrypt) (EVP_PKEY_CTX *ctx,
689 const unsigned char *in,
693 *pdecrypt_init = pmeth->decrypt_init;
695 *pdecrypt = pmeth->decrypt;
698 void EVP_PKEY_meth_get_derive(EVP_PKEY_METHOD *pmeth,
699 int (**pderive_init) (EVP_PKEY_CTX *ctx),
700 int (**pderive) (EVP_PKEY_CTX *ctx,
705 *pderive_init = pmeth->derive_init;
707 *pderive = pmeth->derive;
710 void EVP_PKEY_meth_get_ctrl(EVP_PKEY_METHOD *pmeth,
711 int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
713 int (**pctrl_str) (EVP_PKEY_CTX *ctx,
718 *pctrl = pmeth->ctrl;
720 *pctrl_str = pmeth->ctrl_str;