2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
62 #include <openssl/objects.h>
63 #include <openssl/evp.h>
64 #ifndef OPENSSL_NO_ENGINE
65 #include <openssl/engine.h>
67 #include "asn1_locl.h"
70 typedef int sk_cmp_fn_type(const char * const *a, const char * const *b);
72 DECLARE_STACK_OF(EVP_PKEY_METHOD)
73 STACK_OF(EVP_PKEY_METHOD) *app_pkey_methods = NULL;
75 extern const EVP_PKEY_METHOD rsa_pkey_meth, dh_pkey_meth, dsa_pkey_meth;
76 extern const EVP_PKEY_METHOD ec_pkey_meth, hmac_pkey_meth, cmac_pkey_meth;
78 static const EVP_PKEY_METHOD *standard_methods[] =
80 #ifndef OPENSSL_NO_RSA
86 #ifndef OPENSSL_NO_DSA
96 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
99 static int pmeth_cmp(const EVP_PKEY_METHOD * const *a,
100 const EVP_PKEY_METHOD * const *b)
102 return ((*a)->pkey_id - (*b)->pkey_id);
105 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
108 const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
111 const EVP_PKEY_METHOD *t = &tmp, **ret;
113 if (app_pkey_methods)
116 idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
118 return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
120 ret = OBJ_bsearch_pmeth(&t, standard_methods,
121 sizeof(standard_methods)/sizeof(EVP_PKEY_METHOD *));
127 static EVP_PKEY_CTX *int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id)
130 const EVP_PKEY_METHOD *pmeth;
133 if (!pkey || !pkey->ameth)
135 id = pkey->ameth->pkey_id;
137 #ifndef OPENSSL_NO_ENGINE
138 if (pkey && pkey->engine)
140 /* Try to find an ENGINE which implements this method */
145 EVPerr(EVP_F_INT_CTX_NEW,ERR_R_ENGINE_LIB);
150 e = ENGINE_get_pkey_meth_engine(id);
152 /* If an ENGINE handled this method look it up. Othewise
153 * use internal tables.
157 pmeth = ENGINE_get_pkey_meth(e, id);
160 pmeth = EVP_PKEY_meth_find(id);
164 EVPerr(EVP_F_INT_CTX_NEW,EVP_R_UNSUPPORTED_ALGORITHM);
168 ret = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
171 #ifndef OPENSSL_NO_ENGINE
175 EVPerr(EVP_F_INT_CTX_NEW,ERR_R_MALLOC_FAILURE);
180 ret->operation = EVP_PKEY_OP_UNDEFINED;
185 CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
190 if (pmeth->init(ret) <= 0)
192 EVP_PKEY_CTX_free(ret);
200 EVP_PKEY_METHOD* EVP_PKEY_meth_new(int id, int flags)
202 EVP_PKEY_METHOD *pmeth;
203 pmeth = OPENSSL_malloc(sizeof(EVP_PKEY_METHOD));
208 pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
213 pmeth->paramgen_init = 0;
215 pmeth->keygen_init = 0;
217 pmeth->sign_init = 0;
219 pmeth->verify_init = 0;
221 pmeth->verify_recover_init = 0;
222 pmeth->verify_recover = 0;
223 pmeth->signctx_init = 0;
225 pmeth->verifyctx_init = 0;
226 pmeth->verifyctx = 0;
227 pmeth->encrypt_init = 0;
229 pmeth->decrypt_init = 0;
231 pmeth->derive_init = 0;
239 void EVP_PKEY_meth_get0_info(int *ppkey_id, int *pflags,
240 const EVP_PKEY_METHOD *meth)
243 *ppkey_id = meth->pkey_id;
245 *pflags = meth->flags;
248 void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src)
251 dst->init = src->init;
252 dst->copy = src->copy;
253 dst->cleanup = src->cleanup;
255 dst->paramgen_init = src->paramgen_init;
256 dst->paramgen = src->paramgen;
258 dst->keygen_init = src->keygen_init;
259 dst->keygen = src->keygen;
261 dst->sign_init = src->sign_init;
262 dst->sign = src->sign;
264 dst->verify_init = src->verify_init;
265 dst->verify = src->verify;
267 dst->verify_recover_init = src->verify_recover_init;
268 dst->verify_recover = src->verify_recover;
270 dst->signctx_init = src->signctx_init;
271 dst->signctx = src->signctx;
273 dst->verifyctx_init = src->verifyctx_init;
274 dst->verifyctx = src->verifyctx;
276 dst->encrypt_init = src->encrypt_init;
277 dst->encrypt = src->encrypt;
279 dst->decrypt_init = src->decrypt_init;
280 dst->decrypt = src->decrypt;
282 dst->derive_init = src->derive_init;
283 dst->derive = src->derive;
285 dst->ctrl = src->ctrl;
286 dst->ctrl_str = src->ctrl_str;
289 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
291 if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
295 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
297 return int_ctx_new(pkey, e, -1);
300 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
302 return int_ctx_new(NULL, e, id);
305 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
308 if (!pctx->pmeth || !pctx->pmeth->copy)
310 #ifndef OPENSSL_NO_ENGINE
311 /* Make sure it's safe to copy a pkey context using an ENGINE */
312 if (pctx->engine && !ENGINE_init(pctx->engine))
314 EVPerr(EVP_F_EVP_PKEY_CTX_DUP,ERR_R_ENGINE_LIB);
318 rctx = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
322 rctx->pmeth = pctx->pmeth;
323 #ifndef OPENSSL_NO_ENGINE
324 rctx->engine = pctx->engine;
328 CRYPTO_add(&pctx->pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
330 rctx->pkey = pctx->pkey;
333 CRYPTO_add(&pctx->peerkey->references,1,CRYPTO_LOCK_EVP_PKEY);
335 rctx->peerkey = pctx->peerkey;
338 rctx->app_data = NULL;
339 rctx->operation = pctx->operation;
341 if (pctx->pmeth->copy(rctx, pctx) > 0)
344 EVP_PKEY_CTX_free(rctx);
349 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
351 if (app_pkey_methods == NULL)
353 app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
354 if (!app_pkey_methods)
357 if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
359 sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
363 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
367 if (ctx->pmeth && ctx->pmeth->cleanup)
368 ctx->pmeth->cleanup(ctx);
370 EVP_PKEY_free(ctx->pkey);
372 EVP_PKEY_free(ctx->peerkey);
373 #ifndef OPENSSL_NO_ENGINE
375 /* The EVP_PKEY_CTX we used belongs to an ENGINE, release the
376 * functional reference we held for this reason. */
377 ENGINE_finish(ctx->engine);
382 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
383 int cmd, int p1, void *p2)
386 if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl)
388 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
391 if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
394 if (ctx->operation == EVP_PKEY_OP_UNDEFINED)
396 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
400 if ((optype != -1) && !(ctx->operation & optype))
402 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
406 ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
409 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
415 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
416 const char *name, const char *value)
418 if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str)
420 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR,
421 EVP_R_COMMAND_NOT_SUPPORTED);
424 if (!strcmp(name, "digest"))
427 if (!value || !(md = EVP_get_digestbyname(value)))
429 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR,
430 EVP_R_INVALID_DIGEST);
433 return EVP_PKEY_CTX_set_signature_md(ctx, md);
435 return ctx->pmeth->ctrl_str(ctx, name, value);
438 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
440 return ctx->operation;
443 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
445 ctx->keygen_info = dat;
446 ctx->keygen_info_count = datlen;
449 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
454 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
459 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
464 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
469 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
471 ctx->app_data = data;
474 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
476 return ctx->app_data;
479 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
480 int (*init)(EVP_PKEY_CTX *ctx))
485 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
486 int (*copy)(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src))
491 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
492 void (*cleanup)(EVP_PKEY_CTX *ctx))
494 pmeth->cleanup = cleanup;
497 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
498 int (*paramgen_init)(EVP_PKEY_CTX *ctx),
499 int (*paramgen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
501 pmeth->paramgen_init = paramgen_init;
502 pmeth->paramgen = paramgen;
505 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
506 int (*keygen_init)(EVP_PKEY_CTX *ctx),
507 int (*keygen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
509 pmeth->keygen_init = keygen_init;
510 pmeth->keygen = keygen;
513 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
514 int (*sign_init)(EVP_PKEY_CTX *ctx),
515 int (*sign)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
516 const unsigned char *tbs, size_t tbslen))
518 pmeth->sign_init = sign_init;
522 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
523 int (*verify_init)(EVP_PKEY_CTX *ctx),
524 int (*verify)(EVP_PKEY_CTX *ctx, const unsigned char *sig, size_t siglen,
525 const unsigned char *tbs, size_t tbslen))
527 pmeth->verify_init = verify_init;
528 pmeth->verify = verify;
531 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
532 int (*verify_recover_init)(EVP_PKEY_CTX *ctx),
533 int (*verify_recover)(EVP_PKEY_CTX *ctx,
534 unsigned char *sig, size_t *siglen,
535 const unsigned char *tbs, size_t tbslen))
537 pmeth->verify_recover_init = verify_recover_init;
538 pmeth->verify_recover = verify_recover;
541 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
542 int (*signctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx),
543 int (*signctx)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
546 pmeth->signctx_init = signctx_init;
547 pmeth->signctx = signctx;
550 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
551 int (*verifyctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx),
552 int (*verifyctx)(EVP_PKEY_CTX *ctx, const unsigned char *sig,int siglen,
555 pmeth->verifyctx_init = verifyctx_init;
556 pmeth->verifyctx = verifyctx;
559 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
560 int (*encrypt_init)(EVP_PKEY_CTX *ctx),
561 int (*encryptfn)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
562 const unsigned char *in, size_t inlen))
564 pmeth->encrypt_init = encrypt_init;
565 pmeth->encrypt = encryptfn;
568 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
569 int (*decrypt_init)(EVP_PKEY_CTX *ctx),
570 int (*decrypt)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
571 const unsigned char *in, size_t inlen))
573 pmeth->decrypt_init = decrypt_init;
574 pmeth->decrypt = decrypt;
577 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
578 int (*derive_init)(EVP_PKEY_CTX *ctx),
579 int (*derive)(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen))
581 pmeth->derive_init = derive_init;
582 pmeth->derive = derive;
585 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
586 int (*ctrl)(EVP_PKEY_CTX *ctx, int type, int p1, void *p2),
587 int (*ctrl_str)(EVP_PKEY_CTX *ctx, const char *type, const char *value))
590 pmeth->ctrl_str = ctrl_str;