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 /* Try to find an ENGINE which implements this method */
143 EVPerr(EVP_F_INT_CTX_NEW,ERR_R_ENGINE_LIB);
148 e = ENGINE_get_pkey_meth_engine(id);
150 /* If an ENGINE handled this method look it up. Othewise
151 * use internal tables.
155 pmeth = ENGINE_get_pkey_meth(e, id);
158 pmeth = EVP_PKEY_meth_find(id);
162 EVPerr(EVP_F_INT_CTX_NEW,EVP_R_UNSUPPORTED_ALGORITHM);
166 ret = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
169 #ifndef OPENSSL_NO_ENGINE
173 EVPerr(EVP_F_INT_CTX_NEW,ERR_R_MALLOC_FAILURE);
178 ret->operation = EVP_PKEY_OP_UNDEFINED;
183 CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
188 if (pmeth->init(ret) <= 0)
190 EVP_PKEY_CTX_free(ret);
198 EVP_PKEY_METHOD* EVP_PKEY_meth_new(int id, int flags)
200 EVP_PKEY_METHOD *pmeth;
201 pmeth = OPENSSL_malloc(sizeof(EVP_PKEY_METHOD));
206 pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
211 pmeth->paramgen_init = 0;
213 pmeth->keygen_init = 0;
215 pmeth->sign_init = 0;
217 pmeth->verify_init = 0;
219 pmeth->verify_recover_init = 0;
220 pmeth->verify_recover = 0;
221 pmeth->signctx_init = 0;
223 pmeth->verifyctx_init = 0;
224 pmeth->verifyctx = 0;
225 pmeth->encrypt_init = 0;
227 pmeth->decrypt_init = 0;
229 pmeth->derive_init = 0;
237 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
239 if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
243 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
245 return int_ctx_new(pkey, e, -1);
248 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
250 return int_ctx_new(NULL, e, id);
253 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
256 if (!pctx->pmeth || !pctx->pmeth->copy)
258 #ifndef OPENSSL_NO_ENGINE
259 /* Make sure it's safe to copy a pkey context using an ENGINE */
260 if (pctx->engine && !ENGINE_init(pctx->engine))
262 EVPerr(EVP_F_EVP_PKEY_CTX_DUP,ERR_R_ENGINE_LIB);
266 rctx = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
270 rctx->pmeth = pctx->pmeth;
271 #ifndef OPENSSL_NO_ENGINE
272 rctx->engine = pctx->engine;
276 CRYPTO_add(&pctx->pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
278 rctx->pkey = pctx->pkey;
281 CRYPTO_add(&pctx->peerkey->references,1,CRYPTO_LOCK_EVP_PKEY);
283 rctx->peerkey = pctx->peerkey;
286 rctx->app_data = NULL;
287 rctx->operation = pctx->operation;
289 if (pctx->pmeth->copy(rctx, pctx) > 0)
292 EVP_PKEY_CTX_free(rctx);
297 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
299 if (app_pkey_methods == NULL)
301 app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
302 if (!app_pkey_methods)
305 if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
307 sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
311 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
315 if (ctx->pmeth && ctx->pmeth->cleanup)
316 ctx->pmeth->cleanup(ctx);
318 EVP_PKEY_free(ctx->pkey);
320 EVP_PKEY_free(ctx->peerkey);
321 #ifndef OPENSSL_NO_ENGINE
323 /* The EVP_PKEY_CTX we used belongs to an ENGINE, release the
324 * functional reference we held for this reason. */
325 ENGINE_finish(ctx->engine);
330 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
331 int cmd, int p1, void *p2)
334 if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl)
336 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
339 if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
342 if (ctx->operation == EVP_PKEY_OP_UNDEFINED)
344 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
348 if ((optype != -1) && !(ctx->operation & optype))
350 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
354 ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
357 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
363 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
364 const char *name, const char *value)
366 if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str)
368 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR,
369 EVP_R_COMMAND_NOT_SUPPORTED);
372 if (!strcmp(name, "digest"))
375 if (!value || !(md = EVP_get_digestbyname(value)))
377 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR,
378 EVP_R_INVALID_DIGEST);
381 return EVP_PKEY_CTX_set_signature_md(ctx, md);
383 return ctx->pmeth->ctrl_str(ctx, name, value);
386 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
388 return ctx->operation;
391 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
393 ctx->keygen_info = dat;
394 ctx->keygen_info_count = datlen;
397 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
402 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
407 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
412 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
417 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
419 ctx->app_data = data;
422 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
424 return ctx->app_data;
427 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
428 int (*init)(EVP_PKEY_CTX *ctx))
433 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
434 int (*copy)(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src))
439 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
440 void (*cleanup)(EVP_PKEY_CTX *ctx))
442 pmeth->cleanup = cleanup;
445 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
446 int (*paramgen_init)(EVP_PKEY_CTX *ctx),
447 int (*paramgen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
449 pmeth->paramgen_init = paramgen_init;
450 pmeth->paramgen = paramgen;
453 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
454 int (*keygen_init)(EVP_PKEY_CTX *ctx),
455 int (*keygen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
457 pmeth->keygen_init = keygen_init;
458 pmeth->keygen = keygen;
461 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
462 int (*sign_init)(EVP_PKEY_CTX *ctx),
463 int (*sign)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
464 const unsigned char *tbs, size_t tbslen))
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, const unsigned char *sig, size_t siglen,
473 const unsigned char *tbs, size_t tbslen))
475 pmeth->verify_init = verify_init;
476 pmeth->verify = verify;
479 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
480 int (*verify_recover_init)(EVP_PKEY_CTX *ctx),
481 int (*verify_recover)(EVP_PKEY_CTX *ctx,
482 unsigned char *sig, size_t *siglen,
483 const unsigned char *tbs, size_t tbslen))
485 pmeth->verify_recover_init = verify_recover_init;
486 pmeth->verify_recover = verify_recover;
489 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
490 int (*signctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx),
491 int (*signctx)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
494 pmeth->signctx_init = signctx_init;
495 pmeth->signctx = signctx;
498 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
499 int (*verifyctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx),
500 int (*verifyctx)(EVP_PKEY_CTX *ctx, const unsigned char *sig,int siglen,
503 pmeth->verifyctx_init = verifyctx_init;
504 pmeth->verifyctx = verifyctx;
507 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
508 int (*encrypt_init)(EVP_PKEY_CTX *ctx),
509 int (*encryptfn)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
510 const unsigned char *in, size_t inlen))
512 pmeth->encrypt_init = encrypt_init;
513 pmeth->encrypt = encryptfn;
516 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
517 int (*decrypt_init)(EVP_PKEY_CTX *ctx),
518 int (*decrypt)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
519 const unsigned char *in, size_t inlen))
521 pmeth->decrypt_init = decrypt_init;
522 pmeth->decrypt = decrypt;
525 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
526 int (*derive_init)(EVP_PKEY_CTX *ctx),
527 int (*derive)(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen))
529 pmeth->derive_init = derive_init;
530 pmeth->derive = derive;
533 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
534 int (*ctrl)(EVP_PKEY_CTX *ctx, int type, int p1, void *p2),
535 int (*ctrl_str)(EVP_PKEY_CTX *ctx, const char *type, const char *value))
538 pmeth->ctrl_str = ctrl_str;