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;
78 static const EVP_PKEY_METHOD *standard_methods[] =
89 DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
92 static int pmeth_cmp(const EVP_PKEY_METHOD * const *a,
93 const EVP_PKEY_METHOD * const *b)
95 return ((*a)->pkey_id - (*b)->pkey_id);
98 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
101 const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
104 const EVP_PKEY_METHOD *t = &tmp, **ret;
106 if (app_pkey_methods)
109 idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
111 return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
113 ret = OBJ_bsearch_pmeth(&t, standard_methods,
114 sizeof(standard_methods)/sizeof(EVP_PKEY_METHOD *));
120 static EVP_PKEY_CTX *int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id)
123 const EVP_PKEY_METHOD *pmeth;
126 if (!pkey || !pkey->ameth)
128 id = pkey->ameth->pkey_id;
130 #ifndef OPENSSL_NO_ENGINE
131 /* Try to find an ENGINE which implements this method */
136 EVPerr(EVP_F_INT_CTX_NEW,ERR_R_ENGINE_LIB);
141 e = ENGINE_get_pkey_meth_engine(id);
143 /* If an ENGINE handled this method look it up. Othewise
144 * use internal tables.
148 pmeth = ENGINE_get_pkey_meth(e, id);
151 pmeth = EVP_PKEY_meth_find(id);
155 EVPerr(EVP_F_INT_CTX_NEW,EVP_R_UNSUPPORTED_ALGORITHM);
159 ret = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
162 #ifndef OPENSSL_NO_ENGINE
166 EVPerr(EVP_F_INT_CTX_NEW,ERR_R_MALLOC_FAILURE);
171 ret->operation = EVP_PKEY_OP_UNDEFINED;
175 CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
180 if (pmeth->init(ret) <= 0)
182 EVP_PKEY_CTX_free(ret);
190 EVP_PKEY_METHOD* EVP_PKEY_meth_new(int id, int flags)
192 EVP_PKEY_METHOD *pmeth;
193 pmeth = OPENSSL_malloc(sizeof(EVP_PKEY_METHOD));
198 pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
203 pmeth->paramgen_init = 0;
205 pmeth->keygen_init = 0;
207 pmeth->sign_init = 0;
209 pmeth->verify_init = 0;
211 pmeth->verify_recover_init = 0;
212 pmeth->verify_recover = 0;
213 pmeth->signctx_init = 0;
215 pmeth->verifyctx_init = 0;
216 pmeth->verifyctx = 0;
217 pmeth->encrypt_init = 0;
219 pmeth->decrypt_init = 0;
221 pmeth->derive_init = 0;
229 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
231 if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
235 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
237 return int_ctx_new(pkey, e, -1);
240 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
242 return int_ctx_new(NULL, e, id);
245 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
248 if (!pctx->pmeth || !pctx->pmeth->copy)
250 #ifndef OPENSSL_NO_ENGINE
251 /* Make sure it's safe to copy a pkey context using an ENGINE */
252 if (pctx->engine && !ENGINE_init(pctx->engine))
254 EVPerr(EVP_F_EVP_PKEY_CTX_DUP,ERR_R_ENGINE_LIB);
258 rctx = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
262 rctx->pmeth = pctx->pmeth;
263 #ifndef OPENSSL_NO_ENGINE
264 rctx->engine = pctx->engine;
268 CRYPTO_add(&pctx->pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
270 rctx->pkey = pctx->pkey;
273 CRYPTO_add(&pctx->peerkey->references,1,CRYPTO_LOCK_EVP_PKEY);
275 rctx->peerkey = pctx->peerkey;
278 rctx->app_data = NULL;
279 rctx->operation = pctx->operation;
281 if (pctx->pmeth->copy(rctx, pctx) > 0)
284 EVP_PKEY_CTX_free(rctx);
289 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
291 if (app_pkey_methods == NULL)
293 app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
294 if (!app_pkey_methods)
297 if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
299 sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
303 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
307 if (ctx->pmeth && ctx->pmeth->cleanup)
308 ctx->pmeth->cleanup(ctx);
310 EVP_PKEY_free(ctx->pkey);
312 EVP_PKEY_free(ctx->peerkey);
313 #ifndef OPENSSL_NO_ENGINE
315 /* The EVP_PKEY_CTX we used belongs to an ENGINE, release the
316 * functional reference we held for this reason. */
317 ENGINE_finish(ctx->engine);
322 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
323 int cmd, int p1, void *p2)
326 if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl)
328 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
331 if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
334 if (ctx->operation == EVP_PKEY_OP_UNDEFINED)
336 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
340 if ((optype != -1) && !(ctx->operation & optype))
342 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
346 ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
349 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
355 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
356 const char *name, const char *value)
358 if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str)
360 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR,
361 EVP_R_COMMAND_NOT_SUPPORTED);
364 if (!strcmp(name, "digest"))
367 if (!value || !(md = EVP_get_digestbyname(value)))
369 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR,
370 EVP_R_INVALID_DIGEST);
373 return EVP_PKEY_CTX_set_signature_md(ctx, md);
375 return ctx->pmeth->ctrl_str(ctx, name, value);
378 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
380 return ctx->operation;
383 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
385 ctx->keygen_info = dat;
386 ctx->keygen_info_count = datlen;
389 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
394 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
399 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
404 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
409 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
411 ctx->app_data = data;
414 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
416 return ctx->app_data;
419 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
420 int (*init)(EVP_PKEY_CTX *ctx))
425 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
426 int (*copy)(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src))
431 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
432 void (*cleanup)(EVP_PKEY_CTX *ctx))
434 pmeth->cleanup = cleanup;
437 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
438 int (*paramgen_init)(EVP_PKEY_CTX *ctx),
439 int (*paramgen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
441 pmeth->paramgen_init = paramgen_init;
442 pmeth->paramgen = paramgen;
445 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
446 int (*keygen_init)(EVP_PKEY_CTX *ctx),
447 int (*keygen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
449 pmeth->keygen_init = keygen_init;
450 pmeth->keygen = keygen;
453 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
454 int (*sign_init)(EVP_PKEY_CTX *ctx),
455 int (*sign)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
456 const unsigned char *tbs, size_t tbslen))
458 pmeth->sign_init = sign_init;
462 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
463 int (*verify_init)(EVP_PKEY_CTX *ctx),
464 int (*verify)(EVP_PKEY_CTX *ctx, const unsigned char *sig, size_t siglen,
465 const unsigned char *tbs, size_t tbslen))
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 *ctx),
473 int (*verify_recover)(EVP_PKEY_CTX *ctx,
474 unsigned char *sig, size_t *siglen,
475 const unsigned char *tbs, size_t tbslen))
477 pmeth->verify_recover_init = verify_recover_init;
478 pmeth->verify_recover = verify_recover;
481 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
482 int (*signctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx),
483 int (*signctx)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
486 pmeth->signctx_init = signctx_init;
487 pmeth->signctx = signctx;
490 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
491 int (*verifyctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx),
492 int (*verifyctx)(EVP_PKEY_CTX *ctx, const unsigned char *sig,int siglen,
495 pmeth->verifyctx_init = verifyctx_init;
496 pmeth->verifyctx = verifyctx;
499 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
500 int (*encrypt_init)(EVP_PKEY_CTX *ctx),
501 int (*encryptfn)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
502 const unsigned char *in, size_t inlen))
504 pmeth->encrypt_init = encrypt_init;
505 pmeth->encrypt = encryptfn;
508 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
509 int (*decrypt_init)(EVP_PKEY_CTX *ctx),
510 int (*decrypt)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
511 const unsigned char *in, size_t inlen))
513 pmeth->decrypt_init = decrypt_init;
514 pmeth->decrypt = decrypt;
517 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
518 int (*derive_init)(EVP_PKEY_CTX *ctx),
519 int (*derive)(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen))
521 pmeth->derive_init = derive_init;
522 pmeth->derive = derive;
525 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
526 int (*ctrl)(EVP_PKEY_CTX *ctx, int type, int p1, void *p2),
527 int (*ctrl_str)(EVP_PKEY_CTX *ctx, const char *type, const char *value))
530 pmeth->ctrl_str = ctrl_str;