2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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[] =
87 DECLARE_OBJ_BSEARCH_CMP_FN(EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
90 static int pmeth_cmp(const EVP_PKEY_METHOD * const *a,
91 const EVP_PKEY_METHOD * const *b)
93 return ((*a)->pkey_id - (*b)->pkey_id);
96 IMPLEMENT_OBJ_BSEARCH_CMP_FN(EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
99 const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
101 EVP_PKEY_METHOD tmp, *t = &tmp;
102 const EVP_PKEY_METHOD **ret;
104 if (app_pkey_methods)
107 idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
109 return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
111 ret = OBJ_bsearch(EVP_PKEY_METHOD *, &t,
112 const EVP_PKEY_METHOD *, standard_methods,
113 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 /* Try to find an ENGINE which implements this method */
135 EVPerr(EVP_F_INT_CTX_NEW,ERR_R_ENGINE_LIB);
140 e = ENGINE_get_pkey_meth_engine(id);
142 /* If an ENGINE handled this method look it up. Othewise
143 * use internal tables.
147 pmeth = ENGINE_get_pkey_meth(e, id);
149 pmeth = EVP_PKEY_meth_find(id);
153 EVPerr(EVP_F_INT_CTX_NEW,EVP_R_UNSUPPORTED_ALGORITHM);
157 ret = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
162 EVPerr(EVP_F_INT_CTX_NEW,ERR_R_MALLOC_FAILURE);
167 ret->operation = EVP_PKEY_OP_UNDEFINED;
171 CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
176 if (pmeth->init(ret) <= 0)
178 EVP_PKEY_CTX_free(ret);
186 EVP_PKEY_METHOD* EVP_PKEY_meth_new(int id, int flags)
188 EVP_PKEY_METHOD *pmeth;
189 pmeth = OPENSSL_malloc(sizeof(EVP_PKEY_METHOD));
194 pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
199 pmeth->paramgen_init = 0;
201 pmeth->keygen_init = 0;
203 pmeth->sign_init = 0;
205 pmeth->verify_init = 0;
207 pmeth->verify_recover_init = 0;
208 pmeth->verify_recover = 0;
209 pmeth->signctx_init = 0;
211 pmeth->verifyctx_init = 0;
212 pmeth->verifyctx = 0;
213 pmeth->encrypt_init = 0;
215 pmeth->decrypt_init = 0;
217 pmeth->derive_init = 0;
225 void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
227 if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
231 EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
233 return int_ctx_new(pkey, e, -1);
236 EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
238 return int_ctx_new(NULL, e, id);
241 EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
244 if (!pctx->pmeth || !pctx->pmeth->copy)
246 #ifndef OPENSSL_NO_ENGINE
247 /* Make sure it's safe to copy a pkey context using an ENGINE */
248 if (pctx->engine && !ENGINE_init(pctx->engine))
250 EVPerr(EVP_F_EVP_PKEY_CTX_DUP,ERR_R_ENGINE_LIB);
254 rctx = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
258 rctx->pmeth = pctx->pmeth;
259 #ifndef OPENSSL_NO_ENGINE
260 rctx->engine = pctx->engine;
264 CRYPTO_add(&pctx->pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
266 rctx->pkey = pctx->pkey;
269 CRYPTO_add(&pctx->peerkey->references,1,CRYPTO_LOCK_EVP_PKEY);
271 rctx->peerkey = pctx->peerkey;
274 rctx->app_data = NULL;
275 rctx->operation = pctx->operation;
277 if (pctx->pmeth->copy(rctx, pctx) > 0)
280 EVP_PKEY_CTX_free(rctx);
285 int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
287 if (app_pkey_methods == NULL)
289 app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
290 if (!app_pkey_methods)
293 if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
295 sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
299 void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
303 if (ctx->pmeth && ctx->pmeth->cleanup)
304 ctx->pmeth->cleanup(ctx);
306 EVP_PKEY_free(ctx->pkey);
308 EVP_PKEY_free(ctx->peerkey);
309 #ifndef OPENSSL_NO_ENGINE
311 /* The EVP_PKEY_CTX we used belongs to an ENGINE, release the
312 * functional reference we held for this reason. */
313 ENGINE_finish(ctx->engine);
318 int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
319 int cmd, int p1, void *p2)
322 if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl)
324 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
327 if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
330 if (ctx->operation == EVP_PKEY_OP_UNDEFINED)
332 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
336 if ((optype != -1) && !(ctx->operation & optype))
338 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
342 ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
345 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
351 int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
352 const char *name, const char *value)
354 if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str)
356 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR,
357 EVP_R_COMMAND_NOT_SUPPORTED);
360 if (!strcmp(name, "digest"))
363 if (!value || !(md = EVP_get_digestbyname(value)))
365 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR,
366 EVP_R_INVALID_DIGEST);
369 return EVP_PKEY_CTX_set_signature_md(ctx, md);
371 return ctx->pmeth->ctrl_str(ctx, name, value);
374 int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
376 return ctx->operation;
379 void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
381 ctx->keygen_info = dat;
382 ctx->keygen_info_count = datlen;
385 void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
390 void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
395 EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
400 EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
405 void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
407 ctx->app_data = data;
410 void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
412 return ctx->app_data;
415 void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
416 int (*init)(EVP_PKEY_CTX *ctx))
421 void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
422 int (*copy)(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src))
427 void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
428 void (*cleanup)(EVP_PKEY_CTX *ctx))
430 pmeth->cleanup = cleanup;
433 void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
434 int (*paramgen_init)(EVP_PKEY_CTX *ctx),
435 int (*paramgen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
437 pmeth->paramgen_init = paramgen_init;
438 pmeth->paramgen = paramgen;
441 void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
442 int (*keygen_init)(EVP_PKEY_CTX *ctx),
443 int (*keygen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
445 pmeth->keygen_init = keygen_init;
446 pmeth->keygen = keygen;
449 void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
450 int (*sign_init)(EVP_PKEY_CTX *ctx),
451 int (*sign)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
452 const unsigned char *tbs, size_t tbslen))
454 pmeth->sign_init = sign_init;
458 void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
459 int (*verify_init)(EVP_PKEY_CTX *ctx),
460 int (*verify)(EVP_PKEY_CTX *ctx, const unsigned char *sig, size_t siglen,
461 const unsigned char *tbs, size_t tbslen))
463 pmeth->verify_init = verify_init;
464 pmeth->verify = verify;
467 void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
468 int (*verify_recover_init)(EVP_PKEY_CTX *ctx),
469 int (*verify_recover)(EVP_PKEY_CTX *ctx,
470 unsigned char *sig, size_t *siglen,
471 const unsigned char *tbs, size_t tbslen))
473 pmeth->verify_recover_init = verify_recover_init;
474 pmeth->verify_recover = verify_recover;
477 void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
478 int (*signctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx),
479 int (*signctx)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
482 pmeth->signctx_init = signctx_init;
483 pmeth->signctx = signctx;
486 void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
487 int (*verifyctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx),
488 int (*verifyctx)(EVP_PKEY_CTX *ctx, const unsigned char *sig,int siglen,
491 pmeth->verifyctx_init = verifyctx_init;
492 pmeth->verifyctx = verifyctx;
495 void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
496 int (*encrypt_init)(EVP_PKEY_CTX *ctx),
497 int (*encrypt)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
498 const unsigned char *in, size_t inlen))
500 pmeth->encrypt_init = encrypt_init;
501 pmeth->encrypt = encrypt;
504 void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
505 int (*decrypt_init)(EVP_PKEY_CTX *ctx),
506 int (*decrypt)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
507 const unsigned char *in, size_t inlen))
509 pmeth->decrypt_init = decrypt_init;
510 pmeth->decrypt = decrypt;
513 void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
514 int (*derive_init)(EVP_PKEY_CTX *ctx),
515 int (*derive)(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen))
517 pmeth->derive_init = derive_init;
518 pmeth->derive = derive;
521 void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
522 int (*ctrl)(EVP_PKEY_CTX *ctx, int type, int p1, void *p2),
523 int (*ctrl_str)(EVP_PKEY_CTX *ctx, const char *type, const char *value))
526 pmeth->ctrl_str = ctrl_str;