source: openssl/trunk/crypto/evp/pmeth_lib.c@ 808

Last change on this file since 808 was 808, checked in by dmik, 11 years ago

openssl: Merge version 1.0.0n from vendor to trunk.
File size: 13.5 KB
Line 
1/* pmeth_lib.c */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 2006.
4 */
5/* ====================================================================
6 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
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
18 * distribution.
19 *
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/)"
24 *
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.
29 *
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.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
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 * ====================================================================
52 *
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).
56 *
57 */
58
59#include <stdio.h>
60#include <stdlib.h>
61#include "cryptlib.h"
62#include <openssl/objects.h>
63#include <openssl/evp.h>
64#ifndef OPENSSL_NO_ENGINE
65#include <openssl/engine.h>
66#endif
67#include "asn1_locl.h"
68#include "evp_locl.h"
69
70typedef int sk_cmp_fn_type(const char * const *a, const char * const *b);
71
72DECLARE_STACK_OF(EVP_PKEY_METHOD)
73STACK_OF(EVP_PKEY_METHOD) *app_pkey_methods = NULL;
74
75extern const EVP_PKEY_METHOD rsa_pkey_meth, dh_pkey_meth, dsa_pkey_meth;
76extern const EVP_PKEY_METHOD ec_pkey_meth, hmac_pkey_meth;
77
78static const EVP_PKEY_METHOD *standard_methods[] =
79 {
80#ifndef OPENSSL_NO_RSA
81 &rsa_pkey_meth,
82#endif
83#ifndef OPENSSL_NO_DH
84 &dh_pkey_meth,
85#endif
86#ifndef OPENSSL_NO_DSA
87 &dsa_pkey_meth,
88#endif
89#ifndef OPENSSL_NO_EC
90 &ec_pkey_meth,
91#endif
92 &hmac_pkey_meth,
93 };
94
95DECLARE_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
96 pmeth);
97
98static int pmeth_cmp(const EVP_PKEY_METHOD * const *a,
99 const EVP_PKEY_METHOD * const *b)
100 {
101 return ((*a)->pkey_id - (*b)->pkey_id);
102 }
103
104IMPLEMENT_OBJ_BSEARCH_CMP_FN(const EVP_PKEY_METHOD *, const EVP_PKEY_METHOD *,
105 pmeth);
106
107const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type)
108 {
109 EVP_PKEY_METHOD tmp;
110 const EVP_PKEY_METHOD *t = &tmp, **ret;
111 tmp.pkey_id = type;
112 if (app_pkey_methods)
113 {
114 int idx;
115 idx = sk_EVP_PKEY_METHOD_find(app_pkey_methods, &tmp);
116 if (idx >= 0)
117 return sk_EVP_PKEY_METHOD_value(app_pkey_methods, idx);
118 }
119 ret = OBJ_bsearch_pmeth(&t, standard_methods,
120 sizeof(standard_methods)/sizeof(EVP_PKEY_METHOD *));
121 if (!ret || !*ret)
122 return NULL;
123 return *ret;
124 }
125
126static EVP_PKEY_CTX *int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id)
127 {
128 EVP_PKEY_CTX *ret;
129 const EVP_PKEY_METHOD *pmeth;
130 if (id == -1)
131 {
132 if (!pkey || !pkey->ameth)
133 return NULL;
134 id = pkey->ameth->pkey_id;
135 }
136#ifndef OPENSSL_NO_ENGINE
137 if (pkey && pkey->engine)
138 e = pkey->engine;
139 /* Try to find an ENGINE which implements this method */
140 if (e)
141 {
142 if (!ENGINE_init(e))
143 {
144 EVPerr(EVP_F_INT_CTX_NEW,ERR_R_ENGINE_LIB);
145 return NULL;
146 }
147 }
148 else
149 e = ENGINE_get_pkey_meth_engine(id);
150
151 /* If an ENGINE handled this method look it up. Othewise
152 * use internal tables.
153 */
154
155 if (e)
156 pmeth = ENGINE_get_pkey_meth(e, id);
157 else
158#endif
159 pmeth = EVP_PKEY_meth_find(id);
160
161 if (pmeth == NULL)
162 {
163 EVPerr(EVP_F_INT_CTX_NEW,EVP_R_UNSUPPORTED_ALGORITHM);
164 return NULL;
165 }
166
167 ret = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
168 if (!ret)
169 {
170#ifndef OPENSSL_NO_ENGINE
171 if (e)
172 ENGINE_finish(e);
173#endif
174 EVPerr(EVP_F_INT_CTX_NEW,ERR_R_MALLOC_FAILURE);
175 return NULL;
176 }
177 ret->engine = e;
178 ret->pmeth = pmeth;
179 ret->operation = EVP_PKEY_OP_UNDEFINED;
180 ret->pkey = pkey;
181 ret->peerkey = NULL;
182 ret->pkey_gencb = 0;
183 if (pkey)
184 CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
185 ret->data = NULL;
186
187 if (pmeth->init)
188 {
189 if (pmeth->init(ret) <= 0)
190 {
191 EVP_PKEY_CTX_free(ret);
192 return NULL;
193 }
194 }
195
196 return ret;
197 }
198
199EVP_PKEY_METHOD* EVP_PKEY_meth_new(int id, int flags)
200 {
201 EVP_PKEY_METHOD *pmeth;
202 pmeth = OPENSSL_malloc(sizeof(EVP_PKEY_METHOD));
203 if (!pmeth)
204 return NULL;
205
206 pmeth->pkey_id = id;
207 pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC;
208
209 pmeth->init = 0;
210 pmeth->copy = 0;
211 pmeth->cleanup = 0;
212 pmeth->paramgen_init = 0;
213 pmeth->paramgen = 0;
214 pmeth->keygen_init = 0;
215 pmeth->keygen = 0;
216 pmeth->sign_init = 0;
217 pmeth->sign = 0;
218 pmeth->verify_init = 0;
219 pmeth->verify = 0;
220 pmeth->verify_recover_init = 0;
221 pmeth->verify_recover = 0;
222 pmeth->signctx_init = 0;
223 pmeth->signctx = 0;
224 pmeth->verifyctx_init = 0;
225 pmeth->verifyctx = 0;
226 pmeth->encrypt_init = 0;
227 pmeth->encrypt = 0;
228 pmeth->decrypt_init = 0;
229 pmeth->decrypt = 0;
230 pmeth->derive_init = 0;
231 pmeth->derive = 0;
232 pmeth->ctrl = 0;
233 pmeth->ctrl_str = 0;
234
235 return pmeth;
236 }
237
238void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth)
239 {
240 if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC))
241 OPENSSL_free(pmeth);
242 }
243
244EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e)
245 {
246 return int_ctx_new(pkey, e, -1);
247 }
248
249EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e)
250 {
251 return int_ctx_new(NULL, e, id);
252 }
253
254EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx)
255 {
256 EVP_PKEY_CTX *rctx;
257 if (!pctx->pmeth || !pctx->pmeth->copy)
258 return NULL;
259#ifndef OPENSSL_NO_ENGINE
260 /* Make sure it's safe to copy a pkey context using an ENGINE */
261 if (pctx->engine && !ENGINE_init(pctx->engine))
262 {
263 EVPerr(EVP_F_EVP_PKEY_CTX_DUP,ERR_R_ENGINE_LIB);
264 return 0;
265 }
266#endif
267 rctx = OPENSSL_malloc(sizeof(EVP_PKEY_CTX));
268 if (!rctx)
269 return NULL;
270
271 rctx->pmeth = pctx->pmeth;
272#ifndef OPENSSL_NO_ENGINE
273 rctx->engine = pctx->engine;
274#endif
275
276 if (pctx->pkey)
277 CRYPTO_add(&pctx->pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
278
279 rctx->pkey = pctx->pkey;
280
281 if (pctx->peerkey)
282 CRYPTO_add(&pctx->peerkey->references,1,CRYPTO_LOCK_EVP_PKEY);
283
284 rctx->peerkey = pctx->peerkey;
285
286 rctx->data = NULL;
287 rctx->app_data = NULL;
288 rctx->operation = pctx->operation;
289
290 if (pctx->pmeth->copy(rctx, pctx) > 0)
291 return rctx;
292
293 EVP_PKEY_CTX_free(rctx);
294 return NULL;
295
296 }
297
298int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth)
299 {
300 if (app_pkey_methods == NULL)
301 {
302 app_pkey_methods = sk_EVP_PKEY_METHOD_new(pmeth_cmp);
303 if (!app_pkey_methods)
304 return 0;
305 }
306 if (!sk_EVP_PKEY_METHOD_push(app_pkey_methods, pmeth))
307 return 0;
308 sk_EVP_PKEY_METHOD_sort(app_pkey_methods);
309 return 1;
310 }
311
312void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx)
313 {
314 if (ctx == NULL)
315 return;
316 if (ctx->pmeth && ctx->pmeth->cleanup)
317 ctx->pmeth->cleanup(ctx);
318 if (ctx->pkey)
319 EVP_PKEY_free(ctx->pkey);
320 if (ctx->peerkey)
321 EVP_PKEY_free(ctx->peerkey);
322#ifndef OPENSSL_NO_ENGINE
323 if(ctx->engine)
324 /* The EVP_PKEY_CTX we used belongs to an ENGINE, release the
325 * functional reference we held for this reason. */
326 ENGINE_finish(ctx->engine);
327#endif
328 OPENSSL_free(ctx);
329 }
330
331int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype,
332 int cmd, int p1, void *p2)
333 {
334 int ret;
335 if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl)
336 {
337 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
338 return -2;
339 }
340 if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype))
341 return -1;
342
343 if (ctx->operation == EVP_PKEY_OP_UNDEFINED)
344 {
345 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET);
346 return -1;
347 }
348
349 if ((optype != -1) && !(ctx->operation & optype))
350 {
351 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION);
352 return -1;
353 }
354
355 ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2);
356
357 if (ret == -2)
358 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED);
359
360 return ret;
361
362 }
363
364int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx,
365 const char *name, const char *value)
366 {
367 if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str)
368 {
369 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR,
370 EVP_R_COMMAND_NOT_SUPPORTED);
371 return -2;
372 }
373 if (!strcmp(name, "digest"))
374 {
375 const EVP_MD *md;
376 if (!value || !(md = EVP_get_digestbyname(value)))
377 {
378 EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR,
379 EVP_R_INVALID_DIGEST);
380 return 0;
381 }
382 return EVP_PKEY_CTX_set_signature_md(ctx, md);
383 }
384 return ctx->pmeth->ctrl_str(ctx, name, value);
385 }
386
387int EVP_PKEY_CTX_get_operation(EVP_PKEY_CTX *ctx)
388 {
389 return ctx->operation;
390 }
391
392void EVP_PKEY_CTX_set0_keygen_info(EVP_PKEY_CTX *ctx, int *dat, int datlen)
393 {
394 ctx->keygen_info = dat;
395 ctx->keygen_info_count = datlen;
396 }
397
398void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data)
399 {
400 ctx->data = data;
401 }
402
403void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx)
404 {
405 return ctx->data;
406 }
407
408EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx)
409 {
410 return ctx->pkey;
411 }
412
413EVP_PKEY *EVP_PKEY_CTX_get0_peerkey(EVP_PKEY_CTX *ctx)
414 {
415 return ctx->peerkey;
416 }
417
418void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data)
419 {
420 ctx->app_data = data;
421 }
422
423void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx)
424 {
425 return ctx->app_data;
426 }
427
428void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
429 int (*init)(EVP_PKEY_CTX *ctx))
430 {
431 pmeth->init = init;
432 }
433
434void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
435 int (*copy)(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src))
436 {
437 pmeth->copy = copy;
438 }
439
440void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
441 void (*cleanup)(EVP_PKEY_CTX *ctx))
442 {
443 pmeth->cleanup = cleanup;
444 }
445
446void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
447 int (*paramgen_init)(EVP_PKEY_CTX *ctx),
448 int (*paramgen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
449 {
450 pmeth->paramgen_init = paramgen_init;
451 pmeth->paramgen = paramgen;
452 }
453
454void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
455 int (*keygen_init)(EVP_PKEY_CTX *ctx),
456 int (*keygen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey))
457 {
458 pmeth->keygen_init = keygen_init;
459 pmeth->keygen = keygen;
460 }
461
462void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
463 int (*sign_init)(EVP_PKEY_CTX *ctx),
464 int (*sign)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
465 const unsigned char *tbs, size_t tbslen))
466 {
467 pmeth->sign_init = sign_init;
468 pmeth->sign = sign;
469 }
470
471void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
472 int (*verify_init)(EVP_PKEY_CTX *ctx),
473 int (*verify)(EVP_PKEY_CTX *ctx, const unsigned char *sig, size_t siglen,
474 const unsigned char *tbs, size_t tbslen))
475 {
476 pmeth->verify_init = verify_init;
477 pmeth->verify = verify;
478 }
479
480void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
481 int (*verify_recover_init)(EVP_PKEY_CTX *ctx),
482 int (*verify_recover)(EVP_PKEY_CTX *ctx,
483 unsigned char *sig, size_t *siglen,
484 const unsigned char *tbs, size_t tbslen))
485 {
486 pmeth->verify_recover_init = verify_recover_init;
487 pmeth->verify_recover = verify_recover;
488 }
489
490void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
491 int (*signctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx),
492 int (*signctx)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
493 EVP_MD_CTX *mctx))
494 {
495 pmeth->signctx_init = signctx_init;
496 pmeth->signctx = signctx;
497 }
498
499void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
500 int (*verifyctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx),
501 int (*verifyctx)(EVP_PKEY_CTX *ctx, const unsigned char *sig,int siglen,
502 EVP_MD_CTX *mctx))
503 {
504 pmeth->verifyctx_init = verifyctx_init;
505 pmeth->verifyctx = verifyctx;
506 }
507
508void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
509 int (*encrypt_init)(EVP_PKEY_CTX *ctx),
510 int (*encryptfn)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
511 const unsigned char *in, size_t inlen))
512 {
513 pmeth->encrypt_init = encrypt_init;
514 pmeth->encrypt = encryptfn;
515 }
516
517void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
518 int (*decrypt_init)(EVP_PKEY_CTX *ctx),
519 int (*decrypt)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
520 const unsigned char *in, size_t inlen))
521 {
522 pmeth->decrypt_init = decrypt_init;
523 pmeth->decrypt = decrypt;
524 }
525
526void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
527 int (*derive_init)(EVP_PKEY_CTX *ctx),
528 int (*derive)(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen))
529 {
530 pmeth->derive_init = derive_init;
531 pmeth->derive = derive;
532 }
533
534void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
535 int (*ctrl)(EVP_PKEY_CTX *ctx, int type, int p1, void *p2),
536 int (*ctrl_str)(EVP_PKEY_CTX *ctx, const char *type, const char *value))
537 {
538 pmeth->ctrl = ctrl;
539 pmeth->ctrl_str = ctrl_str;
540 }
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