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0b6f3c66 DSH |
1 | /* pmeth_lib.c */ |
2 | /* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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> | |
0b6f3c66 | 61 | #include "cryptlib.h" |
c20276e4 | 62 | #include <openssl/objects.h> |
5da98aa6 | 63 | #include <openssl/evp.h> |
cd763898 | 64 | #include "asn1_locl.h" |
0b6f3c66 DSH |
65 | #include "evp_locl.h" |
66 | ||
ba30bad5 | 67 | typedef int sk_cmp_fn_type(const char * const *a, const char * const *b); |
0b6f3c66 DSH |
68 | STACK *app_pkey_methods = NULL; |
69 | ||
9ca7047d | 70 | extern EVP_PKEY_METHOD rsa_pkey_meth, dh_pkey_meth, dsa_pkey_meth, ec_pkey_meth; |
0b6f3c66 | 71 | |
9e4d0f0b | 72 | static const EVP_PKEY_METHOD *standard_methods[] = |
0b6f3c66 | 73 | { |
c927df3f | 74 | &rsa_pkey_meth, |
3ba0885a | 75 | &dh_pkey_meth, |
9ca7047d DSH |
76 | &dsa_pkey_meth, |
77 | &ec_pkey_meth | |
0b6f3c66 DSH |
78 | }; |
79 | ||
80 | static int pmeth_cmp(const EVP_PKEY_METHOD * const *a, | |
81 | const EVP_PKEY_METHOD * const *b) | |
82 | { | |
83 | return ((*a)->pkey_id - (*b)->pkey_id); | |
84 | } | |
85 | ||
86 | const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type, ENGINE *e) | |
87 | { | |
88 | EVP_PKEY_METHOD tmp, *t = &tmp, **ret; | |
89 | tmp.pkey_id = type; | |
90 | if (app_pkey_methods) | |
91 | { | |
92 | int idx; | |
93 | idx = sk_find(app_pkey_methods, (char *)&tmp); | |
94 | if (idx >= 0) | |
95 | return (EVP_PKEY_METHOD *) | |
96 | sk_value(app_pkey_methods, idx); | |
97 | } | |
98 | ret = (EVP_PKEY_METHOD **) OBJ_bsearch((char *)&t, | |
99 | (char *)standard_methods, | |
100 | sizeof(standard_methods)/sizeof(EVP_PKEY_METHOD *), | |
101 | sizeof(EVP_PKEY_METHOD *), | |
102 | (int (*)(const void *, const void *))pmeth_cmp); | |
103 | if (!ret || !*ret) | |
104 | return NULL; | |
105 | return *ret; | |
106 | } | |
107 | ||
f5cda4cb | 108 | static EVP_PKEY_CTX *int_ctx_new(EVP_PKEY *pkey, ENGINE *e, int id) |
0b6f3c66 DSH |
109 | { |
110 | EVP_PKEY_CTX *ret; | |
111 | const EVP_PKEY_METHOD *pmeth; | |
f5cda4cb DSH |
112 | if (id == -1) |
113 | { | |
114 | if (!pkey || !pkey->ameth) | |
115 | return NULL; | |
116 | id = pkey->ameth->pkey_id; | |
117 | } | |
118 | pmeth = EVP_PKEY_meth_find(id, e); | |
0b6f3c66 DSH |
119 | if (pmeth == NULL) |
120 | return NULL; | |
121 | ret = OPENSSL_malloc(sizeof(EVP_PKEY_CTX)); | |
122 | ret->pmeth = pmeth; | |
123 | ret->operation = EVP_PKEY_OP_UNDEFINED; | |
cd763898 | 124 | ret->pkey = pkey; |
d87e6152 | 125 | ret->peerkey = NULL; |
f5cda4cb DSH |
126 | if (pkey) |
127 | CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY); | |
0b6f3c66 DSH |
128 | ret->data = NULL; |
129 | ||
5da98aa6 DSH |
130 | if (pmeth->init) |
131 | { | |
132 | if (pmeth->init(ret) <= 0) | |
133 | { | |
134 | EVP_PKEY_CTX_free(ret); | |
135 | return NULL; | |
136 | } | |
137 | } | |
138 | ||
0b6f3c66 DSH |
139 | return ret; |
140 | } | |
141 | ||
ba30bad5 DSH |
142 | EVP_PKEY_METHOD* EVP_PKEY_meth_new(int id, int flags) |
143 | { | |
144 | EVP_PKEY_METHOD *pmeth; | |
145 | pmeth = OPENSSL_malloc(sizeof(EVP_PKEY_METHOD)); | |
146 | if (!pmeth) | |
147 | return NULL; | |
148 | ||
149 | pmeth->pkey_id = id; | |
b010b7c4 | 150 | pmeth->flags = flags | EVP_PKEY_FLAG_DYNAMIC; |
ba30bad5 DSH |
151 | |
152 | pmeth->init = 0; | |
8bdcef40 | 153 | pmeth->copy = 0; |
ba30bad5 DSH |
154 | pmeth->cleanup = 0; |
155 | pmeth->paramgen_init = 0; | |
156 | pmeth->paramgen = 0; | |
157 | pmeth->keygen_init = 0; | |
158 | pmeth->keygen = 0; | |
159 | pmeth->sign_init = 0; | |
160 | pmeth->sign = 0; | |
161 | pmeth->verify_init = 0; | |
162 | pmeth->verify = 0; | |
163 | pmeth->verify_recover_init = 0; | |
164 | pmeth->verify_recover = 0; | |
165 | pmeth->signctx_init = 0; | |
166 | pmeth->signctx = 0; | |
167 | pmeth->verifyctx_init = 0; | |
168 | pmeth->verifyctx = 0; | |
169 | pmeth->encrypt_init = 0; | |
170 | pmeth->encrypt = 0; | |
171 | pmeth->decrypt_init = 0; | |
172 | pmeth->decrypt = 0; | |
173 | pmeth->derive_init = 0; | |
174 | pmeth->derive = 0; | |
175 | pmeth->ctrl = 0; | |
176 | pmeth->ctrl_str = 0; | |
177 | ||
178 | return pmeth; | |
179 | } | |
180 | ||
181 | void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth) | |
182 | { | |
b010b7c4 | 183 | if (pmeth && (pmeth->flags & EVP_PKEY_FLAG_DYNAMIC)) |
ba30bad5 DSH |
184 | OPENSSL_free(pmeth); |
185 | } | |
186 | ||
f5cda4cb DSH |
187 | EVP_PKEY_CTX *EVP_PKEY_CTX_new(EVP_PKEY *pkey, ENGINE *e) |
188 | { | |
189 | return int_ctx_new(pkey, e, -1); | |
190 | } | |
191 | ||
192 | EVP_PKEY_CTX *EVP_PKEY_CTX_new_id(int id, ENGINE *e) | |
193 | { | |
194 | return int_ctx_new(NULL, e, id); | |
195 | } | |
196 | ||
8bdcef40 DSH |
197 | EVP_PKEY_CTX *EVP_PKEY_CTX_dup(EVP_PKEY_CTX *pctx) |
198 | { | |
199 | EVP_PKEY_CTX *rctx; | |
200 | if (!pctx->pmeth || !pctx->pmeth->copy) | |
201 | return NULL; | |
202 | rctx = OPENSSL_malloc(sizeof(EVP_PKEY_CTX)); | |
203 | if (!rctx) | |
204 | return NULL; | |
205 | ||
206 | rctx->pmeth = pctx->pmeth; | |
207 | ||
208 | if (pctx->pkey) | |
209 | { | |
210 | CRYPTO_add(&pctx->pkey->references,1,CRYPTO_LOCK_EVP_PKEY); | |
211 | rctx->pkey = pctx->pkey; | |
212 | } | |
213 | ||
214 | if (pctx->peerkey) | |
215 | { | |
216 | CRYPTO_add(&pctx->peerkey->references,1,CRYPTO_LOCK_EVP_PKEY); | |
217 | rctx->peerkey = pctx->peerkey; | |
218 | } | |
219 | ||
220 | rctx->data = NULL; | |
221 | rctx->app_data = NULL; | |
222 | rctx->operation = pctx->operation; | |
223 | ||
224 | if (pctx->pmeth->copy(rctx, pctx) > 0) | |
225 | return pctx; | |
226 | ||
227 | EVP_PKEY_CTX_free(rctx); | |
228 | return NULL; | |
229 | ||
230 | } | |
231 | ||
ba30bad5 DSH |
232 | int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth) |
233 | { | |
234 | if (app_pkey_methods == NULL) | |
235 | { | |
236 | app_pkey_methods = sk_new((sk_cmp_fn_type *)pmeth_cmp); | |
237 | if (!app_pkey_methods) | |
238 | return 0; | |
239 | } | |
240 | if (!sk_push(app_pkey_methods, (char *)pmeth)) | |
241 | return 0; | |
242 | sk_sort(app_pkey_methods); | |
243 | return 1; | |
244 | } | |
245 | ||
5da98aa6 DSH |
246 | void EVP_PKEY_CTX_free(EVP_PKEY_CTX *ctx) |
247 | { | |
248 | if (ctx->pmeth && ctx->pmeth->cleanup) | |
249 | ctx->pmeth->cleanup(ctx); | |
250 | if (ctx->pkey) | |
251 | EVP_PKEY_free(ctx->pkey); | |
ffb1ac67 DSH |
252 | if (ctx->peerkey) |
253 | EVP_PKEY_free(ctx->peerkey); | |
5da98aa6 DSH |
254 | OPENSSL_free(ctx); |
255 | } | |
256 | ||
0b6f3c66 DSH |
257 | int EVP_PKEY_CTX_ctrl(EVP_PKEY_CTX *ctx, int keytype, int optype, |
258 | int cmd, int p1, void *p2) | |
259 | { | |
5da98aa6 | 260 | int ret; |
0b6f3c66 | 261 | if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl) |
5da98aa6 DSH |
262 | { |
263 | EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED); | |
0b6f3c66 | 264 | return -2; |
5da98aa6 | 265 | } |
0b6f3c66 DSH |
266 | if ((keytype != -1) && (ctx->pmeth->pkey_id != keytype)) |
267 | return -1; | |
268 | ||
269 | if (ctx->operation == EVP_PKEY_OP_UNDEFINED) | |
270 | { | |
5da98aa6 | 271 | EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_NO_OPERATION_SET); |
0b6f3c66 DSH |
272 | return -1; |
273 | } | |
274 | ||
716630c0 | 275 | if ((optype != -1) && !(ctx->operation & optype)) |
0b6f3c66 | 276 | { |
5da98aa6 | 277 | EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_INVALID_OPERATION); |
0b6f3c66 DSH |
278 | return -1; |
279 | } | |
280 | ||
5da98aa6 | 281 | ret = ctx->pmeth->ctrl(ctx, cmd, p1, p2); |
0b6f3c66 | 282 | |
5da98aa6 DSH |
283 | if (ret == -2) |
284 | EVPerr(EVP_F_EVP_PKEY_CTX_CTRL, EVP_R_COMMAND_NOT_SUPPORTED); | |
0b6f3c66 | 285 | |
5da98aa6 | 286 | return ret; |
0b6f3c66 | 287 | |
5da98aa6 | 288 | } |
0b6f3c66 | 289 | |
4a3dc3c0 DSH |
290 | int EVP_PKEY_CTX_ctrl_str(EVP_PKEY_CTX *ctx, |
291 | const char *name, const char *value) | |
f733a5ef | 292 | { |
c927df3f | 293 | if (!ctx || !ctx->pmeth || !ctx->pmeth->ctrl_str) |
f733a5ef | 294 | { |
c927df3f DSH |
295 | EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, |
296 | EVP_R_COMMAND_NOT_SUPPORTED); | |
f733a5ef DSH |
297 | return -2; |
298 | } | |
b2a97be7 DSH |
299 | if (!strcmp(name, "digest")) |
300 | { | |
301 | const EVP_MD *md; | |
302 | if (!value || !(md = EVP_get_digestbyname(value))) | |
303 | { | |
c927df3f DSH |
304 | EVPerr(EVP_F_EVP_PKEY_CTX_CTRL_STR, |
305 | EVP_R_INVALID_DIGEST); | |
b2a97be7 DSH |
306 | return 0; |
307 | } | |
716630c0 | 308 | return EVP_PKEY_CTX_set_signature_md(ctx, md); |
b2a97be7 | 309 | } |
f733a5ef DSH |
310 | return ctx->pmeth->ctrl_str(ctx, name, value); |
311 | } | |
f5cda4cb DSH |
312 | |
313 | void EVP_PKEY_CTX_set_data(EVP_PKEY_CTX *ctx, void *data) | |
314 | { | |
315 | ctx->data = data; | |
316 | } | |
317 | ||
318 | void *EVP_PKEY_CTX_get_data(EVP_PKEY_CTX *ctx) | |
319 | { | |
320 | return ctx->data; | |
321 | } | |
322 | ||
81cebb8b DSH |
323 | EVP_PKEY *EVP_PKEY_CTX_get0_pkey(EVP_PKEY_CTX *ctx) |
324 | { | |
325 | return ctx->pkey; | |
326 | } | |
327 | ||
f5cda4cb DSH |
328 | void EVP_PKEY_CTX_set_app_data(EVP_PKEY_CTX *ctx, void *data) |
329 | { | |
330 | ctx->app_data = data; | |
331 | } | |
332 | ||
333 | void *EVP_PKEY_CTX_get_app_data(EVP_PKEY_CTX *ctx) | |
334 | { | |
335 | return ctx->app_data; | |
336 | } | |
ba30bad5 DSH |
337 | |
338 | void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth, | |
339 | int (*init)(EVP_PKEY_CTX *ctx)) | |
340 | { | |
341 | pmeth->init = init; | |
8bdcef40 DSH |
342 | } |
343 | ||
344 | void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth, | |
345 | int (*copy)(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)) | |
346 | { | |
347 | pmeth->copy = copy; | |
ba30bad5 DSH |
348 | } |
349 | ||
350 | void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth, | |
351 | void (*cleanup)(EVP_PKEY_CTX *ctx)) | |
352 | { | |
353 | pmeth->cleanup = cleanup; | |
354 | } | |
355 | ||
356 | void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth, | |
357 | int (*paramgen_init)(EVP_PKEY_CTX *ctx), | |
358 | int (*paramgen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)) | |
359 | { | |
360 | pmeth->paramgen_init = paramgen_init; | |
361 | pmeth->paramgen = paramgen; | |
362 | } | |
363 | ||
364 | void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth, | |
365 | int (*keygen_init)(EVP_PKEY_CTX *ctx), | |
366 | int (*keygen)(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)) | |
367 | { | |
368 | pmeth->keygen_init = keygen_init; | |
369 | pmeth->keygen = keygen; | |
370 | } | |
371 | ||
372 | void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth, | |
373 | int (*sign_init)(EVP_PKEY_CTX *ctx), | |
eaff5a14 DSH |
374 | int (*sign)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen, |
375 | const unsigned char *tbs, size_t tbslen)) | |
ba30bad5 DSH |
376 | { |
377 | pmeth->sign_init = sign_init; | |
378 | pmeth->sign = sign; | |
379 | } | |
380 | ||
381 | void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth, | |
382 | int (*verify_init)(EVP_PKEY_CTX *ctx), | |
eaff5a14 DSH |
383 | int (*verify)(EVP_PKEY_CTX *ctx, const unsigned char *sig, size_t siglen, |
384 | const unsigned char *tbs, size_t tbslen)) | |
ba30bad5 DSH |
385 | { |
386 | pmeth->verify_init = verify_init; | |
387 | pmeth->verify = verify; | |
388 | } | |
389 | ||
390 | void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth, | |
391 | int (*verify_recover_init)(EVP_PKEY_CTX *ctx), | |
392 | int (*verify_recover)(EVP_PKEY_CTX *ctx, | |
eaff5a14 DSH |
393 | unsigned char *sig, size_t *siglen, |
394 | const unsigned char *tbs, size_t tbslen)) | |
ba30bad5 DSH |
395 | { |
396 | pmeth->verify_recover_init = verify_recover_init; | |
397 | pmeth->verify_recover = verify_recover; | |
398 | } | |
399 | ||
400 | void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth, | |
401 | int (*signctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx), | |
eaff5a14 | 402 | int (*signctx)(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen, |
ba30bad5 DSH |
403 | EVP_MD_CTX *mctx)) |
404 | { | |
405 | pmeth->signctx_init = signctx_init; | |
406 | pmeth->signctx = signctx; | |
407 | } | |
408 | ||
409 | void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth, | |
410 | int (*verifyctx_init)(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx), | |
411 | int (*verifyctx)(EVP_PKEY_CTX *ctx, const unsigned char *sig,int siglen, | |
412 | EVP_MD_CTX *mctx)) | |
413 | { | |
414 | pmeth->verifyctx_init = verifyctx_init; | |
415 | pmeth->verifyctx = verifyctx; | |
416 | } | |
417 | ||
418 | void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth, | |
419 | int (*encrypt_init)(EVP_PKEY_CTX *ctx), | |
eaff5a14 DSH |
420 | int (*encrypt)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, |
421 | const unsigned char *in, size_t inlen)) | |
ba30bad5 DSH |
422 | { |
423 | pmeth->encrypt_init = encrypt_init; | |
424 | pmeth->encrypt = encrypt; | |
425 | } | |
426 | ||
427 | void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth, | |
428 | int (*decrypt_init)(EVP_PKEY_CTX *ctx), | |
eaff5a14 DSH |
429 | int (*decrypt)(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen, |
430 | const unsigned char *in, size_t inlen)) | |
ba30bad5 DSH |
431 | { |
432 | pmeth->decrypt_init = decrypt_init; | |
433 | pmeth->decrypt = decrypt; | |
434 | } | |
435 | ||
436 | void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth, | |
437 | int (*derive_init)(EVP_PKEY_CTX *ctx), | |
eaff5a14 | 438 | int (*derive)(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen)) |
ba30bad5 DSH |
439 | { |
440 | pmeth->derive_init = derive_init; | |
441 | pmeth->derive = derive; | |
442 | } | |
443 | ||
444 | void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth, | |
445 | int (*ctrl)(EVP_PKEY_CTX *ctx, int type, int p1, void *p2), | |
446 | int (*ctrl_str)(EVP_PKEY_CTX *ctx, const char *type, const char *value)) | |
447 | { | |
448 | pmeth->ctrl = ctrl; | |
449 | pmeth->ctrl_str = ctrl_str; | |
450 | } |