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