1 /* pmeth_fn.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 #include "evp_locl.h"
65
66 #define M_check_autoarg(ctx, arg, arglen, err) \
67 if (ctx->pmeth->flags & EVP_PKEY_FLAG_AUTOARGLEN) \
68 { \
69 size_t pksize = (size_t)EVP_PKEY_size(ctx->pkey); \
70 if (!arg) \
71 { \
72 *arglen = pksize; \
73 return 1; \
74 } \
75 else if (*arglen < pksize) \
76 { \
77 EVPerr(err, EVP_R_BUFFER_TOO_SMALL); /*ckerr_ignore*/\
78 return 0; \
79 } \
80 }
81
82 int EVP_PKEY_sign_init(EVP_PKEY_CTX *ctx)
83 {
84 int ret;
85 if (!ctx || !ctx->pmeth || !ctx->pmeth->sign)
86 {
87 EVPerr(EVP_F_EVP_PKEY_SIGN_INIT,
88 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
89 return -2;
90 }
91 ctx->operation = EVP_PKEY_OP_SIGN;
92 if (!ctx->pmeth->sign_init)
93 return 1;
94 ret = ctx->pmeth->sign_init(ctx);
95 if (ret <= 0)
96 ctx->operation = EVP_PKEY_OP_UNDEFINED;
97 return ret;
98 }
99
100 int EVP_PKEY_sign(EVP_PKEY_CTX *ctx,
101 unsigned char *sig, size_t *siglen,
102 const unsigned char *tbs, size_t tbslen)
103 {
104 if (!ctx || !ctx->pmeth || !ctx->pmeth->sign)
105 {
106 EVPerr(EVP_F_EVP_PKEY_SIGN,
107 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
108 return -2;
109 }
110 if (ctx->operation != EVP_PKEY_OP_SIGN)
111 {
112 EVPerr(EVP_F_EVP_PKEY_SIGN, EVP_R_OPERATON_NOT_INITIALIZED);
113 return -1;
114 }
115 M_check_autoarg(ctx, sig, siglen, EVP_F_EVP_PKEY_SIGN)
116 return ctx->pmeth->sign(ctx, sig, siglen, tbs, tbslen);
117 }
118
119 int EVP_PKEY_verify_init(EVP_PKEY_CTX *ctx)
120 {
121 int ret;
122 if (!ctx || !ctx->pmeth || !ctx->pmeth->verify)
123 {
124 EVPerr(EVP_F_EVP_PKEY_VERIFY_INIT,
125 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
126 return -2;
127 }
128 ctx->operation = EVP_PKEY_OP_VERIFY;
129 if (!ctx->pmeth->verify_init)
130 return 1;
131 ret = ctx->pmeth->verify_init(ctx);
132 if (ret <= 0)
133 ctx->operation = EVP_PKEY_OP_UNDEFINED;
134 return ret;
135 }
136
137 int EVP_PKEY_verify(EVP_PKEY_CTX *ctx,
138 const unsigned char *sig, size_t siglen,
139 const unsigned char *tbs, size_t tbslen)
140 {
141 if (!ctx || !ctx->pmeth || !ctx->pmeth->verify)
142 {
143 EVPerr(EVP_F_EVP_PKEY_VERIFY,
144 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
145 return -2;
146 }
147 if (ctx->operation != EVP_PKEY_OP_VERIFY)
148 {
149 EVPerr(EVP_F_EVP_PKEY_VERIFY, EVP_R_OPERATON_NOT_INITIALIZED);
150 return -1;
151 }
152 return ctx->pmeth->verify(ctx, sig, siglen, tbs, tbslen);
153 }
154
155 int EVP_PKEY_verify_recover_init(EVP_PKEY_CTX *ctx)
156 {
157 int ret;
158 if (!ctx || !ctx->pmeth || !ctx->pmeth->verify_recover)
159 {
160 EVPerr(EVP_F_EVP_PKEY_VERIFY_RECOVER_INIT,
161 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
162 return -2;
163 }
164 ctx->operation = EVP_PKEY_OP_VERIFYRECOVER;
165 if (!ctx->pmeth->verify_recover_init)
166 return 1;
167 ret = ctx->pmeth->verify_recover_init(ctx);
168 if (ret <= 0)
169 ctx->operation = EVP_PKEY_OP_UNDEFINED;
170 return ret;
171 }
172
173 int EVP_PKEY_verify_recover(EVP_PKEY_CTX *ctx,
174 unsigned char *rout, size_t *routlen,
175 const unsigned char *sig, size_t siglen)
176 {
177 if (!ctx || !ctx->pmeth || !ctx->pmeth->verify_recover)
178 {
179 EVPerr(EVP_F_EVP_PKEY_VERIFY_RECOVER,
180 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
181 return -2;
182 }
183 if (ctx->operation != EVP_PKEY_OP_VERIFYRECOVER)
184 {
185 EVPerr(EVP_F_EVP_PKEY_VERIFY_RECOVER, EVP_R_OPERATON_NOT_INITIALIZED);
186 return -1;
187 }
188 M_check_autoarg(ctx, rout, routlen, EVP_F_EVP_PKEY_VERIFY_RECOVER)
189 return ctx->pmeth->verify_recover(ctx, rout, routlen, sig, siglen);
190 }
191
192 int EVP_PKEY_encrypt_init(EVP_PKEY_CTX *ctx)
193 {
194 int ret;
195 if (!ctx || !ctx->pmeth || !ctx->pmeth->encrypt)
196 {
197 EVPerr(EVP_F_EVP_PKEY_ENCRYPT_INIT,
198 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
199 return -2;
200 }
201 ctx->operation = EVP_PKEY_OP_ENCRYPT;
202 if (!ctx->pmeth->encrypt_init)
203 return 1;
204 ret = ctx->pmeth->encrypt_init(ctx);
205 if (ret <= 0)
206 ctx->operation = EVP_PKEY_OP_UNDEFINED;
207 return ret;
208 }
209
210 int EVP_PKEY_encrypt(EVP_PKEY_CTX *ctx,
211 unsigned char *out, size_t *outlen,
212 const unsigned char *in, size_t inlen)
213 {
214 if (!ctx || !ctx->pmeth || !ctx->pmeth->encrypt)
215 {
216 EVPerr(EVP_F_EVP_PKEY_ENCRYPT,
217 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
218 return -2;
219 }
220 if (ctx->operation != EVP_PKEY_OP_ENCRYPT)
221 {
222 EVPerr(EVP_F_EVP_PKEY_ENCRYPT, EVP_R_OPERATON_NOT_INITIALIZED);
223 return -1;
224 }
225 M_check_autoarg(ctx, out, outlen, EVP_F_EVP_PKEY_ENCRYPT)
226 return ctx->pmeth->encrypt(ctx, out, outlen, in, inlen);
227 }
228
229 int EVP_PKEY_decrypt_init(EVP_PKEY_CTX *ctx)
230 {
231 int ret;
232 if (!ctx || !ctx->pmeth || !ctx->pmeth->decrypt)
233 {
234 EVPerr(EVP_F_EVP_PKEY_DECRYPT_INIT,
235 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
236 return -2;
237 }
238 ctx->operation = EVP_PKEY_OP_DECRYPT;
239 if (!ctx->pmeth->decrypt_init)
240 return 1;
241 ret = ctx->pmeth->decrypt_init(ctx);
242 if (ret <= 0)
243 ctx->operation = EVP_PKEY_OP_UNDEFINED;
244 return ret;
245 }
246
247 int EVP_PKEY_decrypt(EVP_PKEY_CTX *ctx,
248 unsigned char *out, size_t *outlen,
249 const unsigned char *in, size_t inlen)
250 {
251 if (!ctx || !ctx->pmeth || !ctx->pmeth->decrypt)
252 {
253 EVPerr(EVP_F_EVP_PKEY_DECRYPT,
254 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
255 return -2;
256 }
257 if (ctx->operation != EVP_PKEY_OP_DECRYPT)
258 {
259 EVPerr(EVP_F_EVP_PKEY_DECRYPT, EVP_R_OPERATON_NOT_INITIALIZED);
260 return -1;
261 }
262 M_check_autoarg(ctx, out, outlen, EVP_F_EVP_PKEY_DECRYPT)
263 return ctx->pmeth->decrypt(ctx, out, outlen, in, inlen);
264 }
265
266
267 int EVP_PKEY_derive_init(EVP_PKEY_CTX *ctx)
268 {
269 int ret;
270 if (!ctx || !ctx->pmeth || !ctx->pmeth->derive)
271 {
272 EVPerr(EVP_F_EVP_PKEY_DERIVE_INIT,
273 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
274 return -2;
275 }
276 ctx->operation = EVP_PKEY_OP_DERIVE;
277 if (!ctx->pmeth->derive_init)
278 return 1;
279 ret = ctx->pmeth->derive_init(ctx);
280 if (ret <= 0)
281 ctx->operation = EVP_PKEY_OP_UNDEFINED;
282 return ret;
283 }
284
285 int EVP_PKEY_derive_set_peer(EVP_PKEY_CTX *ctx, EVP_PKEY *peer)
286 {
287 int ret;
288 if (!ctx || !ctx->pmeth || !(ctx->pmeth->derive||ctx->pmeth->encrypt||ctx->pmeth->decrypt) || !ctx->pmeth->ctrl)
289 {
290 EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER,
291 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
292 return -2;
293 }
294 if (ctx->operation != EVP_PKEY_OP_DERIVE && ctx->operation != EVP_PKEY_OP_ENCRYPT && ctx->operation != EVP_PKEY_OP_DECRYPT)
295 {
296 EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER,
297 EVP_R_OPERATON_NOT_INITIALIZED);
298 return -1;
299 }
300
301 ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 0, peer);
302
303 if (ret <= 0)
304 return ret;
305
306 if (ret == 2)
307 return 1;
308
309 if (!ctx->pkey)
310 {
311 EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER, EVP_R_NO_KEY_SET);
312 return -1;
313 }
314
315 if (ctx->pkey->type != peer->type)
316 {
317 EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER,
318 EVP_R_DIFFERENT_KEY_TYPES);
319 return -1;
320 }
321
322 /* ran@cryptocom.ru: For clarity. The error is if parameters in peer are
323 * present (!missing) but don't match. EVP_PKEY_cmp_parameters may return
324 * 1 (match), 0 (don't match) and -2 (comparison is not defined). -1
325 * (different key types) is impossible here because it is checked earlier.
326 * -2 is OK for us here, as well as 1, so we can check for 0 only. */
327 if (!EVP_PKEY_missing_parameters(peer) &&
328 !EVP_PKEY_cmp_parameters(ctx->pkey, peer))
329 {
330 EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER,
331 EVP_R_DIFFERENT_PARAMETERS);
332 return -1;
333 }
334
335 if (ctx->peerkey)
336 EVP_PKEY_free(ctx->peerkey);
337 ctx->peerkey = peer;
338
339 ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 1, peer);
340
341 if (ret <= 0)
342 {
343 ctx->peerkey = NULL;
344 return ret;
345 }
346
347 CRYPTO_add(&peer->references,1,CRYPTO_LOCK_EVP_PKEY);
348 return 1;
349 }
350
351
352 int EVP_PKEY_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *pkeylen)
353 {
354 if (!ctx || !ctx->pmeth || !ctx->pmeth->derive)
355 {
356 EVPerr(EVP_F_EVP_PKEY_DERIVE,
357 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
358 return -2;
359 }
360 if (ctx->operation != EVP_PKEY_OP_DERIVE)
361 {
362 EVPerr(EVP_F_EVP_PKEY_DERIVE, EVP_R_OPERATON_NOT_INITIALIZED);
363 return -1;
364 }
365 M_check_autoarg(ctx, key, pkeylen, EVP_F_EVP_PKEY_DERIVE)
366 return ctx->pmeth->derive(ctx, key, pkeylen);
367 }