Line data Source code
1 : /* pmeth_fn.c */
2 : /*
3 : * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 : * 2006.
5 : */
6 : /* ====================================================================
7 : * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
8 : *
9 : * Redistribution and use in source and binary forms, with or without
10 : * modification, are permitted provided that the following conditions
11 : * are met:
12 : *
13 : * 1. Redistributions of source code must retain the above copyright
14 : * notice, this list of conditions and the following disclaimer.
15 : *
16 : * 2. Redistributions in binary form must reproduce the above copyright
17 : * notice, this list of conditions and the following disclaimer in
18 : * the documentation and/or other materials provided with the
19 : * distribution.
20 : *
21 : * 3. All advertising materials mentioning features or use of this
22 : * software must display the following acknowledgment:
23 : * "This product includes software developed by the OpenSSL Project
24 : * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 : *
26 : * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 : * endorse or promote products derived from this software without
28 : * prior written permission. For written permission, please contact
29 : * licensing@OpenSSL.org.
30 : *
31 : * 5. Products derived from this software may not be called "OpenSSL"
32 : * nor may "OpenSSL" appear in their names without prior written
33 : * permission of the OpenSSL Project.
34 : *
35 : * 6. Redistributions of any form whatsoever must retain the following
36 : * acknowledgment:
37 : * "This product includes software developed by the OpenSSL Project
38 : * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 : *
40 : * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 : * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 : * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 : * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 : * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 : * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 : * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 : * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 : * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 : * OF THE POSSIBILITY OF SUCH DAMAGE.
52 : * ====================================================================
53 : *
54 : * This product includes cryptographic software written by Eric Young
55 : * (eay@cryptsoft.com). This product includes software written by Tim
56 : * Hudson (tjh@cryptsoft.com).
57 : *
58 : */
59 :
60 : #include <stdio.h>
61 : #include <stdlib.h>
62 : #include "cryptlib.h"
63 : #include <openssl/objects.h>
64 : #include <openssl/evp.h>
65 : #include "evp_locl.h"
66 :
67 : #define M_check_autoarg(ctx, arg, arglen, err) \
68 : if (ctx->pmeth->flags & EVP_PKEY_FLAG_AUTOARGLEN) \
69 : { \
70 : size_t pksize = (size_t)EVP_PKEY_size(ctx->pkey); \
71 : if (!arg) \
72 : { \
73 : *arglen = pksize; \
74 : return 1; \
75 : } \
76 : else if (*arglen < pksize) \
77 : { \
78 : EVPerr(err, EVP_R_BUFFER_TOO_SMALL); /*ckerr_ignore*/\
79 : return 0; \
80 : } \
81 : }
82 :
83 381 : int EVP_PKEY_sign_init(EVP_PKEY_CTX *ctx)
84 : {
85 : int ret;
86 381 : if (!ctx || !ctx->pmeth || !ctx->pmeth->sign) {
87 0 : EVPerr(EVP_F_EVP_PKEY_SIGN_INIT,
88 : EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
89 0 : return -2;
90 : }
91 381 : ctx->operation = EVP_PKEY_OP_SIGN;
92 381 : if (!ctx->pmeth->sign_init)
93 : return 1;
94 0 : ret = ctx->pmeth->sign_init(ctx);
95 0 : if (ret <= 0)
96 0 : ctx->operation = EVP_PKEY_OP_UNDEFINED;
97 0 : return ret;
98 : }
99 :
100 389 : int EVP_PKEY_sign(EVP_PKEY_CTX *ctx,
101 : unsigned char *sig, size_t *siglen,
102 : const unsigned char *tbs, size_t tbslen)
103 : {
104 389 : if (!ctx || !ctx->pmeth || !ctx->pmeth->sign) {
105 0 : EVPerr(EVP_F_EVP_PKEY_SIGN,
106 : EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
107 0 : return -2;
108 : }
109 389 : if (ctx->operation != EVP_PKEY_OP_SIGN) {
110 0 : EVPerr(EVP_F_EVP_PKEY_SIGN, EVP_R_OPERATON_NOT_INITIALIZED);
111 0 : return -1;
112 : }
113 389 : M_check_autoarg(ctx, sig, siglen, EVP_F_EVP_PKEY_SIGN)
114 381 : return ctx->pmeth->sign(ctx, sig, siglen, tbs, tbslen);
115 : }
116 :
117 746 : int EVP_PKEY_verify_init(EVP_PKEY_CTX *ctx)
118 : {
119 : int ret;
120 746 : if (!ctx || !ctx->pmeth || !ctx->pmeth->verify) {
121 0 : EVPerr(EVP_F_EVP_PKEY_VERIFY_INIT,
122 : EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
123 0 : return -2;
124 : }
125 746 : ctx->operation = EVP_PKEY_OP_VERIFY;
126 746 : if (!ctx->pmeth->verify_init)
127 : return 1;
128 0 : ret = ctx->pmeth->verify_init(ctx);
129 0 : if (ret <= 0)
130 0 : ctx->operation = EVP_PKEY_OP_UNDEFINED;
131 0 : return ret;
132 : }
133 :
134 746 : int EVP_PKEY_verify(EVP_PKEY_CTX *ctx,
135 : const unsigned char *sig, size_t siglen,
136 : const unsigned char *tbs, size_t tbslen)
137 : {
138 746 : if (!ctx || !ctx->pmeth || !ctx->pmeth->verify) {
139 0 : EVPerr(EVP_F_EVP_PKEY_VERIFY,
140 : EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
141 0 : return -2;
142 : }
143 746 : if (ctx->operation != EVP_PKEY_OP_VERIFY) {
144 0 : EVPerr(EVP_F_EVP_PKEY_VERIFY, EVP_R_OPERATON_NOT_INITIALIZED);
145 0 : return -1;
146 : }
147 746 : return ctx->pmeth->verify(ctx, sig, siglen, tbs, tbslen);
148 : }
149 :
150 0 : int EVP_PKEY_verify_recover_init(EVP_PKEY_CTX *ctx)
151 : {
152 : int ret;
153 0 : if (!ctx || !ctx->pmeth || !ctx->pmeth->verify_recover) {
154 0 : EVPerr(EVP_F_EVP_PKEY_VERIFY_RECOVER_INIT,
155 : EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
156 0 : return -2;
157 : }
158 0 : ctx->operation = EVP_PKEY_OP_VERIFYRECOVER;
159 0 : if (!ctx->pmeth->verify_recover_init)
160 : return 1;
161 0 : ret = ctx->pmeth->verify_recover_init(ctx);
162 0 : if (ret <= 0)
163 0 : ctx->operation = EVP_PKEY_OP_UNDEFINED;
164 0 : return ret;
165 : }
166 :
167 0 : int EVP_PKEY_verify_recover(EVP_PKEY_CTX *ctx,
168 : unsigned char *rout, size_t *routlen,
169 : const unsigned char *sig, size_t siglen)
170 : {
171 0 : if (!ctx || !ctx->pmeth || !ctx->pmeth->verify_recover) {
172 0 : EVPerr(EVP_F_EVP_PKEY_VERIFY_RECOVER,
173 : EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
174 0 : return -2;
175 : }
176 0 : if (ctx->operation != EVP_PKEY_OP_VERIFYRECOVER) {
177 0 : EVPerr(EVP_F_EVP_PKEY_VERIFY_RECOVER, EVP_R_OPERATON_NOT_INITIALIZED);
178 0 : return -1;
179 : }
180 0 : M_check_autoarg(ctx, rout, routlen, EVP_F_EVP_PKEY_VERIFY_RECOVER)
181 0 : return ctx->pmeth->verify_recover(ctx, rout, routlen, sig, siglen);
182 : }
183 :
184 0 : int EVP_PKEY_encrypt_init(EVP_PKEY_CTX *ctx)
185 : {
186 : int ret;
187 0 : if (!ctx || !ctx->pmeth || !ctx->pmeth->encrypt) {
188 0 : EVPerr(EVP_F_EVP_PKEY_ENCRYPT_INIT,
189 : EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
190 0 : return -2;
191 : }
192 0 : ctx->operation = EVP_PKEY_OP_ENCRYPT;
193 0 : if (!ctx->pmeth->encrypt_init)
194 : return 1;
195 0 : ret = ctx->pmeth->encrypt_init(ctx);
196 0 : if (ret <= 0)
197 0 : ctx->operation = EVP_PKEY_OP_UNDEFINED;
198 0 : return ret;
199 : }
200 :
201 0 : int EVP_PKEY_encrypt(EVP_PKEY_CTX *ctx,
202 : unsigned char *out, size_t *outlen,
203 : const unsigned char *in, size_t inlen)
204 : {
205 0 : if (!ctx || !ctx->pmeth || !ctx->pmeth->encrypt) {
206 0 : EVPerr(EVP_F_EVP_PKEY_ENCRYPT,
207 : EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
208 0 : return -2;
209 : }
210 0 : if (ctx->operation != EVP_PKEY_OP_ENCRYPT) {
211 0 : EVPerr(EVP_F_EVP_PKEY_ENCRYPT, EVP_R_OPERATON_NOT_INITIALIZED);
212 0 : return -1;
213 : }
214 0 : M_check_autoarg(ctx, out, outlen, EVP_F_EVP_PKEY_ENCRYPT)
215 0 : return ctx->pmeth->encrypt(ctx, out, outlen, in, inlen);
216 : }
217 :
218 0 : int EVP_PKEY_decrypt_init(EVP_PKEY_CTX *ctx)
219 : {
220 : int ret;
221 0 : if (!ctx || !ctx->pmeth || !ctx->pmeth->decrypt) {
222 0 : EVPerr(EVP_F_EVP_PKEY_DECRYPT_INIT,
223 : EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
224 0 : return -2;
225 : }
226 0 : ctx->operation = EVP_PKEY_OP_DECRYPT;
227 0 : if (!ctx->pmeth->decrypt_init)
228 : return 1;
229 0 : ret = ctx->pmeth->decrypt_init(ctx);
230 0 : if (ret <= 0)
231 0 : ctx->operation = EVP_PKEY_OP_UNDEFINED;
232 0 : return ret;
233 : }
234 :
235 0 : int EVP_PKEY_decrypt(EVP_PKEY_CTX *ctx,
236 : unsigned char *out, size_t *outlen,
237 : const unsigned char *in, size_t inlen)
238 : {
239 0 : if (!ctx || !ctx->pmeth || !ctx->pmeth->decrypt) {
240 0 : EVPerr(EVP_F_EVP_PKEY_DECRYPT,
241 : EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
242 0 : return -2;
243 : }
244 0 : if (ctx->operation != EVP_PKEY_OP_DECRYPT) {
245 0 : EVPerr(EVP_F_EVP_PKEY_DECRYPT, EVP_R_OPERATON_NOT_INITIALIZED);
246 0 : return -1;
247 : }
248 0 : M_check_autoarg(ctx, out, outlen, EVP_F_EVP_PKEY_DECRYPT)
249 0 : return ctx->pmeth->decrypt(ctx, out, outlen, in, inlen);
250 : }
251 :
252 0 : int EVP_PKEY_derive_init(EVP_PKEY_CTX *ctx)
253 : {
254 : int ret;
255 0 : if (!ctx || !ctx->pmeth || !ctx->pmeth->derive) {
256 0 : EVPerr(EVP_F_EVP_PKEY_DERIVE_INIT,
257 : EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
258 0 : return -2;
259 : }
260 0 : ctx->operation = EVP_PKEY_OP_DERIVE;
261 0 : if (!ctx->pmeth->derive_init)
262 : return 1;
263 0 : ret = ctx->pmeth->derive_init(ctx);
264 0 : if (ret <= 0)
265 0 : ctx->operation = EVP_PKEY_OP_UNDEFINED;
266 0 : return ret;
267 : }
268 :
269 0 : int EVP_PKEY_derive_set_peer(EVP_PKEY_CTX *ctx, EVP_PKEY *peer)
270 : {
271 : int ret;
272 0 : if (!ctx || !ctx->pmeth
273 0 : || !(ctx->pmeth->derive || ctx->pmeth->encrypt || ctx->pmeth->decrypt)
274 0 : || !ctx->pmeth->ctrl) {
275 0 : EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER,
276 : EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
277 0 : return -2;
278 : }
279 0 : if (ctx->operation != EVP_PKEY_OP_DERIVE
280 0 : && ctx->operation != EVP_PKEY_OP_ENCRYPT
281 0 : && ctx->operation != EVP_PKEY_OP_DECRYPT) {
282 0 : EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER,
283 : EVP_R_OPERATON_NOT_INITIALIZED);
284 0 : return -1;
285 : }
286 :
287 0 : ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 0, peer);
288 :
289 0 : if (ret <= 0)
290 : return ret;
291 :
292 0 : if (ret == 2)
293 : return 1;
294 :
295 0 : if (!ctx->pkey) {
296 0 : EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER, EVP_R_NO_KEY_SET);
297 0 : return -1;
298 : }
299 :
300 0 : if (ctx->pkey->type != peer->type) {
301 0 : EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER, EVP_R_DIFFERENT_KEY_TYPES);
302 0 : return -1;
303 : }
304 :
305 : /*
306 : * ran@cryptocom.ru: For clarity. The error is if parameters in peer are
307 : * present (!missing) but don't match. EVP_PKEY_cmp_parameters may return
308 : * 1 (match), 0 (don't match) and -2 (comparison is not defined). -1
309 : * (different key types) is impossible here because it is checked earlier.
310 : * -2 is OK for us here, as well as 1, so we can check for 0 only.
311 : */
312 0 : if (!EVP_PKEY_missing_parameters(peer) &&
313 0 : !EVP_PKEY_cmp_parameters(ctx->pkey, peer)) {
314 0 : EVPerr(EVP_F_EVP_PKEY_DERIVE_SET_PEER, EVP_R_DIFFERENT_PARAMETERS);
315 0 : return -1;
316 : }
317 :
318 0 : if (ctx->peerkey)
319 0 : EVP_PKEY_free(ctx->peerkey);
320 0 : ctx->peerkey = peer;
321 :
322 0 : ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 1, peer);
323 :
324 0 : if (ret <= 0) {
325 0 : ctx->peerkey = NULL;
326 0 : return ret;
327 : }
328 :
329 0 : CRYPTO_add(&peer->references, 1, CRYPTO_LOCK_EVP_PKEY);
330 0 : return 1;
331 : }
332 :
333 0 : int EVP_PKEY_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *pkeylen)
334 : {
335 0 : if (!ctx || !ctx->pmeth || !ctx->pmeth->derive) {
336 0 : EVPerr(EVP_F_EVP_PKEY_DERIVE,
337 : EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
338 0 : return -2;
339 : }
340 0 : if (ctx->operation != EVP_PKEY_OP_DERIVE) {
341 0 : EVPerr(EVP_F_EVP_PKEY_DERIVE, EVP_R_OPERATON_NOT_INITIALIZED);
342 0 : return -1;
343 : }
344 0 : M_check_autoarg(ctx, key, pkeylen, EVP_F_EVP_PKEY_DERIVE)
345 0 : return ctx->pmeth->derive(ctx, key, pkeylen);
346 : }
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