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