1 /* $OpenBSD: pmeth_fn.c,v 1.6 2017/01/29 17:49:23 beck Exp $ */
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
62 #include <openssl/err.h>
63 #include <openssl/evp.h>
64 #include <openssl/objects.h>
65
66 #include "evp_locl.h"
67
68 #define M_check_autoarg(ctx, arg, arglen, err) \
69 if (ctx->pmeth->flags & EVP_PKEY_FLAG_AUTOARGLEN) \
70 { \
71 size_t pksize = (size_t)EVP_PKEY_size(ctx->pkey); \
72 if (!arg) \
73 { \
74 *arglen = pksize; \
75 return 1; \
76 } \
77 else if (*arglen < pksize) \
78 { \
79 EVPerror(EVP_R_BUFFER_TOO_SMALL); /*ckerr_ignore*/\
80 return 0; \
81 } \
82 }
83
84 int
EVP_PKEY_sign_init(EVP_PKEY_CTX * ctx)85 EVP_PKEY_sign_init(EVP_PKEY_CTX *ctx)
86 {
87 int ret;
88
89 if (!ctx || !ctx->pmeth || !ctx->pmeth->sign) {
90 EVPerror(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
102 int
EVP_PKEY_sign(EVP_PKEY_CTX * ctx,unsigned char * sig,size_t * siglen,const unsigned char * tbs,size_t tbslen)103 EVP_PKEY_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
104 const unsigned char *tbs, size_t tbslen)
105 {
106 if (!ctx || !ctx->pmeth || !ctx->pmeth->sign) {
107 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
108 return -2;
109 }
110 if (ctx->operation != EVP_PKEY_OP_SIGN) {
111 EVPerror(EVP_R_OPERATON_NOT_INITIALIZED);
112 return -1;
113 }
114 M_check_autoarg(ctx, sig, siglen, EVP_F_EVP_PKEY_SIGN)
115 return ctx->pmeth->sign(ctx, sig, siglen, tbs, tbslen);
116 }
117
118 int
EVP_PKEY_verify_init(EVP_PKEY_CTX * ctx)119 EVP_PKEY_verify_init(EVP_PKEY_CTX *ctx)
120 {
121 int ret;
122
123 if (!ctx || !ctx->pmeth || !ctx->pmeth->verify) {
124 EVPerror(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
136 int
EVP_PKEY_verify(EVP_PKEY_CTX * ctx,const unsigned char * sig,size_t siglen,const unsigned char * tbs,size_t tbslen)137 EVP_PKEY_verify(EVP_PKEY_CTX *ctx, 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 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
142 return -2;
143 }
144 if (ctx->operation != EVP_PKEY_OP_VERIFY) {
145 EVPerror(EVP_R_OPERATON_NOT_INITIALIZED);
146 return -1;
147 }
148 return ctx->pmeth->verify(ctx, sig, siglen, tbs, tbslen);
149 }
150
151 int
EVP_PKEY_verify_recover_init(EVP_PKEY_CTX * ctx)152 EVP_PKEY_verify_recover_init(EVP_PKEY_CTX *ctx)
153 {
154 int ret;
155
156 if (!ctx || !ctx->pmeth || !ctx->pmeth->verify_recover) {
157 EVPerror(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
169 int
EVP_PKEY_verify_recover(EVP_PKEY_CTX * ctx,unsigned char * rout,size_t * routlen,const unsigned char * sig,size_t siglen)170 EVP_PKEY_verify_recover(EVP_PKEY_CTX *ctx, 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 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
175 return -2;
176 }
177 if (ctx->operation != EVP_PKEY_OP_VERIFYRECOVER) {
178 EVPerror(EVP_R_OPERATON_NOT_INITIALIZED);
179 return -1;
180 }
181 M_check_autoarg(ctx, rout, routlen, EVP_F_EVP_PKEY_VERIFY_RECOVER)
182 return ctx->pmeth->verify_recover(ctx, rout, routlen, sig, siglen);
183 }
184
185 int
EVP_PKEY_encrypt_init(EVP_PKEY_CTX * ctx)186 EVP_PKEY_encrypt_init(EVP_PKEY_CTX *ctx)
187 {
188 int ret;
189
190 if (!ctx || !ctx->pmeth || !ctx->pmeth->encrypt) {
191 EVPerror(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
203 int
EVP_PKEY_encrypt(EVP_PKEY_CTX * ctx,unsigned char * out,size_t * outlen,const unsigned char * in,size_t inlen)204 EVP_PKEY_encrypt(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
205 const unsigned char *in, size_t inlen)
206 {
207 if (!ctx || !ctx->pmeth || !ctx->pmeth->encrypt) {
208 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
209 return -2;
210 }
211 if (ctx->operation != EVP_PKEY_OP_ENCRYPT) {
212 EVPerror(EVP_R_OPERATON_NOT_INITIALIZED);
213 return -1;
214 }
215 M_check_autoarg(ctx, out, outlen, EVP_F_EVP_PKEY_ENCRYPT)
216 return ctx->pmeth->encrypt(ctx, out, outlen, in, inlen);
217 }
218
219 int
EVP_PKEY_decrypt_init(EVP_PKEY_CTX * ctx)220 EVP_PKEY_decrypt_init(EVP_PKEY_CTX *ctx)
221 {
222 int ret;
223
224 if (!ctx || !ctx->pmeth || !ctx->pmeth->decrypt) {
225 EVPerror(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
237 int
EVP_PKEY_decrypt(EVP_PKEY_CTX * ctx,unsigned char * out,size_t * outlen,const unsigned char * in,size_t inlen)238 EVP_PKEY_decrypt(EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
239 const unsigned char *in, size_t inlen)
240 {
241 if (!ctx || !ctx->pmeth || !ctx->pmeth->decrypt) {
242 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
243 return -2;
244 }
245 if (ctx->operation != EVP_PKEY_OP_DECRYPT) {
246 EVPerror(EVP_R_OPERATON_NOT_INITIALIZED);
247 return -1;
248 }
249 M_check_autoarg(ctx, out, outlen, EVP_F_EVP_PKEY_DECRYPT)
250 return ctx->pmeth->decrypt(ctx, out, outlen, in, inlen);
251 }
252
253 int
EVP_PKEY_derive_init(EVP_PKEY_CTX * ctx)254 EVP_PKEY_derive_init(EVP_PKEY_CTX *ctx)
255 {
256 int ret;
257
258 if (!ctx || !ctx->pmeth || !ctx->pmeth->derive) {
259 EVPerror(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
271 int
EVP_PKEY_derive_set_peer(EVP_PKEY_CTX * ctx,EVP_PKEY * peer)272 EVP_PKEY_derive_set_peer(EVP_PKEY_CTX *ctx, EVP_PKEY *peer)
273 {
274 int ret;
275
276 if (!ctx || !ctx->pmeth || !(ctx->pmeth->derive ||
277 ctx->pmeth->encrypt || ctx->pmeth->decrypt) ||
278 !ctx->pmeth->ctrl) {
279 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
280 return -2;
281 }
282 if (ctx->operation != EVP_PKEY_OP_DERIVE &&
283 ctx->operation != EVP_PKEY_OP_ENCRYPT &&
284 ctx->operation != EVP_PKEY_OP_DECRYPT) {
285 EVPerror(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 EVPerror(EVP_R_NO_KEY_SET);
299 return -1;
300 }
301
302 if (ctx->pkey->type != peer->type) {
303 EVPerror(EVP_R_DIFFERENT_KEY_TYPES);
304 return -1;
305 }
306
307 /* ran@cryptocom.ru: For clarity. The error is if parameters in peer are
308 * present (!missing) but don't match. EVP_PKEY_cmp_parameters may return
309 * 1 (match), 0 (don't match) and -2 (comparison is not defined). -1
310 * (different key types) is impossible here because it is checked earlier.
311 * -2 is OK for us here, as well as 1, so we can check for 0 only. */
312 if (!EVP_PKEY_missing_parameters(peer) &&
313 !EVP_PKEY_cmp_parameters(ctx->pkey, peer)) {
314 EVPerror(EVP_R_DIFFERENT_PARAMETERS);
315 return -1;
316 }
317
318 EVP_PKEY_free(ctx->peerkey);
319 ctx->peerkey = peer;
320
321 ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 1, peer);
322
323 if (ret <= 0) {
324 ctx->peerkey = NULL;
325 return ret;
326 }
327
328 CRYPTO_add(&peer->references, 1, CRYPTO_LOCK_EVP_PKEY);
329 return 1;
330 }
331
332 int
EVP_PKEY_derive(EVP_PKEY_CTX * ctx,unsigned char * key,size_t * pkeylen)333 EVP_PKEY_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *pkeylen)
334 {
335 if (!ctx || !ctx->pmeth || !ctx->pmeth->derive) {
336 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
337 return -2;
338 }
339 if (ctx->operation != EVP_PKEY_OP_DERIVE) {
340 EVPerror(EVP_R_OPERATON_NOT_INITIALIZED);
341 return -1;
342 }
343 M_check_autoarg(ctx, key, pkeylen, EVP_F_EVP_PKEY_DERIVE)
344 return ctx->pmeth->derive(ctx, key, pkeylen);
345 }
346