1 /* $OpenBSD: pmeth_gn.c,v 1.10 2022/01/10 12:10:26 tb 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/bn.h>
63 #include <openssl/err.h>
64 #include <openssl/evp.h>
65 #include <openssl/objects.h>
66
67 #include "asn1_locl.h"
68 #include "bn_lcl.h"
69 #include "evp_locl.h"
70
71 int
EVP_PKEY_paramgen_init(EVP_PKEY_CTX * ctx)72 EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx)
73 {
74 int ret;
75
76 if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) {
77 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
78 return -2;
79 }
80 ctx->operation = EVP_PKEY_OP_PARAMGEN;
81 if (!ctx->pmeth->paramgen_init)
82 return 1;
83 ret = ctx->pmeth->paramgen_init(ctx);
84 if (ret <= 0)
85 ctx->operation = EVP_PKEY_OP_UNDEFINED;
86 return ret;
87 }
88
89 int
EVP_PKEY_paramgen(EVP_PKEY_CTX * ctx,EVP_PKEY ** ppkey)90 EVP_PKEY_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
91 {
92 int ret;
93
94 if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) {
95 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
96 return -2;
97 }
98
99 if (ctx->operation != EVP_PKEY_OP_PARAMGEN) {
100 EVPerror(EVP_R_OPERATON_NOT_INITIALIZED);
101 return -1;
102 }
103
104 if (!ppkey)
105 return -1;
106
107 if (!*ppkey)
108 *ppkey = EVP_PKEY_new();
109
110 ret = ctx->pmeth->paramgen(ctx, *ppkey);
111 if (ret <= 0) {
112 EVP_PKEY_free(*ppkey);
113 *ppkey = NULL;
114 }
115 return ret;
116 }
117
118 int
EVP_PKEY_keygen_init(EVP_PKEY_CTX * ctx)119 EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx)
120 {
121 int ret;
122
123 if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) {
124 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
125 return -2;
126 }
127 ctx->operation = EVP_PKEY_OP_KEYGEN;
128 if (!ctx->pmeth->keygen_init)
129 return 1;
130 ret = ctx->pmeth->keygen_init(ctx);
131 if (ret <= 0)
132 ctx->operation = EVP_PKEY_OP_UNDEFINED;
133 return ret;
134 }
135
136 int
EVP_PKEY_keygen(EVP_PKEY_CTX * ctx,EVP_PKEY ** ppkey)137 EVP_PKEY_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
138 {
139 int ret;
140
141 if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) {
142 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
143 return -2;
144 }
145 if (ctx->operation != EVP_PKEY_OP_KEYGEN) {
146 EVPerror(EVP_R_OPERATON_NOT_INITIALIZED);
147 return -1;
148 }
149
150 if (!ppkey)
151 return -1;
152
153 if (!*ppkey)
154 *ppkey = EVP_PKEY_new();
155
156 ret = ctx->pmeth->keygen(ctx, *ppkey);
157 if (ret <= 0) {
158 EVP_PKEY_free(*ppkey);
159 *ppkey = NULL;
160 }
161 return ret;
162 }
163
164 void
EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX * ctx,EVP_PKEY_gen_cb * cb)165 EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX *ctx, EVP_PKEY_gen_cb *cb)
166 {
167 ctx->pkey_gencb = cb;
168 }
169
170 EVP_PKEY_gen_cb *
EVP_PKEY_CTX_get_cb(EVP_PKEY_CTX * ctx)171 EVP_PKEY_CTX_get_cb(EVP_PKEY_CTX *ctx)
172 {
173 return ctx->pkey_gencb;
174 }
175
176 /* "translation callback" to call EVP_PKEY_CTX callbacks using BN_GENCB
177 * style callbacks.
178 */
179
180 static int
trans_cb(int a,int b,BN_GENCB * gcb)181 trans_cb(int a, int b, BN_GENCB *gcb)
182 {
183 EVP_PKEY_CTX *ctx = gcb->arg;
184 ctx->keygen_info[0] = a;
185 ctx->keygen_info[1] = b;
186 return ctx->pkey_gencb(ctx);
187 }
188
189 void
evp_pkey_set_cb_translate(BN_GENCB * cb,EVP_PKEY_CTX * ctx)190 evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx)
191 {
192 BN_GENCB_set(cb, trans_cb, ctx);
193 }
194
195 int
EVP_PKEY_CTX_get_keygen_info(EVP_PKEY_CTX * ctx,int idx)196 EVP_PKEY_CTX_get_keygen_info(EVP_PKEY_CTX *ctx, int idx)
197 {
198 if (idx == -1)
199 return ctx->keygen_info_count;
200 if (idx < 0 || idx > ctx->keygen_info_count)
201 return 0;
202 return ctx->keygen_info[idx];
203 }
204
205 EVP_PKEY *
EVP_PKEY_new_mac_key(int type,ENGINE * e,const unsigned char * key,int keylen)206 EVP_PKEY_new_mac_key(int type, ENGINE *e, const unsigned char *key, int keylen)
207 {
208 EVP_PKEY_CTX *mac_ctx = NULL;
209 EVP_PKEY *mac_key = NULL;
210
211 mac_ctx = EVP_PKEY_CTX_new_id(type, e);
212 if (!mac_ctx)
213 return NULL;
214 if (EVP_PKEY_keygen_init(mac_ctx) <= 0)
215 goto merr;
216 if (EVP_PKEY_CTX_ctrl(mac_ctx, -1, EVP_PKEY_OP_KEYGEN,
217 EVP_PKEY_CTRL_SET_MAC_KEY, keylen, (void *)key) <= 0)
218 goto merr;
219 if (EVP_PKEY_keygen(mac_ctx, &mac_key) <= 0)
220 goto merr;
221
222 merr:
223 EVP_PKEY_CTX_free(mac_ctx);
224 return mac_key;
225 }
226
227 int
EVP_PKEY_check(EVP_PKEY_CTX * ctx)228 EVP_PKEY_check(EVP_PKEY_CTX *ctx)
229 {
230 EVP_PKEY *pkey;
231
232 if ((pkey = ctx->pkey) == NULL) {
233 EVPerror(EVP_R_NO_KEY_SET);
234 return 0;
235 }
236
237 if (ctx->pmeth->check != NULL)
238 return ctx->pmeth->check(pkey);
239
240 if (pkey->ameth == NULL || pkey->ameth->pkey_check == NULL) {
241 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
242 return -2;
243 }
244
245 return pkey->ameth->pkey_check(pkey);
246 }
247
248 int
EVP_PKEY_public_check(EVP_PKEY_CTX * ctx)249 EVP_PKEY_public_check(EVP_PKEY_CTX *ctx)
250 {
251 EVP_PKEY *pkey;
252
253 if ((pkey = ctx->pkey) == NULL) {
254 EVPerror(EVP_R_NO_KEY_SET);
255 return 0;
256 }
257
258 if (ctx->pmeth->public_check != NULL)
259 return ctx->pmeth->public_check(pkey);
260
261 if (pkey->ameth == NULL || pkey->ameth->pkey_public_check == NULL) {
262 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
263 return -2;
264 }
265
266 return pkey->ameth->pkey_public_check(pkey);
267 }
268
269 int
EVP_PKEY_param_check(EVP_PKEY_CTX * ctx)270 EVP_PKEY_param_check(EVP_PKEY_CTX *ctx)
271 {
272 EVP_PKEY *pkey;
273
274 if ((pkey = ctx->pkey) == NULL) {
275 EVPerror(EVP_R_NO_KEY_SET);
276 return 0;
277 }
278
279 if (ctx->pmeth->param_check != NULL)
280 return ctx->pmeth->param_check(pkey);
281
282 if (pkey->ameth == NULL || pkey->ameth->pkey_param_check == NULL) {
283 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
284 return -2;
285 }
286
287 return pkey->ameth->pkey_param_check(pkey);
288 }
289