1 /* $OpenBSD: pmeth_gn.c,v 1.21 2024/08/31 09:14:21 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_local.h"
68 #include "bn_local.h"
69 #include "evp_local.h"
70
71 int
EVP_PKEY_paramgen_init(EVP_PKEY_CTX * ctx)72 EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx)
73 {
74 if (ctx == NULL || ctx->pmeth == NULL || ctx->pmeth->paramgen == NULL) {
75 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
76 return -2;
77 }
78
79 ctx->operation = EVP_PKEY_OP_PARAMGEN;
80
81 return 1;
82 }
83 LCRYPTO_ALIAS(EVP_PKEY_paramgen_init);
84
85 int
EVP_PKEY_paramgen(EVP_PKEY_CTX * ctx,EVP_PKEY ** ppkey)86 EVP_PKEY_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
87 {
88 int ret;
89
90 if (ctx == NULL || ctx->pmeth == NULL || ctx->pmeth->paramgen == NULL) {
91 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
92 return -2;
93 }
94
95 if (ctx->operation != EVP_PKEY_OP_PARAMGEN) {
96 EVPerror(EVP_R_OPERATON_NOT_INITIALIZED);
97 return -1;
98 }
99
100 if (ppkey == NULL)
101 return -1;
102
103 if (*ppkey == NULL)
104 *ppkey = EVP_PKEY_new();
105 if (*ppkey == NULL)
106 return -1;
107
108 if ((ret = ctx->pmeth->paramgen(ctx, *ppkey)) <= 0) {
109 EVP_PKEY_free(*ppkey);
110 *ppkey = NULL;
111 }
112
113 return ret;
114 }
115 LCRYPTO_ALIAS(EVP_PKEY_paramgen);
116
117 int
EVP_PKEY_keygen_init(EVP_PKEY_CTX * ctx)118 EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx)
119 {
120 if (ctx == NULL || ctx->pmeth == NULL || ctx->pmeth->keygen == NULL) {
121 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
122 return -2;
123 }
124
125 ctx->operation = EVP_PKEY_OP_KEYGEN;
126
127 return 1;
128 }
129 LCRYPTO_ALIAS(EVP_PKEY_keygen_init);
130
131 int
EVP_PKEY_keygen(EVP_PKEY_CTX * ctx,EVP_PKEY ** ppkey)132 EVP_PKEY_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
133 {
134 int ret;
135
136 if (ctx == NULL || ctx->pmeth == NULL || ctx->pmeth->keygen == NULL) {
137 EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
138 return -2;
139 }
140 if (ctx->operation != EVP_PKEY_OP_KEYGEN) {
141 EVPerror(EVP_R_OPERATON_NOT_INITIALIZED);
142 return -1;
143 }
144
145 if (ppkey == NULL)
146 return -1;
147
148 if (*ppkey == NULL)
149 *ppkey = EVP_PKEY_new();
150 if (*ppkey == NULL)
151 return -1;
152
153 if ((ret = ctx->pmeth->keygen(ctx, *ppkey)) <= 0) {
154 EVP_PKEY_free(*ppkey);
155 *ppkey = NULL;
156 }
157
158 return ret;
159 }
160 LCRYPTO_ALIAS(EVP_PKEY_keygen);
161
162 void
EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX * ctx,EVP_PKEY_gen_cb * cb)163 EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX *ctx, EVP_PKEY_gen_cb *cb)
164 {
165 ctx->pkey_gencb = cb;
166 }
167 LCRYPTO_ALIAS(EVP_PKEY_CTX_set_cb);
168
169 EVP_PKEY_gen_cb *
EVP_PKEY_CTX_get_cb(EVP_PKEY_CTX * ctx)170 EVP_PKEY_CTX_get_cb(EVP_PKEY_CTX *ctx)
171 {
172 return ctx->pkey_gencb;
173 }
174 LCRYPTO_ALIAS(EVP_PKEY_CTX_get_cb);
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 LCRYPTO_ALIAS(EVP_PKEY_CTX_get_keygen_info);
205
206 EVP_PKEY *
EVP_PKEY_new_mac_key(int type,ENGINE * e,const unsigned char * key,int keylen)207 EVP_PKEY_new_mac_key(int type, ENGINE *e, const unsigned char *key, int keylen)
208 {
209 EVP_PKEY_CTX *mac_ctx = NULL;
210 EVP_PKEY *mac_key = NULL;
211
212 mac_ctx = EVP_PKEY_CTX_new_id(type, NULL);
213 if (!mac_ctx)
214 return NULL;
215 if (EVP_PKEY_keygen_init(mac_ctx) <= 0)
216 goto merr;
217 if (EVP_PKEY_CTX_ctrl(mac_ctx, -1, EVP_PKEY_OP_KEYGEN,
218 EVP_PKEY_CTRL_SET_MAC_KEY, keylen, (void *)key) <= 0)
219 goto merr;
220 if (EVP_PKEY_keygen(mac_ctx, &mac_key) <= 0)
221 goto merr;
222
223 merr:
224 EVP_PKEY_CTX_free(mac_ctx);
225 return mac_key;
226 }
227 LCRYPTO_ALIAS(EVP_PKEY_new_mac_key);
228