1 /* pmeth_gn.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 <openssl/bn.h>
66 #include "evp_locl.h"
67
EVP_PKEY_paramgen_init(EVP_PKEY_CTX * ctx)68 int EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx)
69 {
70 int ret;
71 if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) {
72 EVPerr(EVP_F_EVP_PKEY_PARAMGEN_INIT,
73 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
74 return -2;
75 }
76 ctx->operation = EVP_PKEY_OP_PARAMGEN;
77 if (!ctx->pmeth->paramgen_init)
78 return 1;
79 ret = ctx->pmeth->paramgen_init(ctx);
80 if (ret <= 0)
81 ctx->operation = EVP_PKEY_OP_UNDEFINED;
82 return ret;
83 }
84
EVP_PKEY_paramgen(EVP_PKEY_CTX * ctx,EVP_PKEY ** ppkey)85 int EVP_PKEY_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
86 {
87 int ret;
88 if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) {
89 EVPerr(EVP_F_EVP_PKEY_PARAMGEN,
90 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
91 return -2;
92 }
93
94 if (ctx->operation != EVP_PKEY_OP_PARAMGEN) {
95 EVPerr(EVP_F_EVP_PKEY_PARAMGEN, EVP_R_OPERATON_NOT_INITIALIZED);
96 return -1;
97 }
98
99 if (ppkey == NULL)
100 return -1;
101
102 if (*ppkey == NULL)
103 *ppkey = EVP_PKEY_new();
104
105 if (*ppkey == NULL) {
106 EVPerr(EVP_F_EVP_PKEY_PARAMGEN, ERR_R_MALLOC_FAILURE);
107 return -1;
108 }
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
EVP_PKEY_keygen_init(EVP_PKEY_CTX * ctx)118 int EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx)
119 {
120 int ret;
121 if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) {
122 EVPerr(EVP_F_EVP_PKEY_KEYGEN_INIT,
123 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
124 return -2;
125 }
126 ctx->operation = EVP_PKEY_OP_KEYGEN;
127 if (!ctx->pmeth->keygen_init)
128 return 1;
129 ret = ctx->pmeth->keygen_init(ctx);
130 if (ret <= 0)
131 ctx->operation = EVP_PKEY_OP_UNDEFINED;
132 return ret;
133 }
134
EVP_PKEY_keygen(EVP_PKEY_CTX * ctx,EVP_PKEY ** ppkey)135 int EVP_PKEY_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
136 {
137 int ret;
138
139 if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) {
140 EVPerr(EVP_F_EVP_PKEY_KEYGEN,
141 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
142 return -2;
143 }
144 if (ctx->operation != EVP_PKEY_OP_KEYGEN) {
145 EVPerr(EVP_F_EVP_PKEY_KEYGEN, EVP_R_OPERATON_NOT_INITIALIZED);
146 return -1;
147 }
148
149 if (!ppkey)
150 return -1;
151
152 if (*ppkey == NULL)
153 *ppkey = EVP_PKEY_new();
154 if (*ppkey == NULL)
155 return -1;
156
157 ret = ctx->pmeth->keygen(ctx, *ppkey);
158 if (ret <= 0) {
159 EVP_PKEY_free(*ppkey);
160 *ppkey = NULL;
161 }
162 return ret;
163 }
164
EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX * ctx,EVP_PKEY_gen_cb * cb)165 void EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX *ctx, EVP_PKEY_gen_cb *cb)
166 {
167 ctx->pkey_gencb = cb;
168 }
169
EVP_PKEY_CTX_get_cb(EVP_PKEY_CTX * ctx)170 EVP_PKEY_gen_cb *EVP_PKEY_CTX_get_cb(EVP_PKEY_CTX *ctx)
171 {
172 return ctx->pkey_gencb;
173 }
174
175 /*
176 * "translation callback" to call EVP_PKEY_CTX callbacks using BN_GENCB style
177 * callbacks.
178 */
179
trans_cb(int a,int b,BN_GENCB * gcb)180 static int trans_cb(int a, int b, BN_GENCB *gcb)
181 {
182 EVP_PKEY_CTX *ctx = gcb->arg;
183 ctx->keygen_info[0] = a;
184 ctx->keygen_info[1] = b;
185 return ctx->pkey_gencb(ctx);
186 }
187
evp_pkey_set_cb_translate(BN_GENCB * cb,EVP_PKEY_CTX * ctx)188 void evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx)
189 {
190 BN_GENCB_set(cb, trans_cb, ctx)
191 }
192
EVP_PKEY_CTX_get_keygen_info(EVP_PKEY_CTX * ctx,int idx)193 int EVP_PKEY_CTX_get_keygen_info(EVP_PKEY_CTX *ctx, int idx)
194 {
195 if (idx == -1)
196 return ctx->keygen_info_count;
197 if (idx < 0 || idx > ctx->keygen_info_count)
198 return 0;
199 return ctx->keygen_info[idx];
200 }
201
EVP_PKEY_new_mac_key(int type,ENGINE * e,const unsigned char * key,int keylen)202 EVP_PKEY *EVP_PKEY_new_mac_key(int type, ENGINE *e,
203 const unsigned char *key, int keylen)
204 {
205 EVP_PKEY_CTX *mac_ctx = NULL;
206 EVP_PKEY *mac_key = NULL;
207 mac_ctx = EVP_PKEY_CTX_new_id(type, e);
208 if (!mac_ctx)
209 return NULL;
210 if (EVP_PKEY_keygen_init(mac_ctx) <= 0)
211 goto merr;
212 if (EVP_PKEY_CTX_ctrl(mac_ctx, -1, EVP_PKEY_OP_KEYGEN,
213 EVP_PKEY_CTRL_SET_MAC_KEY,
214 keylen, (void *)key) <= 0)
215 goto merr;
216 if (EVP_PKEY_keygen(mac_ctx, &mac_key) <= 0)
217 goto merr;
218 merr:
219 if (mac_ctx)
220 EVP_PKEY_CTX_free(mac_ctx);
221 return mac_key;
222 }
223