1 /* pmeth_gn.c */
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 #include "cryptlib.h"
62 #include <openssl/objects.h>
63 #include <openssl/evp.h>
64 #include <openssl/bn.h>
65 #include "evp_locl.h"
66
67 int EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx)
68 {
69 int ret;
70 if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen)
71 {
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
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 {
90 EVPerr(EVP_F_EVP_PKEY_PARAMGEN,
91 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
92 return -2;
93 }
94
95 if (ctx->operation != EVP_PKEY_OP_PARAMGEN)
96 {
97 EVPerr(EVP_F_EVP_PKEY_PARAMGEN, EVP_R_OPERATON_NOT_INITIALIZED);
98 return -1;
99 }
100
101 if (!ppkey)
102 return -1;
103
104 if (!*ppkey)
105 *ppkey = EVP_PKEY_new();
106
107 ret = ctx->pmeth->paramgen(ctx, *ppkey);
108 if (ret <= 0)
109 {
110 EVP_PKEY_free(*ppkey);
111 *ppkey = NULL;
112 }
113 return ret;
114 }
115
116 int EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx)
117 {
118 int ret;
119 if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen)
120 {
121 EVPerr(EVP_F_EVP_PKEY_KEYGEN_INIT,
122 EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
123 return -2;
124 }
125 ctx->operation = EVP_PKEY_OP_KEYGEN;
126 if (!ctx->pmeth->keygen_init)
127 return 1;
128 ret = ctx->pmeth->keygen_init(ctx);
129 if (ret <= 0)
130 ctx->operation = EVP_PKEY_OP_UNDEFINED;
131 return ret;
132 }
133
134 int EVP_PKEY_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
135 {
136 int ret;
137
138 if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen)
139 {
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 {
146 EVPerr(EVP_F_EVP_PKEY_KEYGEN, 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 {
159 EVP_PKEY_free(*ppkey);
160 *ppkey = NULL;
161 }
162 return ret;
163 }
164
165 void 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 {
172 return ctx->pkey_gencb;
173 }
174
175 /* "translation callback" to call EVP_PKEY_CTX callbacks using BN_GENCB
176 * style callbacks.
177 */
178
179 static int trans_cb(int a, int b, BN_GENCB *gcb)
180 {
181 EVP_PKEY_CTX *ctx = gcb->arg;
182 ctx->keygen_info[0] = a;
183 ctx->keygen_info[1] = b;
184 return ctx->pkey_gencb(ctx);
185 }
186
187 void evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx)
188 {
189 BN_GENCB_set(cb, trans_cb, ctx)
190 }
191
192 int EVP_PKEY_CTX_get_keygen_info(EVP_PKEY_CTX *ctx, int idx)
193 {
194 if (idx == -1)
195 return ctx->keygen_info_count;
196 if (idx < 0 || idx > ctx->keygen_info_count)
197 return 0;
198 return ctx->keygen_info[idx];
199 }
200
201 EVP_PKEY *EVP_PKEY_new_mac_key(int type, ENGINE *e,
202 const unsigned char *key, int keylen)
203 {
204 EVP_PKEY_CTX *mac_ctx = NULL;
205 EVP_PKEY *mac_key = NULL;
206 mac_ctx = EVP_PKEY_CTX_new_id(type, e);
207 if (!mac_ctx)
208 return NULL;
209 if (EVP_PKEY_keygen_init(mac_ctx) <= 0)
210 goto merr;
211 if (EVP_PKEY_CTX_ctrl(mac_ctx, -1, EVP_PKEY_OP_KEYGEN,
212 EVP_PKEY_CTRL_SET_MAC_KEY,
213 keylen, (void *)key) <= 0)
214 goto merr;
215 if (EVP_PKEY_keygen(mac_ctx, &mac_key) <= 0)
216 goto merr;
217 merr:
218 if (mac_ctx)
219 EVP_PKEY_CTX_free(mac_ctx);
220 return mac_key;
221 }