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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 } | |
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