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
67int 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
85int 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
116int 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
134int 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
165void EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX *ctx, EVP_PKEY_gen_cb *cb)
166	{
167	ctx->pkey_gencb = cb;
168	}
169
170EVP_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
179static 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
187void evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx)
188	{
189	BN_GENCB_set(cb, trans_cb, ctx)
190	}
191
192int 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
201EVP_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	}
222