2 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
5 /* ====================================================================
6 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
61 #include <openssl/asn1t.h>
62 #include <openssl/x509.h>
63 #include <openssl/evp.h>
64 #include <openssl/dh.h>
65 #include <openssl/bn.h>
68 /* DH pkey context structure */
71 /* Parameter gen parameters */
75 /* Keygen callback info */
80 static int pkey_dh_init(EVP_PKEY_CTX *ctx)
83 dctx = OPENSSL_malloc(sizeof(DH_PKEY_CTX));
86 dctx->prime_len = 1024;
91 ctx->keygen_info = dctx->gentmp;
92 ctx->keygen_info_count = 2;
97 static int pkey_dh_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
99 DH_PKEY_CTX *dctx, *sctx;
100 if (!pkey_dh_init(dst))
104 dctx->prime_len = sctx->prime_len;
105 dctx->generator = sctx->generator;
106 dctx->use_dsa = sctx->use_dsa;
110 static void pkey_dh_cleanup(EVP_PKEY_CTX *ctx)
112 DH_PKEY_CTX *dctx = ctx->data;
117 static int pkey_dh_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
119 DH_PKEY_CTX *dctx = ctx->data;
121 case EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN:
124 dctx->prime_len = p1;
127 case EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR:
128 dctx->generator = p1;
131 case EVP_PKEY_CTRL_PEER_KEY:
132 /* Default behaviour is OK */
141 static int pkey_dh_ctrl_str(EVP_PKEY_CTX *ctx,
142 const char *type, const char *value)
144 if (!strcmp(type, "dh_paramgen_prime_len")) {
147 return EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, len);
149 if (!strcmp(type, "dh_paramgen_generator")) {
152 return EVP_PKEY_CTX_set_dh_paramgen_generator(ctx, len);
157 static int pkey_dh_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
160 DH_PKEY_CTX *dctx = ctx->data;
163 if (ctx->pkey_gencb) {
165 evp_pkey_set_cb_translate(pcb, ctx);
171 ret = DH_generate_parameters_ex(dh,
172 dctx->prime_len, dctx->generator, pcb);
174 EVP_PKEY_assign_DH(pkey, dh);
180 static int pkey_dh_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
183 if (ctx->pkey == NULL) {
184 DHerr(DH_F_PKEY_DH_KEYGEN, DH_R_NO_PARAMETERS_SET);
190 EVP_PKEY_assign_DH(pkey, dh);
191 /* Note: if error return, pkey is freed by parent routine */
192 if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
194 return DH_generate_key(pkey->pkey.dh);
197 static int pkey_dh_derive(EVP_PKEY_CTX *ctx, unsigned char *key,
201 if (!ctx->pkey || !ctx->peerkey) {
202 DHerr(DH_F_PKEY_DH_DERIVE, DH_R_KEYS_NOT_SET);
205 ret = DH_compute_key(key, ctx->peerkey->pkey.dh->pub_key,
213 const EVP_PKEY_METHOD dh_pkey_meth = {
215 EVP_PKEY_FLAG_AUTOARGLEN,