1 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
4 /* ====================================================================
5 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
19 * 3. All advertising materials mentioning features or use of this
20 * software must display the following acknowledgment:
21 * "This product includes software developed by the OpenSSL Project
22 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
25 * endorse or promote products derived from this software without
26 * prior written permission. For written permission, please contact
27 * licensing@OpenSSL.org.
29 * 5. Products derived from this software may not be called "OpenSSL"
30 * nor may "OpenSSL" appear in their names without prior written
31 * permission of the OpenSSL Project.
33 * 6. Redistributions of any form whatsoever must retain the following
35 * "This product includes software developed by the OpenSSL Project
36 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
39 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
41 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
45 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
47 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
48 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
49 * OF THE POSSIBILITY OF SUCH DAMAGE.
50 * ====================================================================
52 * This product includes cryptographic software written by Eric Young
53 * (eay@cryptsoft.com). This product includes software written by Tim
54 * Hudson (tjh@cryptsoft.com).
60 #include <openssl/asn1t.h>
61 #include <openssl/x509.h>
62 #include <openssl/evp.h>
63 #include <openssl/dh.h>
64 #include <openssl/bn.h>
67 /* 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;
122 case EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN:
125 dctx->prime_len = p1;
128 case EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR:
129 dctx->generator = p1;
132 case EVP_PKEY_CTRL_PEER_KEY:
133 /* Default behaviour is OK */
143 static int pkey_dh_ctrl_str(EVP_PKEY_CTX *ctx,
144 const char *type, const char *value)
146 if (!strcmp(type, "dh_paramgen_prime_len"))
150 return EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, len);
152 if (!strcmp(type, "dh_paramgen_generator"))
156 return EVP_PKEY_CTX_set_dh_paramgen_generator(ctx, len);
161 static int pkey_dh_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
164 DH_PKEY_CTX *dctx = ctx->data;
170 evp_pkey_set_cb_translate(pcb, ctx);
177 ret = DH_generate_parameters_ex(dh,
178 dctx->prime_len, dctx->generator, pcb);
180 EVP_PKEY_assign_DH(pkey, dh);
186 static int pkey_dh_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
189 if (ctx->pkey == NULL)
191 DHerr(DH_F_PKEY_DH_KEYGEN, DH_R_NO_PARAMETERS_SET);
197 EVP_PKEY_assign_DH(pkey, dh);
198 /* Note: if error return, pkey is freed by parent routine */
199 if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
201 return DH_generate_key(pkey->pkey.dh);
204 static int pkey_dh_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen)
207 if (!ctx->pkey || !ctx->peerkey)
209 DHerr(DH_F_PKEY_DH_DERIVE, DH_R_KEYS_NOT_SET);
212 ret = DH_compute_key(key, ctx->peerkey->pkey.dh->pub_key,
220 const EVP_PKEY_METHOD dh_pkey_meth =
223 EVP_PKEY_FLAG_AUTOARGLEN,