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 */
76 /* Keygen callback info */
81 static int pkey_dh_init(EVP_PKEY_CTX *ctx)
84 dctx = OPENSSL_malloc(sizeof(DH_PKEY_CTX));
87 dctx->prime_len = 1024;
90 dctx->rfc5114_param = 0;
93 ctx->keygen_info = dctx->gentmp;
94 ctx->keygen_info_count = 2;
99 static int pkey_dh_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
101 DH_PKEY_CTX *dctx, *sctx;
102 if (!pkey_dh_init(dst))
106 dctx->prime_len = sctx->prime_len;
107 dctx->generator = sctx->generator;
108 dctx->use_dsa = sctx->use_dsa;
109 dctx->rfc5114_param = sctx->rfc5114_param;
113 static void pkey_dh_cleanup(EVP_PKEY_CTX *ctx)
115 DH_PKEY_CTX *dctx = ctx->data;
120 static int pkey_dh_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
122 DH_PKEY_CTX *dctx = ctx->data;
125 case EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN:
128 dctx->prime_len = p1;
131 case EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR:
132 dctx->generator = p1;
135 case EVP_PKEY_CTRL_DH_RFC5114:
136 if (p1 < 1 || p1 > 3)
138 dctx->rfc5114_param = p1;
141 case EVP_PKEY_CTRL_PEER_KEY:
142 /* Default behaviour is OK */
152 static int pkey_dh_ctrl_str(EVP_PKEY_CTX *ctx,
153 const char *type, const char *value)
155 if (!strcmp(type, "dh_paramgen_prime_len"))
159 return EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, len);
161 if (!strcmp(type, "dh_rfc5114"))
163 DH_PKEY_CTX *dctx = ctx->data;
166 if (len < 0 || len > 3)
168 dctx->rfc5114_param = len;
171 if (!strcmp(type, "dh_paramgen_generator"))
175 return EVP_PKEY_CTX_set_dh_paramgen_generator(ctx, len);
180 static int pkey_dh_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
183 DH_PKEY_CTX *dctx = ctx->data;
186 if (dctx->rfc5114_param)
188 switch (dctx->rfc5114_param)
191 dh = DH_get_1024_160();
195 dh = DH_get_2048_224();
199 dh = DH_get_2048_256();
205 EVP_PKEY_assign(pkey, EVP_PKEY_DHX, dh);
212 evp_pkey_set_cb_translate(pcb, ctx);
219 ret = DH_generate_parameters_ex(dh,
220 dctx->prime_len, dctx->generator, pcb);
222 EVP_PKEY_assign_DH(pkey, dh);
228 static int pkey_dh_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
231 if (ctx->pkey == NULL)
233 DHerr(DH_F_PKEY_DH_KEYGEN, DH_R_NO_PARAMETERS_SET);
239 EVP_PKEY_assign(pkey, ctx->pmeth->pkey_id, dh);
240 /* Note: if error return, pkey is freed by parent routine */
241 if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
243 return DH_generate_key(pkey->pkey.dh);
246 static int pkey_dh_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen)
249 if (!ctx->pkey || !ctx->peerkey)
251 DHerr(DH_F_PKEY_DH_DERIVE, DH_R_KEYS_NOT_SET);
254 ret = DH_compute_key(key, ctx->peerkey->pkey.dh->pub_key,
262 const EVP_PKEY_METHOD dh_pkey_meth =
265 EVP_PKEY_FLAG_AUTOARGLEN,
298 const EVP_PKEY_METHOD dhx_pkey_meth =
301 EVP_PKEY_FLAG_AUTOARGLEN,