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adbc603d DSH |
1 | /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL |
2 | * project 2006. | |
3 | */ | |
4 | /* ==================================================================== | |
5 | * Copyright (c) 2006 The OpenSSL Project. All rights reserved. | |
6 | * | |
7 | * Redistribution and use in source and binary forms, with or without | |
8 | * modification, are permitted provided that the following conditions | |
9 | * are met: | |
10 | * | |
11 | * 1. Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * | |
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 | |
17 | * distribution. | |
18 | * | |
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/)" | |
23 | * | |
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. | |
28 | * | |
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. | |
32 | * | |
33 | * 6. Redistributions of any form whatsoever must retain the following | |
34 | * acknowledgment: | |
35 | * "This product includes software developed by the OpenSSL Project | |
36 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
37 | * | |
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 | * ==================================================================== | |
51 | * | |
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). | |
55 | * | |
56 | */ | |
57 | ||
58 | #include <stdio.h> | |
59 | #include "cryptlib.h" | |
60 | #include <openssl/x509.h> | |
61 | #include <openssl/asn1.h> | |
62 | #include <openssl/dh.h> | |
18e377b4 | 63 | #include "asn1_locl.h" |
adbc603d DSH |
64 | |
65 | static void int_dh_free(EVP_PKEY *pkey) | |
66 | { | |
67 | DH_free(pkey->pkey.dh); | |
68 | } | |
69 | ||
3e4585c8 DSH |
70 | static int dh_param_decode(EVP_PKEY *pkey, |
71 | const unsigned char **pder, int derlen) | |
72 | { | |
73 | DH *dh; | |
74 | if (!(dh = d2i_DHparams(NULL, pder, derlen))) | |
75 | { | |
76 | DHerr(DH_F_DH_PARAM_DECODE, ERR_R_DH_LIB); | |
77 | return 0; | |
78 | } | |
79 | EVP_PKEY_assign_DH(pkey, dh); | |
80 | return 1; | |
81 | } | |
82 | ||
83 | static int dh_param_encode(const EVP_PKEY *pkey, unsigned char **pder) | |
84 | { | |
85 | return i2d_DHparams(pkey->pkey.dh, pder); | |
86 | } | |
87 | ||
88 | static int do_dhparam_print(BIO *bp, const DH *x, int indent, | |
89 | ASN1_PCTX *ctx) | |
90 | { | |
91 | unsigned char *m=NULL; | |
92 | int reason=ERR_R_BUF_LIB,ret=0; | |
93 | size_t buf_len=0, i; | |
94 | ||
95 | if (x->p) | |
96 | buf_len = (size_t)BN_num_bytes(x->p); | |
97 | else | |
98 | { | |
99 | reason = ERR_R_PASSED_NULL_PARAMETER; | |
100 | goto err; | |
101 | } | |
102 | if (x->g) | |
103 | if (buf_len < (i = (size_t)BN_num_bytes(x->g))) | |
104 | buf_len = i; | |
105 | m=(unsigned char *)OPENSSL_malloc(buf_len+10); | |
106 | if (m == NULL) | |
107 | { | |
108 | reason=ERR_R_MALLOC_FAILURE; | |
109 | goto err; | |
110 | } | |
111 | ||
112 | BIO_indent(bp, indent, 128); | |
113 | if (BIO_printf(bp,"Diffie-Hellman-Parameters: (%d bit)\n", | |
114 | BN_num_bits(x->p)) <= 0) | |
115 | goto err; | |
116 | indent += 4; | |
117 | if (!ASN1_bn_print(bp,"prime:",x->p,m,indent)) goto err; | |
118 | if (!ASN1_bn_print(bp,"generator:",x->g,m,indent)) goto err; | |
119 | if (x->length != 0) | |
120 | { | |
121 | BIO_indent(bp, indent, 128); | |
122 | if (BIO_printf(bp,"recommended-private-length: %d bits\n", | |
123 | (int)x->length) <= 0) goto err; | |
124 | } | |
125 | ret=1; | |
126 | if (0) | |
127 | { | |
128 | err: | |
129 | DHerr(DH_F_DHPARAMS_PRINT,reason); | |
130 | } | |
131 | if (m != NULL) OPENSSL_free(m); | |
132 | return(ret); | |
133 | } | |
134 | ||
135 | static int dh_param_print(BIO *bp, const EVP_PKEY *pkey, int indent, | |
136 | ASN1_PCTX *ctx) | |
137 | { | |
138 | return do_dhparam_print(bp, pkey->pkey.dh, indent, ctx); | |
139 | } | |
140 | ||
141 | int DHparams_print(BIO *bp, const DH *x) | |
142 | { | |
143 | return do_dhparam_print(bp, x, 4, NULL); | |
144 | } | |
145 | ||
adbc603d DSH |
146 | const EVP_PKEY_ASN1_METHOD dh_asn1_meth = |
147 | { | |
148 | EVP_PKEY_DH, | |
149 | EVP_PKEY_DH, | |
150 | 0, | |
151 | ||
0b33dac3 | 152 | "DH", |
d82e2718 DSH |
153 | "OpenSSL PKCS#3 DH method", |
154 | ||
adbc603d DSH |
155 | 0, |
156 | 0, | |
157 | 0, | |
158 | 0, | |
159 | ||
160 | 0, | |
161 | 0, | |
162 | 0, | |
163 | ||
164 | 0, | |
165 | 0, | |
166 | ||
3e4585c8 DSH |
167 | dh_param_decode, |
168 | dh_param_encode, | |
169 | 0,0,0, | |
170 | dh_param_print, | |
adbc603d DSH |
171 | |
172 | int_dh_free, | |
173 | 0 | |
174 | }; | |
175 |