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58964a49 RE |
1 | /* crypto/asn1/evp_asn1.c */ |
2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |
3 | * All rights reserved. | |
4 | * | |
5 | * This package is an SSL implementation written | |
6 | * by Eric Young (eay@cryptsoft.com). | |
7 | * The implementation was written so as to conform with Netscapes SSL. | |
ae5c8664 | 8 | * |
58964a49 RE |
9 | * This library is free for commercial and non-commercial use as long as |
10 | * the following conditions are aheared to. The following conditions | |
11 | * apply to all code found in this distribution, be it the RC4, RSA, | |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 | * included with this distribution is covered by the same copyright terms | |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
ae5c8664 | 15 | * |
58964a49 RE |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
17 | * the code are not to be removed. | |
18 | * If this package is used in a product, Eric Young should be given attribution | |
19 | * as the author of the parts of the library used. | |
20 | * This can be in the form of a textual message at program startup or | |
21 | * in documentation (online or textual) provided with the package. | |
ae5c8664 | 22 | * |
58964a49 RE |
23 | * Redistribution and use in source and binary forms, with or without |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 3. All advertising materials mentioning features or use of this software | |
32 | * must display the following acknowledgement: | |
33 | * "This product includes cryptographic software written by | |
34 | * Eric Young (eay@cryptsoft.com)" | |
35 | * The word 'cryptographic' can be left out if the rouines from the library | |
36 | * being used are not cryptographic related :-). | |
ae5c8664 | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
58964a49 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
ae5c8664 | 40 | * |
58964a49 RE |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 | * SUCH DAMAGE. | |
ae5c8664 | 52 | * |
58964a49 RE |
53 | * The licence and distribution terms for any publically available version or |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 | * copied and put under another distribution licence | |
56 | * [including the GNU Public Licence.] | |
57 | */ | |
58 | ||
59 | #include <stdio.h> | |
60 | #include "cryptlib.h" | |
ec577822 BM |
61 | #include <openssl/asn1.h> |
62 | #include <openssl/asn1_mac.h> | |
58964a49 | 63 | |
6343829a | 64 | int ASN1_TYPE_set_octetstring(ASN1_TYPE *a, unsigned char *data, int len) |
ae5c8664 MC |
65 | { |
66 | ASN1_STRING *os; | |
67 | ||
68 | if ((os = M_ASN1_OCTET_STRING_new()) == NULL) | |
69 | return (0); | |
70 | if (!M_ASN1_OCTET_STRING_set(os, data, len)) { | |
71 | M_ASN1_OCTET_STRING_free(os); | |
72 | return 0; | |
73 | } | |
74 | ASN1_TYPE_set(a, V_ASN1_OCTET_STRING, os); | |
75 | return (1); | |
76 | } | |
58964a49 | 77 | |
6b691a5c | 78 | /* int max_len: for returned value */ |
ae5c8664 MC |
79 | int ASN1_TYPE_get_octetstring(ASN1_TYPE *a, unsigned char *data, int max_len) |
80 | { | |
81 | int ret, num; | |
82 | unsigned char *p; | |
83 | ||
84 | if ((a->type != V_ASN1_OCTET_STRING) || (a->value.octet_string == NULL)) { | |
85 | ASN1err(ASN1_F_ASN1_TYPE_GET_OCTETSTRING, ASN1_R_DATA_IS_WRONG); | |
86 | return (-1); | |
87 | } | |
88 | p = M_ASN1_STRING_data(a->value.octet_string); | |
89 | ret = M_ASN1_STRING_length(a->value.octet_string); | |
90 | if (ret < max_len) | |
91 | num = ret; | |
92 | else | |
93 | num = max_len; | |
94 | memcpy(data, p, num); | |
95 | return (ret); | |
96 | } | |
58964a49 | 97 | |
6b691a5c | 98 | int ASN1_TYPE_set_int_octetstring(ASN1_TYPE *a, long num, unsigned char *data, |
ae5c8664 MC |
99 | int len) |
100 | { | |
101 | int n, size; | |
102 | ASN1_OCTET_STRING os, *osp; | |
103 | ASN1_INTEGER in; | |
104 | unsigned char *p; | |
105 | unsigned char buf[32]; /* when they have 256bit longs, I'll be in | |
106 | * trouble */ | |
107 | in.data = buf; | |
108 | in.length = 32; | |
109 | os.data = data; | |
110 | os.type = V_ASN1_OCTET_STRING; | |
111 | os.length = len; | |
112 | ASN1_INTEGER_set(&in, num); | |
113 | n = i2d_ASN1_INTEGER(&in, NULL); | |
114 | n += M_i2d_ASN1_OCTET_STRING(&os, NULL); | |
115 | ||
116 | size = ASN1_object_size(1, n, V_ASN1_SEQUENCE); | |
117 | ||
118 | if ((osp = ASN1_STRING_new()) == NULL) | |
119 | return (0); | |
120 | /* Grow the 'string' */ | |
121 | if (!ASN1_STRING_set(osp, NULL, size)) { | |
122 | ASN1_STRING_free(osp); | |
123 | return (0); | |
124 | } | |
125 | ||
126 | M_ASN1_STRING_length_set(osp, size); | |
127 | p = M_ASN1_STRING_data(osp); | |
128 | ||
129 | ASN1_put_object(&p, 1, n, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL); | |
130 | i2d_ASN1_INTEGER(&in, &p); | |
131 | M_i2d_ASN1_OCTET_STRING(&os, &p); | |
132 | ||
133 | ASN1_TYPE_set(a, V_ASN1_SEQUENCE, osp); | |
134 | return (1); | |
135 | } | |
136 | ||
137 | /* | |
138 | * we return the actual length..., num may be missing, in which case, set it | |
139 | * to zero | |
140 | */ | |
6b691a5c | 141 | /* int max_len: for returned value */ |
ae5c8664 MC |
142 | int ASN1_TYPE_get_int_octetstring(ASN1_TYPE *a, long *num, |
143 | unsigned char *data, int max_len) | |
144 | { | |
145 | int ret = -1, n; | |
146 | ASN1_INTEGER *ai = NULL; | |
147 | ASN1_OCTET_STRING *os = NULL; | |
148 | const unsigned char *p; | |
149 | long length; | |
150 | ASN1_const_CTX c; | |
151 | ||
152 | if ((a->type != V_ASN1_SEQUENCE) || (a->value.sequence == NULL)) { | |
153 | goto err; | |
154 | } | |
155 | p = M_ASN1_STRING_data(a->value.sequence); | |
156 | length = M_ASN1_STRING_length(a->value.sequence); | |
157 | ||
158 | c.pp = &p; | |
159 | c.p = p; | |
160 | c.max = p + length; | |
161 | c.error = ASN1_R_DATA_IS_WRONG; | |
162 | ||
163 | M_ASN1_D2I_start_sequence(); | |
164 | c.q = c.p; | |
165 | if ((ai = d2i_ASN1_INTEGER(NULL, &c.p, c.slen)) == NULL) | |
166 | goto err; | |
167 | c.slen -= (c.p - c.q); | |
168 | c.q = c.p; | |
169 | if ((os = d2i_ASN1_OCTET_STRING(NULL, &c.p, c.slen)) == NULL) | |
170 | goto err; | |
171 | c.slen -= (c.p - c.q); | |
172 | if (!M_ASN1_D2I_end_sequence()) | |
173 | goto err; | |
174 | ||
175 | if (num != NULL) | |
176 | *num = ASN1_INTEGER_get(ai); | |
177 | ||
178 | ret = M_ASN1_STRING_length(os); | |
179 | if (max_len > ret) | |
180 | n = ret; | |
181 | else | |
182 | n = max_len; | |
183 | ||
184 | if (data != NULL) | |
185 | memcpy(data, M_ASN1_STRING_data(os), n); | |
186 | if (0) { | |
187 | err: | |
188 | ASN1err(ASN1_F_ASN1_TYPE_GET_INT_OCTETSTRING, ASN1_R_DATA_IS_WRONG); | |
189 | } | |
190 | if (os != NULL) | |
191 | M_ASN1_OCTET_STRING_free(os); | |
192 | if (ai != NULL) | |
193 | M_ASN1_INTEGER_free(ai); | |
194 | return (ret); | |
195 | } |