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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. | |
8 | * | |
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). | |
15 | * | |
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. | |
22 | * | |
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 :-). | |
37 | * 4. If you include any Windows specific code (or a derivative thereof) from | |
38 | * the apps directory (application code) you must include an acknowledgement: | |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40 | * | |
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. | |
52 | * | |
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" | |
61 | #include "asn1.h" | |
62 | #include "asn1_mac.h" | |
63 | ||
6b691a5c | 64 | int ASN1_TYPE_set_octetstring(ASN1_TYPE *a, unsigned char *data, int len) |
58964a49 RE |
65 | { |
66 | ASN1_STRING *os; | |
67 | ||
68 | if ((os=ASN1_OCTET_STRING_new()) == NULL) return(0); | |
69 | if (!ASN1_OCTET_STRING_set(os,data,len)) return(0); | |
70 | ASN1_TYPE_set(a,V_ASN1_OCTET_STRING,(char *)os); | |
71 | return(1); | |
72 | } | |
73 | ||
6b691a5c UM |
74 | /* int max_len: for returned value */ |
75 | int ASN1_TYPE_get_octetstring(ASN1_TYPE *a, unsigned char *data, | |
76 | int max_len) | |
58964a49 RE |
77 | { |
78 | int ret,num; | |
79 | unsigned char *p; | |
80 | ||
81 | if ((a->type != V_ASN1_OCTET_STRING) || (a->value.octet_string == NULL)) | |
82 | { | |
83 | ASN1err(ASN1_F_ASN1_TYPE_GET_OCTETSTRING,ASN1_R_DATA_IS_WRONG); | |
84 | return(-1); | |
85 | } | |
86 | p=ASN1_STRING_data(a->value.octet_string); | |
87 | ret=ASN1_STRING_length(a->value.octet_string); | |
88 | if (ret < max_len) | |
89 | num=ret; | |
90 | else | |
91 | num=max_len; | |
92 | memcpy(data,p,num); | |
93 | return(ret); | |
94 | } | |
95 | ||
6b691a5c UM |
96 | int ASN1_TYPE_set_int_octetstring(ASN1_TYPE *a, long num, unsigned char *data, |
97 | int len) | |
58964a49 RE |
98 | { |
99 | int n,size; | |
100 | ASN1_OCTET_STRING os,*osp; | |
101 | ASN1_INTEGER in; | |
102 | unsigned char *p; | |
103 | unsigned char buf[32]; /* when they have 256bit longs, | |
104 | * I'll be in trouble */ | |
105 | in.data=buf; | |
106 | in.length=32; | |
107 | os.data=data; | |
108 | os.type=V_ASN1_OCTET_STRING; | |
109 | os.length=len; | |
110 | ASN1_INTEGER_set(&in,num); | |
111 | n = i2d_ASN1_INTEGER(&in,NULL); | |
112 | n+=M_i2d_ASN1_OCTET_STRING(&os,NULL); | |
113 | ||
114 | size=ASN1_object_size(1,n,V_ASN1_SEQUENCE); | |
115 | ||
116 | if ((osp=ASN1_STRING_new()) == NULL) return(0); | |
117 | /* Grow the 'string' */ | |
118 | ASN1_STRING_set(osp,NULL,size); | |
119 | ||
120 | ASN1_STRING_length(osp)=size; | |
121 | p=ASN1_STRING_data(osp); | |
122 | ||
123 | ASN1_put_object(&p,1,n,V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL); | |
124 | i2d_ASN1_INTEGER(&in,&p); | |
125 | M_i2d_ASN1_OCTET_STRING(&os,&p); | |
126 | ||
127 | ASN1_TYPE_set(a,V_ASN1_SEQUENCE,(char *)osp); | |
128 | return(1); | |
129 | } | |
130 | ||
dfeab068 RE |
131 | /* we return the actual length..., num may be missing, in which |
132 | * case, set it to zero */ | |
6b691a5c UM |
133 | /* int max_len: for returned value */ |
134 | int ASN1_TYPE_get_int_octetstring(ASN1_TYPE *a, long *num, unsigned char *data, | |
135 | int max_len) | |
58964a49 RE |
136 | { |
137 | int ret= -1,n; | |
138 | ASN1_INTEGER *ai=NULL; | |
139 | ASN1_OCTET_STRING *os=NULL; | |
140 | unsigned char *p; | |
141 | long length; | |
142 | ASN1_CTX c; | |
143 | ||
144 | if ((a->type != V_ASN1_SEQUENCE) || (a->value.sequence == NULL)) | |
145 | { | |
146 | goto err; | |
147 | } | |
148 | p=ASN1_STRING_data(a->value.sequence); | |
149 | length=ASN1_STRING_length(a->value.sequence); | |
150 | ||
151 | c.pp= &p; | |
152 | c.p=p; | |
153 | c.max=p+length; | |
154 | c.error=ASN1_R_DATA_IS_WRONG; | |
155 | ||
156 | M_ASN1_D2I_start_sequence(); | |
157 | c.q=c.p; | |
158 | if ((ai=d2i_ASN1_INTEGER(NULL,&c.p,c.slen)) == NULL) goto err; | |
159 | c.slen-=(c.p-c.q); | |
160 | c.q=c.p; | |
161 | if ((os=d2i_ASN1_OCTET_STRING(NULL,&c.p,c.slen)) == NULL) goto err; | |
162 | c.slen-=(c.p-c.q); | |
163 | if (!M_ASN1_D2I_end_sequence()) goto err; | |
164 | ||
165 | if (num != NULL) | |
166 | *num=ASN1_INTEGER_get(ai); | |
167 | ||
168 | ret=ASN1_STRING_length(os); | |
169 | if (max_len > ret) | |
170 | n=ret; | |
171 | else | |
172 | n=max_len; | |
173 | ||
174 | if (data != NULL) | |
175 | memcpy(data,ASN1_STRING_data(os),n); | |
176 | if (0) | |
177 | { | |
178 | err: | |
179 | ASN1err(ASN1_F_ASN1_TYPE_GET_INT_OCTETSTRING,ASN1_R_DATA_IS_WRONG); | |
180 | } | |
181 | if (os != NULL) ASN1_OCTET_STRING_free(os); | |
182 | if (ai != NULL) ASN1_INTEGER_free(ai); | |
183 | return(ret); | |
184 | } | |
185 |