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diff --git a/src/lib/libcrypto/asn1/a_bitstr.c b/src/lib/libcrypto/asn1/a_bitstr.c
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1/* crypto/asn1/a_bitstr.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 <openssl/asn1.h>
62
63int ASN1_BIT_STRING_set(ASN1_BIT_STRING *x, unsigned char *d, int len)
64{ return M_ASN1_BIT_STRING_set(x, d, len); }
65
66int i2c_ASN1_BIT_STRING(ASN1_BIT_STRING *a, unsigned char **pp)
67 {
68 int ret,j,bits,len;
69 unsigned char *p,*d;
70
71 if (a == NULL) return(0);
72
73 len=a->length;
74
75 if (len > 0)
76 {
77 if (a->flags & ASN1_STRING_FLAG_BITS_LEFT)
78 {
79 bits=(int)a->flags&0x07;
80 }
81 else
82 {
83 for ( ; len > 0; len--)
84 {
85 if (a->data[len-1]) break;
86 }
87 j=a->data[len-1];
88 if (j & 0x01) bits=0;
89 else if (j & 0x02) bits=1;
90 else if (j & 0x04) bits=2;
91 else if (j & 0x08) bits=3;
92 else if (j & 0x10) bits=4;
93 else if (j & 0x20) bits=5;
94 else if (j & 0x40) bits=6;
95 else if (j & 0x80) bits=7;
96 else bits=0; /* should not happen */
97 }
98 }
99 else
100 bits=0;
101
102 ret=1+len;
103 if (pp == NULL) return(ret);
104
105 p= *pp;
106
107 *(p++)=(unsigned char)bits;
108 d=a->data;
109 memcpy(p,d,len);
110 p+=len;
111 if (len > 0) p[-1]&=(0xff<<bits);
112 *pp=p;
113 return(ret);
114 }
115
116ASN1_BIT_STRING *c2i_ASN1_BIT_STRING(ASN1_BIT_STRING **a, unsigned char **pp,
117 long len)
118 {
119 ASN1_BIT_STRING *ret=NULL;
120 unsigned char *p,*s;
121 int i;
122
123 if (len < 1)
124 {
125 i=ASN1_R_STRING_TOO_SHORT;
126 goto err;
127 }
128
129 if ((a == NULL) || ((*a) == NULL))
130 {
131 if ((ret=M_ASN1_BIT_STRING_new()) == NULL) return(NULL);
132 }
133 else
134 ret=(*a);
135
136 p= *pp;
137 i= *(p++);
138 /* We do this to preserve the settings. If we modify
139 * the settings, via the _set_bit function, we will recalculate
140 * on output */
141 ret->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); /* clear */
142 ret->flags|=(ASN1_STRING_FLAG_BITS_LEFT|(i&0x07)); /* set */
143
144 if (len-- > 1) /* using one because of the bits left byte */
145 {
146 s=(unsigned char *)OPENSSL_malloc((int)len);
147 if (s == NULL)
148 {
149 i=ERR_R_MALLOC_FAILURE;
150 goto err;
151 }
152 memcpy(s,p,(int)len);
153 s[len-1]&=(0xff<<i);
154 p+=len;
155 }
156 else
157 s=NULL;
158
159 ret->length=(int)len;
160 if (ret->data != NULL) OPENSSL_free(ret->data);
161 ret->data=s;
162 ret->type=V_ASN1_BIT_STRING;
163 if (a != NULL) (*a)=ret;
164 *pp=p;
165 return(ret);
166err:
167 ASN1err(ASN1_F_D2I_ASN1_BIT_STRING,i);
168 if ((ret != NULL) && ((a == NULL) || (*a != ret)))
169 M_ASN1_BIT_STRING_free(ret);
170 return(NULL);
171 }
172
173/* These next 2 functions from Goetz Babin-Ebell <babinebell@trustcenter.de>
174 */
175int ASN1_BIT_STRING_set_bit(ASN1_BIT_STRING *a, int n, int value)
176 {
177 int w,v,iv;
178 unsigned char *c;
179
180 w=n/8;
181 v=1<<(7-(n&0x07));
182 iv= ~v;
183 if (!value) v=0;
184
185 a->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); /* clear, set on write */
186
187 if (a == NULL) return(0);
188 if ((a->length < (w+1)) || (a->data == NULL))
189 {
190 if (!value) return(1); /* Don't need to set */
191 if (a->data == NULL)
192 c=(unsigned char *)OPENSSL_malloc(w+1);
193 else
194 c=(unsigned char *)OPENSSL_realloc_clean(a->data,
195 a->length,
196 w+1);
197 if (c == NULL)
198 {
199 ASN1err(ASN1_F_ASN1_BIT_STRING_SET_BIT,ERR_R_MALLOC_FAILURE);
200 return 0;
201 }
202 if (w+1-a->length > 0) memset(c+a->length, 0, w+1-a->length);
203 a->data=c;
204 a->length=w+1;
205 }
206 a->data[w]=((a->data[w])&iv)|v;
207 while ((a->length > 0) && (a->data[a->length-1] == 0))
208 a->length--;
209 return(1);
210 }
211
212int ASN1_BIT_STRING_get_bit(ASN1_BIT_STRING *a, int n)
213 {
214 int w,v;
215
216 w=n/8;
217 v=1<<(7-(n&0x07));
218 if ((a == NULL) || (a->length < (w+1)) || (a->data == NULL))
219 return(0);
220 return((a->data[w]&v) != 0);
221 }
222
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