Branch data Line data Source code
1 : : /* crypto/asn1/f_int.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/buffer.h>
62 : : #include <openssl/asn1.h>
63 : :
64 : 42 : int i2a_ASN1_INTEGER(BIO *bp, ASN1_INTEGER *a)
65 : : {
66 : 42 : int i,n=0;
67 : : static const char *h="0123456789ABCDEF";
68 : : char buf[2];
69 : :
70 [ + - ]: 42 : if (a == NULL) return(0);
71 : :
72 [ - + ]: 42 : if (a->type & V_ASN1_NEG)
73 : : {
74 [ # # ]: 0 : if (BIO_write(bp, "-", 1) != 1) goto err;
75 : : n = 1;
76 : : }
77 : :
78 [ + - ]: 42 : if (a->length == 0)
79 : : {
80 [ # # ]: 0 : if (BIO_write(bp,"00",2) != 2) goto err;
81 : 0 : n += 2;
82 : : }
83 : : else
84 : : {
85 [ + + ]: 133 : for (i=0; i<a->length; i++)
86 : : {
87 [ + + ][ - + ]: 91 : if ((i != 0) && (i%35 == 0))
88 : : {
89 [ # # ]: 0 : if (BIO_write(bp,"\\\n",2) != 2) goto err;
90 : 0 : n+=2;
91 : : }
92 : 91 : buf[0]=h[((unsigned char)a->data[i]>>4)&0x0f];
93 : 91 : buf[1]=h[((unsigned char)a->data[i] )&0x0f];
94 [ + - ]: 91 : if (BIO_write(bp,buf,2) != 2) goto err;
95 : 91 : n+=2;
96 : : }
97 : : }
98 : 42 : return(n);
99 : : err:
100 : : return(-1);
101 : : }
102 : :
103 : 4 : int a2i_ASN1_INTEGER(BIO *bp, ASN1_INTEGER *bs, char *buf, int size)
104 : : {
105 : 4 : int ret=0;
106 : : int i,j,k,m,n,again,bufsize;
107 : 4 : unsigned char *s=NULL,*sp;
108 : : unsigned char *bufp;
109 : 4 : int num=0,slen=0,first=1;
110 : :
111 : 4 : bs->type=V_ASN1_INTEGER;
112 : :
113 : 4 : bufsize=BIO_gets(bp,buf,size);
114 : : for (;;)
115 : : {
116 [ + - ]: 4 : if (bufsize < 1) goto err_sl;
117 : 4 : i=bufsize;
118 [ + - ]: 4 : if (buf[i-1] == '\n') buf[--i]='\0';
119 [ + - ]: 4 : if (i == 0) goto err_sl;
120 [ - + ]: 4 : if (buf[i-1] == '\r') buf[--i]='\0';
121 [ + - ]: 4 : if (i == 0) goto err_sl;
122 : 4 : again=(buf[i-1] == '\\');
123 : :
124 [ + + ]: 40 : for (j=0; j<i; j++)
125 : : {
126 : : #ifndef CHARSET_EBCDIC
127 [ + + ][ + - ]: 36 : if (!( ((buf[j] >= '0') && (buf[j] <= '9')) ||
128 : : ((buf[j] >= 'a') && (buf[j] <= 'f')) ||
129 : 10 : ((buf[j] >= 'A') && (buf[j] <= 'F'))))
130 : : #else
131 : : /* This #ifdef is not strictly necessary, since
132 : : * the characters A...F a...f 0...9 are contiguous
133 : : * (yes, even in EBCDIC - but not the whole alphabet).
134 : : * Nevertheless, isxdigit() is faster.
135 : : */
136 : : if (!isxdigit(buf[j]))
137 : : #endif
138 : : {
139 : : i=j;
140 : : break;
141 : : }
142 : : }
143 : 4 : buf[i]='\0';
144 : : /* We have now cleared all the crap off the end of the
145 : : * line */
146 [ + - ]: 4 : if (i < 2) goto err_sl;
147 : :
148 : 4 : bufp=(unsigned char *)buf;
149 [ + - ]: 4 : if (first)
150 : : {
151 : 4 : first=0;
152 [ + + ][ - + ]: 4 : if ((bufp[0] == '0') && (buf[1] == '0'))
153 : : {
154 : 0 : bufp+=2;
155 : 0 : i-=2;
156 : : }
157 : : }
158 : 4 : k=0;
159 : 4 : i-=again;
160 [ - + ]: 4 : if (i%2 != 0)
161 : : {
162 : 0 : ASN1err(ASN1_F_A2I_ASN1_INTEGER,ASN1_R_ODD_NUMBER_OF_CHARS);
163 : 0 : goto err;
164 : : }
165 : 4 : i/=2;
166 [ + - ]: 4 : if (num+i > slen)
167 : : {
168 [ + - ]: 4 : if (s == NULL)
169 : 4 : sp=(unsigned char *)OPENSSL_malloc(
170 : : (unsigned int)num+i*2);
171 : : else
172 : 0 : sp=OPENSSL_realloc_clean(s,slen,num+i*2);
173 [ - + ]: 4 : if (sp == NULL)
174 : : {
175 : 0 : ASN1err(ASN1_F_A2I_ASN1_INTEGER,ERR_R_MALLOC_FAILURE);
176 [ # # ]: 0 : if (s != NULL) OPENSSL_free(s);
177 : : goto err;
178 : : }
179 : 4 : s=sp;
180 : 4 : slen=num+i*2;
181 : : }
182 [ + + ]: 22 : for (j=0; j<i; j++,k+=2)
183 : : {
184 [ + + ]: 54 : for (n=0; n<2; n++)
185 : : {
186 : 36 : m=bufp[k+n];
187 [ + + ]: 36 : if ((m >= '0') && (m <= '9'))
188 : 26 : m-='0';
189 [ - + ]: 10 : else if ((m >= 'a') && (m <= 'f'))
190 : 0 : m=m-'a'+10;
191 [ + - ]: 10 : else if ((m >= 'A') && (m <= 'F'))
192 : 10 : m=m-'A'+10;
193 : : else
194 : : {
195 : 0 : ASN1err(ASN1_F_A2I_ASN1_INTEGER,ASN1_R_NON_HEX_CHARACTERS);
196 : 0 : goto err;
197 : : }
198 : 36 : s[num+j]<<=4;
199 : 36 : s[num+j]|=m;
200 : : }
201 : : }
202 : 4 : num+=i;
203 [ - + ]: 4 : if (again)
204 : 0 : bufsize=BIO_gets(bp,buf,size);
205 : : else
206 : : break;
207 : 0 : }
208 : 4 : bs->length=num;
209 : 4 : bs->data=s;
210 : 4 : ret=1;
211 : : err:
212 : : if (0)
213 : : {
214 : : err_sl:
215 : 0 : ASN1err(ASN1_F_A2I_ASN1_INTEGER,ASN1_R_SHORT_LINE);
216 : : }
217 : 4 : return(ret);
218 : : }
219 : :
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