1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
56
57 #include <openssl/asn1.h>
58
59 #include <openssl/err.h>
60 #include <openssl/mem.h>
61
62
i2a_ASN1_INTEGER(BIO * bp,ASN1_INTEGER * a)63 int i2a_ASN1_INTEGER(BIO *bp, ASN1_INTEGER *a)
64 {
65 int i,n=0;
66 static const char *h="0123456789ABCDEF";
67 char buf[2];
68
69 if (a == NULL) return(0);
70
71 if (a->type & V_ASN1_NEG)
72 {
73 if (BIO_write(bp, "-", 1) != 1) goto err;
74 n = 1;
75 }
76
77 if (a->length == 0)
78 {
79 if (BIO_write(bp,"00",2) != 2) goto err;
80 n += 2;
81 }
82 else
83 {
84 for (i=0; i<a->length; i++)
85 {
86 if ((i != 0) && (i%35 == 0))
87 {
88 if (BIO_write(bp,"\\\n",2) != 2) goto err;
89 n+=2;
90 }
91 buf[0]=h[((unsigned char)a->data[i]>>4)&0x0f];
92 buf[1]=h[((unsigned char)a->data[i] )&0x0f];
93 if (BIO_write(bp,buf,2) != 2) goto err;
94 n+=2;
95 }
96 }
97 return(n);
98 err:
99 return(-1);
100 }
101
a2i_ASN1_INTEGER(BIO * bp,ASN1_INTEGER * bs,char * buf,int size)102 int a2i_ASN1_INTEGER(BIO *bp, ASN1_INTEGER *bs, char *buf, int size)
103 {
104 int ret=0;
105 int i,j,k,m,n,again,bufsize;
106 unsigned char *s=NULL,*sp;
107 unsigned char *bufp;
108 int num=0,slen=0,first=1;
109
110 bs->type=V_ASN1_INTEGER;
111
112 bufsize=BIO_gets(bp,buf,size);
113 for (;;)
114 {
115 if (bufsize < 1) goto err_sl;
116 i=bufsize;
117 if (buf[i-1] == '\n') buf[--i]='\0';
118 if (i == 0) goto err_sl;
119 if (buf[i-1] == '\r') buf[--i]='\0';
120 if (i == 0) goto err_sl;
121 again=(buf[i-1] == '\\');
122
123 for (j=0; j<i; j++)
124 {
125 if (!( ((buf[j] >= '0') && (buf[j] <= '9')) ||
126 ((buf[j] >= 'a') && (buf[j] <= 'f')) ||
127 ((buf[j] >= 'A') && (buf[j] <= 'F'))))
128 {
129 i=j;
130 break;
131 }
132 }
133 buf[i]='\0';
134 /* We have now cleared all the crap off the end of the
135 * line */
136 if (i < 2) goto err_sl;
137
138 bufp=(unsigned char *)buf;
139 if (first)
140 {
141 first=0;
142 if ((bufp[0] == '0') && (buf[1] == '0'))
143 {
144 bufp+=2;
145 i-=2;
146 }
147 }
148 k=0;
149 i-=again;
150 if (i%2 != 0)
151 {
152 OPENSSL_PUT_ERROR(ASN1, ASN1_R_ODD_NUMBER_OF_CHARS);
153 goto err;
154 }
155 i/=2;
156 if (num+i > slen)
157 {
158 if (s == NULL)
159 sp=(unsigned char *)OPENSSL_malloc(
160 (unsigned int)num+i*2);
161 else
162 sp=OPENSSL_realloc_clean(s,slen,num+i*2);
163 if (sp == NULL)
164 {
165 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
166 goto err;
167 }
168 s=sp;
169 slen=num+i*2;
170 }
171 for (j=0; j<i; j++,k+=2)
172 {
173 for (n=0; n<2; n++)
174 {
175 m=bufp[k+n];
176 if ((m >= '0') && (m <= '9'))
177 m-='0';
178 else if ((m >= 'a') && (m <= 'f'))
179 m=m-'a'+10;
180 else if ((m >= 'A') && (m <= 'F'))
181 m=m-'A'+10;
182 else
183 {
184 OPENSSL_PUT_ERROR(ASN1, ASN1_R_NON_HEX_CHARACTERS);
185 goto err;
186 }
187 s[num+j]<<=4;
188 s[num+j]|=m;
189 }
190 }
191 num+=i;
192 if (again)
193 bufsize=BIO_gets(bp,buf,size);
194 else
195 break;
196 }
197 bs->length=num;
198 bs->data=s;
199 ret=1;
200 err:
201 if (0)
202 {
203 err_sl:
204 OPENSSL_PUT_ERROR(ASN1, ASN1_R_SHORT_LINE);
205 }
206 if (s != NULL)
207 OPENSSL_free(s);
208 return(ret);
209 }
210
211