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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 int i2a_ASN1_INTEGER(BIO *bp, ASN1_INTEGER *a) | |
65 { | |
66 int i,n=0; | |
67 static const char *h="0123456789ABCDEF"; | |
68 char buf[2]; | |
69 | |
70 if (a == NULL) return(0); | |
71 | |
72 if (a->type & V_ASN1_NEG) | |
73 { | |
74 if (BIO_write(bp, "-", 1) != 1) goto err; | |
75 n = 1; | |
76 } | |
77 | |
78 if (a->length == 0) | |
79 { | |
80 if (BIO_write(bp,"00",2) != 2) goto err; | |
81 n += 2; | |
82 } | |
83 else | |
84 { | |
85 for (i=0; i<a->length; i++) | |
86 { | |
87 if ((i != 0) && (i%35 == 0)) | |
88 { | |
89 if (BIO_write(bp,"\\\n",2) != 2) goto err; | |
90 n+=2; | |
91 } | |
92 buf[0]=h[((unsigned char)a->data[i]>>4)&0x0f]; | |
93 buf[1]=h[((unsigned char)a->data[i] )&0x0f]; | |
94 if (BIO_write(bp,buf,2) != 2) goto err; | |
95 n+=2; | |
96 } | |
97 } | |
98 return(n); | |
99 err: | |
100 return(-1); | |
101 } | |
102 | |
103 int a2i_ASN1_INTEGER(BIO *bp, ASN1_INTEGER *bs, char *buf, int size) | |
104 { | |
105 int ret=0; | |
106 int i,j,k,m,n,again,bufsize; | |
107 unsigned char *s=NULL,*sp; | |
108 unsigned char *bufp; | |
109 int num=0,slen=0,first=1; | |
110 | |
111 bs->type=V_ASN1_INTEGER; | |
112 | |
113 bufsize=BIO_gets(bp,buf,size); | |
114 for (;;) | |
115 { | |
116 if (bufsize < 1) goto err_sl; | |
117 i=bufsize; | |
118 if (buf[i-1] == '\n') buf[--i]='\0'; | |
119 if (i == 0) goto err_sl; | |
120 if (buf[i-1] == '\r') buf[--i]='\0'; | |
121 if (i == 0) goto err_sl; | |
122 again=(buf[i-1] == '\\'); | |
123 | |
124 for (j=0; j<i; j++) | |
125 { | |
126 #ifndef CHARSET_EBCDIC | |
127 if (!( ((buf[j] >= '0') && (buf[j] <= '9')) || | |
128 ((buf[j] >= 'a') && (buf[j] <= 'f')) || | |
129 ((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 buf[i]='\0'; | |
144 /* We have now cleared all the crap off the end of the | |
145 * line */ | |
146 if (i < 2) goto err_sl; | |
147 | |
148 bufp=(unsigned char *)buf; | |
149 if (first) | |
150 { | |
151 first=0; | |
152 if ((bufp[0] == '0') && (buf[1] == '0')) | |
153 { | |
154 bufp+=2; | |
155 i-=2; | |
156 } | |
157 } | |
158 k=0; | |
159 i-=again; | |
160 if (i%2 != 0) | |
161 { | |
162 ASN1err(ASN1_F_A2I_ASN1_INTEGER,ASN1_R_ODD_NUMBER_OF_CHA
RS); | |
163 goto err; | |
164 } | |
165 i/=2; | |
166 if (num+i > slen) | |
167 { | |
168 if (s == NULL) | |
169 sp=(unsigned char *)OPENSSL_malloc( | |
170 (unsigned int)num+i*2); | |
171 else | |
172 sp=OPENSSL_realloc_clean(s,slen,num+i*2); | |
173 if (sp == NULL) | |
174 { | |
175 ASN1err(ASN1_F_A2I_ASN1_INTEGER,ERR_R_MALLOC_FAI
LURE); | |
176 if (s != NULL) OPENSSL_free(s); | |
177 goto err; | |
178 } | |
179 s=sp; | |
180 slen=num+i*2; | |
181 } | |
182 for (j=0; j<i; j++,k+=2) | |
183 { | |
184 for (n=0; n<2; n++) | |
185 { | |
186 m=bufp[k+n]; | |
187 if ((m >= '0') && (m <= '9')) | |
188 m-='0'; | |
189 else if ((m >= 'a') && (m <= 'f')) | |
190 m=m-'a'+10; | |
191 else if ((m >= 'A') && (m <= 'F')) | |
192 m=m-'A'+10; | |
193 else | |
194 { | |
195 ASN1err(ASN1_F_A2I_ASN1_INTEGER,ASN1_R_N
ON_HEX_CHARACTERS); | |
196 goto err; | |
197 } | |
198 s[num+j]<<=4; | |
199 s[num+j]|=m; | |
200 } | |
201 } | |
202 num+=i; | |
203 if (again) | |
204 bufsize=BIO_gets(bp,buf,size); | |
205 else | |
206 break; | |
207 } | |
208 bs->length=num; | |
209 bs->data=s; | |
210 ret=1; | |
211 err: | |
212 if (0) | |
213 { | |
214 err_sl: | |
215 ASN1err(ASN1_F_A2I_ASN1_INTEGER,ASN1_R_SHORT_LINE); | |
216 } | |
217 return(ret); | |
218 } | |
219 | |
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