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d02b48c6 | 1 | /* crypto/asn1/f_int.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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" | |
ec577822 BM |
61 | #include <openssl/buffer.h> |
62 | #include <openssl/x509.h> | |
d02b48c6 | 63 | |
6b691a5c | 64 | int i2a_ASN1_INTEGER(BIO *bp, ASN1_INTEGER *a) |
d02b48c6 RE |
65 | { |
66 | int i,n=0; | |
e778802f | 67 | static const char *h="0123456789ABCDEF"; |
d02b48c6 RE |
68 | char buf[2]; |
69 | ||
70 | if (a == NULL) return(0); | |
71 | ||
72 | if (a->length == 0) | |
73 | { | |
74 | if (BIO_write(bp,"00",2) != 2) goto err; | |
75 | n=2; | |
76 | } | |
77 | else | |
78 | { | |
79 | for (i=0; i<a->length; i++) | |
80 | { | |
81 | if ((i != 0) && (i%35 == 0)) | |
82 | { | |
83 | if (BIO_write(bp,"\\\n",2) != 2) goto err; | |
84 | n+=2; | |
85 | } | |
86 | buf[0]=h[((unsigned char)a->data[i]>>4)&0x0f]; | |
87 | buf[1]=h[((unsigned char)a->data[i] )&0x0f]; | |
88 | if (BIO_write(bp,buf,2) != 2) goto err; | |
89 | n+=2; | |
90 | } | |
91 | } | |
92 | return(n); | |
93 | err: | |
94 | return(-1); | |
95 | } | |
96 | ||
6b691a5c | 97 | int a2i_ASN1_INTEGER(BIO *bp, ASN1_INTEGER *bs, char *buf, int size) |
d02b48c6 RE |
98 | { |
99 | int ret=0; | |
100 | int i,j,k,m,n,again,bufsize; | |
101 | unsigned char *s=NULL,*sp; | |
102 | unsigned char *bufp; | |
103 | int num=0,slen=0,first=1; | |
104 | ||
105 | bs->type=V_ASN1_INTEGER; | |
106 | ||
107 | bufsize=BIO_gets(bp,buf,size); | |
108 | for (;;) | |
109 | { | |
110 | if (bufsize < 1) goto err_sl; | |
111 | i=bufsize; | |
112 | if (buf[i-1] == '\n') buf[--i]='\0'; | |
113 | if (i == 0) goto err_sl; | |
114 | if (buf[i-1] == '\r') buf[--i]='\0'; | |
115 | if (i == 0) goto err_sl; | |
116 | again=(buf[i-1] == '\\'); | |
117 | ||
118 | for (j=0; j<i; j++) | |
119 | { | |
a53955d8 | 120 | #ifndef CHARSET_EBCDIC |
d02b48c6 RE |
121 | if (!( ((buf[j] >= '0') && (buf[j] <= '9')) || |
122 | ((buf[j] >= 'a') && (buf[j] <= 'f')) || | |
123 | ((buf[j] >= 'A') && (buf[j] <= 'F')))) | |
a53955d8 UM |
124 | #else |
125 | /* This #ifdef is not strictly necessary, since | |
126 | * the characters A...F a...f 0...9 are contiguous | |
127 | * (yes, even in EBCDIC - but not the whole alphabet). | |
128 | * Nevertheless, isxdigit() is faster. | |
129 | */ | |
130 | if (!isxdigit(buf[j])) | |
131 | #endif | |
d02b48c6 RE |
132 | { |
133 | i=j; | |
134 | break; | |
135 | } | |
136 | } | |
137 | buf[i]='\0'; | |
138 | /* We have now cleared all the crap off the end of the | |
139 | * line */ | |
140 | if (i < 2) goto err_sl; | |
141 | ||
142 | bufp=(unsigned char *)buf; | |
143 | if (first) | |
144 | { | |
145 | first=0; | |
146 | if ((bufp[0] == '0') && (buf[1] == '0')) | |
147 | { | |
148 | bufp+=2; | |
149 | i-=2; | |
150 | } | |
151 | } | |
152 | k=0; | |
153 | i-=again; | |
154 | if (i%2 != 0) | |
155 | { | |
156 | ASN1err(ASN1_F_A2I_ASN1_INTEGER,ASN1_R_ODD_NUMBER_OF_CHARS); | |
157 | goto err; | |
158 | } | |
159 | i/=2; | |
160 | if (num+i > slen) | |
161 | { | |
162 | if (s == NULL) | |
163 | sp=(unsigned char *)Malloc( | |
164 | (unsigned int)num+i*2); | |
165 | else | |
166 | sp=(unsigned char *)Realloc(s, | |
167 | (unsigned int)num+i*2); | |
168 | if (sp == NULL) | |
169 | { | |
170 | ASN1err(ASN1_F_A2I_ASN1_INTEGER,ERR_R_MALLOC_FAILURE); | |
171 | if (s != NULL) Free((char *)s); | |
172 | goto err; | |
173 | } | |
174 | s=sp; | |
175 | slen=num+i*2; | |
176 | } | |
177 | for (j=0; j<i; j++,k+=2) | |
178 | { | |
179 | for (n=0; n<2; n++) | |
180 | { | |
181 | m=bufp[k+n]; | |
182 | if ((m >= '0') && (m <= '9')) | |
183 | m-='0'; | |
184 | else if ((m >= 'a') && (m <= 'f')) | |
185 | m=m-'a'+10; | |
186 | else if ((m >= 'A') && (m <= 'F')) | |
187 | m=m-'A'+10; | |
188 | else | |
189 | { | |
190 | ASN1err(ASN1_F_A2I_ASN1_INTEGER,ASN1_R_NON_HEX_CHARACTERS); | |
191 | goto err; | |
192 | } | |
193 | s[num+j]<<=4; | |
194 | s[num+j]|=m; | |
195 | } | |
196 | } | |
197 | num+=i; | |
198 | if (again) | |
199 | bufsize=BIO_gets(bp,buf,size); | |
200 | else | |
201 | break; | |
202 | } | |
203 | bs->length=num; | |
204 | bs->data=s; | |
205 | ret=1; | |
206 | err: | |
207 | if (0) | |
208 | { | |
209 | err_sl: | |
210 | ASN1err(ASN1_F_A2I_ASN1_INTEGER,ASN1_R_SHORT_LINE); | |
211 | } | |
212 | return(ret); | |
213 | } | |
214 |