Line data Source code
1 : /* crypto/asn1/f_string.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 0 : int i2a_ASN1_STRING(BIO *bp, ASN1_STRING *a, int type)
65 : {
66 : int i, n = 0;
67 : static const char *h = "0123456789ABCDEF";
68 : char buf[2];
69 :
70 0 : if (a == NULL)
71 : return (0);
72 :
73 0 : if (a->length == 0) {
74 0 : if (BIO_write(bp, "0", 1) != 1)
75 : goto err;
76 : n = 1;
77 : } else {
78 0 : for (i = 0; i < a->length; i++) {
79 0 : if ((i != 0) && (i % 35 == 0)) {
80 0 : if (BIO_write(bp, "\\\n", 2) != 2)
81 : goto err;
82 0 : n += 2;
83 : }
84 0 : buf[0] = h[((unsigned char)a->data[i] >> 4) & 0x0f];
85 0 : buf[1] = h[((unsigned char)a->data[i]) & 0x0f];
86 0 : if (BIO_write(bp, buf, 2) != 2)
87 : goto err;
88 0 : n += 2;
89 : }
90 : }
91 0 : return (n);
92 : err:
93 : return (-1);
94 : }
95 :
96 0 : int a2i_ASN1_STRING(BIO *bp, ASN1_STRING *bs, char *buf, int size)
97 : {
98 : int ret = 0;
99 : int i, j, k, m, n, again, bufsize;
100 : unsigned char *s = NULL, *sp;
101 : unsigned char *bufp;
102 : int num = 0, slen = 0, first = 1;
103 :
104 0 : bufsize = BIO_gets(bp, buf, size);
105 : for (;;) {
106 0 : if (bufsize < 1) {
107 0 : if (first)
108 : break;
109 : else
110 : goto err_sl;
111 : }
112 : first = 0;
113 :
114 : i = bufsize;
115 0 : if (buf[i - 1] == '\n')
116 0 : buf[--i] = '\0';
117 0 : if (i == 0)
118 : goto err_sl;
119 0 : if (buf[i - 1] == '\r')
120 0 : buf[--i] = '\0';
121 0 : if (i == 0)
122 : goto err_sl;
123 0 : again = (buf[i - 1] == '\\');
124 :
125 0 : for (j = i - 1; j > 0; j--) {
126 : #ifndef CHARSET_EBCDIC
127 0 : if (!(((buf[j] >= '0') && (buf[j] <= '9')) ||
128 : ((buf[j] >= 'a') && (buf[j] <= 'f')) ||
129 0 : ((buf[j] >= 'A') && (buf[j] <= 'F'))))
130 : #else
131 : /*
132 : * This #ifdef is not strictly necessary, since the characters
133 : * A...F a...f 0...9 are contiguous (yes, even in EBCDIC - but
134 : * not the whole alphabet). Nevertheless, isxdigit() is faster.
135 : */
136 : if (!isxdigit(buf[j]))
137 : #endif
138 : {
139 : i = j;
140 : break;
141 : }
142 : }
143 0 : buf[i] = '\0';
144 : /*
145 : * We have now cleared all the crap off the end of the line
146 : */
147 0 : if (i < 2)
148 : goto err_sl;
149 :
150 : bufp = (unsigned char *)buf;
151 :
152 : k = 0;
153 0 : i -= again;
154 0 : if (i % 2 != 0) {
155 0 : ASN1err(ASN1_F_A2I_ASN1_STRING, ASN1_R_ODD_NUMBER_OF_CHARS);
156 0 : goto err;
157 : }
158 0 : i /= 2;
159 0 : if (num + i > slen) {
160 0 : if (s == NULL)
161 0 : sp = (unsigned char *)OPENSSL_malloc((unsigned int)num +
162 : i * 2);
163 : else
164 0 : sp = (unsigned char *)OPENSSL_realloc(s,
165 : (unsigned int)num +
166 : i * 2);
167 0 : if (sp == NULL) {
168 0 : ASN1err(ASN1_F_A2I_ASN1_STRING, ERR_R_MALLOC_FAILURE);
169 0 : if (s != NULL)
170 0 : OPENSSL_free(s);
171 : goto err;
172 : }
173 : s = sp;
174 0 : slen = num + i * 2;
175 : }
176 0 : for (j = 0; j < i; j++, k += 2) {
177 0 : for (n = 0; n < 2; n++) {
178 0 : m = bufp[k + n];
179 0 : if ((m >= '0') && (m <= '9'))
180 0 : m -= '0';
181 0 : else if ((m >= 'a') && (m <= 'f'))
182 0 : m = m - 'a' + 10;
183 0 : else if ((m >= 'A') && (m <= 'F'))
184 0 : m = m - 'A' + 10;
185 : else {
186 0 : ASN1err(ASN1_F_A2I_ASN1_STRING,
187 : ASN1_R_NON_HEX_CHARACTERS);
188 0 : goto err;
189 : }
190 0 : s[num + j] <<= 4;
191 0 : s[num + j] |= m;
192 : }
193 : }
194 : num += i;
195 0 : if (again)
196 0 : bufsize = BIO_gets(bp, buf, size);
197 : else
198 : break;
199 0 : }
200 0 : bs->length = num;
201 0 : bs->data = s;
202 : ret = 1;
203 : err:
204 : if (0) {
205 : err_sl:
206 0 : ASN1err(ASN1_F_A2I_ASN1_STRING, ASN1_R_SHORT_LINE);
207 : }
208 0 : return (ret);
209 : }
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