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d02b48c6 | 1 | /* crypto/asn1/f_string.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. | |
0f113f3e | 8 | * |
d02b48c6 RE |
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). | |
0f113f3e | 15 | * |
d02b48c6 RE |
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. | |
0f113f3e | 22 | * |
d02b48c6 RE |
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 :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
d02b48c6 RE |
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. | |
0f113f3e | 52 | * |
d02b48c6 RE |
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 | 61 | #include <openssl/buffer.h> |
f66c3032 | 62 | #include <openssl/asn1.h> |
d02b48c6 | 63 | |
6b691a5c | 64 | int i2a_ASN1_STRING(BIO *bp, ASN1_STRING *a, int type) |
0f113f3e MC |
65 | { |
66 | int i, n = 0; | |
67 | static const char *h = "0123456789ABCDEF"; | |
68 | char buf[2]; | |
d02b48c6 | 69 | |
0f113f3e MC |
70 | if (a == NULL) |
71 | return (0); | |
d02b48c6 | 72 | |
0f113f3e MC |
73 | if (a->length == 0) { |
74 | if (BIO_write(bp, "0", 1) != 1) | |
75 | goto err; | |
76 | n = 1; | |
77 | } else { | |
78 | for (i = 0; i < a->length; i++) { | |
79 | if ((i != 0) && (i % 35 == 0)) { | |
80 | if (BIO_write(bp, "\\\n", 2) != 2) | |
81 | goto err; | |
82 | n += 2; | |
83 | } | |
84 | buf[0] = h[((unsigned char)a->data[i] >> 4) & 0x0f]; | |
85 | buf[1] = h[((unsigned char)a->data[i]) & 0x0f]; | |
86 | if (BIO_write(bp, buf, 2) != 2) | |
87 | goto err; | |
88 | n += 2; | |
89 | } | |
90 | } | |
91 | return (n); | |
92 | err: | |
93 | return (-1); | |
94 | } | |
d02b48c6 | 95 | |
6b691a5c | 96 | int a2i_ASN1_STRING(BIO *bp, ASN1_STRING *bs, char *buf, int size) |
0f113f3e MC |
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; | |
d02b48c6 | 103 | |
0f113f3e MC |
104 | bufsize = BIO_gets(bp, buf, size); |
105 | for (;;) { | |
106 | if (bufsize < 1) { | |
107 | if (first) | |
108 | break; | |
109 | else | |
110 | goto err_sl; | |
111 | } | |
112 | first = 0; | |
d02b48c6 | 113 | |
0f113f3e MC |
114 | i = bufsize; |
115 | if (buf[i - 1] == '\n') | |
116 | buf[--i] = '\0'; | |
117 | if (i == 0) | |
118 | goto err_sl; | |
119 | if (buf[i - 1] == '\r') | |
120 | buf[--i] = '\0'; | |
121 | if (i == 0) | |
122 | goto err_sl; | |
123 | again = (buf[i - 1] == '\\'); | |
d02b48c6 | 124 | |
0f113f3e | 125 | for (j = i - 1; j > 0; j--) { |
a53955d8 | 126 | #ifndef CHARSET_EBCDIC |
0f113f3e MC |
127 | if (!(((buf[j] >= '0') && (buf[j] <= '9')) || |
128 | ((buf[j] >= 'a') && (buf[j] <= 'f')) || | |
129 | ((buf[j] >= 'A') && (buf[j] <= 'F')))) | |
a53955d8 | 130 | #else |
0f113f3e MC |
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])) | |
a53955d8 | 137 | #endif |
0f113f3e MC |
138 | { |
139 | i = j; | |
140 | break; | |
141 | } | |
142 | } | |
143 | buf[i] = '\0'; | |
144 | /* | |
145 | * We have now cleared all the crap off the end of the line | |
146 | */ | |
147 | if (i < 2) | |
148 | goto err_sl; | |
d02b48c6 | 149 | |
0f113f3e | 150 | bufp = (unsigned char *)buf; |
d02b48c6 | 151 | |
0f113f3e MC |
152 | k = 0; |
153 | i -= again; | |
154 | if (i % 2 != 0) { | |
155 | ASN1err(ASN1_F_A2I_ASN1_STRING, ASN1_R_ODD_NUMBER_OF_CHARS); | |
156 | goto err; | |
157 | } | |
158 | i /= 2; | |
159 | if (num + i > slen) { | |
160 | if (s == NULL) | |
161 | sp = (unsigned char *)OPENSSL_malloc((unsigned int)num + | |
162 | i * 2); | |
163 | else | |
164 | sp = (unsigned char *)OPENSSL_realloc(s, | |
165 | (unsigned int)num + | |
166 | i * 2); | |
167 | if (sp == NULL) { | |
168 | ASN1err(ASN1_F_A2I_ASN1_STRING, ERR_R_MALLOC_FAILURE); | |
169 | if (s != NULL) | |
170 | OPENSSL_free(s); | |
171 | goto err; | |
172 | } | |
173 | s = sp; | |
174 | slen = num + i * 2; | |
175 | } | |
176 | for (j = 0; j < i; j++, k += 2) { | |
177 | for (n = 0; n < 2; n++) { | |
178 | m = bufp[k + n]; | |
179 | if ((m >= '0') && (m <= '9')) | |
180 | m -= '0'; | |
181 | else if ((m >= 'a') && (m <= 'f')) | |
182 | m = m - 'a' + 10; | |
183 | else if ((m >= 'A') && (m <= 'F')) | |
184 | m = m - 'A' + 10; | |
185 | else { | |
186 | ASN1err(ASN1_F_A2I_ASN1_STRING, | |
187 | ASN1_R_NON_HEX_CHARACTERS); | |
188 | goto err; | |
189 | } | |
190 | s[num + j] <<= 4; | |
191 | s[num + j] |= m; | |
192 | } | |
193 | } | |
194 | num += i; | |
195 | if (again) | |
196 | bufsize = BIO_gets(bp, buf, size); | |
197 | else | |
198 | break; | |
199 | } | |
200 | bs->length = num; | |
201 | bs->data = s; | |
202 | ret = 1; | |
203 | err: | |
204 | if (0) { | |
205 | err_sl: | |
206 | ASN1err(ASN1_F_A2I_ASN1_STRING, ASN1_R_SHORT_LINE); | |
207 | } | |
208 | return (ret); | |
209 | } |