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 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 if (a == NULL) 71 return (0); 72 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 } 95 96 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 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; 113 114 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] == '\\'); 124 125 for (j = i - 1; j > 0; j--) { 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 /* 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 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; 149 150 bufp = (unsigned char *)buf; 151 152 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 goto err; 170 } 171 s = sp; 172 slen = num + i * 2; 173 } 174 for (j = 0; j < i; j++, k += 2) { 175 for (n = 0; n < 2; n++) { 176 m = bufp[k + n]; 177 if ((m >= '0') && (m <= '9')) 178 m -= '0'; 179 else if ((m >= 'a') && (m <= 'f')) 180 m = m - 'a' + 10; 181 else if ((m >= 'A') && (m <= 'F')) 182 m = m - 'A' + 10; 183 else { 184 ASN1err(ASN1_F_A2I_ASN1_STRING, 185 ASN1_R_NON_HEX_CHARACTERS); 186 goto err; 187 } 188 s[num + j] <<= 4; 189 s[num + j] |= m; 190 } 191 } 192 num += i; 193 if (again) 194 bufsize = BIO_gets(bp, buf, size); 195 else 196 break; 197 } 198 bs->length = num; 199 bs->data = s; 200 ret = 1; 201 err: 202 if (0) { 203 err_sl: 204 ASN1err(ASN1_F_A2I_ASN1_STRING, ASN1_R_SHORT_LINE); 205 } 206 if (ret != 1) 207 OPENSSL_free(s); 208 return (ret); 209 } 210