1/* crypto/asn1/f_enum.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/* Based on a_int.c: equivalent ENUMERATED functions */ 65 66int i2a_ASN1_ENUMERATED(BIO *bp, ASN1_ENUMERATED *a) 67{ 68 int i, n = 0; 69 static const char *h = "0123456789ABCDEF"; 70 char buf[2]; 71 72 if (a == NULL) 73 return (0); 74 75 if (a->length == 0) { 76 if (BIO_write(bp, "00", 2) != 2) 77 goto err; 78 n = 2; 79 } else { 80 for (i = 0; i < a->length; i++) { 81 if ((i != 0) && (i % 35 == 0)) { 82 if (BIO_write(bp, "\\\n", 2) != 2) 83 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) 89 goto err; 90 n += 2; 91 } 92 } 93 return (n); 94 err: 95 return (-1); 96} 97 98int a2i_ASN1_ENUMERATED(BIO *bp, ASN1_ENUMERATED *bs, char *buf, int size) 99{ 100 int ret = 0; 101 int i, j, k, m, n, again, bufsize; 102 unsigned char *s = NULL, *sp; 103 unsigned char *bufp; 104 int num = 0, slen = 0, first = 1; 105 106 bs->type = V_ASN1_ENUMERATED; 107 108 bufsize = BIO_gets(bp, buf, size); 109 for (;;) { 110 if (bufsize < 1) 111 goto err_sl; 112 i = bufsize; 113 if (buf[i - 1] == '\n') 114 buf[--i] = '\0'; 115 if (i == 0) 116 goto err_sl; 117 if (buf[i - 1] == '\r') 118 buf[--i] = '\0'; 119 if (i == 0) 120 goto err_sl; 121 again = (buf[i - 1] == '\\'); 122 123 for (j = 0; j < i; j++) { 124 if (!(((buf[j] >= '0') && (buf[j] <= '9')) || 125 ((buf[j] >= 'a') && (buf[j] <= 'f')) || 126 ((buf[j] >= 'A') && (buf[j] <= 'F')))) { 127 i = j; 128 break; 129 } 130 } 131 buf[i] = '\0'; 132 /* 133 * We have now cleared all the crap off the end of the line 134 */ 135 if (i < 2) 136 goto err_sl; 137 138 bufp = (unsigned char *)buf; 139 if (first) { 140 first = 0; 141 if ((bufp[0] == '0') && (buf[1] == '0')) { 142 bufp += 2; 143 i -= 2; 144 } 145 } 146 k = 0; 147 i -= again; 148 if (i % 2 != 0) { 149 ASN1err(ASN1_F_A2I_ASN1_ENUMERATED, ASN1_R_ODD_NUMBER_OF_CHARS); 150 goto err; 151 } 152 i /= 2; 153 if (num + i > slen) { 154 if (s == NULL) 155 sp = (unsigned char *)OPENSSL_malloc((unsigned int)num + 156 i * 2); 157 else 158 sp = (unsigned char *)OPENSSL_realloc(s, 159 (unsigned int)num + 160 i * 2); 161 if (sp == NULL) { 162 ASN1err(ASN1_F_A2I_ASN1_ENUMERATED, ERR_R_MALLOC_FAILURE); 163 if (s != NULL) 164 OPENSSL_free(s); 165 goto err; 166 } 167 s = sp; 168 slen = num + i * 2; 169 } 170 for (j = 0; j < i; j++, k += 2) { 171 for (n = 0; n < 2; n++) { 172 m = bufp[k + n]; 173 if ((m >= '0') && (m <= '9')) 174 m -= '0'; 175 else if ((m >= 'a') && (m <= 'f')) 176 m = m - 'a' + 10; 177 else if ((m >= 'A') && (m <= 'F')) 178 m = m - 'A' + 10; 179 else { 180 ASN1err(ASN1_F_A2I_ASN1_ENUMERATED, 181 ASN1_R_NON_HEX_CHARACTERS); 182 goto err; 183 } 184 s[num + j] <<= 4; 185 s[num + j] |= m; 186 } 187 } 188 num += i; 189 if (again) 190 bufsize = BIO_gets(bp, buf, size); 191 else 192 break; 193 } 194 bs->length = num; 195 bs->data = s; 196 ret = 1; 197 err: 198 if (0) { 199 err_sl: 200 ASN1err(ASN1_F_A2I_ASN1_ENUMERATED, ASN1_R_SHORT_LINE); 201 } 202 return (ret); 203} 204