a_utf8.c revision 59191
1/* crypto/asn1/a_utf8.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/asn1.h> 62 63ASN1_UTF8STRING *ASN1_UTF8STRING_new(void) 64{ return M_ASN1_UTF8STRING_new();} 65 66void ASN1_UTF8STRING_free(ASN1_UTF8STRING *x) 67{ M_ASN1_UTF8STRING_free(x);} 68 69int i2d_ASN1_UTF8STRING(ASN1_UTF8STRING *a, unsigned char **pp) 70 { 71 return(i2d_ASN1_bytes((ASN1_STRING *)a,pp, 72 V_ASN1_UTF8STRING,V_ASN1_UNIVERSAL)); 73 } 74 75ASN1_UTF8STRING *d2i_ASN1_UTF8STRING(ASN1_UTF8STRING **a, unsigned char **pp, 76 long length) 77 { 78 ASN1_UTF8STRING *ret=NULL; 79 80 ret=(ASN1_UTF8STRING *)d2i_ASN1_bytes((ASN1_STRING **)a, 81 pp,length,V_ASN1_UTF8STRING,V_ASN1_UNIVERSAL); 82 if (ret == NULL) 83 { 84 ASN1err(ASN1_F_D2I_ASN1_UTF8STRING,ERR_R_NESTED_ASN1_ERROR); 85 return(NULL); 86 } 87 return(ret); 88 } 89 90 91/* UTF8 utilities */ 92 93/* This parses a UTF8 string one character at a time. It is passed a pointer 94 * to the string and the length of the string. It sets 'value' to the value of 95 * the current character. It returns the number of characters read or a 96 * negative error code: 97 * -1 = string too short 98 * -2 = illegal character 99 * -3 = subsequent characters not of the form 10xxxxxx 100 * -4 = character encoded incorrectly (not minimal length). 101 */ 102 103int UTF8_getc(const unsigned char *str, int len, unsigned long *val) 104{ 105 const unsigned char *p; 106 unsigned long value; 107 int ret; 108 if(len <= 0) return 0; 109 p = str; 110 111 /* Check syntax and work out the encoded value (if correct) */ 112 if((*p & 0x80) == 0) { 113 value = *p++ & 0x7f; 114 ret = 1; 115 } else if((*p & 0xe0) == 0xc0) { 116 if(len < 2) return -1; 117 if((p[1] & 0xc0) != 0x80) return -3; 118 value = (*p++ & 0x1f) << 6; 119 value |= *p++ & 0x3f; 120 if(value < 0x80) return -4; 121 ret = 2; 122 } else if((*p & 0xf0) == 0xe0) { 123 if(len < 3) return -1; 124 if( ((p[1] & 0xc0) != 0x80) 125 || ((p[2] & 0xc0) != 0x80) ) return -3; 126 value = (*p++ & 0xf) << 12; 127 value |= (*p++ & 0x3f) << 6; 128 value |= *p++ & 0x3f; 129 if(value < 0x800) return -4; 130 ret = 3; 131 } else if((*p & 0xf8) == 0xf0) { 132 if(len < 4) return -1; 133 if( ((p[1] & 0xc0) != 0x80) 134 || ((p[2] & 0xc0) != 0x80) 135 || ((p[3] & 0xc0) != 0x80) ) return -3; 136 value = (*p++ & 0x7) << 18; 137 value |= (*p++ & 0x3f) << 12; 138 value |= (*p++ & 0x3f) << 6; 139 value |= *p++ & 0x3f; 140 if(value < 0x10000) return -4; 141 ret = 4; 142 } else if((*p & 0xfc) == 0xf8) { 143 if(len < 5) return -1; 144 if( ((p[1] & 0xc0) != 0x80) 145 || ((p[2] & 0xc0) != 0x80) 146 || ((p[3] & 0xc0) != 0x80) 147 || ((p[4] & 0xc0) != 0x80) ) return -3; 148 value = (*p++ & 0x3) << 24; 149 value |= (*p++ & 0x3f) << 18; 150 value |= (*p++ & 0x3f) << 12; 151 value |= (*p++ & 0x3f) << 6; 152 value |= *p++ & 0x3f; 153 if(value < 0x200000) return -4; 154 ret = 5; 155 } else if((*p & 0xfe) == 0xfc) { 156 if(len < 6) return -1; 157 if( ((p[1] & 0xc0) != 0x80) 158 || ((p[2] & 0xc0) != 0x80) 159 || ((p[3] & 0xc0) != 0x80) 160 || ((p[4] & 0xc0) != 0x80) 161 || ((p[5] & 0xc0) != 0x80) ) return -3; 162 value = (*p++ & 0x1) << 30; 163 value |= (*p++ & 0x3f) << 24; 164 value |= (*p++ & 0x3f) << 18; 165 value |= (*p++ & 0x3f) << 12; 166 value |= (*p++ & 0x3f) << 6; 167 value |= *p++ & 0x3f; 168 if(value < 0x4000000) return -4; 169 ret = 6; 170 } else return -2; 171 *val = value; 172 return ret; 173} 174 175/* This takes a character 'value' and writes the UTF8 encoded value in 176 * 'str' where 'str' is a buffer containing 'len' characters. Returns 177 * the number of characters written or -1 if 'len' is too small. 'str' can 178 * be set to NULL in which case it just returns the number of characters. 179 * It will need at most 6 characters. 180 */ 181 182int UTF8_putc(unsigned char *str, int len, unsigned long value) 183{ 184 if(!str) len = 6; /* Maximum we will need */ 185 else if(len <= 0) return -1; 186 if(value < 0x80) { 187 if(str) *str = (unsigned char)value; 188 return 1; 189 } 190 if(value < 0x800) { 191 if(len < 2) return -1; 192 if(str) { 193 *str++ = (unsigned char)(((value >> 6) & 0x1f) | 0xc0); 194 *str = (unsigned char)((value & 0x3f) | 0x80); 195 } 196 return 2; 197 } 198 if(value < 0x10000) { 199 if(len < 3) return -1; 200 if(str) { 201 *str++ = (unsigned char)(((value >> 12) & 0xf) | 0xe0); 202 *str++ = (unsigned char)(((value >> 6) & 0x3f) | 0x80); 203 *str = (unsigned char)((value & 0x3f) | 0x80); 204 } 205 return 3; 206 } 207 if(value < 0x200000) { 208 if(len < 4) return -1; 209 if(str) { 210 *str++ = (unsigned char)(((value >> 18) & 0x7) | 0xf0); 211 *str++ = (unsigned char)(((value >> 12) & 0x3f) | 0x80); 212 *str++ = (unsigned char)(((value >> 6) & 0x3f) | 0x80); 213 *str = (unsigned char)((value & 0x3f) | 0x80); 214 } 215 return 4; 216 } 217 if(value < 0x4000000) { 218 if(len < 5) return -1; 219 if(str) { 220 *str++ = (unsigned char)(((value >> 24) & 0x3) | 0xf8); 221 *str++ = (unsigned char)(((value >> 18) & 0x3f) | 0x80); 222 *str++ = (unsigned char)(((value >> 12) & 0x3f) | 0x80); 223 *str++ = (unsigned char)(((value >> 6) & 0x3f) | 0x80); 224 *str = (unsigned char)((value & 0x3f) | 0x80); 225 } 226 return 5; 227 } 228 if(len < 6) return -1; 229 if(str) { 230 *str++ = (unsigned char)(((value >> 30) & 0x1) | 0xfc); 231 *str++ = (unsigned char)(((value >> 24) & 0x3f) | 0x80); 232 *str++ = (unsigned char)(((value >> 18) & 0x3f) | 0x80); 233 *str++ = (unsigned char)(((value >> 12) & 0x3f) | 0x80); 234 *str++ = (unsigned char)(((value >> 6) & 0x3f) | 0x80); 235 *str = (unsigned char)((value & 0x3f) | 0x80); 236 } 237 return 6; 238} 239