Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* a_mbstr.c */ |
| 2 | /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL |
| 3 | * project 1999. |
| 4 | */ |
| 5 | /* ==================================================================== |
| 6 | * Copyright (c) 1999 The OpenSSL Project. All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in |
| 17 | * the documentation and/or other materials provided with the |
| 18 | * distribution. |
| 19 | * |
| 20 | * 3. All advertising materials mentioning features or use of this |
| 21 | * software must display the following acknowledgment: |
| 22 | * "This product includes software developed by the OpenSSL Project |
| 23 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
| 24 | * |
| 25 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| 26 | * endorse or promote products derived from this software without |
| 27 | * prior written permission. For written permission, please contact |
| 28 | * licensing@OpenSSL.org. |
| 29 | * |
| 30 | * 5. Products derived from this software may not be called "OpenSSL" |
| 31 | * nor may "OpenSSL" appear in their names without prior written |
| 32 | * permission of the OpenSSL Project. |
| 33 | * |
| 34 | * 6. Redistributions of any form whatsoever must retain the following |
| 35 | * acknowledgment: |
| 36 | * "This product includes software developed by the OpenSSL Project |
| 37 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
| 38 | * |
| 39 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| 40 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 41 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 42 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| 43 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 45 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 46 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 48 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 49 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 50 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 51 | * ==================================================================== |
| 52 | * |
| 53 | * This product includes cryptographic software written by Eric Young |
| 54 | * (eay@cryptsoft.com). This product includes software written by Tim |
| 55 | * Hudson (tjh@cryptsoft.com). |
| 56 | * |
| 57 | */ |
| 58 | |
| 59 | #include <stdio.h> |
| 60 | #include <ctype.h> |
| 61 | #include "cryptlib.h" |
| 62 | #include <openssl/asn1.h> |
| 63 | |
| 64 | static int traverse_string(const unsigned char *p, int len, int inform, |
| 65 | int (*rfunc)(unsigned long value, void *in), void *arg); |
| 66 | static int in_utf8(unsigned long value, void *arg); |
| 67 | static int out_utf8(unsigned long value, void *arg); |
| 68 | static int type_str(unsigned long value, void *arg); |
| 69 | static int cpy_asc(unsigned long value, void *arg); |
| 70 | static int cpy_bmp(unsigned long value, void *arg); |
| 71 | static int cpy_univ(unsigned long value, void *arg); |
| 72 | static int cpy_utf8(unsigned long value, void *arg); |
| 73 | static int is_printable(unsigned long value); |
| 74 | |
| 75 | /* These functions take a string in UTF8, ASCII or multibyte form and |
| 76 | * a mask of permissible ASN1 string types. It then works out the minimal |
| 77 | * type (using the order Printable < IA5 < T61 < BMP < Universal < UTF8) |
| 78 | * and creates a string of the correct type with the supplied data. |
| 79 | * Yes this is horrible: it has to be :-( |
| 80 | * The 'ncopy' form checks minimum and maximum size limits too. |
| 81 | */ |
| 82 | |
| 83 | int ASN1_mbstring_copy(ASN1_STRING **out, const unsigned char *in, int len, |
| 84 | int inform, unsigned long mask) |
| 85 | { |
| 86 | return ASN1_mbstring_ncopy(out, in, len, inform, mask, 0, 0); |
| 87 | } |
| 88 | |
| 89 | int ASN1_mbstring_ncopy(ASN1_STRING **out, const unsigned char *in, int len, |
| 90 | int inform, unsigned long mask, |
| 91 | long minsize, long maxsize) |
| 92 | { |
| 93 | int str_type; |
| 94 | int ret; |
| 95 | char free_out; |
| 96 | int outform, outlen = 0; |
| 97 | ASN1_STRING *dest; |
| 98 | unsigned char *p; |
| 99 | int nchar; |
| 100 | char strbuf[32]; |
| 101 | int (*cpyfunc)(unsigned long,void *) = NULL; |
| 102 | if(len == -1) len = strlen((const char *)in); |
| 103 | if(!mask) mask = DIRSTRING_TYPE; |
| 104 | |
| 105 | /* First do a string check and work out the number of characters */ |
| 106 | switch(inform) { |
| 107 | |
| 108 | case MBSTRING_BMP: |
| 109 | if(len & 1) { |
| 110 | ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, |
| 111 | ASN1_R_INVALID_BMPSTRING_LENGTH); |
| 112 | return -1; |
| 113 | } |
| 114 | nchar = len >> 1; |
| 115 | break; |
| 116 | |
| 117 | case MBSTRING_UNIV: |
| 118 | if(len & 3) { |
| 119 | ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, |
| 120 | ASN1_R_INVALID_UNIVERSALSTRING_LENGTH); |
| 121 | return -1; |
| 122 | } |
| 123 | nchar = len >> 2; |
| 124 | break; |
| 125 | |
| 126 | case MBSTRING_UTF8: |
| 127 | nchar = 0; |
| 128 | /* This counts the characters and does utf8 syntax checking */ |
| 129 | ret = traverse_string(in, len, MBSTRING_UTF8, in_utf8, &nchar); |
| 130 | if(ret < 0) { |
| 131 | ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, |
| 132 | ASN1_R_INVALID_UTF8STRING); |
| 133 | return -1; |
| 134 | } |
| 135 | break; |
| 136 | |
| 137 | case MBSTRING_ASC: |
| 138 | nchar = len; |
| 139 | break; |
| 140 | |
| 141 | default: |
| 142 | ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ASN1_R_UNKNOWN_FORMAT); |
| 143 | return -1; |
| 144 | } |
| 145 | |
| 146 | if((minsize > 0) && (nchar < minsize)) { |
| 147 | ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ASN1_R_STRING_TOO_SHORT); |
| 148 | BIO_snprintf(strbuf, sizeof strbuf, "%ld", minsize); |
| 149 | ERR_add_error_data(2, "minsize=", strbuf); |
| 150 | return -1; |
| 151 | } |
| 152 | |
| 153 | if((maxsize > 0) && (nchar > maxsize)) { |
| 154 | ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ASN1_R_STRING_TOO_LONG); |
| 155 | BIO_snprintf(strbuf, sizeof strbuf, "%ld", maxsize); |
| 156 | ERR_add_error_data(2, "maxsize=", strbuf); |
| 157 | return -1; |
| 158 | } |
| 159 | |
| 160 | /* Now work out minimal type (if any) */ |
| 161 | if(traverse_string(in, len, inform, type_str, &mask) < 0) { |
| 162 | ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ASN1_R_ILLEGAL_CHARACTERS); |
| 163 | return -1; |
| 164 | } |
| 165 | |
| 166 | |
| 167 | /* Now work out output format and string type */ |
| 168 | outform = MBSTRING_ASC; |
| 169 | if(mask & B_ASN1_PRINTABLESTRING) str_type = V_ASN1_PRINTABLESTRING; |
| 170 | else if(mask & B_ASN1_IA5STRING) str_type = V_ASN1_IA5STRING; |
| 171 | else if(mask & B_ASN1_T61STRING) str_type = V_ASN1_T61STRING; |
| 172 | else if(mask & B_ASN1_BMPSTRING) { |
| 173 | str_type = V_ASN1_BMPSTRING; |
| 174 | outform = MBSTRING_BMP; |
| 175 | } else if(mask & B_ASN1_UNIVERSALSTRING) { |
| 176 | str_type = V_ASN1_UNIVERSALSTRING; |
| 177 | outform = MBSTRING_UNIV; |
| 178 | } else { |
| 179 | str_type = V_ASN1_UTF8STRING; |
| 180 | outform = MBSTRING_UTF8; |
| 181 | } |
| 182 | if(!out) return str_type; |
| 183 | if(*out) { |
| 184 | free_out = 0; |
| 185 | dest = *out; |
| 186 | if(dest->data) { |
| 187 | dest->length = 0; |
| 188 | OPENSSL_free(dest->data); |
| 189 | dest->data = NULL; |
| 190 | } |
| 191 | dest->type = str_type; |
| 192 | } else { |
| 193 | free_out = 1; |
| 194 | dest = ASN1_STRING_type_new(str_type); |
| 195 | if(!dest) { |
| 196 | ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, |
| 197 | ERR_R_MALLOC_FAILURE); |
| 198 | return -1; |
| 199 | } |
| 200 | *out = dest; |
| 201 | } |
| 202 | /* If both the same type just copy across */ |
| 203 | if(inform == outform) { |
| 204 | if(!ASN1_STRING_set(dest, in, len)) { |
| 205 | ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY,ERR_R_MALLOC_FAILURE); |
| 206 | return -1; |
| 207 | } |
| 208 | return str_type; |
| 209 | } |
| 210 | |
| 211 | /* Work out how much space the destination will need */ |
| 212 | switch(outform) { |
| 213 | case MBSTRING_ASC: |
| 214 | outlen = nchar; |
| 215 | cpyfunc = cpy_asc; |
| 216 | break; |
| 217 | |
| 218 | case MBSTRING_BMP: |
| 219 | outlen = nchar << 1; |
| 220 | cpyfunc = cpy_bmp; |
| 221 | break; |
| 222 | |
| 223 | case MBSTRING_UNIV: |
| 224 | outlen = nchar << 2; |
| 225 | cpyfunc = cpy_univ; |
| 226 | break; |
| 227 | |
| 228 | case MBSTRING_UTF8: |
| 229 | outlen = 0; |
| 230 | traverse_string(in, len, inform, out_utf8, &outlen); |
| 231 | cpyfunc = cpy_utf8; |
| 232 | break; |
| 233 | } |
| 234 | if(!(p = OPENSSL_malloc(outlen + 1))) { |
| 235 | if(free_out) ASN1_STRING_free(dest); |
| 236 | ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY,ERR_R_MALLOC_FAILURE); |
| 237 | return -1; |
| 238 | } |
| 239 | dest->length = outlen; |
| 240 | dest->data = p; |
| 241 | p[outlen] = 0; |
| 242 | traverse_string(in, len, inform, cpyfunc, &p); |
| 243 | return str_type; |
| 244 | } |
| 245 | |
| 246 | /* This function traverses a string and passes the value of each character |
| 247 | * to an optional function along with a void * argument. |
| 248 | */ |
| 249 | |
| 250 | static int traverse_string(const unsigned char *p, int len, int inform, |
| 251 | int (*rfunc)(unsigned long value, void *in), void *arg) |
| 252 | { |
| 253 | unsigned long value; |
| 254 | int ret; |
| 255 | while(len) { |
| 256 | if(inform == MBSTRING_ASC) { |
| 257 | value = *p++; |
| 258 | len--; |
| 259 | } else if(inform == MBSTRING_BMP) { |
| 260 | value = *p++ << 8; |
| 261 | value |= *p++; |
| 262 | len -= 2; |
| 263 | } else if(inform == MBSTRING_UNIV) { |
| 264 | value = ((unsigned long)*p++) << 24; |
| 265 | value |= ((unsigned long)*p++) << 16; |
| 266 | value |= *p++ << 8; |
| 267 | value |= *p++; |
| 268 | len -= 4; |
| 269 | } else { |
| 270 | ret = UTF8_getc(p, len, &value); |
| 271 | if(ret < 0) return -1; |
| 272 | len -= ret; |
| 273 | p += ret; |
| 274 | } |
| 275 | if(rfunc) { |
| 276 | ret = rfunc(value, arg); |
| 277 | if(ret <= 0) return ret; |
| 278 | } |
| 279 | } |
| 280 | return 1; |
| 281 | } |
| 282 | |
| 283 | /* Various utility functions for traverse_string */ |
| 284 | |
| 285 | /* Just count number of characters */ |
| 286 | |
| 287 | static int in_utf8(unsigned long value, void *arg) |
| 288 | { |
| 289 | int *nchar; |
| 290 | nchar = arg; |
| 291 | (*nchar)++; |
| 292 | return 1; |
| 293 | } |
| 294 | |
| 295 | /* Determine size of output as a UTF8 String */ |
| 296 | |
| 297 | static int out_utf8(unsigned long value, void *arg) |
| 298 | { |
| 299 | int *outlen; |
| 300 | outlen = arg; |
| 301 | *outlen += UTF8_putc(NULL, -1, value); |
| 302 | return 1; |
| 303 | } |
| 304 | |
| 305 | /* Determine the "type" of a string: check each character against a |
| 306 | * supplied "mask". |
| 307 | */ |
| 308 | |
| 309 | static int type_str(unsigned long value, void *arg) |
| 310 | { |
| 311 | unsigned long types; |
| 312 | types = *((unsigned long *)arg); |
| 313 | if((types & B_ASN1_PRINTABLESTRING) && !is_printable(value)) |
| 314 | types &= ~B_ASN1_PRINTABLESTRING; |
| 315 | if((types & B_ASN1_IA5STRING) && (value > 127)) |
| 316 | types &= ~B_ASN1_IA5STRING; |
| 317 | if((types & B_ASN1_T61STRING) && (value > 0xff)) |
| 318 | types &= ~B_ASN1_T61STRING; |
| 319 | if((types & B_ASN1_BMPSTRING) && (value > 0xffff)) |
| 320 | types &= ~B_ASN1_BMPSTRING; |
| 321 | if(!types) return -1; |
| 322 | *((unsigned long *)arg) = types; |
| 323 | return 1; |
| 324 | } |
| 325 | |
| 326 | /* Copy one byte per character ASCII like strings */ |
| 327 | |
| 328 | static int cpy_asc(unsigned long value, void *arg) |
| 329 | { |
| 330 | unsigned char **p, *q; |
| 331 | p = arg; |
| 332 | q = *p; |
| 333 | *q = (unsigned char) value; |
| 334 | (*p)++; |
| 335 | return 1; |
| 336 | } |
| 337 | |
| 338 | /* Copy two byte per character BMPStrings */ |
| 339 | |
| 340 | static int cpy_bmp(unsigned long value, void *arg) |
| 341 | { |
| 342 | unsigned char **p, *q; |
| 343 | p = arg; |
| 344 | q = *p; |
| 345 | *q++ = (unsigned char) ((value >> 8) & 0xff); |
| 346 | *q = (unsigned char) (value & 0xff); |
| 347 | *p += 2; |
| 348 | return 1; |
| 349 | } |
| 350 | |
| 351 | /* Copy four byte per character UniversalStrings */ |
| 352 | |
| 353 | static int cpy_univ(unsigned long value, void *arg) |
| 354 | { |
| 355 | unsigned char **p, *q; |
| 356 | p = arg; |
| 357 | q = *p; |
| 358 | *q++ = (unsigned char) ((value >> 24) & 0xff); |
| 359 | *q++ = (unsigned char) ((value >> 16) & 0xff); |
| 360 | *q++ = (unsigned char) ((value >> 8) & 0xff); |
| 361 | *q = (unsigned char) (value & 0xff); |
| 362 | *p += 4; |
| 363 | return 1; |
| 364 | } |
| 365 | |
| 366 | /* Copy to a UTF8String */ |
| 367 | |
| 368 | static int cpy_utf8(unsigned long value, void *arg) |
| 369 | { |
| 370 | unsigned char **p; |
| 371 | int ret; |
| 372 | p = arg; |
| 373 | /* We already know there is enough room so pass 0xff as the length */ |
| 374 | ret = UTF8_putc(*p, 0xff, value); |
| 375 | *p += ret; |
| 376 | return 1; |
| 377 | } |
| 378 | |
| 379 | /* Return 1 if the character is permitted in a PrintableString */ |
| 380 | static int is_printable(unsigned long value) |
| 381 | { |
| 382 | int ch; |
| 383 | if(value > 0x7f) return 0; |
| 384 | ch = (int) value; |
| 385 | /* Note: we can't use 'isalnum' because certain accented |
| 386 | * characters may count as alphanumeric in some environments. |
| 387 | */ |
| 388 | #ifndef CHARSET_EBCDIC |
| 389 | if((ch >= 'a') && (ch <= 'z')) return 1; |
| 390 | if((ch >= 'A') && (ch <= 'Z')) return 1; |
| 391 | if((ch >= '0') && (ch <= '9')) return 1; |
| 392 | if ((ch == ' ') || strchr("'()+,-./:=?", ch)) return 1; |
| 393 | #else /*CHARSET_EBCDIC*/ |
| 394 | if((ch >= os_toascii['a']) && (ch <= os_toascii['z'])) return 1; |
| 395 | if((ch >= os_toascii['A']) && (ch <= os_toascii['Z'])) return 1; |
| 396 | if((ch >= os_toascii['0']) && (ch <= os_toascii['9'])) return 1; |
| 397 | if ((ch == os_toascii[' ']) || strchr("'()+,-./:=?", os_toebcdic[ch])) return 1; |
| 398 | #endif /*CHARSET_EBCDIC*/ |
| 399 | return 0; |
| 400 | } |