| /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| * All rights reserved. |
| * |
| * This package is an SSL implementation written |
| * by Eric Young (eay@cryptsoft.com). |
| * The implementation was written so as to conform with Netscapes SSL. |
| * |
| * This library is free for commercial and non-commercial use as long as |
| * the following conditions are aheared to. The following conditions |
| * apply to all code found in this distribution, be it the RC4, RSA, |
| * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| * included with this distribution is covered by the same copyright terms |
| * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| * |
| * Copyright remains Eric Young's, and as such any Copyright notices in |
| * the code are not to be removed. |
| * If this package is used in a product, Eric Young should be given attribution |
| * as the author of the parts of the library used. |
| * This can be in the form of a textual message at program startup or |
| * in documentation (online or textual) provided with the package. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * "This product includes cryptographic software written by |
| * Eric Young (eay@cryptsoft.com)" |
| * The word 'cryptographic' can be left out if the rouines from the library |
| * being used are not cryptographic related :-). |
| * 4. If you include any Windows specific code (or a derivative thereof) from |
| * the apps directory (application code) you must include an acknowledgement: |
| * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * The licence and distribution terms for any publically available version or |
| * derivative of this code cannot be changed. i.e. this code cannot simply be |
| * copied and put under another distribution licence |
| * [including the GNU Public Licence.] */ |
| |
| #include <openssl/asn1.h> |
| |
| #include <openssl/err.h> |
| #include <openssl/mem.h> |
| |
| #include "internal.h" |
| |
| /* UTF8 utilities */ |
| |
| /* |
| * This parses a UTF8 string one character at a time. It is passed a pointer |
| * to the string and the length of the string. It sets 'value' to the value |
| * of the current character. It returns the number of characters read or a |
| * negative error code: -1 = string too short -2 = illegal character -3 = |
| * subsequent characters not of the form 10xxxxxx -4 = character encoded |
| * incorrectly (not minimal length). |
| */ |
| |
| int UTF8_getc(const unsigned char *str, int len, uint32_t *val) |
| { |
| const unsigned char *p; |
| uint32_t value; |
| int ret; |
| if (len <= 0) |
| return 0; |
| p = str; |
| |
| /* Check syntax and work out the encoded value (if correct) */ |
| if ((*p & 0x80) == 0) { |
| value = *p++ & 0x7f; |
| ret = 1; |
| } else if ((*p & 0xe0) == 0xc0) { |
| if (len < 2) |
| return -1; |
| if ((p[1] & 0xc0) != 0x80) |
| return -3; |
| value = (*p++ & 0x1f) << 6; |
| value |= *p++ & 0x3f; |
| if (value < 0x80) |
| return -4; |
| ret = 2; |
| } else if ((*p & 0xf0) == 0xe0) { |
| if (len < 3) |
| return -1; |
| if (((p[1] & 0xc0) != 0x80) |
| || ((p[2] & 0xc0) != 0x80)) |
| return -3; |
| value = (*p++ & 0xf) << 12; |
| value |= (*p++ & 0x3f) << 6; |
| value |= *p++ & 0x3f; |
| if (value < 0x800) |
| return -4; |
| ret = 3; |
| } else if ((*p & 0xf8) == 0xf0) { |
| if (len < 4) |
| return -1; |
| if (((p[1] & 0xc0) != 0x80) |
| || ((p[2] & 0xc0) != 0x80) |
| || ((p[3] & 0xc0) != 0x80)) |
| return -3; |
| value = ((uint32_t)(*p++ & 0x7)) << 18; |
| value |= (*p++ & 0x3f) << 12; |
| value |= (*p++ & 0x3f) << 6; |
| value |= *p++ & 0x3f; |
| if (value < 0x10000) |
| return -4; |
| ret = 4; |
| } else if ((*p & 0xfc) == 0xf8) { |
| if (len < 5) |
| return -1; |
| if (((p[1] & 0xc0) != 0x80) |
| || ((p[2] & 0xc0) != 0x80) |
| || ((p[3] & 0xc0) != 0x80) |
| || ((p[4] & 0xc0) != 0x80)) |
| return -3; |
| value = ((uint32_t)(*p++ & 0x3)) << 24; |
| value |= ((uint32_t)(*p++ & 0x3f)) << 18; |
| value |= ((uint32_t)(*p++ & 0x3f)) << 12; |
| value |= (*p++ & 0x3f) << 6; |
| value |= *p++ & 0x3f; |
| if (value < 0x200000) |
| return -4; |
| ret = 5; |
| } else if ((*p & 0xfe) == 0xfc) { |
| if (len < 6) |
| return -1; |
| if (((p[1] & 0xc0) != 0x80) |
| || ((p[2] & 0xc0) != 0x80) |
| || ((p[3] & 0xc0) != 0x80) |
| || ((p[4] & 0xc0) != 0x80) |
| || ((p[5] & 0xc0) != 0x80)) |
| return -3; |
| value = ((uint32_t)(*p++ & 0x1)) << 30; |
| value |= ((uint32_t)(*p++ & 0x3f)) << 24; |
| value |= ((uint32_t)(*p++ & 0x3f)) << 18; |
| value |= ((uint32_t)(*p++ & 0x3f)) << 12; |
| value |= (*p++ & 0x3f) << 6; |
| value |= *p++ & 0x3f; |
| if (value < 0x4000000) |
| return -4; |
| ret = 6; |
| } else |
| return -2; |
| *val = value; |
| return ret; |
| } |
| |
| /* |
| * This takes a character 'value' and writes the UTF8 encoded value in 'str' |
| * where 'str' is a buffer containing 'len' characters. Returns the number of |
| * characters written or -1 if 'len' is too small. 'str' can be set to NULL |
| * in which case it just returns the number of characters. It will need at |
| * most 6 characters. |
| */ |
| |
| int UTF8_putc(unsigned char *str, int len, uint32_t value) |
| { |
| if (!str) |
| len = 6; /* Maximum we will need */ |
| else if (len <= 0) |
| return -1; |
| if (value < 0x80) { |
| if (str) |
| *str = (unsigned char)value; |
| return 1; |
| } |
| if (value < 0x800) { |
| if (len < 2) |
| return -1; |
| if (str) { |
| *str++ = (unsigned char)(((value >> 6) & 0x1f) | 0xc0); |
| *str = (unsigned char)((value & 0x3f) | 0x80); |
| } |
| return 2; |
| } |
| if (value < 0x10000) { |
| if (len < 3) |
| return -1; |
| if (str) { |
| *str++ = (unsigned char)(((value >> 12) & 0xf) | 0xe0); |
| *str++ = (unsigned char)(((value >> 6) & 0x3f) | 0x80); |
| *str = (unsigned char)((value & 0x3f) | 0x80); |
| } |
| return 3; |
| } |
| if (value < 0x200000) { |
| if (len < 4) |
| return -1; |
| if (str) { |
| *str++ = (unsigned char)(((value >> 18) & 0x7) | 0xf0); |
| *str++ = (unsigned char)(((value >> 12) & 0x3f) | 0x80); |
| *str++ = (unsigned char)(((value >> 6) & 0x3f) | 0x80); |
| *str = (unsigned char)((value & 0x3f) | 0x80); |
| } |
| return 4; |
| } |
| if (value < 0x4000000) { |
| if (len < 5) |
| return -1; |
| if (str) { |
| *str++ = (unsigned char)(((value >> 24) & 0x3) | 0xf8); |
| *str++ = (unsigned char)(((value >> 18) & 0x3f) | 0x80); |
| *str++ = (unsigned char)(((value >> 12) & 0x3f) | 0x80); |
| *str++ = (unsigned char)(((value >> 6) & 0x3f) | 0x80); |
| *str = (unsigned char)((value & 0x3f) | 0x80); |
| } |
| return 5; |
| } |
| if (len < 6) |
| return -1; |
| if (str) { |
| *str++ = (unsigned char)(((value >> 30) & 0x1) | 0xfc); |
| *str++ = (unsigned char)(((value >> 24) & 0x3f) | 0x80); |
| *str++ = (unsigned char)(((value >> 18) & 0x3f) | 0x80); |
| *str++ = (unsigned char)(((value >> 12) & 0x3f) | 0x80); |
| *str++ = (unsigned char)(((value >> 6) & 0x3f) | 0x80); |
| *str = (unsigned char)((value & 0x3f) | 0x80); |
| } |
| return 6; |
| } |
