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Diffstat (limited to 'openssl/crypto/asn1/a_utf8.c')
| -rw-r--r-- | openssl/crypto/asn1/a_utf8.c | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/openssl/crypto/asn1/a_utf8.c b/openssl/crypto/asn1/a_utf8.c new file mode 100644 index 00000000..508e11e5 --- /dev/null +++ b/openssl/crypto/asn1/a_utf8.c @@ -0,0 +1,211 @@ +/* crypto/asn1/a_utf8.c */ +/* 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 <stdio.h> +#include "cryptlib.h" +#include <openssl/asn1.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, unsigned long *val) +{ + const unsigned char *p; + unsigned long 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 = ((unsigned long)(*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 = ((unsigned long)(*p++ & 0x3)) << 24; + value |= ((unsigned long)(*p++ & 0x3f)) << 18; + value |= ((unsigned long)(*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 = ((unsigned long)(*p++ & 0x1)) << 30; + value |= ((unsigned long)(*p++ & 0x3f)) << 24; + value |= ((unsigned long)(*p++ & 0x3f)) << 18; + value |= ((unsigned long)(*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, unsigned long 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; +} |