/* 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;}