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423 lines
13 KiB
423 lines
13 KiB
/* a_mbstr.c */ |
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/* |
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* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project |
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* 1999. |
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*/ |
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/* ==================================================================== |
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* Copyright (c) 1999 The OpenSSL Project. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. All advertising materials mentioning features or use of this |
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* software must display the following acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
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* |
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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* endorse or promote products derived from this software without |
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* prior written permission. For written permission, please contact |
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* licensing@OpenSSL.org. |
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* |
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* 5. Products derived from this software may not be called "OpenSSL" |
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* nor may "OpenSSL" appear in their names without prior written |
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* permission of the OpenSSL Project. |
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* |
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* 6. Redistributions of any form whatsoever must retain the following |
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* acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This product includes cryptographic software written by Eric Young |
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* (eay@cryptsoft.com). This product includes software written by Tim |
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* Hudson (tjh@cryptsoft.com). |
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* |
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*/ |
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#include <stdio.h> |
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#include <ctype.h> |
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#include "cryptlib.h" |
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#include <openssl/asn1.h> |
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static int traverse_string(const unsigned char *p, int len, int inform, |
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int (*rfunc) (unsigned long value, void *in), |
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void *arg); |
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static int in_utf8(unsigned long value, void *arg); |
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static int out_utf8(unsigned long value, void *arg); |
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static int type_str(unsigned long value, void *arg); |
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static int cpy_asc(unsigned long value, void *arg); |
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static int cpy_bmp(unsigned long value, void *arg); |
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static int cpy_univ(unsigned long value, void *arg); |
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static int cpy_utf8(unsigned long value, void *arg); |
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static int is_printable(unsigned long value); |
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|
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/* |
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* These functions take a string in UTF8, ASCII or multibyte form and a mask |
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* of permissible ASN1 string types. It then works out the minimal type |
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* (using the order Printable < IA5 < T61 < BMP < Universal < UTF8) and |
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* creates a string of the correct type with the supplied data. Yes this is |
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* horrible: it has to be :-( The 'ncopy' form checks minimum and maximum |
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* size limits too. |
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*/ |
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int ASN1_mbstring_copy(ASN1_STRING **out, const unsigned char *in, int len, |
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int inform, unsigned long mask) |
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{ |
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return ASN1_mbstring_ncopy(out, in, len, inform, mask, 0, 0); |
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} |
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int ASN1_mbstring_ncopy(ASN1_STRING **out, const unsigned char *in, int len, |
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int inform, unsigned long mask, |
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long minsize, long maxsize) |
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{ |
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int str_type; |
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int ret; |
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char free_out; |
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int outform, outlen = 0; |
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ASN1_STRING *dest; |
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unsigned char *p; |
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int nchar; |
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char strbuf[32]; |
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int (*cpyfunc) (unsigned long, void *) = NULL; |
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if (len == -1) |
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len = strlen((const char *)in); |
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if (!mask) |
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mask = DIRSTRING_TYPE; |
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|
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/* First do a string check and work out the number of characters */ |
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switch (inform) { |
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|
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case MBSTRING_BMP: |
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if (len & 1) { |
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ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, |
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ASN1_R_INVALID_BMPSTRING_LENGTH); |
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return -1; |
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} |
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nchar = len >> 1; |
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break; |
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case MBSTRING_UNIV: |
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if (len & 3) { |
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ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, |
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ASN1_R_INVALID_UNIVERSALSTRING_LENGTH); |
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return -1; |
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} |
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nchar = len >> 2; |
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break; |
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case MBSTRING_UTF8: |
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nchar = 0; |
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/* This counts the characters and does utf8 syntax checking */ |
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ret = traverse_string(in, len, MBSTRING_UTF8, in_utf8, &nchar); |
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if (ret < 0) { |
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ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ASN1_R_INVALID_UTF8STRING); |
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return -1; |
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} |
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break; |
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case MBSTRING_ASC: |
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nchar = len; |
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break; |
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default: |
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ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ASN1_R_UNKNOWN_FORMAT); |
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return -1; |
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} |
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if ((minsize > 0) && (nchar < minsize)) { |
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ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ASN1_R_STRING_TOO_SHORT); |
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BIO_snprintf(strbuf, sizeof strbuf, "%ld", minsize); |
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ERR_add_error_data(2, "minsize=", strbuf); |
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return -1; |
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} |
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if ((maxsize > 0) && (nchar > maxsize)) { |
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ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ASN1_R_STRING_TOO_LONG); |
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BIO_snprintf(strbuf, sizeof strbuf, "%ld", maxsize); |
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ERR_add_error_data(2, "maxsize=", strbuf); |
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return -1; |
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} |
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/* Now work out minimal type (if any) */ |
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if (traverse_string(in, len, inform, type_str, &mask) < 0) { |
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ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ASN1_R_ILLEGAL_CHARACTERS); |
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return -1; |
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} |
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/* Now work out output format and string type */ |
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outform = MBSTRING_ASC; |
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if (mask & B_ASN1_PRINTABLESTRING) |
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str_type = V_ASN1_PRINTABLESTRING; |
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else if (mask & B_ASN1_IA5STRING) |
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str_type = V_ASN1_IA5STRING; |
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else if (mask & B_ASN1_T61STRING) |
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str_type = V_ASN1_T61STRING; |
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else if (mask & B_ASN1_BMPSTRING) { |
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str_type = V_ASN1_BMPSTRING; |
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outform = MBSTRING_BMP; |
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} else if (mask & B_ASN1_UNIVERSALSTRING) { |
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str_type = V_ASN1_UNIVERSALSTRING; |
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outform = MBSTRING_UNIV; |
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} else { |
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str_type = V_ASN1_UTF8STRING; |
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outform = MBSTRING_UTF8; |
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} |
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if (!out) |
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return str_type; |
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if (*out) { |
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free_out = 0; |
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dest = *out; |
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if (dest->data) { |
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dest->length = 0; |
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OPENSSL_free(dest->data); |
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dest->data = NULL; |
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} |
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dest->type = str_type; |
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} else { |
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free_out = 1; |
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dest = ASN1_STRING_type_new(str_type); |
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if (!dest) { |
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ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ERR_R_MALLOC_FAILURE); |
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return -1; |
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} |
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*out = dest; |
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} |
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/* If both the same type just copy across */ |
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if (inform == outform) { |
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if (!ASN1_STRING_set(dest, in, len)) { |
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ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ERR_R_MALLOC_FAILURE); |
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return -1; |
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} |
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return str_type; |
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} |
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/* Work out how much space the destination will need */ |
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switch (outform) { |
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case MBSTRING_ASC: |
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outlen = nchar; |
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cpyfunc = cpy_asc; |
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break; |
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case MBSTRING_BMP: |
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outlen = nchar << 1; |
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cpyfunc = cpy_bmp; |
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break; |
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case MBSTRING_UNIV: |
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outlen = nchar << 2; |
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cpyfunc = cpy_univ; |
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break; |
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case MBSTRING_UTF8: |
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outlen = 0; |
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traverse_string(in, len, inform, out_utf8, &outlen); |
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cpyfunc = cpy_utf8; |
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break; |
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} |
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if (!(p = OPENSSL_malloc(outlen + 1))) { |
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if (free_out) |
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ASN1_STRING_free(dest); |
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ASN1err(ASN1_F_ASN1_MBSTRING_NCOPY, ERR_R_MALLOC_FAILURE); |
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return -1; |
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} |
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dest->length = outlen; |
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dest->data = p; |
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p[outlen] = 0; |
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traverse_string(in, len, inform, cpyfunc, &p); |
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return str_type; |
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} |
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/* |
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* This function traverses a string and passes the value of each character to |
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* an optional function along with a void * argument. |
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*/ |
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static int traverse_string(const unsigned char *p, int len, int inform, |
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int (*rfunc) (unsigned long value, void *in), |
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void *arg) |
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{ |
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unsigned long value; |
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int ret; |
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while (len) { |
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if (inform == MBSTRING_ASC) { |
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value = *p++; |
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len--; |
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} else if (inform == MBSTRING_BMP) { |
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value = *p++ << 8; |
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value |= *p++; |
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len -= 2; |
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} else if (inform == MBSTRING_UNIV) { |
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value = ((unsigned long)*p++) << 24; |
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value |= ((unsigned long)*p++) << 16; |
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value |= *p++ << 8; |
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value |= *p++; |
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len -= 4; |
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} else { |
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ret = UTF8_getc(p, len, &value); |
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if (ret < 0) |
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return -1; |
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len -= ret; |
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p += ret; |
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} |
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if (rfunc) { |
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ret = rfunc(value, arg); |
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if (ret <= 0) |
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return ret; |
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} |
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} |
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return 1; |
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} |
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/* Various utility functions for traverse_string */ |
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/* Just count number of characters */ |
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static int in_utf8(unsigned long value, void *arg) |
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{ |
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int *nchar; |
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nchar = arg; |
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(*nchar)++; |
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return 1; |
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} |
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/* Determine size of output as a UTF8 String */ |
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static int out_utf8(unsigned long value, void *arg) |
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{ |
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int *outlen; |
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outlen = arg; |
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*outlen += UTF8_putc(NULL, -1, value); |
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return 1; |
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} |
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/* |
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* Determine the "type" of a string: check each character against a supplied |
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* "mask". |
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*/ |
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static int type_str(unsigned long value, void *arg) |
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{ |
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unsigned long types; |
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types = *((unsigned long *)arg); |
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if ((types & B_ASN1_PRINTABLESTRING) && !is_printable(value)) |
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types &= ~B_ASN1_PRINTABLESTRING; |
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if ((types & B_ASN1_IA5STRING) && (value > 127)) |
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types &= ~B_ASN1_IA5STRING; |
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if ((types & B_ASN1_T61STRING) && (value > 0xff)) |
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types &= ~B_ASN1_T61STRING; |
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if ((types & B_ASN1_BMPSTRING) && (value > 0xffff)) |
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types &= ~B_ASN1_BMPSTRING; |
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if (!types) |
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return -1; |
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*((unsigned long *)arg) = types; |
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return 1; |
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} |
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/* Copy one byte per character ASCII like strings */ |
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static int cpy_asc(unsigned long value, void *arg) |
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{ |
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unsigned char **p, *q; |
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p = arg; |
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q = *p; |
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*q = (unsigned char)value; |
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(*p)++; |
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return 1; |
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} |
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/* Copy two byte per character BMPStrings */ |
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static int cpy_bmp(unsigned long value, void *arg) |
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{ |
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unsigned char **p, *q; |
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p = arg; |
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q = *p; |
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*q++ = (unsigned char)((value >> 8) & 0xff); |
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*q = (unsigned char)(value & 0xff); |
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*p += 2; |
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return 1; |
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} |
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/* Copy four byte per character UniversalStrings */ |
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static int cpy_univ(unsigned long value, void *arg) |
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{ |
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unsigned char **p, *q; |
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p = arg; |
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q = *p; |
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*q++ = (unsigned char)((value >> 24) & 0xff); |
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*q++ = (unsigned char)((value >> 16) & 0xff); |
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*q++ = (unsigned char)((value >> 8) & 0xff); |
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*q = (unsigned char)(value & 0xff); |
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*p += 4; |
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return 1; |
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} |
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/* Copy to a UTF8String */ |
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static int cpy_utf8(unsigned long value, void *arg) |
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{ |
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unsigned char **p; |
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int ret; |
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p = arg; |
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/* We already know there is enough room so pass 0xff as the length */ |
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ret = UTF8_putc(*p, 0xff, value); |
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*p += ret; |
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return 1; |
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} |
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/* Return 1 if the character is permitted in a PrintableString */ |
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static int is_printable(unsigned long value) |
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{ |
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int ch; |
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if (value > 0x7f) |
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return 0; |
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ch = (int)value; |
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/* |
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* Note: we can't use 'isalnum' because certain accented characters may |
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* count as alphanumeric in some environments. |
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*/ |
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#ifndef CHARSET_EBCDIC |
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if ((ch >= 'a') && (ch <= 'z')) |
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return 1; |
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if ((ch >= 'A') && (ch <= 'Z')) |
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return 1; |
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if ((ch >= '0') && (ch <= '9')) |
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return 1; |
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if ((ch == ' ') || strchr("'()+,-./:=?", ch)) |
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return 1; |
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#else /* CHARSET_EBCDIC */ |
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if ((ch >= os_toascii['a']) && (ch <= os_toascii['z'])) |
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return 1; |
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if ((ch >= os_toascii['A']) && (ch <= os_toascii['Z'])) |
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return 1; |
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if ((ch >= os_toascii['0']) && (ch <= os_toascii['9'])) |
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return 1; |
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if ((ch == os_toascii[' ']) || strchr("'()+,-./:=?", os_toebcdic[ch])) |
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return 1; |
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#endif /* CHARSET_EBCDIC */ |
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return 0; |
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}
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