crypto/asn1/a_mbstr.c - third_party/openssl - Git at Google

 /*
  * Copyright 1999-2021 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the Apache License 2.0 (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
  * in the file LICENSE in the source distribution or at
  * https://www.openssl.org/source/license.html
  */

 #include <stdio.h>
 #include "crypto/ctype.h"
 #include "internal/cryptlib.h"
 #include "internal/unicode.h"
 #include <openssl/asn1.h>

 static int traverse_string(const unsigned char *p, int len, int inform,
                            int (*rfunc) (unsigned long value, void *in),
                            void *arg);
 static int in_utf8(unsigned long value, void *arg);
 static int out_utf8(unsigned long value, void *arg);
 static int type_str(unsigned long value, void *arg);
 static int cpy_asc(unsigned long value, void *arg);
 static int cpy_bmp(unsigned long value, void *arg);
 static int cpy_univ(unsigned long value, void *arg);
 static int cpy_utf8(unsigned long value, void *arg);

 /*
  * These functions take a string in UTF8, ASCII or multibyte form and a mask
  * of permissible ASN1 string types. It then works out the minimal type
  * (using the order Numeric < Printable < IA5 < T61 < BMP < Universal < UTF8)
  * and creates a string of the correct type with the supplied data. Yes this is
  * horrible: it has to be :-( The 'ncopy' form checks minimum and maximum
  * size limits too.
  */

 int ASN1_mbstring_copy(ASN1_STRING **out, const unsigned char *in, int len,
                        int inform, unsigned long mask)
 {
     return ASN1_mbstring_ncopy(out, in, len, inform, mask, 0, 0);
 }

 int ASN1_mbstring_ncopy(ASN1_STRING **out, const unsigned char *in, int len,
                         int inform, unsigned long mask,
                         long minsize, long maxsize)
 {
     int str_type;
     int ret;
     char free_out;
     int outform, outlen = 0;
     ASN1_STRING *dest;
     unsigned char *p;
     int nchar;
     int (*cpyfunc) (unsigned long, void *) = NULL;
     if (len == -1)
         len = strlen((const char *)in);
     if (!mask)
         mask = DIRSTRING_TYPE;
     if (len < 0)
         return -1;

     /* First do a string check and work out the number of characters */
     switch (inform) {

     case MBSTRING_BMP:
         if (len & 1) {
             ERR_raise(ERR_LIB_ASN1, ASN1_R_INVALID_BMPSTRING_LENGTH);
             return -1;
         }
         nchar = len >> 1;
         break;

     case MBSTRING_UNIV:
         if (len & 3) {
             ERR_raise(ERR_LIB_ASN1, ASN1_R_INVALID_UNIVERSALSTRING_LENGTH);
             return -1;
         }
         nchar = len >> 2;
         break;

     case MBSTRING_UTF8:
         nchar = 0;
         /* This counts the characters and does utf8 syntax checking */
         ret = traverse_string(in, len, MBSTRING_UTF8, in_utf8, &nchar);
         if (ret < 0) {
             ERR_raise(ERR_LIB_ASN1, ASN1_R_INVALID_UTF8STRING);
             return -1;
         }
         break;

     case MBSTRING_ASC:
         nchar = len;
         break;

     default:
         ERR_raise(ERR_LIB_ASN1, ASN1_R_UNKNOWN_FORMAT);
         return -1;
     }

     if ((minsize > 0) && (nchar < minsize)) {
         ERR_raise_data(ERR_LIB_ASN1, ASN1_R_STRING_TOO_SHORT,
                        "minsize=%ld", minsize);
         return -1;
     }

     if ((maxsize > 0) && (nchar > maxsize)) {
         ERR_raise_data(ERR_LIB_ASN1, ASN1_R_STRING_TOO_LONG,
                        "maxsize=%ld", maxsize);
         return -1;
     }

     /* Now work out minimal type (if any) */
     if (traverse_string(in, len, inform, type_str, &mask) < 0) {
         ERR_raise(ERR_LIB_ASN1, ASN1_R_ILLEGAL_CHARACTERS);
         return -1;
     }

     /* Now work out output format and string type */
     outform = MBSTRING_ASC;
     if (mask & B_ASN1_NUMERICSTRING)
         str_type = V_ASN1_NUMERICSTRING;
     else if (mask & B_ASN1_PRINTABLESTRING)
         str_type = V_ASN1_PRINTABLESTRING;
     else if (mask & B_ASN1_IA5STRING)
         str_type = V_ASN1_IA5STRING;
     else if (mask & B_ASN1_T61STRING)
         str_type = V_ASN1_T61STRING;
     else if (mask & B_ASN1_BMPSTRING) {
         str_type = V_ASN1_BMPSTRING;
         outform = MBSTRING_BMP;
     } else if (mask & B_ASN1_UNIVERSALSTRING) {
         str_type = V_ASN1_UNIVERSALSTRING;
         outform = MBSTRING_UNIV;
     } else {
         str_type = V_ASN1_UTF8STRING;
         outform = MBSTRING_UTF8;
     }
     if (!out)
         return str_type;
     if (*out) {
         free_out = 0;
         dest = *out;
         OPENSSL_free(dest->data);
         dest->data = NULL;
         dest->length = 0;
         dest->type = str_type;
     } else {
         free_out = 1;
         dest = ASN1_STRING_type_new(str_type);
         if (dest == NULL) {
             ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
             return -1;
         }
         *out = dest;
     }
     /* If both the same type just copy across */
     if (inform == outform) {
         if (!ASN1_STRING_set(dest, in, len)) {
             ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
             return -1;
         }
         return str_type;
     }

     /* Work out how much space the destination will need */
     switch (outform) {
     case MBSTRING_ASC:
         outlen = nchar;
         cpyfunc = cpy_asc;
         break;

     case MBSTRING_BMP:
         outlen = nchar << 1;
         cpyfunc = cpy_bmp;
         break;

     case MBSTRING_UNIV:
         outlen = nchar << 2;
         cpyfunc = cpy_univ;
         break;

     case MBSTRING_UTF8:
         outlen = 0;
         traverse_string(in, len, inform, out_utf8, &outlen);
         cpyfunc = cpy_utf8;
         break;
     }
     if ((p = OPENSSL_malloc(outlen + 1)) == NULL) {
         if (free_out)
             ASN1_STRING_free(dest);
         ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
         return -1;
     }
     dest->length = outlen;
     dest->data = p;
     p[outlen] = 0;
     traverse_string(in, len, inform, cpyfunc, &p);
     return str_type;
 }

 /*
  * This function traverses a string and passes the value of each character to
  * an optional function along with a void * argument.
  */

 static int traverse_string(const unsigned char *p, int len, int inform,
                            int (*rfunc) (unsigned long value, void *in),
                            void *arg)
 {
     unsigned long value;
     int ret;
     while (len) {
         if (inform == MBSTRING_ASC) {
             value = *p++;
             len--;
         } else if (inform == MBSTRING_BMP) {
             value = *p++ << 8;
             value |= *p++;
             len -= 2;
         } else if (inform == MBSTRING_UNIV) {
             value = ((unsigned long)*p++) << 24;
             value |= ((unsigned long)*p++) << 16;
             value |= *p++ << 8;
             value |= *p++;
             len -= 4;
         } else {
             ret = UTF8_getc(p, len, &value);
             if (ret < 0)
                 return -1;
             len -= ret;
             p += ret;
         }
         if (rfunc) {
             ret = rfunc(value, arg);
             if (ret <= 0)
                 return ret;
         }
     }
     return 1;
 }

 /* Various utility functions for traverse_string */

 /* Just count number of characters */

 static int in_utf8(unsigned long value, void *arg)
 {
     int *nchar;

     if (!is_unicode_valid(value))
         return -2;
     nchar = arg;
     (*nchar)++;
     return 1;
 }

 /* Determine size of output as a UTF8 String */

 static int out_utf8(unsigned long value, void *arg)
 {
     int *outlen, len;

     len = UTF8_putc(NULL, -1, value);
     if (len <= 0)
         return len;
     outlen = arg;
     *outlen += len;
     return 1;
 }

 /*
  * Determine the "type" of a string: check each character against a supplied
  * "mask".
  */

 static int type_str(unsigned long value, void *arg)
 {
     unsigned long types = *((unsigned long *)arg);
     const int native = value > INT_MAX ? INT_MAX : ossl_fromascii(value);

     if ((types & B_ASN1_NUMERICSTRING) && !(ossl_isdigit(native)
                                             || native == ' '))
         types &= ~B_ASN1_NUMERICSTRING;
     if ((types & B_ASN1_PRINTABLESTRING) && !ossl_isasn1print(native))
         types &= ~B_ASN1_PRINTABLESTRING;
     if ((types & B_ASN1_IA5STRING) && !ossl_isascii(native))
         types &= ~B_ASN1_IA5STRING;
     if ((types & B_ASN1_T61STRING) && (value > 0xff))
         types &= ~B_ASN1_T61STRING;
     if ((types & B_ASN1_BMPSTRING) && (value > 0xffff))
         types &= ~B_ASN1_BMPSTRING;
     if ((types & B_ASN1_UTF8STRING) && !is_unicode_valid(value))
         types &= ~B_ASN1_UTF8STRING;
     if (!types)
         return -1;
     *((unsigned long *)arg) = types;
     return 1;
 }

 /* Copy one byte per character ASCII like strings */

 static int cpy_asc(unsigned long value, void *arg)
 {
     unsigned char **p, *q;
     p = arg;
     q = *p;
     *q = (unsigned char)value;
     (*p)++;
     return 1;
 }

 /* Copy two byte per character BMPStrings */

 static int cpy_bmp(unsigned long value, void *arg)
 {
     unsigned char **p, *q;
     p = arg;
     q = *p;
     *q++ = (unsigned char)((value >> 8) & 0xff);
     *q = (unsigned char)(value & 0xff);
     *p += 2;
     return 1;
 }

 /* Copy four byte per character UniversalStrings */

 static int cpy_univ(unsigned long value, void *arg)
 {
     unsigned char **p, *q;
     p = arg;
     q = *p;
     *q++ = (unsigned char)((value >> 24) & 0xff);
     *q++ = (unsigned char)((value >> 16) & 0xff);
     *q++ = (unsigned char)((value >> 8) & 0xff);
     *q = (unsigned char)(value & 0xff);
     *p += 4;
     return 1;
 }

 /* Copy to a UTF8String */

 static int cpy_utf8(unsigned long value, void *arg)
 {
     unsigned char **p;
     int ret;
     p = arg;
     /* We already know there is enough room so pass 0xff as the length */
     ret = UTF8_putc(*p, 0xff, value);
     *p += ret;
     return 1;
 }
	/*
	* Copyright 1999-2021 The OpenSSL Project Authors. All Rights Reserved.
	*
	* Licensed under the Apache License 2.0 (the "License"). You may not use
	* this file except in compliance with the License. You can obtain a copy
	* in the file LICENSE in the source distribution or at
	* https://www.openssl.org/source/license.html
	*/

	#include <stdio.h>
	#include "crypto/ctype.h"
	#include "internal/cryptlib.h"
	#include "internal/unicode.h"
	#include <openssl/asn1.h>

	static int traverse_string(const unsigned char *p, int len, int inform,
	int (rfunc) (unsigned long value, void in),
	void *arg);
	static int in_utf8(unsigned long value, void *arg);
	static int out_utf8(unsigned long value, void *arg);
	static int type_str(unsigned long value, void *arg);
	static int cpy_asc(unsigned long value, void *arg);
	static int cpy_bmp(unsigned long value, void *arg);
	static int cpy_univ(unsigned long value, void *arg);
	static int cpy_utf8(unsigned long value, void *arg);

	/*
	* These functions take a string in UTF8, ASCII or multibyte form and a mask
	* of permissible ASN1 string types. It then works out the minimal type
	* (using the order Numeric < Printable < IA5 < T61 < BMP < Universal < UTF8)
	* and creates a string of the correct type with the supplied data. Yes this is
	* horrible: it has to be :-( The 'ncopy' form checks minimum and maximum
	* size limits too.
	*/

	int ASN1_mbstring_copy(ASN1_STRING *out, const unsigned char in, int len,
	int inform, unsigned long mask)
	{
	return ASN1_mbstring_ncopy(out, in, len, inform, mask, 0, 0);
	}

	int ASN1_mbstring_ncopy(ASN1_STRING *out, const unsigned char in, int len,
	int inform, unsigned long mask,
	long minsize, long maxsize)
	{
	int str_type;
	int ret;
	char free_out;
	int outform, outlen = 0;
	ASN1_STRING *dest;
	unsigned char *p;
	int nchar;
	int (cpyfunc) (unsigned long, void ) = NULL;
	if (len == -1)
	len = strlen((const char *)in);
	if (!mask)
	mask = DIRSTRING_TYPE;
	if (len < 0)
	return -1;

	/* First do a string check and work out the number of characters */
	switch (inform) {

	case MBSTRING_BMP:
	if (len & 1) {
	ERR_raise(ERR_LIB_ASN1, ASN1_R_INVALID_BMPSTRING_LENGTH);
	return -1;
	}
	nchar = len >> 1;
	break;

	case MBSTRING_UNIV:
	if (len & 3) {
	ERR_raise(ERR_LIB_ASN1, ASN1_R_INVALID_UNIVERSALSTRING_LENGTH);
	return -1;
	}
	nchar = len >> 2;
	break;

	case MBSTRING_UTF8:
	nchar = 0;
	/* This counts the characters and does utf8 syntax checking */
	ret = traverse_string(in, len, MBSTRING_UTF8, in_utf8, &nchar);
	if (ret < 0) {
	ERR_raise(ERR_LIB_ASN1, ASN1_R_INVALID_UTF8STRING);
	return -1;
	}
	break;

	case MBSTRING_ASC:
	nchar = len;
	break;

	default:
	ERR_raise(ERR_LIB_ASN1, ASN1_R_UNKNOWN_FORMAT);
	return -1;
	}

	if ((minsize > 0) && (nchar < minsize)) {
	ERR_raise_data(ERR_LIB_ASN1, ASN1_R_STRING_TOO_SHORT,
	"minsize=%ld", minsize);
	return -1;
	}

	if ((maxsize > 0) && (nchar > maxsize)) {
	ERR_raise_data(ERR_LIB_ASN1, ASN1_R_STRING_TOO_LONG,
	"maxsize=%ld", maxsize);
	return -1;
	}

	/* Now work out minimal type (if any) */
	if (traverse_string(in, len, inform, type_str, &mask) < 0) {
	ERR_raise(ERR_LIB_ASN1, ASN1_R_ILLEGAL_CHARACTERS);
	return -1;
	}

	/* Now work out output format and string type */
	outform = MBSTRING_ASC;
	if (mask & B_ASN1_NUMERICSTRING)
	str_type = V_ASN1_NUMERICSTRING;
	else if (mask & B_ASN1_PRINTABLESTRING)
	str_type = V_ASN1_PRINTABLESTRING;
	else if (mask & B_ASN1_IA5STRING)
	str_type = V_ASN1_IA5STRING;
	else if (mask & B_ASN1_T61STRING)
	str_type = V_ASN1_T61STRING;
	else if (mask & B_ASN1_BMPSTRING) {
	str_type = V_ASN1_BMPSTRING;
	outform = MBSTRING_BMP;
	} else if (mask & B_ASN1_UNIVERSALSTRING) {
	str_type = V_ASN1_UNIVERSALSTRING;
	outform = MBSTRING_UNIV;
	} else {
	str_type = V_ASN1_UTF8STRING;
	outform = MBSTRING_UTF8;
	}
	if (!out)
	return str_type;
	if (*out) {
	free_out = 0;
	dest = *out;
	OPENSSL_free(dest->data);
	dest->data = NULL;
	dest->length = 0;
	dest->type = str_type;
	} else {
	free_out = 1;
	dest = ASN1_STRING_type_new(str_type);
	if (dest == NULL) {
	ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
	return -1;
	}
	*out = dest;
	}
	/* If both the same type just copy across */
	if (inform == outform) {
	if (!ASN1_STRING_set(dest, in, len)) {
	ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
	return -1;
	}
	return str_type;
	}

	/* Work out how much space the destination will need */
	switch (outform) {
	case MBSTRING_ASC:
	outlen = nchar;
	cpyfunc = cpy_asc;
	break;

	case MBSTRING_BMP:
	outlen = nchar << 1;
	cpyfunc = cpy_bmp;
	break;

	case MBSTRING_UNIV:
	outlen = nchar << 2;
	cpyfunc = cpy_univ;
	break;

	case MBSTRING_UTF8:
	outlen = 0;
	traverse_string(in, len, inform, out_utf8, &outlen);
	cpyfunc = cpy_utf8;
	break;
	}
	if ((p = OPENSSL_malloc(outlen + 1)) == NULL) {
	if (free_out)
	ASN1_STRING_free(dest);
	ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
	return -1;
	}
	dest->length = outlen;
	dest->data = p;
	p[outlen] = 0;
	traverse_string(in, len, inform, cpyfunc, &p);
	return str_type;
	}

	/*
	* This function traverses a string and passes the value of each character to
	* an optional function along with a void * argument.
	*/

	static int traverse_string(const unsigned char *p, int len, int inform,
	int (rfunc) (unsigned long value, void in),
	void *arg)
	{
	unsigned long value;
	int ret;
	while (len) {
	if (inform == MBSTRING_ASC) {
	value = *p++;
	len--;
	} else if (inform == MBSTRING_BMP) {
	value = *p++ << 8;
	value \|= *p++;
	len -= 2;
	} else if (inform == MBSTRING_UNIV) {
	value = ((unsigned long)*p++) << 24;
	value \|= ((unsigned long)*p++) << 16;
	value \|= *p++ << 8;
	value \|= *p++;
	len -= 4;
	} else {
	ret = UTF8_getc(p, len, &value);
	if (ret < 0)
	return -1;
	len -= ret;
	p += ret;
	}
	if (rfunc) {
	ret = rfunc(value, arg);
	if (ret <= 0)
	return ret;
	}
	}
	return 1;
	}

	/* Various utility functions for traverse_string */

	/* Just count number of characters */

	static int in_utf8(unsigned long value, void *arg)
	{
	int *nchar;

	if (!is_unicode_valid(value))
	return -2;
	nchar = arg;
	(*nchar)++;
	return 1;
	}

	/* Determine size of output as a UTF8 String */

	static int out_utf8(unsigned long value, void *arg)
	{
	int *outlen, len;

	len = UTF8_putc(NULL, -1, value);
	if (len <= 0)
	return len;
	outlen = arg;
	*outlen += len;
	return 1;
	}

	/*
	* Determine the "type" of a string: check each character against a supplied
	* "mask".
	*/

	static int type_str(unsigned long value, void *arg)
	{
	unsigned long types = ((unsigned long )arg);
	const int native = value > INT_MAX ? INT_MAX : ossl_fromascii(value);

	if ((types & B_ASN1_NUMERICSTRING) && !(ossl_isdigit(native)
	\|\| native == ' '))
	types &= ~B_ASN1_NUMERICSTRING;
	if ((types & B_ASN1_PRINTABLESTRING) && !ossl_isasn1print(native))
	types &= ~B_ASN1_PRINTABLESTRING;
	if ((types & B_ASN1_IA5STRING) && !ossl_isascii(native))
	types &= ~B_ASN1_IA5STRING;
	if ((types & B_ASN1_T61STRING) && (value > 0xff))
	types &= ~B_ASN1_T61STRING;
	if ((types & B_ASN1_BMPSTRING) && (value > 0xffff))
	types &= ~B_ASN1_BMPSTRING;
	if ((types & B_ASN1_UTF8STRING) && !is_unicode_valid(value))
	types &= ~B_ASN1_UTF8STRING;
	if (!types)
	return -1;
	((unsigned long )arg) = types;
	return 1;
	}

	/* Copy one byte per character ASCII like strings */

	static int cpy_asc(unsigned long value, void *arg)
	{
	unsigned char *p, q;
	p = arg;
	q = *p;
	*q = (unsigned char)value;
	(*p)++;
	return 1;
	}

	/* Copy two byte per character BMPStrings */

	static int cpy_bmp(unsigned long value, void *arg)
	{
	unsigned char *p, q;
	p = arg;
	q = *p;
	*q++ = (unsigned char)((value >> 8) & 0xff);
	*q = (unsigned char)(value & 0xff);
	*p += 2;
	return 1;
	}

	/* Copy four byte per character UniversalStrings */

	static int cpy_univ(unsigned long value, void *arg)
	{
	unsigned char *p, q;
	p = arg;
	q = *p;
	*q++ = (unsigned char)((value >> 24) & 0xff);
	*q++ = (unsigned char)((value >> 16) & 0xff);
	*q++ = (unsigned char)((value >> 8) & 0xff);
	*q = (unsigned char)(value & 0xff);
	*p += 4;
	return 1;
	}

	/* Copy to a UTF8String */

	static int cpy_utf8(unsigned long value, void *arg)
	{
	unsigned char **p;
	int ret;
	p = arg;
	/* We already know there is enough room so pass 0xff as the length */
	ret = UTF8_putc(*p, 0xff, value);
	*p += ret;
	return 1;
	}