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/*
* Copyright 1999-2020 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 "internal/cryptlib.h"
#include <openssl/pkcs12.h>
/* Cheap and nasty Unicode stuff */
unsigned char *OPENSSL_asc2uni(const char *asc, int asclen,
unsigned char **uni, int *unilen)
{
int ulen, i;
unsigned char *unitmp;
if (asclen == -1)
asclen = strlen(asc);
if (asclen < 0)
return NULL;
ulen = asclen * 2 + 2;
if ((unitmp = OPENSSL_malloc(ulen)) == NULL) {
ERR_raise(ERR_LIB_PKCS12, ERR_R_MALLOC_FAILURE);
return NULL;
}
for (i = 0; i < ulen - 2; i += 2) {
unitmp[i] = 0;
unitmp[i + 1] = asc[i >> 1];
}
/* Make result double null terminated */
unitmp[ulen - 2] = 0;
unitmp[ulen - 1] = 0;
if (unilen)
*unilen = ulen;
if (uni)
*uni = unitmp;
return unitmp;
}
char *OPENSSL_uni2asc(const unsigned char *uni, int unilen)
{
int asclen, i;
char *asctmp;
/* string must contain an even number of bytes */
if (unilen & 1)
return NULL;
if (unilen < 0)
return NULL;
asclen = unilen / 2;
/* If no terminating zero allow for one */
if (!unilen || uni[unilen - 1])
asclen++;
uni++;
if ((asctmp = OPENSSL_malloc(asclen)) == NULL) {
ERR_raise(ERR_LIB_PKCS12, ERR_R_MALLOC_FAILURE);
return NULL;
}
for (i = 0; i < unilen; i += 2)
asctmp[i >> 1] = uni[i];
asctmp[asclen - 1] = 0;
return asctmp;
}
/*
* OPENSSL_{utf82uni|uni2utf8} perform conversion between UTF-8 and
* PKCS#12 BMPString format, which is specified as big-endian UTF-16.
* One should keep in mind that even though BMPString is passed as
* unsigned char *, it's not the kind of string you can exercise e.g.
* strlen on. Caller also has to keep in mind that its length is
* expressed not in number of UTF-16 characters, but in number of
* bytes the string occupies, and treat it, the length, accordingly.
*/
unsigned char *OPENSSL_utf82uni(const char *asc, int asclen,
unsigned char **uni, int *unilen)
{
int ulen, i, j;
unsigned char *unitmp, *ret;
unsigned long utf32chr = 0;
if (asclen == -1)
asclen = strlen(asc);
for (ulen = 0, i = 0; i < asclen; i += j) {
j = UTF8_getc((const unsigned char *)asc+i, asclen-i, &utf32chr);
/*
* Following condition is somewhat opportunistic is sense that
* decoding failure is used as *indirect* indication that input
* string might in fact be extended ASCII/ANSI/ISO-8859-X. The
* fallback is taken in hope that it would allow to process
* files created with previous OpenSSL version, which used the
* naive OPENSSL_asc2uni all along. It might be worth noting
* that probability of false positive depends on language. In
* cases covered by ISO Latin 1 probability is very low, because
* any printable non-ASCII alphabet letter followed by another
* or any ASCII character will trigger failure and fallback.
* In other cases situation can be intensified by the fact that
* English letters are not part of alternative keyboard layout,
* but even then there should be plenty of pairs that trigger
* decoding failure...
*/
if (j < 0)
return OPENSSL_asc2uni(asc, asclen, uni, unilen);
if (utf32chr > 0x10FFFF) /* UTF-16 cap */
return NULL;
if (utf32chr >= 0x10000) /* pair of UTF-16 characters */
ulen += 2*2;
else /* or just one */
ulen += 2;
}
ulen += 2; /* for trailing UTF16 zero */
if ((ret = OPENSSL_malloc(ulen)) == NULL) {
ERR_raise(ERR_LIB_PKCS12, ERR_R_MALLOC_FAILURE);
return NULL;
}
/* re-run the loop writing down UTF-16 characters in big-endian order */
for (unitmp = ret, i = 0; i < asclen; i += j) {
j = UTF8_getc((const unsigned char *)asc+i, asclen-i, &utf32chr);
if (utf32chr >= 0x10000) { /* pair if UTF-16 characters */
unsigned int hi, lo;
utf32chr -= 0x10000;
hi = 0xD800 + (utf32chr>>10);
lo = 0xDC00 + (utf32chr&0x3ff);
*unitmp++ = (unsigned char)(hi>>8);
*unitmp++ = (unsigned char)(hi);
*unitmp++ = (unsigned char)(lo>>8);
*unitmp++ = (unsigned char)(lo);
} else { /* or just one */
*unitmp++ = (unsigned char)(utf32chr>>8);
*unitmp++ = (unsigned char)(utf32chr);
}
}
/* Make result double null terminated */
*unitmp++ = 0;
*unitmp++ = 0;
if (unilen)
*unilen = ulen;
if (uni)
*uni = ret;
return ret;
}
static int bmp_to_utf8(char *str, const unsigned char *utf16, int len)
{
unsigned long utf32chr;
if (len == 0) return 0;
if (len < 2) return -1;
/* pull UTF-16 character in big-endian order */
utf32chr = (utf16[0]<<8) | utf16[1];
if (utf32chr >= 0xD800 && utf32chr < 0xE000) { /* two chars */
unsigned int lo;
if (len < 4) return -1;
utf32chr -= 0xD800;
utf32chr <<= 10;
lo = (utf16[2]<<8) | utf16[3];
if (lo < 0xDC00 || lo >= 0xE000) return -1;
utf32chr |= lo-0xDC00;
utf32chr += 0x10000;
}
return UTF8_putc((unsigned char *)str, len > 4 ? 4 : len, utf32chr);
}
char *OPENSSL_uni2utf8(const unsigned char *uni, int unilen)
{
int asclen, i, j;
char *asctmp;
/* string must contain an even number of bytes */
if (unilen & 1)
return NULL;
for (asclen = 0, i = 0; i < unilen; ) {
j = bmp_to_utf8(NULL, uni+i, unilen-i);
/*
* falling back to OPENSSL_uni2asc makes lesser sense [than
* falling back to OPENSSL_asc2uni in OPENSSL_utf82uni above],
* it's done rather to maintain symmetry...
*/
if (j < 0) return OPENSSL_uni2asc(uni, unilen);
if (j == 4) i += 4;
else i += 2;
asclen += j;
}
/* If no terminating zero allow for one */
if (!unilen || (uni[unilen-2]||uni[unilen - 1]))
asclen++;
if ((asctmp = OPENSSL_malloc(asclen)) == NULL) {
ERR_raise(ERR_LIB_PKCS12, ERR_R_MALLOC_FAILURE);
return NULL;
}
/* re-run the loop emitting UTF-8 string */
for (asclen = 0, i = 0; i < unilen; ) {
j = bmp_to_utf8(asctmp+asclen, uni+i, unilen-i);
if (j == 4) i += 4;
else i += 2;
asclen += j;
}
/* If no terminating zero write one */
if (!unilen || (uni[unilen-2]||uni[unilen - 1]))
asctmp[asclen] = '\0';
return asctmp;
}
int i2d_PKCS12_bio(BIO *bp, const PKCS12 *p12)
{
return ASN1_item_i2d_bio(ASN1_ITEM_rptr(PKCS12), bp, p12);
}
#ifndef OPENSSL_NO_STDIO
int i2d_PKCS12_fp(FILE *fp, const PKCS12 *p12)
{
return ASN1_item_i2d_fp(ASN1_ITEM_rptr(PKCS12), fp, p12);
}
#endif
PKCS12 *d2i_PKCS12_bio(BIO *bp, PKCS12 **p12)
{
return ASN1_item_d2i_bio(ASN1_ITEM_rptr(PKCS12), bp, p12);
}
#ifndef OPENSSL_NO_STDIO
PKCS12 *d2i_PKCS12_fp(FILE *fp, PKCS12 **p12)
{
return ASN1_item_d2i_fp(ASN1_ITEM_rptr(PKCS12), fp, p12);
}
#endif
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