mirror of https://github.com/openssl/openssl
250 lines
7.4 KiB
C
250 lines
7.4 KiB
C
/*
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* Copyright 1999-2021 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include "internal/cryptlib.h"
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#include <openssl/pkcs12.h>
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/* Cheap and nasty Unicode stuff */
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unsigned char *OPENSSL_asc2uni(const char *asc, int asclen,
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unsigned char **uni, int *unilen)
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{
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int ulen, i;
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unsigned char *unitmp;
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if (asclen == -1)
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asclen = strlen(asc);
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if (asclen < 0)
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return NULL;
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ulen = asclen * 2 + 2;
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if ((unitmp = OPENSSL_malloc(ulen)) == NULL) {
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ERR_raise(ERR_LIB_PKCS12, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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for (i = 0; i < ulen - 2; i += 2) {
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unitmp[i] = 0;
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unitmp[i + 1] = asc[i >> 1];
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}
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/* Make result double null terminated */
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unitmp[ulen - 2] = 0;
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unitmp[ulen - 1] = 0;
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if (unilen)
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*unilen = ulen;
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if (uni)
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*uni = unitmp;
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return unitmp;
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}
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char *OPENSSL_uni2asc(const unsigned char *uni, int unilen)
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{
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int asclen, i;
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char *asctmp;
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/* string must contain an even number of bytes */
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if (unilen & 1)
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return NULL;
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if (unilen < 0)
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return NULL;
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asclen = unilen / 2;
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/* If no terminating zero allow for one */
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if (!unilen || uni[unilen - 1])
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asclen++;
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uni++;
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if ((asctmp = OPENSSL_malloc(asclen)) == NULL) {
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ERR_raise(ERR_LIB_PKCS12, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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for (i = 0; i < unilen; i += 2)
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asctmp[i >> 1] = uni[i];
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asctmp[asclen - 1] = 0;
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return asctmp;
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}
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/*
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* OPENSSL_{utf82uni|uni2utf8} perform conversion between UTF-8 and
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* PKCS#12 BMPString format, which is specified as big-endian UTF-16.
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* One should keep in mind that even though BMPString is passed as
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* unsigned char *, it's not the kind of string you can exercise e.g.
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* strlen on. Caller also has to keep in mind that its length is
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* expressed not in number of UTF-16 characters, but in number of
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* bytes the string occupies, and treat it, the length, accordingly.
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*/
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unsigned char *OPENSSL_utf82uni(const char *asc, int asclen,
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unsigned char **uni, int *unilen)
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{
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int ulen, i, j;
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unsigned char *unitmp, *ret;
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unsigned long utf32chr = 0;
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if (asclen == -1)
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asclen = strlen(asc);
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for (ulen = 0, i = 0; i < asclen; i += j) {
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j = UTF8_getc((const unsigned char *)asc+i, asclen-i, &utf32chr);
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/*
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* Following condition is somewhat opportunistic is sense that
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* decoding failure is used as *indirect* indication that input
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* string might in fact be extended ASCII/ANSI/ISO-8859-X. The
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* fallback is taken in hope that it would allow to process
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* files created with previous OpenSSL version, which used the
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* naive OPENSSL_asc2uni all along. It might be worth noting
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* that probability of false positive depends on language. In
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* cases covered by ISO Latin 1 probability is very low, because
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* any printable non-ASCII alphabet letter followed by another
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* or any ASCII character will trigger failure and fallback.
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* In other cases situation can be intensified by the fact that
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* English letters are not part of alternative keyboard layout,
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* but even then there should be plenty of pairs that trigger
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* decoding failure...
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*/
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if (j < 0)
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return OPENSSL_asc2uni(asc, asclen, uni, unilen);
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if (utf32chr > 0x10FFFF) /* UTF-16 cap */
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return NULL;
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if (utf32chr >= 0x10000) /* pair of UTF-16 characters */
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ulen += 2*2;
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else /* or just one */
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ulen += 2;
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}
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ulen += 2; /* for trailing UTF16 zero */
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if ((ret = OPENSSL_malloc(ulen)) == NULL) {
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ERR_raise(ERR_LIB_PKCS12, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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/* re-run the loop writing down UTF-16 characters in big-endian order */
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for (unitmp = ret, i = 0; i < asclen; i += j) {
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j = UTF8_getc((const unsigned char *)asc+i, asclen-i, &utf32chr);
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if (utf32chr >= 0x10000) { /* pair if UTF-16 characters */
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unsigned int hi, lo;
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utf32chr -= 0x10000;
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hi = 0xD800 + (utf32chr>>10);
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lo = 0xDC00 + (utf32chr&0x3ff);
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*unitmp++ = (unsigned char)(hi>>8);
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*unitmp++ = (unsigned char)(hi);
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*unitmp++ = (unsigned char)(lo>>8);
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*unitmp++ = (unsigned char)(lo);
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} else { /* or just one */
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*unitmp++ = (unsigned char)(utf32chr>>8);
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*unitmp++ = (unsigned char)(utf32chr);
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}
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}
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/* Make result double null terminated */
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*unitmp++ = 0;
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*unitmp++ = 0;
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if (unilen)
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*unilen = ulen;
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if (uni)
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*uni = ret;
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return ret;
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}
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static int bmp_to_utf8(char *str, const unsigned char *utf16, int len)
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{
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unsigned long utf32chr;
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if (len == 0) return 0;
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if (len < 2) return -1;
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/* pull UTF-16 character in big-endian order */
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utf32chr = (utf16[0]<<8) | utf16[1];
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if (utf32chr >= 0xD800 && utf32chr < 0xE000) { /* two chars */
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unsigned int lo;
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if (len < 4) return -1;
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utf32chr -= 0xD800;
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utf32chr <<= 10;
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lo = (utf16[2]<<8) | utf16[3];
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if (lo < 0xDC00 || lo >= 0xE000) return -1;
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utf32chr |= lo-0xDC00;
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utf32chr += 0x10000;
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}
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return UTF8_putc((unsigned char *)str, len > 4 ? 4 : len, utf32chr);
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}
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char *OPENSSL_uni2utf8(const unsigned char *uni, int unilen)
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{
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int asclen, i, j;
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char *asctmp;
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/* string must contain an even number of bytes */
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if (unilen & 1)
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return NULL;
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for (asclen = 0, i = 0; i < unilen; ) {
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j = bmp_to_utf8(NULL, uni+i, unilen-i);
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/*
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* falling back to OPENSSL_uni2asc makes lesser sense [than
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* falling back to OPENSSL_asc2uni in OPENSSL_utf82uni above],
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* it's done rather to maintain symmetry...
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*/
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if (j < 0) return OPENSSL_uni2asc(uni, unilen);
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if (j == 4) i += 4;
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else i += 2;
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asclen += j;
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}
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/* If no terminating zero allow for one */
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if (!unilen || (uni[unilen-2]||uni[unilen - 1]))
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asclen++;
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if ((asctmp = OPENSSL_malloc(asclen)) == NULL) {
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ERR_raise(ERR_LIB_PKCS12, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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/* re-run the loop emitting UTF-8 string */
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for (asclen = 0, i = 0; i < unilen; ) {
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j = bmp_to_utf8(asctmp+asclen, uni+i, unilen-i);
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if (j == 4) i += 4;
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else i += 2;
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asclen += j;
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}
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/* If no terminating zero write one */
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if (!unilen || (uni[unilen-2]||uni[unilen - 1]))
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asctmp[asclen] = '\0';
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return asctmp;
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}
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int i2d_PKCS12_bio(BIO *bp, const PKCS12 *p12)
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{
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return ASN1_item_i2d_bio(ASN1_ITEM_rptr(PKCS12), bp, p12);
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}
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#ifndef OPENSSL_NO_STDIO
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int i2d_PKCS12_fp(FILE *fp, const PKCS12 *p12)
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{
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return ASN1_item_i2d_fp(ASN1_ITEM_rptr(PKCS12), fp, p12);
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}
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#endif
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PKCS12 *d2i_PKCS12_bio(BIO *bp, PKCS12 **p12)
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{
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return ASN1_item_d2i_bio(ASN1_ITEM_rptr(PKCS12), bp, p12);
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}
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#ifndef OPENSSL_NO_STDIO
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PKCS12 *d2i_PKCS12_fp(FILE *fp, PKCS12 **p12)
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{
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return ASN1_item_d2i_fp(ASN1_ITEM_rptr(PKCS12), fp, p12);
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}
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#endif
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