return unitmp;
}
-char *OPENSSL_uni2asc(unsigned char *uni, int unilen)
+char *OPENSSL_uni2asc(const unsigned char *uni, int unilen)
{
int asclen, i;
char *asctmp;
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)
+ 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)
+ 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, PKCS12 *p12)
{
return ASN1_item_i2d_bio(ASN1_ITEM_rptr(PKCS12), bp, p12);
projects / openssl.git / blobdiff