2 * Copyright 1999-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 #include "internal/cryptlib.h"
12 #include <openssl/pkcs12.h>
14 /* Cheap and nasty Unicode stuff */
16 unsigned char *OPENSSL_asc2uni(const char *asc, int asclen,
17 unsigned char **uni, int *unilen)
20 unsigned char *unitmp;
24 ulen = asclen * 2 + 2;
25 if ((unitmp = OPENSSL_malloc(ulen)) == NULL) {
26 PKCS12err(PKCS12_F_OPENSSL_ASC2UNI, ERR_R_MALLOC_FAILURE);
29 for (i = 0; i < ulen - 2; i += 2) {
31 unitmp[i + 1] = asc[i >> 1];
33 /* Make result double null terminated */
43 char *OPENSSL_uni2asc(const unsigned char *uni, int unilen)
47 /* string must contain an even number of bytes */
51 /* If no terminating zero allow for one */
52 if (!unilen || uni[unilen - 1])
55 if ((asctmp = OPENSSL_malloc(asclen)) == NULL) {
56 PKCS12err(PKCS12_F_OPENSSL_UNI2ASC, ERR_R_MALLOC_FAILURE);
59 for (i = 0; i < unilen; i += 2)
60 asctmp[i >> 1] = uni[i];
61 asctmp[asclen - 1] = 0;
66 * OPENSSL_{utf82uni|uni2utf8} perform conversion between UTF-8 and
67 * PKCS#12 BMPString format, which is specified as big-endian UTF-16.
68 * One should keep in mind that even though BMPString is passed as
69 * unsigned char *, it's not the kind of string you can exercise e.g.
70 * strlen on. Caller also has to keep in mind that its length is
71 * expressed not in number of UTF-16 characters, but in number of
72 * bytes the string occupies, and treat it, the length, accordingly.
74 unsigned char *OPENSSL_utf82uni(const char *asc, int asclen,
75 unsigned char **uni, int *unilen)
78 unsigned char *unitmp, *ret;
79 unsigned long utf32chr = 0;
84 for (ulen = 0, i = 0; i < asclen; i += j) {
85 j = UTF8_getc((const unsigned char *)asc+i, asclen-i, &utf32chr);
88 * Following condition is somewhat opportunistic is sense that
89 * decoding failure is used as *indirect* indication that input
90 * string might in fact be extended ASCII/ANSI/ISO-8859-X. The
91 * fallback is taken in hope that it would allow to process
92 * files created with previous OpenSSL version, which used the
93 * naive OPENSSL_asc2uni all along. It might be worth noting
94 * that probability of false positive depends on language. In
95 * cases covered by ISO Latin 1 probability is very low, because
96 * any printable non-ASCII alphabet letter followed by another
97 * or any ASCII character will trigger failure and fallback.
98 * In other cases situation can be intensified by the fact that
99 * English letters are not part of alternative keyboard layout,
100 * but even then there should be plenty of pairs that trigger
101 * decoding failure...
104 return OPENSSL_asc2uni(asc, asclen, uni, unilen);
106 if (utf32chr > 0x10FFFF) /* UTF-16 cap */
109 if (utf32chr >= 0x10000) /* pair of UTF-16 characters */
111 else /* or just one */
115 ulen += 2; /* for trailing UTF16 zero */
117 if ((ret = OPENSSL_malloc(ulen)) == NULL) {
118 PKCS12err(PKCS12_F_OPENSSL_UTF82UNI, ERR_R_MALLOC_FAILURE);
121 /* re-run the loop writing down UTF-16 characters in big-endian order */
122 for (unitmp = ret, i = 0; i < asclen; i += j) {
123 j = UTF8_getc((const unsigned char *)asc+i, asclen-i, &utf32chr);
124 if (utf32chr >= 0x10000) { /* pair if UTF-16 characters */
128 hi = 0xD800 + (utf32chr>>10);
129 lo = 0xDC00 + (utf32chr&0x3ff);
130 *unitmp++ = (unsigned char)(hi>>8);
131 *unitmp++ = (unsigned char)(hi);
132 *unitmp++ = (unsigned char)(lo>>8);
133 *unitmp++ = (unsigned char)(lo);
134 } else { /* or just one */
135 *unitmp++ = (unsigned char)(utf32chr>>8);
136 *unitmp++ = (unsigned char)(utf32chr);
139 /* Make result double null terminated */
149 static int bmp_to_utf8(char *str, const unsigned char *utf16, int len)
151 unsigned long utf32chr;
153 if (len == 0) return 0;
155 if (len < 2) return -1;
157 /* pull UTF-16 character in big-endian order */
158 utf32chr = (utf16[0]<<8) | utf16[1];
160 if (utf32chr >= 0xD800 && utf32chr < 0xE000) { /* two chars */
163 if (len < 4) return -1;
167 lo = (utf16[2]<<8) | utf16[3];
168 if (lo < 0xDC00 || lo >= 0xE000) return -1;
169 utf32chr |= lo-0xDC00;
173 return UTF8_putc((unsigned char *)str, len > 4 ? 4 : len, utf32chr);
176 char *OPENSSL_uni2utf8(const unsigned char *uni, int unilen)
181 /* string must contain an even number of bytes */
185 for (asclen = 0, i = 0; i < unilen; ) {
186 j = bmp_to_utf8(NULL, uni+i, unilen-i);
188 * falling back to OPENSSL_uni2asc makes lesser sense [than
189 * falling back to OPENSSL_asc2uni in OPENSSL_utf82uni above],
190 * it's done rather to maintain symmetry...
192 if (j < 0) return OPENSSL_uni2asc(uni, unilen);
198 /* If no terminating zero allow for one */
199 if (!unilen || (uni[unilen-2]||uni[unilen - 1]))
202 if ((asctmp = OPENSSL_malloc(asclen)) == NULL) {
203 PKCS12err(PKCS12_F_OPENSSL_UNI2UTF8, ERR_R_MALLOC_FAILURE);
207 /* re-run the loop emitting UTF-8 string */
208 for (asclen = 0, i = 0; i < unilen; ) {
209 j = bmp_to_utf8(asctmp+asclen, uni+i, unilen-i);
215 /* If no terminating zero write one */
216 if (!unilen || (uni[unilen-2]||uni[unilen - 1]))
217 asctmp[asclen] = '\0';
222 int i2d_PKCS12_bio(BIO *bp, PKCS12 *p12)
224 return ASN1_item_i2d_bio(ASN1_ITEM_rptr(PKCS12), bp, p12);
227 #ifndef OPENSSL_NO_STDIO
228 int i2d_PKCS12_fp(FILE *fp, PKCS12 *p12)
230 return ASN1_item_i2d_fp(ASN1_ITEM_rptr(PKCS12), fp, p12);
234 PKCS12 *d2i_PKCS12_bio(BIO *bp, PKCS12 **p12)
236 return ASN1_item_d2i_bio(ASN1_ITEM_rptr(PKCS12), bp, p12);
239 #ifndef OPENSSL_NO_STDIO
240 PKCS12 *d2i_PKCS12_fp(FILE *fp, PKCS12 **p12)
242 return ASN1_item_d2i_fp(ASN1_ITEM_rptr(PKCS12), fp, p12);