| /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| * All rights reserved. |
| * |
| * This package is an SSL implementation written |
| * by Eric Young (eay@cryptsoft.com). |
| * The implementation was written so as to conform with Netscapes SSL. |
| * |
| * This library is free for commercial and non-commercial use as long as |
| * the following conditions are aheared to. The following conditions |
| * apply to all code found in this distribution, be it the RC4, RSA, |
| * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| * included with this distribution is covered by the same copyright terms |
| * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| * |
| * Copyright remains Eric Young's, and as such any Copyright notices in |
| * the code are not to be removed. |
| * If this package is used in a product, Eric Young should be given attribution |
| * as the author of the parts of the library used. |
| * This can be in the form of a textual message at program startup or |
| * in documentation (online or textual) provided with the package. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * "This product includes cryptographic software written by |
| * Eric Young (eay@cryptsoft.com)" |
| * The word 'cryptographic' can be left out if the rouines from the library |
| * being used are not cryptographic related :-). |
| * 4. If you include any Windows specific code (or a derivative thereof) from |
| * the apps directory (application code) you must include an acknowledgement: |
| * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * The licence and distribution terms for any publically available version or |
| * derivative of this code cannot be changed. i.e. this code cannot simply be |
| * copied and put under another distribution licence |
| * [including the GNU Public Licence.] */ |
| |
| #include <openssl/asn1.h> |
| |
| #include <limits.h> |
| #include <string.h> |
| |
| #include <openssl/bytestring.h> |
| #include <openssl/err.h> |
| #include <openssl/mem.h> |
| |
| #include "asn1_locl.h" |
| #include "../bytestring/internal.h" |
| |
| static int is_printable(uint32_t value); |
| |
| /* |
| * 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 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); |
| } |
| |
| OPENSSL_DECLARE_ERROR_REASON(ASN1, INVALID_BMPSTRING) |
| OPENSSL_DECLARE_ERROR_REASON(ASN1, INVALID_UNIVERSALSTRING) |
| OPENSSL_DECLARE_ERROR_REASON(ASN1, INVALID_UTF8STRING) |
| |
| 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; |
| char free_out; |
| ASN1_STRING *dest; |
| size_t nchar = 0; |
| char strbuf[32]; |
| if (len == -1) |
| len = strlen((const char *)in); |
| if (!mask) |
| mask = DIRSTRING_TYPE; |
| |
| int (*decode_func)(CBS *, uint32_t*); |
| int error; |
| switch (inform) { |
| case MBSTRING_BMP: |
| decode_func = cbs_get_ucs2_be; |
| error = ASN1_R_INVALID_BMPSTRING; |
| break; |
| |
| case MBSTRING_UNIV: |
| decode_func = cbs_get_utf32_be; |
| error = ASN1_R_INVALID_UNIVERSALSTRING; |
| break; |
| |
| case MBSTRING_UTF8: |
| decode_func = cbs_get_utf8; |
| error = ASN1_R_INVALID_UTF8STRING; |
| break; |
| |
| case MBSTRING_ASC: |
| decode_func = cbs_get_latin1; |
| error = ERR_R_INTERNAL_ERROR; // Latin-1 inputs are never invalid. |
| break; |
| |
| default: |
| OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNKNOWN_FORMAT); |
| return -1; |
| } |
| |
| /* Check |minsize| and |maxsize| and work out the minimal type, if any. */ |
| CBS cbs; |
| CBS_init(&cbs, in, len); |
| size_t utf8_len = 0; |
| while (CBS_len(&cbs) != 0) { |
| uint32_t c; |
| if (!decode_func(&cbs, &c)) { |
| OPENSSL_PUT_ERROR(ASN1, error); |
| return -1; |
| } |
| if (nchar == 0 && |
| (inform == MBSTRING_BMP || inform == MBSTRING_UNIV) && |
| c == 0xfeff) { |
| /* Reject byte-order mark. We could drop it but that would mean |
| * adding ambiguity around whether a BOM was included or not when |
| * matching strings. |
| * |
| * For a little-endian UCS-2 string, the BOM will appear as 0xfffe |
| * and will be rejected as noncharacter, below. */ |
| OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_CHARACTERS); |
| return -1; |
| } |
| |
| /* Update which output formats are still possible. */ |
| if ((mask & B_ASN1_PRINTABLESTRING) && !is_printable(c)) { |
| mask &= ~B_ASN1_PRINTABLESTRING; |
| } |
| if ((mask & B_ASN1_IA5STRING) && (c > 127)) { |
| mask &= ~B_ASN1_IA5STRING; |
| } |
| if ((mask & B_ASN1_T61STRING) && (c > 0xff)) { |
| mask &= ~B_ASN1_T61STRING; |
| } |
| if ((mask & B_ASN1_BMPSTRING) && (c > 0xffff)) { |
| mask &= ~B_ASN1_BMPSTRING; |
| } |
| if (!mask) { |
| OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_CHARACTERS); |
| return -1; |
| } |
| |
| nchar++; |
| utf8_len += cbb_get_utf8_len(c); |
| } |
| |
| if (minsize > 0 && nchar < (size_t)minsize) { |
| OPENSSL_PUT_ERROR(ASN1, ASN1_R_STRING_TOO_SHORT); |
| BIO_snprintf(strbuf, sizeof strbuf, "%ld", minsize); |
| ERR_add_error_data(2, "minsize=", strbuf); |
| return -1; |
| } |
| |
| if (maxsize > 0 && nchar > (size_t)maxsize) { |
| OPENSSL_PUT_ERROR(ASN1, ASN1_R_STRING_TOO_LONG); |
| BIO_snprintf(strbuf, sizeof strbuf, "%ld", maxsize); |
| ERR_add_error_data(2, "maxsize=", strbuf); |
| return -1; |
| } |
| |
| /* Now work out output format and string type */ |
| int (*encode_func)(CBB *, uint32_t) = cbb_add_latin1; |
| size_t size_estimate = nchar; |
| int outform = MBSTRING_ASC; |
| 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; |
| encode_func = cbb_add_ucs2_be; |
| size_estimate = 2 * nchar; |
| } else if (mask & B_ASN1_UNIVERSALSTRING) { |
| str_type = V_ASN1_UNIVERSALSTRING; |
| encode_func = cbb_add_utf32_be; |
| size_estimate = 4 * nchar; |
| outform = MBSTRING_UNIV; |
| } else { |
| str_type = V_ASN1_UTF8STRING; |
| outform = MBSTRING_UTF8; |
| encode_func = cbb_add_utf8; |
| size_estimate = utf8_len; |
| } |
| |
| if (!out) |
| return str_type; |
| if (*out) { |
| free_out = 0; |
| dest = *out; |
| if (dest->data) { |
| dest->length = 0; |
| OPENSSL_free(dest->data); |
| dest->data = NULL; |
| } |
| dest->type = str_type; |
| } else { |
| free_out = 1; |
| dest = ASN1_STRING_type_new(str_type); |
| if (!dest) { |
| OPENSSL_PUT_ERROR(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)) { |
| OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE); |
| return -1; |
| } |
| return str_type; |
| } |
| |
| CBB cbb; |
| if (!CBB_init(&cbb, size_estimate + 1)) { |
| OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| CBS_init(&cbs, in, len); |
| while (CBS_len(&cbs) != 0) { |
| uint32_t c; |
| if (!decode_func(&cbs, &c) || |
| !encode_func(&cbb, c)) { |
| OPENSSL_PUT_ERROR(ASN1, ERR_R_INTERNAL_ERROR); |
| goto err; |
| } |
| } |
| uint8_t *data = NULL; |
| size_t data_len; |
| if (/* OpenSSL historically NUL-terminated this value with a single byte, |
| * even for |MBSTRING_BMP| and |MBSTRING_UNIV|. */ |
| !CBB_add_u8(&cbb, 0) || |
| !CBB_finish(&cbb, &data, &data_len) || |
| data_len < 1 || |
| data_len > INT_MAX) { |
| OPENSSL_PUT_ERROR(ASN1, ERR_R_INTERNAL_ERROR); |
| OPENSSL_free(data); |
| goto err; |
| } |
| dest->length = (int)(data_len - 1); |
| dest->data = data; |
| return str_type; |
| |
| err: |
| if (free_out) |
| ASN1_STRING_free(dest); |
| CBB_cleanup(&cbb); |
| return -1; |
| } |
| |
| /* Return 1 if the character is permitted in a PrintableString */ |
| static int is_printable(uint32_t value) |
| { |
| int ch; |
| if (value > 0x7f) |
| return 0; |
| ch = (int)value; |
| /* |
| * Note: we can't use 'isalnum' because certain accented characters may |
| * count as alphanumeric in some environments. |
| */ |
| if ((ch >= 'a') && (ch <= 'z')) |
| return 1; |
| if ((ch >= 'A') && (ch <= 'Z')) |
| return 1; |
| if ((ch >= '0') && (ch <= '9')) |
| return 1; |
| if ((ch == ' ') || strchr("'()+,-./:=?", ch)) |
| return 1; |
| return 0; |
| } |
