a_time.c | Explore in Territory

/* Copyright (C) 1995-1998 Eric Young ([email protected])
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young ([email protected]).
 * 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 ([email protected]).
 *
 * 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 ([email protected])"
 *    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 ([email protected])"
 *
 * 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 <openssl/posix_time.h>

#include <string.h>
#include <time.h>

#include <openssl/asn1t.h>
#include <openssl/bytestring.h>
#include <openssl/err.h>
#include <openssl/mem.h>

#include "internal.h"

// This is an implementation of the ASN1 Time structure which is: Time ::=
// CHOICE { utcTime UTCTime, generalTime GeneralizedTime } written by Steve
// Henson.

IMPLEMENT_ASN1_MSTRING(ASN1_TIME, B_ASN1_TIME)

IMPLEMENT_ASN1_FUNCTIONS_const(…)

ASN1_TIME *ASN1_TIME_set_posix(ASN1_TIME *s, int64_t posix_time) { … }

ASN1_TIME *ASN1_TIME_set(ASN1_TIME *s, time_t time) { … }

static int fits_in_utc_time(const struct tm *tm) { … }

ASN1_TIME *ASN1_TIME_adj(ASN1_TIME *s, int64_t posix_time, int offset_day,
                         long offset_sec) { … }

int ASN1_TIME_check(const ASN1_TIME *t) { … }

// Convert an ASN1_TIME structure to GeneralizedTime
ASN1_GENERALIZEDTIME *ASN1_TIME_to_generalizedtime(const ASN1_TIME *t,
                                                   ASN1_GENERALIZEDTIME **out) { … }

int ASN1_TIME_set_string(ASN1_TIME *s, const char *str) { … }

int ASN1_TIME_set_string_X509(ASN1_TIME *s, const char *str) { … }

static int asn1_time_to_tm(struct tm *tm, const ASN1_TIME *t,
                           int allow_timezone_offset) { … }

int ASN1_TIME_diff(int *out_days, int *out_seconds, const ASN1_TIME *from,
                   const ASN1_TIME *to) { … }

// The functions below do *not* permissively allow the use of four digit
// timezone offsets in UTC times, as is done elsewhere in the code. They are
// both new API, and used internally to X509_cmp_time. This is to discourage the
// use of nonstandard times in new code, and to ensure that this code behaves
// correctly in X509_cmp_time which historically did its own time validations
// slightly different than the many other copies of X.509 time validation
// sprinkled through the codebase. The custom checks in X509_cmp_time meant that
// it did not allow four digit timezone offsets in UTC times.
int ASN1_TIME_to_time_t(const ASN1_TIME *t, time_t *out_time) { … }

int ASN1_TIME_to_posix(const ASN1_TIME *t, int64_t *out_time) { … }
chromium/third_party/boringssl/src/crypto/asn1/a_time.c
