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diff --git a/secure/lib/libcrypto/man/man3/ASN1_TIME_set.3 b/secure/lib/libcrypto/man/man3/ASN1_TIME_set.3 new file mode 100644 index 000000000000..8529522d18c3 --- /dev/null +++ b/secure/lib/libcrypto/man/man3/ASN1_TIME_set.3 @@ -0,0 +1,413 @@ +.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.42) +.\" +.\" Standard preamble: +.\" ======================================================================== +.de Sp \" Vertical space (when we can't use .PP) +.if t .sp .5v +.if n .sp +.. +.de Vb \" Begin verbatim text +.ft CW +.nf +.ne \\$1 +.. +.de Ve \" End verbatim text +.ft R +.fi +.. +.\" Set up some character translations and predefined strings. \*(-- will +.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left +.\" double quote, and \*(R" will give a right double quote. \*(C+ will +.\" give a nicer C++. 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Always turn off hyphenation; it makes +.\" way too many mistakes in technical documents. +.if n .ad l +.nh +.SH "NAME" +ASN1_TIME_set, ASN1_UTCTIME_set, ASN1_GENERALIZEDTIME_set, +ASN1_TIME_adj, ASN1_UTCTIME_adj, ASN1_GENERALIZEDTIME_adj, +ASN1_TIME_check, ASN1_UTCTIME_check, ASN1_GENERALIZEDTIME_check, +ASN1_TIME_set_string, ASN1_UTCTIME_set_string, ASN1_GENERALIZEDTIME_set_string, +ASN1_TIME_set_string_X509, +ASN1_TIME_normalize, +ASN1_TIME_to_tm, +ASN1_TIME_print, ASN1_TIME_print_ex, ASN1_UTCTIME_print, ASN1_GENERALIZEDTIME_print, +ASN1_TIME_diff, +ASN1_TIME_cmp_time_t, ASN1_UTCTIME_cmp_time_t, +ASN1_TIME_compare, +ASN1_TIME_to_generalizedtime, +ASN1_TIME_dup, ASN1_UTCTIME_dup, ASN1_GENERALIZEDTIME_dup \- ASN.1 Time functions +.SH "SYNOPSIS" +.IX Header "SYNOPSIS" +.Vb 4 +\& ASN1_TIME *ASN1_TIME_set(ASN1_TIME *s, time_t t); +\& ASN1_UTCTIME *ASN1_UTCTIME_set(ASN1_UTCTIME *s, time_t t); +\& ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_set(ASN1_GENERALIZEDTIME *s, +\& time_t t); +\& +\& ASN1_TIME *ASN1_TIME_adj(ASN1_TIME *s, time_t t, int offset_day, +\& long offset_sec); +\& ASN1_UTCTIME *ASN1_UTCTIME_adj(ASN1_UTCTIME *s, time_t t, +\& int offset_day, long offset_sec); +\& ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_adj(ASN1_GENERALIZEDTIME *s, +\& time_t t, int offset_day, +\& long offset_sec); +\& +\& int ASN1_TIME_set_string(ASN1_TIME *s, const char *str); +\& int ASN1_TIME_set_string_X509(ASN1_TIME *s, const char *str); +\& int ASN1_UTCTIME_set_string(ASN1_UTCTIME *s, const char *str); +\& int ASN1_GENERALIZEDTIME_set_string(ASN1_GENERALIZEDTIME *s, +\& const char *str); +\& +\& int ASN1_TIME_normalize(ASN1_TIME *s); +\& +\& int ASN1_TIME_check(const ASN1_TIME *t); +\& int ASN1_UTCTIME_check(const ASN1_UTCTIME *t); +\& int ASN1_GENERALIZEDTIME_check(const ASN1_GENERALIZEDTIME *t); +\& +\& int ASN1_TIME_print(BIO *b, const ASN1_TIME *s); +\& int ASN1_TIME_print_ex(BIO *bp, const ASN1_TIME *tm, unsigned long flags); +\& int ASN1_UTCTIME_print(BIO *b, const ASN1_UTCTIME *s); +\& int ASN1_GENERALIZEDTIME_print(BIO *b, const ASN1_GENERALIZEDTIME *s); +\& +\& int ASN1_TIME_to_tm(const ASN1_TIME *s, struct tm *tm); +\& int ASN1_TIME_diff(int *pday, int *psec, const ASN1_TIME *from, +\& const ASN1_TIME *to); +\& +\& int ASN1_TIME_cmp_time_t(const ASN1_TIME *s, time_t t); +\& int ASN1_UTCTIME_cmp_time_t(const ASN1_UTCTIME *s, time_t t); +\& +\& int ASN1_TIME_compare(const ASN1_TIME *a, const ASN1_TIME *b); +\& +\& ASN1_GENERALIZEDTIME *ASN1_TIME_to_generalizedtime(ASN1_TIME *t, +\& ASN1_GENERALIZEDTIME **out); +\& +\& ASN1_TIME *ASN1_TIME_dup(const ASN1_TIME *t); +\& ASN1_UTCTIME *ASN1_UTCTIME_dup(const ASN1_UTCTIME *t); +\& ASN1_GENERALIZEDTIME *ASN1_GENERALIZEDTIME_dup(const ASN1_GENERALIZEDTIME *t); +.Ve +.SH "DESCRIPTION" +.IX Header "DESCRIPTION" +The \fBASN1_TIME_set()\fR, \fBASN1_UTCTIME_set()\fR and \fBASN1_GENERALIZEDTIME_set()\fR +functions set the structure \fIs\fR to the time represented by the time_t +value \fIt\fR. If \fIs\fR is \s-1NULL\s0 a new time structure is allocated and returned. +.PP +The \fBASN1_TIME_adj()\fR, \fBASN1_UTCTIME_adj()\fR and \fBASN1_GENERALIZEDTIME_adj()\fR +functions set the time structure \fIs\fR to the time represented +by the time \fIoffset_day\fR and \fIoffset_sec\fR after the time_t value \fIt\fR. +The values of \fIoffset_day\fR or \fIoffset_sec\fR can be negative to set a +time before \fIt\fR. The \fIoffset_sec\fR value can also exceed the number of +seconds in a day. If \fIs\fR is \s-1NULL\s0 a new structure is allocated +and returned. +.PP +The \fBASN1_TIME_set_string()\fR, \fBASN1_UTCTIME_set_string()\fR and +\&\fBASN1_GENERALIZEDTIME_set_string()\fR functions set the time structure \fIs\fR +to the time represented by string \fIstr\fR which must be in appropriate \s-1ASN.1\s0 +time format (for example \s-1YYMMDDHHMMSSZ\s0 or \s-1YYYYMMDDHHMMSSZ\s0). If \fIs\fR is \s-1NULL\s0 +this function performs a format check on \fIstr\fR only. The string \fIstr\fR +is copied into \fIs\fR. +.PP +\&\fBASN1_TIME_set_string_X509()\fR sets \fB\s-1ASN1_TIME\s0\fR structure \fIs\fR to the time +represented by string \fIstr\fR which must be in appropriate time format +that \s-1RFC 5280\s0 requires, which means it only allows \s-1YYMMDDHHMMSSZ\s0 and +\&\s-1YYYYMMDDHHMMSSZ\s0 (leap second is rejected), all other \s-1ASN.1\s0 time format +are not allowed. If \fIs\fR is \s-1NULL\s0 this function performs a format check +on \fIstr\fR only. +.PP +The \fBASN1_TIME_normalize()\fR function converts an \fB\s-1ASN1_GENERALIZEDTIME\s0\fR or +\&\fB\s-1ASN1_UTCTIME\s0\fR into a time value that can be used in a certificate. It +should be used after the \fBASN1_TIME_set_string()\fR functions and before +\&\fBASN1_TIME_print()\fR functions to get consistent (i.e. \s-1GMT\s0) results. +.PP +The \fBASN1_TIME_check()\fR, \fBASN1_UTCTIME_check()\fR and \fBASN1_GENERALIZEDTIME_check()\fR +functions check the syntax of the time structure \fIs\fR. +.PP +The \fBASN1_TIME_print()\fR, \fBASN1_UTCTIME_print()\fR and \fBASN1_GENERALIZEDTIME_print()\fR +functions print the time structure \fIs\fR to \s-1BIO\s0 \fIb\fR in human readable +format. It will be of the format \s-1MMM DD HH:MM:SS YYYY\s0 [\s-1GMT\s0], for example +\&\*(L"Feb 3 00:55:52 2015 \s-1GMT\*(R",\s0 which does not include a newline. +If the time structure has invalid format it prints out \*(L"Bad time value\*(R" and +returns an error. The output for generalized time may include a fractional part +following the second. +.PP +\&\fBASN1_TIME_print_ex()\fR provides \fIflags\fR to specify the output format of the +datetime. This can be either \fB\s-1ASN1_DTFLGS_RFC822\s0\fR or \fB\s-1ASN1_DTFLGS_ISO8601\s0\fR. +.PP +\&\fBASN1_TIME_to_tm()\fR converts the time \fIs\fR to the standard \fItm\fR structure. +If \fIs\fR is \s-1NULL,\s0 then the current time is converted. The output time is \s-1GMT.\s0 +The \fItm_sec\fR, \fItm_min\fR, \fItm_hour\fR, \fItm_mday\fR, \fItm_wday\fR, \fItm_yday\fR, +\&\fItm_mon\fR and \fItm_year\fR fields of \fItm\fR structure are set to proper values, +whereas all other fields are set to 0. If \fItm\fR is \s-1NULL\s0 this function performs +a format check on \fIs\fR only. If \fIs\fR is in Generalized format with fractional +seconds, e.g. \s-1YYYYMMDDHHMMSS.SSSZ,\s0 the fractional seconds will be lost while +converting \fIs\fR to \fItm\fR structure. +.PP +\&\fBASN1_TIME_diff()\fR sets \fI*pday\fR and \fI*psec\fR to the time difference between +\&\fIfrom\fR and \fIto\fR. If \fIto\fR represents a time later than \fIfrom\fR then +one or both (depending on the time difference) of \fI*pday\fR and \fI*psec\fR +will be positive. If \fIto\fR represents a time earlier than \fIfrom\fR then +one or both of \fI*pday\fR and \fI*psec\fR will be negative. If \fIto\fR and \fIfrom\fR +represent the same time then \fI*pday\fR and \fI*psec\fR will both be zero. +If both \fI*pday\fR and \fI*psec\fR are nonzero they will always have the same +sign. The value of \fI*psec\fR will always be less than the number of seconds +in a day. If \fIfrom\fR or \fIto\fR is \s-1NULL\s0 the current time is used. +.PP +The \fBASN1_TIME_cmp_time_t()\fR and \fBASN1_UTCTIME_cmp_time_t()\fR functions compare +the two times represented by the time structure \fIs\fR and the time_t \fIt\fR. +.PP +The \fBASN1_TIME_compare()\fR function compares the two times represented by the +time structures \fIa\fR and \fIb\fR. +.PP +The \fBASN1_TIME_to_generalizedtime()\fR function converts an \fB\s-1ASN1_TIME\s0\fR to an +\&\fB\s-1ASN1_GENERALIZEDTIME\s0\fR, regardless of year. If either \fIout\fR or +\&\fI*out\fR are \s-1NULL,\s0 then a new object is allocated and must be freed after use. +.PP +The \fBASN1_TIME_dup()\fR, \fBASN1_UTCTIME_dup()\fR and \fBASN1_GENERALIZEDTIME_dup()\fR functions +duplicate the time structure \fIt\fR and return the duplicated result +correspondingly. +.SH "NOTES" +.IX Header "NOTES" +The \fB\s-1ASN1_TIME\s0\fR structure corresponds to the \s-1ASN.1\s0 structure \fBTime\fR +defined in \s-1RFC5280\s0 et al. The time setting functions obey the rules outlined +in \s-1RFC5280:\s0 if the date can be represented by UTCTime it is used, else +GeneralizedTime is used. +.PP +The \fB\s-1ASN1_TIME\s0\fR, \fB\s-1ASN1_UTCTIME\s0\fR and \fB\s-1ASN1_GENERALIZEDTIME\s0\fR structures are +represented as an \fB\s-1ASN1_STRING\s0\fR internally and can be freed up using +\&\fBASN1_STRING_free()\fR. +.PP +The \fB\s-1ASN1_TIME\s0\fR structure can represent years from 0000 to 9999 but no attempt +is made to correct ancient calendar changes (for example from Julian to +Gregorian calendars). +.PP +\&\fB\s-1ASN1_UTCTIME\s0\fR is limited to a year range of 1950 through 2049. +.PP +Some applications add offset times directly to a time_t value and pass the +results to \fBASN1_TIME_set()\fR (or equivalent). This can cause problems as the +time_t value can overflow on some systems resulting in unexpected results. +New applications should use \fBASN1_TIME_adj()\fR instead and pass the offset value +in the \fIoffset_sec\fR and \fIoffset_day\fR parameters instead of directly +manipulating a time_t value. +.PP +\&\fBASN1_TIME_adj()\fR may change the type from \fB\s-1ASN1_GENERALIZEDTIME\s0\fR to +\&\fB\s-1ASN1_UTCTIME\s0\fR, or vice versa, based on the resulting year. +\&\fBASN1_GENERALIZEDTIME_adj()\fR and \fBASN1_UTCTIME_adj()\fR will not modify the type +of the return structure. +.PP +It is recommended that functions starting with \fB\s-1ASN1_TIME\s0\fR be used instead of +those starting with \fB\s-1ASN1_UTCTIME\s0\fR or \fB\s-1ASN1_GENERALIZEDTIME\s0\fR. The functions +starting with \fB\s-1ASN1_UTCTIME\s0\fR and \fB\s-1ASN1_GENERALIZEDTIME\s0\fR act only on that +specific time format. The functions starting with \fB\s-1ASN1_TIME\s0\fR will operate on +either format. +.SH "BUGS" +.IX Header "BUGS" +\&\fBASN1_TIME_print()\fR, \fBASN1_UTCTIME_print()\fR and \fBASN1_GENERALIZEDTIME_print()\fR do +not print out the timezone: it either prints out \*(L"\s-1GMT\*(R"\s0 or nothing. But all +certificates complying with \s-1RFC5280\s0 et al use \s-1GMT\s0 anyway. +.PP +\&\fBASN1_TIME_print()\fR, \fBASN1_TIME_print_ex()\fR, \fBASN1_UTCTIME_print()\fR and +\&\fBASN1_GENERALIZEDTIME_print()\fR do not distinguish if they fail because +of an I/O error or invalid time format. +.PP +Use the \fBASN1_TIME_normalize()\fR function to normalize the time value before +printing to get \s-1GMT\s0 results. +.SH "RETURN VALUES" +.IX Header "RETURN VALUES" +\&\fBASN1_TIME_set()\fR, \fBASN1_UTCTIME_set()\fR, \fBASN1_GENERALIZEDTIME_set()\fR, +\&\fBASN1_TIME_adj()\fR, \fBASN1_UTCTIME_adj()\fR and \fBASN1_GENERALIZEDTIME_set()\fR return +a pointer to a time structure or \s-1NULL\s0 if an error occurred. +.PP +\&\fBASN1_TIME_set_string()\fR, \fBASN1_UTCTIME_set_string()\fR, +\&\fBASN1_GENERALIZEDTIME_set_string()\fR and \fBASN1_TIME_set_string_X509()\fR return +1 if the time value is successfully set and 0 otherwise. +.PP +\&\fBASN1_TIME_normalize()\fR returns 1 on success, and 0 on error. +.PP +\&\fBASN1_TIME_check()\fR, ASN1_UTCTIME_check and \fBASN1_GENERALIZEDTIME_check()\fR return 1 +if the structure is syntactically correct and 0 otherwise. +.PP +\&\fBASN1_TIME_print()\fR, \fBASN1_UTCTIME_print()\fR and \fBASN1_GENERALIZEDTIME_print()\fR +return 1 if the time is successfully printed out and +0 if an I/O error occurred an error occurred (I/O error or invalid time format). +.PP +\&\fBASN1_TIME_to_tm()\fR returns 1 if the time is successfully parsed and 0 if an +error occurred (invalid time format). +.PP +\&\fBASN1_TIME_diff()\fR returns 1 for success and 0 for failure. It can fail if the +passed-in time structure has invalid syntax, for example. +.PP +\&\fBASN1_TIME_cmp_time_t()\fR and \fBASN1_UTCTIME_cmp_time_t()\fR return \-1 if \fIs\fR is +before \fIt\fR, 0 if \fIs\fR equals \fIt\fR, or 1 if \fIs\fR is after \fIt\fR. \-2 is returned +on error. +.PP +\&\fBASN1_TIME_compare()\fR returns \-1 if \fIa\fR is before \fIb\fR, 0 if \fIa\fR equals \fIb\fR, +or 1 if \fIa\fR is after \fIb\fR. \-2 is returned on error. +.PP +\&\fBASN1_TIME_to_generalizedtime()\fR returns a pointer to the appropriate time +structure on success or \s-1NULL\s0 if an error occurred. +.PP +\&\fBASN1_TIME_dup()\fR, \fBASN1_UTCTIME_dup()\fR and \fBASN1_GENERALIZEDTIME_dup()\fR return a +pointer to a time structure or \s-1NULL\s0 if an error occurred. +.SH "EXAMPLES" +.IX Header "EXAMPLES" +Set a time structure to one hour after the current time and print it out: +.PP +.Vb 2 +\& #include <time.h> +\& #include <openssl/asn1.h> +\& +\& ASN1_TIME *tm; +\& time_t t; +\& BIO *b; +\& +\& t = time(NULL); +\& tm = ASN1_TIME_adj(NULL, t, 0, 60 * 60); +\& b = BIO_new_fp(stdout, BIO_NOCLOSE); +\& ASN1_TIME_print(b, tm); +\& ASN1_STRING_free(tm); +\& BIO_free(b); +.Ve +.PP +Determine if one time is later or sooner than the current time: +.PP +.Vb 1 +\& int day, sec; +\& +\& if (!ASN1_TIME_diff(&day, &sec, NULL, to)) +\& /* Invalid time format */ +\& +\& if (day > 0 || sec > 0) +\& printf("Later\en"); +\& else if (day < 0 || sec < 0) +\& printf("Sooner\en"); +\& else +\& printf("Same\en"); +.Ve +.SH "HISTORY" +.IX Header "HISTORY" +The \fBASN1_TIME_to_tm()\fR function was added in OpenSSL 1.1.1. +The \fBASN1_TIME_set_string_X509()\fR function was added in OpenSSL 1.1.1. +The \fBASN1_TIME_normalize()\fR function was added in OpenSSL 1.1.1. +The \fBASN1_TIME_cmp_time_t()\fR function was added in OpenSSL 1.1.1. +The \fBASN1_TIME_compare()\fR function was added in OpenSSL 1.1.1. +.SH "COPYRIGHT" +.IX Header "COPYRIGHT" +Copyright 2015\-2021 The OpenSSL Project Authors. All Rights Reserved. +.PP +Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use +this file except in compliance with the License. You can obtain a copy +in the file \s-1LICENSE\s0 in the source distribution or at +<https://www.openssl.org/source/license.html>. |