Use the ASN1_TIME_normalize() function to normalize the time value before
printing to get GMT results.
-=head1 EXAMPLES
-
-Set a time structure to one hour after the current time and print it out:
-
- #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);
-
-Determine if one time is later or sooner than the current time:
-
- int day, sec;
-
- if (!ASN1_TIME_diff(&day, &sec, NULL, to))
- /* Invalid time format */
-
- if (day > 0 || sec > 0)
- printf("Later\n");
- else if (day < 0 || sec < 0)
- printf("Sooner\n");
- else
- printf("Same\n");
-
=head1 RETURN VALUES
ASN1_TIME_set(), ASN1_UTCTIME_set(), ASN1_GENERALIZEDTIME_set(), ASN1_TIME_adj(),
ASN1_TIME_to_generalizedtime() returns a pointer to
the appropriate time structure on success or NULL if an error occurred.
+=head1 EXAMPLES
+
+Set a time structure to one hour after the current time and print it out:
+
+ #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);
+
+Determine if one time is later or sooner than the current time:
+
+ int day, sec;
+
+ if (!ASN1_TIME_diff(&day, &sec, NULL, to))
+ /* Invalid time format */
+
+ if (day > 0 || sec > 0)
+ printf("Later\n");
+ else if (day < 0 || sec < 0)
+ printf("Sooner\n");
+ else
+ printf("Same\n");
+
=head1 HISTORY
The ASN1_TIME_to_tm() function was added in OpenSSL 1.1.1.