Prepare to expose OPENSSL_gmtime and OPENSSL_timegm as public

This matches when BoringSSL has done, and allows for getting
rid of the dependency on system timegm() and gmtime() in libtls.
which will make life easier for portable, and remove our
dependency on the potentially very slow system versions.

ok tb@ - tb will handle the minor bump bits and expose
on the next minor bump
CVS :----------------------------------------------------------------------

2 files changed, 23 insertions, 2 deletions

diff --git a/src/lib/libcrypto/asn1/a_time_posix.c b/src/lib/libcrypto/asn1/a_time_posix.c
index 9327aa8bf0..5d10d21d3c 100644
--- a/src/lib/libcrypto/asn1/a_time_posix.c
+++ b/src/lib/libcrypto/asn1/a_time_posix.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: a_time_posix.c,v 1.3 2023/01/01 16:58:23 miod Exp $ */
+/* $OpenBSD: a_time_posix.c,v 1.4 2023/11/13 12:46:07 beck Exp $ */
 /*
  * Copyright (c) 2022, Google Inc.
  * Copyright (c) 2022, Bob Beck <beck@obtuse.com>
@@ -26,6 +26,8 @@
 #include <string.h>
 #include <time.h>
 
+#include <openssl/asn1.h>
+
 #define SECS_PER_HOUR (int64_t)(60 * 60)
 #define SECS_PER_DAY (int64_t)(24 * SECS_PER_HOUR)
 
@@ -221,6 +223,20 @@ asn1_time_time_t_to_tm(const time_t *time, struct tm *out_tm)
 }
 
 int
+OPENSSL_timegm(const struct tm *tm, time_t *out) {
+        return asn1_time_tm_to_time_t(tm, out);
+}
+LCRYPTO_ALIAS(OPENSSL_timegm);
+
+struct tm *
+OPENSSL_gmtime(const time_t *time, struct tm *out_tm) {
+        if (!asn1_time_time_t_to_tm(time, out_tm))
+                return NULL;
+        return out_tm;
+}
+LCRYPTO_ALIAS(OPENSSL_gmtime);
+
+int
 OPENSSL_gmtime_adj(struct tm *tm, int off_day, long offset_sec)
 {
         int64_t posix_time;
diff --git a/src/lib/libcrypto/asn1/asn1.h b/src/lib/libcrypto/asn1/asn1.h
index 5eeee3317b..0816f2ac9a 100644
--- a/src/lib/libcrypto/asn1/asn1.h
+++ b/src/lib/libcrypto/asn1/asn1.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: asn1.h,v 1.80 2023/07/28 10:33:13 tb Exp $ */
+/* $OpenBSD: asn1.h,v 1.81 2023/11/13 12:46:07 beck Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -914,6 +914,11 @@ int SMIME_text(BIO *in, BIO *out);
 
 void ERR_load_ASN1_strings(void);
 
+#if defined(LIBRESSL_INTERNAL) || defined(LIBRESSL_NEXT_API)
+int OPENSSL_timegm(const struct tm *tm, time_t *out);
+struct tm *OPENSSL_gmtime(const time_t *time, struct tm *out_tm);
+#endif
+
 /* Error codes for the ASN1 functions. */
 
 /* Function codes. */