Bring in compatibility for OpenSSL 1.1 style init functions.

This adds OPENSSL_init_crypto and OPENSSL_init_ssl, as well
thread safety modifications for the existing LibreSSL init
functions.  The initialization routines are called automatically
by the normal entry points into the library, as in newer OpenSSL

ok jsing@, nits by tb@ and deraadt@

2 files changed, 44 insertions, 6 deletions

diff --git a/lib/libcrypto/err/err.c b/lib/libcrypto/err/err.c
index ffe25bf4656..320078da664 100644
--- a/lib/libcrypto/err/err.c
+++ b/lib/libcrypto/err/err.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: err.c,v 1.45 2017/02/20 23:21:19 beck Exp $ */
+/* $OpenBSD: err.c,v 1.46 2018/03/17 16:20:01 beck Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -109,6 +109,7 @@
  *
  */
 
+#include <pthread.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
@@ -282,6 +283,8 @@ static LHASH_OF(ERR_STATE) *int_thread_hash = NULL;
 static int int_thread_hash_references = 0;
 static int int_err_library_number = ERR_LIB_USER;
 
+static pthread_t err_init_thread;
+
 /* Internal function that checks whether "err_fns" is set and if not, sets it to
  * the defaults. */
 static void
@@ -650,8 +653,9 @@ ERR_STATE_free(ERR_STATE *s)
 }
 
 void
-ERR_load_ERR_strings(void)
+ERR_load_ERR_strings_internal(void)
 {
+	err_init_thread = pthread_self();
 	err_fns_check();
 #ifndef OPENSSL_NO_ERR
 	err_load_strings(0, ERR_str_libraries);
@@ -662,6 +666,21 @@ ERR_load_ERR_strings(void)
 #endif
 }
 
+
+void
+ERR_load_ERR_strings(void)
+{
+	static pthread_once_t once = PTHREAD_ONCE_INIT;
+
+	if (pthread_equal(pthread_self(), err_init_thread))
+		return; /* don't recurse */
+
+	/* Prayer and clean living lets you ignore errors, OpenSSL style */
+	(void) OPENSSL_init_crypto(0, NULL);
+
+	(void) pthread_once(&once, ERR_load_ERR_strings_internal);
+}
+
 static void
 err_load_strings(int lib, ERR_STRING_DATA *str)
 {
@@ -683,6 +702,9 @@ ERR_load_strings(int lib, ERR_STRING_DATA *str)
 void
 ERR_unload_strings(int lib, ERR_STRING_DATA *str)
 {
+	/* Prayer and clean living lets you ignore errors, OpenSSL style */
+	(void) OPENSSL_init_crypto(0, NULL);
+
 	while (str->error) {
 		if (lib)
 			str->error |= ERR_PACK(lib, 0, 0);
@@ -694,6 +716,9 @@ ERR_unload_strings(int lib, ERR_STRING_DATA *str)
 void
 ERR_free_strings(void)
 {
+	/* Prayer and clean living lets you ignore errors, OpenSSL style */
+	(void) OPENSSL_init_crypto(0, NULL);
+
 	err_fns_check();
 	ERRFN(err_del)();
 }
@@ -953,6 +978,9 @@ ERR_lib_error_string(unsigned long e)
 	ERR_STRING_DATA d, *p;
 	unsigned long l;
 
+	if (!OPENSSL_init_crypto(0, NULL))
+		return NULL;
+
 	err_fns_check();
 	l = ERR_GET_LIB(e);
 	d.error = ERR_PACK(l, 0, 0);
diff --git a/lib/libcrypto/err/err_all.c b/lib/libcrypto/err/err_all.c
index 40009cbe882..24de3c9c155 100644
--- a/lib/libcrypto/err/err_all.c
+++ b/lib/libcrypto/err/err_all.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: err_all.c,v 1.23 2016/10/19 16:49:11 jsing Exp $ */
+/* $OpenBSD: err_all.c,v 1.24 2018/03/17 16:20:01 beck Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -56,6 +56,7 @@
  * [including the GNU Public Licence.]
  */
 
+#include <pthread.h>
 #include <stdio.h>
 
 #include <openssl/opensslconf.h>
@@ -103,11 +104,13 @@
 #include <openssl/gost.h>
 #endif
 
-void
-ERR_load_crypto_strings(void)
+void ERR_load_ERR_strings_internal(void);
+
+static void
+ERR_load_crypto_strings_internal(void)
 {
 #ifndef OPENSSL_NO_ERR
-	ERR_load_ERR_strings(); /* include error strings for SYSerr */
+	ERR_load_ERR_strings_internal(); /* include error strings for SYSerr */
 	ERR_load_BN_strings();
 #ifndef OPENSSL_NO_RSA
 	ERR_load_RSA_strings();
@@ -153,3 +156,10 @@ ERR_load_crypto_strings(void)
 #endif
 #endif
 }
+
+void
+ERR_load_crypto_strings(void)
+{
+	static pthread_once_t loaded = PTHREAD_ONCE_INIT;
+	(void) pthread_once(&loaded, ERR_load_crypto_strings_internal);
+}