From: =?utf-8?b?T25kxZllaiBTdXLDvQ==?= <ondrej@sury.org>
Date: Fri, 31 Dec 2021 07:40:21 +0100
Subject: Lower the OpenSSL requirement to 1.0.1

---
 build/php.m4              | 2 +-
 ext/openssl/config0.m4    | 2 +-
 ext/openssl/openssl.c     | 9 ++++++++-
 ext/openssl/php_openssl.h | 4 +++-
 ext/openssl/xp_ssl.c      | 9 +++++++++
 5 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/build/php.m4 b/build/php.m4
index e13fc33..0648237 100644
--- a/build/php.m4
+++ b/build/php.m4
@@ -1929,7 +1929,7 @@ dnl
 AC_DEFUN([PHP_SETUP_OPENSSL],[
   found_openssl=no
 
-  PKG_CHECK_MODULES([OPENSSL], [openssl >= 1.0.2], [found_openssl=yes])
+  PKG_CHECK_MODULES([OPENSSL], [openssl >= 1.0.1], [found_openssl=yes])
 
   if test "$found_openssl" = "yes"; then
     PHP_EVAL_LIBLINE($OPENSSL_LIBS, $1)
diff --git a/ext/openssl/config0.m4 b/ext/openssl/config0.m4
index ffd4e07..3bc1a08 100644
--- a/ext/openssl/config0.m4
+++ b/ext/openssl/config0.m4
@@ -1,7 +1,7 @@
 PHP_ARG_WITH([openssl],
   [for OpenSSL support],
   [AS_HELP_STRING([--with-openssl],
-    [Include OpenSSL support (requires OpenSSL >= 1.0.2)])])
+    [Include OpenSSL support (requires OpenSSL >= 1.0.1)])])
 
 PHP_ARG_WITH([kerberos],
   [for Kerberos support],
diff --git a/ext/openssl/openssl.c b/ext/openssl/openssl.c
index 9e703f7..48cdb4e 100644
--- a/ext/openssl/openssl.c
+++ b/ext/openssl/openssl.c
@@ -95,7 +95,7 @@
 #endif
 #define DEBUG_SMIME	0
 
-#if !defined(OPENSSL_NO_EC) && defined(EVP_PKEY_EC)
+#if !defined(OPENSSL_NO_EC) && defined(EVP_PKEY_EC) && OPENSSL_VERSION_NUMBER >= 0x10002000L
 #define HAVE_EVP_PKEY_EC 1
 #endif
 
@@ -1236,6 +1236,13 @@ PHP_MINIT_FUNCTION(openssl)
 	OpenSSL_add_all_ciphers();
 	OpenSSL_add_all_digests();
 	OpenSSL_add_all_algorithms();
+
+#if !defined(OPENSSL_NO_AES) && defined(EVP_CIPH_CCM_MODE) && OPENSSL_VERSION_NUMBER < 0x100020000
+	EVP_add_cipher(EVP_aes_128_ccm());
+	EVP_add_cipher(EVP_aes_192_ccm());
+	EVP_add_cipher(EVP_aes_256_ccm());
+#endif
+
 	SSL_load_error_strings();
 #else
 	OPENSSL_init_ssl(OPENSSL_INIT_LOAD_CONFIG, NULL);
diff --git a/ext/openssl/php_openssl.h b/ext/openssl/php_openssl.h
index 5cfadbe..cd2dc1b 100644
--- a/ext/openssl/php_openssl.h
+++ b/ext/openssl/php_openssl.h
@@ -35,7 +35,9 @@ extern zend_module_entry openssl_module_entry;
 #endif
 #else
 /* OpenSSL version check */
-#if OPENSSL_VERSION_NUMBER < 0x10100000L
+#if OPENSSL_VERSION_NUMBER < 0x10002000L
+#define PHP_OPENSSL_API_VERSION 0x10001
+#elif OPENSSL_VERSION_NUMBER < 0x10100000L
 #define PHP_OPENSSL_API_VERSION 0x10002
 #elif OPENSSL_VERSION_NUMBER < 0x30000000L
 #define PHP_OPENSSL_API_VERSION 0x10100
diff --git a/ext/openssl/xp_ssl.c b/ext/openssl/xp_ssl.c
index a0db38c..6adc6cc 100644
--- a/ext/openssl/xp_ssl.c
+++ b/ext/openssl/xp_ssl.c
@@ -33,8 +33,11 @@
 #include <openssl/x509.h>
 #include <openssl/x509v3.h>
 #include <openssl/err.h>
+
+#if OPENSSL_VERSION_NUMBER >= 0x10002000L
 #include <openssl/bn.h>
 #include <openssl/dh.h>
+#endif
 
 #ifdef PHP_WIN32
 #include "win32/winutil.h"
@@ -86,8 +89,10 @@
 
 #ifndef OPENSSL_NO_TLSEXT
 #define HAVE_TLS_SNI 1
+#if OPENSSL_VERSION_NUMBER >= 0x10002000L
 #define HAVE_TLS_ALPN 1
 #endif
+#endif
 
 #if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
 #define HAVE_SEC_LEVEL 1
@@ -1316,8 +1321,12 @@ static int php_openssl_set_server_ecdh_curve(php_stream *stream, SSL_CTX *ctx) /
 
 	zvcurve = php_stream_context_get_option(PHP_STREAM_CONTEXT(stream), "ssl", "ecdh_curve");
 	if (zvcurve == NULL) {
+#if OPENSSL_VERSION_NUMBER >= 0x10002000L
 		SSL_CTX_set_ecdh_auto(ctx, 1);
 		return SUCCESS;
+#else
+		curve_nid = NID_X9_62_prime256v1;
+#endif
 	} else {
 		if (!try_convert_to_string(zvcurve)) {
 			return FAILURE;