Backported for 8.0 from


From 718e91343fddb8817a004f96f111c424843bf746 Mon Sep 17 00:00:00 2001
From: Remi Collet <remi@php.net>
Date: Wed, 11 Aug 2021 13:02:18 +0200
Subject: [PATCH] add SHA256 and SHA512 for security protocol

---
 ext/snmp/config.m4                            | 18 +++++++++-
 ext/snmp/snmp.c                               | 33 ++++++++++++++++++-
 .../tests/snmp-object-setSecurity_error.phpt  |  2 +-
 ext/snmp/tests/snmp3-error.phpt               |  2 +-
 4 files changed, 51 insertions(+), 4 deletions(-)

diff --git a/ext/snmp/config.m4 b/ext/snmp/config.m4
index 1475ddfe2b7f0..f285a572de9cb 100644
--- a/ext/snmp/config.m4
+++ b/ext/snmp/config.m4
@@ -30,7 +30,7 @@ if test "$PHP_SNMP" != "no"; then
         AC_MSG_ERROR([Could not find the required paths. Please check your net-snmp installation.])
       fi
     else
-      AC_MSG_ERROR([Net-SNMP version 5.3 or greater reqired (detected $snmp_full_version).])
+      AC_MSG_ERROR([Net-SNMP version 5.3 or greater required (detected $snmp_full_version).])
     fi
   else
     AC_MSG_ERROR([Could not find net-snmp-config binary. Please check your net-snmp installation.])
@@ -54,6 +54,22 @@ if test "$PHP_SNMP" != "no"; then
     $SNMP_SHARED_LIBADD
   ])
 
+  dnl Check whether usmHMAC192SHA256AuthProtocol exists.
+  PHP_CHECK_LIBRARY($SNMP_LIBNAME, usmHMAC192SHA256AuthProtocol,
+  [
+    AC_DEFINE(HAVE_SNMP_SHA256, 1, [ ])
+  ], [], [
+    $SNMP_SHARED_LIBADD
+  ])
+
+  dnl Check whether usmHMAC384SHA512AuthProtocol exists.
+  PHP_CHECK_LIBRARY($SNMP_LIBNAME, usmHMAC384SHA512AuthProtocol,
+  [
+    AC_DEFINE(HAVE_SNMP_SHA512, 1, [ ])
+  ], [], [
+    $SNMP_SHARED_LIBADD
+  ])
+
   PHP_NEW_EXTENSION(snmp, snmp.c, $ext_shared)
   PHP_SUBST(SNMP_SHARED_LIBADD)
 fi
diff --git a/ext/snmp/snmp.c b/ext/snmp/snmp.c
index 69d6549405b17..f0917501751f5 100644
--- a/ext/snmp/snmp.c
+++ b/ext/snmp/snmp.c
@@ -29,6 +29,7 @@
 #include "php_snmp.h"
 
 #include "zend_exceptions.h"
+#include "zend_smart_string.h"
 #include "ext/spl/spl_exceptions.h"
 #include "snmp_arginfo.h"
 
@@ -938,16 +939,48 @@ static int netsnmp_session_set_auth_protocol(struct snmp_session *s, char *prot)
 	if (!strcasecmp(prot, "MD5")) {
 		s->securityAuthProto = usmHMACMD5AuthProtocol;
 		s->securityAuthProtoLen = USM_AUTH_PROTO_MD5_LEN;
-	} else
+		return 0;
+	}
 #endif
+
 	if (!strcasecmp(prot, "SHA")) {
 		s->securityAuthProto = usmHMACSHA1AuthProtocol;
 		s->securityAuthProtoLen = USM_AUTH_PROTO_SHA_LEN;
-	} else {
-		zend_value_error("Authentication protocol must be either \"MD5\" or \"SHA\"");
-		return (-1);
+		return 0;
 	}
-	return (0);
+
+#ifdef HAVE_SNMP_SHA256
+	if (!strcasecmp(prot, "SHA256")) {
+		s->securityAuthProto = usmHMAC192SHA256AuthProtocol;
+		s->securityAuthProtoLen = sizeof(usmHMAC192SHA256AuthProtocol) / sizeof(oid);
+		return 0;
+	}
+#endif
+
+#ifdef HAVE_SNMP_SHA512
+	if (!strcasecmp(prot, "SHA512")) {
+		s->securityAuthProto = usmHMAC384SHA512AuthProtocol;
+		s->securityAuthProtoLen = sizeof(usmHMAC384SHA512AuthProtocol) / sizeof(oid);
+		return 0;
+	}
+#endif
+
+	smart_string err = {0};
+
+	smart_string_appends(&err, "Authentication protocol must be \"SHA\"");
+#ifdef HAVE_SNMP_SHA256
+	smart_string_appends(&err, " or \"SHA256\"");
+#endif
+#ifdef HAVE_SNMP_SHA512
+	smart_string_appends(&err, " or \"SHA512\"");
+#endif
+#ifndef DISABLE_MD5
+	smart_string_appends(&err, " or \"MD5\"");
+#endif
+	smart_string_0(&err);
+	zend_value_error("%s", err.c);
+	smart_string_free(&err);
+	return -1;
 }
 /* }}} */
 
diff --git a/ext/snmp/tests/snmp-object-setSecurity_error.phpt b/ext/snmp/tests/snmp-object-setSecurity_error.phpt
index f8de846492a75..cf4f928837773 100644
--- a/ext/snmp/tests/snmp-object-setSecurity_error.phpt
+++ b/ext/snmp/tests/snmp-object-setSecurity_error.phpt
@@ -59,7 +59,7 @@ var_dump($session->close());
 --EXPECTF--
 Security level must be one of "noAuthNoPriv", "authNoPriv", or "authPriv"
 Security level must be one of "noAuthNoPriv", "authNoPriv", or "authPriv"
-Authentication protocol must be either "MD5" or "SHA"
+Authentication protocol must be %s
 
 Warning: SNMP::setSecurity(): Error generating a key for authentication pass phrase '': Generic error (The supplied password length is too short.) in %s on line %d
 bool(false)
diff --git a/ext/snmp/tests/snmp3-error.phpt b/ext/snmp/tests/snmp3-error.phpt
index 849e363b45058..389800dad6b28 100644
--- a/ext/snmp/tests/snmp3-error.phpt
+++ b/ext/snmp/tests/snmp3-error.phpt
@@ -58,7 +58,7 @@ try {
 Checking error handling
 Security level must be one of "noAuthNoPriv", "authNoPriv", or "authPriv"
 Security level must be one of "noAuthNoPriv", "authNoPriv", or "authPriv"
-Authentication protocol must be either "MD5" or "SHA"
+Authentication protocol must be %s
 
 Warning: snmp3_get(): Error generating a key for authentication pass phrase '': Generic error (The supplied password length is too short.) in %s on line %d
 bool(false)