1 files changed, 148 insertions, 0 deletions
diff --git a/azurelinuxagent/distro/redhat/osutil.py b/azurelinuxagent/distro/redhat/osutil.py
new file mode 100644
index 0000000..c6c3016
--- /dev/null
+++ b/azurelinuxagent/distro/redhat/osutil.py
@@ -0,0 +1,148 @@
+#
+# Copyright 2014 Microsoft Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Requires Python 2.4+ and Openssl 1.0+
+#
+
+import os
+import re
+import pwd
+import shutil
+import socket
+import array
+import struct
+import fcntl
+import time
+import base64
+import azurelinuxagent.logger as logger
+from azurelinuxagent.future import text, bytebuffer
+import azurelinuxagent.utils.fileutil as fileutil
+import azurelinuxagent.utils.shellutil as shellutil
+import azurelinuxagent.utils.textutil as textutil
+from azurelinuxagent.distro.default.osutil import DefaultOSUtil, OSUtilError
+
+class Redhat6xOSUtil(DefaultOSUtil):
+    def __init__(self):
+        super(Redhat6xOSUtil, self).__init__()
+        self.sshd_conf_file_path = '/etc/ssh/sshd_config'
+        self.openssl_cmd = '/usr/bin/openssl'
+        self.conf_file_path = '/etc/waagent.conf'
+        self.selinux=None
+
+    def start_network(self):
+        return shellutil.run("/sbin/service networking start", chk_err=False)
+
+    def restart_ssh_service(self):
+        return shellutil.run("/sbin/service sshd condrestart", chk_err=False)
+
+    def stop_agent_service(self):
+        return shellutil.run("/sbin/service waagent stop", chk_err=False)
+
+    def start_agent_service(self):
+        return shellutil.run("/sbin/service waagent start", chk_err=False)
+
+    def register_agent_service(self):
+        return shellutil.run("chkconfig --add waagent", chk_err=False)
+
+    def unregister_agent_service(self):
+        return shellutil.run("chkconfig --del waagent", chk_err=False)
+
+    def asn1_to_ssh_rsa(self, pubkey):
+        lines = pubkey.split("\n")
+        lines = [x for x in lines if not x.startswith("----")]
+        base64_encoded = "".join(lines)
+        try:
+            #TODO remove pyasn1 dependency
+            from pyasn1.codec.der import decoder as der_decoder
+            der_encoded = base64.b64decode(base64_encoded)
+            der_encoded = der_decoder.decode(der_encoded)[0][1]
+            key = der_decoder.decode(self.bits_to_bytes(der_encoded))[0]
+            n=key[0]
+            e=key[1]
+            keydata = bytearray()
+            keydata.extend(struct.pack('>I', len("ssh-rsa")))
+            keydata.extend(b"ssh-rsa")
+            keydata.extend(struct.pack('>I', len(self.num_to_bytes(e))))
+            keydata.extend(self.num_to_bytes(e))
+            keydata.extend(struct.pack('>I', len(self.num_to_bytes(n)) + 1))
+            keydata.extend(b"\0")
+            keydata.extend(self.num_to_bytes(n))
+            keydata_base64 = base64.b64encode(bytebuffer(keydata))
+            return text(b"ssh-rsa " +  keydata_base64 + b"\n", 
+                        encoding='utf-8')
+        except ImportError as e:
+            raise OSUtilError("Failed to load pyasn1.codec.der")
+
+    def num_to_bytes(self, num):
+        """
+        Pack number into bytes.  Retun as string.
+        """
+        result = bytearray()
+        while num:
+            result.append(num & 0xFF)
+            num >>= 8
+        result.reverse()
+        return result
+
+    def bits_to_bytes(self, bits):
+        """
+        Convert an array contains bits, [0,1] to a byte array
+        """
+        index = 7
+        byte_array = bytearray()
+        curr = 0
+        for bit in bits:
+            curr = curr | (bit << index)
+            index = index - 1
+            if index == -1:
+                byte_array.append(curr)
+                curr = 0
+                index = 7
+        return bytes(byte_array)
+
+    def openssl_to_openssh(self, input_file, output_file):
+        pubkey = fileutil.read_file(input_file)
+        ssh_rsa_pubkey = self.asn1_to_ssh_rsa(pubkey)
+        fileutil.write_file(output_file, ssh_rsa_pubkey)
+
+    #Override
+    def get_dhcp_pid(self):
+        ret= shellutil.run_get_output("pidof dhclient")
+        return ret[1] if ret[0] == 0 else None
+
+class RedhatOSUtil(Redhat6xOSUtil):
+    def __init__(self):
+        super(RedhatOSUtil, self).__init__()
+
+    def set_hostname(self, hostname):
+        super(RedhatOSUtil, self).set_hostname(hostname)
+        fileutil.update_conf_file('/etc/sysconfig/network',
+                                  'HOSTNAME',
+                                  'HOSTNAME={0}'.format(hostname))
+
+    def set_dhcp_hostname(self, hostname):
+        ifname = self.get_if_name()
+        filepath = "/etc/sysconfig/network-scripts/ifcfg-{0}".format(ifname)
+        fileutil.update_conf_file(filepath,
+                                  'DHCP_HOSTNAME',
+                                  'DHCP_HOSTNAME={0}'.format(hostname))
+
+    def register_agent_service(self):
+        return shellutil.run("systemctl enable waagent", chk_err=False)
+
+    def unregister_agent_service(self):
+        return shellutil.run("systemctl disable waagent", chk_err=False)
+
+