fixes bug #467

add tpm interface to enigma 2
introduce a demo plugin for tpm usage in plugins to validate running on dream multimedia hardware to be used in plugins (see doc/TPM for further information)

1 files changed, 82 insertions, 0 deletions

diff --git a/lib/python/Plugins/DemoPlugins/TPMDemo/plugin.py b/lib/python/Plugins/DemoPlugins/TPMDemo/plugin.py
new file mode 100644
index 00000000..dafb2837
--- /dev/null
+++ b/lib/python/Plugins/DemoPlugins/TPMDemo/plugin.py
@@ -0,0 +1,82 @@
+from Screens.Screen import Screen
+from Plugins.Plugin import PluginDescriptor
+from enigma import eTPM
+import sha
+
+def bin2long(s):
+	return reduce( lambda x,y:(x<<8L)+y, map(ord, s))
+
+def long2bin(l):
+	res = ""
+	for byte in range(128):
+		res += chr((l >> (1024 - (byte + 1) * 8)) & 0xff)
+	return res
+
+def rsa_pub1024(src, mod):
+	return long2bin(pow(bin2long(src), 65537, bin2long(mod)))
+	
+def decrypt_block(src, mod):
+	if len(src) != 128 and len(src) != 202:
+		return None
+	dest = rsa_pub1024(src[:128], mod)
+	hash = sha.new(dest[1:107])
+	if len(src) == 202:
+		hash.update(src[131:192])	
+	result = hash.digest()
+	if result == dest[107:127]:
+		return dest
+	return None
+
+def validate_cert(cert, key):
+	buf = decrypt_block(cert[8:], key) 
+	if buf is None:
+		return None
+	return buf[36:107] + cert[139:196]
+
+def read_random():
+	try:
+		fd = open("/dev/urandom", "r")
+		buf = fd.read(8)
+		fd.close()
+		return buf
+	except:
+		return None
+
+def main(session, **kwargs):
+	rootkey = ['\x9f', '|', '\xe4', 'G', '\xc9', '\xb4', '\xf4', '#', '&', '\xce', '\xb3', '\xfe', '\xda', '\xc9', 'U', '`', '\xd8', '\x8c', 's', 'o', '\x90', '\x9b', '\\', 'b', '\xc0', '\x89', '\xd1', '\x8c', '\x9e', 'J', 'T', '\xc5', 'X', '\xa1', '\xb8', '\x13', '5', 'E', '\x02', '\xc9', '\xb2', '\xe6', 't', '\x89', '\xde', '\xcd', '\x9d', '\x11', '\xdd', '\xc7', '\xf4', '\xe4', '\xe4', '\xbc', '\xdb', '\x9c', '\xea', '}', '\xad', '\xda', 't', 'r', '\x9b', '\xdc', '\xbc', '\x18', '3', '\xe7', '\xaf', '|', '\xae', '\x0c', '\xe3', '\xb5', '\x84', '\x8d', '\r', '\x8d', '\x9d', '2', '\xd0', '\xce', '\xd5', 'q', '\t', '\x84', 'c', '\xa8', ')', '\x99', '\xdc', '<', '"', 'x', '\xe8', '\x87', '\x8f', '\x02', ';', 'S', 'm', '\xd5', '\xf0', '\xa3', '_', '\xb7', 'T', '\t', '\xde', '\xa7', '\xf1', '\xc9', '\xae', '\x8a', '\xd7', '\xd2', '\xcf', '\xb2', '.', '\x13', '\xfb', '\xac', 'j', '\xdf', '\xb1', '\x1d', ':', '?']
+	
+	etpm = eTPM()
+	l2cert = etpm.getCert(eTPM.TPMD_DT_LEVEL2_CERT)
+	if l2cert is None:
+		print "l2cert not found"
+		return
+
+	l2key = validate_cert(l2cert, rootkey)
+	if l2key is None:
+		print "l2cert invalid"
+		return
+	
+	l3cert = etpm.getCert(eTPM.TPMD_DT_LEVEL3_CERT)
+	if l3cert is None:
+		print "l3cert not found (can be fixed by running the genuine dreambox plugin and running the offered update)"
+		return
+	
+	l3key = validate_cert(l3cert, l2key)
+	if l3key is None:
+		print "l3cert invalid"
+		return
+	
+	rnd = read_random()
+	if rnd is None:
+		print "random error"
+		return
+	val = etpm.challenge(rnd)
+	result = decrypt_block(val, l3key)
+	if result[80:88] == rnd:
+		print "successfully finished the tpm test"
+		# would start your plugin here
+
+def Plugins(**kwargs):
+	return [PluginDescriptor(name = "TPM Demo", description = _("A demo plugin for TPM usage."), where = PluginDescriptor.WHERE_EXTENSIONSMENU, fnc = main),
+		PluginDescriptor(name = "TPM Demo", description = _("A demo plugin for TPM usage."), icon = "plugin.png", where = PluginDescriptor.WHERE_PLUGINMENU, fnc = main)]
+	
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