1 files changed, 27 insertions, 0 deletions
diff --git a/chromium/third_party/tlslite/tlslite/utils/tripledes.py b/chromium/third_party/tlslite/tlslite/utils/tripledes.py
new file mode 100644
index 00000000000..0b4d07592f8
--- /dev/null
+++ b/chromium/third_party/tlslite/tlslite/utils/tripledes.py
@@ -0,0 +1,27 @@
+# Author: Trevor Perrin
+# See the LICENSE file for legal information regarding use of this file.
+
+"""Abstract class for 3DES."""
+
+class TripleDES(object):
+    def __init__(self, key, mode, IV, implementation):
+        if len(key) != 24:
+            raise ValueError()
+        if mode != 2:
+            raise ValueError()
+        if len(IV) != 8:
+            raise ValueError()
+        self.isBlockCipher = True
+        self.block_size = 8
+        self.implementation = implementation
+        self.name = "3des"
+
+    #CBC-Mode encryption, returns ciphertext
+    #WARNING: *MAY* modify the input as well
+    def encrypt(self, plaintext):
+        assert(len(plaintext) % 8 == 0)
+
+    #CBC-Mode decryption, returns plaintext
+    #WARNING: *MAY* modify the input as well
+    def decrypt(self, ciphertext):
+        assert(len(ciphertext) % 8 == 0)