propagate from branch 'net.randombit.botan.1_8' (head c5ae189464f6ef16e3ce73ea7c563412460d76a3)

            to branch 'net.randombit.botan' (head e2b95b6ad31c7539cf9ac0ebddb1d80bf63b5b21)

1 files changed, 44 insertions, 0 deletions

diff --git a/doc/python/cipher.py b/doc/python/cipher.py
new file mode 100755
index 000000000..1be2759ae
--- /dev/null
+++ b/doc/python/cipher.py
@@ -0,0 +1,44 @@
+#!/usr/bin/python
+
+import botan
+import sys
+
+def encrypt(input, passphrase):
+    rng = botan.RandomNumberGenerator()
+
+    # Use as both EAX IV and PBKDF2 salt
+    salt = rng.gen_random(10)
+
+    iterations = 10000
+    output_size = 16
+
+    key = botan.pbkdf2(passphrase, salt, iterations, output_size, "SHA-1")
+
+    encryptor = botan.Cipher("AES-128/EAX", "encrypt", key)
+
+    ciphertext = encryptor.cipher(input, salt)
+    return (ciphertext, salt)
+
+def decrypt(input, salt, passphrase):
+    iterations = 10000
+    output_size = 16
+
+    key = botan.pbkdf2(passphrase, salt, iterations, output_size, "SHA-1")
+
+    decryptor = botan.Cipher("AES-128/EAX", "decrypt", key)
+
+    return decryptor.cipher(input, salt)
+
+def main(args = None):
+    if args is None:
+        args = sys.argv
+
+    passphrase = args[1]
+    input = ''.join(open(args[2]).readlines())
+
+    (ciphertext, salt) = encrypt(input, passphrase)
+
+    print decrypt(ciphertext, salt, passphrase)
+
+if __name__ == '__main__':
+    sys.exit(main())