From 6faad239766accdcc007540f0b8b38d4709cd435 Mon Sep 17 00:00:00 2001 From: Sverker Eriksson Date: Wed, 4 Jul 2012 17:26:29 +0200 Subject: crypto: Allow aes_cfb_128_{en|de}crypt to accept unaligned data Remove the need for padding up to 16-byte multiple. --- lib/crypto/test/crypto_SUITE.erl | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) (limited to 'lib/crypto/test') diff --git a/lib/crypto/test/crypto_SUITE.erl b/lib/crypto/test/crypto_SUITE.erl index 627c966dfb..196f00da5d 100644 --- a/lib/crypto/test/crypto_SUITE.erl +++ b/lib/crypto/test/crypto_SUITE.erl @@ -717,10 +717,19 @@ aes_cfb(Config) when is_list(Config) -> ?line Key = hexstr2bin("2b7e151628aed2a6abf7158809cf4f3c"), ?line IVec = hexstr2bin("000102030405060708090a0b0c0d0e0f"), ?line Plain = hexstr2bin("6bc1bee22e409f96e93d7e117393172a"), - ?line Cipher = crypto:aes_cfb_128_encrypt(Key, IVec, Plain), - ?line m(Cipher, hexstr2bin("3b3fd92eb72dad20333449f8e83cfb4a")), - ?line m(Plain, - crypto:aes_cfb_128_decrypt(Key, IVec, Cipher)). + ?line Cipher = hexstr2bin("3b3fd92eb72dad20333449f8e83cfb4a"), + + %% Try all prefixes of plain and cipher. + aes_cfb_do(byte_size(Plain), Plain, Cipher, Key, IVec). + +aes_cfb_do(N, Plain, Cipher, Key, IVec) when N >= 0 -> + <> = Plain, + <> = Cipher, + ?line C = crypto:aes_cfb_128_encrypt(Key, IVec, P), + ?line P = crypto:aes_cfb_128_decrypt(Key, IVec, C), + aes_cfb_do(N-1, Plain, Cipher, Key, IVec); +aes_cfb_do(_, _, _, _, _) -> ok. + %% %% -- cgit v1.2.3