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| author | Paul Guyot <[email protected]> | 2011-09-06 14:38:39 +0200 |
|---|---|---|
| committer | Sverker Eriksson <[email protected]> | 2011-10-18 15:36:09 +0200 |
| commit | f0db3eff30b298e765a9af78a86f4865cad21da8 (patch) | |
| tree | b78c8a7fc56dbcc20fd897a09b339c4e665c5be0 /lib/crypto/src | |
| parent | 69d71bef9ce00c0982fc2a92adcad40b3968e166 (diff) | |
| download | otp-f0db3eff30b298e765a9af78a86f4865cad21da8.tar.gz otp-f0db3eff30b298e765a9af78a86f4865cad21da8.tar.bz2 otp-f0db3eff30b298e765a9af78a86f4865cad21da8.zip | |
[crypto] Add DES and Triple DES cipher feedback (CFB) mode functions
Diffstat (limited to 'lib/crypto/src')
| -rw-r--r-- | lib/crypto/src/crypto.erl | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/lib/crypto/src/crypto.erl b/lib/crypto/src/crypto.erl index c35dfcebab..862f3df0f8 100644 --- a/lib/crypto/src/crypto.erl +++ b/lib/crypto/src/crypto.erl @@ -31,7 +31,9 @@ -export([hmac_init/2, hmac_update/2, hmac_final/1, hmac_final_n/2]). -export([des_cbc_encrypt/3, des_cbc_decrypt/3, des_cbc_ivec/1]). -export([des_ecb_encrypt/2, des_ecb_decrypt/2]). +-export([des_cfb_encrypt/3, des_cfb_decrypt/3, des_cfb_ivec/2]). -export([des3_cbc_encrypt/5, des3_cbc_decrypt/5]). +-export([des3_cfb_encrypt/5, des3_cfb_decrypt/5]). -export([blowfish_ecb_encrypt/2, blowfish_ecb_decrypt/2]). -export([blowfish_cbc_encrypt/3, blowfish_cbc_decrypt/3]). -export([blowfish_cfb64_encrypt/3, blowfish_cfb64_decrypt/3]). @@ -68,8 +70,10 @@ sha_mac, sha_mac_96, sha_mac_init, sha_mac_update, sha_mac_final, des_cbc_encrypt, des_cbc_decrypt, + des_cfb_encrypt, des_cfb_decrypt, des_ecb_encrypt, des_ecb_decrypt, des_ede3_cbc_encrypt, des_ede3_cbc_decrypt, + des_ede3_cfb_encrypt, des_ede3_cfb_decrypt, aes_cfb_128_encrypt, aes_cfb_128_decrypt, rand_bytes, strong_rand_bytes, @@ -294,6 +298,33 @@ des_cbc_ivec(Data) when is_list(Data) -> des_cbc_ivec(list_to_binary(Data)). %% +%% DES - in 8-bits cipher feedback mode (CFB) +%% +-spec des_cfb_encrypt(iodata(), binary(), iodata()) -> binary(). +-spec des_cfb_decrypt(iodata(), binary(), iodata()) -> binary(). + +des_cfb_encrypt(Key, IVec, Data) -> + des_cfb_crypt(Key, IVec, Data, true). + +des_cfb_decrypt(Key, IVec, Data) -> + des_cfb_crypt(Key, IVec, Data, false). + +des_cfb_crypt(_Key, _IVec, _Data, _IsEncrypt) -> ?nif_stub. + +%% +%% dec_cfb_ivec(IVec, Data) -> binary() +%% +%% Returns the IVec to be used in the next iteration of +%% des_cfb_[encrypt|decrypt]. +%% +-spec des_cfb_ivec(iodata(), iodata()) -> binary(). + +des_cfb_ivec(IVec, Data) -> + IVecAndData = list_to_binary([IVec, Data]), + {_, NewIVec} = split_binary(IVecAndData, byte_size(IVecAndData) - 8), + NewIVec. + +%% %% DES - in electronic codebook mode (ECB) %% -spec des_ecb_encrypt(iodata(), iodata()) -> binary(). @@ -326,6 +357,26 @@ des_ede3_cbc_decrypt(Key1, Key2, Key3, IVec, Data) -> des_ede3_cbc_crypt(_Key1, _Key2, _Key3, _IVec, _Data, _IsEncrypt) -> ?nif_stub. %% +%% DES3 - in 8-bits cipher feedback mode (CFB) +%% +-spec des3_cfb_encrypt(iodata(), iodata(), iodata(), binary(), iodata()) -> + binary(). +-spec des3_cfb_decrypt(iodata(), iodata(), iodata(), binary(), iodata()) -> + binary(). + +des3_cfb_encrypt(Key1, Key2, Key3, IVec, Data) -> + des_ede3_cfb_encrypt(Key1, Key2, Key3, IVec, Data). +des_ede3_cfb_encrypt(Key1, Key2, Key3, IVec, Data) -> + des_ede3_cfb_crypt(Key1, Key2, Key3, IVec, Data, true). + +des3_cfb_decrypt(Key1, Key2, Key3, IVec, Data) -> + des_ede3_cfb_decrypt(Key1, Key2, Key3, IVec, Data). +des_ede3_cfb_decrypt(Key1, Key2, Key3, IVec, Data) -> + des_ede3_cfb_crypt(Key1, Key2, Key3, IVec, Data, false). + +des_ede3_cfb_crypt(_Key1, _Key2, _Key3, _IVec, _Data, _IsEncrypt) -> ?nif_stub. + +%% %% Blowfish %% -spec blowfish_ecb_encrypt(iodata(), iodata()) -> binary(). |