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authorBernard Duggan <[email protected]>2014-03-31 19:58:35 +1100
committerBernard Duggan <[email protected]>2014-04-29 22:31:49 +1000
commit4237524a0d3eb26c244e78539de84c78b828c3c3 (patch)
treecce719556ab93d46e7e2689f761844ec8193907e /lib/crypto/src
parent07b8f441ca711f9812fad9e9115bab3c3aa92f79 (diff)
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Add AES-CBF8 cypher to crypto module
This adds the aes_cfb8 cypher type (and associated tests and documentation) to the crypto module.
Diffstat (limited to 'lib/crypto/src')
-rw-r--r--lib/crypto/src/crypto.erl26
1 files changed, 22 insertions, 4 deletions
diff --git a/lib/crypto/src/crypto.erl b/lib/crypto/src/crypto.erl
index 5bf52fc8a4..e1fbbf9ab8 100644
--- a/lib/crypto/src/crypto.erl
+++ b/lib/crypto/src/crypto.erl
@@ -210,7 +210,7 @@ supports()->
[{hashs, Hashs},
{ciphers, [des_cbc, des_cfb, des3_cbc, des_ede3, blowfish_cbc,
- blowfish_cfb64, blowfish_ofb64, blowfish_ecb, aes_cbc128, aes_cfb128,
+ blowfish_cfb64, blowfish_ofb64, blowfish_ecb, aes_cbc128, aes_cfb8, aes_cfb128,
aes_cbc256, rc2_cbc, aes_ctr, rc4] ++ Ciphers},
{public_keys, [rsa, dss, dh, srp] ++ PubKeys}
].
@@ -281,7 +281,7 @@ hmac_final_n(_Context, _HashLen) -> ? nif_stub.
%% Ecrypt/decrypt %%%
-spec block_encrypt(des_cbc | des_cfb | des3_cbc | des3_cbf | des_ede3 | blowfish_cbc |
- blowfish_cfb64 | aes_cbc128 | aes_cfb128 | aes_cbc256 | rc2_cbc,
+ blowfish_cfb64 | aes_cbc128 | aes_cfb8 | aes_cfb128 | aes_cbc256 | rc2_cbc,
Key::iodata(), Ivec::binary(), Data::iodata()) -> binary().
block_encrypt(des_cbc, Key, Ivec, Data) ->
@@ -306,6 +306,8 @@ block_encrypt(aes_cbc256, Key, Ivec, Data) ->
aes_cbc_256_encrypt(Key, Ivec, Data);
block_encrypt(aes_ige256, Key, Ivec, Data) ->
aes_ige_256_encrypt(Key, Ivec, Data);
+block_encrypt(aes_cfb8, Key, Ivec, Data) ->
+ aes_cfb_8_encrypt(Key, Ivec, Data);
block_encrypt(aes_cfb128, Key, Ivec, Data) ->
aes_cfb_128_encrypt(Key, Ivec, Data);
block_encrypt(rc2_cbc, Key, Ivec, Data) ->
@@ -313,7 +315,7 @@ block_encrypt(rc2_cbc, Key, Ivec, Data) ->
-spec block_decrypt(des_cbc | des_cfb | des3_cbc | des3_cbf | des_ede3 | blowfish_cbc |
blowfish_cfb64 | blowfish_ofb64 | aes_cbc128 | aes_cbc256 | aes_ige256 |
- aes_cfb128 | rc2_cbc,
+ aes_cfb8 | aes_cfb128 | rc2_cbc,
Key::iodata(), Ivec::binary(), Data::iodata()) -> binary().
block_decrypt(des_cbc, Key, Ivec, Data) ->
@@ -338,6 +340,8 @@ block_decrypt(aes_cbc256, Key, Ivec, Data) ->
aes_cbc_256_decrypt(Key, Ivec, Data);
block_decrypt(aes_ige256, Key, Ivec, Data) ->
aes_ige_256_decrypt(Key, Ivec, Data);
+block_decrypt(aes_cfb8, Key, Ivec, Data) ->
+ aes_cfb_8_decrypt(Key, Ivec, Data);
block_decrypt(aes_cfb128, Key, Ivec, Data) ->
aes_cfb_128_decrypt(Key, Ivec, Data);
block_decrypt(rc2_cbc, Key, Ivec, Data) ->
@@ -1159,7 +1163,21 @@ blowfish_ofb64_encrypt(_Key, _IVec, _Data) -> ?nif_stub.
%%
-%% AES in cipher feedback mode (CFB)
+%% AES in cipher feedback mode (CFB) - 8 bit shift
+%%
+-spec aes_cfb_8_encrypt(iodata(), binary(), iodata()) -> binary().
+-spec aes_cfb_8_decrypt(iodata(), binary(), iodata()) -> binary().
+
+aes_cfb_8_encrypt(Key, IVec, Data) ->
+ aes_cfb_8_crypt(Key, IVec, Data, true).
+
+aes_cfb_8_decrypt(Key, IVec, Data) ->
+ aes_cfb_8_crypt(Key, IVec, Data, false).
+
+aes_cfb_8_crypt(_Key, _IVec, _Data, _IsEncrypt) -> ?nif_stub.
+
+%%
+%% AES in cipher feedback mode (CFB) - 128 bit shift
%%
-spec aes_cfb_128_encrypt(iodata(), binary(), iodata()) -> binary().
-spec aes_cfb_128_decrypt(iodata(), binary(), iodata()) -> binary().