diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/crypto/c_src/crypto.c | 3 | ||||
| -rw-r--r-- | lib/crypto/doc/src/crypto.xml | 42 | ||||
| -rw-r--r-- | lib/crypto/test/crypto_SUITE.erl | 17 |
3 files changed, 49 insertions, 13 deletions
diff --git a/lib/crypto/c_src/crypto.c b/lib/crypto/c_src/crypto.c index 4be593e208..a6a81d6fe2 100644 --- a/lib/crypto/c_src/crypto.c +++ b/lib/crypto/c_src/crypto.c @@ -954,8 +954,7 @@ static ERL_NIF_TERM aes_cfb_128_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TE if (!enif_inspect_iolist_as_binary(env, argv[0], &key) || key.size != 16 || !enif_inspect_binary(env, argv[1], &ivec) || ivec.size != 16 - || !enif_inspect_iolist_as_binary(env, argv[2], &text) - || text.size % 16 != 0) { + || !enif_inspect_iolist_as_binary(env, argv[2], &text)) { return enif_make_badarg(env); } diff --git a/lib/crypto/doc/src/crypto.xml b/lib/crypto/doc/src/crypto.xml index 19db6c9dd4..2868fe05f0 100644 --- a/lib/crypto/doc/src/crypto.xml +++ b/lib/crypto/doc/src/crypto.xml @@ -643,16 +643,14 @@ Mpint() = <![CDATA[<<ByteLen:32/integer-big, Bytes:ByteLen/binary>>]]> <func> <name>aes_cfb_128_encrypt(Key, IVec, Text) -> Cipher</name> - <name>aes_cbc_128_encrypt(Key, IVec, Text) -> Cipher</name> - <fsummary>Encrypt <c>Text</c>according to AES in Cipher Feedback mode or Cipher Block Chaining mode</fsummary> + <fsummary>Encrypt <c>Text</c>according to AES in Cipher Feedback mode</fsummary> <type> <v>Key = Text = iolist() | binary()</v> <v>IVec = Cipher = binary()</v> </type> <desc> <p>Encrypts <c>Text</c> according to AES in Cipher Feedback - mode (CFB) or Cipher Block Chaining mode (CBC). <c>Text</c> - must be a multiple of 128 bits (16 bytes). <c>Key</c> is the + mode (CFB). <c>Key</c> is the AES key, and <c>IVec</c> is an arbitrary initializing vector. The lengths of <c>Key</c> and <c>IVec</c> must be 128 bits (16 bytes).</p> @@ -660,15 +658,45 @@ Mpint() = <![CDATA[<<ByteLen:32/integer-big, Bytes:ByteLen/binary>>]]> </func> <func> <name>aes_cfb_128_decrypt(Key, IVec, Cipher) -> Text</name> + <fsummary>Decrypt <c>Cipher</c>according to AES in Cipher Feedback mode</fsummary> + <type> + <v>Key = Cipher = iolist() | binary()</v> + <v>IVec = Text = binary()</v> + </type> + <desc> + <p>Decrypts <c>Cipher</c> according to AES in Cipher Feedback Mode (CFB). + <c>Key</c> is the AES key, and <c>IVec</c> is an arbitrary + initializing vector. <c>Key</c> and <c>IVec</c> must have + the same values as those used when encrypting. The lengths of + <c>Key</c> and <c>IVec</c> must be 128 bits (16 bytes).</p> + </desc> + </func> + <func> + <name>aes_cbc_128_encrypt(Key, IVec, Text) -> Cipher</name> + <fsummary>Encrypt <c>Text</c>according to AES in Cipher Block Chaining mode</fsummary> + <type> + <v>Key = Text = iolist() | binary()</v> + <v>IVec = Cipher = binary()</v> + </type> + <desc> + <p>Encrypts <c>Text</c> according to AES in Cipher Block Chaining + mode (CBC). <c>Text</c> + must be a multiple of 128 bits (16 bytes). <c>Key</c> is the + AES key, and <c>IVec</c> is an arbitrary initializing vector. + The lengths of <c>Key</c> and <c>IVec</c> must be 128 bits + (16 bytes).</p> + </desc> + </func> + <func> <name>aes_cbc_128_decrypt(Key, IVec, Cipher) -> Text</name> - <fsummary>Decrypt <c>Cipher</c>according to AES in Cipher Feedback mode or Cipher Block Chaining mode</fsummary> + <fsummary>Decrypt <c>Cipher</c>according to AES in Cipher Block Chaining mode</fsummary> <type> <v>Key = Cipher = iolist() | binary()</v> <v>IVec = Text = binary()</v> </type> <desc> - <p>Decrypts <c>Cipher</c> according to Cipher Feedback Mode (CFB) - or Cipher Block Chaining mode (CBC). + <p>Decrypts <c>Cipher</c> according to AES in Cipher Block + Chaining mode (CBC). <c>Key</c> is the AES key, and <c>IVec</c> is an arbitrary initializing vector. <c>Key</c> and <c>IVec</c> must have the same values as those used when encrypting. <c>Cipher</c> 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 -> + <<P:N/binary, _/binary>> = Plain, + <<C:N/binary, _/binary>> = 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. + %% %% |