aboutsummaryrefslogtreecommitdiffstats
path: root/lib/crypto/c_src/crypto.c
diff options
context:
space:
mode:
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/c_src/crypto.c
parent07b8f441ca711f9812fad9e9115bab3c3aa92f79 (diff)
downloadotp-4237524a0d3eb26c244e78539de84c78b828c3c3.tar.gz
otp-4237524a0d3eb26c244e78539de84c78b828c3c3.tar.bz2
otp-4237524a0d3eb26c244e78539de84c78b828c3c3.zip
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/c_src/crypto.c')
-rw-r--r--lib/crypto/c_src/crypto.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/lib/crypto/c_src/crypto.c b/lib/crypto/c_src/crypto.c
index fca08c4eed..3020cadc56 100644
--- a/lib/crypto/c_src/crypto.c
+++ b/lib/crypto/c_src/crypto.c
@@ -215,6 +215,7 @@ static ERL_NIF_TERM des_cfb_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM a
static ERL_NIF_TERM des_ecb_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM des_ede3_cbc_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM des_ede3_cfb_crypt_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM aes_cfb_8_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM aes_cfb_128_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM aes_ctr_encrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM aes_ctr_stream_encrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
@@ -344,6 +345,7 @@ static ErlNifFunc nif_funcs[] = {
{"des_ecb_crypt", 3, des_ecb_crypt},
{"des_ede3_cbc_crypt", 6, des_ede3_cbc_crypt},
{"des_ede3_cfb_crypt_nif", 6, des_ede3_cfb_crypt_nif},
+ {"aes_cfb_8_crypt", 4, aes_cfb_8_crypt},
{"aes_cfb_128_crypt", 4, aes_cfb_128_crypt},
{"aes_ctr_encrypt", 3, aes_ctr_encrypt},
{"aes_ctr_decrypt", 3, aes_ctr_encrypt},
@@ -1600,6 +1602,30 @@ static ERL_NIF_TERM des_ede3_cfb_crypt_nif(ErlNifEnv* env, int argc, const ERL_N
#endif
}
+static ERL_NIF_TERM aes_cfb_8_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Key, IVec, Data, IsEncrypt) */
+ ErlNifBinary key, ivec, text;
+ AES_KEY aes_key;
+ unsigned char ivec_clone[16]; /* writable copy */
+ int new_ivlen = 0;
+ ERL_NIF_TERM ret;
+
+ 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)) {
+ return enif_make_badarg(env);
+ }
+
+ memcpy(ivec_clone, ivec.data, 16);
+ AES_set_encrypt_key(key.data, 128, &aes_key);
+ AES_cfb8_encrypt((unsigned char *) text.data,
+ enif_make_new_binary(env, text.size, &ret),
+ text.size, &aes_key, ivec_clone, &new_ivlen,
+ (argv[3] == atom_true));
+ CONSUME_REDS(env,text);
+ return ret;
+}
+
static ERL_NIF_TERM aes_cfb_128_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{/* (Key, IVec, Data, IsEncrypt) */
ErlNifBinary key, ivec, text;