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authorYura Beznos <[email protected]>2013-08-13 19:00:00 +0400
committerHenrik Nord <[email protected]>2013-09-30 15:36:16 +0200
commit9f2cdf704fa0732817b4c49067cd561dd13ff730 (patch)
treec276add5ec76f39e222adb9f55ed5d1e439bf7cb /lib/crypto/c_src
parentb44a8d0e488be8ecbb018fbdb3926e129caf0ed0 (diff)
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crypto: Add IGE mode for AES
Diffstat (limited to 'lib/crypto/c_src')
-rw-r--r--lib/crypto/c_src/crypto.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/lib/crypto/c_src/crypto.c b/lib/crypto/c_src/crypto.c
index c28ff8136c..5caa47bcf4 100644
--- a/lib/crypto/c_src/crypto.c
+++ b/lib/crypto/c_src/crypto.c
@@ -221,6 +221,7 @@ static ERL_NIF_TERM mod_exp_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM arg
static ERL_NIF_TERM dss_verify_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM rsa_verify_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM aes_cbc_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM aes_ige_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM do_exor(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM rc4_encrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM rc4_set_key(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
@@ -349,6 +350,7 @@ static ErlNifFunc nif_funcs[] = {
{"dss_verify_nif", 4, dss_verify_nif},
{"rsa_verify_nif", 4, rsa_verify_nif},
{"aes_cbc_crypt", 4, aes_cbc_crypt},
+ {"aes_ige_crypt", 4, aes_ige_crypt},
{"do_exor", 2, do_exor},
{"rc4_encrypt", 2, rc4_encrypt},
{"rc4_set_key", 1, rc4_set_key},
@@ -2090,6 +2092,41 @@ static ERL_NIF_TERM aes_cbc_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM a
return ret;
}
+static ERL_NIF_TERM aes_ige_crypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Key, IVec, Data, IsEncrypt) */
+ ErlNifBinary key_bin, ivec_bin, data_bin;
+ AES_KEY aes_key;
+ unsigned char ivec[32];
+ int i;
+ unsigned char* ret_ptr;
+ ERL_NIF_TERM ret;
+
+ if (!enif_inspect_iolist_as_binary(env, argv[0], &key_bin)
+ || (key_bin.size != 16 && key_bin.size != 32)
+ || !enif_inspect_binary(env, argv[1], &ivec_bin)
+ || ivec_bin.size != 32
+ || !enif_inspect_iolist_as_binary(env, argv[2], &data_bin)
+ || data_bin.size % 16 != 0) {
+
+ return enif_make_badarg(env);
+ }
+
+ if (argv[3] == atom_true) {
+ i = AES_ENCRYPT;
+ AES_set_encrypt_key(key_bin.data, key_bin.size*8, &aes_key);
+ }
+ else {
+ i = AES_DECRYPT;
+ AES_set_decrypt_key(key_bin.data, key_bin.size*8, &aes_key);
+ }
+
+ ret_ptr = enif_make_new_binary(env, data_bin.size, &ret);
+ memcpy(ivec, ivec_bin.data, 32); /* writable copy */
+ AES_ige_encrypt(data_bin.data, ret_ptr, data_bin.size, &aes_key, ivec, i);
+ CONSUME_REDS(env,data_bin);
+ return ret;
+}
+
static ERL_NIF_TERM do_exor(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{/* (Data1, Data2) */
ErlNifBinary d1, d2;