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-rw-r--r--lib/crypto/c_src/crypto.c54
1 files changed, 54 insertions, 0 deletions
diff --git a/lib/crypto/c_src/crypto.c b/lib/crypto/c_src/crypto.c
index d0044fe723..ce149aa96a 100644
--- a/lib/crypto/c_src/crypto.c
+++ b/lib/crypto/c_src/crypto.c
@@ -108,6 +108,7 @@
#if OPENSSL_VERSION_NUMBER >= OpenSSL_version_plain(1,0,1)
# define HAVE_EVP_AES_CTR
# define HAVE_GCM
+# define HAVE_CMAC
# if OPENSSL_VERSION_NUMBER < OpenSSL_version(1,0,1,'d')
# define HAVE_GCM_EVP_DECRYPT_BUG
# endif
@@ -121,6 +122,10 @@
# define HAVE_ECB_IVEC_BUG
#endif
+#if defined(HAVE_CMAC)
+#include <openssl/cmac.h>
+#endif
+
#if defined(HAVE_EC)
#include <openssl/ec.h>
#include <openssl/ecdh.h>
@@ -224,6 +229,7 @@ static ERL_NIF_TERM hmac_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]
static ERL_NIF_TERM hmac_init_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM hmac_update_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM hmac_final_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
+static ERL_NIF_TERM cmac_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM block_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_ige_crypt_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
@@ -294,6 +300,7 @@ static ErlNifFunc nif_funcs[] = {
{"hmac_update_nif", 2, hmac_update_nif},
{"hmac_final_nif", 1, hmac_final_nif},
{"hmac_final_nif", 2, hmac_final_nif},
+ {"cmac_nif", 3, cmac_nif},
{"block_crypt_nif", 5, block_crypt_nif},
{"block_crypt_nif", 4, block_crypt_nif},
{"aes_ige_crypt_nif", 4, aes_ige_crypt_nif},
@@ -1346,6 +1353,53 @@ static ERL_NIF_TERM hmac_final_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM
return ret;
}
+static ERL_NIF_TERM cmac_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Type, Key, Data) */
+#if defined(HAVE_CMAC)
+ struct cipher_type_t *cipherp = NULL;
+ const EVP_CIPHER *cipher;
+ CMAC_CTX *ctx;
+ ErlNifBinary key;
+ ErlNifBinary data;
+ ERL_NIF_TERM ret;
+ size_t ret_size;
+
+ if (!enif_inspect_iolist_as_binary(env, argv[1], &key)
+ || !(cipherp = get_cipher_type(argv[0], key.size))
+ || !enif_inspect_iolist_as_binary(env, argv[2], &data)) {
+ return enif_make_badarg(env);
+ }
+ cipher = cipherp->cipher.p;
+ if (!cipher) {
+ return enif_raise_exception(env, atom_notsup);
+ }
+
+ ctx = CMAC_CTX_new();
+ if (!CMAC_Init(ctx, key.data, key.size, cipher, NULL)) {
+ CMAC_CTX_free(ctx);
+ return atom_notsup;
+ }
+
+ if (!CMAC_Update(ctx, data.data, data.size) ||
+ !CMAC_Final(ctx,
+ enif_make_new_binary(env, EVP_CIPHER_block_size(cipher), &ret),
+ &ret_size)) {
+ CMAC_CTX_free(ctx);
+ return atom_notsup;
+ }
+ ASSERT(ret_size == (unsigned)EVP_CIPHER_block_size(cipher));
+
+ CMAC_CTX_free(ctx);
+ CONSUME_REDS(env, data);
+ return ret;
+#else
+ /* The CMAC functionality was introduced in OpenSSL 1.0.1
+ * Although OTP requires at least version 0.9.8, the versions 0.9.8 and 1.0.0 are
+ * no longer maintained. */
+ return atom_notsup;
+#endif
+}
+
static ERL_NIF_TERM block_crypt_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{/* (Type, Key, Ivec, Text, IsEncrypt) or (Type, Key, Text, IsEncrypt) */
struct cipher_type_t *cipherp = NULL;