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-rw-r--r--lib/crypto/c_src/poly1305.c90
1 files changed, 90 insertions, 0 deletions
diff --git a/lib/crypto/c_src/poly1305.c b/lib/crypto/c_src/poly1305.c
new file mode 100644
index 0000000000..db3433dce3
--- /dev/null
+++ b/lib/crypto/c_src/poly1305.c
@@ -0,0 +1,90 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 2010-2018. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * %CopyrightEnd%
+ */
+
+#include "poly1305.h"
+
+/* For OpenSSL >= 1.1.1 the hmac_nif and cmac_nif could be integrated into poly1305 (with 'type' as parameter) */
+ERL_NIF_TERM poly1305_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Key, Text) */
+#ifdef HAVE_POLY1305
+ ErlNifBinary key_bin, text, ret_bin;
+ ERL_NIF_TERM ret;
+ EVP_PKEY *key = NULL;
+ EVP_MD_CTX *mctx = NULL;
+ EVP_PKEY_CTX *pctx = NULL;
+ const EVP_MD *md = NULL;
+ size_t size;
+ int ret_bin_alloc = 0;
+
+ ASSERT(argc == 2);
+
+ if (!enif_inspect_binary(env, argv[0], &key_bin))
+ goto bad_arg;
+ if (key_bin.size != 32)
+ goto bad_arg;
+ if (!enif_inspect_binary(env, argv[1], &text))
+ goto bad_arg;
+
+ if ((key = EVP_PKEY_new_raw_private_key(EVP_PKEY_POLY1305, /*engine*/ NULL, key_bin.data, key_bin.size)) == NULL)
+ goto err;
+
+ if ((mctx = EVP_MD_CTX_new()) == NULL)
+ goto err;
+ if (EVP_DigestSignInit(mctx, &pctx, md, /*engine*/ NULL, key) != 1)
+ goto err;
+ if (EVP_DigestSignUpdate(mctx, text.data, text.size) != 1)
+ goto err;
+
+ if (EVP_DigestSignFinal(mctx, NULL, &size) != 1)
+ goto err;
+ if (!enif_alloc_binary(size, &ret_bin))
+ goto err;
+ ret_bin_alloc = 1;
+ if (EVP_DigestSignFinal(mctx, ret_bin.data, &size) != 1)
+ goto err;
+
+ if (size != ret_bin.size) {
+ if (!enif_realloc_binary(&ret_bin, size))
+ goto err;
+ }
+
+ ret = enif_make_binary(env, &ret_bin);
+ ret_bin_alloc = 0;
+ goto done;
+
+ bad_arg:
+ return enif_make_badarg(env);
+
+ err:
+ if (ret_bin_alloc)
+ enif_release_binary(&ret_bin);
+ ret = atom_error;
+
+ done:
+ if (mctx)
+ EVP_MD_CTX_free(mctx);
+ if (key)
+ EVP_PKEY_free(key);
+ return ret;
+
+#else
+ return atom_notsup;
+#endif
+}