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-rw-r--r--lib/crypto/c_src/aead.c233
1 files changed, 233 insertions, 0 deletions
diff --git a/lib/crypto/c_src/aead.c b/lib/crypto/c_src/aead.c
new file mode 100644
index 0000000000..b7ed06e3bc
--- /dev/null
+++ b/lib/crypto/c_src/aead.c
@@ -0,0 +1,233 @@
+/*
+ * %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 "aead.h"
+#include "aes.h"
+
+ERL_NIF_TERM aead_encrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Type,Key,Iv,AAD,In) */
+#if defined(HAVE_AEAD)
+ EVP_CIPHER_CTX *ctx;
+ const EVP_CIPHER *cipher = NULL;
+ ErlNifBinary key, iv, aad, in;
+ unsigned int tag_len;
+ unsigned char *outp, *tagp;
+ ERL_NIF_TERM type, out, out_tag;
+ int len, ctx_ctrl_set_ivlen, ctx_ctrl_get_tag;
+
+ type = argv[0];
+
+ if (!enif_is_atom(env, type)
+ || !enif_inspect_iolist_as_binary(env, argv[1], &key)
+ || !enif_inspect_binary(env, argv[2], &iv)
+ || !enif_inspect_iolist_as_binary(env, argv[3], &aad)
+ || !enif_inspect_iolist_as_binary(env, argv[4], &in)
+ || !enif_get_uint(env, argv[5], &tag_len)) {
+ return enif_make_badarg(env);
+ }
+
+ /* Use cipher_type some day. Must check block_encrypt|decrypt first */
+#if defined(HAVE_GCM)
+ if (type == atom_aes_gcm) {
+ if ((iv.size > 0)
+ && (1 <= tag_len && tag_len <= 16)) {
+ ctx_ctrl_set_ivlen = EVP_CTRL_GCM_SET_IVLEN;
+ ctx_ctrl_get_tag = EVP_CTRL_GCM_GET_TAG;
+ if (key.size == 16) cipher = EVP_aes_128_gcm();
+ else if (key.size == 24) cipher = EVP_aes_192_gcm();
+ else if (key.size == 32) cipher = EVP_aes_256_gcm();
+ else enif_make_badarg(env);
+ } else
+ enif_make_badarg(env);
+ } else
+#endif
+#if defined(HAVE_CCM)
+ if (type == atom_aes_ccm) {
+ if ((7 <= iv.size && iv.size <= 13)
+ && (4 <= tag_len && tag_len <= 16)
+ && ((tag_len & 1) == 0)
+ ) {
+ ctx_ctrl_set_ivlen = EVP_CTRL_CCM_SET_IVLEN;
+ ctx_ctrl_get_tag = EVP_CTRL_CCM_GET_TAG;
+ if (key.size == 16) cipher = EVP_aes_128_ccm();
+ else if (key.size == 24) cipher = EVP_aes_192_ccm();
+ else if (key.size == 32) cipher = EVP_aes_256_ccm();
+ else enif_make_badarg(env);
+ } else
+ enif_make_badarg(env);
+ } else
+#endif
+#if defined(HAVE_CHACHA20_POLY1305)
+ if (type == atom_chacha20_poly1305) {
+ if ((key.size == 32)
+ && (1 <= iv.size && iv.size <= 16)
+ && (tag_len == 16)
+ ) {
+ ctx_ctrl_set_ivlen = EVP_CTRL_AEAD_SET_IVLEN;
+ ctx_ctrl_get_tag = EVP_CTRL_AEAD_GET_TAG,
+ cipher = EVP_chacha20_poly1305();
+ } else enif_make_badarg(env);
+ } else
+#endif
+ return enif_raise_exception(env, atom_notsup);
+
+ ctx = EVP_CIPHER_CTX_new();
+ if (EVP_EncryptInit_ex(ctx, cipher, NULL, NULL, NULL) != 1) goto out_err;
+ if (EVP_CIPHER_CTX_ctrl(ctx, ctx_ctrl_set_ivlen, iv.size, NULL) != 1) goto out_err;
+
+#if defined(HAVE_CCM)
+ if (type == atom_aes_ccm) {
+ if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_SET_TAG, tag_len, NULL) != 1) goto out_err;
+ if (EVP_EncryptInit_ex(ctx, NULL, NULL, key.data, iv.data) != 1) goto out_err;
+ if (EVP_EncryptUpdate(ctx, NULL, &len, NULL, in.size) != 1) goto out_err;
+ } else
+#endif
+ if (EVP_EncryptInit_ex(ctx, NULL, NULL, key.data, iv.data) != 1) goto out_err;
+
+ if (EVP_EncryptUpdate(ctx, NULL, &len, aad.data, aad.size) != 1) goto out_err;
+
+ outp = enif_make_new_binary(env, in.size, &out);
+
+ if (EVP_EncryptUpdate(ctx, outp, &len, in.data, in.size) != 1) goto out_err;
+ if (EVP_EncryptFinal_ex(ctx, outp/*+len*/, &len) != 1) goto out_err;
+
+ tagp = enif_make_new_binary(env, tag_len, &out_tag);
+
+ if (EVP_CIPHER_CTX_ctrl(ctx, ctx_ctrl_get_tag, tag_len, tagp) != 1) goto out_err;
+
+ EVP_CIPHER_CTX_free(ctx);
+ CONSUME_REDS(env, in);
+ return enif_make_tuple2(env, out, out_tag);
+
+out_err:
+ EVP_CIPHER_CTX_free(ctx);
+ return atom_error;
+
+#else
+ return enif_raise_exception(env, atom_notsup);
+#endif
+}
+
+ERL_NIF_TERM aead_decrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+{/* (Type,Key,Iv,AAD,In,Tag) */
+#if defined(HAVE_AEAD)
+ EVP_CIPHER_CTX *ctx;
+ const EVP_CIPHER *cipher = NULL;
+ ErlNifBinary key, iv, aad, in, tag;
+ unsigned char *outp;
+ ERL_NIF_TERM type, out;
+ int len, ctx_ctrl_set_ivlen, ctx_ctrl_set_tag;
+
+ type = argv[0];
+#if defined(HAVE_GCM_EVP_DECRYPT_BUG)
+ if (type == atom_aes_gcm)
+ return aes_gcm_decrypt_NO_EVP(env, argc, argv);
+#endif
+
+ if (!enif_is_atom(env, type)
+ || !enif_inspect_iolist_as_binary(env, argv[1], &key)
+ || !enif_inspect_binary(env, argv[2], &iv)
+ || !enif_inspect_iolist_as_binary(env, argv[3], &aad)
+ || !enif_inspect_iolist_as_binary(env, argv[4], &in)
+ || !enif_inspect_iolist_as_binary(env, argv[5], &tag)) {
+ return enif_make_badarg(env);
+ }
+
+ /* Use cipher_type some day. Must check block_encrypt|decrypt first */
+#if defined(HAVE_GCM)
+ if (type == atom_aes_gcm) {
+ if (iv.size > 0) {
+ ctx_ctrl_set_ivlen = EVP_CTRL_GCM_SET_IVLEN;
+ ctx_ctrl_set_tag = EVP_CTRL_GCM_SET_TAG;
+ if (key.size == 16) cipher = EVP_aes_128_gcm();
+ else if (key.size == 24) cipher = EVP_aes_192_gcm();
+ else if (key.size == 32) cipher = EVP_aes_256_gcm();
+ else enif_make_badarg(env);
+ } else
+ enif_make_badarg(env);
+ } else
+#endif
+#if defined(HAVE_CCM)
+ if (type == atom_aes_ccm) {
+ if (iv.size > 0) {
+ ctx_ctrl_set_ivlen = EVP_CTRL_CCM_SET_IVLEN;
+ if (key.size == 16) cipher = EVP_aes_128_ccm();
+ else if (key.size == 24) cipher = EVP_aes_192_ccm();
+ else if (key.size == 32) cipher = EVP_aes_256_ccm();
+ else enif_make_badarg(env);
+ } else
+ enif_make_badarg(env);
+ } else
+#endif
+#if defined(HAVE_CHACHA20_POLY1305)
+ if (type == atom_chacha20_poly1305) {
+ if ((key.size == 32)
+ && (1 <= iv.size && iv.size <= 16)
+ && tag.size == 16
+ ) {
+ ctx_ctrl_set_ivlen = EVP_CTRL_AEAD_SET_IVLEN;
+ ctx_ctrl_set_tag = EVP_CTRL_AEAD_SET_TAG;
+ cipher = EVP_chacha20_poly1305();
+ } else enif_make_badarg(env);
+ } else
+#endif
+ return enif_raise_exception(env, atom_notsup);
+
+ outp = enif_make_new_binary(env, in.size, &out);
+
+ ctx = EVP_CIPHER_CTX_new();
+ if (EVP_DecryptInit_ex(ctx, cipher, NULL, NULL, NULL) != 1) goto out_err;
+ if (EVP_CIPHER_CTX_ctrl(ctx, ctx_ctrl_set_ivlen, iv.size, NULL) != 1) goto out_err;
+
+#if defined(HAVE_CCM)
+ if (type == atom_aes_ccm) {
+ if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_CCM_SET_TAG, tag.size, tag.data) != 1) goto out_err;
+ }
+#endif
+
+ if (EVP_DecryptInit_ex(ctx, NULL, NULL, key.data, iv.data) != 1) goto out_err;
+
+#if defined(HAVE_CCM)
+ if (type == atom_aes_ccm) {
+ if (1 != EVP_DecryptUpdate(ctx, NULL, &len, NULL, in.size)) goto out_err;
+ }
+#endif
+
+ if (EVP_DecryptUpdate(ctx, NULL, &len, aad.data, aad.size) != 1) goto out_err;
+ if (EVP_DecryptUpdate(ctx, outp, &len, in.data, in.size) != 1) goto out_err;
+
+#if defined(HAVE_GCM) || defined(HAVE_CHACHA20_POLY1305)
+ if (type == atom_aes_gcm) {
+ if (EVP_CIPHER_CTX_ctrl(ctx, ctx_ctrl_set_tag, tag.size, tag.data) != 1) goto out_err;
+ if (EVP_DecryptFinal_ex(ctx, outp+len, &len) != 1) goto out_err;
+ }
+#endif
+ EVP_CIPHER_CTX_free(ctx);
+
+ CONSUME_REDS(env, in);
+ return out;
+
+out_err:
+ EVP_CIPHER_CTX_free(ctx);
+ return atom_error;
+#else
+ return enif_raise_exception(env, atom_notsup);
+#endif
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 02:13:59 +0000