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/*
*
* Copyright 2018 gRPC authors.
*
* 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.
*
*/
#include <grpc/support/port_platform.h>
#include "src/core/tsi/alts/crypt/gsec.h"
#include <stdio.h>
#include <string.h>
#include <grpc/support/alloc.h>
static const char vtable_error_msg[] =
"crypter or crypter->vtable has not been initialized properly";
static void maybe_copy_error_msg(const char* src, char** dst) {
if (dst != nullptr && src != nullptr) {
*dst = static_cast<char*>(gpr_malloc(strlen(src) + 1));
memcpy(*dst, src, strlen(src) + 1);
}
}
grpc_status_code gsec_aead_crypter_encrypt(
gsec_aead_crypter* crypter, const uint8_t* nonce, size_t nonce_length,
const uint8_t* aad, size_t aad_length, const uint8_t* plaintext,
size_t plaintext_length, uint8_t* ciphertext_and_tag,
size_t ciphertext_and_tag_length, size_t* bytes_written,
char** error_details) {
if (crypter != nullptr && crypter->vtable != nullptr &&
crypter->vtable->encrypt_iovec != nullptr) {
struct iovec aad_vec = {(void*)aad, aad_length};
struct iovec plaintext_vec = {(void*)plaintext, plaintext_length};
struct iovec ciphertext_vec = {ciphertext_and_tag,
ciphertext_and_tag_length};
return crypter->vtable->encrypt_iovec(
crypter, nonce, nonce_length, &aad_vec, 1, &plaintext_vec, 1,
ciphertext_vec, bytes_written, error_details);
}
/* An error occurred. */
maybe_copy_error_msg(vtable_error_msg, error_details);
return GRPC_STATUS_INVALID_ARGUMENT;
}
grpc_status_code gsec_aead_crypter_encrypt_iovec(
gsec_aead_crypter* crypter, const uint8_t* nonce, size_t nonce_length,
const struct iovec* aad_vec, size_t aad_vec_length,
const struct iovec* plaintext_vec, size_t plaintext_vec_length,
struct iovec ciphertext_vec, size_t* ciphertext_bytes_written,
char** error_details) {
if (crypter != nullptr && crypter->vtable != nullptr &&
crypter->vtable->encrypt_iovec != nullptr) {
return crypter->vtable->encrypt_iovec(
crypter, nonce, nonce_length, aad_vec, aad_vec_length, plaintext_vec,
plaintext_vec_length, ciphertext_vec, ciphertext_bytes_written,
error_details);
}
/* An error occurred. */
maybe_copy_error_msg(vtable_error_msg, error_details);
return GRPC_STATUS_INVALID_ARGUMENT;
}
grpc_status_code gsec_aead_crypter_decrypt(
gsec_aead_crypter* crypter, const uint8_t* nonce, size_t nonce_length,
const uint8_t* aad, size_t aad_length, const uint8_t* ciphertext_and_tag,
size_t ciphertext_and_tag_length, uint8_t* plaintext,
size_t plaintext_length, size_t* bytes_written, char** error_details) {
if (crypter != nullptr && crypter->vtable != nullptr &&
crypter->vtable->decrypt_iovec != nullptr) {
struct iovec aad_vec = {(void*)aad, aad_length};
struct iovec ciphertext_vec = {(void*)ciphertext_and_tag,
ciphertext_and_tag_length};
struct iovec plaintext_vec = {plaintext, plaintext_length};
return crypter->vtable->decrypt_iovec(
crypter, nonce, nonce_length, &aad_vec, 1, &ciphertext_vec, 1,
plaintext_vec, bytes_written, error_details);
}
/* An error occurred. */
maybe_copy_error_msg(vtable_error_msg, error_details);
return GRPC_STATUS_INVALID_ARGUMENT;
}
grpc_status_code gsec_aead_crypter_decrypt_iovec(
gsec_aead_crypter* crypter, const uint8_t* nonce, size_t nonce_length,
const struct iovec* aad_vec, size_t aad_vec_length,
const struct iovec* ciphertext_vec, size_t ciphertext_vec_length,
struct iovec plaintext_vec, size_t* plaintext_bytes_written,
char** error_details) {
if (crypter != nullptr && crypter->vtable != nullptr &&
crypter->vtable->encrypt_iovec != nullptr) {
return crypter->vtable->decrypt_iovec(
crypter, nonce, nonce_length, aad_vec, aad_vec_length, ciphertext_vec,
ciphertext_vec_length, plaintext_vec, plaintext_bytes_written,
error_details);
}
/* An error occurred. */
maybe_copy_error_msg(vtable_error_msg, error_details);
return GRPC_STATUS_INVALID_ARGUMENT;
}
grpc_status_code gsec_aead_crypter_max_ciphertext_and_tag_length(
const gsec_aead_crypter* crypter, size_t plaintext_length,
size_t* max_ciphertext_and_tag_length_to_return, char** error_details) {
if (crypter != nullptr && crypter->vtable != nullptr &&
crypter->vtable->max_ciphertext_and_tag_length != nullptr) {
return crypter->vtable->max_ciphertext_and_tag_length(
crypter, plaintext_length, max_ciphertext_and_tag_length_to_return,
error_details);
}
/* An error occurred. */
maybe_copy_error_msg(vtable_error_msg, error_details);
return GRPC_STATUS_INVALID_ARGUMENT;
}
grpc_status_code gsec_aead_crypter_max_plaintext_length(
const gsec_aead_crypter* crypter, size_t ciphertext_and_tag_length,
size_t* max_plaintext_length_to_return, char** error_details) {
if (crypter != nullptr && crypter->vtable != nullptr &&
crypter->vtable->max_plaintext_length != nullptr) {
return crypter->vtable->max_plaintext_length(
crypter, ciphertext_and_tag_length, max_plaintext_length_to_return,
error_details);
}
/* An error occurred. */
maybe_copy_error_msg(vtable_error_msg, error_details);
return GRPC_STATUS_INVALID_ARGUMENT;
}
grpc_status_code gsec_aead_crypter_nonce_length(
const gsec_aead_crypter* crypter, size_t* nonce_length_to_return,
char** error_details) {
if (crypter != nullptr && crypter->vtable != nullptr &&
crypter->vtable->nonce_length != nullptr) {
return crypter->vtable->nonce_length(crypter, nonce_length_to_return,
error_details);
}
/* An error occurred. */
maybe_copy_error_msg(vtable_error_msg, error_details);
return GRPC_STATUS_INVALID_ARGUMENT;
}
grpc_status_code gsec_aead_crypter_key_length(const gsec_aead_crypter* crypter,
size_t* key_length_to_return,
char** error_details) {
if (crypter != nullptr && crypter->vtable != nullptr &&
crypter->vtable->key_length != nullptr) {
return crypter->vtable->key_length(crypter, key_length_to_return,
error_details);
}
/* An error occurred */
maybe_copy_error_msg(vtable_error_msg, error_details);
return GRPC_STATUS_INVALID_ARGUMENT;
}
grpc_status_code gsec_aead_crypter_tag_length(const gsec_aead_crypter* crypter,
size_t* tag_length_to_return,
char** error_details) {
if (crypter != nullptr && crypter->vtable != nullptr &&
crypter->vtable->tag_length != nullptr) {
return crypter->vtable->tag_length(crypter, tag_length_to_return,
error_details);
}
/* An error occurred. */
maybe_copy_error_msg(vtable_error_msg, error_details);
return GRPC_STATUS_INVALID_ARGUMENT;
}
void gsec_aead_crypter_destroy(gsec_aead_crypter* crypter) {
if (crypter != nullptr) {
if (crypter->vtable != nullptr && crypter->vtable->destruct != nullptr) {
crypter->vtable->destruct(crypter);
}
gpr_free(crypter);
}
}
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