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#include "test_common.h"
#include <openssl/opensslv.h>
#include <openssl/evp.h>
#include <openssl/hmac.h>
#include <openssl/rand.h>
#include <openssl/sha.h>
int test_random_generator(uint8_t *data, size_t len, void *user_data)
{
if(RAND_bytes(data, len)) {
return 0;
}
else {
return SG_ERR_UNKNOWN;
}
}
int test_hmac_sha256_init(void **hmac_context, const uint8_t *key, size_t key_len, void *user_data)
{
#if OPENSSL_VERSION_NUMBER >= 0x1010000fL
HMAC_CTX *ctx = HMAC_CTX_new();
if(!ctx) {
return SG_ERR_NOMEM;
}
#else
HMAC_CTX *ctx = malloc(sizeof(HMAC_CTX));
if(!ctx) {
return SG_ERR_NOMEM;
}
HMAC_CTX_init(ctx);
#endif
*hmac_context = ctx;
if(HMAC_Init_ex(ctx, key, key_len, EVP_sha256(), 0) != 1) {
return SG_ERR_UNKNOWN;
}
return 0;
}
int test_hmac_sha256_update(void *hmac_context, const uint8_t *data, size_t data_len, void *user_data)
{
HMAC_CTX *ctx = hmac_context;
int result = HMAC_Update(ctx, data, data_len);
return (result == 1) ? 0 : -1;
}
int test_hmac_sha256_final(void *hmac_context, signal_buffer **output, void *user_data)
{
int result = 0;
unsigned char md[EVP_MAX_MD_SIZE];
unsigned int len = 0;
HMAC_CTX *ctx = hmac_context;
if(HMAC_Final(ctx, md, &len) != 1) {
return SG_ERR_UNKNOWN;
}
signal_buffer *output_buffer = signal_buffer_create(md, len);
if(!output_buffer) {
result = SG_ERR_NOMEM;
goto complete;
}
*output = output_buffer;
complete:
return result;
}
void test_hmac_sha256_cleanup(void *hmac_context, void *user_data)
{
if(hmac_context) {
HMAC_CTX *ctx = hmac_context;
#if OPENSSL_VERSION_NUMBER >= 0x1010000fL
HMAC_CTX_free(ctx);
#else
HMAC_CTX_cleanup(ctx);
free(ctx);
#endif
}
}
const EVP_CIPHER *aes_cipher(int cipher, size_t key_len)
{
if(cipher == SG_CIPHER_AES_CBC_PKCS5) {
if(key_len == 16) {
return EVP_aes_128_cbc();
}
else if(key_len == 24) {
return EVP_aes_192_cbc();
}
else if(key_len == 32) {
return EVP_aes_256_cbc();
}
}
else if(cipher == SG_CIPHER_AES_CTR_NOPADDING) {
if(key_len == 16) {
return EVP_aes_128_ctr();
}
else if(key_len == 24) {
return EVP_aes_192_ctr();
}
else if(key_len == 32) {
return EVP_aes_256_ctr();
}
}
return 0;
}
int test_sha512_digest_init(void **digest_context, void *user_data)
{
int result = 0;
EVP_MD_CTX *ctx;
ctx = EVP_MD_CTX_create();
if(!ctx) {
result = SG_ERR_NOMEM;
goto complete;
}
result = EVP_DigestInit_ex(ctx, EVP_sha512(), 0);
if(result == 1) {
result = SG_SUCCESS;
}
else {
result = SG_ERR_UNKNOWN;
}
complete:
if(result < 0) {
if(ctx) {
EVP_MD_CTX_destroy(ctx);
}
}
else {
*digest_context = ctx;
}
return result;
}
int test_sha512_digest_update(void *digest_context, const uint8_t *data, size_t data_len, void *user_data)
{
EVP_MD_CTX *ctx = digest_context;
int result = EVP_DigestUpdate(ctx, data, data_len);
return (result == 1) ? SG_SUCCESS : SG_ERR_UNKNOWN;
}
int test_sha512_digest_final(void *digest_context, signal_buffer **output, void *user_data)
{
int result = 0;
unsigned char md[EVP_MAX_MD_SIZE];
unsigned int len = 0;
EVP_MD_CTX *ctx = digest_context;
result = EVP_DigestFinal_ex(ctx, md, &len);
if(result == 1) {
result = SG_SUCCESS;
}
else {
result = SG_ERR_UNKNOWN;
goto complete;
}
result = EVP_DigestInit_ex(ctx, EVP_sha512(), 0);
if(result == 1) {
result = SG_SUCCESS;
}
else {
result = SG_ERR_UNKNOWN;
goto complete;
}
signal_buffer *output_buffer = signal_buffer_create(md, len);
if(!output_buffer) {
result = SG_ERR_NOMEM;
goto complete;
}
*output = output_buffer;
complete:
return result;
}
void test_sha512_digest_cleanup(void *digest_context, void *user_data)
{
EVP_MD_CTX *ctx = digest_context;
EVP_MD_CTX_destroy(ctx);
}
int test_encrypt(signal_buffer **output,
int cipher,
const uint8_t *key, size_t key_len,
const uint8_t *iv, size_t iv_len,
const uint8_t *plaintext, size_t plaintext_len,
void *user_data)
{
int result = 0;
EVP_CIPHER_CTX *ctx = 0;
uint8_t *out_buf = 0;
const EVP_CIPHER *evp_cipher = aes_cipher(cipher, key_len);
if(!evp_cipher) {
fprintf(stderr, "invalid AES mode or key size: %zu\n", key_len);
return SG_ERR_UNKNOWN;
}
if(iv_len != 16) {
fprintf(stderr, "invalid AES IV size: %zu\n", iv_len);
return SG_ERR_UNKNOWN;
}
if(plaintext_len > INT_MAX - EVP_CIPHER_block_size(evp_cipher)) {
fprintf(stderr, "invalid plaintext length: %zu\n", plaintext_len);
return SG_ERR_UNKNOWN;
}
#if OPENSSL_VERSION_NUMBER >= 0x1010000fL
ctx = EVP_CIPHER_CTX_new();
if(!ctx) {
result = SG_ERR_NOMEM;
goto complete;
}
#else
ctx = malloc(sizeof(EVP_CIPHER_CTX));
if(!ctx) {
result = SG_ERR_NOMEM;
goto complete;
}
EVP_CIPHER_CTX_init(ctx);
#endif
result = EVP_EncryptInit_ex(ctx, evp_cipher, 0, key, iv);
if(!result) {
fprintf(stderr, "cannot initialize cipher\n");
result = SG_ERR_UNKNOWN;
goto complete;
}
if(cipher == SG_CIPHER_AES_CTR_NOPADDING) {
result = EVP_CIPHER_CTX_set_padding(ctx, 0);
if(!result) {
fprintf(stderr, "cannot set padding\n");
result = SG_ERR_UNKNOWN;
goto complete;
}
}
out_buf = malloc(sizeof(uint8_t) * (plaintext_len + EVP_CIPHER_block_size(evp_cipher)));
if(!out_buf) {
fprintf(stderr, "cannot allocate output buffer\n");
result = SG_ERR_NOMEM;
goto complete;
}
int out_len = 0;
result = EVP_EncryptUpdate(ctx,
out_buf, &out_len, plaintext, plaintext_len);
if(!result) {
fprintf(stderr, "cannot encrypt plaintext\n");
result = SG_ERR_UNKNOWN;
goto complete;
}
int final_len = 0;
result = EVP_EncryptFinal_ex(ctx, out_buf + out_len, &final_len);
if(!result) {
fprintf(stderr, "cannot finish encrypting plaintext\n");
result = SG_ERR_UNKNOWN;
goto complete;
}
*output = signal_buffer_create(out_buf, out_len + final_len);
complete:
if(ctx) {
#if OPENSSL_VERSION_NUMBER >= 0x1010000fL
EVP_CIPHER_CTX_free(ctx);
#else
EVP_CIPHER_CTX_cleanup(ctx);
free(ctx);
#endif
}
if(out_buf) {
free(out_buf);
}
return result;
}
int test_decrypt(signal_buffer **output,
int cipher,
const uint8_t *key, size_t key_len,
const uint8_t *iv, size_t iv_len,
const uint8_t *ciphertext, size_t ciphertext_len,
void *user_data)
{
int result = 0;
EVP_CIPHER_CTX *ctx = 0;
uint8_t *out_buf = 0;
const EVP_CIPHER *evp_cipher = aes_cipher(cipher, key_len);
if(!evp_cipher) {
fprintf(stderr, "invalid AES mode or key size: %zu\n", key_len);
return SG_ERR_INVAL;
}
if(iv_len != 16) {
fprintf(stderr, "invalid AES IV size: %zu\n", iv_len);
return SG_ERR_INVAL;
}
if(ciphertext_len > INT_MAX - EVP_CIPHER_block_size(evp_cipher)) {
fprintf(stderr, "invalid ciphertext length: %zu\n", ciphertext_len);
return SG_ERR_UNKNOWN;
}
#if OPENSSL_VERSION_NUMBER >= 0x1010000fL
ctx = EVP_CIPHER_CTX_new();
if(!ctx) {
result = SG_ERR_NOMEM;
goto complete;
}
#else
ctx = malloc(sizeof(EVP_CIPHER_CTX));
if(!ctx) {
result = SG_ERR_NOMEM;
goto complete;
}
EVP_CIPHER_CTX_init(ctx);
#endif
result = EVP_DecryptInit_ex(ctx, evp_cipher, 0, key, iv);
if(!result) {
fprintf(stderr, "cannot initialize cipher\n");
result = SG_ERR_UNKNOWN;
goto complete;
}
if(cipher == SG_CIPHER_AES_CTR_NOPADDING) {
result = EVP_CIPHER_CTX_set_padding(ctx, 0);
if(!result) {
fprintf(stderr, "cannot set padding\n");
result = SG_ERR_UNKNOWN;
goto complete;
}
}
out_buf = malloc(sizeof(uint8_t) * (ciphertext_len + EVP_CIPHER_block_size(evp_cipher)));
if(!out_buf) {
fprintf(stderr, "cannot allocate output buffer\n");
result = SG_ERR_UNKNOWN;
goto complete;
}
int out_len = 0;
result = EVP_DecryptUpdate(ctx,
out_buf, &out_len, ciphertext, ciphertext_len);
if(!result) {
fprintf(stderr, "cannot decrypt ciphertext\n");
result = SG_ERR_UNKNOWN;
goto complete;
}
int final_len = 0;
result = EVP_DecryptFinal_ex(ctx, out_buf + out_len, &final_len);
if(!result) {
fprintf(stderr, "cannot finish decrypting ciphertext\n");
result = SG_ERR_UNKNOWN;
goto complete;
}
*output = signal_buffer_create(out_buf, out_len + final_len);
complete:
if(ctx) {
#if OPENSSL_VERSION_NUMBER >= 0x1010000fL
EVP_CIPHER_CTX_free(ctx);
#else
EVP_CIPHER_CTX_cleanup(ctx);
free(ctx);
#endif
}
if(out_buf) {
free(out_buf);
}
return result;
}
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