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changed aes transform to cipher text stealing mode

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This commit is contained in:
Logan007 2020-08-24 02:37:06 +05:45
parent 6d05d48878
commit 680248d154
3 changed files with 7 additions and 5 deletions
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4
include/aes.h
View File

@ -48,10 +48,10 @@ typedef struct aes_context_t {
int aes_cbc_encrypt (unsigned char *out, const unsigned char *in, size_t in_len,
const unsigned char *iv, aes_context_t *ctx);
unsigned char *iv, aes_context_t *ctx);
int aes_cbc_decrypt (unsigned char *out, const unsigned char *in, size_t in_len,
const unsigned char *iv, aes_context_t *ctx);
unsigned char *iv, aes_context_t *ctx);
int aes_ecb_decrypt (unsigned char *out, const unsigned char *in, aes_context_t *ctx);

6
src/aes.c
View File

@ -45,7 +45,7 @@ static char *openssl_err_as_string (void) {
/* ****************************************************** */
int aes_cbc_encrypt (unsigned char *out, const unsigned char *in, size_t in_len,
const unsigned char *iv, aes_context_t *ctx) {
unsigned char *iv, aes_context_t *ctx) {
#ifdef HAVE_OPENSSL_1_1
int evp_len;
@ -81,13 +81,14 @@ int aes_cbc_encrypt (unsigned char *out, const unsigned char *in, size_t in_len,
&(ctx->enc_key),
iv,
AES_ENCRYPT);
memset(iv, 0, AES_BLOCK_SIZE);
#endif
}
/* ****************************************************** */
int aes_cbc_decrypt (unsigned char *out, const unsigned char *in, size_t in_len,
const unsigned char *iv, aes_context_t *ctx) {
unsigned char *iv, aes_context_t *ctx) {
#ifdef HAVE_OPENSSL_1_1
int evp_len;
@ -123,6 +124,7 @@ int aes_cbc_decrypt (unsigned char *out, const unsigned char *in, size_t in_len,
&(ctx->dec_key),
iv,
AES_DECRYPT);
memset(iv, 0, AES_BLOCK_SIZE);
#endif
return 0;

2
src/transform_aes.c
View File

@ -35,7 +35,7 @@
// cbc mode is being used with random value prepended to plaintext
// instead of iv so, actual iv is null_iv
const uint8_t null_iv[AES_IV_SIZE] = {0};
uint8_t null_iv[AES_IV_SIZE] = {0};
typedef struct transop_aes {
aes_context_t *ctx;