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Begin OpenSSL AES Key transformation

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This commit is contained in:
William Brawner 2018-04-13 08:29:17 -05:00
parent c47fa050fe
commit 77366d9736
2 changed files with 87 additions and 5 deletions
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52
crypto-openssl.c
View file

@ -45,17 +45,59 @@
#include "mod0keecrack.h"
int aes_transformkey(m0_kdbx_header_entry_t *hdr, uint8_t *tkey, size_t tkeylen) {
int aes_transformkey(m0_kdbx_header_entry_t *hdr, uint8_t *tkey, size_t tkeylen)
{
uint64_t rounds = 0;
EVP_CIPHER_CTX *ctx = EVP_CIPHER_CTX_new();
EVP_EncryptInit_ex(
ctx,
EVP_aes_128_ecb(),
NULL,
key,
NULL);
EVP_EncryptUpdate(
ctx,
NULL,
0,
tkey,
tkeylen);
for(rounds = 0; rounds < hdr[TRANSFORMROUNDS].qw; rounds++) {
}
cleanup:
if (ctx) {
EVP_CIPHER_CTX_free(ctx);
}
}
int aes_decrypt_check(m0_kdbx_header_entry_t *hdr, uint8_t *masterkey, m0_kdbx_payload_t *p) {
bool aes_decrypt_check(m0_kdbx_header_entry_t *hdr, uint8_t *masterkey, m0_kdbx_payload_t *p) {
}
int sha256_hash(uint8_t *hash, uint8_t *data, size_t len) {
EVP_MD_CTX *ctx = EVP_MD_CTX_new();
EVP_DigestInit(ctx, EVP_sha256());
EVP_DigestUpdate(ctx, data, len);
EVP_DigestFinal(ctx, hash, NULL);
EVP_DigestInit(
ctx,
EVP_sha256()
);
EVP_DigestUpdate(
ctx,
data,
len
);
EVP_DigestFinal(
ctx,
hash,
NULL
);
return 0;
}

40
sha256.c Normal file
View file

@ -0,0 +1,40 @@
/*
* =====================================================================================
*
* Filename: sha256.c
*
* Description: An OpenSSL SHA256 Utility
*
* Version: 1.0
* Created: 04/03/2018 06:13:41 PM
* Revision: none
* Compiler: gcc
*
* Author: William Brawner (Billy), billybrawner@gmail.com
* Organization:
*
* =====================================================================================
*/
#include <openssl/evp.h>
#include <stdlib.h>
#include <string.h>
#include "helper.h"
int main(int argc, char ** argv) {
if (argc < 2) {
printf("Please enter a string to hash\n");
return 1;
}
printf("You entered %s\n", argv[1]);
printf("Your string contains %d characters\n", strlen(argv[1]));
EVP_MD_CTX *ctx = EVP_MD_CTX_new();
EVP_DigestInit(ctx, EVP_sha256());
EVP_DigestUpdate(ctx, argv[1], strlen(argv[1]));
char* hash = malloc(EVP_MD_CTX_size(ctx));
EVP_DigestFinal(ctx, hash, NULL);
printf("Your hashed string: ");
print_hex_buf(hash, 32);
printf("\n");
}