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/*
* Copyright (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
* This file is part of the "AES tools" project.
* For details, see https://github.com/egor-tensin/aes-tools.
* Distributed under the MIT License.
*/
#include <aes/all.h>
#include <assert.h>
#include <stdio.h>
#include <string.h>
AES_StatusCode aes128_format_key(
AES128_KeyString* str,
const AES128_Key* key,
AES_ErrorDetails* err_details
) {
if (str == NULL)
return aes_error_null_argument(err_details, "str");
if (key == NULL)
return aes_error_null_argument(err_details, "key");
char* cursor = str->str;
AES_ALIGN(unsigned char, 16) bytes[16];
aes_store_block_aligned(bytes, key->key);
for (int i = 0; i < 16; ++i, cursor += 2)
sprintf(cursor, "%02x", bytes[i]);
*cursor = '\0';
return AES_SUCCESS;
}
AES_StatusCode aes192_format_key(
AES192_KeyString* str,
const AES192_Key* key,
AES_ErrorDetails* err_details
) {
if (str == NULL)
return aes_error_null_argument(err_details, "str");
if (key == NULL)
return aes_error_null_argument(err_details, "key");
char* cursor = str->str;
{
AES_ALIGN(unsigned char, 16) bytes[16];
aes_store_block_aligned(bytes, key->lo);
for (int i = 0; i < 16; ++i, cursor += 2)
sprintf(cursor, "%02x", bytes[i]);
}
{
AES_ALIGN(unsigned char, 16) bytes[16];
aes_store_block_aligned(bytes, key->hi);
for (int i = 0; i < 8; ++i, cursor += 2)
sprintf(cursor, "%02x", bytes[i]);
}
*cursor = '\0';
return AES_SUCCESS;
}
AES_StatusCode aes256_format_key(
AES256_KeyString* str,
const AES256_Key* key,
AES_ErrorDetails* err_details
) {
if (str == NULL)
return aes_error_null_argument(err_details, "str");
if (key == NULL)
return aes_error_null_argument(err_details, "key");
char* cursor = str->str;
{
AES_ALIGN(unsigned char, 16) bytes[16];
aes_store_block_aligned(bytes, key->lo);
for (int i = 0; i < 16; ++i, cursor += 2)
sprintf(cursor, "%02x", bytes[i]);
}
{
AES_ALIGN(unsigned char, 16) bytes[16];
aes_store_block_aligned(bytes, key->hi);
for (int i = 0; i < 16; ++i, cursor += 2)
sprintf(cursor, "%02x", bytes[i]);
}
*cursor = '\0';
return AES_SUCCESS;
}
AES_StatusCode aes128_parse_key(AES128_Key* dest, const char* src, AES_ErrorDetails* err_details) {
return aes_parse_block(&dest->key, src, err_details);
}
AES_StatusCode aes192_parse_key(AES192_Key* dest, const char* src, AES_ErrorDetails* err_details) {
if (dest == NULL)
return aes_error_null_argument(err_details, "dest");
if (src == NULL)
return aes_error_null_argument(err_details, "src");
const char* cursor = src;
{
AES_ALIGN(unsigned char, 16) bytes[16];
for (int i = 0; i < 16; ++i) {
int n;
unsigned int byte;
if (sscanf(cursor, "%2x%n", &byte, &n) != 1)
return aes_error_parse(err_details, src, "a 192-bit block");
bytes[i] = (unsigned char)byte;
cursor += n;
}
dest->lo = aes_load_block_aligned(bytes);
}
{
AES_ALIGN(unsigned char, 16) bytes[16];
for (int i = 0; i < 8; ++i) {
int n;
unsigned int byte;
if (sscanf(cursor, "%2x%n", &byte, &n) != 1)
return aes_error_parse(err_details, src, "a 192-bit block");
bytes[i] = (unsigned char)byte;
cursor += n;
}
memset(bytes + 8, 0x00, 8);
dest->hi = aes_load_block_aligned(bytes);
}
return AES_SUCCESS;
}
AES_StatusCode aes256_parse_key(AES256_Key* dest, const char* src, AES_ErrorDetails* err_details) {
if (dest == NULL)
return aes_error_null_argument(err_details, "dest");
if (src == NULL)
return aes_error_null_argument(err_details, "src");
const char* cursor = src;
{
AES_ALIGN(unsigned char, 16) bytes[16];
for (int i = 0; i < 16; ++i) {
int n;
unsigned int byte;
if (sscanf(cursor, "%2x%n", &byte, &n) != 1)
return aes_error_parse(err_details, src, "a 256-bit block");
bytes[i] = (unsigned char)byte;
cursor += n;
}
dest->lo = aes_load_block_aligned(bytes);
}
{
AES_ALIGN(unsigned char, 16) bytes[16];
for (int i = 0; i < 16; ++i) {
int n;
unsigned int byte;
if (sscanf(cursor, "%2x%n", &byte, &n) != 1)
return aes_error_parse(err_details, src, "a 256-bit block");
bytes[i] = (unsigned char)byte;
cursor += n;
}
dest->hi = aes_load_block_aligned(bytes);
}
return AES_SUCCESS;
}
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