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des-ecb done

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This commit is contained in:
Gregory 2019-04-08 22:30:34 +03:00
parent a5b4066b3f
commit 19b52a1deb
12 changed files with 157 additions and 84 deletions
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6
Makefile
View file

@ -138,11 +138,15 @@ DES_SRC = ft_des_initial_permutation.c \
ft_des_process_block.c \
ft_des_generate_encryption_round_keys.c \
ft_des_generate_decryption_round_keys.c \
ft_des_arg_parsers.c \
ft_des_ecb.c \
ft_des_init_ctx.c \
ft_des_set_raw_key.c \
ft_des_get_password.c \
ft_des_derive_key.c \
ft_des_encryption_key_routine.c \
ft_des_decryption_key_routine.c \
ft_des_print_error.c \
ft_des_arg_parsers.c \
ft_des_ecb_encrypt.c \
ft_des_ecb_decrypt.c \
ft_des_ecb_decrypt_b64.c \

23
inc/ft_des.h
View file

@ -41,7 +41,6 @@ typedef struct s_des_ctx
int b64;
int readed;
t_byte1 buffer[FT_DES_BYTE_BLOCK_SIZE];
t_byte1 salt[FT_DES_BYTE_BLOCK_SIZE];
t_byte1 key[FT_DES_INITIAL_KEY_SIZE];
t_byte1 iv[FT_DES_BIT_BLOCK_SIZE];
t_byte1 round_keys[FT_DES_ROUND_COUNT]
@ -369,4 +368,26 @@ void ft_des_encryption_key_routine
t_des_ctx *ctx
);
void ft_des_decryption_key_routine
(
t_des_ctx *ctx
);
void ft_des_set_raw_key
(
t_des_ctx *ctx
);
void ft_des_get_password
(
t_des_ctx *ctx
);
void ft_des_derive_key
(
t_byte1 key[FT_DES_BIT_BLOCK_SIZE],
char salt[FT_DES_BYTE_BLOCK_SIZE],
char *pass
);
#endif

40
src/des/ft_des_decryption_key_routine.c Normal file
View file

@ -0,0 +1,40 @@
#include <fcntl.h>
#include <stdio.h>
#include "ft_des.h"
#include "libft.h"
static void get_salt
(
t_des_ctx *c,
char salt[FT_DES_BYTE_BLOCK_SIZE]
)
{
char buffer[FT_DES_BYTE_BLOCK_SIZE];
int readed;
readed = read(c->input_fd, buffer, FT_DES_BYTE_BLOCK_SIZE);
if (readed != FT_DES_BYTE_BLOCK_SIZE)
ft_des_print_error("error reading input");
readed = read(c->input_fd, buffer, FT_DES_BYTE_BLOCK_SIZE);
if (readed != FT_DES_BYTE_BLOCK_SIZE)
ft_des_print_error("error reading input");
ft_memcpy(salt, buffer, FT_DES_BYTE_BLOCK_SIZE);
}
void ft_des_decryption_key_routine
(
t_des_ctx *ctx
)
{
char salt[FT_DES_BYTE_BLOCK_SIZE];
if (ctx->raw_password || !ctx->raw_key)
get_salt(ctx, salt);
if (!ctx->raw_password && !ctx->raw_key)
{
ft_des_get_password(ctx);
ft_des_derive_key(ctx->key, salt, (char *)ctx->raw_password);
}
if (ctx->raw_key)
ft_des_set_raw_key(ctx);
}

25
src/des/ft_des_derive_key.c Normal file
View file

@ -0,0 +1,25 @@
#include "ft_des.h"
#include "ft_pbkdf2.h"
#include "libft.h"
void ft_des_derive_key
(
t_byte1 key[FT_DES_BIT_BLOCK_SIZE],
char salt[FT_DES_BYTE_BLOCK_SIZE],
char *pass
)
{
t_pbkdf2_sha256_ctx pbkdf_ctx;
t_byte1 byte_key[FT_DES_BYTE_BLOCK_SIZE];
pbkdf_ctx.iterations = 10000;
pbkdf_ctx.key = byte_key;
pbkdf_ctx.salt_len = FT_DES_BYTE_BLOCK_SIZE;
pbkdf_ctx.key_len = FT_DES_BYTE_BLOCK_SIZE;
pbkdf_ctx.pass_len = ft_strlen(pass);
pbkdf_ctx.pass = (t_byte1 *)pass;
pbkdf_ctx.salt = (t_byte1 *)salt;
ft_pbkdf2_sha256(&pbkdf_ctx);
ft_des_byte_to_bits(byte_key, FT_DES_BYTE_BLOCK_SIZE, key,
FT_DES_INITIAL_KEY_SIZE);
}

1
src/des/ft_des_ecb.c
View file

@ -87,7 +87,6 @@ void ft_des_ecb
}
else
{
ft_des_encryption_key_routine(&ctx);
if (ctx.b64)
ft_des_ecb_encrypt_b64(&ctx);
else

1
src/des/ft_des_ecb_decrypt.c
View file

@ -35,6 +35,7 @@ void ft_des_ecb_decrypt
t_byte1 buffer[FT_DES_BYTE_BLOCK_SIZE];
t_byte1 message[FT_DES_BYTE_BLOCK_SIZE];
ft_des_decryption_key_routine(c);
ft_des_generate_decryption_round_keys(c->key, c->round_keys);
last_read = 0;
while((readed = buffered_read(c, buffer)))

6
src/des/ft_des_ecb_encrypt.c
View file

@ -10,12 +10,8 @@ void ft_des_ecb_encrypt
t_byte1 buffer[FT_DES_READ_SIZE];
t_byte8 readed;
ft_des_encryption_key_routine(ctx);
ft_des_generate_encryption_round_keys(ctx->key, ctx->round_keys);
if (ctx->raw_password)
{
write(ctx->output_fd, "Salted__", 8);
write(ctx->output_fd, ctx->salt, FT_DES_BYTE_BLOCK_SIZE);
}
while((readed = read(ctx->input_fd, buffer, FT_DES_READ_SIZE)) > 0)
ft_des_ecb_encode_process_chunk(ctx, readed, buffer);
ft_des_ecb_finish_encrypt(ctx);

83
src/des/ft_des_encryption_key_routine.c
View file

@ -1,56 +1,25 @@
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include "ft_des.h"
#include "ft_pbkdf2.h"
#include "libft.h"
static void derive_key
(
t_des_ctx *ctx
)
{
t_pbkdf2_sha256_ctx pbkdf_ctx;
t_byte1 byte_key[FT_DES_BYTE_BLOCK_SIZE];
pbkdf_ctx.iterations = 10000;
pbkdf_ctx.key = byte_key;
pbkdf_ctx.salt_len = FT_DES_BYTE_BLOCK_SIZE;
pbkdf_ctx.key_len = FT_DES_BYTE_BLOCK_SIZE;
pbkdf_ctx.pass_len = ft_strlen((char *)ctx->raw_password);
pbkdf_ctx.pass = (t_byte1 *)ctx->raw_password;
pbkdf_ctx.salt = (t_byte1 *)ctx->salt;
ft_pbkdf2_sha256(&pbkdf_ctx);
ft_des_byte_to_bits(byte_key, FT_DES_BYTE_BLOCK_SIZE, ctx->key,
FT_DES_INITIAL_KEY_SIZE);
}
static void get_pass
(
char pass[128]
)
{
char *first_try[128];
char *second_try[128];
ft_bzero(first_try, 128);
ft_bzero(second_try, 128);
ft_strcpy((char *)first_try, getpass("enter password:"));
if (!ft_strlen((const char *)first_try))
exit(1);
ft_strcpy((char *)second_try, getpass("retype password:"));
if (ft_strcmp((const char *)first_try, (const char *)second_try) != 0)
ft_des_print_error("passwords doesn't match");
ft_strcpy(pass, (const char *)first_try);
}
static void get_salt
(
t_des_ctx *c,
char salt[FT_DES_BYTE_BLOCK_SIZE]
)
{
int fd;
if (c->raw_salt)
{
ft_bzero(salt, FT_DES_BYTE_BLOCK_SIZE);
if (ft_des_hex_to_byte(c->raw_salt, (t_byte1 *)salt,
FT_DES_BYTE_BLOCK_SIZE))
ft_des_print_error("wrong char in salt");
}
else
{
fd = open("/dev/random", O_RDONLY);
if (fd == -1)
{
@ -58,19 +27,7 @@ static void get_salt
exit(1);
}
read(fd, salt, FT_DES_BYTE_BLOCK_SIZE);
}
static void get_key
(
t_des_ctx *ctx
)
{
const char *wrong_char;
wrong_char = ft_des_hex_to_bit(ctx->raw_key, ctx->key,
FT_DES_INITIAL_KEY_SIZE);
if (wrong_char)
ft_des_print_error("wrong char in hex key");
}
}
void ft_des_encryption_key_routine
@ -78,19 +35,19 @@ void ft_des_encryption_key_routine
t_des_ctx *ctx
)
{
char pass[128];
char salt[FT_DES_BYTE_BLOCK_SIZE];
if (ctx->raw_key)
ft_des_set_raw_key(ctx);
else
{
get_key(ctx);
return ;
ft_des_get_password(ctx);
get_salt(ctx, salt);
ft_des_derive_key(ctx->key, salt, (char *)ctx->raw_password);
}
if (!ctx->raw_password)
if (ctx->raw_password || !ctx->raw_key)
{
get_pass(pass);
ctx->raw_password = pass;
write(ctx->output_fd, "Salted__", 8);
write(ctx->output_fd, salt, FT_DES_BYTE_BLOCK_SIZE);
}
if (!ctx->raw_salt)
get_salt((char *)ctx->salt);
derive_key(ctx);
}

23
src/des/ft_des_get_password.c Normal file
View file

@ -0,0 +1,23 @@
#include "ft_des.h"
#include "libft.h"
void ft_des_get_password
(
t_des_ctx *ctx
)
{
char *first_try[128];
char *second_try[128];
if (ctx->raw_key || ctx->raw_password)
return ;
ft_bzero(first_try, 128);
ft_bzero(second_try, 128);
ft_strcpy((char *)first_try, getpass("enter password:"));
if (!ft_strlen((const char *)first_try))
exit(1);
ft_strcpy((char *)second_try, getpass("retype password:"));
if (ft_strcmp((const char *)first_try, (const char *)second_try) != 0)
ft_des_print_error("passwords doesn't match");
ctx->raw_password = (char *)second_try;
}

1
src/des/ft_des_init_ctx.c
View file

@ -17,7 +17,6 @@ void ft_des_init_ctx
}
ft_bzero(ctx->key, FT_DES_INITIAL_KEY_SIZE);
ft_bzero(ctx->buffer, FT_DES_BYTE_BLOCK_SIZE);
ft_bzero(ctx->salt, FT_DES_BIT_BLOCK_SIZE);
ft_bzero(ctx->iv, FT_DES_BIT_BLOCK_SIZE);
ctx->readed = 0;
ctx->decode = 0;

14
src/des/ft_des_set_raw_key.c Normal file
View file

@ -0,0 +1,14 @@
#include "ft_des.h"
void ft_des_set_raw_key
(
t_des_ctx *ctx
)
{
const char *wrong_char;
wrong_char = ft_des_hex_to_bit(ctx->raw_key, ctx->key,
FT_DES_INITIAL_KEY_SIZE);
if (wrong_char)
ft_des_print_error("wrong char in hex key");
}

6
t/des_tests.c
View file

@ -655,12 +655,6 @@ int init_ctx()
}
i = 0;
while(i < FT_DES_BIT_BLOCK_SIZE)
{
_is(ctx.salt[i] == 0);
i++;
}
i = 0;
while(i < FT_DES_BIT_BLOCK_SIZE)
{
_is(ctx.iv[i] == 0);
i++;