Muldersoft/SlunkCrypt
Muldersoft/SlunkCrypt
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Some code clean-up.

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This commit is contained in:
LoRd_MuldeR 2020-10-14 21:55:39 +02:00
parent 53dcefacbb
commit 44fef04cbc
Signed by: mulder
GPG Key ID: 2B5913365F57E03F
3 changed files with 80 additions and 66 deletions
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4
Makefile
View File

@ -16,12 +16,12 @@ ifeq ($(DEBUG),1)
CFLAGS += -Og -g
undefine LDFLGS
else
CFLAGS += -O3 -static -DNDEBUG
CFLAGS += -O3 -DNDEBUG
LDFLGS += -static -s
endif
ifeq ($(OS),Windows_NT)
CFLAGS += -municode -mconsole
LDFLGS += -municode -mconsole
endif
# ---------------------------------------------------------------------------

131
frontend/src/main.c
View File

@ -14,6 +14,7 @@
#include <ctype.h>
#include <signal.h>
#define BUFF_SIZE 4096U
static volatile int g_interrupted = 0;
static char* read_passphrase(const CHR* const file_name)
@ -24,16 +25,16 @@ static char* read_passphrase(const CHR* const file_name)
{
return NULL;
}
FILE *const fin = FOPEN(file_name, T("rb"));
if (!fin)
FILE *const file = FOPEN(file_name, T("rb"));
if (!file)
{
return NULL;
}
do
{
if (!fgets(buffer, (int)buff_size, fin))
if (!fgets(buffer, (int)buff_size, file))
{
fclose(fin);
fclose(file);
free(buffer);
return NULL;
}
@ -44,7 +45,7 @@ static char* read_passphrase(const CHR* const file_name)
}
}
while (!buffer[0U]);
fclose(fin);
fclose(file);
return buffer;
}
@ -67,46 +68,46 @@ static int weak_passphrase(const char *str)
return !strong;
}
static int open_files(FILE** const fin, FILE** const fout, const CHR* const input, const CHR* const output)
static int open_files(FILE **const file_in, FILE **const file_out, const CHR* const input_path, const CHR* const output_path)
{
*fin = FOPEN(input, T("rb"));
if (!(*fin))
*file_in = FOPEN(input_path, T("rb"));
if (!(*file_in))
{
FPUTS(T("Error: Failed to open input file for reading!\n\n"), stderr);
return 1;
}
*fout = FOPEN(output, T("wb"));
if (!(*fout))
*file_out = FOPEN(output_path, T("wb"));
if (!(*file_out))
{
FPUTS(T("Error: Failed to open output file for writing!\n\n"), stderr);
fclose(*fin);
fclose(*file_out);
return 1;
}
return 0;
}
static int encrypt(const char* const passphrase, const CHR* const input, const CHR* const output)
static int encrypt(const char* const passphrase, const CHR* const input_path, const CHR* const output_path)
{
mcrypt_t ctx = MCRYPT_NULL;
FILE *fin = NULL, *fout = NULL;
FILE * file_in = NULL, * file_out = NULL;
int result = 1;
if (open_files(&fin, &fout, input, output) != 0)
if (open_files(&file_in, &file_out, input_path, output_path) != 0)
{
goto clean_up;;
}
const uint64_t file_size = get_file_size(fin);
const uint64_t file_size = get_file_size(file_in);
if (file_size == UINT64_MAX)
{
FPUTS(T("I/O error: Failed to determine size of input file!\n\n"), stderr);
goto clean_up;
}
else if (file_size < 1LL)
else if (file_size < 1U)
{
FPUTS(T("Error: Input file is empty!\n\n"), stderr);
FPUTS(T("Error: Input file is empty or an unsupported type!\n\n"), stderr);
goto clean_up;
}
@ -117,7 +118,7 @@ static int encrypt(const char* const passphrase, const CHR* const input, const C
goto clean_up;
}
if (fwrite(&seed, sizeof(uint64_t), 1U, fout) < 1U)
if (fwrite(&seed, sizeof(uint64_t), 1U, file_out) < 1U)
{
FPUTS(T("I/O error: Failed to write seed value!\n\n"), stderr);
goto clean_up;
@ -134,16 +135,13 @@ static int encrypt(const char* const passphrase, const CHR* const input, const C
clock_t clk_now, clk_update = clock();
uint64_t crc_actual = CRC_INITIALIZER, bytes_read = sizeof(uint64_t);
uint8_t buffer[1024U];
uint8_t buffer[BUFF_SIZE];
while ((!feof(fin)) && (bytes_read < file_size))
while (bytes_read < file_size)
{
const size_t count = fread(buffer, sizeof(uint8_t), 1024U, fin);
if (ferror(fin))
{
FPUTS(T("\n\nI/O error: Failed to read input data!\n\n"), stderr);
goto clean_up;
}
const uint64_t bytes_remaining = file_size - bytes_read;
const size_t request_len = (bytes_remaining < BUFF_SIZE) ? ((size_t)bytes_remaining) : BUFF_SIZE;
const size_t count = fread(buffer, sizeof(uint8_t), request_len, file_in);
if (count > 0U)
{
crc_actual = crc64_update(crc_actual, buffer, count);
@ -153,12 +151,16 @@ static int encrypt(const char* const passphrase, const CHR* const input, const C
FPUTS(T("\n\nMCrypt error: Failed to encrypt data!\n\n"), stderr);
goto clean_up;
}
if (fwrite(buffer, sizeof(uint8_t), count, fout) < count)
if (fwrite(buffer, sizeof(uint8_t), count, file_out) < count)
{
FPUTS(T("\n\nI/O error: Failed to write encrypted data!\n\n"), stderr);
goto clean_up;
}
}
if (count < request_len)
{
break; /*EOF*/
}
if ((clk_now = clock()) - clk_update > CLOCKS_PER_SEC)
{
FPRINTF(stderr, T("\b\b\b\b\b\b%5.1f%%"), (bytes_read / ((double)file_size)) * 100.0);
@ -172,7 +174,11 @@ static int encrypt(const char* const passphrase, const CHR* const input, const C
}
}
crc_actual = crc64_finish(crc_actual);
if (ferror(file_in))
{
FPUTS(T("\n\nI/O error: Failed to read input data!\n\n"), stderr);
goto clean_up;
}
if (bytes_read < file_size)
{
@ -180,9 +186,10 @@ static int encrypt(const char* const passphrase, const CHR* const input, const C
goto clean_up;
}
crc_actual = crc64_finish(crc_actual);
FPRINTF(stderr, T("\b\b\b\b\b\b%5.1f%%\n\n"), 100.0);
if (fwrite(&crc_actual, sizeof(uint64_t), 1U, fout) < 1U)
if (fwrite(&crc_actual, sizeof(uint64_t), 1U, file_out) < 1U)
{
FPUTS(T("I/O error: Failed to write CRC checksum!\n\n"), stderr);
goto clean_up;
@ -200,44 +207,44 @@ clean_up:
mcrypt_free(ctx);
}
if (fout)
if (file_out)
{
fclose(fout);
fclose(file_out);
}
if (fin)
if (file_in)
{
fclose(fin);
fclose(file_in);
}
return result;
}
static int decrypt(const char* const passphrase, const CHR* const input, const CHR* const output)
static int decrypt(const char* const passphrase, const CHR* const input_path, const CHR* const output_path)
{
mcrypt_t ctx = MCRYPT_NULL;
FILE *fin = NULL, *fout = NULL;
FILE *file_in = NULL, *file_out = NULL;
int result = 1;
if (open_files(&fin, &fout, input, output) != 0)
if (open_files(&file_in, &file_out, input_path, output_path) != 0)
{
goto clean_up;
}
const uint64_t file_size = get_file_size(fin);
const uint64_t file_size = get_file_size(file_in);
if (file_size == UINT64_MAX)
{
FPUTS(T("I/O error: Failed to determine size of input file!\n\n"), stderr);
goto clean_up;
}
else if (file_size < 16LL)
else if (file_size < 16U)
{
FPUTS(T("Error: Input file is too small! Truncated?\n\n"), stderr);
goto clean_up;
}
uint64_t seed;
if (fread(&seed, sizeof(uint64_t), 1U, fin) < 1U)
if (fread(&seed, sizeof(uint64_t), 1U, file_in) < 1U)
{
FPUTS(T("I/O error: Failed to read seed value!\n\n"), stderr);
goto clean_up;
@ -254,19 +261,14 @@ static int decrypt(const char* const passphrase, const CHR* const input, const C
clock_t clk_now, clk_update = clock();
uint64_t crc_actual = CRC_INITIALIZER, bytes_read = sizeof(uint64_t);
uint8_t buffer[1024U];
uint8_t buffer[BUFF_SIZE];
const uint64_t read_limit = file_size - sizeof(uint64_t);
while ((!feof(fin)) && (bytes_read < read_limit))
while (bytes_read < read_limit)
{
const uint64_t bytes_remaining = read_limit - bytes_read;
const size_t read_len = (bytes_remaining < 1024U) ? ((size_t)bytes_remaining) : 1024U;
const size_t count = fread(buffer, sizeof(uint8_t), read_len, fin);
if (ferror(fin))
{
FPUTS(T("\n\nI/O error: Failed to read encrypted data!\n\n"), stderr);
goto clean_up;
}
const size_t request_len = (bytes_remaining < BUFF_SIZE) ? ((size_t)bytes_remaining) : BUFF_SIZE;
const size_t count = fread(buffer, sizeof(uint8_t), request_len, file_in);
if (count > 0U)
{
bytes_read += count;
@ -276,12 +278,16 @@ static int decrypt(const char* const passphrase, const CHR* const input, const C
goto clean_up;
}
crc_actual = crc64_update(crc_actual, buffer, count);
if (fwrite(buffer, sizeof(uint8_t), count, fout) < count)
if (fwrite(buffer, sizeof(uint8_t), count, file_out) < count)
{
FPUTS(T("failed!\n\nI/O error: Failed to write decrypted data!\n\n"), stderr);
goto clean_up;
}
}
if (count < request_len)
{
break; /*EOF*/
}
if ((clk_now = clock()) - clk_update > CLOCKS_PER_SEC)
{
FPRINTF(stderr, T("\b\b\b\b\b\b%5.1f%%"), (bytes_read / ((double)read_limit)) * 100.0);
@ -295,7 +301,11 @@ static int decrypt(const char* const passphrase, const CHR* const input, const C
}
}
crc_actual = crc64_finish(crc_actual);
if (ferror(file_in))
{
FPUTS(T("\n\nI/O error: Failed to read input data!\n\n"), stderr);
goto clean_up;
}
if (bytes_read < read_limit)
{
@ -303,10 +313,11 @@ static int decrypt(const char* const passphrase, const CHR* const input, const C
goto clean_up;
}
crc_actual = crc64_finish(crc_actual);
FPRINTF(stderr, T("\b\b\b\b\b\b%5.1f%%\n\n"), 100.0);
uint64_t crc_expected;
if (fread(&crc_expected, sizeof(uint64_t), 1U, fin) < 1U)
if (fread(&crc_expected, sizeof(uint64_t), 1U, file_in) < 1U)
{
FPUTS(T("I/O error: Failed to read CRC checksum!\n\n"), stderr);
goto clean_up;
@ -331,14 +342,14 @@ clean_up:
mcrypt_free(ctx);
}
if (fout)
if (file_out)
{
fclose(fout);
fclose(file_out);
}
if (fin)
if (file_in)
{
fclose(fin);
fclose(file_in);
}
return result;
@ -439,7 +450,7 @@ int MAIN(int argc, CHR* argv[])
FPRINTF(stderr, T("MCrypt Utility (%") T(PRIstr) T("-%") T(PRIstr) T("), by LoRd_MuldeR <MuldeR2@GMX.de>\n"), OS_TYPE, CPU_ARCH);
FPRINTF(stderr, T("Using libMCrypt v%") T(PRIstr) T(" [%") T(PRIstr) T("]\n\n"), LIBMCRYPT_VERSION, LIBMCRYPT_BUILDNO);
if ((argc > 1) && (!STRICMP(argv[1U], T("--self-test"))))
if ((argc > 1) && ((!STRICMP(argv[1U], T("-t"))) || (!STRICMP(argv[1U], T("--self-test")))))
{
return self_test(); /*only self-test!*/
}
@ -497,11 +508,11 @@ int MAIN(int argc, CHR* argv[])
const clock_t clk_start = clock();
int result = -1;
if (!STRICMP(command, T("--encrypt")))
if ((!STRICMP(command, T("-e"))) || (!STRICMP(command, T("--encrypt"))))
{
result = encrypt(passphrase_buffer, input_file, output_file);
}
else if (!STRICMP(command, T("--decrypt")))
else if ((!STRICMP(command, T("-d"))) || (!STRICMP(command, T("--decrypt"))))
{
result = decrypt(passphrase_buffer, input_file, output_file);
}
@ -511,11 +522,13 @@ int MAIN(int argc, CHR* argv[])
goto exiting;
}
if (!g_interrupted)
{
FPUTS(T("--------\n\n"), stderr);
fflush(stderr);
const clock_t clk_end = clock();
FPRINTF(stderr, T("Operation completed after %.1f seconds.\n\n"), (clk_end - clk_start) / ((double)CLOCKS_PER_SEC));
}
exiting:

3
frontend/src/utils.c
View File

@ -84,7 +84,8 @@ uint64_t get_file_size(FILE* const file)
uint16_t file_type = stat.st_mode & S_IFMT;
if ((file_type != S_IFDIR) && (file_type != S_IFIFO))
{
return (stat.st_size >= 0LL) ? ((uint64_t)stat.st_size) : 0U;
const int64_t ssize = stat.st_size;
return (ssize >= 0) ? ((uint64_t)ssize) : 0U;
}
return 0U;
}