Muldersoft/SlunkCrypt
Muldersoft/SlunkCrypt
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Small improvement to the password generator.

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This commit is contained in:
LoRd_MuldeR 2022-02-08 22:53:02 +01:00
parent c63c3bffe6
commit b39b7cafaa
Signed by: mulder
GPG Key ID: 2B5913365F57E03F
2 changed files with 54 additions and 10 deletions
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2
frontend/src/main.c
View File

@ -158,7 +158,7 @@ int MAIN(const int argc, CHR *const argv[])
/* Parse arguments */
/* ----------------------------------------------------- */
if (argc < 1)
if ((argc < 1) || (!argv[0]))
{
FPUTS(T("Error: Argument array is empty. The program was called incorrectly!\n\n"), stderr);
goto clean_up;

62
frontend/src/pwgen.c
View File

@ -21,6 +21,8 @@
// Constants
// ==========================================================================
static const size_t MIX_ROUNDS = 97U;
static const char PASSWD_SYMBOLS[] =
{
'!', '#', '$', '%', '&', '(', ')', '*', '+', ',', '-', '.', '/', '0', '1',
@ -89,6 +91,18 @@ finish:
// Passphrase generator
// ==========================================================================
#define NEXT_RANDOM(OUTVAR,LIMIT) do \
{ \
uint64_t _rnd; \
if (slunkcrypt_generate_nonce(&_rnd) != SLUNKCRYPT_SUCCESS) \
{ \
FPUTS(T("Error: Failed to generate next random number!\n\n"), stderr); \
goto clean_up; \
} \
OUTVAR = (size_t) (_rnd % (LIMIT)); \
} \
while (0)
int weak_passphrase(const char *str)
{
unsigned int flags = 0U;
@ -110,26 +124,50 @@ int weak_passphrase(const char *str)
int generate_passphrase(const size_t length)
{
int result = EXIT_FAILURE;
char *buffer = NULL, *passwd_symbols = NULL;
size_t i, j, n, m;
const size_t passwd_len = BOUND(SLUNKCRYPT_PWDLEN_MIN, length, SLUNKCRYPT_PWDLEN_MAX);
char *const buffer = (char*) malloc((passwd_len + 1U) * sizeof(char));
if (!buffer)
if (!(buffer = (char*) malloc((passwd_len + 1U) * sizeof(char))))
{
FPUTS(T("Error: Failed to allocate memory buffer!\n\n"), stderr);
return EXIT_FAILURE;
goto clean_up;
}
if (!(passwd_symbols = (char*) malloc(ARRAY_SIZE(PASSWD_SYMBOLS) * sizeof(char))))
{
FPUTS(T("Error: Failed to allocate memory buffer!\n\n"), stderr);
goto clean_up;
}
for (i = 0U; i < ARRAY_SIZE(PASSWD_SYMBOLS); ++i)
{
NEXT_RANDOM(j, i + 1U);
if (j != i)
{
passwd_symbols[i] = passwd_symbols[j];
}
passwd_symbols[j] = PASSWD_SYMBOLS[i];
}
do
{
for (size_t i = 0U; i < passwd_len; ++i)
for (n = 0U; n < passwd_len; ++n)
{
uint64_t value;
if (slunkcrypt_generate_nonce(&value) != SLUNKCRYPT_SUCCESS)
for (m = 0U; m < MIX_ROUNDS; ++m)
{
FPUTS(T("Error: Failed to generate next random number!\n\n"), stderr);
goto clean_up;
for (i = ARRAY_SIZE(PASSWD_SYMBOLS) - 1U; i > 0; --i)
{
NEXT_RANDOM(j, i + 1U);
if (j != i)
{
const char tmpval = passwd_symbols[i];
passwd_symbols[i] = passwd_symbols[j];
passwd_symbols[j] = tmpval;
}
}
}
buffer[i] = PASSWD_SYMBOLS[value % ARRAY_SIZE(PASSWD_SYMBOLS)];
buffer[n] = passwd_symbols[0U];
}
buffer[passwd_len] = '\0';
}
@ -147,5 +185,11 @@ clean_up:
free(buffer);
}
if (passwd_symbols)
{
slunkcrypt_bzero(passwd_symbols, ARRAY_SIZE(PASSWD_SYMBOLS) * sizeof(char));
free(passwd_symbols);
}
return result;
}