crypt() examples used in my article on PHP's faulty implementation of crypt().

samplecrypt.cpp

#include <stdio.h>
#include <string.h>
#include <crypt.h>

void printCryptResult(char *szSalt)
{
	if (szSalt != NULL)
		puts(szSalt);
	else
		puts("(NULL)");
}

int main()
{
	char *szSalts[3] = {"$6$1234567890123456789012345678901234567890123",  // Good salt
	                    "$6",                                              // $ is illegal
	                    "4 "};                                             // Space is illegal
	char *szCryptResult = NULL;
	struct crypt_data data;

	puts("<code>crypt</code> - C");

	for (int idx = 0; idx < 3; idx++) {
		memset(&data, 0, sizeof(data));
		szCryptResult = crypt_r("a", szSalts[idx], &data);

		printf("crypt(\"a\", \"%s\") = ", szSalts[idx]);
		printCryptResult(szCryptResult);
	}

	return 0;
}

samplecrypt.php

<?php
$salts = array('$6$1234567890123456789012345678901234567890123',  // Correct salt format
               '$61234567890123456789012345678901234567890123',   // Forgot the 2nd $
               '$61$234567890123456789012345678901234567890123',  // $ and 1 transposed
               ' $6$1234567890123456789012345678901234567890123', // Leading space
               '$$1234567890123456789012345678901234567890123',   // Omitted the hash ID
               '❤☀☆☂☻♞☯');                                        // Just random unicode

echo "crypt - PHP (v" . phpversion() . ")<br />";

foreach ($salts as $theSalt) {
	$cryptResult = crypt("a", $theSalt);
	echo 'crypt("a", "' . $theSalt . '") = ';
	var_dump($cryptResult);
	echo "<br />";
}
?>