Question
Can i get this code converted from C to Python? Its a playfair cipher code // C program to implement Playfair Cipher #include #include #include
Can i get this code converted from C to Python?
Its a playfair cipher code
// C program to implement Playfair Cipher
#include
#include
#include
#define SIZE 30
// Function to convert the string to lowercase
void toLowerCase(char plain[], int ps)
{
int i;
for (i = 0; i
if (plain[i] > 64 && plain[i]
plain[i] += 32;
}
}
// Function to remove all spaces in a string
int removeSpaces(char* plain, int ps)
{
int i, count = 0;
for (i = 0; i
if (plain[i] != ' ')
plain[count++] = plain[i];
plain[count] = '\0';
return count;
}
// Function to generate the 5x5 key square
void generateKeyTable(char key[], int ks, char keyT[5][5])
{
int i, j, k, flag = 0, *dicty;
// a 26 character hashmap
// to store count of the alphabet
dicty = (int*)calloc(26, sizeof(int));
for (i = 0; i
if (key[i] != 'j')
dicty[key[i] - 97] = 2;
}
dicty['j' - 97] = 1;
i = 0;
j = 0;
for (k = 0; k
if (dicty[key[k] - 97] == 2) {
dicty[key[k] - 97] -= 1;
keyT[i][j] = key[k];
j++;
if (j == 5) {
i++;
j = 0;
}
}
}
for (k = 0; k
if (dicty[k] == 0) {
keyT[i][j] = (char)(k + 97);
j++;
if (j == 5) {
i++;
j = 0;
}
}
}
}
// Function to search for the characters of a digraph
// in the key square and return their position
void search(char keyT[5][5], char a, char b, int arr[])
{
int i, j;
if (a == 'j')
a = 'i';
else if (b == 'j')
b = 'i';
for (i = 0; i
for (j = 0; j
if (keyT[i][j] == a) {
arr[0] = i;
arr[1] = j;
}
else if (keyT[i][j] == b) {
arr[2] = i;
arr[3] = j;
}
}
}
}
// Function to find the modulus with 5
int mod5(int a)
{
return (a % 5);
}
// Function to make the plain text length to be even
int prepare(char str[], int ptrs)
{
if (ptrs % 2 != 0) {
str[ptrs++] = 'z';
str[ptrs] = '\0';
}
return ptrs;
}
// Function for performing the encryption
void encrypt(char str[], char keyT[5][5], int ps)
{
int i, a[4];
for (i = 0; i
search(keyT, str[i], str[i + 1], a);
if (a[0] == a[2]) {
str[i] = keyT[a[0]][mod5(a[1] + 1)];
str[i + 1] = keyT[a[0]][mod5(a[3] + 1)];
}
else if (a[1] == a[3]) {
str[i] = keyT[mod5(a[0] + 1)][a[1]];
str[i + 1] = keyT[mod5(a[2] + 1)][a[1]];
}
else {
str[i] = keyT[a[0]][a[3]];
str[i + 1] = keyT[a[2]][a[1]];
}
}
}
// Function to encrypt using Playfair Cipher
void encryptByPlayfairCipher(char str[], char key[])
{
char ps, ks, keyT[5][5];
// Key
ks = strlen(key);
ks = removeSpaces(key, ks);
toLowerCase(key, ks);
// Plaintext
ps = strlen(str);
toLowerCase(str, ps);
ps = removeSpaces(str, ps);
ps = prepare(str, ps);
generateKeyTable(key, ks, keyT);
encrypt(str, keyT, ps);
}
// Driver code
int main()
{
char str[SIZE], key[SIZE];
// Key to be encrypted
strcpy(key, "Monarchy");
printf("Key text: %s ", key);
// Plaintext to be encrypted
strcpy(str, "instruments");
printf("Plain text: %s ", str);
// encrypt using Playfair Cipher
encryptByPlayfairCipher(str, key);
printf("Cipher text: %s ", str);
return 0;
}
// This code
Its a playfair cipher code
// C program to implement Playfair Cipher #include #include #include #define SIZE 30 // Function to convert the string to lowercase void toLowerCase(char plain[], int ps) { int i; for (i = 0; i if (plain[i] > 64 && plain[i] plain[i] += 32; } } // Function to remove all spaces in a string int removeSpaces(char* plain, int ps) { int i, count = 0; for (i = 0; i if (plain[i] != ' ') plain[count++] = plain[i]; plain[count] = '\0'; return count; } // Function to generate the 5x5 key square void generateKeyTable(char key[], int ks, char keyT[5][5]) { int i, j, k, flag = 0, *dicty; // a 26 character hashmap // to store count of the alphabet dicty = (int*)calloc(26, sizeof(int)); for (i = 0; i if (key[i] != 'j') dicty[key[i] - 97] = 2; } dicty['j' - 97] = 1; i = 0; j = 0; for (k = 0; k if (dicty[key[k] - 97] == 2) { dicty[key[k] - 97] -= 1; keyT[i][j] = key[k]; j++; if (j == 5) { i++; j = 0; } } } for (k = 0; k if (dicty[k] == 0) { keyT[i][j] = (char)(k + 97); j++; if (j == 5) { i++; j = 0; } } } } // Function to search for the characters of a digraph // in the key square and return their position void search(char keyT[5][5], char a, char b, int arr[]) { int i, j; if (a == 'j') a = 'i'; else if (b == 'j') b = 'i'; for (i = 0; i for (j = 0; j if (keyT[i][j] == a) { arr[0] = i; arr[1] = j; } else if (keyT[i][j] == b) { arr[2] = i; arr[3] = j; } } } } // Function to find the modulus with 5 int mod5(int a) { return (a % 5); } // Function to make the plain text length to be even int prepare(char str[], int ptrs) { if (ptrs % 2 != 0) { str[ptrs++] = 'z'; str[ptrs] = '\0'; } return ptrs; } // Function for performing the encryption void encrypt(char str[], char keyT[5][5], int ps) { int i, a[4]; for (i = 0; i search(keyT, str[i], str[i + 1], a); if (a[0] == a[2]) { str[i] = keyT[a[0]][mod5(a[1] + 1)]; str[i + 1] = keyT[a[0]][mod5(a[3] + 1)]; } else if (a[1] == a[3]) { str[i] = keyT[mod5(a[0] + 1)][a[1]]; str[i + 1] = keyT[mod5(a[2] + 1)][a[1]]; } else { str[i] = keyT[a[0]][a[3]]; str[i + 1] = keyT[a[2]][a[1]]; } } } // Function to encrypt using Playfair Cipher void encryptByPlayfairCipher(char str[], char key[]) { char ps, ks, keyT[5][5]; // Key ks = strlen(key); ks = removeSpaces(key, ks); toLowerCase(key, ks); // Plaintext ps = strlen(str); toLowerCase(str, ps); ps = removeSpaces(str, ps); ps = prepare(str, ps); generateKeyTable(key, ks, keyT); encrypt(str, keyT, ps); } // Driver code int main() { char str[SIZE], key[SIZE]; // Key to be encrypted strcpy(key, "Monarchy"); printf("Key text: %s ", key); // Plaintext to be encrypted strcpy(str, "instruments"); printf("Plain text: %s ", str); // encrypt using Playfair Cipher encryptByPlayfairCipher(str, key); printf("Cipher text: %s ", str); return 0; } // This code |
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