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
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 |
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started