This C program is designed to validate and encrypt passwords according to specific security rules. It ensures the input password meets predefined criteria and then encrypts it using a series of transformations. The encryption process involves:
- Adding 4 to each digit in the password.
- Converting all lowercase letters to uppercase.
- Adding the length of the string at the beginning of the password.
- Appending
*to the end of the password. - Reversing the resulting string.
- Password Validation: Ensures the password is between 6 and 9 characters long and contains at least one numeric digit.
- Encryption Process: Implements a series of transformations including digit adjustment, letter case conversion, length prefixing, and string reversal.
- Error Handling: Provides informative error messages for invalid passwords and prompts the user to re-enter valid input.
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Compilation:
- To compile the program, use the following command:
gcc -o password_encryptor password_encryptor.c
- To compile the program, use the following command:
-
Execution:
- Run the compiled executable using the following commands:
- Windows:
password_encryptor.exe
- Linux/Mac:
./password_encryptor
- Windows:
- Run the compiled executable using the following commands:
Given the input password Hello3, the program generates the following encrypted password:
*7OOLLEH6