67 lines
1.3 KiB
C
67 lines
1.3 KiB
C
/*
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* Filename: caesarcrypt.c
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* Authors(s): Roland (r.weirhowell@gmail.com)
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* Description: Encrypt and decrypt text using the Caesar Cipher algorithm
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/.
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*/
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#include "crypt.h"
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#include "dyninput.h"
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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int main()
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{
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fputs(
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"1. Encrypt message\n"
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"2. Decrypt message\n"
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"Pick operation mode: "
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,stdout
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);
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char buf[4];
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int64_t maxsize = INT64_MAX;
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fgets(buf, 3, stdin);
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int choice = strtol(buf, NULL, 10);
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fputs("Enter your message text: ", stdout);
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char* msg = dyninput_str(maxsize);
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if (!msg)
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{
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puts("ERROR: String input failed! Exiting...");
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return -1;
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}
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fputs("Enter your key (shift value): ", stdout);
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fgets(buf, 4, stdin);
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int key = strtol(buf, NULL, 10);
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if (choice == 1)
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{
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caesar_encrypt(msg, maxsize, key);
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puts("\nYour encrypted message is:");
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for (int i = 0; i < maxsize && msg[i]; i++)
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{
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putchar(msg[i]);
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}
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}
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else if (choice == 2)
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{
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caesar_decrypt(msg, maxsize, key);
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puts("\nYour decrypted message is:");
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for (int i = 0; i < maxsize && msg[i]; i++)
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{
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putchar(msg[i]);
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}
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}
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free(msg);
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msg = NULL;
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return 0;
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}
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