72 lines
1.4 KiB
C
72 lines
1.4 KiB
C
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "crypto.h"
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#include <errno.h>
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#define BUFFER_SIZE 255
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int main(int argc, char** argv) {
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/* encrypt or decrypt function */
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int (*func)(KEY, const char*, char*);
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if (argc < 2) {
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fprintf(stderr, "Usage: KEY [file name]\n\n");
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exit(1);
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}
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if (strstr(argv[0], "encrypt")) {
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func = encrypt;
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}
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else if (strstr(argv[0], "decrypt")) {
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func = decrypt;
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}
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else {
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func = encrypt;
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}
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KEY key;
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key.type = 1;
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key.chars = argv[1];
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FILE* f;
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if (argc == 3) {
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char *file = argv[2];
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if (!(f = fopen(file, "r"))) {
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fprintf(stderr, "Could not open %s: %s\n", file, strerror(errno));
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exit(1);
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}
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}
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else {
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f = stdin;
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}
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char buffer[BUFFER_SIZE];
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char result[BUFFER_SIZE];
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while (fgets(buffer, BUFFER_SIZE - 1, f)) {
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/* remove newline character at the end of line */
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char* lineEnd = strchr(buffer, 10);
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if (lineEnd) {
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*lineEnd = '\0';
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}
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/* encrypt or decrypt */
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int error = func(key, buffer, result);
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if (error) {
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fprintf(stderr, "Error: %d\n", error);
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exit(error);
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}
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printf("%s\n", result);
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}
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if (argc == 3) {
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fclose(f);
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}
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return 0;
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}
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