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-rw-r--r--Makefile18
-rw-r--r--decrypt.c41
-rw-r--r--encrypt.c44
3 files changed, 65 insertions, 38 deletions
diff --git a/Makefile b/Makefile
index eaa7d67..df7fbd6 100644
--- a/Makefile
+++ b/Makefile
@@ -1,10 +1,22 @@
-CFLAGS=-Wall -Wextra
+CFLAGS=-Wall -Wextra -O3
all:
make encrypt
make decrypt
encrypt: encrypt.c
- gcc -o $@ $^ ${CFLAGS}
+ gcc ${CFLAGS} -o $@ $^
decrypt: decrypt.c
- gcc -o $@ $^ ${CFLAGS}
+ gcc ${CFLAGS} -o $@ $^
+
+install:
+ cp encrypt /usr/local/bin/encrypt
+ cp decrypt /usr/local/bin/decrypt
+
+uninstall:
+ rm /usr/local/bin/sc-encrypt
+ rm /usr/local/bin/sc-decrypt
+
+clean:
+ rm encrypt
+ rm decrypt
diff --git a/decrypt.c b/decrypt.c
index 3f84bca..b068bb9 100644
--- a/decrypt.c
+++ b/decrypt.c
@@ -1,36 +1,43 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <unistd.h>
int main(int argc, char** argv) {
- if(argc==0) {
+ /* We need a file to encrypt */
+ if(argc==1) {
fprintf(stderr, "Arguments fool!");
return 1;
}
+ /* Now lets open that file */
FILE* file = fopen(argv[1], "r");
- fseek(file, 0, SEEK_END);
- int length = ftell(file);
- fseek(file, 0, SEEK_SET);
- char filearr[length];
- fread(filearr, length, 1, file);
- fclose(file);
+ /* And a temporary file to hold the encrypted data */
+ char tpath[255] = "/tmp/";
+ strcat(tpath, argv[1]);
+ FILE* temp = fopen(tpath, "w");
+ /* Now we need the passphrase. Get it */
printf("Enter Passphrase:\n");
- char passphrase[81];
- fgets(passphrase, 81, stdin);
+ char passphrase[255];
+ fgets(passphrase, 255, stdin);
int passlen = strlen(passphrase) - 1;
- int i=0,j=0;
- for(i=0;i<length;i++) {
+ int c,j=0;
+ /* Now we encrypt! */
+ while((c=fgetc(file)) != EOF) {
if(j==passlen) {
- j=0;
- i--;
+ fputc(c-passphrase[0], temp);
+ j=1;
} else {
- filearr[i] -= passphrase[j];
+ fputc(c-passphrase[j], temp);
j++;
}
}
- file = fopen(argv[1], "w");
- fwrite(filearr, 1, length, file);
- fflush(file);
+ /* Close the files */
+ fflush(temp);
+ fclose(temp);
fclose(file);
+ /* Move the file back */
+ char cmd[255];
+ sprintf(cmd, "%s %s %s", "/bin/mv", tpath, argv[1]);
+ system(cmd);
return 0;
}
diff --git a/encrypt.c b/encrypt.c
index f37b5c0..77249fd 100644
--- a/encrypt.c
+++ b/encrypt.c
@@ -1,36 +1,44 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <unistd.h>
int main(int argc, char** argv) {
- if(argc==0) {
+ /* We need a file to encrypt */
+ if(argc==1) {
fprintf(stderr, "Arguments fool!");
return 1;
}
+ /* Now lets open that file */
FILE* file = fopen(argv[1], "r");
- fseek(file, 0, SEEK_END);
- int length = ftell(file);
- fseek(file, 0, SEEK_SET);
- char filearr[length];
- fread(filearr, length, 1, file);
- fclose(file);
+ /* And a temporary file to hold the encrypted data */
+ char tpath[255] = "/tmp/";
+ strcat(tpath, argv[1]);
+ FILE* temp = fopen(tpath, "w");
+ /* Now we need the passphrase. Get it */
printf("Enter Passphrase:\n");
- char passphrase[81];
- fgets(passphrase, 81, stdin);
+ char passphrase[255];
+ fgets(passphrase, 255, stdin);
int passlen = strlen(passphrase) - 1;
- int i=0,j=0;
- for(i=0;i<length;i++) {
- if(j==passlen) {
- j=0;
- i--;
+ int c,j=0;
+ /* Now we encrypt! */
+ while((c=fgetc(file)) != EOF) {
+ if(j==passlen) {
+ fputc(c+passphrase[0], temp);
+ j=1;
} else {
- filearr[i] += passphrase[j];
+ fputc(c+passphrase[j], temp);
j++;
}
}
- file = fopen(argv[1], "w");
- fwrite(filearr, 1, length, file);
- fflush(file);
+ /* Close the files */
+ fflush(temp);
+ fclose(temp);
fclose(file);
+ /* Move the file back */
+ char cmd[255];
+ sprintf(cmd, "%s %s %s", "/bin/mv", tpath, argv[1]);
+ system(cmd);
return 0;
}
+