From 8330cef7c4e11024d66a3db37bb9b0f22429fbec Mon Sep 17 00:00:00 2001
From: Nathan Lasseter <nathan.je.lasseter@googlemail.com>
Date: Tue, 5 Jun 2012 19:42:32 +0100
Subject: SimpleCrypt 0.3 (copied in for historical reasons)

---
 Makefile  | 11 +----------
 decrypt.c | 43 -------------------------------------------
 encrypt.c | 33 ++++++++++++++++++++++++++-------
 3 files changed, 27 insertions(+), 60 deletions(-)
 delete mode 100644 decrypt.c

diff --git a/Makefile b/Makefile
index df7fbd6..72594d9 100644
--- a/Makefile
+++ b/Makefile
@@ -1,22 +1,13 @@
 CFLAGS=-Wall -Wextra -O3
 
-all:
-	make encrypt
-	make decrypt
-
 encrypt:	encrypt.c
-	gcc ${CFLAGS} -o $@ $^
-decrypt:	decrypt.c
-	gcc ${CFLAGS} -o $@ $^
+	gcc ${CFLAGS} ${EFLAGS} -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
deleted file mode 100644
index b068bb9..0000000
--- a/decrypt.c
+++ /dev/null
@@ -1,43 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-int main(int argc, char** argv) {
-	/* 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");
-	/* 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[255];
-	fgets(passphrase, 255, stdin);
-	int passlen = strlen(passphrase) - 1;
-	int c,j=0;
-	/* Now we encrypt! */
-	while((c=fgetc(file)) != EOF) {
-		if(j==passlen) {
-			fputc(c-passphrase[0], temp);
-			j=1;
-		} else {
-			fputc(c-passphrase[j], temp);
-			j++;
-		}
-	}
-	/* 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 77249fd..a8cfec1 100644
--- a/encrypt.c
+++ b/encrypt.c
@@ -3,7 +3,18 @@
 #include <string.h>
 #include <unistd.h>
 
+void sanitise(char *x) {
+	char *curpos = x;
+	while (*x != '\0') {
+		*curpos = *x;
+		x++;
+		if (*curpos != '/') curpos++;
+	}
+	*curpos = '\0';
+}
+
 int main(int argc, char** argv) {
+	char * junk;
 	/* We need a file to encrypt */
 	if(argc==1) {
 		fprintf(stderr, "Arguments fool!");
@@ -13,21 +24,26 @@ int main(int argc, char** argv) {
 	FILE* file = fopen(argv[1], "r");
 	/* And a temporary file to hold the encrypted data */
 	char tpath[255] = "/tmp/";
+	sanitise(argv[1]);
 	strcat(tpath, argv[1]);
 	FILE* temp = fopen(tpath, "w");
-	/* Now we need the passphrase. Get it */
-	printf("Enter Passphrase:\n");
+	
 	char passphrase[255];
-	fgets(passphrase, 255, stdin);
+	do {
+		/* Now we need the passphrase. Get it */
+		printf("Enter Passphrase:\n");
+		junk = fgets(passphrase, 255, stdin);
+	} while (strlen(passphrase) <= 0);
+	
 	int passlen = strlen(passphrase) - 1;
 	int c,j=0;
 	/* Now we encrypt! */
 	while((c=fgetc(file)) != EOF) {
 	if(j==passlen) {
-			fputc(c+passphrase[0], temp);
+			fputc(c ^ passphrase[0], temp);
 			j=1;
 		} else {
-			fputc(c+passphrase[j], temp);
+			fputc(c ^ passphrase[j], temp);
 			j++;
 		}
 	}
@@ -38,7 +54,10 @@ int main(int argc, char** argv) {
 	/* Move the file back */
 	char cmd[255];
 	sprintf(cmd, "%s %s %s", "/bin/mv", tpath, argv[1]);
-	system(cmd);
-	return 0;
+	if (system(cmd) != 0) {
+		fprintf(stderr, "Your encrypted file is located in %s.", tpath);
+		return EXIT_FAILURE;
+	}
+	return EXIT_SUCCESS;
 }
 
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