Tidied up code, removed obsolete getpass and implemented replacement

Makefile

@@ -1,12 +1,22 @@
-salty: salty.o
-	cc ./build/salty.o -o ./build/salty -lsodium -I.
-	rm ./build/salty.o
+CC = gcc
+CFLAGS = -Wall -Wextra -std=c99 -O2
+LDFLAGS = -lsodium
+BUILD_DIR = build
+PREFIX = /usr/local
 
-salty.o: build
-	cc -c salty.c -o ./build/salty.o -lsodium -I.
+all: $(BUILD_DIR)/salty
 
-build:
-	mkdir -p ./build
+$(BUILD_DIR)/salty: salty.c pawstd.h | $(BUILD_DIR)
+	$(CC) $(CFLAGS) -o $@ salty.c $(LDFLAGS)
+
+$(BUILD_DIR):
+	mkdir -p $(BUILD_DIR)
+
+clean:
+	rm -rf $(BUILD_DIR)
 
 install:
-	install -m 755 ./build/salty /usr/local/bin/salty
+	install -m 755 $(BUILD_DIR)/salty /usr/local/bin/salty
+
+uninstall:
+	rm $(PREFIX)/bin/salty

salty.c

@@ -2,12 +2,9 @@
 #include <stdlib.h>
 #include <string.h>
 #include <stdbool.h>
-#include <unistd.h>
-#include <limits.h>
-#include <sys/types.h>
 #include <sys/stat.h>
 #include <sodium.h>
-#include <pawstd.h>
+#include "pawstd.h"
 #define KEY_SIZE crypto_secretbox_KEYBYTES
 #define SALT_SIZE crypto_pwhash_SALTBYTES
 #define BUF_SIZE 1024
@@ -69,8 +66,6 @@ int encryptMessage(const char* inputFile, const char* outputFile, const char* pa
 			fclose(outFile);
 			return 1;
 		}
-		int i = 0;
-
         while(true) {
 			size_t readBytes = fread(buffer,1,BUF_SIZE,stdin);
 			decLen += readBytes;
@@ -99,7 +94,7 @@ int encryptMessage(const char* inputFile, const char* outputFile, const char* pa
 	} else {
 		// Open input file
 		FILE *inFile = fopen(inputFile,"rb");
-		if (inFile == NULL || outFile == NULL) {
+		if (inFile == NULL) {
 			fprintf(stderr,ERR"Could not open input file!\n");
 			return 1;
 		}
@@ -126,8 +121,8 @@ int encryptMessage(const char* inputFile, const char* outputFile, const char* pa
 	}
 
 	size_t encLen = decLen + crypto_secretbox_MACBYTES;
-	fprintf(stderr,OK"File is %d bytes.\n",decLen);
-	fprintf(stderr,OK"Encoding file to %d bytes.\n", encLen);
+	fprintf(stderr,OK"File is %zu bytes.\n",decLen);
+	fprintf(stderr,OK"Encoding file to %zu bytes.\n", encLen);
 	fprintf(stderr,NOR"Beginning encryption...\n");
 
 	// Generate a nonce, write headers and encrypted message
@@ -251,8 +246,8 @@ int decryptMessage(const char* inputFile, const char* outputFile, const char* pa
 		return 1;
 	}
 
-	fprintf(stderr,DBG"Size of encrypted file: %d bytes.\n",inLen);
-	fprintf(stderr,DBG"This means the encrypted content is %d bytes.\n",encLen);
+	fprintf(stderr,DBG"Size of encrypted file: %zu bytes.\n",inLen);
+	fprintf(stderr,DBG"This means the encrypted content is %zu bytes.\n",encLen);
 
 	unsigned char encrypted[encLen];
 
@@ -320,6 +315,38 @@ bool isFile(const char* filename) {
 	return (stat(filename, &buffer) == 0);
 }
 
+bool getPassword(char *pw, int size) {
+    int i = 0;
+    char c;
+    // Hide input
+    printf("\033[8m");
+    pw[0] = '\0';
+    // Get password from stdin
+    while (true) {
+        c = fgetc(stdin);
+        if (c == '\r' || c == '\n' || feof(stdin)) {
+            break;
+        }
+        // Return false on excess characters
+        if (i < size - 1) {
+            pw[i] = c;
+            pw[i + 1] = '\0';
+        } else
+            return false;
+        i++;
+    }
+    // Position cursor and print asterisks
+    printf ("\033[0A");
+    printf ("\033[32C");
+    while (i) {
+        printf ( "*");
+        i--;
+    }
+    // Show input
+    printf ("\033[28m");
+    return true;
+}
+
 int main(int argc, char *argv[]) {
 	fprintf(stderr,"- NetPaws Salty - File Encryption Program\n");
 	fprintf(stderr,"- 2024 Ignacio Rivero\n\n");
@@ -370,7 +397,7 @@ int main(int argc, char *argv[]) {
 				exit = 1;
 			} else if (pass == -1) {
 				if (strlen(argv[i+1]) > 128) {
-					fprintf(stderr,ERR"Password too long.");
+					fprintf(stderr,ERR"Password is too long.");
 					exit = 1;
 				} else {
 					pass = ++i;
@@ -394,7 +421,6 @@ int main(int argc, char *argv[]) {
 	// Set input and output filenames, or go to standard I/O if none
 	char input[FILENAME_MAX];
 	char output[FILENAME_MAX];
-	char psw[129];
 
 	if (in == -1) {
 		fprintf(stderr,NOR"No input file, reading from stdin.\n");
@@ -403,7 +429,7 @@ int main(int argc, char *argv[]) {
 		fprintf(stderr,NOR"Reading from stdin.\n");
 		stdinput = true;
 	} else {
-		snprintf(input,sizeof(input),argv[in]);
+		snprintf(input,sizeof(input),"%s", argv[in]);
 	}
 
 	if (out == -1) {
@@ -413,7 +439,7 @@ int main(int argc, char *argv[]) {
 		fprintf(stderr,NOR"Writing to stdout.\n");
 		snprintf(output,sizeof(output),"/dev/stdout");
 	} else {
-		snprintf(output,sizeof(output),argv[out]);
+		snprintf(output,sizeof(output),"%s", argv[out]);
 	}
 
 	char* password;
@@ -425,7 +451,12 @@ int main(int argc, char *argv[]) {
         fprintf(stderr, ERR"Cannot read from stdin without a password.\n");
         return 1;
     } else {
-		password = getpass("Enter your encryption password: ");
+        password = malloc(129);
+        fprintf(stderr,ERR"Enter your encryption password: ");
+        if (!getPassword(password,130)) {
+            fprintf(stderr,ERR"Password is too long.");
+            return 1;
+        }
     }
 
     if (decrypt) {