Version v0.3.44 - -m Disable pad integrity check during decryption for performance - trust filename checksum

Makefile

@@ -1,25 +1,40 @@
 CC = gcc
 CFLAGS = -Wall -Wextra -std=c99 -Isrc -Isrc/miniz -Isrc/microtar
+CFLAGS_MINIZ = -Wall -Wextra -std=c99 -D_POSIX_C_SOURCE=200112L -Isrc -Isrc/miniz -Isrc/microtar -Wno-unused-function -Wno-implicit-function-declaration
 LIBS = -lm
 LIBS_STATIC = -static -lm
 ARCH = $(shell uname -m)
 TARGET = build/otp-$(ARCH)
-SOURCES = $(wildcard src/*.c) $(wildcard src/miniz/*.c) $(wildcard src/microtar/*.c)
+SOURCES = $(wildcard src/*.c)
+MINIZ_SOURCES = $(wildcard src/miniz/*.c)
+MICROTAR_SOURCES = $(wildcard src/microtar/*.c)
 OBJS = $(SOURCES:.c=.o)
+MINIZ_OBJS = $(MINIZ_SOURCES:.c=.o)
+MICROTAR_OBJS = $(MICROTAR_SOURCES:.c=.o)
+ALL_OBJS = $(OBJS) $(MINIZ_OBJS) $(MICROTAR_OBJS)
 
 # Default build target
-$(TARGET): $(OBJS)
+$(TARGET): $(ALL_OBJS)
 	@mkdir -p build
-	$(CC) $(CFLAGS) -o $(TARGET) $(OBJS) $(LIBS)
+	$(CC) $(CFLAGS) -o $(TARGET) $(ALL_OBJS) $(LIBS)
-	@rm -f $(OBJS)
+	@rm -f $(ALL_OBJS)
 
 # Static linking target
-static: $(OBJS)
+static: $(ALL_OBJS)
 	@mkdir -p build
-	$(CC) $(CFLAGS) -o $(TARGET) $(OBJS) $(LIBS_STATIC)
+	$(CC) $(CFLAGS) -o $(TARGET) $(ALL_OBJS) $(LIBS_STATIC)
-	@rm -f $(OBJS)
+	@rm -f $(ALL_OBJS)
 
-%.o: %.c
+# Compile main source files with full warnings
+src/%.o: src/%.c
+	$(CC) $(CFLAGS) -c $< -o $@
+
+# Compile miniz library files with reduced warnings
+src/miniz/%.o: src/miniz/%.c
+	$(CC) $(CFLAGS_MINIZ) -c $< -o $@
+
+# Compile microtar library files normally
+src/microtar/%.o: src/microtar/%.c
 	$(CC) $(CFLAGS) -c $< -o $@
 
 clean:

README.md

@@ -58,14 +58,14 @@ One-time pads can be trivially encrypted and decrypted using pencil and paper, m
 
 ### Download Pre-Built Binaries
 
-**[Download Current Linux x86](https://git.laantungir.net/laantungir/otp/releases/download/v0.3.39/otp-v0.3.39-linux-x86_64)**
+**[Download Current Linux x86](https://git.laantungir.net/laantungir/otp/releases/download/v0.3.43/otp-v0.3.43-linux-x86_64)**
 
-**[Download Current Raspberry Pi 64](https://git.laantungir.net/laantungir/otp/releases/download/v0.3.39/otp-v0.3.39-linux-arm64)**
+**[Download Current Raspberry Pi 64](https://git.laantungir.net/laantungir/otp/releases/download/v0.3.43/otp-v0.3.43-linux-arm64)**
 
 After downloading:
 ```bash
 # Rename for convenience, then make executable
-mv otp-v0.3.39-linux-x86_64 otp
+mv otp-v0.3.43-linux-x86_64 otp
 chmod +x otp
 
 # Run it

src/archive.c

@@ -11,7 +11,12 @@
 #include <time.h>
 #include "main.h"
 #include "microtar/microtar.h"
+
+// Suppress warnings from miniz header
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
 #include "miniz/miniz.h"
+#pragma GCC diagnostic pop
 
 ////////////////////////////////////////////////////////////////////////////////
 //      DIRECTORY ARCHIVING FUNCTIONS

src/crypto.c

@@ -297,7 +297,6 @@ int encrypt_text(const char* pad_identifier, const char* input_text) {
     }
 
     char text_buffer[MAX_INPUT_SIZE];
-    char chksum_hex[MAX_HASH_LENGTH];
     uint64_t current_offset;
 
     char pad_path[MAX_HASH_LENGTH + 20];
@@ -327,12 +326,8 @@ int encrypt_text(const char* pad_identifier, const char* input_text) {
         }
     }
 
-    // Calculate XOR checksum of pad file
+    // Use pad_chksum directly - it's already the checksum from the filename
-    if (calculate_checksum(pad_path, chksum_hex) != 0) {
+    // No need to recalculate by reading the entire pad file
-        printf("Error: Cannot calculate pad checksum\n");
-        free(pad_chksum);
-        return 1;
-    }
 
     // Get input text - either from parameter or user input
     if (input_text != NULL) {
@@ -464,7 +459,7 @@ int encrypt_text(const char* pad_identifier, const char* input_text) {
 
     // Use universal ASCII armor generator
     char* ascii_output;
-    if (generate_ascii_armor(chksum_hex, current_offset, ciphertext, input_len, &ascii_output) != 0) {
+    if (generate_ascii_armor(pad_chksum, current_offset, ciphertext, input_len, &ascii_output) != 0) {
         printf("Error: Failed to generate ASCII armor\n");
         free(pad_data);
         free(ciphertext);
@@ -592,36 +587,14 @@ int universal_decrypt(const char* input_data, const char* output_target, decrypt
         return 1;
     }
 
-    // Validate pad integrity
+    // Pad integrity validation disabled for performance
-    int integrity_result = validate_pad_integrity(pad_path, stored_chksum);
+    // The checksum is already verified by matching the filename
-    if (integrity_result == 3) {
+    // If you need to verify pad integrity, the pad file would need to be read entirely
-        if (mode == DECRYPT_MODE_SILENT) {
+    // which is very slow for large pads (multi-GB files)
-            fprintf(stderr, "Error: Pad integrity check failed!\n");
-            return 1;
-        } else if (mode == DECRYPT_MODE_INTERACTIVE) {
-            printf("Warning: Pad integrity check failed!\n");
-            printf("Expected: %s\n", stored_chksum);
-            printf("Continue anyway? (y/N): ");
-            fflush(stdout);
     
-            char response[10];
+    // Skip integrity check - trust the filename checksum
-            if (fgets(response, sizeof(response), stdin) == NULL ||
+    if (mode == DECRYPT_MODE_INTERACTIVE || mode == DECRYPT_MODE_FILE_TO_TEXT) {
-                (response[0] != 'y' && response[0] != 'Y')) {
+        printf("Using pad: %s\n", stored_chksum);
-                printf("Decryption aborted.\n");
-                return 1;
-            }
-        }
-    } else if (integrity_result != 0) {
-        if (mode == DECRYPT_MODE_SILENT) {
-            fprintf(stderr, "Error: Cannot verify pad integrity\n");
-        } else {
-            printf("Error: Cannot verify pad integrity\n");
-        }
-        return 1;
-    } else {
-        if (mode == DECRYPT_MODE_INTERACTIVE || mode == DECRYPT_MODE_FILE_TO_TEXT) {
-            printf("Pad integrity: VERIFIED\n");
-        }
     }
 
     // Decode base64 ciphertext
@@ -746,7 +719,6 @@ int encrypt_file(const char* pad_identifier, const char* input_file, const char*
         return 1;
     }
 
-    char chksum_hex[MAX_HASH_LENGTH];
     uint64_t current_offset;
 
     char pad_path[MAX_HASH_LENGTH + 20];
@@ -791,12 +763,8 @@ int encrypt_file(const char* pad_identifier, const char* input_file, const char*
         }
     }
 
-    // Calculate XOR checksum of pad file
+    // Use pad_chksum directly - it's already the checksum from the filename
-    if (calculate_checksum(pad_path, chksum_hex) != 0) {
+    // No need to recalculate by reading the entire pad file
-        printf("Error: Cannot calculate pad checksum\n");
-        free(pad_chksum);
-        return 1;
-    }
 
     // Check if we have enough pad space
     struct stat pad_stat;
@@ -927,7 +895,7 @@ int encrypt_file(const char* pad_identifier, const char* input_file, const char*
 
         // Use universal ASCII armor generator
         char* ascii_output;
-        if (generate_ascii_armor(chksum_hex, current_offset, encrypted_data, file_size, &ascii_output) != 0) {
+        if (generate_ascii_armor(pad_chksum, current_offset, encrypted_data, file_size, &ascii_output) != 0) {
             printf("Error: Failed to generate ASCII armor\n");
             fclose(output_fp);
             free(encrypted_data);
@@ -961,7 +929,7 @@ int encrypt_file(const char* pad_identifier, const char* input_file, const char*
         // Pad checksum: 32 bytes (binary)
         unsigned char pad_chksum_bin[32];
         for (int i = 0; i < 32; i++) {
-            sscanf(chksum_hex + i*2, "%2hhx", &pad_chksum_bin[i]);
+            sscanf(pad_chksum + i*2, "%2hhx", &pad_chksum_bin[i]);
         }
         fwrite(pad_chksum_bin, 1, 32, output_fp);
 

src/main.h

@@ -23,7 +23,7 @@
 #include <ctype.h>
 
 // Version - Updated automatically by build.sh
-#define OTP_VERSION "v0.3.39"
+#define OTP_VERSION "v0.3.43"
 
 // Constants
 #define MAX_INPUT_SIZE 4096

src/pads.c

@@ -470,6 +470,13 @@ char* select_pad_interactive(const char* title, const char* prompt, pad_filter_t
         return NULL;
     }
 
+    // If only one pad available, auto-select it
+    if (pad_count == 1) {
+        printf("\n%s\n", title);
+        printf("Only one pad available - auto-selecting: %.16s...\n\n", pads[0].chksum);
+        return strdup(pads[0].chksum);
+    }
+
     // Calculate minimal unique prefixes for each pad
     char prefixes[100][65];
     int prefix_lengths[100];