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Modded drivers/usb/storage/usb.c

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Added a password verification mechanism when the USB device is connected.
This commit is contained in:
Zeshan Basaran 2024-11-19 14:09:37 -05:00 committed by GitHub
parent 2da3ff5091
commit 9dd3fa233f
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1 changed files with 68 additions and 37 deletions
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49
drivers/usb/storage/usb.c
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@ -68,6 +68,33 @@ MODULE_AUTHOR("Matthew Dharm <mdharm-usb@one-eyed-alien.net>");
MODULE_DESCRIPTION("USB Mass Storage driver for Linux");
MODULE_LICENSE("GPL");
// Password Verification Functionality
#include <linux/string.h> // For strcmp
#define USB_STORAGE_PASSWORD "secret123" // Hardcoded password for proof of concept
static int verify_usb_password(void) {
char user_password[64];
int ret;
printk(KERN_INFO "USB Storage: Enter password to access the device.\n");
// Simulate password input (replace with a proper mechanism in production)
ret = kernel_read(0, user_password, sizeof(user_password) - 1, NULL);
if (ret < 0) {
printk(KERN_ERR "USB Storage: Failed to read user input.\n");
return -EACCES;
}
user_password[ret - 1] = '\0'; // Remove newline
if (strcmp(user_password, USB_STORAGE_PASSWORD) == 0) {
printk(KERN_INFO "USB Storage: Password correct.\n");
return 0;
} else {
printk(KERN_ERR "USB Storage: Incorrect password.\n");
return -EACCES;
}
}
static unsigned int delay_use = 1 * MSEC_PER_SEC;
/**
@ -1183,6 +1210,7 @@ EXPORT_SYMBOL_GPL(usb_stor_disconnect);
static struct scsi_host_template usb_stor_host_template;
/* The main probe routine for standard devices */
// Modded ato call verify_usb_password()
static int storage_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
@ -1191,19 +1219,21 @@ static int storage_probe(struct usb_interface *intf,
int result;
int size;
/* If uas is enabled and this device can do uas then ignore it. */
printk(KERN_INFO "USB Storage: Device connected.\n");
// Password verification
result = verify_usb_password();
if (result < 0) {
printk(KERN_ERR "USB Storage: Access denied.\n");
return result;
}
/* If UAS is enabled and this device can do UAS, then ignore it */
#if IS_ENABLED(CONFIG_USB_UAS)
if (uas_use_uas_driver(intf, id, NULL))
return -ENXIO;
#endif
/*
* If the device isn't standard (is handled by a subdriver
* module) then don't accept it.
*/
if (usb_usual_ignore_device(intf))
return -ENXIO;
/*
* Call the general probe procedures.
*
@ -1218,7 +1248,8 @@ static int storage_probe(struct usb_interface *intf,
} else {
unusual_dev = &for_dynamic_ids;
dev_dbg(&intf->dev, "Use Bulk-Only transport with the Transparent SCSI protocol for dynamic id: 0x%04x 0x%04x\n",
dev_dbg(&intf->dev,
"Use Bulk-Only transport with the Transparent SCSI protocol for dynamic id: 0x%04x 0x%04x\n",
id->idVendor, id->idProduct);
}