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Changed back to add_hwgenerator_randomness

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This commit is contained in:
Mickey Malone
2021-02-13 09:40:03 -06:00
parent edc12a7988
commit e1fa69d49e
1 changed files with 5 additions and 7 deletions
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12
driver/pico_rng.c
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@@ -24,7 +24,6 @@ MODULE_VERSION("1.0");
**/ **/
#define VENDOR_ID 0x0 #define VENDOR_ID 0x0
#define PRODUCT_ID 0x4 #define PRODUCT_ID 0x4
#define PICO_RNG_ENTROPY(x) (((x) * 8 * 10) >> 5) /* quality: 10/32 */
/** /**
* Logger macros * Logger macros
@@ -125,7 +124,7 @@ static int pico_rng_read_data()
int actual_length = 0; int actual_length = 0;
// int usb_bulk_msg(struct usb_device *usb_dev, unsigned int pipe, void *data, int len, int *actual_length, int timeout) // int usb_bulk_msg(struct usb_device *usb_dev, unsigned int pipe, void *data, int len, int *actual_length, int timeout)
LOGGER_DEBUG("Calling usb_bulk_msg dev %p, pipe %d, buffer %p, size %d, and timeout %d", \ LOGGER_DEBUG("Calling usb_bulk_msg dev %p, pipe %u, buffer %p, size %d, and timeout %d", \
module_data.dev, module_data.pipe, module_data.buffer, module_data.endpoint->wMaxPacketSize, timeout); module_data.dev, module_data.pipe, module_data.buffer, module_data.endpoint->wMaxPacketSize, timeout);
retval = usb_bulk_msg(module_data.dev, retval = usb_bulk_msg(module_data.dev,
@@ -176,7 +175,7 @@ static int pico_rng_usb_probe(struct usb_interface *interface, const struct usb_
{ {
int retval = -ENODEV; int retval = -ENODEV;
module_data.dev = interface_to_usbdev(interface); module_data.dev = interface_to_usbdev(interface);
if(!module_data.dev) if(!module_data.dev)
{ {
LOGGER_ERR("Unable to locate usb device"); LOGGER_ERR("Unable to locate usb device");
@@ -216,9 +215,6 @@ static int pico_rng_usb_probe(struct usb_interface *interface, const struct usb_
return -1; return -1;
} }
// int usb_bulk_msg(struct usb_device *usb_dev, unsigned int pipe, void *data, int len, int *actual_length, int timeout)
//retval = usb_bulk_msg(dev, pipe, buffer, 64, &actual_length, 500);
pico_rng_kthread_start(); pico_rng_kthread_start();
return retval; return retval;
@@ -261,7 +257,9 @@ static int pico_rng_kthread(void *data)
} }
LOGGER_DEBUG("Adding hardware randomness\n"); LOGGER_DEBUG("Adding hardware randomness\n");
add_hwgenerator_randomness(module_data.buffer, bytes_read, PICO_RNG_ENTROPY(bytes_read)); // I would not exactly call this rng as trusted, so it will not add entropy, only random bits to the pool
// A trusted device would call add_hwgenerator_randomness and credit the entropy pool. For now the credit is 0 while still adding random bits.
add_hwgenerator_randomness(module_data.buffer, bytes_read, 0);
LOGGER_DEBUG("Randomness added\n"); LOGGER_DEBUG("Randomness added\n");
} }