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crypto_module.c
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crypto_module.c
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/* -*- mode: C; fill-column: 80; c-file-style: "linux"; indent-tabs-mode: t -*- */
#include <linux/init.h>
#include <linux/module.h>
#include <linux/cdev.h>
#include <linux/crypto.h>
#include "crypto_structures.h"
#include "crypto_algorithm.h"
#include "crypto_proc.h"
#include "crypto_device.h"
MODULE_AUTHOR("Adam Michalik <adamm@mimuw.edu.pl>");
MODULE_LICENSE("Dual BSD/GPL");
static bool crypto_api_available(void)
{
return crypto_has_alg("ecb(des)", 0, 0);
}
static int crypto_init(void)
{
int err;
printk(KERN_NOTICE "Hello, crypto!\n");
if(!crypto_api_available()) {
printk(KERN_WARNING "Crypto API unavailable\n");
return -ENODEV;
}
if((err = create_cryptiface())) {
printk(KERN_WARNING "Couldn't create cryptiface device.\n");
goto create_cryptiface_fail;
}
if((err = create_crypto_proc_entries())) {
printk(KERN_WARNING "Couldn't create proc entries.\n");
goto create_proc_entries_fail;
}
return 0;
create_proc_entries_fail:
destroy_cryptiface();
create_cryptiface_fail:
return err;
}
static void crypto_exit(void)
{
remove_crypto_proc_entries();
destroy_cryptiface();
printk(KERN_NOTICE "Goodbye, crypto!\n");
}
module_init(crypto_init);
module_exit(crypto_exit);