diff options
| -rw-r--r-- | drivers/staging/p9auth/p9auth.c | 133 |
1 files changed, 64 insertions, 69 deletions
diff --git a/drivers/staging/p9auth/p9auth.c b/drivers/staging/p9auth/p9auth.c index c1e5bc4f30a..a6078bb813c 100644 --- a/drivers/staging/p9auth/p9auth.c +++ b/drivers/staging/p9auth/p9auth.c @@ -61,13 +61,10 @@ struct cap_dev { struct cdev cdev; }; -char *cap_hash(char *plain_text, unsigned int plain_text_size, char *key, - unsigned int key_size); - -int cap_major = CAP_MAJOR; -int cap_minor; -int cap_nr_devs = CAP_NR_DEVS; -int cap_node_size = CAP_NODE_SIZE; +static int cap_major = CAP_MAJOR; +static int cap_minor; +static int cap_nr_devs = CAP_NR_DEVS; +static int cap_node_size = CAP_NODE_SIZE; module_param(cap_major, int, S_IRUGO); module_param(cap_minor, int, S_IRUGO); @@ -76,16 +73,65 @@ module_param(cap_nr_devs, int, S_IRUGO); MODULE_AUTHOR("Ashwin Ganti"); MODULE_LICENSE("GPL"); -struct cap_dev *cap_devices; +static struct cap_dev *cap_devices; -void hexdump(unsigned char *buf, unsigned int len) +static void hexdump(unsigned char *buf, unsigned int len) { while (len--) printk("%02x", *buf++); printk("\n"); } -int cap_trim(struct cap_dev *dev) +static char *cap_hash(char *plain_text, unsigned int plain_text_size, + char *key, unsigned int key_size) +{ + struct scatterlist sg; + char *result = kmalloc(MAX_DIGEST_SIZE, GFP_KERNEL); + struct crypto_hash *tfm; + struct hash_desc desc; + int ret; + + tfm = crypto_alloc_hash("hmac(sha1)", 0, CRYPTO_ALG_ASYNC); + if (IS_ERR(tfm)) { + printk(KERN_ERR + "failed to load transform for hmac(sha1): %ld\n", + PTR_ERR(tfm)); + kfree(result); + return NULL; + } + + desc.tfm = tfm; + desc.flags = 0; + + memset(result, 0, MAX_DIGEST_SIZE); + sg_set_buf(&sg, plain_text, plain_text_size); + + ret = crypto_hash_setkey(tfm, key, key_size); + if (ret) { + printk(KERN_ERR "setkey() failed ret=%d\n", ret); + kfree(result); + result = NULL; + goto out; + } + + ret = crypto_hash_digest(&desc, &sg, plain_text_size, result); + if (ret) { + printk(KERN_ERR "digest () failed ret=%d\n", ret); + kfree(result); + result = NULL; + goto out; + } + + printk(KERN_DEBUG "crypto hash digest size %d\n", + crypto_hash_digestsize(tfm)); + hexdump(result, MAX_DIGEST_SIZE); + +out: + crypto_free_hash(tfm); + return result; +} + +static int cap_trim(struct cap_dev *dev) { struct cap_node *tmp; struct list_head *pos, *q; @@ -99,7 +145,7 @@ int cap_trim(struct cap_dev *dev) return 0; } -int cap_open(struct inode *inode, struct file *filp) +static int cap_open(struct inode *inode, struct file *filp) { struct cap_dev *dev; dev = container_of(inode->i_cdev, struct cap_dev, cdev); @@ -120,13 +166,13 @@ int cap_open(struct inode *inode, struct file *filp) return 0; } -int cap_release(struct inode *inode, struct file *filp) +static int cap_release(struct inode *inode, struct file *filp) { return 0; } -ssize_t cap_write(struct file *filp, const char __user *buf, size_t count, - loff_t *f_pos) +static ssize_t cap_write(struct file *filp, const char __user *buf, + size_t count, loff_t *f_pos) { struct cap_node *node_ptr, *tmp; struct list_head *pos; @@ -181,8 +227,7 @@ ssize_t cap_write(struct file *filp, const char __user *buf, size_t count, printk(KERN_ALERT "the source user is %s \n", source_user); printk(KERN_ALERT "the target user is %s \n", target_user); - result = - cap_hash(hash_str, len, rand_str, strlen(rand_str)); + result = cap_hash(hash_str, len, rand_str, strlen(rand_str)); if (NULL == result) { retval = -EFAULT; goto out; @@ -266,15 +311,14 @@ out: return retval; } -const struct file_operations cap_fops = { +static const struct file_operations cap_fops = { .owner = THIS_MODULE, .write = cap_write, .open = cap_open, .release = cap_release, }; - -void cap_cleanup_module(void) +static void cap_cleanup_module(void) { int i; dev_t devno = MKDEV(cap_major, cap_minor); @@ -289,7 +333,6 @@ void cap_cleanup_module(void) } - static void cap_setup_cdev(struct cap_dev *dev, int index) { int err, devno = MKDEV(cap_major, cap_minor + index); @@ -301,8 +344,7 @@ static void cap_setup_cdev(struct cap_dev *dev, int index) printk(KERN_NOTICE "Error %d adding cap%d", err, index); } - -int cap_init_module(void) +static int cap_init_module(void) { int result, i; dev_t dev = 0; @@ -347,51 +389,4 @@ fail: module_init(cap_init_module); module_exit(cap_cleanup_module); -char *cap_hash(char *plain_text, unsigned int plain_text_size, - char *key, unsigned int key_size) -{ - struct scatterlist sg; - char *result = kmalloc(MAX_DIGEST_SIZE, GFP_KERNEL); - struct crypto_hash *tfm; - struct hash_desc desc; - int ret; - - tfm = crypto_alloc_hash("hmac(sha1)", 0, CRYPTO_ALG_ASYNC); - if (IS_ERR(tfm)) { - printk(KERN_ERR - "failed to load transform for hmac(sha1): %ld\n", - PTR_ERR(tfm)); - kfree(result); - return NULL; - } - - desc.tfm = tfm; - desc.flags = 0; - - memset(result, 0, MAX_DIGEST_SIZE); - sg_set_buf(&sg, plain_text, plain_text_size); - - ret = crypto_hash_setkey(tfm, key, key_size); - if (ret) { - printk(KERN_ERR "setkey() failed ret=%d\n", ret); - kfree(result); - result = NULL; - goto out; - } - - ret = crypto_hash_digest(&desc, &sg, plain_text_size, result); - if (ret) { - printk(KERN_ERR "digest () failed ret=%d\n", ret); - kfree(result); - result = NULL; - goto out; - } - - printk(KERN_DEBUG "crypto hash digest size %d\n", - crypto_hash_digestsize(tfm)); - hexdump(result, MAX_DIGEST_SIZE); -out: - crypto_free_hash(tfm); - return result; -} |