ecryptfs: remove private bin2hex implementation

#define DECRYPT		0

#define ENCRYPT		1

/**

 * ecryptfs_to_hex

 * @dst: Buffer to take hex character representation of contents of

 *       src; must be at least of size (src_size * 2)

 * @src: Buffer to be converted to a hex string representation

 * @src_size: number of bytes to convert

 */

void ecryptfs_to_hex(char *dst, char *src, size_t src_size)

{

	int x;

	for (x = 0; x < src_size; x++)

		sprintf(&dst[x * 2], "%.2x", (unsigned char)src[x]);

}

/**

 * ecryptfs_from_hex

 * @dst: Buffer to take the bytes from src hex; must be at least of

#include <crypto/skcipher.h>

#include <keys/user-type.h>

#include <keys/encrypted-type.h>

#include <linux/kernel.h>

#include <linux/fs.h>

#include <linux/fs_stack.h>

#include <linux/namei.h>

#define ECRYPTFS_XATTR_NAME "user.ecryptfs"

void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok);

extern void ecryptfs_to_hex(char *dst, char *src, size_t src_size);

static inline void

ecryptfs_to_hex(char *dst, char *src, size_t src_size)

{

	char *end = bin2hex(dst, src, src_size);

	*end = '\0';

}

extern void ecryptfs_from_hex(char *dst, char *src, int dst_size);

struct ecryptfs_key_record {