[mirror_ubuntu-focal-kernel.git] / include / crypto / gcm.h

#ifndef _CRYPTO_GCM_H
#define _CRYPTO_GCM_H

#include <linux/errno.h>

#define GCM_AES_IV_SIZE 12
#define GCM_RFC4106_IV_SIZE 8
#define GCM_RFC4543_IV_SIZE 8

/*
 * validate authentication tag for GCM
 */
static inline int crypto_gcm_check_authsize(unsigned int authsize)
{
	switch (authsize) {
	case 4:
	case 8:
	case 12:
	case 13:
	case 14:
	case 15:
	case 16:
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

/*
 * validate authentication tag for RFC4106
 */
static inline int crypto_rfc4106_check_authsize(unsigned int authsize)
{
	switch (authsize) {
	case 8:
	case 12:
	case 16:
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

/*
 * validate assoclen for RFC4106/RFC4543
 */
static inline int crypto_ipsec_check_assoclen(unsigned int assoclen)
{
	switch (assoclen) {
	case 16:
	case 20:
		break;
	default:
		return -EINVAL;
	}

	return 0;
}
#endif
Commit	Line	Data
ef780324 CL	1	#ifndef _CRYPTO_GCM_H
	2	#define _CRYPTO_GCM_H
	3
65526f63 IP	4	#include <linux/errno.h>
65526f63 IP	5
ef780324 CL	6	#define GCM_AES_IV_SIZE 12
	7	#define GCM_RFC4106_IV_SIZE 8
	8	#define GCM_RFC4543_IV_SIZE 8
	9
65526f63 IP	10	/*
	11	* validate authentication tag for GCM
	12	*/
	13	static inline int crypto_gcm_check_authsize(unsigned int authsize)
	14	{
	15	switch (authsize) {
	16	case 4:
	17	case 8:
	18	case 12:
	19	case 13:
	20	case 14:
	21	case 15:
	22	case 16:
	23	break;
	24	default:
	25	return -EINVAL;
	26	}
	27
	28	return 0;
	29	}
	30
	31	/*
	32	* validate authentication tag for RFC4106
	33	*/
	34	static inline int crypto_rfc4106_check_authsize(unsigned int authsize)
	35	{
	36	switch (authsize) {
	37	case 8:
	38	case 12:
	39	case 16:
	40	break;
	41	default:
	42	return -EINVAL;
	43	}
	44
	45	return 0;
	46	}
	47
	48	/*
	49	* validate assoclen for RFC4106/RFC4543
	50	*/
	51	static inline int crypto_ipsec_check_assoclen(unsigned int assoclen)
	52	{
	53	switch (assoclen) {
	54	case 16:
	55	case 20:
	56	break;
	57	default:
	58	return -EINVAL;
	59	}
	60
	61	return 0;
	62	}
ef780324	63	#endif