1 #ifndef _CRYPTO_GCM_H 1 #ifndef _CRYPTO_GCM_H
2 #define _CRYPTO_GCM_H 2 #define _CRYPTO_GCM_H
3 3
4 #include <linux/errno.h> 4 #include <linux/errno.h>
5 5
6 #include <crypto/aes.h> <<
7 #include <crypto/gf128mul.h> <<
8 <<
9 #define GCM_AES_IV_SIZE 12 6 #define GCM_AES_IV_SIZE 12
10 #define GCM_RFC4106_IV_SIZE 8 7 #define GCM_RFC4106_IV_SIZE 8
11 #define GCM_RFC4543_IV_SIZE 8 8 #define GCM_RFC4543_IV_SIZE 8
12 9
13 /* 10 /*
14 * validate authentication tag for GCM 11 * validate authentication tag for GCM
15 */ 12 */
16 static inline int crypto_gcm_check_authsize(un 13 static inline int crypto_gcm_check_authsize(unsigned int authsize)
17 { 14 {
18 switch (authsize) { 15 switch (authsize) {
19 case 4: 16 case 4:
20 case 8: 17 case 8:
21 case 12: 18 case 12:
22 case 13: 19 case 13:
23 case 14: 20 case 14:
24 case 15: 21 case 15:
25 case 16: 22 case 16:
26 break; 23 break;
27 default: 24 default:
28 return -EINVAL; 25 return -EINVAL;
29 } 26 }
30 27
31 return 0; 28 return 0;
32 } 29 }
33 30
34 /* 31 /*
35 * validate authentication tag for RFC4106 32 * validate authentication tag for RFC4106
36 */ 33 */
37 static inline int crypto_rfc4106_check_authsiz 34 static inline int crypto_rfc4106_check_authsize(unsigned int authsize)
38 { 35 {
39 switch (authsize) { 36 switch (authsize) {
40 case 8: 37 case 8:
41 case 12: 38 case 12:
42 case 16: 39 case 16:
43 break; 40 break;
44 default: 41 default:
45 return -EINVAL; 42 return -EINVAL;
46 } 43 }
47 44
48 return 0; 45 return 0;
49 } 46 }
50 47
51 /* 48 /*
52 * validate assoclen for RFC4106/RFC4543 49 * validate assoclen for RFC4106/RFC4543
53 */ 50 */
54 static inline int crypto_ipsec_check_assoclen( 51 static inline int crypto_ipsec_check_assoclen(unsigned int assoclen)
55 { 52 {
56 switch (assoclen) { 53 switch (assoclen) {
57 case 16: 54 case 16:
58 case 20: 55 case 20:
59 break; 56 break;
60 default: 57 default:
61 return -EINVAL; 58 return -EINVAL;
62 } 59 }
63 60
64 return 0; 61 return 0;
65 } 62 }
66 <<
67 struct aesgcm_ctx { <<
68 be128 ghash_key; <<
69 struct crypto_aes_ctx aes_ctx; <<
70 unsigned int authsize; <<
71 }; <<
72 <<
73 int aesgcm_expandkey(struct aesgcm_ctx *ctx, c <<
74 unsigned int keysize, uns <<
75 <<
76 void aesgcm_encrypt(const struct aesgcm_ctx *c <<
77 int crypt_len, const u8 *a <<
78 const u8 iv[GCM_AES_IV_SIZ <<
79 <<
80 bool __must_check aesgcm_decrypt(const struct <<
81 const u8 *src <<
82 int assoc_len <<
83 const u8 *aut <<
84 <<
85 #endif 63 #endif
86 64
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