| Corentin LABBE | ef78032 | 2017-08-22 10:08:08 +0200 | [diff] [blame] | 1 | #ifndef _CRYPTO_GCM_H |
| 2 | #define _CRYPTO_GCM_H |
| 3 | |
| Iuliana Prodan | 65526f6 | 2019-07-31 16:05:54 +0300 | [diff] [blame] | 4 | #include <linux/errno.h> |
| 5 | |
| Corentin LABBE | ef78032 | 2017-08-22 10:08:08 +0200 | [diff] [blame] | 6 | #define GCM_AES_IV_SIZE 12 |
| 7 | #define GCM_RFC4106_IV_SIZE 8 |
| 8 | #define GCM_RFC4543_IV_SIZE 8 |
| 9 | |
| Iuliana Prodan | 65526f6 | 2019-07-31 16:05:54 +0300 | [diff] [blame] | 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 | } |
| Corentin LABBE | ef78032 | 2017-08-22 10:08:08 +0200 | [diff] [blame] | 63 | #endif |