| 1 | #ifndef _CRYPTO_GCM_H
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| 2 | #define _CRYPTO_GCM_H
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| 3 |
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| 4 | #include <linux/errno.h>
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| 5 |
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| 6 | #define GCM_AES_IV_SIZE 12
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| 7 | #define GCM_RFC4106_IV_SIZE 8
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| 8 | #define GCM_RFC4543_IV_SIZE 8
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| 9 |
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| 10 | |
| 11 | * validate authentication tag for GCM
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| 12 |
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| 13 | static inline int crypto_gcm_check_authsize(size_t authsize)
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| 14 | {
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| 15 | switch (authsize) {
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| 16 | case 4:
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| 17 | case 8:
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| 18 | case 12:
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| 19 | case 13:
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| 20 | case 14:
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| 21 | case 15:
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| 22 | case 16:
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| 23 | break;
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| 24 | default:
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| 25 | return -EINVAL;
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| 26 | }
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| 27 |
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| 28 | return 0;
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| 29 | }
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| 30 |
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| 31 | |
| 32 | * validate authentication tag for RFC4106
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| 33 |
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| 34 | static inline int crypto_rfc4106_check_authsize(size_t authsize)
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| 35 | {
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| 36 | switch (authsize) {
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| 37 | case 8:
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| 38 | case 12:
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| 39 | case 16:
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| 40 | break;
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| 41 | default:
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| 42 | return -EINVAL;
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| 43 | }
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| 44 |
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| 45 | return 0;
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| 46 | }
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| 47 |
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| 48 | |
| 49 | * validate assoclen for RFC4106/RFC4543
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| 50 |
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| 51 | static inline int crypto_ipsec_check_assoclen(unsigned int assoclen)
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| 52 | {
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| 53 | switch (assoclen) {
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| 54 | case 16:
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| 55 | case 20:
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| 56 | break;
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| 57 | default:
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| 58 | return -EINVAL;
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| 59 | }
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| 60 |
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| 61 | return 0;
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| 62 | }
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| 63 |
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| 64 | #endif
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