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TOMOYO Linux Cross Reference
Linux/include/crypto/gcm.h

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  1 #ifndef _CRYPTO_GCM_H
  2 #define _CRYPTO_GCM_H
  3 
  4 #include <linux/errno.h>
  5 
  6 #define GCM_AES_IV_SIZE 12
  7 #define GCM_RFC4106_IV_SIZE 8
  8 #define GCM_RFC4543_IV_SIZE 8
  9 
 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 }
 63 #endif
 64 

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