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sys/dev/if_wg/include/crypto/curve25519.h
- This file was added.
| #ifndef _CURVE25519_H_ | |||||
| #define _CURVE25519_H_ | |||||
| #include <sys/systm.h> | |||||
| #define CURVE25519_KEY_SIZE 32 | |||||
| void curve25519_generic(u8 [CURVE25519_KEY_SIZE], | |||||
| const u8 [CURVE25519_KEY_SIZE], | |||||
| const u8 [CURVE25519_KEY_SIZE]); | |||||
| static inline void curve25519_clamp_secret(u8 secret[CURVE25519_KEY_SIZE]) | |||||
| { | |||||
| secret[0] &= 248; | |||||
| secret[31] = (secret[31] & 127) | 64; | |||||
| } | |||||
| static const u8 null_point[CURVE25519_KEY_SIZE] = { 0 }; | |||||
| static inline int curve25519(u8 mypublic[CURVE25519_KEY_SIZE], | |||||
| const u8 secret[CURVE25519_KEY_SIZE], | |||||
| const u8 basepoint[CURVE25519_KEY_SIZE]) | |||||
| { | |||||
| curve25519_generic(mypublic, secret, basepoint); | |||||
| return timingsafe_bcmp(mypublic, null_point, CURVE25519_KEY_SIZE); | |||||
| } | |||||
| static inline int curve25519_generate_public(u8 pub[CURVE25519_KEY_SIZE], | |||||
| const u8 secret[CURVE25519_KEY_SIZE]) | |||||
| { | |||||
| static const u8 basepoint[CURVE25519_KEY_SIZE] __aligned(32) = { 9 }; | |||||
| if (timingsafe_bcmp(secret, null_point, CURVE25519_KEY_SIZE) == 0) | |||||
| return 0; | |||||
| return curve25519(pub, secret, basepoint); | |||||
| } | |||||
| static inline void curve25519_generate_secret(u8 secret[CURVE25519_KEY_SIZE]) | |||||
| { | |||||
| arc4random_buf(secret, CURVE25519_KEY_SIZE); | |||||
| curve25519_clamp_secret(secret); | |||||
| } | |||||
| #endif /* _CURVE25519_H_ */ | |||||