diff options
Diffstat (limited to 'src/crypto/curve25519.h')
-rw-r--r-- | src/crypto/curve25519.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/crypto/curve25519.h b/src/crypto/curve25519.h new file mode 100644 index 0000000..b05432f --- /dev/null +++ b/src/crypto/curve25519.h @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0 OR MIT */ +/* + * Copyright (C) 2015-2020 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. + */ + +#ifndef CURVE25519_H +#define CURVE25519_H + +#include <stdint.h> +#include <sys/types.h> + +enum curve25519_lengths { + CURVE25519_KEY_SIZE = 32 +}; + +void curve25519(uint8_t mypublic[static CURVE25519_KEY_SIZE], const uint8_t secret[static CURVE25519_KEY_SIZE], const uint8_t basepoint[static CURVE25519_KEY_SIZE]); +void curve25519_generate_public(uint8_t pub[static CURVE25519_KEY_SIZE], const uint8_t secret[static CURVE25519_KEY_SIZE]); +static inline void curve25519_clamp_secret(uint8_t secret[static CURVE25519_KEY_SIZE]) +{ + secret[0] &= 248; + secret[31] = (secret[31] & 127) | 64; +} + +#endif |