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noise: store clamped key instead of raw key 

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2019-02-03 21:50:54 +01:00
parent 1e58a0525e
commit 17281d9369
2 changed files with 2 additions and 4 deletions
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1
src/curve25519.c
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@ -68,7 +68,6 @@ static inline void put_unaligned_le64(u64 s, u8 *d)
#ifndef __force #ifndef __force
#define __force #define __force
#endif #endif
#define clamp_secret(a) curve25519_clamp_secret(a)
static noinline void memzero_explicit(void *s, size_t count) static noinline void memzero_explicit(void *s, size_t count)
{ {

5
src/curve25519.h
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@ -10,7 +10,7 @@
#include <sys/types.h> #include <sys/types.h>
enum curve25519_lengths { enum curve25519_lengths {
CURVE25519_KEY_SIZE = 32, 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(uint8_t mypublic[static CURVE25519_KEY_SIZE], const uint8_t secret[static CURVE25519_KEY_SIZE], const uint8_t basepoint[static CURVE25519_KEY_SIZE]);
@ -18,8 +18,7 @@ void curve25519_generate_public(uint8_t pub[static CURVE25519_KEY_SIZE], const u
static inline void curve25519_clamp_secret(uint8_t secret[static CURVE25519_KEY_SIZE]) static inline void curve25519_clamp_secret(uint8_t secret[static CURVE25519_KEY_SIZE])
{ {
secret[0] &= 248; secret[0] &= 248;
secret[31] &= 127; secret[31] = (secret[31] & 127) | 64;
secret[31] |= 64;
} }
#endif #endif