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Merge pull request #6 from tarcieri/crypto_sign_keypair

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Add crypto_sign_publickey() API
This commit is contained in:
Frank Denis 2013-01-26 13:27:58 -08:00
commit 02156fac27
3 changed files with 22 additions and 7 deletions
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1
src/libsodium/crypto_sign/ed25519/ref/crypto_sign.h
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@ -6,6 +6,7 @@
#define crypto_sign crypto_sign_ed25519
#define crypto_sign_open crypto_sign_ed25519_open
#define crypto_sign_keypair crypto_sign_ed25519_keypair
#define crypto_sign_publickey crypto_sign_ed25519_publickey
#define crypto_sign_BYTES crypto_sign_ed25519_BYTES
#define crypto_sign_PUBLICKEYBYTES crypto_sign_ed25519_PUBLICKEYBYTES
#define crypto_sign_SECRETKEYBYTES crypto_sign_ed25519_SECRETKEYBYTES

26
src/libsodium/crypto_sign/ed25519/ref/ed25519_ed25519.c
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@ -24,24 +24,36 @@ int crypto_sign_keypair(
unsigned char *pk,
unsigned char *sk
)
{
unsigned char seed[32];
randombytes(seed, 32);
crypto_sign_publickey(pk, sk, seed);
}
int crypto_sign_publickey(
unsigned char *pk,
unsigned char *sk,
unsigned char *seed
)
{
sc25519 scsk;
ge25519 gepk;
unsigned char extsk[64];
int i;
randombytes(sk, 32);
crypto_hash_sha512(extsk, sk, 32);
extsk[0] &= 248;
extsk[31] &= 127;
extsk[31] |= 64;
crypto_hash_sha512(sk, seed, 32);
sk[0] &= 248;
sk[31] &= 127;
sk[31] |= 64;
sc25519_from32bytes(&scsk,extsk);
sc25519_from32bytes(&scsk,sk);
ge25519_scalarmult_base(&gepk, &scsk);
ge25519_pack(pk, &gepk);
for(i=0;i<32;i++)
sk[32 + i] = pk[i];
for(i=0;i<32;i++)
sk[i] = seed[i];
return 0;
}

2
src/libsodium/include/sodium/crypto_sign_ed25519.h
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@ -12,6 +12,7 @@ extern "C" {
extern int crypto_sign_ed25519_ref(unsigned char *,unsigned long long *,const unsigned char *,unsigned long long,const unsigned char *);
extern int crypto_sign_ed25519_ref_open(unsigned char *,unsigned long long *,const unsigned char *,unsigned long long,const unsigned char *);
extern int crypto_sign_ed25519_ref_keypair(unsigned char *,unsigned char *);
extern int crypto_sign_ed25519_ref_publickey(unsigned char *,unsigned char *,unsigned char *);
#ifdef __cplusplus
}
#endif
@ -19,6 +20,7 @@ extern int crypto_sign_ed25519_ref_keypair(unsigned char *,unsigned char *);
#define crypto_sign_ed25519 crypto_sign_ed25519_ref
#define crypto_sign_ed25519_open crypto_sign_ed25519_ref_open
#define crypto_sign_ed25519_keypair crypto_sign_ed25519_ref_keypair
#define crypto_sign_ed25519_publickey crypto_sign_ed25519_ref_publickey
#define crypto_sign_ed25519_BYTES crypto_sign_ed25519_ref_BYTES
#define crypto_sign_ed25519_PUBLICKEYBYTES crypto_sign_ed25519_ref_PUBLICKEYBYTES
#define crypto_sign_ed25519_SECRETKEYBYTES crypto_sign_ed25519_ref_SECRETKEYBYTES