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onion_key: allowing both odd and even pubkeys 

output compressed public keys; accept compressed pubkey in test_onion
This commit is contained in:
Anthony Towns 2015-10-06 23:49:52 +10:00
parent 2042e1cdb7
commit 9ffac49c6f
3 changed files with 14 additions and 5 deletions
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10
test/onion_key.c
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@ -20,6 +20,7 @@ static void random_bytes(void *dst, size_t n)
d[i] = random() % 256;
}
#if 0
/* Compressed key would start with 0x3? Subtract from group. Thanks
* Greg Maxwell. */
static void flip_key(struct seckey *seckey)
@ -47,6 +48,7 @@ static void flip_key(struct seckey *seckey)
seckey->u.be64[i] = cpu_to_be64(v);
}
}
#endif
#if 0
int main(int argc, char *argv[])
@ -97,7 +99,7 @@ static void random_key(secp256k1_context *ctx,
/* We don't want to spend a byte encoding sign, so make sure it's 0x2 */
static void gen_keys(secp256k1_context *ctx,
struct seckey *seckey, struct onion_pubkey *pubkey)
struct seckey *seckey, struct compressed_pubkey *pubkey)
{
unsigned char tmp[33];
secp256k1_pubkey pkey;
@ -108,16 +110,18 @@ static void gen_keys(secp256k1_context *ctx,
secp256k1_ec_pubkey_serialize(ctx, tmp, &len, &pkey,
SECP256K1_EC_COMPRESSED);
assert(len == sizeof(tmp));
#if 0
if (tmp[0] == 0x3)
flip_key(seckey);
memcpy(pubkey, tmp+1, sizeof(*pubkey));
#endif
memcpy(pubkey, tmp, sizeof(*pubkey));
}
void print_keypair(int pub, int priv)
{
secp256k1_context *ctx;
struct seckey seckey;
struct onion_pubkey pubkey;
struct compressed_pubkey pubkey;
char sechex[hex_str_size(sizeof(seckey))];
char pubhex[hex_str_size(sizeof(pubkey))];

5
test/onion_key.h
View File

@ -11,6 +11,11 @@ struct seckey {
} u;
};
/* First byte is 0x02 or 0x03 indicating even or odd y */
struct compressed_pubkey {
unsigned char u8[33];
};
/* Prepend 0x02 to get pubkey for libsecp256k1 */
struct onion_pubkey {
unsigned char u8[32];

4
test/test_onion.c
View File

@ -588,9 +588,9 @@ bool peel_onion(struct onion *onion,
static bool parse_onion_pubkey(secp256k1_context *ctx,
const char *arg, secp256k1_pubkey *pubkey)
{
unsigned char tmp[33] = { 0x2 };
unsigned char tmp[33] = { };
if (!hex_decode(arg, strlen(arg), tmp + 1, sizeof(tmp) - 1))
if (!hex_decode(arg, strlen(arg), tmp, sizeof(tmp)))
return false;
return secp256k1_ec_pubkey_parse(ctx, pubkey, tmp, sizeof(tmp));