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#include "privkey.h"
#include "pubkey.h"
#include "utils.h"
#include <assert.h>
#include <ccan/mem/mem.h>
#include <ccan/str/hex/hex.h>
#include <ccan/structeq/structeq.h>
bool pubkey_from_der(secp256k1_context *secpctx,
const u8 *der, size_t len,
struct pubkey *key)
{
if (len != PUBKEY_DER_LEN)
return false;
if (!secp256k1_ec_pubkey_parse(secpctx, &key->pubkey,
memcheck(der, len), len))
return false;
return true;
}
void pubkey_to_der(secp256k1_context *secpctx, u8 der[PUBKEY_DER_LEN],
const struct pubkey *key)
{
size_t outlen = PUBKEY_DER_LEN;
if (!secp256k1_ec_pubkey_serialize(secpctx, der, &outlen,
&key->pubkey,
SECP256K1_EC_COMPRESSED))
abort();
assert(outlen == PUBKEY_DER_LEN);
}
/* Pubkey from privkey */
bool pubkey_from_privkey(secp256k1_context *secpctx,
const struct privkey *privkey,
struct pubkey *key)
{
if (!secp256k1_ec_pubkey_create(secpctx, &key->pubkey, privkey->secret))
return false;
return true;
}
bool pubkey_from_hexstr(secp256k1_context *secpctx,
const char *derstr, size_t slen, struct pubkey *key)
{
size_t dlen;
unsigned char der[PUBKEY_DER_LEN];
dlen = hex_data_size(slen);
if (dlen != sizeof(der))
return false;
if (!hex_decode(derstr, slen, der, dlen))
return false;
return pubkey_from_der(secpctx, der, dlen, key);
}
char *pubkey_to_hexstr(const tal_t *ctx, secp256k1_context *secpctx,
const struct pubkey *key)
{
unsigned char der[PUBKEY_DER_LEN];
pubkey_to_der(secpctx, der, key);
return tal_hexstr(ctx, der, sizeof(der));
}
bool pubkey_eq(const struct pubkey *a, const struct pubkey *b)
{
return structeq(&a->pubkey, &b->pubkey);
}