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b6943b9198
There's no good reason to support them, and this way every key is 33 bytes. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
#include "privkey.h"
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#include "pubkey.h"
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#include <assert.h>
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#include <ccan/mem/mem.h>
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#include <ccan/str/hex/hex.h>
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bool pubkey_from_der(secp256k1_context *secpctx,
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const u8 *der, size_t len,
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struct pubkey *key)
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{
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if (len != sizeof(key->der))
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return false;
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memcpy(key->der, memcheck(der, sizeof(key->der)), sizeof(key->der));
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if (!secp256k1_ec_pubkey_parse(secpctx, &key->pubkey, key->der,
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sizeof(key->der)))
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return false;
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return true;
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}
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/* Pubkey from privkey */
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bool pubkey_from_privkey(secp256k1_context *secpctx,
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const struct privkey *privkey,
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struct pubkey *key,
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unsigned int compressed_flags)
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{
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size_t outlen;
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if (!secp256k1_ec_pubkey_create(secpctx, &key->pubkey, privkey->secret))
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return false;
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if (!secp256k1_ec_pubkey_serialize(secpctx, key->der, &outlen,
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&key->pubkey, compressed_flags))
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return false;
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assert(outlen == sizeof(key->der));
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return true;
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}
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bool pubkey_from_hexstr(secp256k1_context *secpctx,
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const char *derstr, size_t slen, struct pubkey *key)
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{
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size_t dlen;
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unsigned char der[sizeof(key->der)];
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dlen = hex_data_size(slen);
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if (dlen != sizeof(der))
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return false;
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if (!hex_decode(derstr, slen, der, dlen))
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return false;
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return pubkey_from_der(secpctx, der, dlen, key);
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}
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bool pubkey_eq(const struct pubkey *a, const struct pubkey *b)
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{
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return memcmp(a->der, b->der, sizeof(a->der)) == 0;
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}
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