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Add a function to extract the secretkey from a keypair

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This commit is contained in:
Elichai Turkel 2020-11-05 16:48:48 +02:00
parent 9e5939d284
commit fc96aa73f5
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GPG Key ID: 9383CDE9E8E66A7F
2 changed files with 23 additions and 0 deletions
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13
include/secp256k1_extrakeys.h
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@ -165,6 +165,19 @@ SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_keypair_create(
const unsigned char *seckey const unsigned char *seckey
) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3); ) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3);
/** Get the secret key from a keypair.
*
* Returns: 0 if the arguments are invalid. 1 otherwise.
* Args: ctx: pointer to a context object (cannot be NULL)
* Out: seckey: pointer to a 32-byte buffer for the secret key (cannot be NULL)
* In: keypair: pointer to a keypair (cannot be NULL)
*/
SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_keypair_sec(
const secp256k1_context* ctx,
unsigned char *seckey,
const secp256k1_keypair *keypair
) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3);
/** Get the public key from a keypair. /** Get the public key from a keypair.
* *
* Returns: 0 if the arguments are invalid. 1 otherwise. * Returns: 0 if the arguments are invalid. 1 otherwise.

10
src/modules/extrakeys/main_impl.h
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@ -186,6 +186,16 @@ int secp256k1_keypair_create(const secp256k1_context* ctx, secp256k1_keypair *ke
return ret; return ret;
} }
int secp256k1_keypair_sec(const secp256k1_context* ctx, unsigned char *seckey, const secp256k1_keypair *keypair) {
VERIFY_CHECK(ctx != NULL);
ARG_CHECK(seckey != NULL);
memset(seckey, 0, 32);
ARG_CHECK(keypair != NULL);
memcpy(seckey, &keypair->data[0], 32);
return 1;
}
int secp256k1_keypair_pub(const secp256k1_context* ctx, secp256k1_pubkey *pubkey, const secp256k1_keypair *keypair) { int secp256k1_keypair_pub(const secp256k1_context* ctx, secp256k1_pubkey *pubkey, const secp256k1_keypair *keypair) {
VERIFY_CHECK(ctx != NULL); VERIFY_CHECK(ctx != NULL);
ARG_CHECK(pubkey != NULL); ARG_CHECK(pubkey != NULL);