def verify_recover_secp256k1_bc_native(signature,
req,
hasher=coincurve.utils.sha256,
context=GLOBAL_CONTEXT):
# Compact
native_rec_sig = ffi.new("secp256k1_ecdsa_recoverable_signature *")
raw_sig, recovery_id = signature[:64], coincurve.utils.bytes_to_int(
signature[64:])
lib.secp256k1_ecdsa_recoverable_signature_parse_compact(
context.ctx, native_rec_sig, raw_sig, recovery_id)
# Recover public key
native_public_key = ffi.new("secp256k1_pubkey *")
msg_hash = hasher(req) if hasher is not None else req
lib.secp256k1_ecdsa_recover(context.ctx, native_public_key, native_rec_sig,
msg_hash)
# Convert
native_standard_sig = ffi.new("secp256k1_ecdsa_signature *")
lib.secp256k1_ecdsa_recoverable_signature_convert(context.ctx,
native_standard_sig,
native_rec_sig)
# Verify
ret = lib.secp256k1_ecdsa_verify(context.ctx, native_standard_sig,
msg_hash, native_public_key)
def verify_recover_secp256k1_bc(signature,
req,
hasher=coincurve.utils.sha256,
context=GLOBAL_CONTEXT):
msg_hash = hasher(req) if hasher is not None else req
rec_sig = coincurve.ecdsa.deserialize_recoverable(signature)
public_key = coincurve.PublicKey(coincurve.ecdsa.recover(req, rec_sig))
n_sig = coincurve.ecdsa.recoverable_convert(rec_sig)
if not lib.secp256k1_ecdsa_verify(context.ctx, n_sig, msg_hash,
public_key.public_key):
raise RuntimeError("Failed to verify SECP256K1 bitcoin signature")
