def crypto_sign_ed25519ph_final_create(edph, sk):
"""
Create a signature for the data hashed in edph
using the secret key sk
:param edph: the ed25519ph state for the data
being signed
:type edph: crypto_sign_ed25519ph_state
:param sk: the ed25519 secret part of the signing key
:type sk: bytes
:return: ed25519ph signature
:rtype: bytes
"""
ensure(isinstance(edph, crypto_sign_ed25519ph_state),
'edph parameter must be a ed25519ph_state object',
raising=exc.TypeError)
ensure(isinstance(sk, bytes),
'secret key parameter must be a bytes object',
raising=exc.TypeError)
ensure(len(sk) == crypto_sign_SECRETKEYBYTES,
('secret key must be {0} '
'bytes long').format(crypto_sign_SECRETKEYBYTES),
raising=exc.TypeError)
signature = ffi.new("unsigned char[]", crypto_sign_BYTES)
rc = lib.crypto_sign_ed25519ph_final_create(edph.state, signature,
ffi.NULL, sk)
ensure(rc == 0, 'Unexpected library error', raising=exc.RuntimeError)
return ffi.buffer(signature, crypto_sign_BYTES)[:]
def crypto_sign_ed25519ph_final_create(edph,
sk):
"""
Create a signature for the data hashed in edph
using the secret key sk
:param edph: the ed25519ph state for the data
being signed
:type edph: crypto_sign_ed25519ph_state
:param sk: the ed25519 secret part of the signing key
:type sk: bytes
:return: ed25519ph signature
:rtype: bytes
"""
ensure(isinstance(edph, crypto_sign_ed25519ph_state),
'edph parameter must be a ed25519ph_state object',
raising=exc.TypeError)
ensure(isinstance(sk, bytes),
'secret key parameter must be a bytes object',
raising=exc.TypeError)
ensure(len(sk) == crypto_sign_SECRETKEYBYTES,
('secret key must be {0} '
'bytes long').format(crypto_sign_SECRETKEYBYTES),
raising=exc.TypeError)
signature = ffi.new("unsigned char[]", crypto_sign_BYTES)
rc = lib.crypto_sign_ed25519ph_final_create(edph.state,
signature,
ffi.NULL,
sk)
ensure(rc == 0,
'Unexpected library error',
raising=exc.RuntimeError)
return ffi.buffer(signature, crypto_sign_BYTES)[:]