def crypto_pwhash_scryptsalsa208sha256_str(
passwd, opslimit=SCRYPT_OPSLIMIT_INTERACTIVE,
memlimit=SCRYPT_MEMLIMIT_INTERACTIVE):
"""
Derive a cryptographic key using the ``passwd`` and ``salt``
given as input, returning a string representation which includes
the salt and the tuning parameters.
The returned string can be directly stored as a password hash.
See :py:func:`.crypto_pwhash_scryptsalsa208sha256` for a short
discussion about ``opslimit`` and ``memlimit`` values.
:param bytes passwd:
:param int opslimit:
:param int memlimit:
:return: serialized key hash, including salt and tuning parameters
:rtype: bytes
"""
buf = ffi.new("char[]", SCRYPT_STRBYTES)
ret = lib.crypto_pwhash_scryptsalsa208sha256_str(buf, passwd,
len(passwd),
opslimit,
memlimit)
ensure(ret == 0, 'Unexpected failure in password hashing',
raising=exc.RuntimeError)
return ffi.string(buf)
def crypto_pwhash_scryptsalsa208sha256_str(
passwd,
opslimit=SCRYPT_OPSLIMIT_INTERACTIVE,
memlimit=SCRYPT_MEMLIMIT_INTERACTIVE):
"""
Derive a cryptographic key using the ``passwd`` and ``salt``
given as input, returning a string representation which includes
the salt and the tuning parameters.
The returned string can be directly stored as a password hash.
See :py:func:`.crypto_pwhash_scryptsalsa208sha256` for a short
discussion about ``opslimit`` and ``memlimit`` values.
:param bytes passwd:
:param int opslimit:
:param int memlimit:
:return: serialized key hash, including salt and tuning parameters
:rtype: bytes
"""
buf = ffi.new("char[]", SCRYPT_STRBYTES)
ret = lib.crypto_pwhash_scryptsalsa208sha256_str(buf, passwd, len(passwd),
opslimit, memlimit)
ensure(ret == 0,
'Unexpected failure in password hashing',
raising=exc.RuntimeError)
return ffi.string(buf)