scryptdec_buf(inbuf, inbuflen, outbuf, outlen, passwd, passwdlen,
maxmem, maxmemfrac, maxtime):
Decrypt inbuflen bytes from inbuf, writing the result into outbuf and the
decrypted data length to outlen. The allocated length of outbuf must
be at least inbuflen.
scryptdec_buf(inbuf, inbuflen, outbuf, outlen, passwd, passwdlen, maxmem, maxmemfrac, maxtime): Decrypt inbuflen bytes from inbuf, writing the result into outbuf and the decrypted data length to outlen. The allocated length of outbuf must be at least inbuflen.