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1 /*-
2  * Copyright 2009 Colin Percival
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  *
26  * This file was originally written by Colin Percival as part of the Tarsnap
27  * online backup system.
28  */
29 #ifndef _CRYPTO_SCRYPT_H_
30 #define _CRYPTO_SCRYPT_H_
31 
32 #include <stdint.h>
33 
34 /**
35  * crypto_scrypt(passwd, passwdlen, salt, saltlen, N, r, p, buf, buflen):
36  * Compute scrypt(passwd[0 .. passwdlen - 1], salt[0 .. saltlen - 1], N, r,
37  * p, buflen) and write the result into buf.  The parameters r, p, and buflen
38  * must satisfy r * p < 2^30 and buflen <= (2^32 - 1) * 32.  The parameter N
39  * must be a power of 2 greater than 1.
40  *
41  * Return 0 on success; or -1 on error.
42  */
43 int crypto_scrypt(const uint8_t *, size_t, const uint8_t *, size_t, uint64_t,
44     uint32_t, uint32_t, uint8_t *, size_t);
45 
46 #endif /* !_CRYPTO_SCRYPT_H_ */
47