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7443c352e1
urbit/j/e/scr.c
Max G 7443c352e1 new bounds
2015-05-03 23:45:41 +03:00

278 lines
7.8 KiB
C
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/* j/5/scr.c
**
*/
#include "all.h"
#include <stdint.h>
#include <errno.h>
#include <crypto_scrypt.h>
int _crypto_scrypt(const uint8_t *, size_t, const uint8_t *, size_t,
uint64_t, uint32_t, uint32_t, uint8_t *, size_t);
/* functions
*/
u3_noun
u3qes_hsl(u3_atom p, u3_atom pl, u3_atom s, u3_atom sl, u3_atom n,
u3_atom r, u3_atom z, u3_atom d)
{
// asserting that n is power of 2 in _crypto_scrypt
if (!(_(u3a_is_atom(p)) && _(u3a_is_atom(s)) &&
_(u3a_is_cat(pl)) && _(u3a_is_cat(sl)) &&
_(u3a_is_cat(n)) && _(u3a_is_cat(r)) &&
_(u3a_is_cat(z)) && _(u3a_is_cat(d)) &&
(r != 0) && (z != 0) &&
(((c3_d)r * 128 * ((c3_d)n + z - 1)) <= (1 << 30))))
return u3m_bail(c3__exit);
c3_y* b_p = u3a_malloc(pl + 1); c3_y* b_s= u3a_malloc(sl + 1);
u3r_bytes(0, pl, b_p, p); u3r_bytes(0, sl, b_s, s);
b_p[pl] = 0; b_s[sl]=0;
c3_y* buf = u3a_malloc(d);
if (_crypto_scrypt(b_p, pl, b_s, sl, n, r, z, buf, d) != 0)
return u3m_bail(c3__exit);
u3_noun res = u3i_bytes(d, buf);
u3a_free(b_p); u3a_free(b_s); u3a_free(buf);
return res;
}
u3_noun
u3wes_hsl(u3_noun cor)
{
u3_noun p, pl, s, sl, n, r, z, d;
u3_noun q;
u3x_quil(u3r_at(u3x_sam, cor), &p, &pl, &s, &sl, &q);
u3x_qual(q, &n, &r, &z, &d);
return u3qes_hsl(p, pl, s, sl, n, r, z, d);
}
u3_noun
u3qes_hsh(u3_atom p, u3_atom s, u3_atom n, u3_atom r, u3_atom z, u3_atom d)
{
// asserting that n is power of 2 in _crypto_scrypt
if (!(_(u3a_is_atom(p)) && _(u3a_is_atom(s)) &&
_(u3a_is_cat(n)) && _(u3a_is_cat(r)) &&
_(u3a_is_cat(z)) && _(u3a_is_cat(d)) &&
(r != 0) && (z != 0) &&
(((c3_d)r * 128 * ((c3_d)n + z - 1)) <= (1 << 30))))
return u3m_bail(c3__exit);
c3_w pl = u3r_met(3, p); c3_w sl = u3r_met(3, s);
c3_y* b_p = u3a_malloc(pl + 1); c3_y* b_s= u3a_malloc(sl + 1);
u3r_bytes(0, pl, b_p, p); u3r_bytes(0, sl, b_s, s);
b_p[pl] = 0; b_s[sl]=0;
c3_y* buf = u3a_malloc(d);
if (_crypto_scrypt(b_p, pl, b_s, sl, n, r, z, buf, d) != 0)
return u3m_bail(c3__exit);
u3_noun res = u3i_bytes(d, buf);
u3a_free(b_p); u3a_free(b_s); u3a_free(buf);
return res;
}
u3_noun
u3wes_hsh(u3_noun cor)
{
u3_noun p, s, n, r, z, d;
u3_noun q;
u3x_quil(u3r_at(u3x_sam, cor), &p, &s, &n, &r, &q);
u3x_cell(q, &z, &d);
return u3qes_hsh(p, s, n, r, z, d);
}
u3_noun
u3qes_pbl(u3_atom p, u3_atom pl, u3_atom s, u3_atom sl,
u3_atom c, u3_atom d)
{
if (!(_(u3a_is_atom(p)) && _(u3a_is_atom(s)) &&
_(u3a_is_cat(pl)) && _(u3a_is_cat(sl)) &&
_(u3a_is_cat(c)) && _(u3a_is_cat(d)) &&
(d <= (1 << 30)) && (c <= (1 << 28)) &&
(c != 0)))
return u3m_bail(c3__exit);
c3_y* b_p = u3a_malloc(pl + 1); c3_y* b_s= u3a_malloc(pl + 1);
u3r_bytes(0, pl, b_p, p); u3r_bytes(0, sl, b_s, s);
b_p[pl] = 0; b_s[sl]=0;
c3_y* buf = u3a_malloc(d);
PBKDF2_SHA256(b_p, pl, b_s, sl, c, buf, d);
u3_noun res = u3i_bytes(d, buf);
u3a_free(b_p); u3a_free(b_s); u3a_free(buf);
return res;
}
u3_noun
u3wes_pbl(u3_noun cor)
{
u3_noun p, pl, s, sl, c, d;
u3_noun q;
u3x_quil(u3r_at(u3x_sam, cor), &p, &pl, &s, &sl, &q);
u3x_cell(q, &c, &d);
return u3qes_pbl(p, pl, s, sl, c, d);
}
u3_noun
u3qes_pbk(u3_atom p, u3_atom s, u3_atom c, u3_atom d)
{
if (!(_(u3a_is_atom(p)) && _(u3a_is_atom(s)) &&
_(u3a_is_cat(c)) && _(u3a_is_cat(d)) &&
(d <= (1 << 30)) && (c <= (1 << 28)) &&
(c != 0)))
return u3m_bail(c3__exit);
c3_w pl = u3r_met(3, p); c3_w sl = u3r_met(3, s);
c3_y* b_p = u3a_malloc(pl + 1); c3_y* b_s= u3a_malloc(pl + 1);
u3r_bytes(0, pl, b_p, p); u3r_bytes(0, sl, b_s, s);
b_p[pl] = 0; b_s[sl]=0;
c3_y* buf = u3a_malloc(d);
PBKDF2_SHA256(b_p, pl, b_s, sl, c, buf, d);
u3_noun res = u3i_bytes(d, buf);
u3a_free(b_p); u3a_free(b_s); u3a_free(buf);
return res;
}
u3_noun
u3wes_pbk(u3_noun cor)
{
u3_noun p, s, c, d;
u3x_qual(u3r_at(u3x_sam, cor), &p, &s, &c, &d);
return u3qes_pbk(p, s, c, d);
}
/*-
* Copyright 2009 Colin Percival
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file was originally written by Colin Percival as part of the Tarsnap
* online backup system.
*/
/**
* crypto_scrypt(passwd, passwdlen, salt, saltlen, N, r, p, buf, buflen):
* Compute scrypt(passwd[0 .. passwdlen - 1], salt[0 .. saltlen - 1], N, r,
* p, buflen) and write the result into buf. The parameters r, p, and buflen
* must satisfy r * p < 2^30 and buflen <= (2^32 - 1) * 32. The parameter N
* must be a power of 2 greater than 1.
*
* Return 0 on success; or -1 on error.
*/
int
_crypto_scrypt(const uint8_t * passwd, size_t passwdlen,
const uint8_t * salt, size_t saltlen, uint64_t N, uint32_t r, uint32_t p,
uint8_t * buf, size_t buflen)
{
void * B0, * V0, * XY0;
uint8_t * B;
uint32_t * V;
uint32_t * XY;
uint32_t i;
if (((N & (N-1)) != 0) || N == 0)
goto err0;
/* Sanity-check parameters. */
#if SIZE_MAX > UINT32_MAX
if (buflen > (((uint64_t)(1) << 32) - 1) * 32) {
errno = EFBIG;
goto err0;
}
#endif
if ((uint64_t)(r) * (uint64_t)(p) >= (1 << 30)) {
errno = EFBIG;
goto err0;
}
if (((N & (N - 1)) != 0) || (N == 0)) {
errno = EINVAL;
goto err0;
}
if ((r > SIZE_MAX / 128 / p) ||
#if SIZE_MAX / 256 <= UINT32_MAX
(r > (SIZE_MAX - 64) / 256) ||
#endif
(N > SIZE_MAX / 128 / r)) {
errno = ENOMEM;
goto err0;
}
/* Allocate memory. */
if ((B0 = u3a_malloc(128 * r * p + 63)) == NULL)
goto err0;
B = (uint8_t *)(((uintptr_t)(B0) + 63) & ~ (uintptr_t)(63));
if ((XY0 = u3a_malloc(256 * r + 64 + 63)) == NULL)
goto err1;
XY = (uint32_t *)(((uintptr_t)(XY0) + 63) & ~ (uintptr_t)(63));
if ((V0 = u3a_malloc(128 * r * N + 63)) == NULL)
goto err2;
V = (uint32_t *)(((uintptr_t)(V0) + 63) & ~ (uintptr_t)(63));
/* 1: (B_0 ... B_{p-1}) <-- PBKDF2(P, S, 1, p * MFLen) */
PBKDF2_SHA256(passwd, passwdlen, salt, saltlen, 1, B, p * 128 * r);
/* 2: for i = 0 to p - 1 do */
for (i = 0; i < p; i++) {
/* 3: B_i <-- MF(B_i, N) */
smix(&B[i * 128 * r], r, N, V, XY);
}
/* 5: DK <-- PBKDF2(P, B, 1, dkLen) */
PBKDF2_SHA256(passwd, passwdlen, B, p * 128 * r, 1, buf, buflen);
/* Free memory. */
u3a_free(V0);
u3a_free(XY0);
u3a_free(B0);
/* Success! */
return (0);
err2:
u3a_free(XY0);
err1:
u3a_free(B0);
err0:
/* Failure! */
return (-1);
}
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