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