1*5f0225f3SDavid du Colombier #include "os.h"
2*5f0225f3SDavid du Colombier #include <libsec.h>
3*5f0225f3SDavid du Colombier
4*5f0225f3SDavid du Colombier /* rfc2898 */
5*5f0225f3SDavid du Colombier void
pbkdf2_x(p,plen,s,slen,rounds,d,dlen,x,xlen)6*5f0225f3SDavid du Colombier pbkdf2_x(p, plen, s, slen, rounds, d, dlen, x, xlen)
7*5f0225f3SDavid du Colombier uchar *p, *s, *d;
8*5f0225f3SDavid du Colombier ulong plen, slen, dlen, rounds;
9*5f0225f3SDavid du Colombier DigestState* (*x)(uchar*, ulong, uchar*, ulong, uchar*, DigestState*);
10*5f0225f3SDavid du Colombier int xlen;
11*5f0225f3SDavid du Colombier {
12*5f0225f3SDavid du Colombier uchar block[256], tmp[256];
13*5f0225f3SDavid du Colombier ulong i, j, k, n;
14*5f0225f3SDavid du Colombier DigestState *ds;
15*5f0225f3SDavid du Colombier
16*5f0225f3SDavid du Colombier assert(xlen <= sizeof(tmp));
17*5f0225f3SDavid du Colombier
18*5f0225f3SDavid du Colombier for(i = 1; dlen > 0; i++, d += n, dlen -= n){
19*5f0225f3SDavid du Colombier tmp[3] = i;
20*5f0225f3SDavid du Colombier tmp[2] = i >> 8;
21*5f0225f3SDavid du Colombier tmp[1] = i >> 16;
22*5f0225f3SDavid du Colombier tmp[0] = i >> 24;
23*5f0225f3SDavid du Colombier ds = (*x)(s, slen, p, plen, nil, nil);
24*5f0225f3SDavid du Colombier (*x)(tmp, 4, p, plen, block, ds);
25*5f0225f3SDavid du Colombier memmove(tmp, block, xlen);
26*5f0225f3SDavid du Colombier for(j = 1; j < rounds; j++){
27*5f0225f3SDavid du Colombier (*x)(tmp, xlen, p, plen, tmp, nil);
28*5f0225f3SDavid du Colombier for(k=0; k<xlen; k++)
29*5f0225f3SDavid du Colombier block[k] ^= tmp[k];
30*5f0225f3SDavid du Colombier }
31*5f0225f3SDavid du Colombier n = dlen > xlen ? xlen : dlen;
32*5f0225f3SDavid du Colombier memmove(d, block, n);
33*5f0225f3SDavid du Colombier }
34*5f0225f3SDavid du Colombier }
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