#include "os.h"#include <libsec.h> /* rfc2898 */voidpbkdf2_x(uchar *p, ulong plen, uchar *s, ulong slen, ulong rounds, uchar *d, ulong dlen, DigestState* (*x)(uchar*, ulong, uchar*, ulong, uchar*, DigestState*), int xlen){ uchar block[256], tmp[256]; ulong i, j, k, n; DigestState *ds; assert(xlen <= sizeof(tmp)); for(i = 1; dlen > 0; i++, d += n, dlen -= n){ tmp[3] = i; tmp[2] = i >> 8; tmp[1] = i >> 16; tmp[0] = i >> 24; ds = (*x)(s, slen, p, plen, nil, nil); (*x)(tmp, 4, p, plen, block, ds); memmove(tmp, block, xlen); for(j = 1; j < rounds; j++){ (*x)(tmp, xlen, p, plen, tmp, nil); for(k=0; k<xlen; k++) block[k] ^= tmp[k]; } n = dlen > xlen ? xlen : dlen; memmove(d, block, n); }}
#include "os.h"
#include <libsec.h>
/* rfc2898 */
void
pbkdf2_x(uchar *p, ulong plen, uchar *s, ulong slen,
ulong rounds, uchar *d, ulong dlen,
DigestState* (*x)(uchar*, ulong, uchar*, ulong, uchar*, DigestState*), int xlen)
{
uchar block[256], tmp[256];
ulong i, j, k, n;
DigestState *ds;
assert(xlen <= sizeof(tmp));
for(i = 1; dlen > 0; i++, d += n, dlen -= n){
tmp[3] = i;
tmp[2] = i >> 8;
tmp[1] = i >> 16;
tmp[0] = i >> 24;
ds = (*x)(s, slen, p, plen, nil, nil);
(*x)(tmp, 4, p, plen, block, ds);
memmove(tmp, block, xlen);
for(j = 1; j < rounds; j++){
(*x)(tmp, xlen, p, plen, tmp, nil);
for(k=0; k<xlen; k++)
block[k] ^= tmp[k];
}
n = dlen > xlen ? xlen : dlen;
memmove(d, block, n);
}
}