ref: 51afb6e1319846bf3f1a4ab6cf69fdf7cf3865e1
dir: /libsec/pbkdf2.c/
#include "os.h" #include <libsec.h> /* rfc2898 */ void pbkdf2_x(p, plen, s, slen, rounds, d, dlen, x, xlen) uchar *p, *s, *d; ulong plen, slen, dlen, rounds; 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); } }