text: #include <u.h>
  #include <libc.h>
  #include <venti.h>
  #include <libsec.h>
  
  void
  vtsha1(uchar score[VtScoreSize], uchar *p, int n)
  {
  	DigestState ds;
  
  	memset(&ds, 0, sizeof ds);
  	sha1(p, n, score, &ds);
  }
  
  int
  vtsha1check(uchar score[VtScoreSize], uchar *p, int n)
  {
  	DigestState ds;
  	uchar score2[VtScoreSize];
  
  	memset(&ds, 0, sizeof ds);
  	sha1(p, n, score2, &ds);
  	if(memcmp(score, score2, VtScoreSize) != 0) {
  		werrstr("vtsha1check failed");
  		return -1;
  	}
  	return 0;
  }
  