code: plan9front

ref: 5622b0bbd878dbc34045cc6fd37cffa64461eabe
dir: /sys/src/cmd/auth/httpauth.c/

#include <u.h>
#include <libc.h>
#include <auth.h>

void
usage(void)
{
	fprint(2, "usage:\n\t%s user pass\n\t%s authorization\n", argv0, argv0);
	exits("usage");
}

void
main(int argc, char *argv[])
{
	char *a, *s;
	int n;

	ARGBEGIN {
	} ARGEND

	switch(argc){
	default:
		usage();
		return;
	case 2:
		s = argv[0];
		a = argv[1];
		break;
	case 1:
		a = argv[0];
		if(cistrncmp(a, "Basic ", 6) == 0)
			a += 6;
		n = strlen(a);
		if((s = malloc(n+1)) == nil)
			sysfatal("out of memory");
		if((n = dec64((uchar*)s, n, a, n)) <= 0)
			sysfatal("bad base64");
		s[n] = '\0';
		if((a = strchr(s, ':')) == nil)
			sysfatal("bad format");
		*a++ = '\0';
		break;
	}
	if(*s == '\0')
		sysfatal("empty username");
	if(auth_userpasswd(s, a) == nil)
		sysfatal("bad password");
	print("%s\n", s);
	exits(nil);
}