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/*
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 * This is just a repository for a password.
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 * We don't want to encourage this, there's
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 * no server side.
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 */
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#include "dat.h"
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typedef struct State State;
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struct State
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{
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	Key *key;
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};
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enum
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{
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	HavePass,
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	Maxphase,
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};
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static char *phasenames[Maxphase] =
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{
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[HavePass]	"HavePass",
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};
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static int
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passinit(Proto *p, Fsstate *fss)
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{
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	int ret;
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	Key *k;
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	Keyinfo ki;
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	State *s;
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	ret = findkey(&k, mkkeyinfo(&ki, fss, nil), "%s", p->keyprompt);
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	if(ret != RpcOk)
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		return ret;
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	setattrs(fss->attr, k->attr);
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	s = emalloc(sizeof(*s));
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	s->key = k;
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	fss->ps = s;
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	fss->phase = HavePass;
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	return RpcOk;
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}
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static void
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passclose(Fsstate *fss)
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{
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	State *s;
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	s = fss->ps;
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	if(s->key)
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		closekey(s->key);
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	free(s);
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}
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static int
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passread(Fsstate *fss, void *va, uint *n)
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{
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	int m;
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	char buf[500];
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	char *pass, *user;
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	State *s;
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	s = fss->ps;
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	switch(fss->phase){
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	default:
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		return phaseerror(fss, "read");
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	case HavePass:
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		user = _strfindattr(s->key->attr, "user");
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		pass = _strfindattr(s->key->privattr, "!password");
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		if(user==nil || pass==nil)
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			return failure(fss, "passread cannot happen");
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		snprint(buf, sizeof buf, "%q %q", user, pass);
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		m = strlen(buf);
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		if(m > *n)
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			return toosmall(fss, m);
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		*n = m;
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		memmove(va, buf, m);
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		return RpcOk;
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	}
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}
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static int
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passwrite(Fsstate *fss, void*, uint)
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{
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	return phaseerror(fss, "write");
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}
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Proto pass =
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{
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.name=		"pass",
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.init=		passinit,
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.write=		passwrite,
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.read=		passread,
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.close=		passclose,
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.addkey=		replacekey,
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.keyprompt=	"user? !password?",
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};