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#include <u.h>
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#include <libc.h>
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#include <mp.h>
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#include <fcall.h>
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#include <thread.h>
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#include <9p.h>
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#include <libsec.h>
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#include "netssh.h"
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static QLock aeslock;
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struct CipherState {
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	AESstate state;
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};
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static CipherState *
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initaes(Conn *c, int dir, int bits)
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{
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	CipherState *cs;
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	qlock(&aeslock);
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	cs = emalloc9p(sizeof(CipherState));
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	if(dir)
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		setupAESstate(&cs->state, c->s2cek, bits/8, c->s2civ);
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	else
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		setupAESstate(&cs->state, c->c2sek, bits/8, c->c2siv);
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	qunlock(&aeslock);
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	return cs;
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}
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static CipherState*
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initaes128(Conn *c, int dir)
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{
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	return initaes(c, dir, 128);
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}
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static CipherState*
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initaes192(Conn *c, int dir)
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{
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	return initaes(c, dir, 192);
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}
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static CipherState*
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initaes256(Conn *c, int dir)
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{
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	return initaes(c, dir, 256);
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}
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static void
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encryptaes(CipherState *cs, uchar *buf, int nbuf)
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{
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	if(cs->state.setup != 0xcafebabe || cs->state.rounds > AESmaxrounds)
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		return;
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	qlock(&aeslock);
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	aesCBCencrypt(buf, nbuf, &cs->state);
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	qunlock(&aeslock);
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}
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static void
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decryptaes(CipherState *cs, uchar *buf, int nbuf)
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{
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	if(cs->state.setup != 0xcafebabe || cs->state.rounds > AESmaxrounds)
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		return;
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	qlock(&aeslock);
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	aesCBCdecrypt(buf, nbuf, &cs->state);
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	qunlock(&aeslock);
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}
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Cipher cipheraes128 = {
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	"aes128-cbc",
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	AESbsize,
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	initaes128,
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	encryptaes,
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	decryptaes,
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};
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Cipher cipheraes192 = {
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	"aes192-cbc",
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	AESbsize,
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	initaes192,
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	encryptaes,
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	decryptaes,
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};
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Cipher cipheraes256 = {
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	"aes256-cbc",
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	AESbsize,
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	initaes256,
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	encryptaes,
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	decryptaes,
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};