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#include "ssh.h"
struct CipherState
{
DESstate enc3des[3];
DESstate dec3des[3];
};
static CipherState*
init3des(Conn *c, int)
{
int i;
CipherState *cs;
cs = emalloc(sizeof(CipherState));
for(i=0; i<3; i++){
setupDESstate(&cs->enc3des[i], c->sesskey+8*i, nil);
setupDESstate(&cs->dec3des[i], c->sesskey+8*i, nil);
}
return cs;
}
static void
encrypt3des(CipherState *cs, uchar *buf, int nbuf)
{
desCBCencrypt(buf, nbuf, &cs->enc3des[0]);
desCBCdecrypt(buf, nbuf, &cs->enc3des[1]);
desCBCencrypt(buf, nbuf, &cs->enc3des[2]);
}
static void
decrypt3des(CipherState *cs, uchar *buf, int nbuf)
{
desCBCdecrypt(buf, nbuf, &cs->dec3des[2]);
desCBCencrypt(buf, nbuf, &cs->dec3des[1]);
desCBCdecrypt(buf, nbuf, &cs->dec3des[0]);
}
Cipher cipher3des =
{
SSH_CIPHER_3DES,
"3des",
init3des,
encrypt3des,
decrypt3des,
};
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