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#include "ssh.h"
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static int
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authtisfn(Conn *c)
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{
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	int fd, n;
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	char *chal, resp[256];
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	Msg *m;
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	if(!c->interactive)
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		return -1;
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	debug(DBG_AUTH, "try TIS\n");
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	sendmsg(allocmsg(c, SSH_CMSG_AUTH_TIS, 0));
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	m = recvmsg(c, -1);
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	switch(m->type){
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	default:
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		badmsg(m, SSH_SMSG_AUTH_TIS_CHALLENGE);
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	case SSH_SMSG_FAILURE:
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		free(m);
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		return -1;
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	case SSH_SMSG_AUTH_TIS_CHALLENGE:
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		break;
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	}
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	chal = getstring(m);
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	free(m);
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	if((fd = open("/dev/cons", ORDWR)) < 0)
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		error("can't open console");
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	fprint(fd, "TIS Authentication\n%s", chal);
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	n = read(fd, resp, sizeof resp-1);
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	if(n < 0)
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		resp[0] = '\0';
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	else
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		resp[n] = '\0';
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	if(resp[0] == 0 || resp[0] == '\n')
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		return -1;
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	m = allocmsg(c, SSH_CMSG_AUTH_TIS_RESPONSE, 4+strlen(resp));
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	putstring(m, resp);
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	sendmsg(m);
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	m = recvmsg(c, -1);
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	switch(m->type){
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	default:
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		badmsg(m, 0);
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	case SSH_SMSG_SUCCESS:
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		free(m);
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		return 0;
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	case SSH_SMSG_FAILURE:
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		free(m);
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		return -1;
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	}
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}
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Auth authtis =
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{
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	SSH_AUTH_TIS,
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	"tis",
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	authtisfn,
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};