wm: teppich

Download patch

ref: c1c72f6cfd9f4360993888dc306eeb7bbf1f4256
parent: 0406ab471ab3c21903bd6c331cb75426b9e7fb1c
author: mkf <mkf@cloud9p.org>
date: Sun Dec 3 02:24:08 EST 2023 

cmd/login: import


--- /dev/null
+++ b/cmd/login.c
@@ -1,0 +1,119 @@
+#include <u.h>
+#include <libc.h>
+#include <err.h>
+#include <user.h>
+#include <ps2.h>
+
+#include <mem.h>
+
+char answers[32][256] =
+{
+	"Authtication failure\n",
+
+	/* uhh... */
+	"Better luck next time!\n",
+	"Try harder.\n",
+	"lol.\n",
+	"Nice try.\n",
+	"Use hashcat.\n",
+	"Not even close.\n",
+	"Yawn...\n",
+	"Did you expected me to accept this?\n",
+	"Segmention fault\n",
+	"Segmention fault (core dumped)\n"
+	"Divison by zero\n",
+	"General protection fault\n",
+	"login 6817489: suicide: invalid address 0x0/0 in sys call pc=0x40cf\n",
+	"Click here to reset your password.\n",
+	"Consider this as a BSOD.\n",
+	"Cry about it.\n",
+	"This password is already used by <nil>.\n",
+	"my aunt could type better than you\n",
+
+	"login.exe has stopped working\n"
+	"A problem caused the program to stop working correctly."
+	"Teppich will close the program and notify you if a solution is available.\n",
+};
+
+static int
+usage()
+{
+	printf("usage: login username\n");
+	return USAGE;
+}
+
+static int
+checkpass(char *pass, user_t *u)
+{
+	if(u != nil && u->pass == adler32(pass))
+		return OK;
+	return INCORRECT_PASSWD;
+}
+
+int
+login_main(int argc, char **argv)
+{
+	int i;
+	char c, *p;
+	ll_t *t;
+	user_t *u;
+
+
+	if(argc != 2)
+		return usage();
+
+	u = nil;
+	t = users;
+	/* search for user */
+	while(t != nil)
+	{
+		u = (user_t*)t->val;
+		if(!strcmp(u->name, argv[1]))
+			break;
+		t = (ll_t*)t->next;
+	}
+	printf("Password: ");
+	i = 0;
+	p = malloc(PASSWD_MAX);
+	
+	while(i < PASSWD_MAX - 1)
+	{
+		c = ps2_getc();
+		
+		if(c == '\b')
+		{
+			if(i)
+				i--;
+			p[i] = '\0';
+			printf("\b");
+			continue;
+		}
+		else if(c == '\r')
+		{
+			p[i] = '\0';
+			break;
+		}
+		p[i] = c;
+		printf("*");
+		i++;
+	}
+	printf("\n");
+	
+
+	if(i > PASSWD_MAX)
+	{
+		printf("\noverflow!\n");
+		return OVERFLOW;
+	}
+
+	if(checkpass(p, u) == OK)
+	{
+		cuser = *u;
+		return OK;
+	}
+	else
+	{
+		printf("%s", answers[(i) % (sizeof(answers) / sizeof(char*))]);
+		return AUTH_FAILED;
+	}
+}