From 3465aec7e1529ed865ff8c30bcacb677fe7ba47c Mon Sep 17 00:00:00 2001
From: Thomas Osterried <thomas@osterried.de>
Date: Sat, 16 Feb 2008 17:59:33 +0000
Subject: 	new feature: bcpasswd authentication type "unix". 	
 user has now also the choice to use the standard unix 		passwd/shadow
 authentication

---
 ax25/access.c  | 28 ++++++++++++++++++++++++----
 ax25/access.h  |  1 +
 ax25/axspawn.c | 10 +++++++---
 3 files changed, 32 insertions(+), 7 deletions(-)

diff --git a/ax25/access.c b/ax25/access.c
index 46e010d..c431289 100644
--- a/ax25/access.c
+++ b/ax25/access.c
@@ -121,9 +121,16 @@ void ask_pw_sys(char *prompt, char *pass_want, char *pw)
 		conv_randomize();
 
 	for (i = 0; i < 5; i++) {
+		int k;
+again:
 		j = conv_random(pwlen, 0);
 		/* store generated request-numbers  */
 		five_digits[i] = j+1; /* pos0 refers as 1  */
+		/* same number again? */
+		for (k = 0; k < i; k++) {
+			if (five_digits[k] == five_digits[i])
+				goto again;
+		}
 		/* store expected string in cp->passwd  */
 		pass_want[i] = pw[j];
 	}
@@ -218,6 +225,9 @@ void write_example_passwd(char *pwfile, char pwlocation, struct passwd *pw) {
 	fprintf(f, "# %smd5:%s\n", (pwlocation == SYSTEMPW ? "username:" : ""), generate_rand_pw(MINPWLEN_MD5));
 	fprintf(f, "# sys/baycom standard (not very secure) - length: >= %d and <= %d characters\n", MINPWLEN_SYS, PASSSIZE);
 	fprintf(f, "# %ssys:%s\n", (pwlocation == SYSTEMPW ? "username:" : ""), generate_rand_pw(MINPWLEN_SYS));
+	fprintf(f, "# unix standard (plaintext): no password is read here. Your password is looked\n");
+	fprintf(f, "#   up during login in the system password table /etc/passwd or /etc/shadow\n");
+	fprintf(f, "# unix\n");
 	fclose(f);
 }
 
@@ -333,9 +343,14 @@ char *read_pwd (struct passwd *pw, int *pwtype)
 			} else {
 				p_buf = buf;
 			}
-			if (!(pass = strchr(p_buf, ':')))
-				continue;
-			*pass++ = 0;
+
+			if (!Strcasecmp(p_buf, "unix")) {
+				pass = p_buf;
+			} else {
+				if (!(pass = strchr(p_buf, ':')))
+					continue;
+				*pass++ = 0;
+			}
 
 			while (*pass && isspace(*pass & 0xff))
 				pass++;
@@ -347,8 +362,13 @@ char *read_pwd (struct passwd *pw, int *pwtype)
 				*pwtype = PW_MD5;
 				goto found;
 			} else if ( (*pwtype & PW_SYS) && (!Strcasecmp(p_buf, "sys") || !strcmp(p_buf, "baycom")) ) {
+				fclose(f);
 				*pwtype = PW_SYS;
 				goto found;
+			} else if ( (*pwtype & PW_UNIX) &&  (!Strcasecmp(p_buf, "unix") ) ) {
+				fclose(f);
+				*pwtype = PW_UNIX;
+				return 0;
 			}
 		}
 	}
@@ -360,7 +380,7 @@ found:
 	len = strlen(pass);
 
 	if ((*pwtype == PW_SYS && len < MINPWLEN_SYS) || (*pwtype == PW_MD5 && len < MINPWLEN_MD5)) {
-		sprintf(buf, "Password in in password file too short\r");
+		sprintf(buf, "Password in password file too short\r");
 		write_ax25(buf, strlen(buf), 1);
 		goto end;
 	}
diff --git a/ax25/access.h b/ax25/access.h
index 12e4666..4901418 100644
--- a/ax25/access.h
+++ b/ax25/access.h
@@ -11,6 +11,7 @@
 #define PW_CLEARTEXT     1
 #define PW_SYS           2
 #define PW_MD5           4
+#define PW_UNIX		 8
 
 void ask_pw_sys(char *prompt, char *pass_want, char *pw);
 void ask_pw_md5(char *prompt, char *pass_want, char *pw);
diff --git a/ax25/axspawn.c b/ax25/axspawn.c
index bdf14a9..14f897f 100644
--- a/ax25/axspawn.c
+++ b/ax25/axspawn.c
@@ -1,6 +1,6 @@
 /*
  *
- * $Id: axspawn.c,v 1.13 2007/03/11 13:58:34 dl9sau Exp $
+ * $Id: axspawn.c,v 1.14 2008/02/16 17:59:33 dl9sau Exp $
  *
  * axspawn.c - run a program from ax25d.
  *
@@ -1379,7 +1379,7 @@ int main(int argc, char **argv)
 	read_config();
 
 	if (!pwtype)
-		pwtype = (PW_CLEARTEXT | PW_SYS | PW_MD5);
+		pwtype = (PW_CLEARTEXT | PW_SYS | PW_MD5 | PW_UNIX);
 	pwtype_orig = pwtype;
 	if (!*prompt) {
 		if (gethostname(buf, sizeof(buf)) < 0) {
@@ -1560,11 +1560,15 @@ int main(int argc, char **argv)
 	
 again:
 	if (!(pwd = read_pwd(pw, &pwtype))) {
-		if (!pwtype || pwtype != PW_CLEARTEXT) {
+		if ((!pwtype || pwtype != PW_CLEARTEXT) && (pwtype != PW_UNIX)) {
 			sleep (EXITDELAY);
 			return 1;
 		}
 	}
+	if (pwtype == PW_UNIX) {
+		pwtype = PW_CLEARTEXT;
+		pwcheck = 1;
+	}
 
 	if (pwtype != PW_CLEARTEXT) {
 		char pass_want[PASSSIZE+1];
-- 
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