Major rearrangement. Renamed directories: "fko" to "lib", "src" to "client". Added "common" and "server" directories. Setup autoconf to allow disabling the server and/or client builds.

git-svn-id: file:///home/mbr/svn/fwknop/trunk@127 510a4753-2344-4c79-9c09-4d669213fbeb

client/getpasswd.c

@@ -0,0 +1,213 @@
+/* $Id$
+ *****************************************************************************
+ *
+ * File:    getpasswd.c
+ *
+ * Author:  Damien S. Stuart
+ *
+ * Purpose: Routines for obtaining a password from a user.
+ *
+ * Copyright (C) 2009 Damien Stuart (dstuart@dstuart.org)
+ *
+ *  License (GNU Public License):
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program; if not, write to the Free Software
+ *     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
+ *     USA
+ *
+ *****************************************************************************
+*/
+#include <stdio.h>
+#include <signal.h>
+
+#ifdef WIN32
+  #include <conio.h>
+#else
+  #include <termios.h>
+#endif
+
+#include "fwknop_common.h"
+#include "getpasswd.h"
+
+#define MAX_PASS_LEN    128
+
+/* Function for accepting password input from users
+*/
+char*
+getpasswd(const char *prompt)
+{
+    static char     pwbuf[MAX_PASS_LEN + 1] = {0};
+    char           *ptr;    
+    int             c;
+
+#ifndef WIN32
+    FILE           *fp;
+	sigset_t        sig, old_sig;
+    struct termios  ts, old_ts;
+
+    if((fp = fopen(ctermid(NULL), "r+")) == NULL)
+        return(NULL);
+
+    setbuf(fp, NULL);
+
+    /* Setup blocks for SIGINT and SIGTSTP and save the original signal
+     * mask.
+    */
+    sigemptyset(&sig);
+    sigaddset(&sig, SIGINT);
+    sigaddset(&sig, SIGTSTP);
+    sigprocmask(SIG_BLOCK, &sig, &old_sig);
+
+    /* Save current tty state for later restoration after we disable echo
+     * of characters to the tty.
+    */
+    tcgetattr(fileno(fp), &ts);
+    old_ts = ts;
+    ts.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);
+    tcsetattr(fileno(fp), TCSAFLUSH, &ts);
+
+    fputs(prompt, fp);
+#endif
+
+    /* Read in the password.
+    */
+    ptr = pwbuf;
+#ifdef WIN32
+	_cputs(prompt);
+    while((c = _getch()) != '\r')
+	{
+		/* Handle a backspace without backing up too far.
+		*/
+		if(c == '\b')
+		{
+			if(ptr != pwbuf)
+				*ptr--;
+
+			continue;
+		}
+
+		/* Handle a Ctrl-U to clear the password entry and start over
+		 * (like it works under Unix).
+	    */
+		if(c == 0x15)
+		{
+			ptr = pwbuf;
+			continue;
+		}
+#else
+	while((c = getc(fp)) != EOF && c != '\n')
+	{
+#endif
+        if(ptr < &pwbuf[MAX_PASS_LEN])
+            *ptr++ = c;
+	}
+
+	/* Null terminate the password.
+    */
+    *ptr = 0;
+
+#ifndef WIN32
+    /* we can go ahead and echo out a newline.
+    */
+    putc('\n', fp);
+
+	/* Restore our tty state and signal handlers.
+    */
+    tcsetattr(fileno(fp), TCSAFLUSH, &old_ts);
+    sigprocmask(SIG_BLOCK, &old_sig, NULL);
+
+    fclose(fp);
+#else
+	/* In Windows, it would be a CR-LF
+	*/
+	_putch('\r');
+	_putch('\n');
+#endif
+
+    return(pwbuf);
+}
+
+/* Function for accepting password input from from a file
+*/
+char*
+getpasswd_file(const char *pw_file, const char *server_str)
+{
+    FILE           *pwfile_ptr;
+    unsigned int    numLines = 0, i = 0, found_dst;
+
+    static char     pwbuf[MAX_PASS_LEN + 1]     = {0};
+    char            conf_line_buf[MAX_LINE_LEN] = {0};
+    char            tmp_char_buf[MAX_LINE_LEN]  = {0};
+    char           *lptr;
+
+    if ((pwfile_ptr = fopen(pw_file, "r")) == NULL)
+    {
+        fprintf(stderr, "[*] Could not open config file: %s\n", pw_file);
+        exit(1);
+    }
+
+    while ((fgets(conf_line_buf, MAX_LINE_LEN, pwfile_ptr)) != NULL)
+    {
+        numLines++;
+        conf_line_buf[MAX_LINE_LEN-1] = '\0';
+        lptr = conf_line_buf;
+
+        memset(tmp_char_buf, 0x0, MAX_LINE_LEN);
+
+        while (*lptr == ' ' || *lptr == '\t' || *lptr == '=')
+            lptr++;
+
+        /* Get past comments and empty lines.
+        */
+        if (*lptr == '#' || *lptr == '\n' || *lptr == '\r' || *lptr == '\0' || *lptr == ';')
+            continue;
+
+        /* Look for a line like "<SPA destination IP>: <password>" - this allows
+        * multiple keys to be placed within the same file, and the client will
+        * reference the matching one for the SPA server we are contacting
+        */
+        found_dst = 1;
+        for (i=0; i < strlen(server_str); i++)
+            if (*lptr++ != server_str[i])
+                found_dst = 0;
+
+        if (! found_dst)
+            continue;
+
+        if (*lptr == ':')
+            lptr++;
+        else
+            continue;
+
+        /* Skip whitespace until we get to the password
+        */
+        while (*lptr == ' ' || *lptr == '\t' || *lptr == '=')
+            lptr++;
+
+        i = 0;
+        while (*lptr != '\0' && *lptr != '\n') {
+            pwbuf[i] = *lptr;
+            lptr++;
+            i++;
+        }
+        pwbuf[i] = '\0';
+    }
+
+    fclose(pwfile_ptr);
+
+    if (pwbuf[0] == '\0') {
+        fprintf(stderr, "[*] Could not get password for IP: %s from: %s\n",
+            server_str, pw_file);
+        exit(1);
+    }
+
+    return pwbuf;
+}
+
+/***EOF***/