From 65662db674cb3529331dc5db83be9bd9220f072d Mon Sep 17 00:00:00 2001
From: John Klug <john.klug@multitech.com>
Date: Tue, 10 Dec 2019 13:41:57 -0600
Subject: Read password from stdin

---
 src/hashpwd.cpp | 43 ++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 38 insertions(+), 5 deletions(-)

(limited to 'src/hashpwd.cpp')

diff --git a/src/hashpwd.cpp b/src/hashpwd.cpp
index 6bc322c..1ea3e2c 100644
--- a/src/hashpwd.cpp
+++ b/src/hashpwd.cpp
@@ -153,6 +153,7 @@ void usage(void)
       "    -V              version" << endl <<
       "    -v              verbose" << endl <<
       "    -d did          Device ID (serial #)" << endl <<
+      "    -i              Read password from standard input" << endl <<
       "    -m mac          Ethernet mac address" << endl <<
       "    -p              password" << endl <<
       "    -u uuid         UUID (base 16)" << endl <<
@@ -163,17 +164,20 @@ void usage(void)
 }
 
 int main(int argc, char **argv) {
-	int opt = 0, p = 0, d = 0, m = 0, u=0;
+	int opt = 0, p = 0, d = 0, m = 0, u=0, iopt = 0;
+	char c;
 	unsigned long long fudge = 0;
 	short unsigned int prefix;
 	string did, mac, pwd, salt, uuid;
+        int supplied_password = 0;
 
-    while ((opt = getopt(argc,argv,"Vd:m:p:u:v")) != EOF)
+    while ((opt = getopt(argc,argv,"Vd:im:p:u:v")) != EOF)
         switch(opt)
         {
             case 'V': cout << MYVERSION << endl; exit(0);
             case 'v': v = 1; cout << " verbose" <<endl; break;
             case 'd': d = 1; did = optarg ; (v==1) && cout << "device-id is " << did << endl; break;
+            case 'i': iopt = 1; (v==1) && cout << "Reading password from stdin " << endl; break;
             case 'm': m = 1; mac = optarg ; (v==1) && cout << "Ethernet mac is " << mac << endl; break;
             case 'p': p = 1; pwd = optarg ; (v==1) && cout << "User defined password is \"" << pwd << "\"" << endl; break;
             case 'u': u = 1; uuid = optarg ; (v==1) && cout << "UUID is \"" << uuid << "\"" << endl; break;
@@ -187,6 +191,15 @@ int main(int argc, char **argv) {
     		cout << "  argv[" << i << "]=\"" << argv[i] << "\"" << endl;
     }
 
+    if (p && iopt) {
+        cout << "Cannot have both a command line password and standard input password" << endl;
+        usage();
+    }
+
+    if (p || iopt)
+        supplied_password = 1;
+
+
     if ((p && d) || (p && m)) {
     	cout << "Must use either a supplied password or Device ID and Ethernet MAC address, but not all three." << endl;
     	usage();
@@ -212,13 +225,33 @@ int main(int argc, char **argv) {
 
     (v == 1) && cout << "prefix is " << prefixStream.str() << endl;
 
+    if(iopt) {
+        while(1)
+        {
+            cin.get(c);
+            if (cin.eof())
+                break;
+            pwd.push_back(c);
+        }
+    }
+
+    // Dump password in hex
+    if(v == 1) {
+        cout.width(2);
+        cout.fill(0);
+        cout << hex;
+        cout << right;
+        for(unsigned int i=0; i<pwd.length(); i++)
+            cout << hex << right << (int)pwd[i];
+        cout << endl;
+    }
 
     string passwd_str;
     string passwd0, passwdnew;
     SHA256_CTX sha256;
     unsigned char hash[SHA256_DIGEST_LENGTH];
 
-    if(!p) {
+    if(!(p || iopt)) {
         if (m)
             passwd0 = did + "|" + mac;
         else if (u)
@@ -227,7 +260,7 @@ int main(int argc, char **argv) {
 
 	    while (1) {
 	    	unsigned char append[9];
-    	    (v == 1) && cout << "pwdinput: " << passwdnew << endl;
+                (v == 1) && cout << "pwdinput: " << passwdnew << endl;
 
     		SHA256_Init(&sha256);
     		SHA256_Update(&sha256,passwdnew.c_str(),passwdnew.length());
@@ -264,7 +297,7 @@ int main(int argc, char **argv) {
 
     cout << "pass=" << pwd << endl;
 
-   	passwd_str = prefixStream.str() + pwd + salt;
+    passwd_str = prefixStream.str() + pwd + salt;
 
     SHA256_Init(&sha256);
     SHA256_Update(&sha256,passwd_str.c_str(),passwd_str.length());
-- 
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