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List:       squid-cvs
Subject:    /bzr/squid3/trunk/ r12762: Bug 3831: basic_ncsa_auth Blowfish and SHA support
From:       Amos Jeffries <squid3 () treenet ! co ! nz>
Date:       2013-04-17 11:58:23
Message-ID: 20130417120004.74155.qmail () squid-cache ! org
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------------------------------------------------------------
revno: 12762
fixes bug(s): http://bugs.squid-cache.org/show_bug.cgi?id=3831
committer: Amos Jeffries <squid3@treenet.co.nz>
branch nick: trunk
timestamp: Wed 2013-04-17 05:58:23 -0600
message:
  Bug 3831: basic_ncsa_auth Blowfish and SHA support
modified:
  helpers/basic_auth/NCSA/basic_ncsa_auth.8
  helpers/basic_auth/NCSA/basic_ncsa_auth.cc

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=== modified file 'helpers/basic_auth/NCSA/basic_ncsa_auth.8'
--- a/helpers/basic_auth/NCSA/basic_ncsa_auth.8	2012-02-06 05:46:00 +0000
+++ b/helpers/basic_auth/NCSA/basic_ncsa_auth.8	2013-04-17 11:58:23 +0000
@@ -20,10 +20,18 @@
 .PP
 This authenticator accepts:
 .BR
+* Blowfish - for passwords 72 characters or less in length
+.BR
+* SHA256 - with salting and magic strings
+.BR
+* SHA512 - with salting and magic strings
+.BR
 * MD5 - with optional salt and magic strings
 .BR
 * DES - for passwords 8 characters or less in length
 .
+NOTE: Blowfish and SHA algorithms require system-specific support.
+.
 .SH OPTIONS
 The only parameter is the password file.
 It must have permissions to be read by the user that Squid is running as.

=== modified file 'helpers/basic_auth/NCSA/basic_ncsa_auth.cc'
--- a/helpers/basic_auth/NCSA/basic_ncsa_auth.cc	2013-04-16 00:26:10 +0000
+++ b/helpers/basic_auth/NCSA/basic_ncsa_auth.cc	2013-04-17 11:58:23 +0000
@@ -144,24 +144,41 @@
         rfc1738_unescape(user);
         rfc1738_unescape(passwd);
         u = (user_data *) hash_lookup(hash, user);
-        char *crypted = NULL;
         if (u == NULL) {
             SEND_ERR("No such user");
+            continue;
+        }
+        char *crypted = NULL;
+        size_t passwordLength = strlen(passwd);
 #if HAVE_CRYPT
-        } else if (strlen(passwd) <= 8 && (crypted = crypt(passwd, u->passwd)) && \
                (strcmp(u->passwd, crypted) == 0)) {
-            // Bug 3107: crypt() DES functionality silently truncates long \
                passwords.
-            SEND_OK("");
-        } else if (strlen(passwd) > 8 && (crypted = crypt(passwd, u->passwd)) && \
(strcmp(u->passwd, crypted) == 0)) { +        // Bug 3831: given algorithms more \
secure than DES crypt() does not truncate, so we can ignore the bug 3107 length \
checks below +        // '$1$' = MD5, '$2a$' = Blowfish, '$5$' = SHA256 (Linux), \
'$6$' = SHA256 (BSD) and SHA512 +        if (passwordLength > 1 && u->passwd[0] == \
'$' && +            (crypted = crypt(passwd, u->passwd)) && strcmp(u->passwd, \
crypted) == 0) { +            SEND_OK("");
+            continue;
+        }
+        // 'other' prefixes indicate DES algorithm.
+        if (passwordLength <= 8 && (crypted = crypt(passwd, u->passwd)) && \
(strcmp(u->passwd, crypted) == 0)) { +            SEND_OK("");
+            continue;
+        }
+        if (passwordLength > 8 && (crypted = crypt(passwd, u->passwd)) && \
                (strcmp(u->passwd, crypted) == 0)) {
             // Bug 3107: crypt() DES functionality silently truncates long \
passwords.  SEND_ERR("Password too long. Only 8 characters accepted.");
+            continue;
+        }
+
 #endif
-        } else if ( (crypted = crypt_md5(passwd, u->passwd)) && strcmp(u->passwd, \
                crypted) == 0) {
-            SEND_OK("");
-        } else if ( (crypted =  md5sum(passwd)) && strcmp(u->passwd, crypted) == 0) \
                {
-            SEND_OK("");
-        } else {
-            SEND_ERR("Wrong password");
-        }
+        if ( (crypted = crypt_md5(passwd, u->passwd)) && strcmp(u->passwd, crypted) \
== 0) { +            SEND_OK("");
+            continue;
+        }
+        if ( (crypted = md5sum(passwd)) && strcmp(u->passwd, crypted) == 0) {
+            SEND_OK("");
+            continue;
+        }
+        SEND_ERR("Wrong password");
     }
     if (hash != NULL) {
         hashFreeItems(hash, my_free);


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