Ask for SSL key password when started with -N but without sslpassword_program.

Do not give SSL a password-asking callback if sslpassword_program is not
configured. Without a callback, OpenSSL itself asks for the password (which
works if Squid runs in foreground because of -N).

The fix applies to Ssl::readCertChainAndPrivateKeyFromFiles() context only.
This is not the only place where we read private keys. Some other places are
working correctly, but others may need more work. Also,
Ssl::readCertChainAndPrivateKeyFromFiles() may not really work if
sslpassword_program _is_ configured because "user data" pointer will be nil.

diff --git a/src/ssl/support.cc b/src/ssl/support.cc
index 51f955e077b146b0abd763a67cd22249976f543e..405cabd541212b8991af28f82e18a62941a66871 100644 (file)
--- a/src/ssl/support.cc
+++ b/src/ssl/support.cc
@@ -1562,7 +1562,10 @@ void Ssl::readCertChainAndPrivateKeyFromFiles(X509_Pointer & cert, EVP_PKEY_Poin
         chain.reset(sk_X509_new_null());
     if (!chain)
         debugs(83, DBG_IMPORTANT, "WARNING: unable to allocate memory for cert chain");
-    pkey.reset(readSslPrivateKey(keyFilename, ssl_ask_password_cb));
+    // XXX: ssl_ask_password_cb needs SSL_CTX_set_default_passwd_cb_userdata()
+    // so this may not fully work iff Config.Program.ssl_password is set.
+    pem_password_cb *cb = ::Config.Program.ssl_password ? &ssl_ask_password_cb : NULL;
+    pkey.reset(readSslPrivateKey(keyFilename, cb));
     cert.reset(readSslX509CertificatesChain(certFilename, chain.get()));
     if (!pkey || !cert || !X509_check_private_key(cert.get(), pkey.get())) {
         pkey.reset(NULL);