Go over all OpenSSL return values and make sure we compare them

to the documented API value. The previous code got it right as
it's implemented, but accepted too much/too little compared to
the API documentation.

Per comment from Zdenek Kotala.

src/backend/libpq/be-secure.c

@@ -11,7 +11,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/libpq/be-secure.c,v 1.89 2009/01/01 17:23:42 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/libpq/be-secure.c,v 1.90 2009/01/28 15:06:47 mha Exp $
  *
  *	  Since the server static private key ($DataDir/server.key)
  *	  will normally be stored unencrypted so that the database
@@ -729,9 +729,9 @@ initialize_SSL(void)
 		/*
 		 * Load and verify certificate and private key
 		 */
-		if (!SSL_CTX_use_certificate_file(SSL_context,
+		if (SSL_CTX_use_certificate_file(SSL_context,
 										  SERVER_CERT_FILE,
-										  SSL_FILETYPE_PEM))
+										  SSL_FILETYPE_PEM) != 1)
 			ereport(FATAL,
 					(errcode(ERRCODE_CONFIG_FILE_ERROR),
 				  errmsg("could not load server certificate file \"%s\": %s",
@@ -760,14 +760,14 @@ initialize_SSL(void)
 					 errdetail("Permissions should be u=rw (0600) or less.")));
 #endif
 
-		if (!SSL_CTX_use_PrivateKey_file(SSL_context,
+		if (SSL_CTX_use_PrivateKey_file(SSL_context,
 										 SERVER_PRIVATE_KEY_FILE,
-										 SSL_FILETYPE_PEM))
+										 SSL_FILETYPE_PEM) != 1)
 			ereport(FATAL,
 					(errmsg("could not load private key file \"%s\": %s",
 							SERVER_PRIVATE_KEY_FILE, SSLerrmessage())));
 
-		if (!SSL_CTX_check_private_key(SSL_context))
+		if (SSL_CTX_check_private_key(SSL_context) != 1)
 			ereport(FATAL,
 					(errmsg("check of private key failed: %s",
 							SSLerrmessage())));
@@ -800,7 +800,7 @@ initialize_SSL(void)
 							ROOT_CERT_FILE)));
 		}
 	}
-	else if (!SSL_CTX_load_verify_locations(SSL_context, ROOT_CERT_FILE, NULL))
+	else if (SSL_CTX_load_verify_locations(SSL_context, ROOT_CERT_FILE, NULL) != 1)
 	{
 		/*
 		 * File was there, but we could not load it. This means the file is somehow
@@ -823,7 +823,7 @@ initialize_SSL(void)
 		if (cvstore)
 		{
 			/* Set the flags to check against the complete CRL chain */
-			if (X509_STORE_load_locations(cvstore, ROOT_CRL_FILE, NULL) != 0)
+			if (X509_STORE_load_locations(cvstore, ROOT_CRL_FILE, NULL) == 1)
 /* OpenSSL 0.96 does not support X509_V_FLAG_CRL_CHECK */
 #ifdef X509_V_FLAG_CRL_CHECK
 				X509_STORE_set_flags(cvstore,

src/interfaces/libpq/fe-secure.c

@@ -11,7 +11,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/interfaces/libpq/fe-secure.c,v 1.118 2009/01/19 17:17:50 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/interfaces/libpq/fe-secure.c,v 1.119 2009/01/28 15:06:47 mha Exp $
  *
  * NOTES
  *
@@ -757,7 +757,7 @@ client_cert_cb(SSL *ssl, X509 **x509, EVP_PKEY **pkey)
 	}
 
 	/* verify that the cert and key go together */
-	if (!X509_check_private_key(*x509, *pkey))
+	if (X509_check_private_key(*x509, *pkey) != 1)
 	{
 		char	   *err = SSLerrmessage();
 
@@ -1004,7 +1004,7 @@ initialize_SSL(PGconn *conn)
 	{
 		X509_STORE *cvstore;
 
-		if (!SSL_CTX_load_verify_locations(SSL_context, fnbuf, NULL))
+		if (SSL_CTX_load_verify_locations(SSL_context, fnbuf, NULL) != 1)
 		{
 			char	   *err = SSLerrmessage();
 
@@ -1023,7 +1023,7 @@ initialize_SSL(PGconn *conn)
 				snprintf(fnbuf, sizeof(fnbuf), "%s/%s", homedir, ROOT_CRL_FILE);
 
 			/* setting the flags to check against the complete CRL chain */
-			if (X509_STORE_load_locations(cvstore, fnbuf, NULL) != 0)
+			if (X509_STORE_load_locations(cvstore, fnbuf, NULL) == 1)
 /* OpenSSL 0.96 does not support X509_V_FLAG_CRL_CHECK */
 #ifdef X509_V_FLAG_CRL_CHECK
 				X509_STORE_set_flags(cvstore,