--- /dev/null
+/** @file
+ SSL/TLS Initialization Library Wrapper Implementation over OpenSSL.
+
+Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+(C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
+This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution. The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "InternalTlsLib.h"
+
+/**
+ Initializes the OpenSSL library.
+
+ This function registers ciphers and digests used directly and indirectly
+ by SSL/TLS, and initializes the readable error messages.
+ This function must be called before any other action takes places.
+
+**/
+VOID
+EFIAPI
+TlsInitialize (
+ VOID
+ )
+{
+ //
+ // Performs initialization of crypto and ssl library, and loads required
+ // algorithms.
+ //
+ SSL_library_init ();
+
+ //
+ // Loads error strings from both crypto and ssl library.
+ //
+ SSL_load_error_strings ();
+
+ /// OpenSSL_add_all_algorithms();
+
+ //
+ // Initialize the pseudorandom number generator.
+ //
+ RandomSeed (NULL, 0);
+}
+
+/**
+ Free an allocated SSL_CTX object.
+
+ @param[in] TlsCtx Pointer to the SSL_CTX object to be released.
+
+**/
+VOID
+EFIAPI
+TlsCtxFree (
+ IN VOID *TlsCtx
+ )
+{
+ if (TlsCtx == NULL) {
+ return;
+ }
+
+ if (TlsCtx != NULL) {
+ SSL_CTX_free ((SSL_CTX *) (TlsCtx));
+ }
+}
+
+/**
+ Creates a new SSL_CTX object as framework to establish TLS/SSL enabled
+ connections.
+
+ @param[in] MajorVer Major Version of TLS/SSL Protocol.
+ @param[in] MinorVer Minor Version of TLS/SSL Protocol.
+
+ @return Pointer to an allocated SSL_CTX object.
+ If the creation failed, TlsCtxNew() returns NULL.
+
+**/
+VOID *
+EFIAPI
+TlsCtxNew (
+ IN UINT8 MajorVer,
+ IN UINT8 MinorVer
+ )
+{
+ SSL_CTX *TlsCtx;
+ UINT16 ProtoVersion;
+
+ ProtoVersion = (MajorVer << 8) | MinorVer;
+
+ TlsCtx = SSL_CTX_new (SSLv23_client_method ());
+ if (TlsCtx == NULL) {
+ return NULL;
+ }
+
+ //
+ // Ensure SSLv3 is disabled
+ //
+ SSL_CTX_set_options (TlsCtx, SSL_OP_NO_SSLv3);
+
+ //
+ // Treat as minimum accepted versions. Client can use higher
+ // TLS version if server supports it
+ //
+ switch (ProtoVersion) {
+ case TLS1_VERSION:
+ //
+ // TLS 1.0
+ //
+ break;
+ case TLS1_1_VERSION:
+ //
+ // TLS 1.1
+ //
+ SSL_CTX_set_options (TlsCtx, SSL_OP_NO_TLSv1);
+ break;
+ case TLS1_2_VERSION:
+ //
+ // TLS 1.2
+ //
+ SSL_CTX_set_options (TlsCtx, SSL_OP_NO_TLSv1);
+ SSL_CTX_set_options (TlsCtx, SSL_OP_NO_TLSv1_1);
+ break;
+ default:
+ //
+ // Unsupported TLS/SSL Protocol Version.
+ //
+ break;
+ }
+
+ return (VOID *) TlsCtx;
+}
+
+/**
+ Free an allocated TLS object.
+
+ This function removes the TLS object pointed to by Tls and frees up the
+ allocated memory. If Tls is NULL, nothing is done.
+
+ @param[in] Tls Pointer to the TLS object to be freed.
+
+**/
+VOID
+EFIAPI
+TlsFree (
+ IN VOID *Tls
+ )
+{
+ TLS_CONNECTION *TlsConn;
+
+ TlsConn = (TLS_CONNECTION *) Tls;
+ if (TlsConn == NULL) {
+ return;
+ }
+
+ //
+ // Free the internal TLS and BIO objects.
+ //
+ if (TlsConn->Ssl != NULL) {
+ SSL_free (TlsConn->Ssl);
+ }
+
+ if (TlsConn->InBio != NULL) {
+ BIO_free (TlsConn->InBio);
+ }
+
+ if (TlsConn->OutBio != NULL) {
+ BIO_free (TlsConn->OutBio);
+ }
+
+ OPENSSL_free (Tls);
+}
+
+/**
+ Create a new TLS object for a connection.
+
+ This function creates a new TLS object for a connection. The new object
+ inherits the setting of the underlying context TlsCtx: connection method,
+ options, verification setting.
+
+ @param[in] TlsCtx Pointer to the SSL_CTX object.
+
+ @return Pointer to an allocated SSL object.
+ If the creation failed, TlsNew() returns NULL.
+
+**/
+VOID *
+EFIAPI
+TlsNew (
+ IN VOID *TlsCtx
+ )
+{
+ TLS_CONNECTION *TlsConn;
+ SSL_CTX *SslCtx;
+ X509_STORE *X509Store;
+
+ TlsConn = NULL;
+
+ //
+ // Allocate one new TLS_CONNECTION object
+ //
+ TlsConn = (TLS_CONNECTION *) OPENSSL_malloc (sizeof (TLS_CONNECTION));
+ if (TlsConn == NULL) {
+ return NULL;
+ }
+
+ TlsConn->Ssl = NULL;
+
+ //
+ // Create a new SSL Object
+ //
+ TlsConn->Ssl = SSL_new ((SSL_CTX *) TlsCtx);
+ if (TlsConn->Ssl == NULL) {
+ TlsFree ((VOID *) TlsConn);
+ return NULL;
+ }
+
+ //
+ // Initialize the created SSL Object
+ //
+ SSL_set_info_callback (TlsConn->Ssl, NULL);
+
+ TlsConn->InBio = NULL;
+
+ //
+ // Set up Reading BIO for TLS connection
+ //
+ TlsConn->InBio = BIO_new (BIO_s_mem ());
+ if (TlsConn->InBio == NULL) {
+ TlsFree ((VOID *) TlsConn);
+ return NULL;
+ }
+
+ //
+ // Sets the behaviour of memory BIO when it is empty. It will set the
+ // read retry flag.
+ //
+ BIO_set_mem_eof_return (TlsConn->InBio, -1);
+
+ TlsConn->OutBio = NULL;
+
+ //
+ // Set up Writing BIO for TLS connection
+ //
+ TlsConn->OutBio = BIO_new (BIO_s_mem ());
+ if (TlsConn->OutBio == NULL) {
+ TlsFree ((VOID *) TlsConn);
+ return NULL;
+ }
+
+ //
+ // Sets the behaviour of memory BIO when it is empty. It will set the
+ // write retry flag.
+ //
+ BIO_set_mem_eof_return (TlsConn->OutBio, -1);
+
+ ASSERT (TlsConn->Ssl != NULL && TlsConn->InBio != NULL && TlsConn->OutBio != NULL);
+
+ //
+ // Connects the InBio and OutBio for the read and write operations.
+ //
+ SSL_set_bio (TlsConn->Ssl, TlsConn->InBio, TlsConn->OutBio);
+
+ //
+ // Create new X509 store if needed
+ //
+ SslCtx = SSL_get_SSL_CTX (TlsConn->Ssl);
+ X509Store = SSL_CTX_get_cert_store (SslCtx);
+ if (X509Store == NULL) {
+ X509Store = X509_STORE_new ();
+ if (X509Store == NULL) {
+ TlsFree ((VOID *) TlsConn);
+ return NULL;
+ }
+ SSL_CTX_set1_verify_cert_store (SslCtx, X509Store);
+ X509_STORE_free (X509Store);
+ }
+
+ //
+ // Set X509_STORE flags used in certificate validation
+ //
+ X509_STORE_set_flags (
+ X509Store,
+ X509_V_FLAG_PARTIAL_CHAIN | X509_V_FLAG_NO_CHECK_TIME
+ );
+ return (VOID *) TlsConn;
+}
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