Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / ipxe / src / crypto / axtls_aes.c

diff --git a/qemu/roms/ipxe/src/crypto/axtls_aes.c b/qemu/roms/ipxe/src/crypto/axtls_aes.c
new file mode 100644 (file)
index 0000000..7f93c0e
--- /dev/null
+++ b/qemu/roms/ipxe/src/crypto/axtls_aes.c
@@ -0,0 +1,160 @@
+/*
+ * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <string.h>
+#include <errno.h>
+#include <assert.h>
+#include <byteswap.h>
+#include <ipxe/crypto.h>
+#include <ipxe/cbc.h>
+#include <ipxe/aes.h>
+#include "crypto/axtls/crypto.h"
+
+/** @file
+ *
+ * AES algorithm
+ *
+ */
+
+/**
+ * Set key
+ *
+ * @v ctx              Context
+ * @v key              Key
+ * @v keylen           Key length
+ * @ret rc             Return status code
+ */
+static int aes_setkey ( void *ctx, const void *key, size_t keylen ) {
+       struct aes_context *aes_ctx = ctx;
+       AES_MODE mode;
+       void *iv;
+
+       switch ( keylen ) {
+       case ( 128 / 8 ):
+               mode = AES_MODE_128;
+               break;
+       case ( 256 / 8 ):
+               mode = AES_MODE_256;
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       /* IV is not a relevant concept at this stage; use a dummy
+        * value that will have no side-effects.
+        */
+       iv = &aes_ctx->axtls_ctx.iv;
+
+       AES_set_key ( &aes_ctx->axtls_ctx, key, iv, mode );
+
+       aes_ctx->decrypting = 0;
+
+       return 0;
+}
+
+/**
+ * Set initialisation vector
+ *
+ * @v ctx              Context
+ * @v iv               Initialisation vector
+ */
+static void aes_setiv ( void *ctx __unused, const void *iv __unused ) {
+       /* Nothing to do */
+}
+
+/**
+ * Call AXTLS' AES_encrypt() or AES_decrypt() functions
+ *
+ * @v axtls_ctx                AXTLS AES context
+ * @v src              Data to process
+ * @v dst              Buffer for output
+ * @v func             AXTLS AES function to call
+ */
+static void aes_call_axtls ( AES_CTX *axtls_ctx, const void *src, void *dst,
+                            void ( * func ) ( const AES_CTX *axtls_ctx,
+                                              uint32_t *data ) ){
+       const uint32_t *srcl = src;
+       uint32_t *dstl = dst;
+       unsigned int i;
+
+       /* AXTLS' AES_encrypt() and AES_decrypt() functions both
+        * expect to deal with an array of four dwords in host-endian
+        * order.
+        */
+       for ( i = 0 ; i < 4 ; i++ )
+               dstl[i] = ntohl ( srcl[i] );
+       func ( axtls_ctx, dstl );
+       for ( i = 0 ; i < 4 ; i++ )
+               dstl[i] = htonl ( dstl[i] );
+}
+
+/**
+ * Encrypt data
+ *
+ * @v ctx              Context
+ * @v src              Data to encrypt
+ * @v dst              Buffer for encrypted data
+ * @v len              Length of data
+ */
+static void aes_encrypt ( void *ctx, const void *src, void *dst,
+                         size_t len ) {
+       struct aes_context *aes_ctx = ctx;
+
+       assert ( len == AES_BLOCKSIZE );
+       if ( aes_ctx->decrypting )
+               assert ( 0 );
+       aes_call_axtls ( &aes_ctx->axtls_ctx, src, dst, axtls_aes_encrypt );
+}
+
+/**
+ * Decrypt data
+ *
+ * @v ctx              Context
+ * @v src              Data to decrypt
+ * @v dst              Buffer for decrypted data
+ * @v len              Length of data
+ */
+static void aes_decrypt ( void *ctx, const void *src, void *dst,
+                         size_t len ) {
+       struct aes_context *aes_ctx = ctx;
+
+       assert ( len == AES_BLOCKSIZE );
+       if ( ! aes_ctx->decrypting ) {
+               AES_convert_key ( &aes_ctx->axtls_ctx );
+               aes_ctx->decrypting = 1;
+       }
+       aes_call_axtls ( &aes_ctx->axtls_ctx, src, dst, axtls_aes_decrypt );
+}
+
+/** Basic AES algorithm */
+struct cipher_algorithm aes_algorithm = {
+       .name = "aes",
+       .ctxsize = sizeof ( struct aes_context ),
+       .blocksize = AES_BLOCKSIZE,
+       .setkey = aes_setkey,
+       .setiv = aes_setiv,
+       .encrypt = aes_encrypt,
+       .decrypt = aes_decrypt,
+};
+
+/* AES with cipher-block chaining */
+CBC_CIPHER ( aes_cbc, aes_cbc_algorithm,
+            aes_algorithm, struct aes_context, AES_BLOCKSIZE );