1 files changed, 0 insertions, 131 deletions
diff --git a/gpxe/src/crypto/arc4.c b/gpxe/src/crypto/arc4.c
deleted file mode 100644
index e58fba7c..00000000
--- a/gpxe/src/crypto/arc4.c
+++ /dev/null
@@ -1,131 +0,0 @@
-/*
- * The ARC4 stream cipher.
- *
- * Copyright (c) 2009 Joshua Oreman <oremanj@rwcr.net>.
- *
- * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-FILE_LICENCE ( GPL2_OR_LATER );
-
-#include <gpxe/crypto.h>
-#include <gpxe/arc4.h>
-
-#define SWAP( ary, i, j )	\
-	({ u8 temp = ary[i]; ary[i] = ary[j]; ary[j] = temp; })
-
-/**
- * Set ARC4 key
- *
- * @v ctxv	ARC4 encryption context
- * @v keyv	Key to set
- * @v keylen	Length of key
- *
- * If an initialisation vector is to be used, it should be prepended
- * to the key; ARC4 does not implement the @c setiv function because
- * there is no standard length for an initialisation vector in the
- * cipher.
- */
-static int arc4_setkey ( void *ctxv, const void *keyv, size_t keylen )
-{
-	struct arc4_ctx *ctx = ctxv;
-	const u8 *key = keyv;
-	u8 *S = ctx->state;
-	int i, j;
-
-	for ( i = 0; i < 256; i++ ) {
-		S[i] = i;
-	}
-
-	for ( i = j = 0; i < 256; i++ ) {
-		j = ( j + S[i] + key[i % keylen] ) & 0xff;
-		SWAP ( S, i, j );
-	}
-
-	ctx->i = ctx->j = 0;
-	return 0;
-}
-
-/**
- * Perform ARC4 encryption or decryption
- *
- * @v ctxv	ARC4 encryption context
- * @v srcv	Data to encrypt or decrypt
- * @v dstv	Location to store encrypted or decrypted data
- * @v len	Length of data to operate on
- *
- * ARC4 is a stream cipher that works by generating a stream of PRNG
- * data based on the key, and XOR'ing it with the data to be
- * encrypted. Since XOR is symmetric, encryption and decryption in
- * ARC4 are the same operation.
- *
- * If you pass a @c NULL source or destination pointer, @a len
- * keystream bytes will be consumed without encrypting any data.
- */
-static void arc4_xor ( void *ctxv, const void *srcv, void *dstv,
-		       size_t len )
-{
-	struct arc4_ctx *ctx = ctxv;
-	const u8 *src = srcv;
-	u8 *dst = dstv;
-	u8 *S = ctx->state;
-	int i = ctx->i, j = ctx->j;
-
-	while ( len-- ) {
-		i = ( i + 1 ) & 0xff;
-		j = ( j + S[i] ) & 0xff;
-		SWAP ( S, i, j );
-		if ( srcv && dstv )
-			*dst++ = *src++ ^ S[(S[i] + S[j]) & 0xff];
-	}
-
-	ctx->i = i;
-	ctx->j = j;
-}
-
-static void arc4_setiv ( void *ctx __unused, const void *iv __unused )
-{
-	/* ARC4 does not use a fixed-length IV */
-}
-
-
-/**
- * Perform ARC4 encryption or decryption, skipping initial keystream bytes
- *
- * @v key	ARC4 encryption key
- * @v keylen	Key length
- * @v skip	Number of bytes of keystream to skip
- * @v src	Message to encrypt or decrypt
- * @v msglen	Length of message
- * @ret dst	Encrypted or decrypted message
- */
-void arc4_skip ( const void *key, size_t keylen, size_t skip,
-		 const void *src, void *dst, size_t msglen )
-{
-	struct arc4_ctx ctx;
-	arc4_setkey ( &ctx, key, keylen );
-	arc4_xor ( &ctx, NULL, NULL, skip );
-	arc4_xor ( &ctx, src, dst, msglen );
-}
-
-struct cipher_algorithm arc4_algorithm = {
-	.name = "ARC4",
-	.ctxsize = ARC4_CTX_SIZE,
-	.blocksize = 1,
-	.setkey = arc4_setkey,
-	.setiv = arc4_setiv,
-	.encrypt = arc4_xor,
-	.decrypt = arc4_xor,
-};