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2024-01-05 071106ecf68c401173c58808b1cf5f68cc50d390

 kernel/arch/x86/crypto/des3_ede_glue.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * Glue Code for assembler optimized version of 3DES
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  *
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@@ -7,17 +8,6 @@
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  *   Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
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  * CTR part based on code (crypto/ctr.c) by:
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  *   (C) Copyright IBM Corp. 2007 - Joy Latten <latten@us.ibm.com>
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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  */
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12
 
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 #include <crypto/algapi.h>
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@@ -29,8 +19,8 @@
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 #include <linux/types.h>
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 struct des3_ede_x86_ctx {
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-	u32 enc_expkey[DES3_EDE_EXPKEY_WORDS];
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-	u32 dec_expkey[DES3_EDE_EXPKEY_WORDS];
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+	struct des3_ede_ctx enc;
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+	struct des3_ede_ctx dec;
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 };
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 /* regular block cipher functions */
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@@ -44,7 +34,7 @@
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 static inline void des3_ede_enc_blk(struct des3_ede_x86_ctx *ctx, u8 *dst,
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 				    const u8 *src)
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 {
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-	u32 *enc_ctx = ctx->enc_expkey;
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+	u32 *enc_ctx = ctx->enc.expkey;
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 	des3_ede_x86_64_crypt_blk(enc_ctx, dst, src);
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 }
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@@ -52,7 +42,7 @@
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 static inline void des3_ede_dec_blk(struct des3_ede_x86_ctx *ctx, u8 *dst,
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 				    const u8 *src)
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 {
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-	u32 *dec_ctx = ctx->dec_expkey;
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+	u32 *dec_ctx = ctx->dec.expkey;
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 	des3_ede_x86_64_crypt_blk(dec_ctx, dst, src);
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 }
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@@ -60,7 +50,7 @@
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 static inline void des3_ede_enc_blk_3way(struct des3_ede_x86_ctx *ctx, u8 *dst,
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 					 const u8 *src)
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 {
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-	u32 *enc_ctx = ctx->enc_expkey;
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+	u32 *enc_ctx = ctx->enc.expkey;
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 	des3_ede_x86_64_crypt_blk_3way(enc_ctx, dst, src);
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 }
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@@ -68,7 +58,7 @@
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 static inline void des3_ede_dec_blk_3way(struct des3_ede_x86_ctx *ctx, u8 *dst,
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 					 const u8 *src)
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 {
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-	u32 *dec_ctx = ctx->dec_expkey;
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+	u32 *dec_ctx = ctx->dec.expkey;
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 	des3_ede_x86_64_crypt_blk_3way(dec_ctx, dst, src);
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 }
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@@ -132,7 +122,7 @@
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 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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 	struct des3_ede_x86_ctx *ctx = crypto_skcipher_ctx(tfm);
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-	return ecb_crypt(req, ctx->enc_expkey);
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+	return ecb_crypt(req, ctx->enc.expkey);
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 }
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 static int ecb_decrypt(struct skcipher_request *req)
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@@ -140,7 +130,7 @@
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 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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 	struct des3_ede_x86_ctx *ctx = crypto_skcipher_ctx(tfm);
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-	return ecb_crypt(req, ctx->dec_expkey);
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+	return ecb_crypt(req, ctx->dec.expkey);
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 }
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 static unsigned int __cbc_encrypt(struct des3_ede_x86_ctx *ctx,
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@@ -358,20 +348,28 @@
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 	u32 i, j, tmp;
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 	int err;
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-	/* Generate encryption context using generic implementation. */
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-	err = __des3_ede_setkey(ctx->enc_expkey, &tfm->crt_flags, key, keylen);
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-	if (err < 0)
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+	err = des3_ede_expand_key(&ctx->enc, key, keylen);
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+	if (err == -ENOKEY) {
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+		if (crypto_tfm_get_flags(tfm) & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS)
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+			err = -EINVAL;
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+		else
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+			err = 0;
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+	}
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+
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+	if (err) {
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+		memset(ctx, 0, sizeof(*ctx));
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 		return err;
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+	}
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 	/* Fix encryption context for this implementation and form decryption
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 	 * context. */
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 	j = DES3_EDE_EXPKEY_WORDS - 2;
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 	for (i = 0; i < DES3_EDE_EXPKEY_WORDS; i += 2, j -= 2) {
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-		tmp = ror32(ctx->enc_expkey[i + 1], 4);
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-		ctx->enc_expkey[i + 1] = tmp;
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+		tmp = ror32(ctx->enc.expkey[i + 1], 4);
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+		ctx->enc.expkey[i + 1] = tmp;
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-		ctx->dec_expkey[j + 0] = ctx->enc_expkey[i + 0];
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-		ctx->dec_expkey[j + 1] = tmp;
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+		ctx->dec.expkey[j + 0] = ctx->enc.expkey[i + 0];
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+		ctx->dec.expkey[j + 1] = tmp;
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 	}
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 	return 0;