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authorEric Biggers <ebiggers@google.com>2020-05-02 11:24:27 -0700
committerHerbert Xu <herbert@gondor.apana.org.au>2020-05-08 15:32:17 +1000
commit228c4f265c6eb60eaa4ed0edb3bf7c113173576c (patch)
treeaf8e07c49d95c2a4fe460d1ec59c3c215a314cd7
parent2aaba014b55be46affcae78edff356c5e3389081 (diff)
downloadlinux-228c4f265c6eb60eaa4ed0edb3bf7c113173576c.tar.bz2
crypto: lib/sha1 - fold linux/cryptohash.h into crypto/sha.h
<linux/cryptohash.h> sounds very generic and important, like it's the header to include if you're doing cryptographic hashing in the kernel. But actually it only includes the library implementation of the SHA-1 compression function (not even the full SHA-1). This should basically never be used anymore; SHA-1 is no longer considered secure, and there are much better ways to do cryptographic hashing in the kernel. Remove this header and fold it into <crypto/sha.h> which already contains constants and functions for SHA-1 (along with SHA-2). Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
-rw-r--r--crypto/sha1_generic.c1
-rw-r--r--drivers/char/random.c2
-rw-r--r--include/crypto/sha.h10
-rw-r--r--include/linux/cryptohash.h18
-rw-r--r--include/linux/filter.h2
-rw-r--r--lib/sha1.c2
6 files changed, 13 insertions, 22 deletions
diff --git a/crypto/sha1_generic.c b/crypto/sha1_generic.c
index a16d9787dcd2..1d43472fecbd 100644
--- a/crypto/sha1_generic.c
+++ b/crypto/sha1_generic.c
@@ -15,7 +15,6 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
-#include <linux/cryptohash.h>
#include <linux/types.h>
#include <crypto/sha.h>
#include <crypto/sha1_base.h>
diff --git a/drivers/char/random.c b/drivers/char/random.c
index a19a8984741b..cae02b2a871c 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -327,7 +327,6 @@
#include <linux/spinlock.h>
#include <linux/kthread.h>
#include <linux/percpu.h>
-#include <linux/cryptohash.h>
#include <linux/fips.h>
#include <linux/ptrace.h>
#include <linux/workqueue.h>
@@ -337,6 +336,7 @@
#include <linux/completion.h>
#include <linux/uuid.h>
#include <crypto/chacha.h>
+#include <crypto/sha.h>
#include <asm/processor.h>
#include <linux/uaccess.h>
diff --git a/include/crypto/sha.h b/include/crypto/sha.h
index 67aec7245cb7..10753ff71d46 100644
--- a/include/crypto/sha.h
+++ b/include/crypto/sha.h
@@ -114,6 +114,16 @@ extern int crypto_sha512_finup(struct shash_desc *desc, const u8 *data,
unsigned int len, u8 *hash);
/*
+ * An implementation of SHA-1's compression function. Don't use in new code!
+ * You shouldn't be using SHA-1, and even if you *have* to use SHA-1, this isn't
+ * the correct way to hash something with SHA-1 (use crypto_shash instead).
+ */
+#define SHA1_DIGEST_WORDS (SHA1_DIGEST_SIZE / 4)
+#define SHA1_WORKSPACE_WORDS 16
+void sha1_init(__u32 *buf);
+void sha1_transform(__u32 *digest, const char *data, __u32 *W);
+
+/*
* Stand-alone implementation of the SHA256 algorithm. It is designed to
* have as little dependencies as possible so it can be used in the
* kexec_file purgatory. In other cases you should generally use the
diff --git a/include/linux/cryptohash.h b/include/linux/cryptohash.h
deleted file mode 100644
index c324ffca96e0..000000000000
--- a/include/linux/cryptohash.h
+++ /dev/null
@@ -1,18 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __CRYPTOHASH_H
-#define __CRYPTOHASH_H
-
-#include <uapi/linux/types.h>
-
-/*
- * An implementation of SHA-1's compression function. Don't use in new code!
- * You shouldn't be using SHA-1, and even if you *have* to use SHA-1, this isn't
- * the correct way to hash something with SHA-1 (use crypto_shash instead).
- */
-#define SHA1_DIGEST_WORDS 5
-#define SHA1_BLOCK_SIZE 64
-#define SHA1_WORKSPACE_WORDS 16
-void sha1_init(__u32 *buf);
-void sha1_transform(__u32 *digest, const char *data, __u32 *W);
-
-#endif
diff --git a/include/linux/filter.h b/include/linux/filter.h
index f42662adffe4..ec45fd7992c9 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -16,11 +16,11 @@
#include <linux/workqueue.h>
#include <linux/sched.h>
#include <linux/capability.h>
-#include <linux/cryptohash.h>
#include <linux/set_memory.h>
#include <linux/kallsyms.h>
#include <linux/if_vlan.h>
#include <linux/vmalloc.h>
+#include <crypto/sha.h>
#include <net/sch_generic.h>
diff --git a/lib/sha1.c b/lib/sha1.c
index b381e8cd4fe4..49257a915bb6 100644
--- a/lib/sha1.c
+++ b/lib/sha1.c
@@ -9,7 +9,7 @@
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/bitops.h>
-#include <linux/cryptohash.h>
+#include <crypto/sha.h>
#include <asm/unaligned.h>
/*