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authorEric Biggers <ebiggers@google.com>2020-11-12 21:20:21 -0800
committerHerbert Xu <herbert@gondor.apana.org.au>2020-11-20 14:45:33 +1100
commita24d22b225ce158651378869a6b88105c4bdb887 (patch)
tree810994e166c5472a341136b3140ac9a2ae56440c /include/crypto
parent5bdad829c31a09069fd508534f03c2ea1576ac75 (diff)
downloadlinux-a24d22b225ce158651378869a6b88105c4bdb887.tar.bz2
crypto: sha - split sha.h into sha1.h and sha2.h
Currently <crypto/sha.h> contains declarations for both SHA-1 and SHA-2, and <crypto/sha3.h> contains declarations for SHA-3. This organization is inconsistent, but more importantly SHA-1 is no longer considered to be cryptographically secure. So to the extent possible, SHA-1 shouldn't be grouped together with any of the other SHA versions, and usage of it should be phased out. Therefore, split <crypto/sha.h> into two headers <crypto/sha1.h> and <crypto/sha2.h>, and make everyone explicitly specify whether they want the declarations for SHA-1, SHA-2, or both. This avoids making the SHA-1 declarations visible to files that don't want anything to do with SHA-1. It also prepares for potentially moving sha1.h into a new insecure/ or dangerous/ directory. Signed-off-by: Eric Biggers <ebiggers@google.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> Acked-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/crypto')
-rw-r--r--include/crypto/hash_info.h3
-rw-r--r--include/crypto/sha1.h46
-rw-r--r--include/crypto/sha1_base.h2
-rw-r--r--include/crypto/sha2.h (renamed from include/crypto/sha.h)41
-rw-r--r--include/crypto/sha256_base.h2
-rw-r--r--include/crypto/sha512_base.h2
6 files changed, 55 insertions, 41 deletions
diff --git a/include/crypto/hash_info.h b/include/crypto/hash_info.h
index eb9d2e368969..dd4f06785049 100644
--- a/include/crypto/hash_info.h
+++ b/include/crypto/hash_info.h
@@ -8,7 +8,8 @@
#ifndef _CRYPTO_HASH_INFO_H
#define _CRYPTO_HASH_INFO_H
-#include <crypto/sha.h>
+#include <crypto/sha1.h>
+#include <crypto/sha2.h>
#include <crypto/md5.h>
#include <crypto/streebog.h>
diff --git a/include/crypto/sha1.h b/include/crypto/sha1.h
new file mode 100644
index 000000000000..044ecea60ac8
--- /dev/null
+++ b/include/crypto/sha1.h
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Common values for SHA-1 algorithms
+ */
+
+#ifndef _CRYPTO_SHA1_H
+#define _CRYPTO_SHA1_H
+
+#include <linux/types.h>
+
+#define SHA1_DIGEST_SIZE 20
+#define SHA1_BLOCK_SIZE 64
+
+#define SHA1_H0 0x67452301UL
+#define SHA1_H1 0xefcdab89UL
+#define SHA1_H2 0x98badcfeUL
+#define SHA1_H3 0x10325476UL
+#define SHA1_H4 0xc3d2e1f0UL
+
+extern const u8 sha1_zero_message_hash[SHA1_DIGEST_SIZE];
+
+struct sha1_state {
+ u32 state[SHA1_DIGEST_SIZE / 4];
+ u64 count;
+ u8 buffer[SHA1_BLOCK_SIZE];
+};
+
+struct shash_desc;
+
+extern int crypto_sha1_update(struct shash_desc *desc, const u8 *data,
+ unsigned int len);
+
+extern int crypto_sha1_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);
+
+#endif /* _CRYPTO_SHA1_H */
diff --git a/include/crypto/sha1_base.h b/include/crypto/sha1_base.h
index a5d6033efef7..2e0e7c3827d1 100644
--- a/include/crypto/sha1_base.h
+++ b/include/crypto/sha1_base.h
@@ -9,7 +9,7 @@
#define _CRYPTO_SHA1_BASE_H
#include <crypto/internal/hash.h>
-#include <crypto/sha.h>
+#include <crypto/sha1.h>
#include <linux/crypto.h>
#include <linux/module.h>
#include <linux/string.h>
diff --git a/include/crypto/sha.h b/include/crypto/sha2.h
index 4ff3da816630..2838f529f31e 100644
--- a/include/crypto/sha.h
+++ b/include/crypto/sha2.h
@@ -1,16 +1,13 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
- * Common values for SHA algorithms
+ * Common values for SHA-2 algorithms
*/
-#ifndef _CRYPTO_SHA_H
-#define _CRYPTO_SHA_H
+#ifndef _CRYPTO_SHA2_H
+#define _CRYPTO_SHA2_H
#include <linux/types.h>
-#define SHA1_DIGEST_SIZE 20
-#define SHA1_BLOCK_SIZE 64
-
#define SHA224_DIGEST_SIZE 28
#define SHA224_BLOCK_SIZE 64
@@ -23,12 +20,6 @@
#define SHA512_DIGEST_SIZE 64
#define SHA512_BLOCK_SIZE 128
-#define SHA1_H0 0x67452301UL
-#define SHA1_H1 0xefcdab89UL
-#define SHA1_H2 0x98badcfeUL
-#define SHA1_H3 0x10325476UL
-#define SHA1_H4 0xc3d2e1f0UL
-
#define SHA224_H0 0xc1059ed8UL
#define SHA224_H1 0x367cd507UL
#define SHA224_H2 0x3070dd17UL
@@ -65,8 +56,6 @@
#define SHA512_H6 0x1f83d9abfb41bd6bULL
#define SHA512_H7 0x5be0cd19137e2179ULL
-extern const u8 sha1_zero_message_hash[SHA1_DIGEST_SIZE];
-
extern const u8 sha224_zero_message_hash[SHA224_DIGEST_SIZE];
extern const u8 sha256_zero_message_hash[SHA256_DIGEST_SIZE];
@@ -75,12 +64,6 @@ extern const u8 sha384_zero_message_hash[SHA384_DIGEST_SIZE];
extern const u8 sha512_zero_message_hash[SHA512_DIGEST_SIZE];
-struct sha1_state {
- u32 state[SHA1_DIGEST_SIZE / 4];
- u64 count;
- u8 buffer[SHA1_BLOCK_SIZE];
-};
-
struct sha256_state {
u32 state[SHA256_DIGEST_SIZE / 4];
u64 count;
@@ -95,12 +78,6 @@ struct sha512_state {
struct shash_desc;
-extern int crypto_sha1_update(struct shash_desc *desc, const u8 *data,
- unsigned int len);
-
-extern int crypto_sha1_finup(struct shash_desc *desc, const u8 *data,
- unsigned int len, u8 *hash);
-
extern int crypto_sha256_update(struct shash_desc *desc, const u8 *data,
unsigned int len);
@@ -114,16 +91,6 @@ 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
@@ -164,4 +131,4 @@ static inline void sha224_init(struct sha256_state *sctx)
void sha224_update(struct sha256_state *sctx, const u8 *data, unsigned int len);
void sha224_final(struct sha256_state *sctx, u8 *out);
-#endif
+#endif /* _CRYPTO_SHA2_H */
diff --git a/include/crypto/sha256_base.h b/include/crypto/sha256_base.h
index 93f9fd21cc06..76173c613058 100644
--- a/include/crypto/sha256_base.h
+++ b/include/crypto/sha256_base.h
@@ -9,7 +9,7 @@
#define _CRYPTO_SHA256_BASE_H
#include <crypto/internal/hash.h>
-#include <crypto/sha.h>
+#include <crypto/sha2.h>
#include <linux/crypto.h>
#include <linux/module.h>
#include <linux/string.h>
diff --git a/include/crypto/sha512_base.h b/include/crypto/sha512_base.h
index 93ab73baa38e..b370b3340b16 100644
--- a/include/crypto/sha512_base.h
+++ b/include/crypto/sha512_base.h
@@ -9,7 +9,7 @@
#define _CRYPTO_SHA512_BASE_H
#include <crypto/internal/hash.h>
-#include <crypto/sha.h>
+#include <crypto/sha2.h>
#include <linux/crypto.h>
#include <linux/module.h>
#include <linux/string.h>