crypto: sha256 - Merge crypto/sha256.h into crypto/sha.h

The generic sha256 implementation from lib/crypto/sha256.c uses data
structs defined in crypto/sha.h, so lets move the function prototypes
there too.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

arch/s390/purgatory/purgatory.c

@@ -9,7 +9,7 @@
 
 #include <linux/kexec.h>
 #include <linux/string.h>
-#include <crypto/sha256.h>
+#include <crypto/sha.h>
 #include <asm/purgatory.h>
 
 int verify_sha256_digest(void)

arch/x86/purgatory/purgatory.c

@@ -9,7 +9,7 @@
  */
 
 #include <linux/bug.h>
-#include <crypto/sha256.h>
+#include <crypto/sha.h>
 #include <asm/purgatory.h>
 
 #include "../boot/string.h"

crypto/sha256_generic.c

@@ -13,7 +13,6 @@
 #include <linux/mm.h>
 #include <linux/types.h>
 #include <crypto/sha.h>
-#include <crypto/sha256.h>
 #include <crypto/sha256_base.h>
 #include <asm/byteorder.h>
 #include <asm/unaligned.h>

include/crypto/sha.h

@@ -112,4 +112,25 @@ extern int crypto_sha512_update(struct shash_desc *desc, const u8 *data,
 
 extern int crypto_sha512_finup(struct shash_desc *desc, const u8 *data,
 			       unsigned int len, u8 *hash);
+
+/*
+ * 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
+ * hash APIs from include/crypto/hash.h. Especially when hashing large
+ * amounts of data as those APIs may be hw-accelerated.
+ *
+ * For details see lib/crypto/sha256.c
+ */
+
+extern int sha256_init(struct sha256_state *sctx);
+extern int sha256_update(struct sha256_state *sctx, const u8 *input,
+			 unsigned int length);
+extern int sha256_final(struct sha256_state *sctx, u8 *hash);
+
+extern int sha224_init(struct sha256_state *sctx);
+extern int sha224_update(struct sha256_state *sctx, const u8 *input,
+			 unsigned int length);
+extern int sha224_final(struct sha256_state *sctx, u8 *hash);
+
 #endif

include/crypto/sha256.h

-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- *  Copyright (C) 2014 Red Hat Inc.
- *
- *  Author: Vivek Goyal <vgoyal@redhat.com>
- */
-
-#ifndef SHA256_H
-#define SHA256_H
-
-#include <linux/types.h>
-#include <crypto/sha.h>
-
-/*
- * 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
- * hash APIs from include/crypto/hash.h. Especially when hashing large
- * amounts of data as those APIs may be hw-accelerated.
- *
- * For details see lib/crypto/sha256.c
- */
-
-extern int sha256_init(struct sha256_state *sctx);
-extern int sha256_update(struct sha256_state *sctx, const u8 *input,
-			 unsigned int length);
-extern int sha256_final(struct sha256_state *sctx, u8 *hash);
-
-extern int sha224_init(struct sha256_state *sctx);
-extern int sha224_update(struct sha256_state *sctx, const u8 *input,
-			 unsigned int length);
-extern int sha224_final(struct sha256_state *sctx, u8 *hash);
-
-#endif /* SHA256_H */

lib/crypto/sha256.c

@@ -15,7 +15,7 @@
 #include <linux/export.h>
 #include <linux/module.h>
 #include <linux/string.h>
-#include <crypto/sha256.h>
+#include <crypto/sha.h>
 #include <asm/unaligned.h>
 
 static inline u32 Ch(u32 x, u32 y, u32 z)