[PATCH v3 02/12] include/hash: add SHA384 hash wrapper declaration for wolfTPM

[Aidan Garske]

From: Aidan <aidan at wolfssl.com>

Add #include <linux/types.h> to include/hash.h so that basic types
(u8, u32, etc.) are available to all includers.

Add a wc_Sha384Hash() wrapper declaration in include/hash.h, gated
by WOLFTPM2_NO_WOLFCRYPT. When wolfTPM is built without wolfCrypt,
this wrapper provides SHA-384 hashing via U-Boot's hash subsystem,
which is needed for Infineon TPM firmware update manifest validation.

Signed-off-by: Aidan Garske <aidan at wolfssl.com>
---
 include/hash.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/include/hash.h b/include/hash.h
index 8b3f79ec473..26043c43a9c 100644
--- a/include/hash.h
+++ b/include/hash.h
@@ -6,6 +6,8 @@
 #ifndef _HASH_H
 #define _HASH_H
 
+#include <linux/types.h>
+
 #ifdef USE_HOSTCC
 #include <linux/kconfig.h>
 #endif
@@ -163,4 +165,20 @@ int hash_progressive_lookup_algo(const char *algo_name,
  */
 int hash_parse_string(const char *algo_name, const char *str, uint8_t *result);
 
+#ifdef WOLFTPM2_NO_WOLFCRYPT
+/**
+ * wc_Sha384Hash() - Calculate SHA384 hash
+ * @data:	Data to hash
+ * @len:	Length of data
+ * @hash:	Output buffer for hash
+ *
+ * This is a wrapper function to provide wolfCrypt-compatible SHA384 hashing
+ * when wolfCrypt is not available.
+ *
+ * Return: 0 on success, -1 on error
+ */
+int wc_Sha384Hash(const unsigned char *data, unsigned int len,
+		  unsigned char *hash);
+#endif /* WOLFTPM2_NO_WOLFCRYPT */
+
 #endif
-- 
2.47.3