From c3c479537eb06cf2e0e7b5b48558800d1d002edf Mon Sep 17 00:00:00 2001
From: wyhong <30567533+wy-hh@users.noreply.github.com>
Date: Thu, 3 Aug 2023 13:17:55 +0800
Subject: [PATCH] Add macro to set alignment of sha256 context (#28426)

---
 src/crypto/CHIPCryptoPAL.h | 2 +-
 src/lib/core/CHIPConfig.h  | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/crypto/CHIPCryptoPAL.h b/src/crypto/CHIPCryptoPAL.h
index 88abc189b5b06f..65511668b1d5fd 100644
--- a/src/crypto/CHIPCryptoPAL.h
+++ b/src/crypto/CHIPCryptoPAL.h
@@ -803,7 +803,7 @@ CHIP_ERROR Hash_SHA1(const uint8_t * data, size_t data_length, uint8_t * out_buf
  *        All implementations must check for std::is_trivially_copyable.
  **/
 
-struct alignas(size_t) HashSHA256OpaqueContext
+struct alignas(CHIP_CONFIG_SHA256_CONTEXT_ALIGN) HashSHA256OpaqueContext
 {
     uint8_t mOpaque[kMAX_Hash_SHA256_Context_Size];
 };
diff --git a/src/lib/core/CHIPConfig.h b/src/lib/core/CHIPConfig.h
index 80b3d18cfe410f..2aba0915a2d52d 100644
--- a/src/lib/core/CHIPConfig.h
+++ b/src/lib/core/CHIPConfig.h
@@ -185,6 +185,15 @@
 #define CHIP_CONFIG_SHA256_CONTEXT_SIZE ((sizeof(unsigned int) * (8 + 2 + 16 + 2)) + sizeof(uint64_t))
 #endif // CHIP_CONFIG_SHA256_CONTEXT_SIZE
 
+/**
+ *  @def CHIP_CONFIG_SHA256_CONTEXT_ALIGN
+ *
+ * @brief The alignment of SHA256 context buffer.
+ */
+#ifndef CHIP_CONFIG_SHA256_CONTEXT_ALIGN
+#define CHIP_CONFIG_SHA256_CONTEXT_ALIGN size_t
+#endif // CHIP_CONFIG_SHA256_CONTEXT_ALIGN
+
 /**
  *  @def CHIP_CONFIG_MAX_UNSOLICITED_MESSAGE_HANDLERS
  *