From 6c45741d6a91c5a2f1aedcc4c59f9149e8ee8f78 Mon Sep 17 00:00:00 2001
From: Evgeny Margolis <emargolis@google.com>
Date: Wed, 2 Mar 2022 02:44:14 -0800
Subject: [PATCH] Minor Update to Spake2pVerifier Serializer APIs (#15703)

---
 src/crypto/CHIPCryptoPAL.cpp | 4 ++--
 src/crypto/CHIPCryptoPAL.h   | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/crypto/CHIPCryptoPAL.cpp b/src/crypto/CHIPCryptoPAL.cpp
index 20f345eb59871f..6e29a8b8665df2 100644
--- a/src/crypto/CHIPCryptoPAL.cpp
+++ b/src/crypto/CHIPCryptoPAL.cpp
@@ -515,7 +515,7 @@ CHIP_ERROR Spake2p_P256_SHA256_HKDF_HMAC::ComputeW0(uint8_t * w0out, size_t * w0
     return CHIP_NO_ERROR;
 }
 
-CHIP_ERROR Spake2pVerifier::Serialize(MutableByteSpan & outSerialized)
+CHIP_ERROR Spake2pVerifier::Serialize(MutableByteSpan & outSerialized) const
 {
     VerifyOrReturnError(outSerialized.size() >= kSpake2p_VerifierSerialized_Length, CHIP_ERROR_INVALID_ARGUMENT);
 
@@ -527,7 +527,7 @@ CHIP_ERROR Spake2pVerifier::Serialize(MutableByteSpan & outSerialized)
     return CHIP_NO_ERROR;
 }
 
-CHIP_ERROR Spake2pVerifier::Deserialize(ByteSpan inSerialized)
+CHIP_ERROR Spake2pVerifier::Deserialize(const ByteSpan & inSerialized)
 {
     VerifyOrReturnError(inSerialized.size() >= kSpake2p_VerifierSerialized_Length, CHIP_ERROR_INVALID_ARGUMENT);
 
diff --git a/src/crypto/CHIPCryptoPAL.h b/src/crypto/CHIPCryptoPAL.h
index 9ccbdbd62e79f1..aeab2efa0de674 100644
--- a/src/crypto/CHIPCryptoPAL.h
+++ b/src/crypto/CHIPCryptoPAL.h
@@ -1252,8 +1252,8 @@ class Spake2pVerifier
     uint8_t mW0[kP256_FE_Length];
     uint8_t mL[kP256_Point_Length];
 
-    CHIP_ERROR Serialize(MutableByteSpan & outSerialized);
-    CHIP_ERROR Deserialize(ByteSpan inSerialized);
+    CHIP_ERROR Serialize(MutableByteSpan & outSerialized) const;
+    CHIP_ERROR Deserialize(const ByteSpan & inSerialized);
 
     /**
      * @brief Generate the Spake2+ verifier.