Is is important to check the implement, Can you make sure that there are same between PEI and DXE?

Below is the definition and implement about d2i_PKCS7, can you study first?
DECLARE_ASN1_FUNCTIONS(PKCS7)
IMPLEMENT_ASN1_FUNCTIONS(PKCS7)

I am busy recently until August, so I can only give you the key point.

From: discuss@edk2.groups.io <discuss@edk2.groups.io> On Behalf Of Sukerkar, Amol N
Sent: Thursday, April 30, 2020 6:01 AM
To: discuss@edk2.groups.io
Cc: Sukerkar, Amol N <amol.n.sukerkar@...>
Subject: [edk2-discuss] Using PKCS7 API in PEI Phase

Hello,

I am trying to use PKCS7 verification mechanism in PEI phase. Calling d2i_PKCS7 returns NULL in PEI phase (Cache As RAM). However, d2i_PKCS7 is successful when called in DXE phase.

Any idea what might be the issue?

Thanks,
Amol