In this post, you’ll learn more about the Error TPM_E_PCP_UNSUPPORTED_PSS_SALT – 0x40290423 that is returned when working with the COM-based APIs in Win32
Win32 COM Error
TPM_E_PCP_UNSUPPORTED_PSS_SALT – 0x40290423
Win32 COM Error Error Description
The requested salt size for signing with RSAPSS does not match what the TPM uses.