RSA private key DER decode fails without CRT components

[Brahmaji K <brahmaji.k@xxxxxxxxx>]

Hi Team,

I'm trying to decode the RSA private key which was DER encoded earlier without CRT components (p, q, dmp1, dmq1 and iqmp is NULL). I'm using the same openssl version for both encoding and decoding, encoding works fine but decode fails. In decode, we call EVP_PKEY2PKCS8() function, this is failing with below error:

469393408:error:0D078079:asn1 encoding routines:asn1_item_embed_d2i:field missing:crypto/asn1/tasn_dec.c:425:Field=p, Type=RSAPrivateKey

The above error is because field p is NULL, but with same p is NULL encoding is successful. Any idea why encode is Success but decode fails?

Thanks and Regards,

Brahmaji K