While playing around with creating an RSA public key, and decoding it using a home brew ASN.1 decoder, I ran into the fact that the public key is BITWRAP-ed. BITWRAP seems to be an OpenSSL modifier, and I wonder why it is needed, what the rationale is?
This page describes what BITWRAP is but not why it is needed.
Why can't $n$ and $e$ be encoded in a regular non-BITWRAP-ed ASN.1 sequence?
Below example shows the BITWRAP modifier in an ASN1 definition (copied from OpenSSL docs):
asn1=SEQUENCE:pubkeyinfo # BITWRAP here [pubkeyinfo] algorithm=SEQUENCE:rsa_alg pubkey=BITWRAP,SEQUENCE:rsapubkey [rsa_alg] algorithm=OID:rsaEncryption parameter=NULL [rsapubkey] n=INTEGER:0xBB6FE79432CC6EA2D8F970675A5A87BFBE1AFF0BE63E879F2AFFB93644\ D4D2C6D000430DEC66ABF47829E74B8C5108623A1C0EE8BE217B3AD8D36D5EB4FCA1D9 e=INTEGER:0x010001