Feature request: Add the ability to omit the PKCS#1 algorithmIdentifier when verifying RSA signatures

Some non-standard signing schemes use PKCS#1 padding and key format, but they omit the algorithmIdentifier ASN.1 constant that the RFC specifies.

This leads to signature verification failing with `Too few bytes to read ASN.1 value` due to the missing algorithmIdentifier, while the decryption actually succeeds.

Thanks!