krb5_c_is_coll_proof_cksum
if (!krb5_c_is_coll_proof_cksum(his_cksum->checksum_type))
return krb5_c_is_coll_proof_cksum (ctype);
if (!krb5_c_is_coll_proof_cksum(sumtype)
if (!krb5_c_is_coll_proof_cksum(message->checksum->checksum_type) ||
krb5_boolean KRB5_CALLCONV krb5_c_is_coll_proof_cksum