pub unsafe extern "C" fn ASN1_item_sign_ctx(
    it: *const ASN1_ITEM,
    algor1: *mut X509_ALGOR,
    algor2: *mut X509_ALGOR,
    signature: *mut ASN1_BIT_STRING,
    asn: *mut c_void,
    ctx: *mut EVP_MD_CTX
) -> c_int