decode_asn1.py 文件源码

def _decode_authority_information_access(backend, aia):
    aia = backend._ffi.cast("Cryptography_STACK_OF_ACCESS_DESCRIPTION *", aia)
    aia = backend._ffi.gc(aia, backend._lib.sk_ACCESS_DESCRIPTION_free)
    num = backend._lib.sk_ACCESS_DESCRIPTION_num(aia)
    access_descriptions = []
    for i in range(num):
        ad = backend._lib.sk_ACCESS_DESCRIPTION_value(aia, i)
        backend.openssl_assert(ad.method != backend._ffi.NULL)
        oid = x509.ObjectIdentifier(_obj2txt(backend, ad.method))
        backend.openssl_assert(ad.location != backend._ffi.NULL)
        gn = _decode_general_name(backend, ad.location)
        access_descriptions.append(x509.AccessDescription(oid, gn))

    return x509.AuthorityInformationAccess(access_descriptions)