Function esp_idf_svc::sys::esp_aes_gcm_auth_decrypt

pub unsafe extern "C" fn esp_aes_gcm_auth_decrypt(
    ctx: *mut esp_gcm_context,
    length: usize,
    iv: *const u8,
    iv_len: usize,
    aad: *const u8,
    aad_len: usize,
    tag: *const u8,
    tag_len: usize,
    input: *const u8,
    output: *mut u8,
) -> i32

\brief This function performs a GCM authenticated decryption of a buffer.

\note For decryption, the output buffer cannot be the same as input buffer. If the buffers overlap, the output buffer must trail at least 8 Bytes behind the input buffer.

\param ctx The GCM context. \param length The length of the input data. This must be a multiple of 16 except in the last call before mbedtls_gcm_finish(). \param iv The initialization vector. \param iv_len The length of the IV. \param aad The buffer holding the additional data. \param aad_len The length of the additional data. \param tag The buffer holding the tag. \param tag_len The length of the tag. \param input The buffer holding the input data. \param output The buffer for holding the output data.

\return 0 if successful and authenticated. \return #MBEDTLS_ERR_GCM_AUTH_FAILED if the tag does not match.