Function esp_idf_sys::mbedtls_sha256

pub unsafe extern "C" fn mbedtls_sha256(
    input: *const c_uchar,
    ilen: usize,
    output: *mut c_uchar,
    is224: c_int
) -> c_int

\brief This function calculates the SHA-224 or SHA-256 checksum of a buffer.

            The function allocates the context, performs the
            calculation, and frees the context.

            The SHA-256 result is calculated as
            output = SHA-256(input buffer).

\param input The buffer holding the data. This must be a readable buffer of length \p ilen Bytes. \param ilen The length of the input data in Bytes. \param output The SHA-224 or SHA-256 checksum result. This must be a writable buffer of length \c 32 bytes for SHA-256, \c 28 bytes for SHA-224. \param is224 Determines which function to use. This must be either \c 0 for SHA-256, or \c 1 for SHA-224.

\return \c 0 on success. \return A negative error code on failure.