mbedtls_gcm_update() function

The GCM context. This must be initialized.

The length of the input data. This must be a multiple of 16 except in the last call before mbedtls_gcm_finish().

The buffer holding the input data. If \p length is greater than zero, this must be a readable buffer of at least that size in Bytes.

The buffer for holding the output data. If \p length is greater than zero, this must be a writable buffer of at least that size in Bytes.

This function finishes the GCM operation and generates the authentication tag. It wraps up the GCM stream, and generates the tag. The tag can have a maximum length of 16 Bytes.

This function associates a GCM context with a cipher algorithm and a key.

This function performs GCM encryption or decryption of a buffer. \warning When this function performs a decryption, it outputs the authentication tag and does not verify that the data is authentic. You should use this function to perform encryption only. For decryption, use mbedtls_gcm_auth_decrypt() instead.

This function starts a GCM encryption or decryption operation.

This function initializes the specified GCM context, to make references valid, and prepares the context for mbedtls_gcm_setkey() or mbedtls_gcm_free(). The function does not bind the GCM context to a particular cipher, nor set the key. For this purpose, use mbedtls_gcm_setkey().

This function performs a GCM authenticated decryption of a buffer.

This function clears a GCM context and the underlying cipher sub-context.