serialization

type MessageHeader struct {
	// 											// 1, comes from AlgorithmSuite, message version, supported only version 2, always present as 0x02.
	AlgorithmSuite *suite.AlgorithmSuite // 2, AlgorithmID in AlgorithmSuite, supported only 0x0578 (1400) and 0x0478 (1144), always present. Reference (https://docs.aws.amazon.com/encryption-sdk/latest/developer-guide/algorithms-reference.html)
	MessageID      []byte                // 32, MessageID (random 256-bit value). Always present. Algorithm suites with key commitment (algorithm ID 04xx and 05xx) for the extract step (HKDF with SHA-512) used as salt.

	AADData               *aadData           // AADData is AAD Key-Value Pair (AADData) data (Key-Value Pair Count + []keyValuePair data). Bytes varies, aadLen = N bytes of AADData. present if aadLen > 0.
	EncryptedDataKeyCount int                // 2, EncryptedDataKeyCount is count of EncryptedDataKeys below, always present.
	EncryptedDataKeys     []encryptedDataKey // EncryptedDataKeys varies

	FrameLength        int    // 4, FrameLength is the length of each frame of framed data. It is a 4-byte value interpreted as a 32-bit unsigned integer that specifies the number of bytes in each frame. When the data is non-framed, that is, when the value of the contentType field is 0x01, this value must be 0.
	AlgorithmSuiteData []byte // 32 bytes, AlgorithmSuiteData
	// contains filtered or unexported fields
}

type MessageHeaderParams struct {
	AlgorithmSuite     *suite.AlgorithmSuite
	MessageID          []byte
	AADData            *aadData
	EncryptedDataKeys  []encryptedDataKey
	ContentType        suite.ContentType
	FrameLength        int
	AlgorithmSuiteData []byte
}