crypto::cipher::gcm_t Class Reference

Inheritance diagram for crypto::cipher::gcm_t:

Collaboration diagram for crypto::cipher::gcm_t:

Public Member Functions
int	decrypt (const std::string_view &cipher, std::vector< std::uint8_t > &plaintext, aes_t *iv)
int	encrypt (const std::string_view &plaintext, std::uint8_t *tag, std::uint8_t *ciphertext, aes_t *iv)
	Encrypts the plaintext using AES GCM mode.
int	encrypt (const std::string_view &plaintext, std::uint8_t *tagged_cipher, aes_t *iv)
	Encrypts the plaintext using AES GCM mode. length of cipher must be at least: round_to_pkcs7_padded(plaintext.size()) + crypto::cipher::tag_size.
	gcm_t (const crypto::aes_t &key, bool padding=true)
	gcm_t (gcm_t &&) noexcept=default
gcm_t &	operator= (gcm_t &&) noexcept=default

Additional Inherited Members
Public Attributes inherited from crypto::cipher::cipher_t
cipher_ctx_t	decrypt_ctx
cipher_ctx_t	encrypt_ctx
aes_t	key
bool	padding

Member Function Documentation

encrypt() [1/2]

int crypto::cipher::gcm_t::encrypt	(	const std::string_view &	plaintext,
		std::uint8_t *	tag,
		std::uint8_t *	ciphertext,
		aes_t *	iv )

Encrypts the plaintext using AES GCM mode.

Parameters

plaintext	The plaintext data to be encrypted.
tag	The buffer where the GCM tag will be written.
ciphertext	The buffer where the resulting ciphertext will be written.
iv	The initialization vector to be used for the encryption.

Returns

The total length of the ciphertext and GCM tag. Returns -1 in case of an error.

This function encrypts the given plaintext using the AES key in GCM mode. The initialization vector (IV) is also provided. The function handles the creation and initialization of the encryption context, and manages the encryption process. The resulting ciphertext and the GCM tag are written into the tagged_cipher buffer.

encrypt() [2/2]

int crypto::cipher::gcm_t::encrypt	(	const std::string_view &	plaintext,
		std::uint8_t *	tagged_cipher,
		aes_t *	iv )

Encrypts the plaintext using AES GCM mode. length of cipher must be at least: round_to_pkcs7_padded(plaintext.size()) + crypto::cipher::tag_size.

Parameters

plaintext	The plaintext data to be encrypted.
tagged_cipher	The buffer where the resulting ciphertext and GCM tag will be written.
iv	The initialization vector to be used for the encryption.

Returns

The total length of the ciphertext and GCM tag written into tagged_cipher. Returns -1 in case of an error.

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The documentation for this class was generated from the following files:

• src/crypto.h
• src/crypto.cpp