hmac Namespace Reference

This namespace includes the functions needed to generate an HMAC value Using OpenSSL. More...

Functions
std::string	generate (const std::string &message, const std::array< uint64_t, 4 > &key, const size_t &rounds)
	Generate an HMAC for a message.

Variables
unsigned char	md_value [EVP_MAX_MD_SIZE]
unsigned int	md_len = 0

Detailed Description

This namespace includes the functions needed to generate an HMAC value Using OpenSSL.

Remarks

To compile, add -lssl -lcrypto to your compiler's arguments!

Function Documentation

generate()

std::string hmac::generate	(	const std::string &	message,
		const std::array< uint64_t, 4 > &	key,
		const size_t &	rounds )

Generate an HMAC for a message.

Parameters

message	The string to compute the HMAC for.
key	The set of prime numbers to use as the key.
rounds	The amount of AES rounds (To determine key size)

Returns

A string containing the HMAC value.

Exceptions

std::runtime_error	if the HMAC could not be generated.
std::runtime_error	if the round amount is invalid.

Remarks

This function uses the OpenSSL implementation of HMAC-SHA256.

https://docs.openssl.org/master/man3/HMAC/#synopsis