#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <openssl/bio.h>
#include <openssl/pem.h>
#include <openssl/rand.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include "crypto.h"
#include "utils.h"

Include dependency graph for crypto.c:

Functions
static size_t	crypto_pem_length (const char *pem)
	Compute the PEM length. More...

EC_KEY *	crypto_ec_bytes_to_key (const unsigned char *buffer, long size)
	Get the ec key from ec key bytes. More...

size_t	crypto_aes_decrypt (struct crypto_core crypto_core, const unsigned char data, int size, unsigned char **buffer)
	Decrypt data using AES. More...

size_t	crypto_aes_encrypt (struct crypto_core crypto_core, const unsigned char data, int data_len, unsigned char **buffer)
	Encrypt data using AES. More...

int	crypto_ec_key_to_bytes (EC_KEY key, unsigned char *buffer)
	Get the ec key bytes. More...

unsigned int	crypto_ec_sign_with_key (EC_KEY key, const unsigned char digest, int digest_len, unsigned char **signature)
	Sign a digest with a specific key. More...

unsigned int	crypto_ec_sign (struct crypto_core crypto_core, const unsigned char digest, int digest_len, unsigned char **signature)
	Sign a digest. More...

size_t	crypto_hash (const void data, size_t data_len, unsigned char *hash)
	Hash data using sha256. More...

size_t	crypto_ec_pubkey_to_bytes (const EC_KEY key, unsigned char *buffer)
	Get the ec key bytes. More...

int	crypto_x509_get_bytes (struct crypto_core crypto_core, unsigned char *buffer)
	Get the x509 certificate bytes. More...

static bool	crypto_x509_add_ext (X509 cert, int nid, const char value, bool critical)
	Add an extension to a x509 certificate. More...

static X509 *	crypto_x509_generate (EC_KEY *key)
	Generate a new x509 certificate from an ec key. More...

EC_KEY *	crypto_ec_generate_key (void)
	Generate an ec pair key. More...

static X509 *	crypto_x509_from_file (const char dirpath, const char filename)
	Get the x509 from file. More...

static X509 *	crypto_x509_from_pem (const char *x509_pem)
	Get the x509 from PEM. More...

static EC_KEY *	crypto_ec_privkey_from_file (const char dirpath, const char filename)
	Get the ec private key from file. More...

static EC_KEY *	crypto_ec_privkey_from_pem (const char *private_key_pem)
	Get the ec private key from PEM. More...

static bool	crypto_entropy_from_file (const char dirpath, const char filename, uint8_t entropy[48])
	Get the entropy from file. More...

EC_KEY *	crypto_ec_pubkey_from_priv (EC_KEY *privkey)
	Get the ec public key from its private key. More...

bool	crypto_new (const char certificate, const char private_key, const uint8_t entropy[48], struct crypto_core **core_ref)
	Instantiate a new crypto core. More...

bool	crypto_new_ephemeral (struct crypto_core **core_ref)
	Instantiate a new ephemeral crypto core. More...

bool	crypto_new_from_dir (const char dirpath, struct crypto_core *core_ref)
	Setup a crypto core from a dir. More...

void	crypto_free (struct crypto_core *crypto_core)
	Release the memory allocated by the crypto_core. More...

Function Documentation

size_t crypto_aes_decrypt	(	struct crypto_core *	core,
		const unsigned char *	data,
		int	size,
		unsigned char **	buffer
	)

Decrypt data using AES.

Parameters

core	The crypto core.
data	The data to decrypt.
size	The data size.
buffer	The resulting buffer where clear data is put.

Returns: The size of the buffer.

size_t crypto_aes_encrypt	(	struct crypto_core *	core,
		const unsigned char *	data,
		int	data_len,
		unsigned char **	buffer
	)

Encrypt data using AES.

Parameters

core	The crypto core.
data	The data to encrypt.
data_len	The data size.
buffer	The resulting buffer where cipher data is put.

Returns: The size of the buffer.

EC_KEY* crypto_ec_bytes_to_key	(	const unsigned char *	buffer,
		long	size
	)

Get the ec key from ec key bytes.

Parameters

buffer	The buffer containing the ec key bytes.
size	The size of the buffer.

Returns: The ec key.

EC_KEY* crypto_ec_generate_key ( void )

Generate an ec pair key.

Returns: Success: The generated ec pair key. Failure: NULL.

int crypto_ec_key_to_bytes	(	EC_KEY *	key,
		unsigned char **	buffer
	)

Get the ec key bytes.

Parameters

key	The ec key.
buffer	The buffer use to put the bytes

Returns: The size of the buffer.

static EC_KEY* crypto_ec_privkey_from_file	(	const char *	dirpath,
		const char *	filename
	)

static

Get the ec private key from file.

Parameters

dirpath	The path of the directory.
filename	The filename.

Returns: Success: The private key. Failure: NULL.

static EC_KEY* crypto_ec_privkey_from_pem ( const char * private_key_pem )

static

Get the ec private key from PEM.

Parameters

private_key_pem The ec private key PEM.

Returns: Success: The private key. Failure: NULL.

EC_KEY* crypto_ec_pubkey_from_priv ( EC_KEY * privkey )

Get the ec public key from its private key.

Parameters

privkey the ec privkey.

Returns: The ec public key

size_t crypto_ec_pubkey_to_bytes	(	const EC_KEY *	key,
		unsigned char **	buffer
	)

Get the ec key bytes.

Parameters

key	The ec key.
buffer	The buffer use to put the bytes.

Returns: The size of the buffer.

unsigned int crypto_ec_sign	(	struct crypto_core *	core,
		const unsigned char *	digest,
		int	digest_len,
		unsigned char **	signature
	)

Sign a digest.

Parameters

core	The crypto core.
digest	The digest.
digest_len	The digest length?
signature	The ref buffer to put the signature.

Returns: The size of the signature.

unsigned int crypto_ec_sign_with_key	(	EC_KEY *	key,
		const unsigned char *	digest,
		int	digest_len,
		unsigned char **	signature
	)

Sign a digest with a specific key.

Parameters

key	The ec key.
digest	The digest.
digest_len	The digest len.
signature	The ref buffer to put the signature.

Returns: The size of the signature.

static bool crypto_entropy_from_file	(	const char *	dirpath,
		const char *	filename,
		uint8_t	entropy[48]
	)

static

Get the entropy from file.

Parameters

dirpath	The path of the directory.
filename	The filename.
entropy	The entropy to setu.

void crypto_free ( struct crypto_core * core )

Release the memory allocated by the crypto_core.

Parameters

core	The crypto core to release.

size_t crypto_hash	(	const void *	data,
		size_t	data_len,
		unsigned char **	hash
	)

Hash data using sha256.

Parameters

data	The data.
data_len	The data length.
hash	The ref buffer to put the hash.

Returns: The size of the hash.

bool crypto_new	(	const char *	certificate,
		const char *	private_key,
		const uint8_t	entropy[48],
		struct crypto_core **	core_ref
	)

Instantiate a new crypto core.

Parameters

certificate	PEM ec certificate.
private_key	PEM ec Private key of the certificate.
entropy	Random bits used in encryption.
core_ref	The crypto core reference.

Returns: Sucess: true. Failure: false.

bool crypto_new_ephemeral ( struct crypto_core ** core_ref )

Instantiate a new ephemeral crypto core.

Parameters

core_ref The crypto core reference.

Returns: Sucess: true. Failure: false.

bool crypto_new_from_dir	(	const char *	dirpath,
		struct crypto_core **	core_ref
	)

Setup a crypto core from a dir.

Parameters

dirpath	The path of the setup directory.
core_ref	The crypto core to setup.

Returns: Sucess: true. Failure: false.

static size_t crypto_pem_length ( const char * pem )

static

Compute the PEM length.

Parameters

pem The PEM.

Returns: Success: PEM length. Failure: 0.

static bool crypto_x509_add_ext	(	X509 *	cert,
		int	nid,
		const char *	value,
		bool	critical
	)

static

Add an extension to a x509 certificate.

Parameters

cert	The cert to add the extension.
nid	The nid of the extenstion.
value	The value of the extension.
critical	The extension critism.

Returns: Success: true. Failure: false.

static X509* crypto_x509_from_file	(	const char *	dirpath,
		const char *	filename
	)

static

Get the x509 from file.

Parameters

dirpath	The path of the directory.
filename	The filename.

Returns: Success: The x509. Failure: NULL.

static X509* crypto_x509_from_pem ( const char * x509_pem )

static

Get the x509 from PEM.

Parameters

x509_pem The x509 PEM.

Returns: Success: The x509. Failure: NULL.

static X509* crypto_x509_generate ( EC_KEY * key )

static

Generate a new x509 certificate from an ec key.

Parameters

key	The ec key.

Returns: The new x509 certificate.

int crypto_x509_get_bytes	(	struct crypto_core *	core,
		unsigned char **	buffer
	)

Get the x509 certificate bytes.

Parameters

core	The crypto core.
buffer	The buffer to put the bytes.

Returns: The buffer length.

Functions

Function Documentation