zip_crypto_gnutls.c File Reference

#include <stdlib.h>
#include "zipint.h"
#include "zip_crypto.h"

Go to the source code of this file.

Functions
_zip_crypto_aes_t *	_zip_crypto_aes_new (const zip_uint8_t *key, zip_uint16_t key_size, zip_error_t *error)
bool	_zip_crypto_aes_encrypt_block (_zip_crypto_aes_t *aes, const zip_uint8_t *in, zip_uint8_t *out)
void	_zip_crypto_aes_free (_zip_crypto_aes_t *aes)
_zip_crypto_hmac_t *	_zip_crypto_hmac_new (const zip_uint8_t *secret, zip_uint64_t secret_length, zip_error_t *error)
void	_zip_crypto_hmac_free (_zip_crypto_hmac_t *hmac)
ZIP_EXTERN bool	zip_secure_random (zip_uint8_t *buffer, zip_uint16_t length)

Function Documentation

_zip_crypto_aes_encrypt_block()

bool _zip_crypto_aes_encrypt_block	(	_zip_crypto_aes_t *	aes,
		const zip_uint8_t *	in,
		zip_uint8_t *	out
	)

Definition at line 71 of file zip_crypto_gnutls.c.

                                                                                               {
    switch (aes->key_size) {
    case 128:
        nettle_aes128_encrypt(&aes->ctx.ctx_128, ZIP_CRYPTO_AES_BLOCK_LENGTH, out, in);
        break;
    case 192:
        nettle_aes192_encrypt(&aes->ctx.ctx_192, ZIP_CRYPTO_AES_BLOCK_LENGTH, out, in);
        break;
    case 256:
        nettle_aes256_encrypt(&aes->ctx.ctx_256, ZIP_CRYPTO_AES_BLOCK_LENGTH, out, in);
        break;
    }
 
    return true;
}

References _zip_crypto_aes_t::ctx, _zip_crypto_aes_t::ctx_128, _zip_crypto_aes_t::ctx_192, _zip_crypto_aes_t::ctx_256, in, _zip_crypto_aes_t::key_size, nettle_aes128_encrypt(), nettle_aes192_encrypt(), nettle_aes256_encrypt(), out, and ZIP_CRYPTO_AES_BLOCK_LENGTH.

_zip_crypto_aes_free()

void _zip_crypto_aes_free

(

_zip_crypto_aes_t *

aes

)

Definition at line 88 of file zip_crypto_gnutls.c.

                                             {
    if (aes == NULL) {
        return;
    }
 
    _zip_crypto_clear(aes, sizeof(*aes));
    free(aes);
}

References _zip_crypto_clear, free(), and NULL.

_zip_crypto_aes_new()

_zip_crypto_aes_t* _zip_crypto_aes_new	(	const zip_uint8_t *	key,
		zip_uint16_t	key_size,
		zip_error_t *	error
	)

Definition at line 41 of file zip_crypto_gnutls.c.

                                                                                       {
    _zip_crypto_aes_t *aes;
 
    if ((aes = (_zip_crypto_aes_t *)malloc(sizeof(*aes))) == NULL) {
        zip_error_set(error, ZIP_ER_MEMORY, 0);
        return NULL;
    }
 
    aes->key_size = key_size;
 
    switch (aes->key_size) {
    case 128:
        nettle_aes128_set_encrypt_key(&aes->ctx.ctx_128, key);
        break;
    case 192:
        nettle_aes192_set_encrypt_key(&aes->ctx.ctx_192, key);
        break;
    case 256:
        nettle_aes256_set_encrypt_key(&aes->ctx.ctx_256, key);
        break;
    default:
        zip_error_set(error, ZIP_ER_INVAL, 0);
        free(aes);
        return NULL;
    }
 
    return aes;
}

References _zip_crypto_aes_t::ctx, _zip_crypto_aes_t::ctx_128, _zip_crypto_aes_t::ctx_192, _zip_crypto_aes_t::ctx_256, error(), free(), key, _zip_crypto_aes_t::key_size, malloc(), nettle_aes128_set_encrypt_key(), nettle_aes192_set_encrypt_key(), nettle_aes256_set_encrypt_key(), NULL, ZIP_ER_INVAL, ZIP_ER_MEMORY, and zip_error_set().

_zip_crypto_hmac_free()

void _zip_crypto_hmac_free

(

_zip_crypto_hmac_t *

hmac

)

Definition at line 118 of file zip_crypto_gnutls.c.

                                                {
    zip_uint8_t buf[ZIP_CRYPTO_SHA1_LENGTH];
 
    if (hmac == NULL) {
        return;
    }
 
    gnutls_hmac_deinit(*hmac, buf);
    _zip_crypto_clear(hmac, sizeof(*hmac));
    free(hmac);
}

References _zip_crypto_clear, free(), NULL, and ZIP_CRYPTO_SHA1_LENGTH.

_zip_crypto_hmac_new()

_zip_crypto_hmac_t* _zip_crypto_hmac_new	(	const zip_uint8_t *	secret,
		zip_uint64_t	secret_length,
		zip_error_t *	error
	)

Definition at line 99 of file zip_crypto_gnutls.c.

                                                                                                {
    _zip_crypto_hmac_t *hmac;
 
    if ((hmac = (_zip_crypto_hmac_t *)malloc(sizeof(*hmac))) == NULL) {
        zip_error_set(error, ZIP_ER_MEMORY, 0);
        return NULL;
    }
 
    if (gnutls_hmac_init(hmac, GNUTLS_MAC_SHA1, secret, secret_length) < 0) {
        zip_error_set(error, ZIP_ER_INTERNAL, 0);
        free(hmac);
        return NULL;
    }
 
    return hmac;
}

References error(), free(), malloc(), NULL, ZIP_ER_INTERNAL, ZIP_ER_MEMORY, and zip_error_set().

zip_secure_random()

ZIP_EXTERN bool zip_secure_random	(	zip_uint8_t *	buffer,
		zip_uint16_t	length
	)

Definition at line 132 of file zip_crypto_gnutls.c.

                                                            {
    return gnutls_rnd(GNUTLS_RND_KEY, buffer, length) == 0;
}

References length.

Referenced by encrypt_header(), and main().