motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-31 05:51:53 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

crypto: cipher: introduce context free function

Browse source 
Refactors the qcrypto_cipher_free(), splits it into two parts. One
is gcrypt/nettle__cipher_free_ctx() to free the special context.

This makes code more clear, what's more, it would be used by the
later patch.

Reviewed-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Longpeng(Mike) <longpeng2@huawei.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
This commit is contained in:
Longpeng(Mike) 2017-07-14 14:03:54 -04:00 • committed by Daniel P. Berrange
parent 6887dc6700
commit cc5eff0186
2 changed files with 32 additions and 17 deletions
Download patch file Download diff file Expand all files Collapse all files

31
crypto/cipher-gcrypt.c
View file

@ -64,6 +64,22 @@ struct QCryptoCipherGcrypt {
uint8_t *iv; uint8_t *iv;
}; };
static void gcrypt_cipher_free_ctx(QCryptoCipherGcrypt *ctx,
QCryptoCipherMode mode)
{
if (!ctx) {
return;
}
gcry_cipher_close(ctx->handle);
if (mode == QCRYPTO_CIPHER_MODE_XTS) {
gcry_cipher_close(ctx->tweakhandle);
}
g_free(ctx->iv);
g_free(ctx);
}
QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg, QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg,
QCryptoCipherMode mode, QCryptoCipherMode mode,
const uint8_t *key, size_t nkey, const uint8_t *key, size_t nkey,
@ -228,11 +244,7 @@ QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg,
return cipher; return cipher;
error: error:
gcry_cipher_close(ctx->handle); gcrypt_cipher_free_ctx(ctx, mode);
if (cipher->mode == QCRYPTO_CIPHER_MODE_XTS) {
gcry_cipher_close(ctx->tweakhandle);
}
g_free(ctx);
g_free(cipher); g_free(cipher);
return NULL; return NULL;
} }
@ -240,17 +252,10 @@ QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg,
void qcrypto_cipher_free(QCryptoCipher *cipher) void qcrypto_cipher_free(QCryptoCipher *cipher)
{ {
QCryptoCipherGcrypt *ctx;
if (!cipher) { if (!cipher) {
return; return;
} }
ctx = cipher->opaque; gcrypt_cipher_free_ctx(cipher->opaque, cipher->mode);
gcry_cipher_close(ctx->handle);
if (cipher->mode == QCRYPTO_CIPHER_MODE_XTS) {
gcry_cipher_close(ctx->tweakhandle);
}
g_free(ctx->iv);
g_free(ctx);
g_free(cipher); g_free(cipher);
} }

18
crypto/cipher-nettle.c
View file

@ -249,6 +249,19 @@ bool qcrypto_cipher_supports(QCryptoCipherAlgorithm alg,
} }
static void nettle_cipher_free_ctx(QCryptoCipherNettle *ctx)
{
if (!ctx) {
return;
}
g_free(ctx->iv);
g_free(ctx->ctx);
g_free(ctx->ctx_tweak);
g_free(ctx);
}
QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg, QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg,
QCryptoCipherMode mode, QCryptoCipherMode mode,
const uint8_t *key, size_t nkey, const uint8_t *key, size_t nkey,
@ -440,10 +453,7 @@ void qcrypto_cipher_free(QCryptoCipher *cipher)
} }
ctx = cipher->opaque; ctx = cipher->opaque;
g_free(ctx->iv); nettle_cipher_free_ctx(ctx);
g_free(ctx->ctx);
g_free(ctx->ctx_tweak);
g_free(ctx);
g_free(cipher); g_free(cipher);
} }