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crypto: cipher: introduce context free function

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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
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31
crypto/cipher-gcrypt.c
View File

@ -64,6 +64,22 @@ struct QCryptoCipherGcrypt {
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,
QCryptoCipherMode mode,
const uint8_t *key, size_t nkey,
@ -228,11 +244,7 @@ QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg,
return cipher;
error:
gcry_cipher_close(ctx->handle);
if (cipher->mode == QCRYPTO_CIPHER_MODE_XTS) {
gcry_cipher_close(ctx->tweakhandle);
}
g_free(ctx);
gcrypt_cipher_free_ctx(ctx, mode);
g_free(cipher);
return NULL;
}
@ -240,17 +252,10 @@ QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg,
void qcrypto_cipher_free(QCryptoCipher *cipher)
{
QCryptoCipherGcrypt *ctx;
if (!cipher) {
return;
}
ctx = cipher->opaque;
gcry_cipher_close(ctx->handle);
if (cipher->mode == QCRYPTO_CIPHER_MODE_XTS) {
gcry_cipher_close(ctx->tweakhandle);
}
g_free(ctx->iv);
g_free(ctx);
gcrypt_cipher_free_ctx(cipher->opaque, cipher->mode);
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,
QCryptoCipherMode mode,
const uint8_t *key, size_t nkey,
@ -440,10 +453,7 @@ void qcrypto_cipher_free(QCryptoCipher *cipher)
}
ctx = cipher->opaque;
g_free(ctx->iv);
g_free(ctx->ctx);
g_free(ctx->ctx_tweak);
g_free(ctx);
nettle_cipher_free_ctx(ctx);
g_free(cipher);
}