From: "Longpeng(Mike)" <longpe...@huawei.com>
Extracts qcrypto_cipher_ctx_new() from qcrypto_cipher_new() for
gcrypt-backend impls.
Reviewed-by: Daniel P. Berrange <berra...@redhat.com>
Reviewed-by: Gonglei <arei.gong...@huawei.com>
Signed-off-by: Longpeng(Mike) <longpe...@huawei.com>
---
crypto/cipher-gcrypt.c | 50 +++++++++++++++++++++++++++++++++-----------------
1 file changed, 33 insertions(+), 17 deletions(-)
diff --git a/crypto/cipher-gcrypt.c b/crypto/cipher-gcrypt.c
index 0ecffa2..4939386 100644
--- a/crypto/cipher-gcrypt.c
+++ b/crypto/cipher-gcrypt.c
@@ -80,12 +80,12 @@ static void gcrypt_cipher_free_ctx(QCryptoCipherGcrypt *ctx,
}
-QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg,
- QCryptoCipherMode mode,
- const uint8_t *key, size_t nkey,
- Error **errp)
+static QCryptoCipherGcrypt *qcrypto_cipher_ctx_new(QCryptoCipherAlgorithm alg,
+ QCryptoCipherMode mode,
+ const uint8_t *key,
+ size_t nkey,
+ Error **errp)
{
- QCryptoCipher *cipher;
QCryptoCipherGcrypt *ctx;
gcry_error_t err;
int gcryalg, gcrymode;
@@ -162,10 +162,6 @@ QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm
alg,
return NULL;
}
- cipher = g_new0(QCryptoCipher, 1);
- cipher->alg = alg;
- cipher->mode = mode;
-
ctx = g_new0(QCryptoCipherGcrypt, 1);
err = gcry_cipher_open(&ctx->handle, gcryalg, gcrymode, 0);
@@ -174,7 +170,7 @@ QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm
alg,
gcry_strerror(err));
goto error;
}
- if (cipher->mode == QCRYPTO_CIPHER_MODE_XTS) {
+ if (mode == QCRYPTO_CIPHER_MODE_XTS) {
err = gcry_cipher_open(&ctx->tweakhandle, gcryalg, gcrymode, 0);
if (err != 0) {
error_setg(errp, "Cannot initialize cipher: %s",
@@ -183,7 +179,7 @@ QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm
alg,
}
}
- if (cipher->alg == QCRYPTO_CIPHER_ALG_DES_RFB) {
+ if (alg == QCRYPTO_CIPHER_ALG_DES_RFB) {
/* We're using standard DES cipher from gcrypt, so we need
* to munge the key so that the results are the same as the
* bizarre RFB variant of DES :-)
@@ -193,7 +189,7 @@ QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm
alg,
g_free(rfbkey);
ctx->blocksize = 8;
} else {
- if (cipher->mode == QCRYPTO_CIPHER_MODE_XTS) {
+ if (mode == QCRYPTO_CIPHER_MODE_XTS) {
nkey /= 2;
err = gcry_cipher_setkey(ctx->handle, key, nkey);
if (err != 0) {
@@ -210,7 +206,7 @@ QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm
alg,
gcry_strerror(err));
goto error;
}
- switch (cipher->alg) {
+ switch (alg) {
case QCRYPTO_CIPHER_ALG_AES_128:
case QCRYPTO_CIPHER_ALG_AES_192:
case QCRYPTO_CIPHER_ALG_AES_256:
@@ -230,7 +226,7 @@ QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm
alg,
}
}
- if (cipher->mode == QCRYPTO_CIPHER_MODE_XTS) {
+ if (mode == QCRYPTO_CIPHER_MODE_XTS) {
if (ctx->blocksize != XTS_BLOCK_SIZE) {
error_setg(errp,
"Cipher block size %zu must equal XTS block size %d",
@@ -240,12 +236,10 @@ QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm
alg,
ctx->iv = g_new0(uint8_t, ctx->blocksize);
}
- cipher->opaque = ctx;
- return cipher;
+ return ctx;
error:
gcrypt_cipher_free_ctx(ctx, mode);
- g_free(cipher);
return NULL;
}
@@ -385,3 +379,25 @@ int qcrypto_cipher_setiv(QCryptoCipher *cipher,
return 0;
}
+
+
+QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg,
+ QCryptoCipherMode mode,
+ const uint8_t *key, size_t nkey,
+ Error **errp)
+{
+ QCryptoCipher *cipher;
+ QCryptoCipherGcrypt *ctx;
+
+ ctx = qcrypto_cipher_ctx_new(alg, mode, key, nkey, errp);
+ if (!ctx) {
+ return NULL;
+ }
+
+ cipher = g_new0(QCryptoCipher, 1);
+ cipher->alg = alg;
+ cipher->mode = mode;
+ cipher->opaque = ctx;
+
+ return cipher;
+}
--
1.8.3.1
