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authorLongpeng(Mike) <longpeng2@huawei.com>2017-07-14 14:03:57 -0400
committerDaniel P. Berrange <berrange@redhat.com>2017-07-19 10:11:04 +0100
commitd962c6266c5361f62f16b3c7b1c5b587502eaf77 (patch)
tree0f3d96e2b5da0da32d8efe804147a207ce9aa1db /crypto
parenteabe6c58ac6e10a711885b87ded6df81f868a867 (diff)
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crypto: cipher: introduce qcrypto_cipher_ctx_new for builtin-backend
Extracts qcrypto_cipher_ctx_new() from qcrypto_cipher_new() for builtin-backend impls. Reviewed-by: Gonglei <arei.gonglei@huawei.com> Signed-off-by: Longpeng(Mike) <longpeng2@huawei.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/cipher-builtin.c101
1 files changed, 55 insertions, 46 deletions
diff --git a/crypto/cipher-builtin.c b/crypto/cipher-builtin.c
index b4bc2b9..4ecd15e 100644
--- a/crypto/cipher-builtin.c
+++ b/crypto/cipher-builtin.c
@@ -235,23 +235,24 @@ static int qcrypto_cipher_setiv_aes(QCryptoCipher *cipher,
-static int qcrypto_cipher_init_aes(QCryptoCipher *cipher,
- const uint8_t *key, size_t nkey,
- Error **errp)
+static QCryptoCipherBuiltin *
+qcrypto_cipher_init_aes(QCryptoCipherMode mode,
+ const uint8_t *key, size_t nkey,
+ Error **errp)
{
QCryptoCipherBuiltin *ctxt;
- if (cipher->mode != QCRYPTO_CIPHER_MODE_CBC &&
- cipher->mode != QCRYPTO_CIPHER_MODE_ECB &&
- cipher->mode != QCRYPTO_CIPHER_MODE_XTS) {
+ if (mode != QCRYPTO_CIPHER_MODE_CBC &&
+ mode != QCRYPTO_CIPHER_MODE_ECB &&
+ mode != QCRYPTO_CIPHER_MODE_XTS) {
error_setg(errp, "Unsupported cipher mode %s",
- QCryptoCipherMode_lookup[cipher->mode]);
- return -1;
+ QCryptoCipherMode_lookup[mode]);
+ return NULL;
}
ctxt = g_new0(QCryptoCipherBuiltin, 1);
- if (cipher->mode == QCRYPTO_CIPHER_MODE_XTS) {
+ if (mode == QCRYPTO_CIPHER_MODE_XTS) {
if (AES_set_encrypt_key(key, nkey * 4, &ctxt->state.aes.key.enc) != 0) {
error_setg(errp, "Failed to set encryption key");
goto error;
@@ -291,13 +292,11 @@ static int qcrypto_cipher_init_aes(QCryptoCipher *cipher,
ctxt->encrypt = qcrypto_cipher_encrypt_aes;
ctxt->decrypt = qcrypto_cipher_decrypt_aes;
- cipher->opaque = ctxt;
-
- return 0;
+ return ctxt;
error:
g_free(ctxt);
- return -1;
+ return NULL;
}
@@ -370,16 +369,17 @@ static int qcrypto_cipher_setiv_des_rfb(QCryptoCipher *cipher,
}
-static int qcrypto_cipher_init_des_rfb(QCryptoCipher *cipher,
- const uint8_t *key, size_t nkey,
- Error **errp)
+static QCryptoCipherBuiltin *
+qcrypto_cipher_init_des_rfb(QCryptoCipherMode mode,
+ const uint8_t *key, size_t nkey,
+ Error **errp)
{
QCryptoCipherBuiltin *ctxt;
- if (cipher->mode != QCRYPTO_CIPHER_MODE_ECB) {
+ if (mode != QCRYPTO_CIPHER_MODE_ECB) {
error_setg(errp, "Unsupported cipher mode %s",
- QCryptoCipherMode_lookup[cipher->mode]);
- return -1;
+ QCryptoCipherMode_lookup[mode]);
+ return NULL;
}
ctxt = g_new0(QCryptoCipherBuiltin, 1);
@@ -394,9 +394,7 @@ static int qcrypto_cipher_init_des_rfb(QCryptoCipher *cipher,
ctxt->encrypt = qcrypto_cipher_encrypt_des_rfb;
ctxt->decrypt = qcrypto_cipher_decrypt_des_rfb;
- cipher->opaque = ctxt;
-
- return 0;
+ return ctxt;
}
@@ -426,12 +424,13 @@ bool qcrypto_cipher_supports(QCryptoCipherAlgorithm alg,
}
-QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg,
- QCryptoCipherMode mode,
- const uint8_t *key, size_t nkey,
- Error **errp)
+static QCryptoCipherBuiltin *qcrypto_cipher_ctx_new(QCryptoCipherAlgorithm alg,
+ QCryptoCipherMode mode,
+ const uint8_t *key,
+ size_t nkey,
+ Error **errp)
{
- QCryptoCipher *cipher;
+ QCryptoCipherBuiltin *ctxt;
switch (mode) {
case QCRYPTO_CIPHER_MODE_ECB:
@@ -444,39 +443,27 @@ QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg,
return NULL;
}
- cipher = g_new0(QCryptoCipher, 1);
- cipher->alg = alg;
- cipher->mode = mode;
-
if (!qcrypto_cipher_validate_key_length(alg, mode, nkey, errp)) {
- goto error;
+ return NULL;
}
- switch (cipher->alg) {
+ switch (alg) {
case QCRYPTO_CIPHER_ALG_DES_RFB:
- if (qcrypto_cipher_init_des_rfb(cipher, key, nkey, errp) < 0) {
- goto error;
- }
+ ctxt = qcrypto_cipher_init_des_rfb(mode, key, nkey, errp);
break;
case QCRYPTO_CIPHER_ALG_AES_128:
case QCRYPTO_CIPHER_ALG_AES_192:
case QCRYPTO_CIPHER_ALG_AES_256:
- if (qcrypto_cipher_init_aes(cipher, key, nkey, errp) < 0) {
- goto error;
- }
+ ctxt = qcrypto_cipher_init_aes(mode, key, nkey, errp);
break;
default:
error_setg(errp,
"Unsupported cipher algorithm %s",
- QCryptoCipherAlgorithm_lookup[cipher->alg]);
- goto error;
+ QCryptoCipherAlgorithm_lookup[alg]);
+ return NULL;
}
- return cipher;
-
- error:
- g_free(cipher);
- return NULL;
+ return ctxt;
}
void qcrypto_cipher_free(QCryptoCipher *cipher)
@@ -537,3 +524,25 @@ int qcrypto_cipher_setiv(QCryptoCipher *cipher,
return ctxt->setiv(cipher, iv, niv, errp);
}
+
+
+QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg,
+ QCryptoCipherMode mode,
+ const uint8_t *key, size_t nkey,
+ Error **errp)
+{
+ QCryptoCipher *cipher;
+ QCryptoCipherBuiltin *ctxt;
+
+ ctxt = qcrypto_cipher_ctx_new(alg, mode, key, nkey, errp);
+ if (!ctxt) {
+ return NULL;
+ }
+
+ cipher = g_new0(QCryptoCipher, 1);
+ cipher->alg = alg;
+ cipher->mode = mode;
+ cipher->opaque = ctxt;
+
+ return cipher;
+}