diff options
| author | Gonglei <arei.gonglei@huawei.com> | 2016-09-26 17:23:22 +0800 |
|---|---|---|
| committer | Daniel P. Berrange <berrange@redhat.com> | 2016-10-19 10:09:24 +0100 |
| commit | 3c28292f390f642bbb3dba0949ecf36aaf7be0d6 (patch) | |
| tree | 21c65cff1327d46cac536b32c671b6bcdd696715 /include/crypto/cipher.h | |
| parent | f844836ddccf3dbcba142128da5dd8ee618f3e91 (diff) | |
crypto: add CTR mode support
Introduce CTR mode support for the cipher APIs.
CTR mode uses a counter rather than a traditional IV.
The counter has additional properties, including a nonce
and initial counter block. We reuse the ctx->iv as
the counter for conveniences.
Both libgcrypt and nettle are support CTR mode, the
cipher-builtin doesn't support yet.
Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Diffstat (limited to 'include/crypto/cipher.h')
| -rw-r--r-- | include/crypto/cipher.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/crypto/cipher.h b/include/crypto/cipher.h index 97638e7bbf..bec9f412b0 100644 --- a/include/crypto/cipher.h +++ b/include/crypto/cipher.h @@ -215,16 +215,16 @@ int qcrypto_cipher_decrypt(QCryptoCipher *cipher, /** * qcrypto_cipher_setiv: * @cipher: the cipher object - * @iv: the initialization vector bytes + * @iv: the initialization vector or counter (CTR mode) bytes * @niv: the length of @iv * @errpr: pointer to a NULL-initialized error object * * If the @cipher object is setup to use a mode that requires - * initialization vectors, this sets the initialization vector + * initialization vectors or counter, this sets the @niv * bytes. The @iv data should have the same length as the * cipher key used when originally constructing the cipher * object. It is an error to set an initialization vector - * if the cipher mode does not require one. + * or counter if the cipher mode does not require one. * * Returns: 0 on success, -1 on error */ |