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cryptodev-builtin: Detect akcipher capability 

Rather than exposing akcipher service/RSA algorithm to virtio crypto
device unconditionally, detect akcipher capability from akcipher
crypto framework. This avoids unsuccessful requests.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Message-Id: <20230301105847.253084-7-pizhenwei@bytedance.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
zhenwei pi 2023-03-01 18:58:41 +08:00 committed by Michael S. Tsirkin
parent 5dcb019810
commit abca0fc329
1 changed files with 15 additions and 3 deletions
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18
backends/cryptodev-builtin.c
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@ -59,6 +59,19 @@ struct CryptoDevBackendBuiltin {
CryptoDevBackendBuiltinSession *sessions[MAX_NUM_SESSIONS];
};
static void cryptodev_builtin_init_akcipher(CryptoDevBackend *backend)
{
QCryptoAkCipherOptions opts;
opts.alg = QCRYPTO_AKCIPHER_ALG_RSA;
opts.u.rsa.padding_alg = QCRYPTO_RSA_PADDING_ALG_RAW;
if (qcrypto_akcipher_supports(&opts)) {
backend->conf.crypto_services |=
(1u << QCRYPTODEV_BACKEND_SERVICE_AKCIPHER);
backend->conf.akcipher_algo = 1u << VIRTIO_CRYPTO_AKCIPHER_RSA;
}
}
static void cryptodev_builtin_init(
CryptoDevBackend *backend, Error **errp)
{
@ -81,11 +94,9 @@ static void cryptodev_builtin_init(
backend->conf.crypto_services =
1u << QCRYPTODEV_BACKEND_SERVICE_CIPHER |
1u << QCRYPTODEV_BACKEND_SERVICE_HASH |
1u << QCRYPTODEV_BACKEND_SERVICE_MAC |
1u << QCRYPTODEV_BACKEND_SERVICE_AKCIPHER;
1u << QCRYPTODEV_BACKEND_SERVICE_MAC;
backend->conf.cipher_algo_l = 1u << VIRTIO_CRYPTO_CIPHER_AES_CBC;
backend->conf.hash_algo = 1u << VIRTIO_CRYPTO_HASH_SHA1;
backend->conf.akcipher_algo = 1u << VIRTIO_CRYPTO_AKCIPHER_RSA;
/*
* Set the Maximum length of crypto request.
* Why this value? Just avoid to overflow when
@ -94,6 +105,7 @@ static void cryptodev_builtin_init(
backend->conf.max_size = LONG_MAX - sizeof(CryptoDevBackendOpInfo);
backend->conf.max_cipher_key_len = CRYPTODEV_BUITLIN_MAX_CIPHER_KEY_LEN;
backend->conf.max_auth_key_len = CRYPTODEV_BUITLIN_MAX_AUTH_KEY_LEN;
cryptodev_builtin_init_akcipher(backend);
cryptodev_backend_set_ready(backend, true);
}