crypto: Implement RSA algorithm by hogweed

Implement RSA algorithm by hogweed from nettle. Thus QEMU supports
a 'real' RSA backend to handle request from guest side. It's
important to test RSA offload case without OS & hardware requirement.

Signed-off-by: lei he <helei.sig11@bytedance.com>
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

1 files changed, 44 insertions, 0 deletions

diff --git a/crypto/rsakey.c b/crypto/rsakey.c
new file mode 100644
index 0000000000..cc40e072f0
--- /dev/null
+++ b/crypto/rsakey.c
@@ -0,0 +1,44 @@
+/*
+ * QEMU Crypto RSA key parser
+ *
+ * Copyright (c) 2022 Bytedance
+ * Author: lei he <helei.sig11@bytedance.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "rsakey.h"
+
+void qcrypto_akcipher_rsakey_free(QCryptoAkCipherRSAKey *rsa_key)
+{
+    if (!rsa_key) {
+        return;
+    }
+    g_free(rsa_key->n.data);
+    g_free(rsa_key->e.data);
+    g_free(rsa_key->d.data);
+    g_free(rsa_key->p.data);
+    g_free(rsa_key->q.data);
+    g_free(rsa_key->dp.data);
+    g_free(rsa_key->dq.data);
+    g_free(rsa_key->u.data);
+    g_free(rsa_key);
+}
+
+#if defined(CONFIG_NETTLE) && defined(CONFIG_HOGWEED)
+#include "rsakey-nettle.c.inc"
+#else
+#include "rsakey-builtin.c.inc"
+#endif