virtio-crypto: introduce akcipher service

Introduce asymmetric service definition, asymmetric operations and
several well known algorithms.

Co-developed-by: lei he <[e-mail]>
Signed-off-by: lei he <[e-mail]>
Signed-off-by: zhenwei pi <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Michael S. Tsirkin <[e-mail]>
Reviewed-by: Gonglei <[e-mail]>

include/uapi/linux/virtio_crypto.h

···
 #define VIRTIO_CRYPTO_SERVICE_HASH   1
 #define VIRTIO_CRYPTO_SERVICE_MAC    2
 #define VIRTIO_CRYPTO_SERVICE_AEAD   3
+#define VIRTIO_CRYPTO_SERVICE_AKCIPHER 4
 
 #define VIRTIO_CRYPTO_OPCODE(service, op)   (((service) << 8) | (op))
 
···
 	   VIRTIO_CRYPTO_OPCODE(VIRTIO_CRYPTO_SERVICE_AEAD, 0x02)
 #define VIRTIO_CRYPTO_AEAD_DESTROY_SESSION \
 	   VIRTIO_CRYPTO_OPCODE(VIRTIO_CRYPTO_SERVICE_AEAD, 0x03)
+#define VIRTIO_CRYPTO_AKCIPHER_CREATE_SESSION \
+	   VIRTIO_CRYPTO_OPCODE(VIRTIO_CRYPTO_SERVICE_AKCIPHER, 0x04)
+#define VIRTIO_CRYPTO_AKCIPHER_DESTROY_SESSION \
+	   VIRTIO_CRYPTO_OPCODE(VIRTIO_CRYPTO_SERVICE_AKCIPHER, 0x05)
 	__le32 opcode;
 	__le32 algo;
 	__le32 flag;
···
 	__u8 padding[32];
 };
 
+struct virtio_crypto_rsa_session_para {
+#define VIRTIO_CRYPTO_RSA_RAW_PADDING   0
+#define VIRTIO_CRYPTO_RSA_PKCS1_PADDING 1
+	__le32 padding_algo;
+
+#define VIRTIO_CRYPTO_RSA_NO_HASH   0
+#define VIRTIO_CRYPTO_RSA_MD2       1
+#define VIRTIO_CRYPTO_RSA_MD3       2
+#define VIRTIO_CRYPTO_RSA_MD4       3
+#define VIRTIO_CRYPTO_RSA_MD5       4
+#define VIRTIO_CRYPTO_RSA_SHA1      5
+#define VIRTIO_CRYPTO_RSA_SHA256    6
+#define VIRTIO_CRYPTO_RSA_SHA384    7
+#define VIRTIO_CRYPTO_RSA_SHA512    8
+#define VIRTIO_CRYPTO_RSA_SHA224    9
+	__le32 hash_algo;
+};
+
+struct virtio_crypto_ecdsa_session_para {
+#define VIRTIO_CRYPTO_CURVE_UNKNOWN   0
+#define VIRTIO_CRYPTO_CURVE_NIST_P192 1
+#define VIRTIO_CRYPTO_CURVE_NIST_P224 2
+#define VIRTIO_CRYPTO_CURVE_NIST_P256 3
+#define VIRTIO_CRYPTO_CURVE_NIST_P384 4
+#define VIRTIO_CRYPTO_CURVE_NIST_P521 5
+	__le32 curve_id;
+	__le32 padding;
+};
+
+struct virtio_crypto_akcipher_session_para {
+#define VIRTIO_CRYPTO_NO_AKCIPHER    0
+#define VIRTIO_CRYPTO_AKCIPHER_RSA   1
+#define VIRTIO_CRYPTO_AKCIPHER_DSA   2
+#define VIRTIO_CRYPTO_AKCIPHER_ECDSA 3
+	__le32 algo;
+
+#define VIRTIO_CRYPTO_AKCIPHER_KEY_TYPE_PUBLIC  1
+#define VIRTIO_CRYPTO_AKCIPHER_KEY_TYPE_PRIVATE 2
+	__le32 keytype;
+	__le32 keylen;
+
+	union {
+		struct virtio_crypto_rsa_session_para rsa;
+		struct virtio_crypto_ecdsa_session_para ecdsa;
+	} u;
+};
+
+struct virtio_crypto_akcipher_create_session_req {
+	struct virtio_crypto_akcipher_session_para para;
+	__u8 padding[36];
+};
+
 struct virtio_crypto_alg_chain_session_para {
 #define VIRTIO_CRYPTO_SYM_ALG_CHAIN_ORDER_HASH_THEN_CIPHER  1
 #define VIRTIO_CRYPTO_SYM_ALG_CHAIN_ORDER_CIPHER_THEN_HASH  2
···
 			mac_create_session;
 		struct virtio_crypto_aead_create_session_req
 			aead_create_session;
+		struct virtio_crypto_akcipher_create_session_req
+			akcipher_create_session;
 		struct virtio_crypto_destroy_session_req
 			destroy_session;
 		__u8 padding[56];
···
 	VIRTIO_CRYPTO_OPCODE(VIRTIO_CRYPTO_SERVICE_AEAD, 0x00)
 #define VIRTIO_CRYPTO_AEAD_DECRYPT \
 	VIRTIO_CRYPTO_OPCODE(VIRTIO_CRYPTO_SERVICE_AEAD, 0x01)
+#define VIRTIO_CRYPTO_AKCIPHER_ENCRYPT \
+	VIRTIO_CRYPTO_OPCODE(VIRTIO_CRYPTO_SERVICE_AKCIPHER, 0x00)
+#define VIRTIO_CRYPTO_AKCIPHER_DECRYPT \
+	VIRTIO_CRYPTO_OPCODE(VIRTIO_CRYPTO_SERVICE_AKCIPHER, 0x01)
+#define VIRTIO_CRYPTO_AKCIPHER_SIGN \
+	VIRTIO_CRYPTO_OPCODE(VIRTIO_CRYPTO_SERVICE_AKCIPHER, 0x02)
+#define VIRTIO_CRYPTO_AKCIPHER_VERIFY \
+	VIRTIO_CRYPTO_OPCODE(VIRTIO_CRYPTO_SERVICE_AKCIPHER, 0x03)
 	__le32 opcode;
 	/* algo should be service-specific algorithms */
 	__le32 algo;
···
 	__u8 padding[32];
 };
 
+struct virtio_crypto_akcipher_para {
+	__le32 src_data_len;
+	__le32 dst_data_len;
+};
+
+struct virtio_crypto_akcipher_data_req {
+	struct virtio_crypto_akcipher_para para;
+	__u8 padding[40];
+};
+
 /* The request of the data virtqueue's packet */
 struct virtio_crypto_op_data_req {
 	struct virtio_crypto_op_header header;
···
 		struct virtio_crypto_hash_data_req hash_req;
 		struct virtio_crypto_mac_data_req mac_req;
 		struct virtio_crypto_aead_data_req aead_req;
+		struct virtio_crypto_akcipher_data_req akcipher_req;
 		__u8 padding[48];
 	} u;
 };
···
 #define VIRTIO_CRYPTO_NOTSUPP   3
 #define VIRTIO_CRYPTO_INVSESS   4 /* Invalid session id */
 #define VIRTIO_CRYPTO_NOSPC     5 /* no free session ID */
+#define VIRTIO_CRYPTO_KEY_REJECTED 6 /* Signature verification failed */
 
 /* The accelerator hardware is ready */
 #define VIRTIO_CRYPTO_S_HW_READY  (1 << 0)
···
 	__le32 max_cipher_key_len;
 	/* Maximum length of authenticated key */
 	__le32 max_auth_key_len;
-	__le32 reserve;
+	__le32 akcipher_algo;
 	/* Maximum size of each crypto request's content */
 	__le64 max_size;
 };