net/tls: Describe ciphers sizes by const structs

Introduce cipher sizes descriptor. It helps reducing the amount of code
duplications and repeated switch/cases that assigns the proper sizes
according to the cipher type.

Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Gal Pressman <gal@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/include/net/tls.h b/include/net/tls.h
index cb205f9..154949c 100644 (file)
--- a/include/net/tls.h
+++ b/include/net/tls.h
@@ -51,6 +51,16 @@
 
 struct tls_rec;
 
+struct tls_cipher_size_desc {
+       unsigned int iv;
+       unsigned int key;
+       unsigned int salt;
+       unsigned int tag;
+       unsigned int rec_seq;
+};
+
+extern const struct tls_cipher_size_desc tls_cipher_size_desc[];
+
 /* Maximum data size carried in a TLS record */
 #define TLS_MAX_PAYLOAD_SIZE           ((size_t)1 << 14)
 

diff --git a/net/tls/tls_main.c b/net/tls/tls_main.c
index 08ddf9d..5cc6911 100644 (file)
--- a/net/tls/tls_main.c
+++ b/net/tls/tls_main.c
@@ -58,6 +58,23 @@ enum {
        TLS_NUM_PROTS,
 };
 
+#define CIPHER_SIZE_DESC(cipher) [cipher] = { \
+       .iv = cipher ## _IV_SIZE, \
+       .key = cipher ## _KEY_SIZE, \
+       .salt = cipher ## _SALT_SIZE, \
+       .tag = cipher ## _TAG_SIZE, \
+       .rec_seq = cipher ## _REC_SEQ_SIZE, \
+}
+
+const struct tls_cipher_size_desc tls_cipher_size_desc[] = {
+       CIPHER_SIZE_DESC(TLS_CIPHER_AES_GCM_128),
+       CIPHER_SIZE_DESC(TLS_CIPHER_AES_GCM_256),
+       CIPHER_SIZE_DESC(TLS_CIPHER_AES_CCM_128),
+       CIPHER_SIZE_DESC(TLS_CIPHER_CHACHA20_POLY1305),
+       CIPHER_SIZE_DESC(TLS_CIPHER_SM4_GCM),
+       CIPHER_SIZE_DESC(TLS_CIPHER_SM4_CCM),
+};
+
 static const struct proto *saved_tcpv6_prot;
 static DEFINE_MUTEX(tcpv6_prot_mutex);
 static const struct proto *saved_tcpv4_prot;