[PATCH v3 3/4] blk-crypto: Add LEA-256-XTS blk-crypto support

[Dongsoo Lee <letrhee@nsr.re.kr>]

Add LEA-256-XTS blk-crypto support

LEA is a 128-bit block cipher developed by South Korea.

LEA is a Korean national standard (KS X 3246) and included in the
ISO/IEC 29192-2:2019 standard (Information security - Lightweight
cryptography - Part 2: Block ciphers).

Enable the LEA to be used in block inline encryption. This can be
used via blk-crypto-fallback, when using the "inlinecrypt" mount
option in fscrypt.

Signed-off-by: Dongsoo Lee <letrhee@nsr.re.kr>
---
 block/blk-crypto.c         | 6 ++++++
 include/linux/blk-crypto.h | 1 +
 2 files changed, 7 insertions(+)

diff --git a/block/blk-crypto.c b/block/blk-crypto.c
index 4d760b092deb..b847706bbc59 100644
--- a/block/blk-crypto.c
+++ b/block/blk-crypto.c
@@ -43,6 +43,12 @@ const struct blk_crypto_mode blk_crypto_modes[] = {
 		.keysize = 32,
 		.ivsize = 16,
 	},
+	[BLK_ENCRYPTION_MODE_LEA_256_XTS] = {
+		.name = "LEA-256-XTS",
+		.cipher_str = "xts(lea)",
+		.keysize = 64,
+		.ivsize = 16,
+	},
 };
 
 /*
diff --git a/include/linux/blk-crypto.h b/include/linux/blk-crypto.h
index 5e5822c18ee4..b6bf2a5c58ed 100644
--- a/include/linux/blk-crypto.h
+++ b/include/linux/blk-crypto.h
@@ -14,6 +14,7 @@ enum blk_crypto_mode_num {
 	BLK_ENCRYPTION_MODE_AES_128_CBC_ESSIV,
 	BLK_ENCRYPTION_MODE_ADIANTUM,
 	BLK_ENCRYPTION_MODE_SM4_XTS,
+	BLK_ENCRYPTION_MODE_LEA_256_XTS,
 	BLK_ENCRYPTION_MODE_MAX,
 };
 
-- 
2.34.1