Subject: [PATCH v2 02/11] crypto: blake2b - define shash_alg structs using macros

From: Eric Biggers <[email-masked]>
Date: Thu, 17 Dec 2020 14:21:29 -0800

From: Eric Biggers <[email-masked]>

The shash_alg structs for the four variants of BLAKE2b are identical
except for the algorithm name, driver name, and digest size.  So, avoid
code duplication by using a macro to define these structs.

Reviewed-by: David Sterba <[email-masked]>
Signed-off-by: Eric Biggers <[email-masked]>
---
 crypto/blake2b_generic.c | 82 ++++++++++++----------------------------
 1 file changed, 25 insertions(+), 57 deletions(-)

diff --git a/crypto/blake2b_generic.c b/crypto/blake2b_generic.c
index 83942f511075e..0e38e3e48297c 100644
--- a/crypto/blake2b_generic.c
+++ b/crypto/blake2b_generic.c
@@ -236,64 +236,32 @@ static int blake2b_final(struct shash_desc *desc, u8 *out)
 	return 0;
 }
 
-static struct shash_alg blake2b_algs[] = {
-	{
-		.base.cra_name		= "blake2b-160",
-		.base.cra_driver_name	= "blake2b-160-generic",
-		.base.cra_priority	= 100,
-		.base.cra_flags		= CRYPTO_ALG_OPTIONAL_KEY,
-		.base.cra_blocksize	= BLAKE2B_BLOCK_SIZE,
-		.base.cra_ctxsize	= sizeof(struct blake2b_tfm_ctx),
-		.base.cra_module	= THIS_MODULE,
-		.digestsize		= BLAKE2B_160_HASH_SIZE,
-		.setkey			= blake2b_setkey,
-		.init			= blake2b_init,
-		.update			= blake2b_update,
-		.final			= blake2b_final,
-		.descsize		= sizeof(struct blake2b_state),
-	}, {
-		.base.cra_name		= "blake2b-256",
-		.base.cra_driver_name	= "blake2b-256-generic",
-		.base.cra_priority	= 100,
-		.base.cra_flags		= CRYPTO_ALG_OPTIONAL_KEY,
-		.base.cra_blocksize	= BLAKE2B_BLOCK_SIZE,
-		.base.cra_ctxsize	= sizeof(struct blake2b_tfm_ctx),
-		.base.cra_module	= THIS_MODULE,
-		.digestsize		= BLAKE2B_256_HASH_SIZE,
-		.setkey			= blake2b_setkey,
-		.init			= blake2b_init,
-		.update			= blake2b_update,
-		.final			= blake2b_final,
-		.descsize		= sizeof(struct blake2b_state),
-	}, {
-		.base.cra_name		= "blake2b-384",
-		.base.cra_driver_name	= "blake2b-384-generic",
-		.base.cra_priority	= 100,
-		.base.cra_flags		= CRYPTO_ALG_OPTIONAL_KEY,
-		.base.cra_blocksize	= BLAKE2B_BLOCK_SIZE,
-		.base.cra_ctxsize	= sizeof(struct blake2b_tfm_ctx),
-		.base.cra_module	= THIS_MODULE,
-		.digestsize		= BLAKE2B_384_HASH_SIZE,
-		.setkey			= blake2b_setkey,
-		.init			= blake2b_init,
-		.update			= blake2b_update,
-		.final			= blake2b_final,
-		.descsize		= sizeof(struct blake2b_state),
-	}, {
-		.base.cra_name		= "blake2b-512",
-		.base.cra_driver_name	= "blake2b-512-generic",
-		.base.cra_priority	= 100,
-		.base.cra_flags		= CRYPTO_ALG_OPTIONAL_KEY,
-		.base.cra_blocksize	= BLAKE2B_BLOCK_SIZE,
-		.base.cra_ctxsize	= sizeof(struct blake2b_tfm_ctx),
-		.base.cra_module	= THIS_MODULE,
-		.digestsize		= BLAKE2B_512_HASH_SIZE,
-		.setkey			= blake2b_setkey,
-		.init			= blake2b_init,
-		.update			= blake2b_update,
-		.final			= blake2b_final,
-		.descsize		= sizeof(struct blake2b_state),
+#define BLAKE2B_ALG(name, driver_name, digest_size)			\
+	{								\
+		.base.cra_name		= name,				\
+		.base.cra_driver_name	= driver_name,			\
+		.base.cra_priority	= 100,				\
+		.base.cra_flags		= CRYPTO_ALG_OPTIONAL_KEY,	\
+		.base.cra_blocksize	= BLAKE2B_BLOCK_SIZE,		\
+		.base.cra_ctxsize	= sizeof(struct blake2b_tfm_ctx), \
+		.base.cra_module	= THIS_MODULE,			\
+		.digestsize		= digest_size,			\
+		.setkey			= blake2b_setkey,		\
+		.init			= blake2b_init,			\
+		.update			= blake2b_update,		\
+		.final			= blake2b_final,		\
+		.descsize		= sizeof(struct blake2b_state),	\
 	}
+
+static struct shash_alg blake2b_algs[] = {
+	BLAKE2B_ALG("blake2b-160", "blake2b-160-generic",
+		    BLAKE2B_160_HASH_SIZE),
+	BLAKE2B_ALG("blake2b-256", "blake2b-256-generic",
+		    BLAKE2B_256_HASH_SIZE),
+	BLAKE2B_ALG("blake2b-384", "blake2b-384-generic",
+		    BLAKE2B_384_HASH_SIZE),
+	BLAKE2B_ALG("blake2b-512", "blake2b-512-generic",
+		    BLAKE2B_512_HASH_SIZE),
 };
 
 static int __init blake2b_mod_init(void)
-- 
2.29.2

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