[PATCH v4 2/3] crypto: ti - Add support for MD5 in DTHEv2 Hashing Engine driver

[T Pratham <t-pratham@ti.com>]

Add support for MD5 algorithm in the hashing engine of DTHEv2 hardware
cryptographic engine.

Signed-off-by: T Pratham <t-pratham@ti.com>
---
 drivers/crypto/ti/Kconfig         |  1 +
 drivers/crypto/ti/dthev2-common.h |  1 +
 drivers/crypto/ti/dthev2-hash.c   | 49 +++++++++++++++++++++++++++++++
 3 files changed, 51 insertions(+)

diff --git a/drivers/crypto/ti/Kconfig b/drivers/crypto/ti/Kconfig
index 90af2c7cb1c55..9c2aa50cfbfbe 100644
--- a/drivers/crypto/ti/Kconfig
+++ b/drivers/crypto/ti/Kconfig
@@ -12,6 +12,7 @@ config CRYPTO_DEV_TI_DTHEV2
 	select CRYPTO_CCM
 	select CRYPTO_SHA256
 	select CRYPTO_SHA512
+	select CRYPTO_MD5
 	select SG_SPLIT
 	help
 	  This enables support for the TI DTHE V2 hw cryptography engine
diff --git a/drivers/crypto/ti/dthev2-common.h b/drivers/crypto/ti/dthev2-common.h
index bfe7f2de4415c..24799007ea81f 100644
--- a/drivers/crypto/ti/dthev2-common.h
+++ b/drivers/crypto/ti/dthev2-common.h
@@ -17,6 +17,7 @@
 #include <crypto/internal/aead.h>
 #include <crypto/internal/hash.h>
 #include <crypto/internal/skcipher.h>
+#include <crypto/md5.h>
 #include <crypto/sha2.h>
 
 #include <linux/delay.h>
diff --git a/drivers/crypto/ti/dthev2-hash.c b/drivers/crypto/ti/dthev2-hash.c
index 204637ab72374..4b5df4fdcaa5f 100644
--- a/drivers/crypto/ti/dthev2-hash.c
+++ b/drivers/crypto/ti/dthev2-hash.c
@@ -9,6 +9,7 @@
 #include <crypto/algapi.h>
 #include <crypto/hash.h>
 #include <crypto/internal/hash.h>
+#include <crypto/md5.h>
 #include <crypto/sha2.h>
 
 #include "dthev2-common.h"
@@ -65,6 +66,9 @@ static void dthe_hash_write_zero_message(enum dthe_hash_alg_sel mode, void *dst)
 	case DTHE_HASH_SHA224:
 		memcpy(dst, sha224_zero_message_hash, SHA224_DIGEST_SIZE);
 		break;
+	case DTHE_HASH_MD5:
+		memcpy(dst, md5_zero_message_hash, MD5_DIGEST_SIZE);
+		break;
 	default:
 		break;
 	}
@@ -93,6 +97,9 @@ static enum dthe_hash_alg_sel dthe_hash_get_hash_mode(struct crypto_ahash *tfm)
 	case SHA224_DIGEST_SIZE:
 		hash_mode = DTHE_HASH_SHA224;
 		break;
+	case MD5_DIGEST_SIZE:
+		hash_mode = DTHE_HASH_MD5;
+		break;
 	default:
 		hash_mode = DTHE_HASH_ERR;
 		break;
@@ -114,6 +121,9 @@ static unsigned int dthe_hash_get_phash_size(struct dthe_tfm_ctx *ctx)
 	case DTHE_HASH_SHA224:
 		phash_size = SHA256_DIGEST_SIZE;
 		break;
+	case DTHE_HASH_MD5:
+		phash_size = MD5_DIGEST_SIZE;
+		break;
 	default:
 		break;
 	}
@@ -426,6 +436,10 @@ static const u64 sha512_init_state[SHA512_DIGEST_SIZE / sizeof(u64)] = {
 	SHA512_H4, SHA512_H5, SHA512_H6, SHA512_H7
 };
 
+static const u32 md5_init_state[MD5_DIGEST_SIZE / sizeof(u32)] = {
+	MD5_H0, MD5_H1, MD5_H2, MD5_H3
+};
+
 static const void *dthe_hash_get_init_state(struct dthe_tfm_ctx *ctx)
 {
 	switch (ctx->hash_mode) {
@@ -437,6 +451,8 @@ static const void *dthe_hash_get_init_state(struct dthe_tfm_ctx *ctx)
 		return sha384_init_state;
 	case DTHE_HASH_SHA512:
 		return sha512_init_state;
+	case DTHE_HASH_MD5:
+		return md5_init_state;
 	default:
 		return NULL;
 	}
@@ -618,6 +634,39 @@ static struct ahash_engine_alg hash_algs[] = {
 		},
 		.op.do_one_request = dthe_hash_run,
 	},
+	{
+		.base.init_tfm	= dthe_hash_init_tfm,
+		.base.init	= dthe_hash_init,
+		.base.update	= dthe_hash_update,
+		.base.final	= dthe_hash_final,
+		.base.finup	= dthe_hash_finup,
+		.base.digest	= dthe_hash_digest,
+		.base.export	= dthe_hash_export,
+		.base.import	= dthe_hash_import,
+		.base.halg	= {
+			.digestsize = MD5_DIGEST_SIZE,
+			.statesize = sizeof(struct dthe_hash_req_ctx),
+			.base = {
+				.cra_name	 = "md5",
+				.cra_driver_name = "md5-dthev2",
+				.cra_priority	 = 299,
+				.cra_flags	 = CRYPTO_ALG_TYPE_AHASH |
+						   CRYPTO_ALG_ASYNC |
+						   CRYPTO_ALG_OPTIONAL_KEY |
+						   CRYPTO_ALG_KERN_DRIVER_ONLY |
+						   CRYPTO_ALG_ALLOCATES_MEMORY |
+						   CRYPTO_AHASH_ALG_BLOCK_ONLY |
+						   CRYPTO_AHASH_ALG_FINAL_NONZERO |
+						   CRYPTO_AHASH_ALG_FINUP_MAX |
+						   CRYPTO_AHASH_ALG_NO_EXPORT_CORE,
+				.cra_blocksize	 = MD5_BLOCK_SIZE,
+				.cra_ctxsize	 = sizeof(struct dthe_tfm_ctx),
+				.cra_reqsize	 = sizeof(struct dthe_hash_req_ctx),
+				.cra_module	 = THIS_MODULE,
+			}
+		},
+		.op.do_one_request = dthe_hash_run,
+	},
 };
 
 int dthe_register_hash_algs(void)
-- 
2.34.1