[PATCH 1/3] crypto: inside-secure - Added support for authenc HMAC-SHA1/DES-CBC

[Pascal van Leeuwen <pascalvanl@gmail.com>]

This patch adds support for the authenc(hmac(sha1),cbc(des)) aead

Signed-off-by: Pascal van Leeuwen <pvanleeuwen@verimatrix.com>
---
 drivers/crypto/inside-secure/safexcel.c        |  1 +
 drivers/crypto/inside-secure/safexcel.h        |  1 +
 drivers/crypto/inside-secure/safexcel_cipher.c | 45 ++++++++++++++++++++++++++
 3 files changed, 47 insertions(+)

diff --git a/drivers/crypto/inside-secure/safexcel.c b/drivers/crypto/inside-secure/safexcel.c
index 12cb939..617c70b 100644
--- a/drivers/crypto/inside-secure/safexcel.c
+++ b/drivers/crypto/inside-secure/safexcel.c
@@ -1195,6 +1195,7 @@ static int safexcel_request_ring_irq(void *pdev, int irqid,
 	&safexcel_alg_hmac_sha3_256,
 	&safexcel_alg_hmac_sha3_384,
 	&safexcel_alg_hmac_sha3_512,
+	&safexcel_alg_authenc_hmac_sha1_cbc_des,
 };
 
 static int safexcel_register_algorithms(struct safexcel_crypto_priv *priv)
diff --git a/drivers/crypto/inside-secure/safexcel.h b/drivers/crypto/inside-secure/safexcel.h
index 82953b3..b020e27 100644
--- a/drivers/crypto/inside-secure/safexcel.h
+++ b/drivers/crypto/inside-secure/safexcel.h
@@ -895,5 +895,6 @@ int safexcel_hmac_setkey(const char *alg, const u8 *key, unsigned int keylen,
 extern struct safexcel_alg_template safexcel_alg_hmac_sha3_256;
 extern struct safexcel_alg_template safexcel_alg_hmac_sha3_384;
 extern struct safexcel_alg_template safexcel_alg_hmac_sha3_512;
+extern struct safexcel_alg_template safexcel_alg_authenc_hmac_sha1_cbc_des;
 
 #endif
diff --git a/drivers/crypto/inside-secure/safexcel_cipher.c b/drivers/crypto/inside-secure/safexcel_cipher.c
index bf2b1f9..435f184 100644
--- a/drivers/crypto/inside-secure/safexcel_cipher.c
+++ b/drivers/crypto/inside-secure/safexcel_cipher.c
@@ -348,6 +348,7 @@ static int safexcel_aead_setkey(struct crypto_aead *ctfm, const u8 *key,
 	struct safexcel_crypto_priv *priv = ctx->priv;
 	struct crypto_authenc_keys keys;
 	struct crypto_aes_ctx aes;
+	u32 tmp[DES_EXPKEY_WORDS];
 	u32 flags;
 	int err = -EINVAL;
 
@@ -367,6 +368,16 @@ static int safexcel_aead_setkey(struct crypto_aead *ctfm, const u8 *key,
 
 	/* Encryption key */
 	switch (ctx->alg) {
+	case SAFEXCEL_DES:
+		if (keys.enckeylen != DES_KEY_SIZE)
+			goto badkey;
+		err = des_ekey(tmp, key);
+		if (unlikely(!err && (tfm->crt_flags &
+				      CRYPTO_TFM_REQ_FORBID_WEAK_KEYS))) {
+			tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY;
+			goto badkey_expflags;
+		}
+		break;
 	case SAFEXCEL_3DES:
 		if (keys.enckeylen != DES3_EDE_KEY_SIZE)
 			goto badkey;
@@ -1854,6 +1865,40 @@ struct safexcel_alg_template safexcel_alg_authenc_hmac_sha1_cbc_des3_ede = {
 	},
 };
 
+static int safexcel_aead_sha1_des_cra_init(struct crypto_tfm *tfm)
+{
+	struct safexcel_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
+
+	safexcel_aead_sha1_cra_init(tfm);
+	ctx->alg = SAFEXCEL_DES; /* override default */
+	return 0;
+}
+
+struct safexcel_alg_template safexcel_alg_authenc_hmac_sha1_cbc_des = {
+	.type = SAFEXCEL_ALG_TYPE_AEAD,
+	.algo_mask = SAFEXCEL_ALG_DES | SAFEXCEL_ALG_SHA1,
+	.alg.aead = {
+		.setkey = safexcel_aead_setkey,
+		.encrypt = safexcel_aead_encrypt,
+		.decrypt = safexcel_aead_decrypt,
+		.ivsize = DES_BLOCK_SIZE,
+		.maxauthsize = SHA1_DIGEST_SIZE,
+		.base = {
+			.cra_name = "authenc(hmac(sha1),cbc(des))",
+			.cra_driver_name = "safexcel-authenc-hmac-sha1-cbc-des",
+			.cra_priority = SAFEXCEL_CRA_PRIORITY,
+			.cra_flags = CRYPTO_ALG_ASYNC |
+				     CRYPTO_ALG_KERN_DRIVER_ONLY,
+			.cra_blocksize = DES_BLOCK_SIZE,
+			.cra_ctxsize = sizeof(struct safexcel_cipher_ctx),
+			.cra_alignmask = 0,
+			.cra_init = safexcel_aead_sha1_des_cra_init,
+			.cra_exit = safexcel_aead_cra_exit,
+			.cra_module = THIS_MODULE,
+		},
+	},
+};
+
 static int safexcel_aead_sha1_ctr_cra_init(struct crypto_tfm *tfm)
 {
 	struct safexcel_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
-- 
1.8.3.1