crypto: nx - Use new IV convention

This patch converts rfc4106 to the new calling convention where
the IV is now part of the AD and needs to be skipped.  This patch
also makes use of type-safe AEAD functions where possible.

Signed-off-by: Herbert Xu <[email protected]>

Author: herbertx

drivers/crypto/nx/nx-aes-gcm.c

@@ -21,11 +21,9 @@
 
 #include <crypto/internal/aead.h>
 #include <crypto/aes.h>
-#include <crypto/algapi.h>
 #include <crypto/scatterwalk.h>
 #include <linux/module.h>
 #include <linux/types.h>
-#include <linux/crypto.h>
 #include <asm/vio.h>
 
 #include "nx_csbcpb.h"
@@ -36,7 +34,7 @@ static int gcm_aes_nx_set_key(struct crypto_aead *tfm,
 			      const u8           *in_key,
 			      unsigned int        key_len)
 {
-	struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&tfm->base);
+	struct nx_crypto_ctx *nx_ctx = crypto_aead_ctx(tfm);
 	struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
 	struct nx_csbcpb *csbcpb_aead = nx_ctx->csbcpb_aead;
 
@@ -75,7 +73,7 @@ static int gcm4106_aes_nx_set_key(struct crypto_aead *tfm,
 				  const u8           *in_key,
 				  unsigned int        key_len)
 {
-	struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(&tfm->base);
+	struct nx_crypto_ctx *nx_ctx = crypto_aead_ctx(tfm);
 	char *nonce = nx_ctx->priv.gcm.nonce;
 	int rc;
 
@@ -110,13 +108,14 @@ static int gcm4106_aes_nx_setauthsize(struct crypto_aead *tfm,
 
 static int nx_gca(struct nx_crypto_ctx  *nx_ctx,
 		  struct aead_request   *req,
-		  u8                    *out)
+		  u8                    *out,
+		  unsigned int assoclen)
 {
 	int rc;
 	struct nx_csbcpb *csbcpb_aead = nx_ctx->csbcpb_aead;
 	struct scatter_walk walk;
 	struct nx_sg *nx_sg = nx_ctx->in_sg;
-	unsigned int nbytes = req->assoclen;
+	unsigned int nbytes = assoclen;
 	unsigned int processed = 0, to_process;
 	unsigned int max_sg_len;
 
@@ -167,7 +166,7 @@ static int nx_gca(struct nx_crypto_ctx  *nx_ctx,
 		NX_CPB_FDM(csbcpb_aead) |= NX_FDM_CONTINUATION;
 
 		atomic_inc(&(nx_ctx->stats->aes_ops));
-		atomic64_add(req->assoclen, &(nx_ctx->stats->aes_bytes));
+		atomic64_add(assoclen, &(nx_ctx->stats->aes_bytes));
 
 		processed += to_process;
 	} while (processed < nbytes);
@@ -177,13 +176,15 @@ static int nx_gca(struct nx_crypto_ctx  *nx_ctx,
 	return rc;
 }
 
-static int gmac(struct aead_request *req, struct blkcipher_desc *desc)
+static int gmac(struct aead_request *req, struct blkcipher_desc *desc,
+		unsigned int assoclen)
 {
 	int rc;
-	struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(req->base.tfm);
+	struct nx_crypto_ctx *nx_ctx =
+		crypto_aead_ctx(crypto_aead_reqtfm(req));
 	struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
 	struct nx_sg *nx_sg;
-	unsigned int nbytes = req->assoclen;
+	unsigned int nbytes = assoclen;
 	unsigned int processed = 0, to_process;
 	unsigned int max_sg_len;
 
@@ -238,7 +239,7 @@ static int gmac(struct aead_request *req, struct blkcipher_desc *desc)
 		NX_CPB_FDM(csbcpb) |= NX_FDM_CONTINUATION;
 
 		atomic_inc(&(nx_ctx->stats->aes_ops));
-		atomic64_add(req->assoclen, &(nx_ctx->stats->aes_bytes));
+		atomic64_add(assoclen, &(nx_ctx->stats->aes_bytes));
 
 		processed += to_process;
 	} while (processed < nbytes);
@@ -253,7 +254,8 @@ static int gcm_empty(struct aead_request *req, struct blkcipher_desc *desc,
 		     int enc)
 {
 	int rc;
-	struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(req->base.tfm);
+	struct nx_crypto_ctx *nx_ctx =
+		crypto_aead_ctx(crypto_aead_reqtfm(req));
 	struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
 	char out[AES_BLOCK_SIZE];
 	struct nx_sg *in_sg, *out_sg;
@@ -314,9 +316,11 @@ static int gcm_empty(struct aead_request *req, struct blkcipher_desc *desc,
 	return rc;
 }
 
-static int gcm_aes_nx_crypt(struct aead_request *req, int enc)
+static int gcm_aes_nx_crypt(struct aead_request *req, int enc,
+			    unsigned int assoclen)
 {
-	struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(req->base.tfm);
+	struct nx_crypto_ctx *nx_ctx =
+		crypto_aead_ctx(crypto_aead_reqtfm(req));
 	struct nx_gcm_rctx *rctx = aead_request_ctx(req);
 	struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
 	struct blkcipher_desc desc;
@@ -332,20 +336,21 @@ static int gcm_aes_nx_crypt(struct aead_request *req, int enc)
 	*(u32 *)(desc.info + NX_GCM_CTR_OFFSET) = 1;
 
 	if (nbytes == 0) {
-		if (req->assoclen == 0)
+		if (assoclen == 0)
 			rc = gcm_empty(req, &desc, enc);
 		else
-			rc = gmac(req, &desc);
+			rc = gmac(req, &desc, assoclen);
 		if (rc)
 			goto out;
 		else
 			goto mac;
 	}
 
 	/* Process associated data */
-	csbcpb->cpb.aes_gcm.bit_length_aad = req->assoclen * 8;
-	if (req->assoclen) {
-		rc = nx_gca(nx_ctx, req, csbcpb->cpb.aes_gcm.in_pat_or_aad);
+	csbcpb->cpb.aes_gcm.bit_length_aad = assoclen * 8;
+	if (assoclen) {
+		rc = nx_gca(nx_ctx, req, csbcpb->cpb.aes_gcm.in_pat_or_aad,
+			    assoclen);
 		if (rc)
 			goto out;
 	}
@@ -363,7 +368,6 @@ static int gcm_aes_nx_crypt(struct aead_request *req, int enc)
 		to_process = nbytes - processed;
 
 		csbcpb->cpb.aes_gcm.bit_length_data = nbytes * 8;
-		desc.tfm = (struct crypto_blkcipher *) req->base.tfm;
 		rc = nx_build_sg_lists(nx_ctx, &desc, req->dst,
 				       req->src, &to_process,
 				       processed + req->assoclen,
@@ -430,7 +434,7 @@ static int gcm_aes_nx_encrypt(struct aead_request *req)
 
 	memcpy(iv, req->iv, 12);
 
-	return gcm_aes_nx_crypt(req, 1);
+	return gcm_aes_nx_crypt(req, 1, req->assoclen);
 }
 
 static int gcm_aes_nx_decrypt(struct aead_request *req)
@@ -440,33 +444,41 @@ static int gcm_aes_nx_decrypt(struct aead_request *req)
 
 	memcpy(iv, req->iv, 12);
 
-	return gcm_aes_nx_crypt(req, 0);
+	return gcm_aes_nx_crypt(req, 0, req->assoclen);
 }
 
 static int gcm4106_aes_nx_encrypt(struct aead_request *req)
 {
-	struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(req->base.tfm);
+	struct nx_crypto_ctx *nx_ctx =
+		crypto_aead_ctx(crypto_aead_reqtfm(req));
 	struct nx_gcm_rctx *rctx = aead_request_ctx(req);
 	char *iv = rctx->iv;
 	char *nonce = nx_ctx->priv.gcm.nonce;
 
 	memcpy(iv, nonce, NX_GCM4106_NONCE_LEN);
 	memcpy(iv + NX_GCM4106_NONCE_LEN, req->iv, 8);
 
-	return gcm_aes_nx_crypt(req, 1);
+	if (req->assoclen < 8)
+		return -EINVAL;
+
+	return gcm_aes_nx_crypt(req, 1, req->assoclen - 8);
 }
 
 static int gcm4106_aes_nx_decrypt(struct aead_request *req)
 {
-	struct nx_crypto_ctx *nx_ctx = crypto_tfm_ctx(req->base.tfm);
+	struct nx_crypto_ctx *nx_ctx =
+		crypto_aead_ctx(crypto_aead_reqtfm(req));
 	struct nx_gcm_rctx *rctx = aead_request_ctx(req);
 	char *iv = rctx->iv;
 	char *nonce = nx_ctx->priv.gcm.nonce;
 
 	memcpy(iv, nonce, NX_GCM4106_NONCE_LEN);
 	memcpy(iv + NX_GCM4106_NONCE_LEN, req->iv, 8);
 
-	return gcm_aes_nx_crypt(req, 0);
+	if (req->assoclen < 8)
+		return -EINVAL;
+
+	return gcm_aes_nx_crypt(req, 0, req->assoclen - 8);
 }
 
 /* tell the block cipher walk routines that this is a stream cipher by
@@ -478,6 +490,7 @@ struct aead_alg nx_gcm_aes_alg = {
 	.base = {
 		.cra_name        = "gcm(aes)",
 		.cra_driver_name = "gcm-aes-nx",
+		.cra_flags	 = CRYPTO_ALG_AEAD_NEW,
 		.cra_priority    = 300,
 		.cra_blocksize   = 1,
 		.cra_ctxsize     = sizeof(struct nx_crypto_ctx),
@@ -496,6 +509,7 @@ struct aead_alg nx_gcm4106_aes_alg = {
 	.base = {
 		.cra_name        = "rfc4106(gcm(aes))",
 		.cra_driver_name = "rfc4106-gcm-aes-nx",
+		.cra_flags	 = CRYPTO_ALG_AEAD_NEW,
 		.cra_priority    = 300,
 		.cra_blocksize   = 1,
 		.cra_ctxsize     = sizeof(struct nx_crypto_ctx),