Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

Pull crypto updates from Herbert Xu:
 "Here is the crypto update for 4.15:

  API:

   - Disambiguate EBUSY when queueing crypto request by adding ENOSPC.
     This change touches code outside the crypto API.
   - Reset settings when empty string is written to rng_current.

  Algorithms:

   - Add OSCCA SM3 secure hash.

  Drivers:

   - Remove old mv_cesa driver (replaced by marvell/cesa).
   - Enable rfc3686/ecb/cfb/ofb AES in crypto4xx.
   - Add ccm/gcm AES in crypto4xx.
   - Add support for BCM7278 in iproc-rng200.
   - Add hash support on Exynos in s5p-sss.
   - Fix fallback-induced error in vmx.
   - Fix output IV in atmel-aes.
   - Fix empty GCM hash in mediatek.

  Others:

   - Fix DoS potential in lib/mpi.
   - Fix potential out-of-order issues with padata"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (162 commits)
  lib/mpi: call cond_resched() from mpi_powm() loop
  crypto: stm32/hash - Fix return issue on update
  crypto: dh - Remove pointless checks for NULL 'p' and 'g'
  crypto: qat - Clean up error handling in qat_dh_set_secret()
  crypto: dh - Don't permit 'key' or 'g' size longer than 'p'
  crypto: dh - Don't permit 'p' to be 0
  crypto: dh - Fix double free of ctx->p
  hwrng: iproc-rng200 - Add support for BCM7278
  dt-bindings: rng: Document BCM7278 RNG200 compatible
  crypto: chcr - Replace _manual_ swap with swap macro
  crypto: marvell - Add a NULL entry at the end of mv_cesa_plat_id_table[]
  hwrng: virtio - Virtio RNG devices need to be re-registered after suspend/resume
  crypto: atmel - remove empty functions
  crypto: ecdh - remove empty exit()
  MAINTAINERS: update maintainer for qat
  crypto: caam - remove unused param of ctx_map_to_sec4_sg()
  crypto: caam - remove unneeded edesc zeroization
  crypto: atmel-aes - Reset the controller before each use
  crypto: atmel-aes - properly set IV after {en,de}crypt
  hwrng: core - Reset user selected rng by writing "" to rng_current
  ...

1 files changed, 18 insertions, 37 deletions

diff --git a/crypto/gcm.c b/crypto/gcm.c
index 3841b5eafa7e..8589681fb9f6 100644
--- a/crypto/gcm.c
+++ b/crypto/gcm.c
@@ -14,9 +14,9 @@
 #include <crypto/internal/hash.h>
 #include <crypto/null.h>
 #include <crypto/scatterwalk.h>
+#include <crypto/gcm.h>
 #include <crypto/hash.h>
 #include "internal.h"
-#include <linux/completion.h>
 #include <linux/err.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
@@ -78,11 +78,6 @@ struct crypto_gcm_req_priv_ctx {
 	} u;
 };
 
-struct crypto_gcm_setkey_result {
-	int err;
-	struct completion completion;
-};
-
 static struct {
 	u8 buf[16];
 	struct scatterlist sg;
@@ -98,17 +93,6 @@ static inline struct crypto_gcm_req_priv_ctx *crypto_gcm_reqctx(
 	return (void *)PTR_ALIGN((u8 *)aead_request_ctx(req), align + 1);
 }
 
-static void crypto_gcm_setkey_done(struct crypto_async_request *req, int err)
-{
-	struct crypto_gcm_setkey_result *result = req->data;
-
-	if (err == -EINPROGRESS)
-		return;
-
-	result->err = err;
-	complete(&result->completion);
-}
-
 static int crypto_gcm_setkey(struct crypto_aead *aead, const u8 *key,
 			     unsigned int keylen)
 {
@@ -119,7 +103,7 @@ static int crypto_gcm_setkey(struct crypto_aead *aead, const u8 *key,
 		be128 hash;
 		u8 iv[16];
 
-		struct crypto_gcm_setkey_result result;
+		struct crypto_wait wait;
 
 		struct scatterlist sg[1];
 		struct skcipher_request req;
@@ -140,21 +124,18 @@ static int crypto_gcm_setkey(struct crypto_aead *aead, const u8 *key,
 	if (!data)
 		return -ENOMEM;
 
-	init_completion(&data->result.completion);
+	crypto_init_wait(&data->wait);
 	sg_init_one(data->sg, &data->hash, sizeof(data->hash));
 	skcipher_request_set_tfm(&data->req, ctr);
 	skcipher_request_set_callback(&data->req, CRYPTO_TFM_REQ_MAY_SLEEP |
 						  CRYPTO_TFM_REQ_MAY_BACKLOG,
-				      crypto_gcm_setkey_done,
-				      &data->result);
+				      crypto_req_done,
+				      &data->wait);
 	skcipher_request_set_crypt(&data->req, data->sg, data->sg,
 				   sizeof(data->hash), data->iv);
 
-	err = crypto_skcipher_encrypt(&data->req);
-	if (err == -EINPROGRESS || err == -EBUSY) {
-		wait_for_completion(&data->result.completion);
-		err = data->result.err;
-	}
+	err = crypto_wait_req(crypto_skcipher_encrypt(&data->req),
+							&data->wait);
 
 	if (err)
 		goto out;
@@ -197,8 +178,8 @@ static void crypto_gcm_init_common(struct aead_request *req)
 	struct scatterlist *sg;
 
 	memset(pctx->auth_tag, 0, sizeof(pctx->auth_tag));
-	memcpy(pctx->iv, req->iv, 12);
-	memcpy(pctx->iv + 12, &counter, 4);
+	memcpy(pctx->iv, req->iv, GCM_AES_IV_SIZE);
+	memcpy(pctx->iv + GCM_AES_IV_SIZE, &counter, 4);
 
 	sg_init_table(pctx->src, 3);
 	sg_set_buf(pctx->src, pctx->auth_tag, sizeof(pctx->auth_tag));
@@ -695,7 +676,7 @@ static int crypto_gcm_create_common(struct crypto_template *tmpl,
 	inst->alg.base.cra_alignmask = ghash->base.cra_alignmask |
 				       ctr->base.cra_alignmask;
 	inst->alg.base.cra_ctxsize = sizeof(struct crypto_gcm_ctx);
-	inst->alg.ivsize = 12;
+	inst->alg.ivsize = GCM_AES_IV_SIZE;
 	inst->alg.chunksize = crypto_skcipher_alg_chunksize(ctr);
 	inst->alg.maxauthsize = 16;
 	inst->alg.init = crypto_gcm_init_tfm;
@@ -832,20 +813,20 @@ static struct aead_request *crypto_rfc4106_crypt(struct aead_request *req)
 	u8 *iv = PTR_ALIGN((u8 *)(subreq + 1) + crypto_aead_reqsize(child),
 			   crypto_aead_alignmask(child) + 1);
 
-	scatterwalk_map_and_copy(iv + 12, req->src, 0, req->assoclen - 8, 0);
+	scatterwalk_map_and_copy(iv + GCM_AES_IV_SIZE, req->src, 0, req->assoclen - 8, 0);
 
 	memcpy(iv, ctx->nonce, 4);
 	memcpy(iv + 4, req->iv, 8);
 
 	sg_init_table(rctx->src, 3);
-	sg_set_buf(rctx->src, iv + 12, req->assoclen - 8);
+	sg_set_buf(rctx->src, iv + GCM_AES_IV_SIZE, req->assoclen - 8);
 	sg = scatterwalk_ffwd(rctx->src + 1, req->src, req->assoclen);
 	if (sg != rctx->src + 1)
 		sg_chain(rctx->src, 2, sg);
 
 	if (req->src != req->dst) {
 		sg_init_table(rctx->dst, 3);
-		sg_set_buf(rctx->dst, iv + 12, req->assoclen - 8);
+		sg_set_buf(rctx->dst, iv + GCM_AES_IV_SIZE, req->assoclen - 8);
 		sg = scatterwalk_ffwd(rctx->dst + 1, req->dst, req->assoclen);
 		if (sg != rctx->dst + 1)
 			sg_chain(rctx->dst, 2, sg);
@@ -957,7 +938,7 @@ static int crypto_rfc4106_create(struct crypto_template *tmpl,
 	err = -EINVAL;
 
 	/* Underlying IV size must be 12. */
-	if (crypto_aead_alg_ivsize(alg) != 12)
+	if (crypto_aead_alg_ivsize(alg) != GCM_AES_IV_SIZE)
 		goto out_drop_alg;
 
 	/* Not a stream cipher? */
@@ -980,7 +961,7 @@ static int crypto_rfc4106_create(struct crypto_template *tmpl,
 
 	inst->alg.base.cra_ctxsize = sizeof(struct crypto_rfc4106_ctx);
 
-	inst->alg.ivsize = 8;
+	inst->alg.ivsize = GCM_RFC4106_IV_SIZE;
 	inst->alg.chunksize = crypto_aead_alg_chunksize(alg);
 	inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
 
@@ -1134,7 +1115,7 @@ static int crypto_rfc4543_init_tfm(struct crypto_aead *tfm)
 		tfm,
 		sizeof(struct crypto_rfc4543_req_ctx) +
 		ALIGN(crypto_aead_reqsize(aead), crypto_tfm_ctx_alignment()) +
-		align + 12);
+		align + GCM_AES_IV_SIZE);
 
 	return 0;
 
@@ -1199,7 +1180,7 @@ static int crypto_rfc4543_create(struct crypto_template *tmpl,
 	err = -EINVAL;
 
 	/* Underlying IV size must be 12. */
-	if (crypto_aead_alg_ivsize(alg) != 12)
+	if (crypto_aead_alg_ivsize(alg) != GCM_AES_IV_SIZE)
 		goto out_drop_alg;
 
 	/* Not a stream cipher? */
@@ -1222,7 +1203,7 @@ static int crypto_rfc4543_create(struct crypto_template *tmpl,
 
 	inst->alg.base.cra_ctxsize = sizeof(struct crypto_rfc4543_ctx);
 
-	inst->alg.ivsize = 8;
+	inst->alg.ivsize = GCM_RFC4543_IV_SIZE;
 	inst->alg.chunksize = crypto_aead_alg_chunksize(alg);
 	inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);