crypto: ansi_cprng - Fix module initialization
[linux-2.6.git] / crypto / gcm.c
index d60c340..5fc3292 100644 (file)
  * by the Free Software Foundation.
  */
 
-#include <crypto/algapi.h>
 #include <crypto/gf128mul.h>
+#include <crypto/internal/aead.h>
+#include <crypto/internal/skcipher.h>
+#include <crypto/internal/hash.h>
+#include <crypto/scatterwalk.h>
+#include <crypto/hash.h>
+#include "internal.h"
+#include <linux/completion.h>
 #include <linux/err.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/slab.h>
 
-#include "scatterwalk.h"
-
 struct gcm_instance_ctx {
-       struct crypto_spawn ctr;
+       struct crypto_skcipher_spawn ctr;
+       struct crypto_ahash_spawn ghash;
 };
 
 struct crypto_gcm_ctx {
        struct crypto_ablkcipher *ctr;
-       struct gf128mul_4k *gf128;
+       struct crypto_ahash *ghash;
+};
+
+struct crypto_rfc4106_ctx {
+       struct crypto_aead *child;
+       u8 nonce[4];
 };
 
 struct crypto_gcm_ghash_ctx {
-       u32 bytes;
-       u32 flags;
-       struct gf128mul_4k *gf128;
-       u8 buffer[16];
+       unsigned int cryptlen;
+       struct scatterlist *src;
+       crypto_completion_t complete;
 };
 
 struct crypto_gcm_req_priv_ctx {
        u8 auth_tag[16];
        u8 iauth_tag[16];
-       u8 counter[16];
-       struct crypto_gcm_ghash_ctx ghash;
+       struct scatterlist src[2];
+       struct scatterlist dst[2];
+       struct crypto_gcm_ghash_ctx ghash_ctx;
+       union {
+               struct ahash_request ahreq;
+               struct ablkcipher_request abreq;
+       } u;
+};
+
+struct crypto_gcm_setkey_result {
+       int err;
+       struct completion completion;
 };
 
-static void crypto_gcm_ghash_init(struct crypto_gcm_ghash_ctx *ctx, u32 flags,
-                                 struct gf128mul_4k *gf128)
+static void *gcm_zeroes;
+
+static inline struct crypto_gcm_req_priv_ctx *crypto_gcm_reqctx(
+       struct aead_request *req)
 {
-       ctx->bytes = 0;
-       ctx->flags = flags;
-       ctx->gf128 = gf128;
-       memset(ctx->buffer, 0, 16);
+       unsigned long align = crypto_aead_alignmask(crypto_aead_reqtfm(req));
+
+       return (void *)PTR_ALIGN((u8 *)aead_request_ctx(req), align + 1);
 }
 
-static void crypto_gcm_ghash_update(struct crypto_gcm_ghash_ctx *ctx,
-                                   const u8 *src, unsigned int srclen)
+static void crypto_gcm_setkey_done(struct crypto_async_request *req, int err)
 {
-       u8 *dst = ctx->buffer;
+       struct crypto_gcm_setkey_result *result = req->data;
 
-       if (ctx->bytes) {
-               int n = min(srclen, ctx->bytes);
-               u8 *pos = dst + (16 - ctx->bytes);
+       if (err == -EINPROGRESS)
+               return;
 
-               ctx->bytes -= n;
-               srclen -= n;
+       result->err = err;
+       complete(&result->completion);
+}
 
-               while (n--)
-                       *pos++ ^= *src++;
+static int crypto_gcm_setkey(struct crypto_aead *aead, const u8 *key,
+                            unsigned int keylen)
+{
+       struct crypto_gcm_ctx *ctx = crypto_aead_ctx(aead);
+       struct crypto_ahash *ghash = ctx->ghash;
+       struct crypto_ablkcipher *ctr = ctx->ctr;
+       struct {
+               be128 hash;
+               u8 iv[8];
 
-               if (!ctx->bytes)
-                       gf128mul_4k_lle((be128 *)dst, ctx->gf128);
-       }
+               struct crypto_gcm_setkey_result result;
 
-       while (srclen >= 16) {
-               crypto_xor(dst, src, 16);
-               gf128mul_4k_lle((be128 *)dst, ctx->gf128);
-               src += 16;
-               srclen -= 16;
-       }
+               struct scatterlist sg[1];
+               struct ablkcipher_request req;
+       } *data;
+       int err;
 
-       if (srclen) {
-               ctx->bytes = 16 - srclen;
-               while (srclen--)
-                       *dst++ ^= *src++;
-       }
-}
+       crypto_ablkcipher_clear_flags(ctr, CRYPTO_TFM_REQ_MASK);
+       crypto_ablkcipher_set_flags(ctr, crypto_aead_get_flags(aead) &
+                                  CRYPTO_TFM_REQ_MASK);
 
-static void crypto_gcm_ghash_update_sg(struct crypto_gcm_ghash_ctx *ctx,
-                                      struct scatterlist *sg, int len)
-{
-       struct scatter_walk walk;
-       u8 *src;
-       int n;
+       err = crypto_ablkcipher_setkey(ctr, key, keylen);
+       if (err)
+               return err;
 
-       if (!len)
-               return;
+       crypto_aead_set_flags(aead, crypto_ablkcipher_get_flags(ctr) &
+                                      CRYPTO_TFM_RES_MASK);
 
-       scatterwalk_start(&walk, sg);
+       data = kzalloc(sizeof(*data) + crypto_ablkcipher_reqsize(ctr),
+                      GFP_KERNEL);
+       if (!data)
+               return -ENOMEM;
+
+       init_completion(&data->result.completion);
+       sg_init_one(data->sg, &data->hash, sizeof(data->hash));
+       ablkcipher_request_set_tfm(&data->req, ctr);
+       ablkcipher_request_set_callback(&data->req, CRYPTO_TFM_REQ_MAY_SLEEP |
+                                                   CRYPTO_TFM_REQ_MAY_BACKLOG,
+                                       crypto_gcm_setkey_done,
+                                       &data->result);
+       ablkcipher_request_set_crypt(&data->req, data->sg, data->sg,
+                                    sizeof(data->hash), data->iv);
+
+       err = crypto_ablkcipher_encrypt(&data->req);
+       if (err == -EINPROGRESS || err == -EBUSY) {
+               err = wait_for_completion_interruptible(
+                       &data->result.completion);
+               if (!err)
+                       err = data->result.err;
+       }
 
-       while (len) {
-               n = scatterwalk_clamp(&walk, len);
+       if (err)
+               goto out;
+
+       crypto_ahash_clear_flags(ghash, CRYPTO_TFM_REQ_MASK);
+       crypto_ahash_set_flags(ghash, crypto_aead_get_flags(aead) &
+                              CRYPTO_TFM_REQ_MASK);
+       err = crypto_ahash_setkey(ghash, (u8 *)&data->hash, sizeof(be128));
+       crypto_aead_set_flags(aead, crypto_ahash_get_flags(ghash) &
+                             CRYPTO_TFM_RES_MASK);
 
-               if (!n) {
-                       scatterwalk_start(&walk, sg_next(walk.sg));
-                       n = scatterwalk_clamp(&walk, len);
-               }
+out:
+       kfree(data);
+       return err;
+}
 
-               src = scatterwalk_map(&walk, 0);
+static int crypto_gcm_setauthsize(struct crypto_aead *tfm,
+                                 unsigned int authsize)
+{
+       switch (authsize) {
+       case 4:
+       case 8:
+       case 12:
+       case 13:
+       case 14:
+       case 15:
+       case 16:
+               break;
+       default:
+               return -EINVAL;
+       }
 
-               crypto_gcm_ghash_update(ctx, src, n);
-               len -= n;
+       return 0;
+}
 
-               scatterwalk_unmap(src, 0);
-               scatterwalk_advance(&walk, n);
-               scatterwalk_done(&walk, 0, len);
-               if (len)
-                       crypto_yield(ctx->flags);
+static void crypto_gcm_init_crypt(struct ablkcipher_request *ablk_req,
+                                 struct aead_request *req,
+                                 unsigned int cryptlen)
+{
+       struct crypto_aead *aead = crypto_aead_reqtfm(req);
+       struct crypto_gcm_ctx *ctx = crypto_aead_ctx(aead);
+       struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
+       struct scatterlist *dst;
+       __be32 counter = cpu_to_be32(1);
+
+       memset(pctx->auth_tag, 0, sizeof(pctx->auth_tag));
+       memcpy(req->iv + 12, &counter, 4);
+
+       sg_init_table(pctx->src, 2);
+       sg_set_buf(pctx->src, pctx->auth_tag, sizeof(pctx->auth_tag));
+       scatterwalk_sg_chain(pctx->src, 2, req->src);
+
+       dst = pctx->src;
+       if (req->src != req->dst) {
+               sg_init_table(pctx->dst, 2);
+               sg_set_buf(pctx->dst, pctx->auth_tag, sizeof(pctx->auth_tag));
+               scatterwalk_sg_chain(pctx->dst, 2, req->dst);
+               dst = pctx->dst;
        }
+
+       ablkcipher_request_set_tfm(ablk_req, ctx->ctr);
+       ablkcipher_request_set_crypt(ablk_req, pctx->src, dst,
+                                    cryptlen + sizeof(pctx->auth_tag),
+                                    req->iv);
 }
 
-static void crypto_gcm_ghash_flush(struct crypto_gcm_ghash_ctx *ctx)
+static inline unsigned int gcm_remain(unsigned int len)
 {
-       u8 *dst = ctx->buffer;
+       len &= 0xfU;
+       return len ? 16 - len : 0;
+}
 
-       if (ctx->bytes) {
-               u8 *tmp = dst + (16 - ctx->bytes);
+static void gcm_hash_len_done(struct crypto_async_request *areq, int err);
+static void gcm_hash_final_done(struct crypto_async_request *areq, int err);
 
-               while (ctx->bytes--)
-                       *tmp++ ^= 0;
+static int gcm_hash_update(struct aead_request *req,
+                          struct crypto_gcm_req_priv_ctx *pctx,
+                          crypto_completion_t complete,
+                          struct scatterlist *src,
+                          unsigned int len)
+{
+       struct ahash_request *ahreq = &pctx->u.ahreq;
 
-               gf128mul_4k_lle((be128 *)dst, ctx->gf128);
-       }
+       ahash_request_set_callback(ahreq, aead_request_flags(req),
+                                  complete, req);
+       ahash_request_set_crypt(ahreq, src, NULL, len);
 
-       ctx->bytes = 0;
+       return crypto_ahash_update(ahreq);
 }
 
-static void crypto_gcm_ghash_final_xor(struct crypto_gcm_ghash_ctx *ctx,
-                                      unsigned int authlen,
-                                      unsigned int cryptlen, u8 *dst)
+static int gcm_hash_remain(struct aead_request *req,
+                          struct crypto_gcm_req_priv_ctx *pctx,
+                          unsigned int remain,
+                          crypto_completion_t complete)
 {
-       u8 *buf = ctx->buffer;
-       u128 lengths;
+       struct ahash_request *ahreq = &pctx->u.ahreq;
 
-       lengths.a = cpu_to_be64(authlen * 8);
-       lengths.b = cpu_to_be64(cryptlen * 8);
+       ahash_request_set_callback(ahreq, aead_request_flags(req),
+                                  complete, req);
+       sg_init_one(pctx->src, gcm_zeroes, remain);
+       ahash_request_set_crypt(ahreq, pctx->src, NULL, remain);
 
-       crypto_gcm_ghash_flush(ctx);
-       crypto_xor(buf, (u8 *)&lengths, 16);
-       gf128mul_4k_lle((be128 *)buf, ctx->gf128);
-       crypto_xor(dst, buf, 16);
+       return crypto_ahash_update(ahreq);
 }
 
-static inline void crypto_gcm_set_counter(u8 *counterblock, u32 value)
+static int gcm_hash_len(struct aead_request *req,
+                       struct crypto_gcm_req_priv_ctx *pctx)
 {
-       *((u32 *)&counterblock[12]) = cpu_to_be32(value);
+       struct ahash_request *ahreq = &pctx->u.ahreq;
+       struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
+       u128 lengths;
+
+       lengths.a = cpu_to_be64(req->assoclen * 8);
+       lengths.b = cpu_to_be64(gctx->cryptlen * 8);
+       memcpy(pctx->iauth_tag, &lengths, 16);
+       sg_init_one(pctx->src, pctx->iauth_tag, 16);
+       ahash_request_set_callback(ahreq, aead_request_flags(req),
+                                  gcm_hash_len_done, req);
+       ahash_request_set_crypt(ahreq, pctx->src,
+                               NULL, sizeof(lengths));
+
+       return crypto_ahash_update(ahreq);
 }
 
-static int crypto_gcm_encrypt_counter(struct crypto_aead *aead, u8 *block,
-                                      u32 value, const u8 *iv)
+static int gcm_hash_final(struct aead_request *req,
+                         struct crypto_gcm_req_priv_ctx *pctx)
 {
-       struct crypto_gcm_ctx *ctx = crypto_aead_ctx(aead);
-       struct crypto_ablkcipher *ctr = ctx->ctr;
-       struct ablkcipher_request req;
-       struct scatterlist sg;
-       u8 counterblock[16];
+       struct ahash_request *ahreq = &pctx->u.ahreq;
 
-       if (iv == NULL)
-               memset(counterblock, 0, 12);
-       else
-               memcpy(counterblock, iv, 12);
+       ahash_request_set_callback(ahreq, aead_request_flags(req),
+                                  gcm_hash_final_done, req);
+       ahash_request_set_crypt(ahreq, NULL, pctx->iauth_tag, 0);
+
+       return crypto_ahash_final(ahreq);
+}
 
-       crypto_gcm_set_counter(counterblock, value);
+static void gcm_hash_final_done(struct crypto_async_request *areq,
+                               int err)
+{
+       struct aead_request *req = areq->data;
+       struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
+       struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
+
+       if (!err)
+               crypto_xor(pctx->auth_tag, pctx->iauth_tag, 16);
 
-       sg_init_one(&sg, block, 16);
-       ablkcipher_request_set_tfm(&req, ctr);
-       ablkcipher_request_set_crypt(&req, &sg, &sg, 16, counterblock);
-       ablkcipher_request_set_callback(&req, 0, NULL, NULL);
-       memset(block, 0, 16);
-       return crypto_ablkcipher_encrypt(&req);
+       gctx->complete(areq, err);
 }
 
-static int crypto_gcm_setkey(struct crypto_aead *aead, const u8 *key,
-                            unsigned int keylen)
+static void gcm_hash_len_done(struct crypto_async_request *areq,
+                             int err)
 {
-       struct crypto_gcm_ctx *ctx = crypto_aead_ctx(aead);
-       struct crypto_ablkcipher *ctr = ctx->ctr;
-       int alignmask = crypto_ablkcipher_alignmask(ctr);
-       u8 alignbuf[16+alignmask];
-       u8 *hash = (u8 *)ALIGN((unsigned long)alignbuf, alignmask+1);
-       int err = 0;
+       struct aead_request *req = areq->data;
+       struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
 
-       crypto_ablkcipher_clear_flags(ctr, CRYPTO_TFM_REQ_MASK);
-       crypto_ablkcipher_set_flags(ctr, crypto_aead_get_flags(aead) &
-                                  CRYPTO_TFM_REQ_MASK);
+       if (!err) {
+               err = gcm_hash_final(req, pctx);
+               if (err == -EINPROGRESS || err == -EBUSY)
+                       return;
+       }
 
-       err = crypto_ablkcipher_setkey(ctr, key, keylen);
-       if (err)
-               goto out;
+       gcm_hash_final_done(areq, err);
+}
 
-       crypto_aead_set_flags(aead, crypto_ablkcipher_get_flags(ctr) &
-                                      CRYPTO_TFM_RES_MASK);
+static void gcm_hash_crypt_remain_done(struct crypto_async_request *areq,
+                                      int err)
+{
+       struct aead_request *req = areq->data;
+       struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
 
-       err = crypto_gcm_encrypt_counter(aead, hash, -1, NULL);
-       if (err)
-               goto out;
+       if (!err) {
+               err = gcm_hash_len(req, pctx);
+               if (err == -EINPROGRESS || err == -EBUSY)
+                       return;
+       }
+
+       gcm_hash_len_done(areq, err);
+}
 
-       if (ctx->gf128 != NULL)
-               gf128mul_free_4k(ctx->gf128);
+static void gcm_hash_crypt_done(struct crypto_async_request *areq,
+                               int err)
+{
+       struct aead_request *req = areq->data;
+       struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
+       struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
+       unsigned int remain;
+
+       if (!err) {
+               remain = gcm_remain(gctx->cryptlen);
+               BUG_ON(!remain);
+               err = gcm_hash_remain(req, pctx, remain,
+                                     gcm_hash_crypt_remain_done);
+               if (err == -EINPROGRESS || err == -EBUSY)
+                       return;
+       }
 
-       ctx->gf128 = gf128mul_init_4k_lle((be128 *)hash);
+       gcm_hash_crypt_remain_done(areq, err);
+}
 
-       if (ctx->gf128 == NULL)
-               err = -ENOMEM;
+static void gcm_hash_assoc_remain_done(struct crypto_async_request *areq,
+                                          int err)
+{
+       struct aead_request *req = areq->data;
+       struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
+       struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
+       crypto_completion_t complete;
+       unsigned int remain = 0;
+
+       if (!err && gctx->cryptlen) {
+               remain = gcm_remain(gctx->cryptlen);
+               complete = remain ? gcm_hash_crypt_done :
+                       gcm_hash_crypt_remain_done;
+               err = gcm_hash_update(req, pctx, complete,
+                                     gctx->src, gctx->cryptlen);
+               if (err == -EINPROGRESS || err == -EBUSY)
+                       return;
+       }
 
- out:
-       return err;
+       if (remain)
+               gcm_hash_crypt_done(areq, err);
+       else
+               gcm_hash_crypt_remain_done(areq, err);
 }
 
-static int crypto_gcm_init_crypt(struct ablkcipher_request *ablk_req,
-                                struct aead_request *req,
-                                unsigned int cryptlen,
-                                void (*done)(struct crypto_async_request *,
-                                             int))
+static void gcm_hash_assoc_done(struct crypto_async_request *areq,
+                               int err)
 {
-       struct crypto_aead *aead = crypto_aead_reqtfm(req);
-       struct crypto_gcm_ctx *ctx = crypto_aead_ctx(aead);
-       struct crypto_gcm_req_priv_ctx *pctx = aead_request_ctx(req);
-       u32 flags = req->base.tfm->crt_flags;
-       u8 *auth_tag = pctx->auth_tag;
-       u8 *counter = pctx->counter;
-       struct crypto_gcm_ghash_ctx *ghash = &pctx->ghash;
-       int err = 0;
+       struct aead_request *req = areq->data;
+       struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
+       unsigned int remain;
+
+       if (!err) {
+               remain = gcm_remain(req->assoclen);
+               BUG_ON(!remain);
+               err = gcm_hash_remain(req, pctx, remain,
+                                     gcm_hash_assoc_remain_done);
+               if (err == -EINPROGRESS || err == -EBUSY)
+                       return;
+       }
 
-       ablkcipher_request_set_tfm(ablk_req, ctx->ctr);
-       ablkcipher_request_set_callback(ablk_req, aead_request_flags(req),
-                                       done, req);
-       ablkcipher_request_set_crypt(ablk_req, req->src, req->dst,
-                                    cryptlen, counter);
+       gcm_hash_assoc_remain_done(areq, err);
+}
 
-       err = crypto_gcm_encrypt_counter(aead, auth_tag, 0, req->iv);
-       if (err)
-               goto out;
+static void gcm_hash_init_done(struct crypto_async_request *areq,
+                              int err)
+{
+       struct aead_request *req = areq->data;
+       struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
+       crypto_completion_t complete;
+       unsigned int remain = 0;
+
+       if (!err && req->assoclen) {
+               remain = gcm_remain(req->assoclen);
+               complete = remain ? gcm_hash_assoc_done :
+                       gcm_hash_assoc_remain_done;
+               err = gcm_hash_update(req, pctx, complete,
+                                     req->assoc, req->assoclen);
+               if (err == -EINPROGRESS || err == -EBUSY)
+                       return;
+       }
 
-       memcpy(counter, req->iv, 12);
-       crypto_gcm_set_counter(counter, 1);
+       if (remain)
+               gcm_hash_assoc_done(areq, err);
+       else
+               gcm_hash_assoc_remain_done(areq, err);
+}
 
-       crypto_gcm_ghash_init(ghash, flags, ctx->gf128);
+static int gcm_hash(struct aead_request *req,
+                   struct crypto_gcm_req_priv_ctx *pctx)
+{
+       struct ahash_request *ahreq = &pctx->u.ahreq;
+       struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
+       struct crypto_gcm_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
+       unsigned int remain;
+       crypto_completion_t complete;
+       int err;
 
-       crypto_gcm_ghash_update_sg(ghash, req->assoc, req->assoclen);
-       crypto_gcm_ghash_flush(ghash);
+       ahash_request_set_tfm(ahreq, ctx->ghash);
 
- out:
-       return err;
+       ahash_request_set_callback(ahreq, aead_request_flags(req),
+                                  gcm_hash_init_done, req);
+       err = crypto_ahash_init(ahreq);
+       if (err)
+               return err;
+       remain = gcm_remain(req->assoclen);
+       complete = remain ? gcm_hash_assoc_done : gcm_hash_assoc_remain_done;
+       err = gcm_hash_update(req, pctx, complete, req->assoc, req->assoclen);
+       if (err)
+               return err;
+       if (remain) {
+               err = gcm_hash_remain(req, pctx, remain,
+                                     gcm_hash_assoc_remain_done);
+               if (err)
+                       return err;
+       }
+       remain = gcm_remain(gctx->cryptlen);
+       complete = remain ? gcm_hash_crypt_done : gcm_hash_crypt_remain_done;
+       err = gcm_hash_update(req, pctx, complete, gctx->src, gctx->cryptlen);
+       if (err)
+               return err;
+       if (remain) {
+               err = gcm_hash_remain(req, pctx, remain,
+                                     gcm_hash_crypt_remain_done);
+               if (err)
+                       return err;
+       }
+       err = gcm_hash_len(req, pctx);
+       if (err)
+               return err;
+       err = gcm_hash_final(req, pctx);
+       if (err)
+               return err;
+
+       return 0;
 }
 
-static int crypto_gcm_hash(struct aead_request *req)
+static void gcm_enc_copy_hash(struct aead_request *req,
+                             struct crypto_gcm_req_priv_ctx *pctx)
 {
        struct crypto_aead *aead = crypto_aead_reqtfm(req);
-       struct crypto_gcm_req_priv_ctx *pctx = aead_request_ctx(req);
        u8 *auth_tag = pctx->auth_tag;
-       struct crypto_gcm_ghash_ctx *ghash = &pctx->ghash;
-
-       crypto_gcm_ghash_update_sg(ghash, req->dst, req->cryptlen);
-       crypto_gcm_ghash_final_xor(ghash, req->assoclen, req->cryptlen,
-                                  auth_tag);
 
        scatterwalk_map_and_copy(auth_tag, req->dst, req->cryptlen,
                                 crypto_aead_authsize(aead), 1);
-       return 0;
 }
 
-static void crypto_gcm_encrypt_done(struct crypto_async_request *areq, int err)
+static void gcm_enc_hash_done(struct crypto_async_request *areq,
+                                    int err)
 {
        struct aead_request *req = areq->data;
+       struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
 
        if (!err)
-               err = crypto_gcm_hash(req);
+               gcm_enc_copy_hash(req, pctx);
 
        aead_request_complete(req, err);
 }
 
+static void gcm_encrypt_done(struct crypto_async_request *areq,
+                                    int err)
+{
+       struct aead_request *req = areq->data;
+       struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
+
+       if (!err) {
+               err = gcm_hash(req, pctx);
+               if (err == -EINPROGRESS || err == -EBUSY)
+                       return;
+       }
+
+       gcm_enc_hash_done(areq, err);
+}
+
 static int crypto_gcm_encrypt(struct aead_request *req)
 {
-       struct ablkcipher_request abreq;
-       int err = 0;
+       struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
+       struct ablkcipher_request *abreq = &pctx->u.abreq;
+       struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
+       int err;
+
+       crypto_gcm_init_crypt(abreq, req, req->cryptlen);
+       ablkcipher_request_set_callback(abreq, aead_request_flags(req),
+                                       gcm_encrypt_done, req);
 
-       err = crypto_gcm_init_crypt(&abreq, req, req->cryptlen,
-                                   crypto_gcm_encrypt_done);
+       gctx->src = req->dst;
+       gctx->cryptlen = req->cryptlen;
+       gctx->complete = gcm_enc_hash_done;
+
+       err = crypto_ablkcipher_encrypt(abreq);
        if (err)
                return err;
 
-       if (req->cryptlen) {
-               err = crypto_ablkcipher_encrypt(&abreq);
-               if (err)
-                       return err;
-       }
+       err = gcm_hash(req, pctx);
+       if (err)
+               return err;
+
+       crypto_xor(pctx->auth_tag, pctx->iauth_tag, 16);
+       gcm_enc_copy_hash(req, pctx);
 
-       return crypto_gcm_hash(req);
+       return 0;
 }
 
-static void crypto_gcm_decrypt_done(struct crypto_async_request *areq, int err)
+static int crypto_gcm_verify(struct aead_request *req,
+                            struct crypto_gcm_req_priv_ctx *pctx)
 {
-       aead_request_complete(areq->data, err);
+       struct crypto_aead *aead = crypto_aead_reqtfm(req);
+       u8 *auth_tag = pctx->auth_tag;
+       u8 *iauth_tag = pctx->iauth_tag;
+       unsigned int authsize = crypto_aead_authsize(aead);
+       unsigned int cryptlen = req->cryptlen - authsize;
+
+       crypto_xor(auth_tag, iauth_tag, 16);
+       scatterwalk_map_and_copy(iauth_tag, req->src, cryptlen, authsize, 0);
+       return memcmp(iauth_tag, auth_tag, authsize) ? -EBADMSG : 0;
+}
+
+static void gcm_decrypt_done(struct crypto_async_request *areq, int err)
+{
+       struct aead_request *req = areq->data;
+       struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
+
+       if (!err)
+               err = crypto_gcm_verify(req, pctx);
+
+       aead_request_complete(req, err);
+}
+
+static void gcm_dec_hash_done(struct crypto_async_request *areq, int err)
+{
+       struct aead_request *req = areq->data;
+       struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
+       struct ablkcipher_request *abreq = &pctx->u.abreq;
+       struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
+
+       if (!err) {
+               ablkcipher_request_set_callback(abreq, aead_request_flags(req),
+                                               gcm_decrypt_done, req);
+               crypto_gcm_init_crypt(abreq, req, gctx->cryptlen);
+               err = crypto_ablkcipher_decrypt(abreq);
+               if (err == -EINPROGRESS || err == -EBUSY)
+                       return;
+       }
+
+       gcm_decrypt_done(areq, err);
 }
 
 static int crypto_gcm_decrypt(struct aead_request *req)
 {
-       struct ablkcipher_request abreq;
        struct crypto_aead *aead = crypto_aead_reqtfm(req);
-       struct crypto_gcm_req_priv_ctx *pctx = aead_request_ctx(req);
-       u8 *auth_tag = pctx->auth_tag;
-       u8 *iauth_tag = pctx->iauth_tag;
-       struct crypto_gcm_ghash_ctx *ghash = &pctx->ghash;
-       unsigned int cryptlen = req->cryptlen;
+       struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
+       struct ablkcipher_request *abreq = &pctx->u.abreq;
+       struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
        unsigned int authsize = crypto_aead_authsize(aead);
+       unsigned int cryptlen = req->cryptlen;
        int err;
 
        if (cryptlen < authsize)
                return -EINVAL;
        cryptlen -= authsize;
 
-       err = crypto_gcm_init_crypt(&abreq, req, cryptlen,
-                                   crypto_gcm_decrypt_done);
+       gctx->src = req->src;
+       gctx->cryptlen = cryptlen;
+       gctx->complete = gcm_dec_hash_done;
+
+       err = gcm_hash(req, pctx);
        if (err)
                return err;
 
-       crypto_gcm_ghash_update_sg(ghash, req->src, cryptlen);
-       crypto_gcm_ghash_final_xor(ghash, req->assoclen, cryptlen, auth_tag);
-
-       scatterwalk_map_and_copy(iauth_tag, req->src, cryptlen, authsize, 0);
-       if (memcmp(iauth_tag, auth_tag, authsize))
-               return -EBADMSG;
+       ablkcipher_request_set_callback(abreq, aead_request_flags(req),
+                                       gcm_decrypt_done, req);
+       crypto_gcm_init_crypt(abreq, req, cryptlen);
+       err = crypto_ablkcipher_decrypt(abreq);
+       if (err)
+               return err;
 
-       return crypto_ablkcipher_decrypt(&abreq);
+       return crypto_gcm_verify(req, pctx);
 }
 
 static int crypto_gcm_init_tfm(struct crypto_tfm *tfm)
@@ -338,117 +595,173 @@ static int crypto_gcm_init_tfm(struct crypto_tfm *tfm)
        struct gcm_instance_ctx *ictx = crypto_instance_ctx(inst);
        struct crypto_gcm_ctx *ctx = crypto_tfm_ctx(tfm);
        struct crypto_ablkcipher *ctr;
+       struct crypto_ahash *ghash;
        unsigned long align;
        int err;
 
-       ctr = crypto_spawn_ablkcipher(&ictx->ctr);
+       ghash = crypto_spawn_ahash(&ictx->ghash);
+       if (IS_ERR(ghash))
+               return PTR_ERR(ghash);
+
+       ctr = crypto_spawn_skcipher(&ictx->ctr);
        err = PTR_ERR(ctr);
        if (IS_ERR(ctr))
-               return err;
+               goto err_free_hash;
 
        ctx->ctr = ctr;
-       ctx->gf128 = NULL;
+       ctx->ghash = ghash;
 
-       align = max_t(unsigned long, crypto_ablkcipher_alignmask(ctr),
-                     __alignof__(u32) - 1);
+       align = crypto_tfm_alg_alignmask(tfm);
        align &= ~(crypto_tfm_ctx_alignment() - 1);
-       tfm->crt_aead.reqsize = align + sizeof(struct crypto_gcm_req_priv_ctx);
+       tfm->crt_aead.reqsize = align +
+               offsetof(struct crypto_gcm_req_priv_ctx, u) +
+               max(sizeof(struct ablkcipher_request) +
+                   crypto_ablkcipher_reqsize(ctr),
+                   sizeof(struct ahash_request) +
+                   crypto_ahash_reqsize(ghash));
 
        return 0;
+
+err_free_hash:
+       crypto_free_ahash(ghash);
+       return err;
 }
 
 static void crypto_gcm_exit_tfm(struct crypto_tfm *tfm)
 {
        struct crypto_gcm_ctx *ctx = crypto_tfm_ctx(tfm);
 
-       if (ctx->gf128 != NULL)
-               gf128mul_free_4k(ctx->gf128);
-
+       crypto_free_ahash(ctx->ghash);
        crypto_free_ablkcipher(ctx->ctr);
 }
 
-static struct crypto_instance *crypto_gcm_alloc(struct rtattr **tb)
+static struct crypto_instance *crypto_gcm_alloc_common(struct rtattr **tb,
+                                                      const char *full_name,
+                                                      const char *ctr_name,
+                                                      const char *ghash_name)
 {
+       struct crypto_attr_type *algt;
        struct crypto_instance *inst;
        struct crypto_alg *ctr;
-       struct crypto_alg *cipher;
+       struct crypto_alg *ghash_alg;
+       struct ahash_alg *ghash_ahash_alg;
        struct gcm_instance_ctx *ctx;
        int err;
-       char ctr_name[CRYPTO_MAX_ALG_NAME];
 
-       err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_AEAD);
-       if (err)
+       algt = crypto_get_attr_type(tb);
+       err = PTR_ERR(algt);
+       if (IS_ERR(algt))
                return ERR_PTR(err);
 
-       cipher = crypto_attr_alg(tb[1], CRYPTO_ALG_TYPE_CIPHER,
-                             CRYPTO_ALG_TYPE_MASK);
+       if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
+               return ERR_PTR(-EINVAL);
+
+       ghash_alg = crypto_find_alg(ghash_name, &crypto_ahash_type,
+                                   CRYPTO_ALG_TYPE_HASH,
+                                   CRYPTO_ALG_TYPE_AHASH_MASK);
+       err = PTR_ERR(ghash_alg);
+       if (IS_ERR(ghash_alg))
+               return ERR_PTR(err);
 
-       inst = ERR_PTR(PTR_ERR(cipher));
-       if (IS_ERR(cipher))
-               return inst;
+       err = -ENOMEM;
+       inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
+       if (!inst)
+               goto out_put_ghash;
 
-       inst = ERR_PTR(ENAMETOOLONG);
-       if (snprintf(
-                   ctr_name, CRYPTO_MAX_ALG_NAME,
-                   "ctr(%s,0,16,4)", cipher->cra_name) >= CRYPTO_MAX_ALG_NAME)
-               return inst;
+       ctx = crypto_instance_ctx(inst);
+       ghash_ahash_alg = container_of(ghash_alg, struct ahash_alg, halg.base);
+       err = crypto_init_ahash_spawn(&ctx->ghash, &ghash_ahash_alg->halg,
+                                     inst);
+       if (err)
+               goto err_free_inst;
 
-       ctr = crypto_alg_mod_lookup(ctr_name, CRYPTO_ALG_TYPE_BLKCIPHER,
-                                   CRYPTO_ALG_TYPE_MASK);
+       crypto_set_skcipher_spawn(&ctx->ctr, inst);
+       err = crypto_grab_skcipher(&ctx->ctr, ctr_name, 0,
+                                  crypto_requires_sync(algt->type,
+                                                       algt->mask));
+       if (err)
+               goto err_drop_ghash;
 
-       if (IS_ERR(ctr))
-               return ERR_PTR(PTR_ERR(ctr));
+       ctr = crypto_skcipher_spawn_alg(&ctx->ctr);
 
-       if (cipher->cra_blocksize != 16)
+       /* We only support 16-byte blocks. */
+       if (ctr->cra_ablkcipher.ivsize != 16)
                goto out_put_ctr;
 
-       inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
-       err = -ENOMEM;
-       if (!inst)
+       /* Not a stream cipher? */
+       err = -EINVAL;
+       if (ctr->cra_blocksize != 1)
                goto out_put_ctr;
 
        err = -ENAMETOOLONG;
-       if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME,
-                    "gcm(%s)", cipher->cra_name) >= CRYPTO_MAX_ALG_NAME ||
-           snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
-                    "gcm(%s)", cipher->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
-               goto err_free_inst;
-
+       if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
+                    "gcm_base(%s,%s)", ctr->cra_driver_name,
+                    ghash_alg->cra_driver_name) >=
+           CRYPTO_MAX_ALG_NAME)
+               goto out_put_ctr;
 
-       ctx = crypto_instance_ctx(inst);
-       err = crypto_init_spawn(&ctx->ctr, ctr, inst, CRYPTO_ALG_TYPE_MASK);
-       if (err)
-               goto err_free_inst;
+       memcpy(inst->alg.cra_name, full_name, CRYPTO_MAX_ALG_NAME);
 
-       inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC;
+       inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD;
+       inst->alg.cra_flags |= ctr->cra_flags & CRYPTO_ALG_ASYNC;
        inst->alg.cra_priority = ctr->cra_priority;
-       inst->alg.cra_blocksize = 16;
-       inst->alg.cra_alignmask = __alignof__(u32) - 1;
+       inst->alg.cra_blocksize = 1;
+       inst->alg.cra_alignmask = ctr->cra_alignmask | (__alignof__(u64) - 1);
        inst->alg.cra_type = &crypto_aead_type;
-       inst->alg.cra_aead.ivsize = 12;
+       inst->alg.cra_aead.ivsize = 16;
        inst->alg.cra_aead.maxauthsize = 16;
        inst->alg.cra_ctxsize = sizeof(struct crypto_gcm_ctx);
        inst->alg.cra_init = crypto_gcm_init_tfm;
        inst->alg.cra_exit = crypto_gcm_exit_tfm;
        inst->alg.cra_aead.setkey = crypto_gcm_setkey;
+       inst->alg.cra_aead.setauthsize = crypto_gcm_setauthsize;
        inst->alg.cra_aead.encrypt = crypto_gcm_encrypt;
        inst->alg.cra_aead.decrypt = crypto_gcm_decrypt;
 
 out:
-       crypto_mod_put(ctr);
+       crypto_mod_put(ghash_alg);
        return inst;
+
+out_put_ctr:
+       crypto_drop_skcipher(&ctx->ctr);
+err_drop_ghash:
+       crypto_drop_ahash(&ctx->ghash);
 err_free_inst:
        kfree(inst);
-out_put_ctr:
+out_put_ghash:
        inst = ERR_PTR(err);
        goto out;
 }
 
+static struct crypto_instance *crypto_gcm_alloc(struct rtattr **tb)
+{
+       int err;
+       const char *cipher_name;
+       char ctr_name[CRYPTO_MAX_ALG_NAME];
+       char full_name[CRYPTO_MAX_ALG_NAME];
+
+       cipher_name = crypto_attr_alg_name(tb[1]);
+       err = PTR_ERR(cipher_name);
+       if (IS_ERR(cipher_name))
+               return ERR_PTR(err);
+
+       if (snprintf(ctr_name, CRYPTO_MAX_ALG_NAME, "ctr(%s)", cipher_name) >=
+           CRYPTO_MAX_ALG_NAME)
+               return ERR_PTR(-ENAMETOOLONG);
+
+       if (snprintf(full_name, CRYPTO_MAX_ALG_NAME, "gcm(%s)", cipher_name) >=
+           CRYPTO_MAX_ALG_NAME)
+               return ERR_PTR(-ENAMETOOLONG);
+
+       return crypto_gcm_alloc_common(tb, full_name, ctr_name, "ghash");
+}
+
 static void crypto_gcm_free(struct crypto_instance *inst)
 {
        struct gcm_instance_ctx *ctx = crypto_instance_ctx(inst);
 
-       crypto_drop_spawn(&ctx->ctr);
+       crypto_drop_skcipher(&ctx->ctr);
+       crypto_drop_ahash(&ctx->ghash);
        kfree(inst);
 }
 
@@ -459,14 +772,279 @@ static struct crypto_template crypto_gcm_tmpl = {
        .module = THIS_MODULE,
 };
 
+static struct crypto_instance *crypto_gcm_base_alloc(struct rtattr **tb)
+{
+       int err;
+       const char *ctr_name;
+       const char *ghash_name;
+       char full_name[CRYPTO_MAX_ALG_NAME];
+
+       ctr_name = crypto_attr_alg_name(tb[1]);
+       err = PTR_ERR(ctr_name);
+       if (IS_ERR(ctr_name))
+               return ERR_PTR(err);
+
+       ghash_name = crypto_attr_alg_name(tb[2]);
+       err = PTR_ERR(ghash_name);
+       if (IS_ERR(ghash_name))
+               return ERR_PTR(err);
+
+       if (snprintf(full_name, CRYPTO_MAX_ALG_NAME, "gcm_base(%s,%s)",
+                    ctr_name, ghash_name) >= CRYPTO_MAX_ALG_NAME)
+               return ERR_PTR(-ENAMETOOLONG);
+
+       return crypto_gcm_alloc_common(tb, full_name, ctr_name, ghash_name);
+}
+
+static struct crypto_template crypto_gcm_base_tmpl = {
+       .name = "gcm_base",
+       .alloc = crypto_gcm_base_alloc,
+       .free = crypto_gcm_free,
+       .module = THIS_MODULE,
+};
+
+static int crypto_rfc4106_setkey(struct crypto_aead *parent, const u8 *key,
+                                unsigned int keylen)
+{
+       struct crypto_rfc4106_ctx *ctx = crypto_aead_ctx(parent);
+       struct crypto_aead *child = ctx->child;
+       int err;
+
+       if (keylen < 4)
+               return -EINVAL;
+
+       keylen -= 4;
+       memcpy(ctx->nonce, key + keylen, 4);
+
+       crypto_aead_clear_flags(child, CRYPTO_TFM_REQ_MASK);
+       crypto_aead_set_flags(child, crypto_aead_get_flags(parent) &
+                                    CRYPTO_TFM_REQ_MASK);
+       err = crypto_aead_setkey(child, key, keylen);
+       crypto_aead_set_flags(parent, crypto_aead_get_flags(child) &
+                                     CRYPTO_TFM_RES_MASK);
+
+       return err;
+}
+
+static int crypto_rfc4106_setauthsize(struct crypto_aead *parent,
+                                     unsigned int authsize)
+{
+       struct crypto_rfc4106_ctx *ctx = crypto_aead_ctx(parent);
+
+       switch (authsize) {
+       case 8:
+       case 12:
+       case 16:
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       return crypto_aead_setauthsize(ctx->child, authsize);
+}
+
+static struct aead_request *crypto_rfc4106_crypt(struct aead_request *req)
+{
+       struct aead_request *subreq = aead_request_ctx(req);
+       struct crypto_aead *aead = crypto_aead_reqtfm(req);
+       struct crypto_rfc4106_ctx *ctx = crypto_aead_ctx(aead);
+       struct crypto_aead *child = ctx->child;
+       u8 *iv = PTR_ALIGN((u8 *)(subreq + 1) + crypto_aead_reqsize(child),
+                          crypto_aead_alignmask(child) + 1);
+
+       memcpy(iv, ctx->nonce, 4);
+       memcpy(iv + 4, req->iv, 8);
+
+       aead_request_set_tfm(subreq, child);
+       aead_request_set_callback(subreq, req->base.flags, req->base.complete,
+                                 req->base.data);
+       aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen, iv);
+       aead_request_set_assoc(subreq, req->assoc, req->assoclen);
+
+       return subreq;
+}
+
+static int crypto_rfc4106_encrypt(struct aead_request *req)
+{
+       req = crypto_rfc4106_crypt(req);
+
+       return crypto_aead_encrypt(req);
+}
+
+static int crypto_rfc4106_decrypt(struct aead_request *req)
+{
+       req = crypto_rfc4106_crypt(req);
+
+       return crypto_aead_decrypt(req);
+}
+
+static int crypto_rfc4106_init_tfm(struct crypto_tfm *tfm)
+{
+       struct crypto_instance *inst = (void *)tfm->__crt_alg;
+       struct crypto_aead_spawn *spawn = crypto_instance_ctx(inst);
+       struct crypto_rfc4106_ctx *ctx = crypto_tfm_ctx(tfm);
+       struct crypto_aead *aead;
+       unsigned long align;
+
+       aead = crypto_spawn_aead(spawn);
+       if (IS_ERR(aead))
+               return PTR_ERR(aead);
+
+       ctx->child = aead;
+
+       align = crypto_aead_alignmask(aead);
+       align &= ~(crypto_tfm_ctx_alignment() - 1);
+       tfm->crt_aead.reqsize = sizeof(struct aead_request) +
+                               ALIGN(crypto_aead_reqsize(aead),
+                                     crypto_tfm_ctx_alignment()) +
+                               align + 16;
+
+       return 0;
+}
+
+static void crypto_rfc4106_exit_tfm(struct crypto_tfm *tfm)
+{
+       struct crypto_rfc4106_ctx *ctx = crypto_tfm_ctx(tfm);
+
+       crypto_free_aead(ctx->child);
+}
+
+static struct crypto_instance *crypto_rfc4106_alloc(struct rtattr **tb)
+{
+       struct crypto_attr_type *algt;
+       struct crypto_instance *inst;
+       struct crypto_aead_spawn *spawn;
+       struct crypto_alg *alg;
+       const char *ccm_name;
+       int err;
+
+       algt = crypto_get_attr_type(tb);
+       err = PTR_ERR(algt);
+       if (IS_ERR(algt))
+               return ERR_PTR(err);
+
+       if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
+               return ERR_PTR(-EINVAL);
+
+       ccm_name = crypto_attr_alg_name(tb[1]);
+       err = PTR_ERR(ccm_name);
+       if (IS_ERR(ccm_name))
+               return ERR_PTR(err);
+
+       inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
+       if (!inst)
+               return ERR_PTR(-ENOMEM);
+
+       spawn = crypto_instance_ctx(inst);
+       crypto_set_aead_spawn(spawn, inst);
+       err = crypto_grab_aead(spawn, ccm_name, 0,
+                              crypto_requires_sync(algt->type, algt->mask));
+       if (err)
+               goto out_free_inst;
+
+       alg = crypto_aead_spawn_alg(spawn);
+
+       err = -EINVAL;
+
+       /* We only support 16-byte blocks. */
+       if (alg->cra_aead.ivsize != 16)
+               goto out_drop_alg;
+
+       /* Not a stream cipher? */
+       if (alg->cra_blocksize != 1)
+               goto out_drop_alg;
+
+       err = -ENAMETOOLONG;
+       if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME,
+                    "rfc4106(%s)", alg->cra_name) >= CRYPTO_MAX_ALG_NAME ||
+           snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
+                    "rfc4106(%s)", alg->cra_driver_name) >=
+           CRYPTO_MAX_ALG_NAME)
+               goto out_drop_alg;
+
+       inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD;
+       inst->alg.cra_flags |= alg->cra_flags & CRYPTO_ALG_ASYNC;
+       inst->alg.cra_priority = alg->cra_priority;
+       inst->alg.cra_blocksize = 1;
+       inst->alg.cra_alignmask = alg->cra_alignmask;
+       inst->alg.cra_type = &crypto_nivaead_type;
+
+       inst->alg.cra_aead.ivsize = 8;
+       inst->alg.cra_aead.maxauthsize = 16;
+
+       inst->alg.cra_ctxsize = sizeof(struct crypto_rfc4106_ctx);
+
+       inst->alg.cra_init = crypto_rfc4106_init_tfm;
+       inst->alg.cra_exit = crypto_rfc4106_exit_tfm;
+
+       inst->alg.cra_aead.setkey = crypto_rfc4106_setkey;
+       inst->alg.cra_aead.setauthsize = crypto_rfc4106_setauthsize;
+       inst->alg.cra_aead.encrypt = crypto_rfc4106_encrypt;
+       inst->alg.cra_aead.decrypt = crypto_rfc4106_decrypt;
+
+       inst->alg.cra_aead.geniv = "seqiv";
+
+out:
+       return inst;
+
+out_drop_alg:
+       crypto_drop_aead(spawn);
+out_free_inst:
+       kfree(inst);
+       inst = ERR_PTR(err);
+       goto out;
+}
+
+static void crypto_rfc4106_free(struct crypto_instance *inst)
+{
+       crypto_drop_spawn(crypto_instance_ctx(inst));
+       kfree(inst);
+}
+
+static struct crypto_template crypto_rfc4106_tmpl = {
+       .name = "rfc4106",
+       .alloc = crypto_rfc4106_alloc,
+       .free = crypto_rfc4106_free,
+       .module = THIS_MODULE,
+};
+
 static int __init crypto_gcm_module_init(void)
 {
-       return crypto_register_template(&crypto_gcm_tmpl);
+       int err;
+
+       gcm_zeroes = kzalloc(16, GFP_KERNEL);
+       if (!gcm_zeroes)
+               return -ENOMEM;
+
+       err = crypto_register_template(&crypto_gcm_base_tmpl);
+       if (err)
+               goto out;
+
+       err = crypto_register_template(&crypto_gcm_tmpl);
+       if (err)
+               goto out_undo_base;
+
+       err = crypto_register_template(&crypto_rfc4106_tmpl);
+       if (err)
+               goto out_undo_gcm;
+
+       return 0;
+
+out_undo_gcm:
+       crypto_unregister_template(&crypto_gcm_tmpl);
+out_undo_base:
+       crypto_unregister_template(&crypto_gcm_base_tmpl);
+out:
+       kfree(gcm_zeroes);
+       return err;
 }
 
 static void __exit crypto_gcm_module_exit(void)
 {
+       kfree(gcm_zeroes);
+       crypto_unregister_template(&crypto_rfc4106_tmpl);
        crypto_unregister_template(&crypto_gcm_tmpl);
+       crypto_unregister_template(&crypto_gcm_base_tmpl);
 }
 
 module_init(crypto_gcm_module_init);
@@ -475,3 +1053,5 @@ module_exit(crypto_gcm_module_exit);
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Galois/Counter Mode");
 MODULE_AUTHOR("Mikko Herranen <mh1@iki.fi>");
+MODULE_ALIAS("gcm_base");
+MODULE_ALIAS("rfc4106");