2007-11-26 07:24:11 -07:00
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/*
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* GCM: Galois/Counter Mode.
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*
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* Copyright (c) 2007 Nokia Siemens Networks - Mikko Herranen <mh1@iki.fi>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*/
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#include <crypto/gf128mul.h>
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2007-12-17 00:33:17 -07:00
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#include <crypto/internal/aead.h>
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2007-12-07 04:26:11 -07:00
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#include <crypto/internal/skcipher.h>
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2009-08-05 23:34:26 -06:00
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#include <crypto/internal/hash.h>
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2007-12-07 03:52:49 -07:00
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#include <crypto/scatterwalk.h>
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2009-08-05 23:34:26 -06:00
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#include <crypto/hash.h>
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#include "internal.h"
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2007-12-17 06:42:08 -07:00
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#include <linux/completion.h>
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2007-11-26 07:24:11 -07:00
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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struct gcm_instance_ctx {
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2007-12-07 04:26:11 -07:00
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struct crypto_skcipher_spawn ctr;
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2009-08-05 23:34:26 -06:00
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struct crypto_ahash_spawn ghash;
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2007-11-26 07:24:11 -07:00
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};
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struct crypto_gcm_ctx {
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struct crypto_ablkcipher *ctr;
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2009-08-05 23:34:26 -06:00
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struct crypto_ahash *ghash;
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2007-11-26 07:24:11 -07:00
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};
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2007-12-17 00:33:17 -07:00
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struct crypto_rfc4106_ctx {
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struct crypto_aead *child;
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u8 nonce[4];
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};
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2010-01-17 03:52:11 -07:00
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struct crypto_rfc4543_ctx {
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struct crypto_aead *child;
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u8 nonce[4];
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};
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struct crypto_rfc4543_req_ctx {
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u8 auth_tag[16];
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struct scatterlist cipher[1];
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struct scatterlist payload[2];
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struct scatterlist assoc[2];
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struct aead_request subreq;
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};
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2007-11-26 07:24:11 -07:00
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struct crypto_gcm_ghash_ctx {
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2009-08-05 23:34:26 -06:00
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unsigned int cryptlen;
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struct scatterlist *src;
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2009-11-16 06:52:22 -07:00
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void (*complete)(struct aead_request *req, int err);
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2007-11-26 07:24:11 -07:00
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};
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struct crypto_gcm_req_priv_ctx {
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u8 auth_tag[16];
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2007-12-04 01:17:50 -07:00
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u8 iauth_tag[16];
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2007-12-17 06:42:08 -07:00
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struct scatterlist src[2];
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struct scatterlist dst[2];
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2009-08-05 23:34:26 -06:00
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struct crypto_gcm_ghash_ctx ghash_ctx;
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union {
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struct ahash_request ahreq;
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struct ablkcipher_request abreq;
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} u;
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2007-11-26 07:24:11 -07:00
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};
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2007-12-17 06:42:08 -07:00
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struct crypto_gcm_setkey_result {
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int err;
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struct completion completion;
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};
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2009-08-05 23:34:26 -06:00
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static void *gcm_zeroes;
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2007-12-12 04:16:38 -07:00
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static inline struct crypto_gcm_req_priv_ctx *crypto_gcm_reqctx(
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struct aead_request *req)
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{
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unsigned long align = crypto_aead_alignmask(crypto_aead_reqtfm(req));
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return (void *)PTR_ALIGN((u8 *)aead_request_ctx(req), align + 1);
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}
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2007-12-17 06:42:08 -07:00
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static void crypto_gcm_setkey_done(struct crypto_async_request *req, int err)
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2007-11-26 07:24:11 -07:00
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{
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2007-12-17 06:42:08 -07:00
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struct crypto_gcm_setkey_result *result = req->data;
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2007-11-26 07:24:11 -07:00
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2007-12-17 06:42:08 -07:00
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if (err == -EINPROGRESS)
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return;
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result->err = err;
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complete(&result->completion);
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2007-11-26 07:24:11 -07:00
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}
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static int crypto_gcm_setkey(struct crypto_aead *aead, const u8 *key,
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unsigned int keylen)
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{
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struct crypto_gcm_ctx *ctx = crypto_aead_ctx(aead);
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2009-08-05 23:34:26 -06:00
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struct crypto_ahash *ghash = ctx->ghash;
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2007-11-26 07:24:11 -07:00
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struct crypto_ablkcipher *ctr = ctx->ctr;
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2007-12-17 06:42:08 -07:00
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struct {
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be128 hash;
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u8 iv[8];
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struct crypto_gcm_setkey_result result;
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struct scatterlist sg[1];
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struct ablkcipher_request req;
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} *data;
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int err;
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2007-11-26 07:24:11 -07:00
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crypto_ablkcipher_clear_flags(ctr, CRYPTO_TFM_REQ_MASK);
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crypto_ablkcipher_set_flags(ctr, crypto_aead_get_flags(aead) &
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CRYPTO_TFM_REQ_MASK);
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err = crypto_ablkcipher_setkey(ctr, key, keylen);
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if (err)
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2007-12-17 06:42:08 -07:00
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return err;
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2007-11-26 07:24:11 -07:00
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crypto_aead_set_flags(aead, crypto_ablkcipher_get_flags(ctr) &
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CRYPTO_TFM_RES_MASK);
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2007-12-17 06:42:08 -07:00
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data = kzalloc(sizeof(*data) + crypto_ablkcipher_reqsize(ctr),
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GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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init_completion(&data->result.completion);
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sg_init_one(data->sg, &data->hash, sizeof(data->hash));
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ablkcipher_request_set_tfm(&data->req, ctr);
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ablkcipher_request_set_callback(&data->req, CRYPTO_TFM_REQ_MAY_SLEEP |
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CRYPTO_TFM_REQ_MAY_BACKLOG,
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crypto_gcm_setkey_done,
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&data->result);
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ablkcipher_request_set_crypt(&data->req, data->sg, data->sg,
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sizeof(data->hash), data->iv);
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err = crypto_ablkcipher_encrypt(&data->req);
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if (err == -EINPROGRESS || err == -EBUSY) {
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err = wait_for_completion_interruptible(
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&data->result.completion);
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if (!err)
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err = data->result.err;
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}
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2007-11-26 07:24:11 -07:00
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if (err)
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goto out;
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2009-08-05 23:34:26 -06:00
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crypto_ahash_clear_flags(ghash, CRYPTO_TFM_REQ_MASK);
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crypto_ahash_set_flags(ghash, crypto_aead_get_flags(aead) &
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CRYPTO_TFM_REQ_MASK);
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err = crypto_ahash_setkey(ghash, (u8 *)&data->hash, sizeof(be128));
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crypto_aead_set_flags(aead, crypto_ahash_get_flags(ghash) &
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CRYPTO_TFM_RES_MASK);
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2007-11-26 07:24:11 -07:00
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2007-12-17 06:42:08 -07:00
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out:
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kfree(data);
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2007-11-26 07:24:11 -07:00
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return err;
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}
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2007-12-17 00:33:17 -07:00
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static int crypto_gcm_setauthsize(struct crypto_aead *tfm,
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unsigned int authsize)
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{
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switch (authsize) {
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case 4:
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case 8:
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case 12:
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case 13:
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case 14:
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case 15:
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case 16:
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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2007-12-17 06:42:08 -07:00
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static void crypto_gcm_init_crypt(struct ablkcipher_request *ablk_req,
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struct aead_request *req,
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unsigned int cryptlen)
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2007-11-26 07:24:11 -07:00
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{
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struct crypto_aead *aead = crypto_aead_reqtfm(req);
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struct crypto_gcm_ctx *ctx = crypto_aead_ctx(aead);
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2007-12-12 04:16:38 -07:00
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struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
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2007-12-17 06:42:08 -07:00
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struct scatterlist *dst;
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__be32 counter = cpu_to_be32(1);
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memset(pctx->auth_tag, 0, sizeof(pctx->auth_tag));
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memcpy(req->iv + 12, &counter, 4);
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sg_init_table(pctx->src, 2);
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sg_set_buf(pctx->src, pctx->auth_tag, sizeof(pctx->auth_tag));
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scatterwalk_sg_chain(pctx->src, 2, req->src);
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dst = pctx->src;
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if (req->src != req->dst) {
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sg_init_table(pctx->dst, 2);
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sg_set_buf(pctx->dst, pctx->auth_tag, sizeof(pctx->auth_tag));
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scatterwalk_sg_chain(pctx->dst, 2, req->dst);
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dst = pctx->dst;
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}
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2007-11-26 07:24:11 -07:00
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ablkcipher_request_set_tfm(ablk_req, ctx->ctr);
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2007-12-17 06:42:08 -07:00
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ablkcipher_request_set_crypt(ablk_req, pctx->src, dst,
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cryptlen + sizeof(pctx->auth_tag),
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req->iv);
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2009-08-05 23:34:26 -06:00
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}
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static inline unsigned int gcm_remain(unsigned int len)
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{
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len &= 0xfU;
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return len ? 16 - len : 0;
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}
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static void gcm_hash_len_done(struct crypto_async_request *areq, int err);
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static void gcm_hash_final_done(struct crypto_async_request *areq, int err);
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2007-11-26 07:24:11 -07:00
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2009-08-05 23:34:26 -06:00
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static int gcm_hash_update(struct aead_request *req,
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struct crypto_gcm_req_priv_ctx *pctx,
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crypto_completion_t complete,
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struct scatterlist *src,
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unsigned int len)
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{
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struct ahash_request *ahreq = &pctx->u.ahreq;
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2007-11-26 07:24:11 -07:00
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2009-08-05 23:34:26 -06:00
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ahash_request_set_callback(ahreq, aead_request_flags(req),
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complete, req);
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ahash_request_set_crypt(ahreq, src, NULL, len);
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return crypto_ahash_update(ahreq);
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2007-11-26 07:24:11 -07:00
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}
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2009-08-05 23:34:26 -06:00
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static int gcm_hash_remain(struct aead_request *req,
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struct crypto_gcm_req_priv_ctx *pctx,
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unsigned int remain,
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crypto_completion_t complete)
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2007-11-26 07:24:11 -07:00
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{
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2009-08-05 23:34:26 -06:00
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struct ahash_request *ahreq = &pctx->u.ahreq;
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ahash_request_set_callback(ahreq, aead_request_flags(req),
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complete, req);
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sg_init_one(pctx->src, gcm_zeroes, remain);
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ahash_request_set_crypt(ahreq, pctx->src, NULL, remain);
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return crypto_ahash_update(ahreq);
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}
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static int gcm_hash_len(struct aead_request *req,
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struct crypto_gcm_req_priv_ctx *pctx)
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{
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struct ahash_request *ahreq = &pctx->u.ahreq;
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struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
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u128 lengths;
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lengths.a = cpu_to_be64(req->assoclen * 8);
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lengths.b = cpu_to_be64(gctx->cryptlen * 8);
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memcpy(pctx->iauth_tag, &lengths, 16);
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sg_init_one(pctx->src, pctx->iauth_tag, 16);
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ahash_request_set_callback(ahreq, aead_request_flags(req),
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gcm_hash_len_done, req);
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ahash_request_set_crypt(ahreq, pctx->src,
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NULL, sizeof(lengths));
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return crypto_ahash_update(ahreq);
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}
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static int gcm_hash_final(struct aead_request *req,
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struct crypto_gcm_req_priv_ctx *pctx)
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{
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struct ahash_request *ahreq = &pctx->u.ahreq;
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ahash_request_set_callback(ahreq, aead_request_flags(req),
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gcm_hash_final_done, req);
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ahash_request_set_crypt(ahreq, NULL, pctx->iauth_tag, 0);
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return crypto_ahash_final(ahreq);
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}
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2009-11-16 06:52:22 -07:00
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static void __gcm_hash_final_done(struct aead_request *req, int err)
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2009-08-05 23:34:26 -06:00
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{
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2007-12-12 04:16:38 -07:00
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struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
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2009-08-05 23:34:26 -06:00
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struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
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if (!err)
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crypto_xor(pctx->auth_tag, pctx->iauth_tag, 16);
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2007-11-26 07:24:11 -07:00
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2009-11-16 06:52:22 -07:00
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gctx->complete(req, err);
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2009-08-05 23:34:26 -06:00
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}
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2009-11-16 06:52:22 -07:00
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static void gcm_hash_final_done(struct crypto_async_request *areq, int err)
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2009-08-05 23:34:26 -06:00
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{
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struct aead_request *req = areq->data;
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2009-11-16 06:52:22 -07:00
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__gcm_hash_final_done(req, err);
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}
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static void __gcm_hash_len_done(struct aead_request *req, int err)
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{
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2009-08-05 23:34:26 -06:00
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struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
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if (!err) {
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err = gcm_hash_final(req, pctx);
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if (err == -EINPROGRESS || err == -EBUSY)
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return;
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}
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2009-11-16 06:52:22 -07:00
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__gcm_hash_final_done(req, err);
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2009-08-05 23:34:26 -06:00
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}
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2009-11-16 06:52:22 -07:00
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static void gcm_hash_len_done(struct crypto_async_request *areq, int err)
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2009-08-05 23:34:26 -06:00
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{
|
|
|
|
struct aead_request *req = areq->data;
|
2009-11-16 06:52:22 -07:00
|
|
|
|
|
|
|
__gcm_hash_len_done(req, err);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __gcm_hash_crypt_remain_done(struct aead_request *req, int err)
|
|
|
|
{
|
2009-08-05 23:34:26 -06:00
|
|
|
struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
|
|
|
|
|
|
|
|
if (!err) {
|
|
|
|
err = gcm_hash_len(req, pctx);
|
|
|
|
if (err == -EINPROGRESS || err == -EBUSY)
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2009-11-16 06:52:22 -07:00
|
|
|
__gcm_hash_len_done(req, err);
|
2009-08-05 23:34:26 -06:00
|
|
|
}
|
|
|
|
|
2009-11-16 06:52:22 -07:00
|
|
|
static void gcm_hash_crypt_remain_done(struct crypto_async_request *areq,
|
|
|
|
int err)
|
2009-08-05 23:34:26 -06:00
|
|
|
{
|
|
|
|
struct aead_request *req = areq->data;
|
2009-11-16 06:52:22 -07:00
|
|
|
|
|
|
|
__gcm_hash_crypt_remain_done(req, err);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __gcm_hash_crypt_done(struct aead_request *req, int err)
|
|
|
|
{
|
2009-08-05 23:34:26 -06:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2009-11-16 06:52:22 -07:00
|
|
|
__gcm_hash_crypt_remain_done(req, err);
|
2009-08-05 23:34:26 -06:00
|
|
|
}
|
|
|
|
|
2009-11-16 06:52:22 -07:00
|
|
|
static void gcm_hash_crypt_done(struct crypto_async_request *areq, int err)
|
2009-08-05 23:34:26 -06:00
|
|
|
{
|
|
|
|
struct aead_request *req = areq->data;
|
2009-11-16 06:52:22 -07:00
|
|
|
|
|
|
|
__gcm_hash_crypt_done(req, err);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __gcm_hash_assoc_remain_done(struct aead_request *req, int err)
|
|
|
|
{
|
2009-08-05 23:34:26 -06:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (remain)
|
2009-11-16 06:52:22 -07:00
|
|
|
__gcm_hash_crypt_done(req, err);
|
2009-08-05 23:34:26 -06:00
|
|
|
else
|
2009-11-16 06:52:22 -07:00
|
|
|
__gcm_hash_crypt_remain_done(req, err);
|
2009-08-05 23:34:26 -06:00
|
|
|
}
|
|
|
|
|
2009-11-16 06:52:22 -07:00
|
|
|
static void gcm_hash_assoc_remain_done(struct crypto_async_request *areq,
|
|
|
|
int err)
|
2009-08-05 23:34:26 -06:00
|
|
|
{
|
|
|
|
struct aead_request *req = areq->data;
|
2009-11-16 06:52:22 -07:00
|
|
|
|
|
|
|
__gcm_hash_assoc_remain_done(req, err);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __gcm_hash_assoc_done(struct aead_request *req, int err)
|
|
|
|
{
|
2009-08-05 23:34:26 -06:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2009-11-16 06:52:22 -07:00
|
|
|
__gcm_hash_assoc_remain_done(req, err);
|
2009-08-05 23:34:26 -06:00
|
|
|
}
|
|
|
|
|
2009-11-16 06:52:22 -07:00
|
|
|
static void gcm_hash_assoc_done(struct crypto_async_request *areq, int err)
|
2009-08-05 23:34:26 -06:00
|
|
|
{
|
|
|
|
struct aead_request *req = areq->data;
|
2009-11-16 06:52:22 -07:00
|
|
|
|
|
|
|
__gcm_hash_assoc_done(req, err);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __gcm_hash_init_done(struct aead_request *req, int err)
|
|
|
|
{
|
2009-08-05 23:34:26 -06:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (remain)
|
2009-11-16 06:52:22 -07:00
|
|
|
__gcm_hash_assoc_done(req, err);
|
2009-08-05 23:34:26 -06:00
|
|
|
else
|
2009-11-16 06:52:22 -07:00
|
|
|
__gcm_hash_assoc_remain_done(req, err);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void gcm_hash_init_done(struct crypto_async_request *areq, int err)
|
|
|
|
{
|
|
|
|
struct aead_request *req = areq->data;
|
|
|
|
|
|
|
|
__gcm_hash_init_done(req, err);
|
2009-08-05 23:34:26 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
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;
|
|
|
|
|
|
|
|
ahash_request_set_tfm(ahreq, ctx->ghash);
|
|
|
|
|
|
|
|
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 void gcm_enc_copy_hash(struct aead_request *req,
|
|
|
|
struct crypto_gcm_req_priv_ctx *pctx)
|
|
|
|
{
|
|
|
|
struct crypto_aead *aead = crypto_aead_reqtfm(req);
|
|
|
|
u8 *auth_tag = pctx->auth_tag;
|
2007-11-26 07:24:11 -07:00
|
|
|
|
2007-12-04 01:17:50 -07:00
|
|
|
scatterwalk_map_and_copy(auth_tag, req->dst, req->cryptlen,
|
|
|
|
crypto_aead_authsize(aead), 1);
|
|
|
|
}
|
|
|
|
|
2009-11-16 06:52:22 -07:00
|
|
|
static void gcm_enc_hash_done(struct aead_request *req, int err)
|
2007-12-04 01:17:50 -07:00
|
|
|
{
|
2009-08-05 23:34:26 -06:00
|
|
|
struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
|
2007-12-04 01:17:50 -07:00
|
|
|
|
|
|
|
if (!err)
|
2009-08-05 23:34:26 -06:00
|
|
|
gcm_enc_copy_hash(req, pctx);
|
2007-12-04 01:17:50 -07:00
|
|
|
|
2007-11-26 07:24:11 -07:00
|
|
|
aead_request_complete(req, err);
|
|
|
|
}
|
|
|
|
|
2009-11-16 06:52:22 -07:00
|
|
|
static void gcm_encrypt_done(struct crypto_async_request *areq, int err)
|
2009-08-05 23:34:26 -06:00
|
|
|
{
|
|
|
|
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;
|
2009-11-16 06:52:22 -07:00
|
|
|
else if (!err) {
|
|
|
|
crypto_xor(pctx->auth_tag, pctx->iauth_tag, 16);
|
|
|
|
gcm_enc_copy_hash(req, pctx);
|
|
|
|
}
|
2009-08-05 23:34:26 -06:00
|
|
|
}
|
|
|
|
|
2009-11-16 06:52:22 -07:00
|
|
|
aead_request_complete(req, err);
|
2009-08-05 23:34:26 -06:00
|
|
|
}
|
|
|
|
|
2007-11-26 07:24:11 -07:00
|
|
|
static int crypto_gcm_encrypt(struct aead_request *req)
|
|
|
|
{
|
2007-12-12 04:16:38 -07:00
|
|
|
struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
|
2009-08-05 23:34:26 -06:00
|
|
|
struct ablkcipher_request *abreq = &pctx->u.abreq;
|
|
|
|
struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
|
2007-12-17 06:42:08 -07:00
|
|
|
int err;
|
|
|
|
|
|
|
|
crypto_gcm_init_crypt(abreq, req, req->cryptlen);
|
|
|
|
ablkcipher_request_set_callback(abreq, aead_request_flags(req),
|
2009-08-05 23:34:26 -06:00
|
|
|
gcm_encrypt_done, req);
|
|
|
|
|
|
|
|
gctx->src = req->dst;
|
|
|
|
gctx->cryptlen = req->cryptlen;
|
|
|
|
gctx->complete = gcm_enc_hash_done;
|
2007-11-26 07:24:11 -07:00
|
|
|
|
2007-12-17 06:42:08 -07:00
|
|
|
err = crypto_ablkcipher_encrypt(abreq);
|
2007-11-26 07:24:11 -07:00
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
2009-08-05 23:34:26 -06:00
|
|
|
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 0;
|
2007-11-26 07:24:11 -07:00
|
|
|
}
|
|
|
|
|
2009-08-05 23:34:26 -06:00
|
|
|
static int crypto_gcm_verify(struct aead_request *req,
|
|
|
|
struct crypto_gcm_req_priv_ctx *pctx)
|
2007-12-17 06:42:08 -07:00
|
|
|
{
|
|
|
|
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;
|
|
|
|
|
2009-08-05 23:34:26 -06:00
|
|
|
crypto_xor(auth_tag, iauth_tag, 16);
|
2007-12-17 06:42:08 -07:00
|
|
|
scatterwalk_map_and_copy(iauth_tag, req->src, cryptlen, authsize, 0);
|
|
|
|
return memcmp(iauth_tag, auth_tag, authsize) ? -EBADMSG : 0;
|
|
|
|
}
|
|
|
|
|
2009-08-05 23:34:26 -06:00
|
|
|
static void gcm_decrypt_done(struct crypto_async_request *areq, int err)
|
2007-11-26 07:24:11 -07:00
|
|
|
{
|
2007-12-17 06:42:08 -07:00
|
|
|
struct aead_request *req = areq->data;
|
2009-08-05 23:34:26 -06:00
|
|
|
struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
|
2007-12-17 06:42:08 -07:00
|
|
|
|
|
|
|
if (!err)
|
2009-08-05 23:34:26 -06:00
|
|
|
err = crypto_gcm_verify(req, pctx);
|
2007-12-17 06:42:08 -07:00
|
|
|
|
|
|
|
aead_request_complete(req, err);
|
2007-11-26 07:24:11 -07:00
|
|
|
}
|
|
|
|
|
2009-11-16 06:52:22 -07:00
|
|
|
static void gcm_dec_hash_done(struct aead_request *req, int err)
|
2009-08-05 23:34:26 -06:00
|
|
|
{
|
|
|
|
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;
|
2009-11-16 06:52:22 -07:00
|
|
|
else if (!err)
|
|
|
|
err = crypto_gcm_verify(req, pctx);
|
2009-08-05 23:34:26 -06:00
|
|
|
}
|
|
|
|
|
2009-11-16 06:52:22 -07:00
|
|
|
aead_request_complete(req, err);
|
2009-08-05 23:34:26 -06:00
|
|
|
}
|
|
|
|
|
2007-11-26 07:24:11 -07:00
|
|
|
static int crypto_gcm_decrypt(struct aead_request *req)
|
|
|
|
{
|
2007-12-04 01:17:50 -07:00
|
|
|
struct crypto_aead *aead = crypto_aead_reqtfm(req);
|
2007-12-12 04:16:38 -07:00
|
|
|
struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
|
2009-08-05 23:34:26 -06:00
|
|
|
struct ablkcipher_request *abreq = &pctx->u.abreq;
|
|
|
|
struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
|
2007-12-04 01:17:50 -07:00
|
|
|
unsigned int authsize = crypto_aead_authsize(aead);
|
2009-08-05 23:34:26 -06:00
|
|
|
unsigned int cryptlen = req->cryptlen;
|
2007-11-26 07:24:11 -07:00
|
|
|
int err;
|
|
|
|
|
2007-12-04 01:17:50 -07:00
|
|
|
if (cryptlen < authsize)
|
2007-11-26 07:24:11 -07:00
|
|
|
return -EINVAL;
|
2007-12-04 01:17:50 -07:00
|
|
|
cryptlen -= authsize;
|
2007-11-26 07:24:11 -07:00
|
|
|
|
2009-08-05 23:34:26 -06:00
|
|
|
gctx->src = req->src;
|
|
|
|
gctx->cryptlen = cryptlen;
|
|
|
|
gctx->complete = gcm_dec_hash_done;
|
2007-11-26 07:24:11 -07:00
|
|
|
|
2009-08-05 23:34:26 -06:00
|
|
|
err = gcm_hash(req, pctx);
|
|
|
|
if (err)
|
|
|
|
return err;
|
2007-11-26 07:24:11 -07:00
|
|
|
|
2009-08-05 23:34:26 -06:00
|
|
|
ablkcipher_request_set_callback(abreq, aead_request_flags(req),
|
|
|
|
gcm_decrypt_done, req);
|
|
|
|
crypto_gcm_init_crypt(abreq, req, cryptlen);
|
2007-12-17 06:42:08 -07:00
|
|
|
err = crypto_ablkcipher_decrypt(abreq);
|
|
|
|
if (err)
|
|
|
|
return err;
|
2007-11-26 07:24:11 -07:00
|
|
|
|
2009-08-05 23:34:26 -06:00
|
|
|
return crypto_gcm_verify(req, pctx);
|
2007-11-26 07:24:11 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static int crypto_gcm_init_tfm(struct crypto_tfm *tfm)
|
|
|
|
{
|
|
|
|
struct crypto_instance *inst = (void *)tfm->__crt_alg;
|
|
|
|
struct gcm_instance_ctx *ictx = crypto_instance_ctx(inst);
|
|
|
|
struct crypto_gcm_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
|
|
struct crypto_ablkcipher *ctr;
|
2009-08-05 23:34:26 -06:00
|
|
|
struct crypto_ahash *ghash;
|
2007-11-26 07:24:11 -07:00
|
|
|
unsigned long align;
|
|
|
|
int err;
|
|
|
|
|
2009-08-05 23:34:26 -06:00
|
|
|
ghash = crypto_spawn_ahash(&ictx->ghash);
|
|
|
|
if (IS_ERR(ghash))
|
|
|
|
return PTR_ERR(ghash);
|
|
|
|
|
2007-12-07 04:26:11 -07:00
|
|
|
ctr = crypto_spawn_skcipher(&ictx->ctr);
|
2007-11-26 07:24:11 -07:00
|
|
|
err = PTR_ERR(ctr);
|
|
|
|
if (IS_ERR(ctr))
|
2009-08-05 23:34:26 -06:00
|
|
|
goto err_free_hash;
|
2007-11-26 07:24:11 -07:00
|
|
|
|
|
|
|
ctx->ctr = ctr;
|
2009-08-05 23:34:26 -06:00
|
|
|
ctx->ghash = ghash;
|
2007-11-26 07:24:11 -07:00
|
|
|
|
2007-12-12 04:16:38 -07:00
|
|
|
align = crypto_tfm_alg_alignmask(tfm);
|
2007-11-26 07:24:11 -07:00
|
|
|
align &= ~(crypto_tfm_ctx_alignment() - 1);
|
2007-12-05 23:59:53 -07:00
|
|
|
tfm->crt_aead.reqsize = align +
|
2009-08-05 23:34:26 -06:00
|
|
|
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));
|
2007-11-26 07:24:11 -07:00
|
|
|
|
|
|
|
return 0;
|
2009-08-05 23:34:26 -06:00
|
|
|
|
|
|
|
err_free_hash:
|
|
|
|
crypto_free_ahash(ghash);
|
|
|
|
return err;
|
2007-11-26 07:24:11 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void crypto_gcm_exit_tfm(struct crypto_tfm *tfm)
|
|
|
|
{
|
|
|
|
struct crypto_gcm_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
|
|
|
2009-08-05 23:34:26 -06:00
|
|
|
crypto_free_ahash(ctx->ghash);
|
2007-11-26 07:24:11 -07:00
|
|
|
crypto_free_ablkcipher(ctx->ctr);
|
|
|
|
}
|
|
|
|
|
2007-12-07 05:31:10 -07:00
|
|
|
static struct crypto_instance *crypto_gcm_alloc_common(struct rtattr **tb,
|
|
|
|
const char *full_name,
|
2009-08-05 23:34:26 -06:00
|
|
|
const char *ctr_name,
|
|
|
|
const char *ghash_name)
|
2007-11-26 07:24:11 -07:00
|
|
|
{
|
2007-12-07 05:31:10 -07:00
|
|
|
struct crypto_attr_type *algt;
|
2007-11-26 07:24:11 -07:00
|
|
|
struct crypto_instance *inst;
|
|
|
|
struct crypto_alg *ctr;
|
2009-08-05 23:34:26 -06:00
|
|
|
struct crypto_alg *ghash_alg;
|
|
|
|
struct ahash_alg *ghash_ahash_alg;
|
2007-11-26 07:24:11 -07:00
|
|
|
struct gcm_instance_ctx *ctx;
|
|
|
|
int err;
|
|
|
|
|
2007-12-07 05:31:10 -07:00
|
|
|
algt = crypto_get_attr_type(tb);
|
|
|
|
if (IS_ERR(algt))
|
2013-01-22 04:29:26 -07:00
|
|
|
return ERR_CAST(algt);
|
2007-11-26 07:24:11 -07:00
|
|
|
|
2007-12-07 05:31:10 -07:00
|
|
|
if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
|
|
|
|
return ERR_PTR(-EINVAL);
|
2007-11-26 07:24:11 -07:00
|
|
|
|
2009-08-05 23:34:26 -06:00
|
|
|
ghash_alg = crypto_find_alg(ghash_name, &crypto_ahash_type,
|
|
|
|
CRYPTO_ALG_TYPE_HASH,
|
|
|
|
CRYPTO_ALG_TYPE_AHASH_MASK);
|
|
|
|
if (IS_ERR(ghash_alg))
|
2013-01-22 04:29:26 -07:00
|
|
|
return ERR_CAST(ghash_alg);
|
2009-08-05 23:34:26 -06:00
|
|
|
|
|
|
|
err = -ENOMEM;
|
2007-12-07 04:26:11 -07:00
|
|
|
inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
|
|
|
|
if (!inst)
|
2009-08-05 23:34:26 -06:00
|
|
|
goto out_put_ghash;
|
2007-11-26 07:24:11 -07:00
|
|
|
|
2007-12-07 04:26:11 -07:00
|
|
|
ctx = crypto_instance_ctx(inst);
|
2009-08-05 23:34:26 -06:00
|
|
|
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;
|
|
|
|
|
2007-12-07 04:26:11 -07:00
|
|
|
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)
|
2009-08-05 23:34:26 -06:00
|
|
|
goto err_drop_ghash;
|
2007-12-07 04:26:11 -07:00
|
|
|
|
|
|
|
ctr = crypto_skcipher_spawn_alg(&ctx->ctr);
|
2007-11-26 07:24:11 -07:00
|
|
|
|
2007-12-07 05:31:10 -07:00
|
|
|
/* We only support 16-byte blocks. */
|
2007-12-07 04:26:11 -07:00
|
|
|
if (ctr->cra_ablkcipher.ivsize != 16)
|
2007-12-07 05:31:10 -07:00
|
|
|
goto out_put_ctr;
|
|
|
|
|
|
|
|
/* Not a stream cipher? */
|
|
|
|
err = -EINVAL;
|
|
|
|
if (ctr->cra_blocksize != 1)
|
2007-11-26 07:24:11 -07:00
|
|
|
goto out_put_ctr;
|
|
|
|
|
|
|
|
err = -ENAMETOOLONG;
|
2007-12-07 05:31:10 -07:00
|
|
|
if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
|
2009-08-05 23:34:26 -06:00
|
|
|
"gcm_base(%s,%s)", ctr->cra_driver_name,
|
|
|
|
ghash_alg->cra_driver_name) >=
|
2007-12-07 05:31:10 -07:00
|
|
|
CRYPTO_MAX_ALG_NAME)
|
2007-12-07 04:26:11 -07:00
|
|
|
goto out_put_ctr;
|
2007-11-26 07:24:11 -07:00
|
|
|
|
2007-12-07 05:31:10 -07:00
|
|
|
memcpy(inst->alg.cra_name, full_name, CRYPTO_MAX_ALG_NAME);
|
|
|
|
|
2007-12-07 04:26:11 -07:00
|
|
|
inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD;
|
|
|
|
inst->alg.cra_flags |= ctr->cra_flags & CRYPTO_ALG_ASYNC;
|
2007-11-26 07:24:11 -07:00
|
|
|
inst->alg.cra_priority = ctr->cra_priority;
|
2007-12-07 05:31:10 -07:00
|
|
|
inst->alg.cra_blocksize = 1;
|
2007-12-12 04:16:38 -07:00
|
|
|
inst->alg.cra_alignmask = ctr->cra_alignmask | (__alignof__(u64) - 1);
|
2007-11-26 07:24:11 -07:00
|
|
|
inst->alg.cra_type = &crypto_aead_type;
|
2007-12-17 06:42:08 -07:00
|
|
|
inst->alg.cra_aead.ivsize = 16;
|
2007-12-02 00:49:21 -07:00
|
|
|
inst->alg.cra_aead.maxauthsize = 16;
|
2007-11-26 07:24:11 -07:00
|
|
|
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;
|
2007-12-17 00:33:17 -07:00
|
|
|
inst->alg.cra_aead.setauthsize = crypto_gcm_setauthsize;
|
2007-11-26 07:24:11 -07:00
|
|
|
inst->alg.cra_aead.encrypt = crypto_gcm_encrypt;
|
|
|
|
inst->alg.cra_aead.decrypt = crypto_gcm_decrypt;
|
|
|
|
|
|
|
|
out:
|
2009-08-05 23:34:26 -06:00
|
|
|
crypto_mod_put(ghash_alg);
|
2007-11-26 07:24:11 -07:00
|
|
|
return inst;
|
2007-12-07 04:26:11 -07:00
|
|
|
|
|
|
|
out_put_ctr:
|
|
|
|
crypto_drop_skcipher(&ctx->ctr);
|
2009-08-05 23:34:26 -06:00
|
|
|
err_drop_ghash:
|
|
|
|
crypto_drop_ahash(&ctx->ghash);
|
2007-11-26 07:24:11 -07:00
|
|
|
err_free_inst:
|
|
|
|
kfree(inst);
|
2009-08-05 23:34:26 -06:00
|
|
|
out_put_ghash:
|
2007-11-26 07:24:11 -07:00
|
|
|
inst = ERR_PTR(err);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2007-12-07 05:31:10 -07:00
|
|
|
static struct crypto_instance *crypto_gcm_alloc(struct rtattr **tb)
|
|
|
|
{
|
|
|
|
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]);
|
|
|
|
if (IS_ERR(cipher_name))
|
2013-01-22 04:29:26 -07:00
|
|
|
return ERR_CAST(cipher_name);
|
2007-12-07 05:31:10 -07:00
|
|
|
|
|
|
|
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);
|
|
|
|
|
2009-08-05 23:34:26 -06:00
|
|
|
return crypto_gcm_alloc_common(tb, full_name, ctr_name, "ghash");
|
2007-12-07 05:31:10 -07:00
|
|
|
}
|
|
|
|
|
2007-11-26 07:24:11 -07:00
|
|
|
static void crypto_gcm_free(struct crypto_instance *inst)
|
|
|
|
{
|
|
|
|
struct gcm_instance_ctx *ctx = crypto_instance_ctx(inst);
|
|
|
|
|
2007-12-07 04:26:11 -07:00
|
|
|
crypto_drop_skcipher(&ctx->ctr);
|
2009-08-05 23:34:26 -06:00
|
|
|
crypto_drop_ahash(&ctx->ghash);
|
2007-11-26 07:24:11 -07:00
|
|
|
kfree(inst);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct crypto_template crypto_gcm_tmpl = {
|
|
|
|
.name = "gcm",
|
|
|
|
.alloc = crypto_gcm_alloc,
|
|
|
|
.free = crypto_gcm_free,
|
|
|
|
.module = THIS_MODULE,
|
|
|
|
};
|
|
|
|
|
2007-12-07 05:31:10 -07:00
|
|
|
static struct crypto_instance *crypto_gcm_base_alloc(struct rtattr **tb)
|
|
|
|
{
|
|
|
|
const char *ctr_name;
|
2009-08-05 23:34:26 -06:00
|
|
|
const char *ghash_name;
|
2007-12-07 05:31:10 -07:00
|
|
|
char full_name[CRYPTO_MAX_ALG_NAME];
|
|
|
|
|
|
|
|
ctr_name = crypto_attr_alg_name(tb[1]);
|
|
|
|
if (IS_ERR(ctr_name))
|
2013-01-22 04:29:26 -07:00
|
|
|
return ERR_CAST(ctr_name);
|
2007-12-07 05:31:10 -07:00
|
|
|
|
2009-08-05 23:34:26 -06:00
|
|
|
ghash_name = crypto_attr_alg_name(tb[2]);
|
|
|
|
if (IS_ERR(ghash_name))
|
2013-01-22 04:29:26 -07:00
|
|
|
return ERR_CAST(ghash_name);
|
2009-08-05 23:34:26 -06:00
|
|
|
|
|
|
|
if (snprintf(full_name, CRYPTO_MAX_ALG_NAME, "gcm_base(%s,%s)",
|
|
|
|
ctr_name, ghash_name) >= CRYPTO_MAX_ALG_NAME)
|
2007-12-07 05:31:10 -07:00
|
|
|
return ERR_PTR(-ENAMETOOLONG);
|
|
|
|
|
2009-08-05 23:34:26 -06:00
|
|
|
return crypto_gcm_alloc_common(tb, full_name, ctr_name, ghash_name);
|
2007-12-07 05:31:10 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static struct crypto_template crypto_gcm_base_tmpl = {
|
|
|
|
.name = "gcm_base",
|
|
|
|
.alloc = crypto_gcm_base_alloc,
|
|
|
|
.free = crypto_gcm_free,
|
|
|
|
.module = THIS_MODULE,
|
|
|
|
};
|
|
|
|
|
2007-12-17 00:33:17 -07:00
|
|
|
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);
|
|
|
|
if (IS_ERR(algt))
|
2013-01-22 04:29:26 -07:00
|
|
|
return ERR_CAST(algt);
|
2007-12-17 00:33:17 -07:00
|
|
|
|
|
|
|
if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
|
|
|
|
ccm_name = crypto_attr_alg_name(tb[1]);
|
|
|
|
if (IS_ERR(ccm_name))
|
2013-01-22 04:29:26 -07:00
|
|
|
return ERR_CAST(ccm_name);
|
2007-12-17 00:33:17 -07:00
|
|
|
|
|
|
|
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,
|
|
|
|
};
|
|
|
|
|
2010-01-17 03:52:11 -07:00
|
|
|
static inline struct crypto_rfc4543_req_ctx *crypto_rfc4543_reqctx(
|
|
|
|
struct aead_request *req)
|
|
|
|
{
|
|
|
|
unsigned long align = crypto_aead_alignmask(crypto_aead_reqtfm(req));
|
|
|
|
|
|
|
|
return (void *)PTR_ALIGN((u8 *)aead_request_ctx(req), align + 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int crypto_rfc4543_setkey(struct crypto_aead *parent, const u8 *key,
|
|
|
|
unsigned int keylen)
|
|
|
|
{
|
|
|
|
struct crypto_rfc4543_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_rfc4543_setauthsize(struct crypto_aead *parent,
|
|
|
|
unsigned int authsize)
|
|
|
|
{
|
|
|
|
struct crypto_rfc4543_ctx *ctx = crypto_aead_ctx(parent);
|
|
|
|
|
|
|
|
if (authsize != 16)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
return crypto_aead_setauthsize(ctx->child, authsize);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct aead_request *crypto_rfc4543_crypt(struct aead_request *req,
|
|
|
|
int enc)
|
|
|
|
{
|
|
|
|
struct crypto_aead *aead = crypto_aead_reqtfm(req);
|
|
|
|
struct crypto_rfc4543_ctx *ctx = crypto_aead_ctx(aead);
|
|
|
|
struct crypto_rfc4543_req_ctx *rctx = crypto_rfc4543_reqctx(req);
|
|
|
|
struct aead_request *subreq = &rctx->subreq;
|
|
|
|
struct scatterlist *dst = req->dst;
|
|
|
|
struct scatterlist *cipher = rctx->cipher;
|
|
|
|
struct scatterlist *payload = rctx->payload;
|
|
|
|
struct scatterlist *assoc = rctx->assoc;
|
|
|
|
unsigned int authsize = crypto_aead_authsize(aead);
|
|
|
|
unsigned int assoclen = req->assoclen;
|
|
|
|
struct page *dstp;
|
|
|
|
u8 *vdst;
|
|
|
|
u8 *iv = PTR_ALIGN((u8 *)(rctx + 1) + crypto_aead_reqsize(ctx->child),
|
|
|
|
crypto_aead_alignmask(ctx->child) + 1);
|
|
|
|
|
|
|
|
memcpy(iv, ctx->nonce, 4);
|
|
|
|
memcpy(iv + 4, req->iv, 8);
|
|
|
|
|
|
|
|
/* construct cipher/plaintext */
|
|
|
|
if (enc)
|
|
|
|
memset(rctx->auth_tag, 0, authsize);
|
|
|
|
else
|
|
|
|
scatterwalk_map_and_copy(rctx->auth_tag, dst,
|
|
|
|
req->cryptlen - authsize,
|
|
|
|
authsize, 0);
|
|
|
|
|
|
|
|
sg_init_one(cipher, rctx->auth_tag, authsize);
|
|
|
|
|
|
|
|
/* construct the aad */
|
|
|
|
dstp = sg_page(dst);
|
|
|
|
vdst = PageHighMem(dstp) ? NULL : page_address(dstp) + dst->offset;
|
|
|
|
|
|
|
|
sg_init_table(payload, 2);
|
|
|
|
sg_set_buf(payload, req->iv, 8);
|
2010-11-22 03:26:54 -07:00
|
|
|
scatterwalk_crypto_chain(payload, dst, vdst == req->iv + 8, 2);
|
2010-01-17 03:52:11 -07:00
|
|
|
assoclen += 8 + req->cryptlen - (enc ? 0 : authsize);
|
|
|
|
|
|
|
|
sg_init_table(assoc, 2);
|
|
|
|
sg_set_page(assoc, sg_page(req->assoc), req->assoc->length,
|
|
|
|
req->assoc->offset);
|
2010-11-22 03:26:54 -07:00
|
|
|
scatterwalk_crypto_chain(assoc, payload, 0, 2);
|
2010-01-17 03:52:11 -07:00
|
|
|
|
|
|
|
aead_request_set_tfm(subreq, ctx->child);
|
|
|
|
aead_request_set_callback(subreq, req->base.flags, req->base.complete,
|
|
|
|
req->base.data);
|
|
|
|
aead_request_set_crypt(subreq, cipher, cipher, enc ? 0 : authsize, iv);
|
|
|
|
aead_request_set_assoc(subreq, assoc, assoclen);
|
|
|
|
|
|
|
|
return subreq;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int crypto_rfc4543_encrypt(struct aead_request *req)
|
|
|
|
{
|
|
|
|
struct crypto_aead *aead = crypto_aead_reqtfm(req);
|
|
|
|
struct crypto_rfc4543_req_ctx *rctx = crypto_rfc4543_reqctx(req);
|
|
|
|
struct aead_request *subreq;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
subreq = crypto_rfc4543_crypt(req, 1);
|
|
|
|
err = crypto_aead_encrypt(subreq);
|
|
|
|
if (err)
|
|
|
|
return err;
|
|
|
|
|
|
|
|
scatterwalk_map_and_copy(rctx->auth_tag, req->dst, req->cryptlen,
|
|
|
|
crypto_aead_authsize(aead), 1);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int crypto_rfc4543_decrypt(struct aead_request *req)
|
|
|
|
{
|
|
|
|
req = crypto_rfc4543_crypt(req, 0);
|
|
|
|
|
|
|
|
return crypto_aead_decrypt(req);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int crypto_rfc4543_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_rfc4543_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 crypto_rfc4543_req_ctx) +
|
|
|
|
ALIGN(crypto_aead_reqsize(aead),
|
|
|
|
crypto_tfm_ctx_alignment()) +
|
|
|
|
align + 16;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void crypto_rfc4543_exit_tfm(struct crypto_tfm *tfm)
|
|
|
|
{
|
|
|
|
struct crypto_rfc4543_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
|
|
|
|
|
|
crypto_free_aead(ctx->child);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct crypto_instance *crypto_rfc4543_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);
|
|
|
|
if (IS_ERR(algt))
|
2013-01-22 04:29:26 -07:00
|
|
|
return ERR_CAST(algt);
|
2010-01-17 03:52:11 -07:00
|
|
|
|
|
|
|
if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
|
|
|
|
ccm_name = crypto_attr_alg_name(tb[1]);
|
|
|
|
if (IS_ERR(ccm_name))
|
2013-01-22 04:29:26 -07:00
|
|
|
return ERR_CAST(ccm_name);
|
2010-01-17 03:52:11 -07:00
|
|
|
|
|
|
|
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,
|
|
|
|
"rfc4543(%s)", alg->cra_name) >= CRYPTO_MAX_ALG_NAME ||
|
|
|
|
snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
|
|
|
|
"rfc4543(%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_rfc4543_ctx);
|
|
|
|
|
|
|
|
inst->alg.cra_init = crypto_rfc4543_init_tfm;
|
|
|
|
inst->alg.cra_exit = crypto_rfc4543_exit_tfm;
|
|
|
|
|
|
|
|
inst->alg.cra_aead.setkey = crypto_rfc4543_setkey;
|
|
|
|
inst->alg.cra_aead.setauthsize = crypto_rfc4543_setauthsize;
|
|
|
|
inst->alg.cra_aead.encrypt = crypto_rfc4543_encrypt;
|
|
|
|
inst->alg.cra_aead.decrypt = crypto_rfc4543_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_rfc4543_free(struct crypto_instance *inst)
|
|
|
|
{
|
|
|
|
crypto_drop_spawn(crypto_instance_ctx(inst));
|
|
|
|
kfree(inst);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct crypto_template crypto_rfc4543_tmpl = {
|
|
|
|
.name = "rfc4543",
|
|
|
|
.alloc = crypto_rfc4543_alloc,
|
|
|
|
.free = crypto_rfc4543_free,
|
|
|
|
.module = THIS_MODULE,
|
|
|
|
};
|
|
|
|
|
2007-11-26 07:24:11 -07:00
|
|
|
static int __init crypto_gcm_module_init(void)
|
|
|
|
{
|
2007-12-07 05:31:10 -07:00
|
|
|
int err;
|
|
|
|
|
2009-08-05 23:34:26 -06:00
|
|
|
gcm_zeroes = kzalloc(16, GFP_KERNEL);
|
|
|
|
if (!gcm_zeroes)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
2007-12-07 05:31:10 -07:00
|
|
|
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;
|
|
|
|
|
2007-12-17 00:33:17 -07:00
|
|
|
err = crypto_register_template(&crypto_rfc4106_tmpl);
|
|
|
|
if (err)
|
|
|
|
goto out_undo_gcm;
|
|
|
|
|
2010-01-17 03:52:11 -07:00
|
|
|
err = crypto_register_template(&crypto_rfc4543_tmpl);
|
|
|
|
if (err)
|
|
|
|
goto out_undo_rfc4106;
|
|
|
|
|
2009-08-05 23:34:26 -06:00
|
|
|
return 0;
|
2007-12-07 05:31:10 -07:00
|
|
|
|
2010-01-17 03:52:11 -07:00
|
|
|
out_undo_rfc4106:
|
|
|
|
crypto_unregister_template(&crypto_rfc4106_tmpl);
|
2007-12-17 00:33:17 -07:00
|
|
|
out_undo_gcm:
|
|
|
|
crypto_unregister_template(&crypto_gcm_tmpl);
|
2007-12-07 05:31:10 -07:00
|
|
|
out_undo_base:
|
|
|
|
crypto_unregister_template(&crypto_gcm_base_tmpl);
|
2009-08-05 23:34:26 -06:00
|
|
|
out:
|
|
|
|
kfree(gcm_zeroes);
|
|
|
|
return err;
|
2007-11-26 07:24:11 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit crypto_gcm_module_exit(void)
|
|
|
|
{
|
2009-08-05 23:34:26 -06:00
|
|
|
kfree(gcm_zeroes);
|
2010-01-17 03:52:11 -07:00
|
|
|
crypto_unregister_template(&crypto_rfc4543_tmpl);
|
2007-12-17 00:33:17 -07:00
|
|
|
crypto_unregister_template(&crypto_rfc4106_tmpl);
|
2007-11-26 07:24:11 -07:00
|
|
|
crypto_unregister_template(&crypto_gcm_tmpl);
|
2007-12-07 05:31:10 -07:00
|
|
|
crypto_unregister_template(&crypto_gcm_base_tmpl);
|
2007-11-26 07:24:11 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
module_init(crypto_gcm_module_init);
|
|
|
|
module_exit(crypto_gcm_module_exit);
|
|
|
|
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_DESCRIPTION("Galois/Counter Mode");
|
|
|
|
MODULE_AUTHOR("Mikko Herranen <mh1@iki.fi>");
|
2007-12-07 05:31:10 -07:00
|
|
|
MODULE_ALIAS("gcm_base");
|
2007-12-17 00:33:17 -07:00
|
|
|
MODULE_ALIAS("rfc4106");
|
2010-01-17 03:52:11 -07:00
|
|
|
MODULE_ALIAS("rfc4543");
|