Release 4.7 crypto/gcm.c

Directory: crypto
/*
 * GCM: Galois/Counter Mode.
 *
 * Copyright (c) 2007 Nokia Siemens Networks - Mikko Herranen <mh1@iki.fi>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 */

#include <crypto/gf128mul.h>
#include <crypto/internal/aead.h>
#include <crypto/internal/skcipher.h>
#include <crypto/internal/hash.h>
#include <crypto/null.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>


struct gcm_instance_ctx {
	
struct crypto_skcipher_spawn ctr;
	
struct crypto_ahash_spawn ghash;
};


struct crypto_gcm_ctx {
	
struct crypto_ablkcipher *ctr;
	
struct crypto_ahash *ghash;
};


struct crypto_rfc4106_ctx {
	
struct crypto_aead *child;
	
u8 nonce[4];
};


struct crypto_rfc4106_req_ctx {
	
struct scatterlist src[3];
	
struct scatterlist dst[3];
	
struct aead_request subreq;
};


struct crypto_rfc4543_instance_ctx {
	
struct crypto_aead_spawn aead;
};


struct crypto_rfc4543_ctx {
	
struct crypto_aead *child;
	
struct crypto_blkcipher *null;
	
u8 nonce[4];
};


struct crypto_rfc4543_req_ctx {
	
struct aead_request subreq;
};


struct crypto_gcm_ghash_ctx {
	
unsigned int cryptlen;
	
struct scatterlist *src;
	
int (*complete)(struct aead_request *req, u32 flags);
};


struct crypto_gcm_req_priv_ctx {
	
u8 iv[16];
	
u8 auth_tag[16];
	
u8 iauth_tag[16];
	
struct scatterlist src[3];
	
struct scatterlist dst[3];
	
struct scatterlist sg;
	
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 struct {
	
u8 buf[16];
	
struct scatterlist sg;
} 
*gcm_zeroes;

static int crypto_rfc4543_copy_src_to_dst(struct aead_request *req, bool enc);



static inline struct crypto_gcm_req_priv_ctx *crypto_gcm_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);
}

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Total 47 100.00% 1 100.00%



static void crypto_gcm_setkey_done(struct crypto_async_request *req, int err)
{
	struct crypto_gcm_setkey_result *result = req->data;

	if (err == -EINPROGRESS)
		return;

	result->err = err;
	complete(&result->completion);
}

Contributors
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huang ying huang ying 28 62.22% 1 50.00%
mikko herranen mikko herranen 17 37.78% 1 50.00%
Total 45 100.00% 2 100.00%



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];

		struct crypto_gcm_setkey_result result;

		struct scatterlist sg[1];
		struct ablkcipher_request req;
	} *data;
	int err;

	crypto_ablkcipher_clear_flags(ctr, CRYPTO_TFM_REQ_MASK);
	crypto_ablkcipher_set_flags(ctr, crypto_aead_get_flags(aead) &
					 CRYPTO_TFM_REQ_MASK);
	err = crypto_ablkcipher_setkey(ctr, key, keylen);
	crypto_aead_set_flags(aead, crypto_ablkcipher_get_flags(ctr) &
				    CRYPTO_TFM_RES_MASK);
	if (err)
		return err;

	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;
	}

	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);

out:
	kzfree(data);
	return err;
}

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mikko herranen mikko herranen 38 10.56% 1 33.33%
herbert xu herbert xu 8 2.22% 1 33.33%
Total 360 100.00% 3 100.00%



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;
	}

	return 0;
}

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huang ying huang ying 51 100.00% 1 100.00%
Total 51 100.00% 1 100.00%



static void crypto_gcm_init_common(struct aead_request *req)
{
	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
	__be32 counter = cpu_to_be32(1);
	struct scatterlist *sg;

	memset(pctx->auth_tag, 0, sizeof(pctx->auth_tag));
	memcpy(pctx->iv, req->iv, 12);
	memcpy(pctx->iv + 12, &counter, 4);

	sg_init_table(pctx->src, 3);
	sg_set_buf(pctx->src, pctx->auth_tag, sizeof(pctx->auth_tag));
	sg = scatterwalk_ffwd(pctx->src + 1, req->src, req->assoclen);
	if (sg != pctx->src + 1)
		sg_chain(pctx->src, 2, sg);

	if (req->src != req->dst) {
		sg_init_table(pctx->dst, 3);
		sg_set_buf(pctx->dst, pctx->auth_tag, sizeof(pctx->auth_tag));
		sg = scatterwalk_ffwd(pctx->dst + 1, req->dst, req->assoclen);
		if (sg != pctx->dst + 1)
			sg_chain(pctx->dst, 2, sg);
	}
}

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huang ying huang ying 156 69.96% 1 25.00%
herbert xu herbert xu 64 28.70% 1 25.00%
dan williams dan williams 2 0.90% 1 25.00%
mikko herranen mikko herranen 1 0.45% 1 25.00%
Total 223 100.00% 4 100.00%



static void crypto_gcm_init_crypt(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 ablkcipher_request *ablk_req = &pctx->u.abreq;
	struct scatterlist *dst;

	dst = req->src == req->dst ? pctx->src : pctx->dst;

	ablkcipher_request_set_tfm(ablk_req, ctx->ctr);
	ablkcipher_request_set_crypt(ablk_req, pctx->src, dst,
				     cryptlen + sizeof(pctx->auth_tag),
				     pctx->iv);
}

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herbert xu herbert xu 105 92.92% 1 33.33%
huang ying huang ying 7 6.19% 1 33.33%
mikko herranen mikko herranen 1 0.88% 1 33.33%
Total 113 100.00% 3 100.00%



static inline unsigned int gcm_remain(unsigned int len)
{
	len &= 0xfU;
	return len ? 16 - len : 0;
}

Contributors
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herbert xu herbert xu 21 84.00% 1 50.00%
huang ying huang ying 4 16.00% 1 50.00%
Total 25 100.00% 2 100.00%

static void gcm_hash_len_done(struct crypto_async_request *areq, int err);



static int gcm_hash_update(struct aead_request *req,
			   crypto_completion_t compl,
			   struct scatterlist *src,
			   unsigned int len, u32 flags)
{
	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
	struct ahash_request *ahreq = &pctx->u.ahreq;

	ahash_request_set_callback(ahreq, flags, compl, req);
	ahash_request_set_crypt(ahreq, src, NULL, len);

	return crypto_ahash_update(ahreq);
}

Contributors
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huang ying huang ying 34 44.74% 1 25.00%
mikko herranen mikko herranen 26 34.21% 1 25.00%
herbert xu herbert xu 14 18.42% 1 25.00%
mark d. rustad mark d. rustad 2 2.63% 1 25.00%
Total 76 100.00% 4 100.00%



static int gcm_hash_remain(struct aead_request *req,
			   unsigned int remain,
			   crypto_completion_t compl, u32 flags)
{
	return gcm_hash_update(req, compl, &gcm_zeroes->sg, remain, flags);
}

Contributors
Person Tokens Prop Commits CommitProp
huang ying huang ying 25 65.79% 1 25.00%
herbert xu herbert xu 9 23.68% 1 25.00%
mikko herranen mikko herranen 2 5.26% 1 25.00%
mark d. rustad mark d. rustad 2 5.26% 1 25.00%
Total 38 100.00% 4 100.00%



static int gcm_hash_len(struct aead_request *req, u32 flags)
{
	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
	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->sg, pctx->iauth_tag, 16);
	ahash_request_set_callback(ahreq, flags, gcm_hash_len_done, req);
	ahash_request_set_crypt(ahreq, &pctx->sg,
				pctx->iauth_tag, sizeof(lengths));

	return crypto_ahash_finup(ahreq);
}

Contributors
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huang ying huang ying 109 79.56% 1 33.33%
herbert xu herbert xu 19 13.87% 1 33.33%
mikko herranen mikko herranen 9 6.57% 1 33.33%
Total 137 100.00% 3 100.00%



static int gcm_hash_len_continue(struct aead_request *req, u32 flags)
{
	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
	struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;

	return gctx->complete(req, flags);
}

Contributors
Person Tokens Prop Commits CommitProp
huang ying huang ying 25 56.82% 2 50.00%
herbert xu herbert xu 15 34.09% 1 25.00%
mikko herranen mikko herranen 4 9.09% 1 25.00%
Total 44 100.00% 4 100.00%



static void gcm_hash_len_done(struct crypto_async_request *areq, int err)
{
	struct aead_request *req = areq->data;

	if (err)
		goto out;

	err = gcm_hash_len_continue(req, 0);
	if (err == -EINPROGRESS)
		return;

out:
	aead_request_complete(req, err);
}

Contributors
Person Tokens Prop Commits CommitProp
huang ying huang ying 24 42.86% 2 50.00%
mikko herranen mikko herranen 23 41.07% 1 25.00%
herbert xu herbert xu 9 16.07% 1 25.00%
Total 56 100.00% 4 100.00%



static int gcm_hash_crypt_remain_continue(struct aead_request *req, u32 flags)
{
	return gcm_hash_len(req, flags) ?:
	       gcm_hash_len_continue(req, flags);
}

Contributors
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herbert xu herbert xu 17 56.67% 1 33.33%
mikko herranen mikko herranen 8 26.67% 1 33.33%
huang ying huang ying 5 16.67% 1 33.33%
Total 30 100.00% 3 100.00%



static void gcm_hash_crypt_remain_done(struct crypto_async_request *areq,
				       int err)
{
	struct aead_request *req = areq->data;

	if (err)
		goto out;

	err = gcm_hash_crypt_remain_continue(req, 0);
	if (err == -EINPROGRESS)
		return;

out:
	aead_request_complete(req, err);
}

Contributors
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huang ying huang ying 28 50.00% 2 40.00%
herbert xu herbert xu 20 35.71% 2 40.00%
mikko herranen mikko herranen 8 14.29% 1 20.00%
Total 56 100.00% 5 100.00%



static int gcm_hash_crypt_continue(struct aead_request *req, u32 flags)
{
	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
	struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
	unsigned int remain;

	remain = gcm_remain(gctx->cryptlen);
	if (remain)
		return gcm_hash_remain(req, remain,
				       gcm_hash_crypt_remain_done, flags) ?:
		       gcm_hash_crypt_remain_continue(req, flags);

	return gcm_hash_crypt_remain_continue(req, flags);
}

Contributors
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huang ying huang ying 36 45.57% 2 50.00%
herbert xu herbert xu 22 27.85% 1 25.00%
mikko herranen mikko herranen 21 26.58% 1 25.00%
Total 79 100.00% 4 100.00%



static void gcm_hash_crypt_done(struct crypto_async_request *areq, int err)
{
	struct aead_request *req = areq->data;

	if (err)
		goto out;

	err = gcm_hash_crypt_continue(req, 0);
	if (err == -EINPROGRESS)
		return;

out:
	aead_request_complete(req, err);
}

Contributors
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herbert xu herbert xu 28 50.00% 2 50.00%
huang ying huang ying 28 50.00% 2 50.00%
Total 56 100.00% 4 100.00%



static int gcm_hash_assoc_remain_continue(struct aead_request *req, u32 flags)
{
	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
	struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;

	if (gctx->cryptlen)
		return gcm_hash_update(req, gcm_hash_crypt_done,
				       gctx->src, gctx->cryptlen, flags) ?:
		       gcm_hash_crypt_continue(req, flags);

	return gcm_hash_crypt_remain_continue(req, flags);
}

Contributors
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huang ying huang ying 43 58.11% 2 50.00%
herbert xu herbert xu 31 41.89% 2 50.00%
Total 74 100.00% 4 100.00%



static void gcm_hash_assoc_remain_done(struct crypto_async_request *areq,
				       int err)
{
	struct aead_request *req = areq->data;

	if (err)
		goto out;

	err = gcm_hash_assoc_remain_continue(req, 0);
	if (err == -EINPROGRESS)
		return;

out:
	aead_request_complete(req, err);
}

Contributors
Person Tokens Prop Commits CommitProp
huang ying huang ying 28 50.00% 2 50.00%
herbert xu herbert xu 27 48.21% 1 25.00%
mikko herranen mikko herranen 1 1.79% 1 25.00%
Total 56 100.00% 4 100.00%



static int gcm_hash_assoc_continue(struct aead_request *req, u32 flags)
{
	unsigned int remain;

	remain = gcm_remain(req->assoclen);
	if (remain)
		return gcm_hash_remain(req, remain,
				       gcm_hash_assoc_remain_done, flags) ?:
		       gcm_hash_assoc_remain_continue(req, flags);

	return gcm_hash_assoc_remain_continue(req, flags);
}

Contributors
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huang ying huang ying 27 45.76% 2 40.00%
herbert xu herbert xu 25 42.37% 2 40.00%
mikko herranen mikko herranen 7 11.86% 1 20.00%
Total 59 100.00% 5 100.00%



static void gcm_hash_assoc_done(struct crypto_async_request *areq, int err)
{
	struct aead_request *req = areq->data;

	if (err)
		goto out;

	err = gcm_hash_assoc_continue(req, 0);
	if (err == -EINPROGRESS)
		return;

out:
	aead_request_complete(req, err);
}

Contributors
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herbert xu herbert xu 35 62.50% 2 50.00%
huang ying huang ying 21 37.50% 2 50.00%
Total 56 100.00% 4 100.00%



static int gcm_hash_init_continue(struct aead_request *req, u32 flags)
{
	if (req->assoclen)
		return gcm_hash_update(req, gcm_hash_assoc_done,
				       req->src, req->assoclen, flags) ?:
		       gcm_hash_assoc_continue(req, flags);

	return gcm_hash_assoc_remain_continue(req, flags);
}

Contributors
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huang ying huang ying 34 62.96% 2 50.00%
herbert xu herbert xu 20 37.04% 2 50.00%
Total 54 100.00% 4 100.00%



static void gcm_hash_init_done(struct crypto_async_request *areq, int err)
{
	struct aead_request *req = areq->data;

	if (err)
		goto out;

	err = gcm_hash_init_continue(req, 0);
	if (err == -EINPROGRESS)
		return;

out:
	aead_request_complete(req, err);
}

Contributors
Person Tokens Prop Commits CommitProp
huang ying huang ying 28 50.00% 2 50.00%
herbert xu herbert xu 28 50.00% 2 50.00%
Total 56 100.00% 4 100.00%



static int gcm_hash(struct aead_request *req, u32 flags)
{
	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
	struct ahash_request *ahreq = &pctx->u.ahreq;
	struct crypto_gcm_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req));

	ahash_request_set_tfm(ahreq, ctx->ghash);

	ahash_request_set_callback(ahreq, flags, gcm_hash_init_done, req);
	return crypto_ahash_init(ahreq) ?:
	       gcm_hash_init_continue(req, flags);
}

Contributors
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herbert xu herbert xu 34 40.96% 2 50.00%
huang ying huang ying 25 30.12% 1 25.00%
mikko herranen mikko herranen 24 28.92% 1 25.00%
Total 83 100.00% 4 100.00%



static int gcm_enc_copy_hash(struct aead_request *req, u32 flags)
{
	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
	struct crypto_aead *aead = crypto_aead_reqtfm(req);
	u8 *auth_tag = pctx->auth_tag;

	crypto_xor(auth_tag, pctx->iauth_tag, 16);
	scatterwalk_map_and_copy(auth_tag, req->dst,
				 req->assoclen + req->cryptlen,
				 crypto_aead_authsize(aead), 1);
	return 0;
}

Contributors
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herbert xu herbert xu 64 80.00% 2 50.00%
huang ying huang ying 9 11.25% 1 25.00%
mikko herranen mikko herranen 7 8.75% 1 25.00%
Total 80 100.00% 4 100.00%



static int gcm_encrypt_continue(struct aead_request *req, u32 flags)
{
	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
	struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;

	gctx->src = sg_next(req->src == req->dst ? pctx->src : pctx->dst);
	gctx->cryptlen = req->cryptlen;
	gctx->complete = gcm_enc_copy_hash;

	return gcm_hash(req, flags);
}

Contributors
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herbert xu herbert xu 63 79.75% 2 50.00%
huang ying huang ying 11 13.92% 1 25.00%
mikko herranen mikko herranen 5 6.33% 1 25.00%
Total 79 100.00% 4 100.00%



static void gcm_encrypt_done(struct crypto_async_request *areq, int err)
{
	struct aead_request *req = areq->data;

	if (err)
		goto out;

	err = gcm_encrypt_continue(req, 0);
	if (err == -EINPROGRESS)
		return;

out:
	aead_request_complete(req, err);
}

Contributors
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herbert xu herbert xu 37 66.07% 1 33.33%
huang ying huang ying 14 25.00% 1 33.33%
mikko herranen mikko herranen 5 8.93% 1 33.33%
Total 56 100.00% 3 100.00%



static int crypto_gcm_encrypt(struct aead_request *req)
{
	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
	struct ablkcipher_request *abreq = &pctx->u.abreq;
	u32 flags = aead_request_flags(req);

	crypto_gcm_init_common(req);
	crypto_gcm_init_crypt(req, req->cryptlen);
	ablkcipher_request_set_callback(abreq, flags, gcm_encrypt_done, req);

	return crypto_ablkcipher_encrypt(abreq) ?:
	       gcm_encrypt_continue(req, flags);
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 53 66.25% 2 50.00%
mikko herranen mikko herranen 23 28.75% 1 25.00%
huang ying huang ying 4 5.00% 1 25.00%
Total 80 100.00% 4 100.00%



static int crypto_gcm_verify(struct aead_request *req)
{
	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
	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,
				 req->assoclen + cryptlen, authsize, 0);
	return crypto_memneq(iauth_tag, auth_tag, authsize) ? -EBADMSG : 0;
}

Contributors
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herbert xu herbert xu 87 79.82% 2 40.00%
huang ying huang ying 20 18.35% 2 40.00%
mikko herranen mikko herranen 2 1.83% 1 20.00%
Total 109 100.00% 5 100.00%



static void gcm_decrypt_done(struct crypto_async_request *areq, int err)
{
	struct aead_request *req = areq->data;

	if (!err)
		err = crypto_gcm_verify(req);

	aead_request_complete(req, err);
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 36 85.71% 3 75.00%
huang ying huang ying 6 14.29% 1 25.00%
Total 42 100.00% 4 100.00%



static int gcm_dec_hash_continue(struct aead_request *req, u32 flags)
{
	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;

	crypto_gcm_init_crypt(req, gctx->cryptlen);
	ablkcipher_request_set_callback(abreq, flags, gcm_decrypt_done, req);
	return crypto_ablkcipher_decrypt(abreq) ?: crypto_gcm_verify(req);
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 61 78.21% 3 60.00%
huang ying huang ying 15 19.23% 1 20.00%
mikko herranen mikko herranen 2 2.56% 1 20.00%
Total 78 100.00% 5 100.00%



static int crypto_gcm_decrypt(struct aead_request *req)
{
	struct crypto_aead *aead = crypto_aead_reqtfm(req);
	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
	struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
	unsigned int authsize = crypto_aead_authsize(aead);
	unsigned int cryptlen = req->cryptlen;
	u32 flags = aead_request_flags(req);

	cryptlen -= authsize;

	crypto_gcm_init_common(req);

	gctx->src = sg_next(pctx->src);
	gctx->cryptlen = cryptlen;
	gctx->complete = gcm_dec_hash_continue;

	return gcm_hash(req, flags);
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 86 81.13% 3 75.00%
mikko herranen mikko herranen 20 18.87% 1 25.00%
Total 106 100.00% 4 100.00%



static int crypto_gcm_init_tfm(struct crypto_aead *tfm)
{
	struct aead_instance *inst = aead_alg_instance(tfm);
	struct gcm_instance_ctx *ictx = aead_instance_ctx(inst);
	struct crypto_gcm_ctx *ctx = crypto_aead_ctx(tfm);
	struct crypto_ablkcipher *ctr;
	struct crypto_ahash *ghash;
	unsigned long align;
	int err;

	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))
		goto err_free_hash;

	ctx->ctr = ctr;
	ctx->ghash = ghash;

	align = crypto_aead_alignmask(tfm);
	align &= ~(crypto_tfm_ctx_alignment() - 1);
	crypto_aead_set_reqsize(tfm,
		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;
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 80 42.11% 5 62.50%
huang ying huang ying 72 37.89% 2 25.00%
mikko herranen mikko herranen 38 20.00% 1 12.50%
Total 190 100.00% 8 100.00%



static void crypto_gcm_exit_tfm(struct crypto_aead *tfm)
{
	struct crypto_gcm_ctx *ctx = crypto_aead_ctx(tfm);

	crypto_free_ahash(ctx->ghash);
	crypto_free_ablkcipher(ctx->ctr);
}

Contributors
Person Tokens Prop Commits CommitProp
mikko herranen mikko herranen 31 88.57% 1 33.33%
huang ying huang ying 2 5.71% 1 33.33%
herbert xu herbert xu 2 5.71% 1 33.33%
Total 35 100.00% 3 100.00%



static void crypto_gcm_free(struct aead_instance *inst)
{
	struct gcm_instance_ctx *ctx = aead_instance_ctx(inst);

	crypto_drop_skcipher(&ctx->ctr);
	crypto_drop_ahash(&ctx->ghash);
	kfree(inst);
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 42 100.00% 1 100.00%
Total 42 100.00% 1 100.00%



static int crypto_gcm_create_common(struct crypto_template *tmpl,
				    struct rtattr **tb,
				    const char *full_name,
				    const char *ctr_name,
				    const char *ghash_name)
{
	struct crypto_attr_type *algt;
	struct aead_instance *inst;
	struct crypto_alg *ctr;
	struct crypto_alg *ghash_alg;
	struct hash_alg_common *ghash;
	struct gcm_instance_ctx *ctx;
	int err;

	algt = crypto_get_attr_type(tb);
	if (IS_ERR(algt))
		return PTR_ERR(algt);

	if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
		return -EINVAL;

	ghash_alg = crypto_find_alg(ghash_name, &crypto_ahash_type,
				    CRYPTO_ALG_TYPE_HASH,
				    CRYPTO_ALG_TYPE_AHASH_MASK);
	if (IS_ERR(ghash_alg))
		return PTR_ERR(ghash_alg);

	ghash = __crypto_hash_alg_common(ghash_alg);

	err = -ENOMEM;
	inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
	if (!inst)
		goto out_put_ghash;

	ctx = aead_instance_ctx(inst);
	err = crypto_init_ahash_spawn(&ctx->ghash, ghash,
				      aead_crypto_instance(inst));
	if (err)
		goto err_free_inst;

	err = -EINVAL;
	if (ghash->digestsize != 16)
		goto err_drop_ghash;

	crypto_set_skcipher_spawn(&ctx->ctr, aead_crypto_instance(inst));
	err = crypto_grab_skcipher(&ctx->ctr, ctr_name, 0,
				   crypto_requires_sync(algt->type,
							algt->mask));
	if (err)
		goto err_drop_ghash;

	ctr = crypto_skcipher_spawn_alg(&ctx->ctr);

	/* We only support 16-byte blocks. */
	if (ctr->cra_ablkcipher.ivsize != 16)
		goto out_put_ctr;

	/* Not a stream cipher? */
	err = -EINVAL;
	if (ctr->cra_blocksize != 1)
		goto out_put_ctr;

	err = -ENAMETOOLONG;
	if (snprintf(inst->alg.base.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;

	memcpy(inst->alg.base.cra_name, full_name, CRYPTO_MAX_ALG_NAME);

	inst->alg.base.cra_flags = (ghash->base.cra_flags | ctr->cra_flags) &
				   CRYPTO_ALG_ASYNC;
	inst->alg.base.cra_priority = (ghash->base.cra_priority +
				       ctr->cra_priority) / 2;
	inst->alg.base.cra_blocksize = 1;
	inst->alg.base.cra_alignmask = ghash->base.cra_alignmask |
				       ctr->cra_alignmask;
	inst->alg.base.cra_ctxsize = sizeof(struct crypto_gcm_ctx);
	inst->alg.ivsize = 12;
	inst->alg.maxauthsize = 16;
	inst->alg.init = crypto_gcm_init_tfm;
	inst->alg.exit = crypto_gcm_exit_tfm;
	inst->alg.setkey = crypto_gcm_setkey;
	inst->alg.setauthsize = crypto_gcm_setauthsize;
	inst->alg.encrypt = crypto_gcm_encrypt;
	inst->alg.decrypt = crypto_gcm_decrypt;

	inst->free = crypto_gcm_free;

	err = aead_register_instance(tmpl, inst);
	if (err)
		goto out_put_ctr;

out_put_ghash:
	crypto_mod_put(ghash_alg);
	return err;

out_put_ctr:
	crypto_drop_skcipher(&ctx->ctr);
err_drop_ghash:
	crypto_drop_ahash(&ctx->ghash);
err_free_inst:
	kfree(inst);
	goto out_put_ghash;
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 276 48.94% 7 70.00%
mikko herranen mikko herranen 199 35.28% 1 10.00%
huang ying huang ying 87 15.43% 1 10.00%
julia lawall julia lawall 2 0.35% 1 10.00%
Total 564 100.00% 10 100.00%



static int crypto_gcm_create(struct crypto_template *tmpl, 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))
		return PTR_ERR(cipher_name);

	if (snprintf(ctr_name, CRYPTO_MAX_ALG_NAME, "ctr(%s)", cipher_name) >=
	    CRYPTO_MAX_ALG_NAME)
		return -ENAMETOOLONG;

	if (snprintf(full_name, CRYPTO_MAX_ALG_NAME, "gcm(%s)", cipher_name) >=
	    CRYPTO_MAX_ALG_NAME)
		return -ENAMETOOLONG;

	return crypto_gcm_create_common(tmpl, tb, full_name,
					ctr_name, "ghash");
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 106 97.25% 2 50.00%
huang ying huang ying 2 1.83% 1 25.00%
julia lawall julia lawall 1 0.92% 1 25.00%
Total 109 100.00% 4 100.00%


static struct crypto_template crypto_gcm_tmpl = {
	.name = "gcm",
	.create = crypto_gcm_create,
	.module = THIS_MODULE,
};



static int crypto_gcm_base_create(struct crypto_template *tmpl,
				  struct rtattr **tb)
{
	const char *ctr_name;
	const char *ghash_name;
	char full_name[CRYPTO_MAX_ALG_NAME];

	ctr_name = crypto_attr_alg_name(tb[1]);
	if (IS_ERR(ctr_name))
		return PTR_ERR(ctr_name);

	ghash_name = crypto_attr_alg_name(tb[2]);
	if (IS_ERR(ghash_name))
		return PTR_ERR(ghash_name);

	if (snprintf(full_name, CRYPTO_MAX_ALG_NAME, "gcm_base(%s,%s)",
		     ctr_name, ghash_name) >= CRYPTO_MAX_ALG_NAME)
		return -ENAMETOOLONG;

	return crypto_gcm_create_common(tmpl, tb, full_name,
					ctr_name, ghash_name);
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 81 71.05% 2 50.00%
huang ying huang ying 31 27.19% 1 25.00%
julia lawall julia lawall 2 1.75% 1 25.00%
Total 114 100.00% 4 100.00%


static struct crypto_template crypto_gcm_base_tmpl = {
	.name = "gcm_base",
	.create = crypto_gcm_base_create,
	.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;
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 106 92.98% 2 66.67%
mikko herranen mikko herranen 8 7.02% 1 33.33%
Total 114 100.00% 3 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 49 87.50% 2 66.67%
mikko herranen mikko herranen 7 12.50% 1 33.33%
Total 56 100.00% 3 100.00%



static struct aead_request *crypto_rfc4106_crypt(struct aead_request *req)
{
	struct crypto_rfc4106_req_ctx *rctx = aead_request_ctx(req);
	struct crypto_aead *aead = crypto_aead_reqtfm(req);
	struct crypto_rfc4106_ctx *ctx = crypto_aead_ctx(aead);
	struct aead_request *subreq = &rctx->subreq;
	struct crypto_aead *child = ctx->child;
	struct scatterlist *sg;
	u8 *iv = PTR_ALIGN((u8 *)(subreq + 1) + crypto_aead_reqsize(child),
			   crypto_aead_alignmask(child) + 1);

	scatterwalk_map_and_copy(iv + 12, req->src, 0, req->assoclen - 8, 0);

	memcpy(iv, ctx->nonce, 4);
	memcpy(iv + 4, req->iv, 8);

	sg_init_table(rctx->src, 3);
	sg_set_buf(rctx->src, iv + 12, req->assoclen - 8);
	sg = scatterwalk_ffwd(rctx->src + 1, req->src, req->assoclen);
	if (sg != rctx->src + 1)
		sg_chain(rctx->src, 2, sg);

	if (req->src != req->dst) {
		sg_init_table(rctx->dst, 3);
		sg_set_buf(rctx->dst, iv + 12, req->assoclen - 8);
		sg = scatterwalk_ffwd(rctx->dst + 1, req->dst, req->assoclen);
		if (sg != rctx->dst + 1)
			sg_chain(rctx->dst, 2, sg);
	}

	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, rctx->src,
			       req->src == req->dst ? rctx->src : rctx->dst,
			       req->cryptlen, iv);
	aead_request_set_ad(subreq, req->assoclen - 8);

	return subreq;
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 356 98.89% 2 66.67%
mikko herranen mikko herranen 4 1.11% 1 33.33%
Total 360 100.00% 3 100.00%



static int crypto_rfc4106_encrypt(struct aead_request *req)
{
	if (req->assoclen != 16 && req->assoclen != 20)
		return -EINVAL;

	req = crypto_rfc4106_crypt(req);

	return crypto_aead_encrypt(req);
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 42 100.00% 2 100.00%
Total 42 100.00% 2 100.00%



static int crypto_rfc4106_decrypt(struct aead_request *req)
{
	if (req->assoclen != 16 && req->assoclen != 20)
		return -EINVAL;

	req = crypto_rfc4106_crypt(req);

	return crypto_aead_decrypt(req);
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 42 100.00% 2 100.00%
Total 42 100.00% 2 100.00%



static int crypto_rfc4106_init_tfm(struct crypto_aead *tfm)
{
	struct aead_instance *inst = aead_alg_instance(tfm);
	struct crypto_aead_spawn *spawn = aead_instance_ctx(inst);
	struct crypto_rfc4106_ctx *ctx = crypto_aead_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);
	crypto_aead_set_reqsize(
		tfm,
		sizeof(struct crypto_rfc4106_req_ctx) +
		ALIGN(crypto_aead_reqsize(aead), crypto_tfm_ctx_alignment()) +
		align + 24);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 122 100.00% 4 100.00%
Total 122 100.00% 4 100.00%



static void crypto_rfc4106_exit_tfm(struct crypto_aead *tfm)
{
	struct crypto_rfc4106_ctx *ctx = crypto_aead_ctx(tfm);

	crypto_free_aead(ctx->child);
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 28 100.00% 2 100.00%
Total 28 100.00% 2 100.00%



static void crypto_rfc4106_free(struct aead_instance *inst)
{
	crypto_drop_aead(aead_instance_ctx(inst));
	kfree(inst);
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 24 100.00% 1 100.00%
Total 24 100.00% 1 100.00%



static int crypto_rfc4106_create(struct crypto_template *tmpl,
				 struct rtattr **tb)
{
	struct crypto_attr_type *algt;
	struct aead_instance *inst;
	struct crypto_aead_spawn *spawn;
	struct aead_alg *alg;
	const char *ccm_name;
	int err;

	algt = crypto_get_attr_type(tb);
	if (IS_ERR(algt))
		return PTR_ERR(algt);

	if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
		return -EINVAL;

	ccm_name = crypto_attr_alg_name(tb[1]);
	if (IS_ERR(ccm_name))
		return PTR_ERR(ccm_name);

	inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
	if (!inst)
		return -ENOMEM;

	spawn = aead_instance_ctx(inst);
	crypto_set_aead_spawn(spawn, aead_crypto_instance(inst));
	err = crypto_grab_aead(spawn, ccm_name, 0,
			       crypto_requires_sync(algt->type, algt->mask));
	if (err)
		goto out_free_inst;

	alg = crypto_spawn_aead_alg(spawn);

	err = -EINVAL;

	/* Underlying IV size must be 12. */
	if (crypto_aead_alg_ivsize(alg) != 12)
		goto out_drop_alg;

	/* Not a stream cipher? */
	if (alg->base.cra_blocksize != 1)
		goto out_drop_alg;

	err = -ENAMETOOLONG;
	if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME,
		     "rfc4106(%s)", alg->base.cra_name) >=
	    CRYPTO_MAX_ALG_NAME ||
	    snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
		     "rfc4106(%s)", alg->base.cra_driver_name) >=
	    CRYPTO_MAX_ALG_NAME)
		goto out_drop_alg;

	inst->alg.base.cra_flags = alg->base.cra_flags & CRYPTO_ALG_ASYNC;
	inst->alg.base.cra_priority = alg->base.cra_priority;
	inst->alg.base.cra_blocksize = 1;
	inst->alg.base.cra_alignmask = alg->base.cra_alignmask;

	inst->alg.base.cra_ctxsize = sizeof(struct crypto_rfc4106_ctx);

	inst->alg.ivsize = 8;
	inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);

	inst->alg.init = crypto_rfc4106_init_tfm;
	inst->alg.exit = crypto_rfc4106_exit_tfm;

	inst->alg.setkey = crypto_rfc4106_setkey;
	inst->alg.setauthsize = crypto_rfc4106_setauthsize;
	inst->alg.encrypt = crypto_rfc4106_encrypt;
	inst->alg.decrypt = crypto_rfc4106_decrypt;

	inst->free = crypto_rfc4106_free;

	err = aead_register_instance(tmpl, inst);
	if (err)
		goto out_drop_alg;

out:
	return err;

out_drop_alg:
	crypto_drop_aead(spawn);
out_free_inst:
	kfree(inst);
	goto out;
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 452 99.56% 3 75.00%
julia lawall julia lawall 2 0.44% 1 25.00%
Total 454 100.00% 4 100.00%


static struct crypto_template crypto_rfc4106_tmpl = {
	.name = "rfc4106",
	.create = crypto_rfc4106_create,
	.module = THIS_MODULE,
};



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;
}

Contributors
Person Tokens Prop Commits CommitProp
tobias brunner tobias brunner 86 75.44% 1 33.33%
herbert xu herbert xu 16 14.04% 1 33.33%
huang ying huang ying 12 10.53% 1 33.33%
Total 114 100.00% 3 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 23 51.11% 2 50.00%
tobias brunner tobias brunner 16 35.56% 1 25.00%
jussi kivilinna jussi kivilinna 6 13.33% 1 25.00%
Total 45 100.00% 4 100.00%



static int crypto_rfc4543_crypt(struct aead_request *req, bool enc)
{
	struct crypto_aead *aead = crypto_aead_reqtfm(req);
	struct crypto_rfc4543_ctx *ctx = crypto_aead_ctx(aead);
	struct crypto_rfc4543_req_ctx *rctx = aead_request_ctx(req);
	struct aead_request *subreq = &rctx->subreq;
	unsigned int authsize = crypto_aead_authsize(aead);
	u8 *iv = PTR_ALIGN((u8 *)(rctx + 1) + crypto_aead_reqsize(ctx->child),
			   crypto_aead_alignmask(ctx->child) + 1);
	int err;

	if (req->src != req->dst) {
		err = crypto_rfc4543_copy_src_to_dst(req, enc);
		if (err)
			return err;
	}

	memcpy(iv, ctx->nonce, 4);
	memcpy(iv + 4, req->iv, 8);

	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, req->src, req->dst,
			       enc ? 0 : authsize, iv);
	aead_request_set_ad(subreq, req->assoclen + req->cryptlen -
				    subreq->cryptlen);

	return enc ? crypto_aead_encrypt(subreq) : crypto_aead_decrypt(subreq);
}

Contributors
Person Tokens Prop Commits CommitProp
tobias brunner tobias brunner 120 51.28% 1 20.00%
herbert xu herbert xu 94 40.17% 1 20.00%
jussi kivilinna jussi kivilinna 19 8.12% 2 40.00%
steffen klassert steffen klassert 1 0.43% 1 20.00%
Total 234 100.00% 5 100.00%



static int crypto_rfc4543_copy_src_to_dst(struct aead_request *req, bool enc)
{
	struct crypto_aead *aead = crypto_aead_reqtfm(req);
	struct crypto_rfc4543_ctx *ctx = crypto_aead_ctx(aead);
	unsigned int authsize = crypto_aead_authsize(aead);
	unsigned int nbytes = req->assoclen + req->cryptlen -
			      (enc ? 0 : authsize);
	struct blkcipher_desc desc = {
		.tfm = ctx->null,
        };

	return crypto_blkcipher_encrypt(&desc, req->dst, req->src, nbytes);
}

Contributors
Person Tokens Prop Commits CommitProp
jussi kivilinna jussi kivilinna 48 51.61% 1 33.33%
herbert xu herbert xu 30 32.26% 1 33.33%
tobias brunner tobias brunner 15 16.13% 1 33.33%
Total 93 100.00% 3 100.00%



static int crypto_rfc4543_encrypt(struct aead_request *req)
{
	return crypto_rfc4543_crypt(req, true);
}

Contributors
Person Tokens Prop Commits CommitProp
tobias brunner tobias brunner 9 47.37% 1 33.33%
jussi kivilinna jussi kivilinna 6 31.58% 1 33.33%
herbert xu herbert xu 4 21.05% 1 33.33%
Total 19 100.00% 3 100.00%



static int crypto_rfc4543_decrypt(struct aead_request *req)
{
	return crypto_rfc4543_crypt(req, false);
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 10 52.63% 1 33.33%
tobias brunner tobias brunner 8 42.11% 1 33.33%
jussi kivilinna jussi kivilinna 1 5.26% 1 33.33%
Total 19 100.00% 3 100.00%



static int crypto_rfc4543_init_tfm(struct crypto_aead *tfm)
{
	struct aead_instance *inst = aead_alg_instance(tfm);
	struct crypto_rfc4543_instance_ctx *ictx = aead_instance_ctx(inst);
	struct crypto_aead_spawn *spawn = &ictx->aead;
	struct crypto_rfc4543_ctx *ctx = crypto_aead_ctx(tfm);
	struct crypto_aead *aead;
	struct crypto_blkcipher *null;
	unsigned long align;
	int err = 0;

	aead = crypto_spawn_aead(spawn);
	if (IS_ERR(aead))
		return PTR_ERR(aead);

	null = crypto_get_default_null_skcipher();
	err = PTR_ERR(null);
	if (IS_ERR(null))
		goto err_free_aead;

	ctx->child = aead;
	ctx->null = null;

	align = crypto_aead_alignmask(aead);
	align &= ~(crypto_tfm_ctx_alignment() - 1);
	crypto_aead_set_reqsize(
		tfm,
		sizeof(struct crypto_rfc4543_req_ctx) +
		ALIGN(crypto_aead_reqsize(aead), crypto_tfm_ctx_alignment()) +
		align + 12);

	return 0;

err_free_aead:
	crypto_free_aead(aead);
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
tobias brunner tobias brunner 108 60.00% 1 20.00%
jussi kivilinna jussi kivilinna 58 32.22% 1 20.00%
herbert xu herbert xu 14 7.78% 3 60.00%
Total 180 100.00% 5 100.00%



static void crypto_rfc4543_exit_tfm(struct crypto_aead *tfm)
{
	struct crypto_rfc4543_ctx *ctx = crypto_aead_ctx(tfm);

	crypto_free_aead(ctx->child);
	crypto_put_default_null_skcipher();
}

Contributors
Person Tokens Prop Commits CommitProp
tobias brunner tobias brunner 26 83.87% 1 25.00%
herbert xu herbert xu 4 12.90% 2 50.00%
jussi kivilinna jussi kivilinna 1 3.23% 1 25.00%
Total 31 100.00% 4 100.00%



static void crypto_rfc4543_free(struct aead_instance *inst)
{
	struct crypto_rfc4543_instance_ctx *ctx = aead_instance_ctx(inst);

	crypto_drop_aead(&ctx->aead);

	kfree(inst);
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 34 100.00% 1 100.00%
Total 34 100.00% 1 100.00%



static int crypto_rfc4543_create(struct crypto_template *tmpl,
				struct rtattr **tb)
{
	struct crypto_attr_type *algt;
	struct aead_instance *inst;
	struct crypto_aead_spawn *spawn;
	struct aead_alg *alg;
	struct crypto_rfc4543_instance_ctx *ctx;
	const char *ccm_name;
	int err;

	algt = crypto_get_attr_type(tb);
	if (IS_ERR(algt))
		return PTR_ERR(algt);

	if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
		return -EINVAL;

	ccm_name = crypto_attr_alg_name(tb[1]);
	if (IS_ERR(ccm_name))
		return PTR_ERR(ccm_name);

	inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
	if (!inst)
		return -ENOMEM;

	ctx = aead_instance_ctx(inst);
	spawn = &ctx->aead;
	crypto_set_aead_spawn(spawn, aead_crypto_instance(inst));
	err = crypto_grab_aead(spawn, ccm_name, 0,
			       crypto_requires_sync(algt->type, algt->mask));
	if (err)
		goto out_free_inst;

	alg = crypto_spawn_aead_alg(spawn);

	err = -EINVAL;

	/* Underlying IV size must be 12. */
	if (crypto_aead_alg_ivsize(alg) != 12)
		goto out_drop_alg;

	/* Not a stream cipher? */
	if (alg->base.cra_blocksize != 1)
		goto out_drop_alg;

	err = -ENAMETOOLONG;
	if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME,
		     "rfc4543(%s)", alg->base.cra_name) >=
	    CRYPTO_MAX_ALG_NAME ||
	    snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
		     "rfc4543(%s)", alg->base.cra_driver_name) >=
	    CRYPTO_MAX_ALG_NAME)
		goto out_drop_alg;

	inst->alg.base.cra_flags = alg->base.cra_flags & CRYPTO_ALG_ASYNC;
	inst->alg.base.cra_priority = alg->base.cra_priority;
	inst->alg.base.cra_blocksize = 1;
	inst->alg.base.cra_alignmask = alg->base.cra_alignmask;

	inst->alg.base.cra_ctxsize = sizeof(struct crypto_rfc4543_ctx);

	inst->alg.ivsize = 8;
	inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);

	inst->alg.init = crypto_rfc4543_init_tfm;
	inst->alg.exit = crypto_rfc4543_exit_tfm;

	inst->alg.setkey = crypto_rfc4543_setkey;
	inst->alg.setauthsize = crypto_rfc4543_setauthsize;
	inst->alg.encrypt = crypto_rfc4543_encrypt;
	inst->alg.decrypt = crypto_rfc4543_decrypt;

	inst->free = crypto_rfc4543_free,

	err = aead_register_instance(tmpl, inst);
	if (err)
		goto out_drop_alg;

out:
	return err;

out_drop_alg:
	crypto_drop_aead(spawn);
out_free_inst:
	kfree(inst);
	goto out;
}

Contributors
Person Tokens Prop Commits CommitProp
tobias brunner tobias brunner 370 79.40% 1 16.67%
herbert xu herbert xu 80 17.17% 3 50.00%
jussi kivilinna jussi kivilinna 14 3.00% 1 16.67%
julia lawall julia lawall 2 0.43% 1 16.67%
Total 466 100.00% 6 100.00%


static struct crypto_template crypto_rfc4543_tmpl = {
	.name = "rfc4543",
	.create = crypto_rfc4543_create,
	.module = THIS_MODULE,
};



static int __init crypto_gcm_module_init(void)
{
	int err;

	gcm_zeroes = kzalloc(sizeof(*gcm_zeroes), GFP_KERNEL);
	if (!gcm_zeroes)
		return -ENOMEM;

	sg_init_one(&gcm_zeroes->sg, gcm_zeroes->buf, sizeof(gcm_zeroes->buf));

	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;

	err = crypto_register_template(&crypto_rfc4543_tmpl);
	if (err)
		goto out_undo_rfc4106;

	return 0;

out_undo_rfc4106:
	crypto_unregister_template(&crypto_rfc4106_tmpl);
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;
}

Contributors
Person Tokens Prop Commits CommitProp
tobias brunner tobias brunner 126 84.00% 1 50.00%
herbert xu herbert xu 24 16.00% 1 50.00%
Total 150 100.00% 2 100.00%



static void __exit crypto_gcm_module_exit(void)
{
	kfree(gcm_zeroes);
	crypto_unregister_template(&crypto_rfc4543_tmpl);
	crypto_unregister_template(&crypto_rfc4106_tmpl);
	crypto_unregister_template(&crypto_gcm_tmpl);
	crypto_unregister_template(&crypto_gcm_base_tmpl);
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 19 50.00% 1 33.33%
tobias brunner tobias brunner 15 39.47% 1 33.33%
huang ying huang ying 4 10.53% 1 33.33%
Total 38 100.00% 3 100.00%


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>");
MODULE_ALIAS_CRYPTO("gcm_base");
MODULE_ALIAS_CRYPTO("rfc4106");
MODULE_ALIAS_CRYPTO("rfc4543");
MODULE_ALIAS_CRYPTO("gcm");
Overall Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 3439 51.74% 13 50.00%
huang ying huang ying 1426 21.45% 2 7.69%
tobias brunner tobias brunner 948 14.26% 1 3.85%
mikko herranen mikko herranen 643 9.67% 1 3.85%
jussi kivilinna jussi kivilinna 167 2.51% 3 11.54%
julia lawall julia lawall 9 0.14% 1 3.85%
kees cook kees cook 8 0.12% 2 7.69%
mark d. rustad mark d. rustad 4 0.06% 1 3.85%
dan williams dan williams 2 0.03% 1 3.85%
steffen klassert steffen klassert 1 0.02% 1 3.85%
Total 6647 100.00% 26 100.00%
  Directory: crypto

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
herbert xu	herbert xu	47	100.00%	1	100.00%
	Total	47	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.7 crypto/gcm.c

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