aboutsummaryrefslogtreecommitdiffstats
ModeNameSize
-rw-r--r--.gitignore867logstatsplain
-rw-r--r--.mailmap4021logstatsplain
-rw-r--r--COPYING18693logstatsplain
-rw-r--r--CREDITS93610logstatsplain
d---------Documentation7770logstatsplain
-rw-r--r--Kbuild2430logstatsplain
-rw-r--r--MAINTAINERS112386logstatsplain
-rw-r--r--Makefile54845logstatsplain
-rw-r--r--README17080logstatsplain
-rw-r--r--REPORTING-BUGS3172logstatsplain
d---------arch740logstatsplain
d---------block1090logstatsplain
d---------crypto2904logstatsplain
d---------drivers2700logstatsplain
d---------firmware1356logstatsplain
d---------fs4648logstatsplain
d---------include786logstatsplain
d---------init469logstatsplain
d---------ipc474logstatsplain
d---------kernel4842logstatsplain
d---------lib4462logstatsplain
d---------mm2327logstatsplain
d---------net1695logstatsplain
d---------samples252logstatsplain
d---------scripts2759logstatsplain
d---------security471logstatsplain
d---------sound814logstatsplain
d---------usr340logstatsplain
d---------virt / kvm30logstatsplain

Privacy Policy

'#n555'>555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318
/*
 * 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_skcipher *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_skcipher *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 skcipher_request skreq;
	} 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);
}

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

	if (err == -EINPROGRESS)
		return;

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

static int crypto_gcm_setkey(struct crypto_aead *aead, const u8 *key,
			     unsigned int keylen)
{
	struct crypto_gcm_ctx *ctx = crypto_aead_ctx(aead);
	struct crypto_ahash *ghash = ctx->ghash;
	struct crypto_skcipher *ctr = ctx->ctr;
	struct {
		be128 hash;
		u8 iv[16];

		struct crypto_gcm_setkey_result result;

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

	crypto_skcipher_clear_flags(ctr, CRYPTO_TFM_REQ_MASK);
	crypto_skcipher_set_flags(ctr, crypto_aead_get_flags(aead) &
				       CRYPTO_TFM_REQ_MASK);
	err = crypto_skcipher_setkey(ctr, key, keylen);
	crypto_aead_set_flags(aead, crypto_skcipher_get_flags(ctr) &
				    CRYPTO_TFM_RES_MASK);
	if (err)
		return err;

	data = kzalloc(sizeof(*data) + crypto_skcipher_reqsize(ctr),
		       GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	init_completion(&data->result.completion);
	sg_init_one(data->sg, &data->hash, sizeof(data->hash));
	skcipher_request_set_tfm(&data->req, ctr);
	skcipher_request_set_callback(&data->req, CRYPTO_TFM_REQ_MAY_SLEEP |
						  CRYPTO_TFM_REQ_MAY_BACKLOG,
				      crypto_gcm_setkey_done,
				      &data->result);
	skcipher_request_set_crypt(&data->req, data->sg, data->sg,
				   sizeof(data->hash), data->iv);

	err = crypto_skcipher_encrypt(&data->req);
	if (err == -EINPROGRESS || err == -EBUSY) {
		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;
}

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;
}

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);
	}
}

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 skcipher_request *skreq = &pctx->u.skreq;
	struct scatterlist *dst;

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

	skcipher_request_set_tfm(skreq, ctx->ctr);
	skcipher_request_set_crypt(skreq, pctx->src, dst,
				     cryptlen + sizeof(pctx->auth_tag),
				     pctx->iv);
}

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

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);
}

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);
}

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);
}

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);
}

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);
}

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);
}

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);
}

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);
}

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);
}

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);
}

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);
}

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);
}

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);
}

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);
}

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);
}

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);
}

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;
}

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);
}

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);
}

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

	crypto_gcm_init_common(req);
	crypto_gcm_init_crypt(req, req->cryptlen);
	skcipher_request_set_callback(skreq, flags, gcm_encrypt_done, req);

	return crypto_skcipher_encrypt(skreq) ?:
	       gcm_encrypt_continue(req, flags);
}

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;
}

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);
}

static int gcm_dec_hash_continue(struct aead_request *req, u32 flags)
{
	struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
	struct skcipher_request *skreq = &pctx->u.skreq;
	struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;

	crypto_gcm_init_crypt(req, gctx->cryptlen);
	skcipher_request_set_callback(skreq, flags, gcm_decrypt_done, req);
	return crypto_skcipher_decrypt(skreq) ?: crypto_gcm_verify(req);
}

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);
}

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_skcipher *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 skcipher_request) +
		    crypto_skcipher_reqsize(ctr),
		    sizeof(struct ahash_request) +
		    crypto_ahash_reqsize(ghash)));

	return 0;

err_free_hash:
	crypto_free_ahash(ghash);
	return err;
}

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

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

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);
}

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 skcipher_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 |
				    crypto_requires_sync(algt->type,
							 algt->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_spawn_skcipher_alg(&ctx->ctr);

	/* We only support 16-byte blocks. */
	err = -EINVAL;
	if (crypto_skcipher_alg_ivsize(ctr) != 16)
		goto out_put_ctr;

	/* Not a stream cipher? */
	if (ctr->base.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->base.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->base.cra_flags) & CRYPTO_ALG_ASYNC;
	inst->alg.base.cra_priority = (ghash->base.cra_priority +
				       ctr->base.cra_priority) / 2;
	inst->alg.base.cra_blocksize = 1;
	inst->alg.base.cra_alignmask = ghash->base.cra_alignmask |
				       ctr->base.cra_alignmask;
	inst->alg.base.cra_ctxsize = sizeof(struct crypto_gcm_ctx);
	inst->alg.ivsize = 12;
	inst->alg.chunksize = crypto_skcipher_alg_chunksize(ctr);
	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;
}

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");
}

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);
}

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;
}

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 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;
}

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);
}

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);
}

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;
}

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

	crypto_free_aead(ctx->child);
}

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

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.chunksize = crypto_aead_alg_chunksize(alg);
	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;
}

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;
}

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 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);
}

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);
	SKCIPHER_REQUEST_ON_STACK(nreq, ctx->null);

	skcipher_request_set_tfm(nreq, ctx->null);
	skcipher_request_set_callback(nreq, req->base.flags, NULL, NULL);
	skcipher_request_set_crypt(nreq, req->src, req->dst, nbytes, NULL);

	return crypto_skcipher_encrypt(nreq);
}

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

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

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_skcipher *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_skcipher2();
	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;
}

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_skcipher2();
}

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);
}

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.chunksize = crypto_aead_alg_chunksize(alg);
	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;
}

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;
}

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);
}

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");