Thomas Gleixner | 2874c5f | 2019-05-27 08:55:01 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 2 | /* |
| 3 | * AEAD: Authenticated Encryption with Associated Data |
Richard Hartmann | 3922538 | 2010-02-16 20:24:07 +0800 | [diff] [blame] | 4 | * |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 5 | * This file provides API support for AEAD algorithms. |
| 6 | * |
Herbert Xu | b0d955b | 2015-08-14 15:30:41 +0800 | [diff] [blame] | 7 | * Copyright (c) 2007-2015 Herbert Xu <herbert@gondor.apana.org.au> |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 8 | */ |
| 9 | |
Herbert Xu | 6350449 | 2015-05-27 14:37:30 +0800 | [diff] [blame] | 10 | #include <crypto/internal/geniv.h> |
Herbert Xu | 149a397 | 2015-08-13 17:28:58 +0800 | [diff] [blame] | 11 | #include <crypto/internal/rng.h> |
| 12 | #include <crypto/null.h> |
Herbert Xu | 996d98d | 2015-05-21 15:11:01 +0800 | [diff] [blame] | 13 | #include <crypto/scatterwalk.h> |
Herbert Xu | 5b6d2d7 | 2007-12-12 19:23:36 +0800 | [diff] [blame] | 14 | #include <linux/err.h> |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 15 | #include <linux/init.h> |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/module.h> |
Herbert Xu | d29ce98 | 2007-12-12 19:24:27 +0800 | [diff] [blame] | 18 | #include <linux/rtnetlink.h> |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 19 | #include <linux/slab.h> |
| 20 | #include <linux/seq_file.h> |
Steffen Klassert | 6ad414f | 2011-09-27 07:44:27 +0200 | [diff] [blame] | 21 | #include <linux/cryptouser.h> |
Gideon Israel Dsouza | d8c34b9 | 2016-12-31 21:26:23 +0530 | [diff] [blame] | 22 | #include <linux/compiler.h> |
Steffen Klassert | 6ad414f | 2011-09-27 07:44:27 +0200 | [diff] [blame] | 23 | #include <net/netlink.h> |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 24 | |
Herbert Xu | 5b6d2d7 | 2007-12-12 19:23:36 +0800 | [diff] [blame] | 25 | #include "internal.h" |
| 26 | |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 27 | static int setkey_unaligned(struct crypto_aead *tfm, const u8 *key, |
| 28 | unsigned int keylen) |
| 29 | { |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 30 | unsigned long alignmask = crypto_aead_alignmask(tfm); |
| 31 | int ret; |
| 32 | u8 *buffer, *alignbuffer; |
| 33 | unsigned long absize; |
| 34 | |
| 35 | absize = keylen + alignmask; |
| 36 | buffer = kmalloc(absize, GFP_ATOMIC); |
| 37 | if (!buffer) |
| 38 | return -ENOMEM; |
| 39 | |
| 40 | alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1); |
| 41 | memcpy(alignbuffer, key, keylen); |
Herbert Xu | b0d955b | 2015-08-14 15:30:41 +0800 | [diff] [blame] | 42 | ret = crypto_aead_alg(tfm)->setkey(tfm, alignbuffer, keylen); |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 43 | memset(alignbuffer, 0, keylen); |
| 44 | kfree(buffer); |
| 45 | return ret; |
| 46 | } |
| 47 | |
Herbert Xu | 5d1d65f | 2015-05-11 17:48:12 +0800 | [diff] [blame] | 48 | int crypto_aead_setkey(struct crypto_aead *tfm, |
| 49 | const u8 *key, unsigned int keylen) |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 50 | { |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 51 | unsigned long alignmask = crypto_aead_alignmask(tfm); |
Eric Biggers | dc26c17 | 2018-01-03 11:16:30 -0800 | [diff] [blame] | 52 | int err; |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 53 | |
| 54 | if ((unsigned long)key & alignmask) |
Eric Biggers | dc26c17 | 2018-01-03 11:16:30 -0800 | [diff] [blame] | 55 | err = setkey_unaligned(tfm, key, keylen); |
| 56 | else |
| 57 | err = crypto_aead_alg(tfm)->setkey(tfm, key, keylen); |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 58 | |
Eric Biggers | 6ebc970 | 2019-01-06 18:47:44 -0800 | [diff] [blame] | 59 | if (unlikely(err)) { |
| 60 | crypto_aead_set_flags(tfm, CRYPTO_TFM_NEED_KEY); |
Eric Biggers | dc26c17 | 2018-01-03 11:16:30 -0800 | [diff] [blame] | 61 | return err; |
Eric Biggers | 6ebc970 | 2019-01-06 18:47:44 -0800 | [diff] [blame] | 62 | } |
Eric Biggers | dc26c17 | 2018-01-03 11:16:30 -0800 | [diff] [blame] | 63 | |
| 64 | crypto_aead_clear_flags(tfm, CRYPTO_TFM_NEED_KEY); |
| 65 | return 0; |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 66 | } |
Herbert Xu | 5d1d65f | 2015-05-11 17:48:12 +0800 | [diff] [blame] | 67 | EXPORT_SYMBOL_GPL(crypto_aead_setkey); |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 68 | |
Herbert Xu | 7ba683a | 2007-12-02 18:49:21 +1100 | [diff] [blame] | 69 | int crypto_aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize) |
| 70 | { |
| 71 | int err; |
| 72 | |
Herbert Xu | 30e4c01 | 2015-05-22 16:30:48 +0800 | [diff] [blame] | 73 | if (authsize > crypto_aead_maxauthsize(tfm)) |
Herbert Xu | 7ba683a | 2007-12-02 18:49:21 +1100 | [diff] [blame] | 74 | return -EINVAL; |
| 75 | |
Herbert Xu | b0d955b | 2015-08-14 15:30:41 +0800 | [diff] [blame] | 76 | if (crypto_aead_alg(tfm)->setauthsize) { |
| 77 | err = crypto_aead_alg(tfm)->setauthsize(tfm, authsize); |
Herbert Xu | 7ba683a | 2007-12-02 18:49:21 +1100 | [diff] [blame] | 78 | if (err) |
| 79 | return err; |
| 80 | } |
| 81 | |
Herbert Xu | 5d1d65f | 2015-05-11 17:48:12 +0800 | [diff] [blame] | 82 | tfm->authsize = authsize; |
Herbert Xu | 7ba683a | 2007-12-02 18:49:21 +1100 | [diff] [blame] | 83 | return 0; |
| 84 | } |
| 85 | EXPORT_SYMBOL_GPL(crypto_aead_setauthsize); |
| 86 | |
Herbert Xu | 5eb8ec6 | 2015-05-28 22:07:53 +0800 | [diff] [blame] | 87 | static void crypto_aead_exit_tfm(struct crypto_tfm *tfm) |
| 88 | { |
| 89 | struct crypto_aead *aead = __crypto_aead_cast(tfm); |
| 90 | struct aead_alg *alg = crypto_aead_alg(aead); |
| 91 | |
| 92 | alg->exit(aead); |
| 93 | } |
| 94 | |
Herbert Xu | 63293c6 | 2015-05-21 15:11:08 +0800 | [diff] [blame] | 95 | static int crypto_aead_init_tfm(struct crypto_tfm *tfm) |
| 96 | { |
| 97 | struct crypto_aead *aead = __crypto_aead_cast(tfm); |
| 98 | struct aead_alg *alg = crypto_aead_alg(aead); |
| 99 | |
Eric Biggers | dc26c17 | 2018-01-03 11:16:30 -0800 | [diff] [blame] | 100 | crypto_aead_set_flags(aead, CRYPTO_TFM_NEED_KEY); |
| 101 | |
Herbert Xu | 63293c6 | 2015-05-21 15:11:08 +0800 | [diff] [blame] | 102 | aead->authsize = alg->maxauthsize; |
| 103 | |
Herbert Xu | 5eb8ec6 | 2015-05-28 22:07:53 +0800 | [diff] [blame] | 104 | if (alg->exit) |
| 105 | aead->base.exit = crypto_aead_exit_tfm; |
| 106 | |
| 107 | if (alg->init) |
| 108 | return alg->init(aead); |
| 109 | |
Herbert Xu | 63293c6 | 2015-05-21 15:11:08 +0800 | [diff] [blame] | 110 | return 0; |
| 111 | } |
| 112 | |
Herbert Xu | 3acc847 | 2011-11-03 23:46:07 +1100 | [diff] [blame] | 113 | #ifdef CONFIG_NET |
Herbert Xu | 63293c6 | 2015-05-21 15:11:08 +0800 | [diff] [blame] | 114 | static int crypto_aead_report(struct sk_buff *skb, struct crypto_alg *alg) |
| 115 | { |
| 116 | struct crypto_report_aead raead; |
| 117 | struct aead_alg *aead = container_of(alg, struct aead_alg, base); |
| 118 | |
Eric Biggers | 37db69e | 2018-11-03 14:56:03 -0700 | [diff] [blame] | 119 | memset(&raead, 0, sizeof(raead)); |
| 120 | |
| 121 | strscpy(raead.type, "aead", sizeof(raead.type)); |
| 122 | strscpy(raead.geniv, "<none>", sizeof(raead.geniv)); |
Herbert Xu | 63293c6 | 2015-05-21 15:11:08 +0800 | [diff] [blame] | 123 | |
| 124 | raead.blocksize = alg->cra_blocksize; |
| 125 | raead.maxauthsize = aead->maxauthsize; |
| 126 | raead.ivsize = aead->ivsize; |
| 127 | |
Eric Biggers | 37db69e | 2018-11-03 14:56:03 -0700 | [diff] [blame] | 128 | return nla_put(skb, CRYPTOCFGA_REPORT_AEAD, sizeof(raead), &raead); |
Herbert Xu | 63293c6 | 2015-05-21 15:11:08 +0800 | [diff] [blame] | 129 | } |
| 130 | #else |
Herbert Xu | 3acc847 | 2011-11-03 23:46:07 +1100 | [diff] [blame] | 131 | static int crypto_aead_report(struct sk_buff *skb, struct crypto_alg *alg) |
| 132 | { |
| 133 | return -ENOSYS; |
| 134 | } |
| 135 | #endif |
Steffen Klassert | 6ad414f | 2011-09-27 07:44:27 +0200 | [diff] [blame] | 136 | |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 137 | static void crypto_aead_show(struct seq_file *m, struct crypto_alg *alg) |
Gideon Israel Dsouza | d8c34b9 | 2016-12-31 21:26:23 +0530 | [diff] [blame] | 138 | __maybe_unused; |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 139 | static void crypto_aead_show(struct seq_file *m, struct crypto_alg *alg) |
| 140 | { |
Herbert Xu | 63293c6 | 2015-05-21 15:11:08 +0800 | [diff] [blame] | 141 | struct aead_alg *aead = container_of(alg, struct aead_alg, base); |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 142 | |
| 143 | seq_printf(m, "type : aead\n"); |
Herbert Xu | 189ed66 | 2007-12-14 22:29:37 +0800 | [diff] [blame] | 144 | seq_printf(m, "async : %s\n", alg->cra_flags & CRYPTO_ALG_ASYNC ? |
| 145 | "yes" : "no"); |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 146 | seq_printf(m, "blocksize : %u\n", alg->cra_blocksize); |
| 147 | seq_printf(m, "ivsize : %u\n", aead->ivsize); |
Herbert Xu | 7ba683a | 2007-12-02 18:49:21 +1100 | [diff] [blame] | 148 | seq_printf(m, "maxauthsize : %u\n", aead->maxauthsize); |
Herbert Xu | 63293c6 | 2015-05-21 15:11:08 +0800 | [diff] [blame] | 149 | seq_printf(m, "geniv : <none>\n"); |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 150 | } |
| 151 | |
Herbert Xu | ba75e15 | 2015-07-09 07:17:17 +0800 | [diff] [blame] | 152 | static void crypto_aead_free_instance(struct crypto_instance *inst) |
| 153 | { |
| 154 | struct aead_instance *aead = aead_instance(inst); |
| 155 | |
| 156 | if (!aead->free) { |
| 157 | inst->tmpl->free(inst); |
| 158 | return; |
| 159 | } |
| 160 | |
| 161 | aead->free(aead); |
| 162 | } |
| 163 | |
Herbert Xu | b0d955b | 2015-08-14 15:30:41 +0800 | [diff] [blame] | 164 | static const struct crypto_type crypto_aead_type = { |
Herbert Xu | 5d1d65f | 2015-05-11 17:48:12 +0800 | [diff] [blame] | 165 | .extsize = crypto_alg_extsize, |
| 166 | .init_tfm = crypto_aead_init_tfm, |
Herbert Xu | ba75e15 | 2015-07-09 07:17:17 +0800 | [diff] [blame] | 167 | .free = crypto_aead_free_instance, |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 168 | #ifdef CONFIG_PROC_FS |
| 169 | .show = crypto_aead_show, |
| 170 | #endif |
Steffen Klassert | 6ad414f | 2011-09-27 07:44:27 +0200 | [diff] [blame] | 171 | .report = crypto_aead_report, |
Herbert Xu | 63293c6 | 2015-05-21 15:11:08 +0800 | [diff] [blame] | 172 | .maskclear = ~CRYPTO_ALG_TYPE_MASK, |
Herbert Xu | 5d1d65f | 2015-05-11 17:48:12 +0800 | [diff] [blame] | 173 | .maskset = CRYPTO_ALG_TYPE_MASK, |
| 174 | .type = CRYPTO_ALG_TYPE_AEAD, |
| 175 | .tfmsize = offsetof(struct crypto_aead, base), |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 176 | }; |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 177 | |
Herbert Xu | 6350449 | 2015-05-27 14:37:30 +0800 | [diff] [blame] | 178 | static int aead_geniv_setkey(struct crypto_aead *tfm, |
| 179 | const u8 *key, unsigned int keylen) |
| 180 | { |
| 181 | struct aead_geniv_ctx *ctx = crypto_aead_ctx(tfm); |
| 182 | |
| 183 | return crypto_aead_setkey(ctx->child, key, keylen); |
| 184 | } |
| 185 | |
| 186 | static int aead_geniv_setauthsize(struct crypto_aead *tfm, |
| 187 | unsigned int authsize) |
| 188 | { |
| 189 | struct aead_geniv_ctx *ctx = crypto_aead_ctx(tfm); |
| 190 | |
| 191 | return crypto_aead_setauthsize(ctx->child, authsize); |
| 192 | } |
| 193 | |
Herbert Xu | 856e3f40 | 2015-05-21 15:11:13 +0800 | [diff] [blame] | 194 | struct aead_instance *aead_geniv_alloc(struct crypto_template *tmpl, |
| 195 | struct rtattr **tb, u32 type, u32 mask) |
Herbert Xu | 5b6d2d7 | 2007-12-12 19:23:36 +0800 | [diff] [blame] | 196 | { |
| 197 | const char *name; |
| 198 | struct crypto_aead_spawn *spawn; |
| 199 | struct crypto_attr_type *algt; |
Herbert Xu | 856e3f40 | 2015-05-21 15:11:13 +0800 | [diff] [blame] | 200 | struct aead_instance *inst; |
| 201 | struct aead_alg *alg; |
| 202 | unsigned int ivsize; |
| 203 | unsigned int maxauthsize; |
Herbert Xu | 5b6d2d7 | 2007-12-12 19:23:36 +0800 | [diff] [blame] | 204 | int err; |
| 205 | |
| 206 | algt = crypto_get_attr_type(tb); |
Herbert Xu | 5b6d2d7 | 2007-12-12 19:23:36 +0800 | [diff] [blame] | 207 | if (IS_ERR(algt)) |
Julia Lawall | 3e8afe3 | 2013-01-22 12:29:26 +0100 | [diff] [blame] | 208 | return ERR_CAST(algt); |
Herbert Xu | 5b6d2d7 | 2007-12-12 19:23:36 +0800 | [diff] [blame] | 209 | |
Herbert Xu | 5e4b8c1 | 2015-08-13 17:29:06 +0800 | [diff] [blame] | 210 | if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask) |
Herbert Xu | 5b6d2d7 | 2007-12-12 19:23:36 +0800 | [diff] [blame] | 211 | return ERR_PTR(-EINVAL); |
| 212 | |
| 213 | name = crypto_attr_alg_name(tb[1]); |
Herbert Xu | 5b6d2d7 | 2007-12-12 19:23:36 +0800 | [diff] [blame] | 214 | if (IS_ERR(name)) |
Julia Lawall | 3e8afe3 | 2013-01-22 12:29:26 +0100 | [diff] [blame] | 215 | return ERR_CAST(name); |
Herbert Xu | 5b6d2d7 | 2007-12-12 19:23:36 +0800 | [diff] [blame] | 216 | |
| 217 | inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL); |
| 218 | if (!inst) |
| 219 | return ERR_PTR(-ENOMEM); |
| 220 | |
Herbert Xu | 856e3f40 | 2015-05-21 15:11:13 +0800 | [diff] [blame] | 221 | spawn = aead_instance_ctx(inst); |
Herbert Xu | 5b6d2d7 | 2007-12-12 19:23:36 +0800 | [diff] [blame] | 222 | |
| 223 | /* Ignore async algorithms if necessary. */ |
| 224 | mask |= crypto_requires_sync(algt->type, algt->mask); |
| 225 | |
Herbert Xu | 856e3f40 | 2015-05-21 15:11:13 +0800 | [diff] [blame] | 226 | crypto_set_aead_spawn(spawn, aead_crypto_instance(inst)); |
Herbert Xu | b0d955b | 2015-08-14 15:30:41 +0800 | [diff] [blame] | 227 | err = crypto_grab_aead(spawn, name, type, mask); |
Herbert Xu | 5b6d2d7 | 2007-12-12 19:23:36 +0800 | [diff] [blame] | 228 | if (err) |
| 229 | goto err_free_inst; |
| 230 | |
Herbert Xu | 856e3f40 | 2015-05-21 15:11:13 +0800 | [diff] [blame] | 231 | alg = crypto_spawn_aead_alg(spawn); |
| 232 | |
Herbert Xu | 30e4c01 | 2015-05-22 16:30:48 +0800 | [diff] [blame] | 233 | ivsize = crypto_aead_alg_ivsize(alg); |
| 234 | maxauthsize = crypto_aead_alg_maxauthsize(alg); |
Herbert Xu | 5b6d2d7 | 2007-12-12 19:23:36 +0800 | [diff] [blame] | 235 | |
| 236 | err = -EINVAL; |
Herbert Xu | 6350449 | 2015-05-27 14:37:30 +0800 | [diff] [blame] | 237 | if (ivsize < sizeof(u64)) |
Herbert Xu | 5b6d2d7 | 2007-12-12 19:23:36 +0800 | [diff] [blame] | 238 | goto err_drop_alg; |
| 239 | |
Herbert Xu | 856e3f40 | 2015-05-21 15:11:13 +0800 | [diff] [blame] | 240 | err = -ENAMETOOLONG; |
| 241 | if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, |
| 242 | "%s(%s)", tmpl->name, alg->base.cra_name) >= |
| 243 | CRYPTO_MAX_ALG_NAME) |
| 244 | goto err_drop_alg; |
| 245 | if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME, |
| 246 | "%s(%s)", tmpl->name, alg->base.cra_driver_name) >= |
| 247 | CRYPTO_MAX_ALG_NAME) |
| 248 | goto err_drop_alg; |
Herbert Xu | 5b6d2d7 | 2007-12-12 19:23:36 +0800 | [diff] [blame] | 249 | |
Herbert Xu | 5e4b8c1 | 2015-08-13 17:29:06 +0800 | [diff] [blame] | 250 | inst->alg.base.cra_flags = alg->base.cra_flags & CRYPTO_ALG_ASYNC; |
Herbert Xu | 856e3f40 | 2015-05-21 15:11:13 +0800 | [diff] [blame] | 251 | inst->alg.base.cra_priority = alg->base.cra_priority; |
| 252 | inst->alg.base.cra_blocksize = alg->base.cra_blocksize; |
| 253 | inst->alg.base.cra_alignmask = alg->base.cra_alignmask; |
Herbert Xu | 6350449 | 2015-05-27 14:37:30 +0800 | [diff] [blame] | 254 | inst->alg.base.cra_ctxsize = sizeof(struct aead_geniv_ctx); |
| 255 | |
| 256 | inst->alg.setkey = aead_geniv_setkey; |
| 257 | inst->alg.setauthsize = aead_geniv_setauthsize; |
Herbert Xu | 5b6d2d7 | 2007-12-12 19:23:36 +0800 | [diff] [blame] | 258 | |
Herbert Xu | 856e3f40 | 2015-05-21 15:11:13 +0800 | [diff] [blame] | 259 | inst->alg.ivsize = ivsize; |
| 260 | inst->alg.maxauthsize = maxauthsize; |
Herbert Xu | 5b6d2d7 | 2007-12-12 19:23:36 +0800 | [diff] [blame] | 261 | |
| 262 | out: |
| 263 | return inst; |
| 264 | |
| 265 | err_drop_alg: |
| 266 | crypto_drop_aead(spawn); |
| 267 | err_free_inst: |
| 268 | kfree(inst); |
| 269 | inst = ERR_PTR(err); |
| 270 | goto out; |
| 271 | } |
| 272 | EXPORT_SYMBOL_GPL(aead_geniv_alloc); |
| 273 | |
Herbert Xu | 856e3f40 | 2015-05-21 15:11:13 +0800 | [diff] [blame] | 274 | void aead_geniv_free(struct aead_instance *inst) |
Herbert Xu | 5b6d2d7 | 2007-12-12 19:23:36 +0800 | [diff] [blame] | 275 | { |
Herbert Xu | 856e3f40 | 2015-05-21 15:11:13 +0800 | [diff] [blame] | 276 | crypto_drop_aead(aead_instance_ctx(inst)); |
Herbert Xu | 5b6d2d7 | 2007-12-12 19:23:36 +0800 | [diff] [blame] | 277 | kfree(inst); |
| 278 | } |
| 279 | EXPORT_SYMBOL_GPL(aead_geniv_free); |
| 280 | |
Herbert Xu | 149a397 | 2015-08-13 17:28:58 +0800 | [diff] [blame] | 281 | int aead_init_geniv(struct crypto_aead *aead) |
| 282 | { |
| 283 | struct aead_geniv_ctx *ctx = crypto_aead_ctx(aead); |
| 284 | struct aead_instance *inst = aead_alg_instance(aead); |
| 285 | struct crypto_aead *child; |
| 286 | int err; |
| 287 | |
| 288 | spin_lock_init(&ctx->lock); |
| 289 | |
| 290 | err = crypto_get_default_rng(); |
| 291 | if (err) |
| 292 | goto out; |
| 293 | |
| 294 | err = crypto_rng_get_bytes(crypto_default_rng, ctx->salt, |
| 295 | crypto_aead_ivsize(aead)); |
| 296 | crypto_put_default_rng(); |
| 297 | if (err) |
| 298 | goto out; |
| 299 | |
Eric Biggers | 3a2d4fb | 2017-12-07 10:56:34 -0800 | [diff] [blame] | 300 | ctx->sknull = crypto_get_default_null_skcipher(); |
Herbert Xu | ca0494c | 2016-07-12 13:17:42 +0800 | [diff] [blame] | 301 | err = PTR_ERR(ctx->sknull); |
| 302 | if (IS_ERR(ctx->sknull)) |
| 303 | goto out; |
| 304 | |
Herbert Xu | 149a397 | 2015-08-13 17:28:58 +0800 | [diff] [blame] | 305 | child = crypto_spawn_aead(aead_instance_ctx(inst)); |
| 306 | err = PTR_ERR(child); |
| 307 | if (IS_ERR(child)) |
| 308 | goto drop_null; |
| 309 | |
| 310 | ctx->child = child; |
| 311 | crypto_aead_set_reqsize(aead, crypto_aead_reqsize(child) + |
| 312 | sizeof(struct aead_request)); |
| 313 | |
| 314 | err = 0; |
| 315 | |
| 316 | out: |
| 317 | return err; |
| 318 | |
| 319 | drop_null: |
Eric Biggers | 3a2d4fb | 2017-12-07 10:56:34 -0800 | [diff] [blame] | 320 | crypto_put_default_null_skcipher(); |
Herbert Xu | 149a397 | 2015-08-13 17:28:58 +0800 | [diff] [blame] | 321 | goto out; |
| 322 | } |
| 323 | EXPORT_SYMBOL_GPL(aead_init_geniv); |
| 324 | |
| 325 | void aead_exit_geniv(struct crypto_aead *tfm) |
| 326 | { |
| 327 | struct aead_geniv_ctx *ctx = crypto_aead_ctx(tfm); |
| 328 | |
| 329 | crypto_free_aead(ctx->child); |
Eric Biggers | 3a2d4fb | 2017-12-07 10:56:34 -0800 | [diff] [blame] | 330 | crypto_put_default_null_skcipher(); |
Herbert Xu | 149a397 | 2015-08-13 17:28:58 +0800 | [diff] [blame] | 331 | } |
| 332 | EXPORT_SYMBOL_GPL(aead_exit_geniv); |
| 333 | |
Herbert Xu | d29ce98 | 2007-12-12 19:24:27 +0800 | [diff] [blame] | 334 | int crypto_grab_aead(struct crypto_aead_spawn *spawn, const char *name, |
| 335 | u32 type, u32 mask) |
| 336 | { |
Herbert Xu | 5d1d65f | 2015-05-11 17:48:12 +0800 | [diff] [blame] | 337 | spawn->base.frontend = &crypto_aead_type; |
| 338 | return crypto_grab_spawn(&spawn->base, name, type, mask); |
Herbert Xu | d29ce98 | 2007-12-12 19:24:27 +0800 | [diff] [blame] | 339 | } |
| 340 | EXPORT_SYMBOL_GPL(crypto_grab_aead); |
| 341 | |
| 342 | struct crypto_aead *crypto_alloc_aead(const char *alg_name, u32 type, u32 mask) |
| 343 | { |
Herbert Xu | 5d1d65f | 2015-05-11 17:48:12 +0800 | [diff] [blame] | 344 | return crypto_alloc_tfm(alg_name, &crypto_aead_type, type, mask); |
Herbert Xu | d29ce98 | 2007-12-12 19:24:27 +0800 | [diff] [blame] | 345 | } |
| 346 | EXPORT_SYMBOL_GPL(crypto_alloc_aead); |
| 347 | |
Herbert Xu | 63293c6 | 2015-05-21 15:11:08 +0800 | [diff] [blame] | 348 | static int aead_prepare_alg(struct aead_alg *alg) |
| 349 | { |
| 350 | struct crypto_alg *base = &alg->base; |
| 351 | |
Herbert Xu | 7a530aa | 2016-07-12 13:17:33 +0800 | [diff] [blame] | 352 | if (max3(alg->maxauthsize, alg->ivsize, alg->chunksize) > |
| 353 | PAGE_SIZE / 8) |
Herbert Xu | 63293c6 | 2015-05-21 15:11:08 +0800 | [diff] [blame] | 354 | return -EINVAL; |
| 355 | |
Herbert Xu | 7a530aa | 2016-07-12 13:17:33 +0800 | [diff] [blame] | 356 | if (!alg->chunksize) |
| 357 | alg->chunksize = base->cra_blocksize; |
| 358 | |
Herbert Xu | b0d955b | 2015-08-14 15:30:41 +0800 | [diff] [blame] | 359 | base->cra_type = &crypto_aead_type; |
Herbert Xu | 63293c6 | 2015-05-21 15:11:08 +0800 | [diff] [blame] | 360 | base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK; |
| 361 | base->cra_flags |= CRYPTO_ALG_TYPE_AEAD; |
| 362 | |
| 363 | return 0; |
| 364 | } |
| 365 | |
| 366 | int crypto_register_aead(struct aead_alg *alg) |
| 367 | { |
| 368 | struct crypto_alg *base = &alg->base; |
| 369 | int err; |
| 370 | |
| 371 | err = aead_prepare_alg(alg); |
| 372 | if (err) |
| 373 | return err; |
| 374 | |
| 375 | return crypto_register_alg(base); |
| 376 | } |
| 377 | EXPORT_SYMBOL_GPL(crypto_register_aead); |
| 378 | |
Herbert Xu | 4361536 | 2015-05-28 22:07:57 +0800 | [diff] [blame] | 379 | void crypto_unregister_aead(struct aead_alg *alg) |
Herbert Xu | 63293c6 | 2015-05-21 15:11:08 +0800 | [diff] [blame] | 380 | { |
Herbert Xu | 4361536 | 2015-05-28 22:07:57 +0800 | [diff] [blame] | 381 | crypto_unregister_alg(&alg->base); |
Herbert Xu | 63293c6 | 2015-05-21 15:11:08 +0800 | [diff] [blame] | 382 | } |
| 383 | EXPORT_SYMBOL_GPL(crypto_unregister_aead); |
| 384 | |
Herbert Xu | caab946 | 2015-05-28 22:07:59 +0800 | [diff] [blame] | 385 | int crypto_register_aeads(struct aead_alg *algs, int count) |
| 386 | { |
| 387 | int i, ret; |
| 388 | |
| 389 | for (i = 0; i < count; i++) { |
| 390 | ret = crypto_register_aead(&algs[i]); |
| 391 | if (ret) |
| 392 | goto err; |
| 393 | } |
| 394 | |
| 395 | return 0; |
| 396 | |
| 397 | err: |
| 398 | for (--i; i >= 0; --i) |
| 399 | crypto_unregister_aead(&algs[i]); |
| 400 | |
| 401 | return ret; |
| 402 | } |
| 403 | EXPORT_SYMBOL_GPL(crypto_register_aeads); |
| 404 | |
| 405 | void crypto_unregister_aeads(struct aead_alg *algs, int count) |
| 406 | { |
| 407 | int i; |
| 408 | |
| 409 | for (i = count - 1; i >= 0; --i) |
| 410 | crypto_unregister_aead(&algs[i]); |
| 411 | } |
| 412 | EXPORT_SYMBOL_GPL(crypto_unregister_aeads); |
| 413 | |
Herbert Xu | 63293c6 | 2015-05-21 15:11:08 +0800 | [diff] [blame] | 414 | int aead_register_instance(struct crypto_template *tmpl, |
| 415 | struct aead_instance *inst) |
| 416 | { |
| 417 | int err; |
| 418 | |
| 419 | err = aead_prepare_alg(&inst->alg); |
| 420 | if (err) |
| 421 | return err; |
| 422 | |
| 423 | return crypto_register_instance(tmpl, aead_crypto_instance(inst)); |
| 424 | } |
| 425 | EXPORT_SYMBOL_GPL(aead_register_instance); |
| 426 | |
Herbert Xu | 1ae9782 | 2007-08-30 15:36:14 +0800 | [diff] [blame] | 427 | MODULE_LICENSE("GPL"); |
| 428 | MODULE_DESCRIPTION("Authenticated Encryption with Associated Data (AEAD)"); |