^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * AEAD: Authenticated Encryption with Associated Data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * This file provides API support for AEAD algorithms.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (c) 2007-2015 Herbert Xu <herbert@gondor.apana.org.au>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <crypto/internal/aead.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/cryptouser.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <net/netlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static int setkey_unaligned(struct crypto_aead *tfm, const u8 *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) unsigned int keylen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) unsigned long alignmask = crypto_aead_alignmask(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) u8 *buffer, *alignbuffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) unsigned long absize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) absize = keylen + alignmask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) buffer = kmalloc(absize, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) if (!buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) memcpy(alignbuffer, key, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) ret = crypto_aead_alg(tfm)->setkey(tfm, alignbuffer, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) memset(alignbuffer, 0, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) kfree(buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) int crypto_aead_setkey(struct crypto_aead *tfm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) const u8 *key, unsigned int keylen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) unsigned long alignmask = crypto_aead_alignmask(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) if ((unsigned long)key & alignmask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) err = setkey_unaligned(tfm, key, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) err = crypto_aead_alg(tfm)->setkey(tfm, key, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) crypto_aead_set_flags(tfm, CRYPTO_TFM_NEED_KEY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) crypto_aead_clear_flags(tfm, CRYPTO_TFM_NEED_KEY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) EXPORT_SYMBOL_GPL(crypto_aead_setkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) int crypto_aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) if ((!authsize && crypto_aead_maxauthsize(tfm)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) authsize > crypto_aead_maxauthsize(tfm))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (crypto_aead_alg(tfm)->setauthsize) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) err = crypto_aead_alg(tfm)->setauthsize(tfm, authsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) tfm->authsize = authsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) EXPORT_SYMBOL_GPL(crypto_aead_setauthsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) int crypto_aead_encrypt(struct aead_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct crypto_aead *aead = crypto_aead_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) struct crypto_alg *alg = aead->base.__crt_alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) unsigned int cryptlen = req->cryptlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) crypto_stats_get(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) if (crypto_aead_get_flags(aead) & CRYPTO_TFM_NEED_KEY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) ret = -ENOKEY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) ret = crypto_aead_alg(aead)->encrypt(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) crypto_stats_aead_encrypt(cryptlen, alg, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) EXPORT_SYMBOL_GPL(crypto_aead_encrypt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) int crypto_aead_decrypt(struct aead_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) struct crypto_aead *aead = crypto_aead_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) struct crypto_alg *alg = aead->base.__crt_alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) unsigned int cryptlen = req->cryptlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) crypto_stats_get(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (crypto_aead_get_flags(aead) & CRYPTO_TFM_NEED_KEY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) ret = -ENOKEY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) else if (req->cryptlen < crypto_aead_authsize(aead))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) ret = crypto_aead_alg(aead)->decrypt(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) crypto_stats_aead_decrypt(cryptlen, alg, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) EXPORT_SYMBOL_GPL(crypto_aead_decrypt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) static void crypto_aead_exit_tfm(struct crypto_tfm *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) struct crypto_aead *aead = __crypto_aead_cast(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) struct aead_alg *alg = crypto_aead_alg(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) alg->exit(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static int crypto_aead_init_tfm(struct crypto_tfm *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) struct crypto_aead *aead = __crypto_aead_cast(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) struct aead_alg *alg = crypto_aead_alg(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) crypto_aead_set_flags(aead, CRYPTO_TFM_NEED_KEY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) aead->authsize = alg->maxauthsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (alg->exit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) aead->base.exit = crypto_aead_exit_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) if (alg->init)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) return alg->init(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) #ifdef CONFIG_NET
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static int crypto_aead_report(struct sk_buff *skb, struct crypto_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) struct crypto_report_aead raead;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) struct aead_alg *aead = container_of(alg, struct aead_alg, base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) memset(&raead, 0, sizeof(raead));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) strscpy(raead.type, "aead", sizeof(raead.type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) strscpy(raead.geniv, "<none>", sizeof(raead.geniv));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) raead.blocksize = alg->cra_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) raead.maxauthsize = aead->maxauthsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) raead.ivsize = aead->ivsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) return nla_put(skb, CRYPTOCFGA_REPORT_AEAD, sizeof(raead), &raead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) static int crypto_aead_report(struct sk_buff *skb, struct crypto_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) return -ENOSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) static void crypto_aead_show(struct seq_file *m, struct crypto_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) __maybe_unused;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) static void crypto_aead_show(struct seq_file *m, struct crypto_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) struct aead_alg *aead = container_of(alg, struct aead_alg, base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) seq_printf(m, "type : aead\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) seq_printf(m, "async : %s\n", alg->cra_flags & CRYPTO_ALG_ASYNC ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) "yes" : "no");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) seq_printf(m, "ivsize : %u\n", aead->ivsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) seq_printf(m, "maxauthsize : %u\n", aead->maxauthsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) seq_printf(m, "geniv : <none>\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) static void crypto_aead_free_instance(struct crypto_instance *inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) struct aead_instance *aead = aead_instance(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) aead->free(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) static const struct crypto_type crypto_aead_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) .extsize = crypto_alg_extsize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) .init_tfm = crypto_aead_init_tfm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) .free = crypto_aead_free_instance,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) #ifdef CONFIG_PROC_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) .show = crypto_aead_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) .report = crypto_aead_report,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) .maskclear = ~CRYPTO_ALG_TYPE_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) .maskset = CRYPTO_ALG_TYPE_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) .type = CRYPTO_ALG_TYPE_AEAD,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) .tfmsize = offsetof(struct crypto_aead, base),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) int crypto_grab_aead(struct crypto_aead_spawn *spawn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) struct crypto_instance *inst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) const char *name, u32 type, u32 mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) spawn->base.frontend = &crypto_aead_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) return crypto_grab_spawn(&spawn->base, inst, name, type, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) EXPORT_SYMBOL_GPL(crypto_grab_aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) struct crypto_aead *crypto_alloc_aead(const char *alg_name, u32 type, u32 mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) return crypto_alloc_tfm(alg_name, &crypto_aead_type, type, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) EXPORT_SYMBOL_GPL(crypto_alloc_aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) static int aead_prepare_alg(struct aead_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) struct crypto_alg *base = &alg->base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (max3(alg->maxauthsize, alg->ivsize, alg->chunksize) >
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) PAGE_SIZE / 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) if (!alg->chunksize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) alg->chunksize = base->cra_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) base->cra_type = &crypto_aead_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) base->cra_flags |= CRYPTO_ALG_TYPE_AEAD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) int crypto_register_aead(struct aead_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) struct crypto_alg *base = &alg->base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) err = aead_prepare_alg(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) return crypto_register_alg(base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) EXPORT_SYMBOL_GPL(crypto_register_aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) void crypto_unregister_aead(struct aead_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) crypto_unregister_alg(&alg->base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) EXPORT_SYMBOL_GPL(crypto_unregister_aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) int crypto_register_aeads(struct aead_alg *algs, int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) int i, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) for (i = 0; i < count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) ret = crypto_register_aead(&algs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) for (--i; i >= 0; --i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) crypto_unregister_aead(&algs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) EXPORT_SYMBOL_GPL(crypto_register_aeads);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) void crypto_unregister_aeads(struct aead_alg *algs, int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) for (i = count - 1; i >= 0; --i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) crypto_unregister_aead(&algs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) EXPORT_SYMBOL_GPL(crypto_unregister_aeads);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) int aead_register_instance(struct crypto_template *tmpl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) struct aead_instance *inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) if (WARN_ON(!inst->free))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) err = aead_prepare_alg(&inst->alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) return crypto_register_instance(tmpl, aead_crypto_instance(inst));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) EXPORT_SYMBOL_GPL(aead_register_instance);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) MODULE_DESCRIPTION("Authenticated Encryption with Associated Data (AEAD)");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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