*
* This file provides API support for AEAD algorithms.
*
- * Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au>
+ * Copyright (c) 2007-2015 Herbert Xu <herbert@gondor.apana.org.au>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
*/
#include <crypto/internal/geniv.h>
+#include <crypto/internal/rng.h>
+#include <crypto/null.h>
#include <crypto/scatterwalk.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/rtnetlink.h>
-#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/seq_file.h>
#include <linux/cryptouser.h>
#include "internal.h"
-struct compat_request_ctx {
- struct scatterlist src[2];
- struct scatterlist dst[2];
- struct scatterlist ivbuf[2];
- struct scatterlist *ivsg;
- struct aead_givcrypt_request subreq;
-};
-
-static int aead_null_givencrypt(struct aead_givcrypt_request *req);
-static int aead_null_givdecrypt(struct aead_givcrypt_request *req);
-
static int setkey_unaligned(struct crypto_aead *tfm, const u8 *key,
unsigned int keylen)
{
alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
memcpy(alignbuffer, key, keylen);
- ret = tfm->setkey(tfm, alignbuffer, keylen);
+ ret = crypto_aead_alg(tfm)->setkey(tfm, alignbuffer, keylen);
memset(alignbuffer, 0, keylen);
kfree(buffer);
return ret;
{
unsigned long alignmask = crypto_aead_alignmask(tfm);
- tfm = tfm->child;
-
if ((unsigned long)key & alignmask)
return setkey_unaligned(tfm, key, keylen);
- return tfm->setkey(tfm, key, keylen);
+ return crypto_aead_alg(tfm)->setkey(tfm, key, keylen);
}
EXPORT_SYMBOL_GPL(crypto_aead_setkey);
if (authsize > crypto_aead_maxauthsize(tfm))
return -EINVAL;
- if (tfm->setauthsize) {
- err = tfm->setauthsize(tfm->child, authsize);
+ if (crypto_aead_alg(tfm)->setauthsize) {
+ err = crypto_aead_alg(tfm)->setauthsize(tfm, authsize);
if (err)
return err;
}
- tfm->child->authsize = authsize;
tfm->authsize = authsize;
return 0;
}
EXPORT_SYMBOL_GPL(crypto_aead_setauthsize);
-struct aead_old_request {
- struct scatterlist srcbuf[2];
- struct scatterlist dstbuf[2];
- struct aead_request subreq;
-};
-
-unsigned int crypto_aead_reqsize(struct crypto_aead *tfm)
-{
- return tfm->reqsize + sizeof(struct aead_old_request);
-}
-EXPORT_SYMBOL_GPL(crypto_aead_reqsize);
-
-static int old_crypt(struct aead_request *req,
- int (*crypt)(struct aead_request *req))
-{
- struct aead_old_request *nreq = aead_request_ctx(req);
- struct crypto_aead *aead = crypto_aead_reqtfm(req);
- struct scatterlist *src, *dst;
-
- if (req->old)
- return crypt(req);
-
- src = scatterwalk_ffwd(nreq->srcbuf, req->src, req->assoclen);
- dst = req->src == req->dst ?
- src : scatterwalk_ffwd(nreq->dstbuf, req->dst, req->assoclen);
-
- aead_request_set_tfm(&nreq->subreq, aead);
- aead_request_set_callback(&nreq->subreq, aead_request_flags(req),
- req->base.complete, req->base.data);
- aead_request_set_crypt(&nreq->subreq, src, dst, req->cryptlen,
- req->iv);
- aead_request_set_assoc(&nreq->subreq, req->src, req->assoclen);
-
- return crypt(&nreq->subreq);
-}
-
-static int old_encrypt(struct aead_request *req)
-{
- struct crypto_aead *aead = crypto_aead_reqtfm(req);
- struct old_aead_alg *alg = crypto_old_aead_alg(aead);
-
- return old_crypt(req, alg->encrypt);
-}
-
-static int old_decrypt(struct aead_request *req)
-{
- struct crypto_aead *aead = crypto_aead_reqtfm(req);
- struct old_aead_alg *alg = crypto_old_aead_alg(aead);
-
- return old_crypt(req, alg->decrypt);
-}
-
-static int no_givcrypt(struct aead_givcrypt_request *req)
-{
- return -ENOSYS;
-}
-
-static int crypto_old_aead_init_tfm(struct crypto_tfm *tfm)
-{
- struct old_aead_alg *alg = &tfm->__crt_alg->cra_aead;
- struct crypto_aead *crt = __crypto_aead_cast(tfm);
-
- if (max(alg->maxauthsize, alg->ivsize) > PAGE_SIZE / 8)
- return -EINVAL;
-
- crt->setkey = alg->setkey;
- crt->setauthsize = alg->setauthsize;
- crt->encrypt = old_encrypt;
- crt->decrypt = old_decrypt;
- if (alg->ivsize) {
- crt->givencrypt = alg->givencrypt ?: no_givcrypt;
- crt->givdecrypt = alg->givdecrypt ?: no_givcrypt;
- } else {
- crt->givencrypt = aead_null_givencrypt;
- crt->givdecrypt = aead_null_givdecrypt;
- }
- crt->child = __crypto_aead_cast(tfm);
- crt->authsize = alg->maxauthsize;
-
- return 0;
-}
-
static void crypto_aead_exit_tfm(struct crypto_tfm *tfm)
{
struct crypto_aead *aead = __crypto_aead_cast(tfm);
struct crypto_aead *aead = __crypto_aead_cast(tfm);
struct aead_alg *alg = crypto_aead_alg(aead);
- if (crypto_old_aead_alg(aead)->encrypt)
- return crypto_old_aead_init_tfm(tfm);
-
- aead->setkey = alg->setkey;
- aead->setauthsize = alg->setauthsize;
- aead->encrypt = alg->encrypt;
- aead->decrypt = alg->decrypt;
- aead->child = __crypto_aead_cast(tfm);
aead->authsize = alg->maxauthsize;
if (alg->exit)
return 0;
}
-#ifdef CONFIG_NET
-static int crypto_old_aead_report(struct sk_buff *skb, struct crypto_alg *alg)
-{
- struct crypto_report_aead raead;
- struct old_aead_alg *aead = &alg->cra_aead;
-
- strncpy(raead.type, "aead", sizeof(raead.type));
- strncpy(raead.geniv, aead->geniv ?: "<built-in>", sizeof(raead.geniv));
-
- raead.blocksize = alg->cra_blocksize;
- raead.maxauthsize = aead->maxauthsize;
- raead.ivsize = aead->ivsize;
-
- if (nla_put(skb, CRYPTOCFGA_REPORT_AEAD,
- sizeof(struct crypto_report_aead), &raead))
- goto nla_put_failure;
- return 0;
-
-nla_put_failure:
- return -EMSGSIZE;
-}
-#else
-static int crypto_old_aead_report(struct sk_buff *skb, struct crypto_alg *alg)
-{
- return -ENOSYS;
-}
-#endif
-
-static void crypto_old_aead_show(struct seq_file *m, struct crypto_alg *alg)
- __attribute__ ((unused));
-static void crypto_old_aead_show(struct seq_file *m, struct crypto_alg *alg)
-{
- struct old_aead_alg *aead = &alg->cra_aead;
-
- seq_printf(m, "type : aead\n");
- seq_printf(m, "async : %s\n", alg->cra_flags & CRYPTO_ALG_ASYNC ?
- "yes" : "no");
- seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
- seq_printf(m, "ivsize : %u\n", aead->ivsize);
- seq_printf(m, "maxauthsize : %u\n", aead->maxauthsize);
- seq_printf(m, "geniv : %s\n", aead->geniv ?: "<built-in>");
-}
-
-const struct crypto_type crypto_aead_type = {
- .extsize = crypto_alg_extsize,
- .init_tfm = crypto_aead_init_tfm,
-#ifdef CONFIG_PROC_FS
- .show = crypto_old_aead_show,
-#endif
- .report = crypto_old_aead_report,
- .lookup = crypto_lookup_aead,
- .maskclear = ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV),
- .maskset = CRYPTO_ALG_TYPE_MASK,
- .type = CRYPTO_ALG_TYPE_AEAD,
- .tfmsize = offsetof(struct crypto_aead, base),
-};
-EXPORT_SYMBOL_GPL(crypto_aead_type);
-
#ifdef CONFIG_NET
static int crypto_aead_report(struct sk_buff *skb, struct crypto_alg *alg)
{
seq_printf(m, "geniv : <none>\n");
}
-static const struct crypto_type crypto_new_aead_type = {
- .extsize = crypto_alg_extsize,
- .init_tfm = crypto_aead_init_tfm,
-#ifdef CONFIG_PROC_FS
- .show = crypto_aead_show,
-#endif
- .report = crypto_aead_report,
- .maskclear = ~CRYPTO_ALG_TYPE_MASK,
- .maskset = CRYPTO_ALG_TYPE_MASK,
- .type = CRYPTO_ALG_TYPE_AEAD,
- .tfmsize = offsetof(struct crypto_aead, base),
-};
-
-static int aead_null_givencrypt(struct aead_givcrypt_request *req)
-{
- return crypto_aead_encrypt(&req->areq);
-}
-
-static int aead_null_givdecrypt(struct aead_givcrypt_request *req)
-{
- return crypto_aead_decrypt(&req->areq);
-}
-
-#ifdef CONFIG_NET
-static int crypto_nivaead_report(struct sk_buff *skb, struct crypto_alg *alg)
-{
- struct crypto_report_aead raead;
- struct old_aead_alg *aead = &alg->cra_aead;
-
- strncpy(raead.type, "nivaead", sizeof(raead.type));
- strncpy(raead.geniv, aead->geniv, sizeof(raead.geniv));
-
- raead.blocksize = alg->cra_blocksize;
- raead.maxauthsize = aead->maxauthsize;
- raead.ivsize = aead->ivsize;
-
- if (nla_put(skb, CRYPTOCFGA_REPORT_AEAD,
- sizeof(struct crypto_report_aead), &raead))
- goto nla_put_failure;
- return 0;
-
-nla_put_failure:
- return -EMSGSIZE;
-}
-#else
-static int crypto_nivaead_report(struct sk_buff *skb, struct crypto_alg *alg)
+static void crypto_aead_free_instance(struct crypto_instance *inst)
{
- return -ENOSYS;
-}
-#endif
-
+ struct aead_instance *aead = aead_instance(inst);
-static void crypto_nivaead_show(struct seq_file *m, struct crypto_alg *alg)
- __attribute__ ((unused));
-static void crypto_nivaead_show(struct seq_file *m, struct crypto_alg *alg)
-{
- struct old_aead_alg *aead = &alg->cra_aead;
+ if (!aead->free) {
+ inst->tmpl->free(inst);
+ return;
+ }
- seq_printf(m, "type : nivaead\n");
- seq_printf(m, "async : %s\n", alg->cra_flags & CRYPTO_ALG_ASYNC ?
- "yes" : "no");
- seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
- seq_printf(m, "ivsize : %u\n", aead->ivsize);
- seq_printf(m, "maxauthsize : %u\n", aead->maxauthsize);
- seq_printf(m, "geniv : %s\n", aead->geniv);
+ aead->free(aead);
}
-const struct crypto_type crypto_nivaead_type = {
+static const struct crypto_type crypto_aead_type = {
.extsize = crypto_alg_extsize,
.init_tfm = crypto_aead_init_tfm,
+ .free = crypto_aead_free_instance,
#ifdef CONFIG_PROC_FS
- .show = crypto_nivaead_show,
+ .show = crypto_aead_show,
#endif
- .report = crypto_nivaead_report,
- .maskclear = ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV),
- .maskset = CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV,
+ .report = crypto_aead_report,
+ .maskclear = ~CRYPTO_ALG_TYPE_MASK,
+ .maskset = CRYPTO_ALG_TYPE_MASK,
.type = CRYPTO_ALG_TYPE_AEAD,
.tfmsize = offsetof(struct crypto_aead, base),
};
-EXPORT_SYMBOL_GPL(crypto_nivaead_type);
-
-static int crypto_grab_nivaead(struct crypto_aead_spawn *spawn,
- const char *name, u32 type, u32 mask)
-{
- spawn->base.frontend = &crypto_nivaead_type;
- return crypto_grab_spawn(&spawn->base, name, type, mask);
-}
static int aead_geniv_setkey(struct crypto_aead *tfm,
const u8 *key, unsigned int keylen)
return crypto_aead_setauthsize(ctx->child, authsize);
}
-static void compat_encrypt_complete2(struct aead_request *req, int err)
-{
- struct compat_request_ctx *rctx = aead_request_ctx(req);
- struct aead_givcrypt_request *subreq = &rctx->subreq;
- struct crypto_aead *geniv;
-
- if (err == -EINPROGRESS)
- return;
-
- if (err)
- goto out;
-
- geniv = crypto_aead_reqtfm(req);
- scatterwalk_map_and_copy(subreq->giv, rctx->ivsg, 0,
- crypto_aead_ivsize(geniv), 1);
-
-out:
- kzfree(subreq->giv);
-}
-
-static void compat_encrypt_complete(struct crypto_async_request *base, int err)
-{
- struct aead_request *req = base->data;
-
- compat_encrypt_complete2(req, err);
- aead_request_complete(req, err);
-}
-
-static int compat_encrypt(struct aead_request *req)
-{
- struct crypto_aead *geniv = crypto_aead_reqtfm(req);
- struct aead_geniv_ctx *ctx = crypto_aead_ctx(geniv);
- struct compat_request_ctx *rctx = aead_request_ctx(req);
- struct aead_givcrypt_request *subreq = &rctx->subreq;
- unsigned int ivsize = crypto_aead_ivsize(geniv);
- struct scatterlist *src, *dst;
- crypto_completion_t compl;
- void *data;
- u8 *info;
- __be64 seq;
- int err;
-
- if (req->cryptlen < ivsize)
- return -EINVAL;
-
- compl = req->base.complete;
- data = req->base.data;
-
- rctx->ivsg = scatterwalk_ffwd(rctx->ivbuf, req->dst, req->assoclen);
- info = PageHighMem(sg_page(rctx->ivsg)) ? NULL : sg_virt(rctx->ivsg);
-
- if (!info) {
- info = kmalloc(ivsize, req->base.flags &
- CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL:
- GFP_ATOMIC);
- if (!info)
- return -ENOMEM;
-
- compl = compat_encrypt_complete;
- data = req;
- }
-
- memcpy(&seq, req->iv + ivsize - sizeof(seq), sizeof(seq));
-
- src = scatterwalk_ffwd(rctx->src, req->src, req->assoclen + ivsize);
- dst = req->src == req->dst ?
- src : scatterwalk_ffwd(rctx->dst, rctx->ivsg, ivsize);
-
- aead_givcrypt_set_tfm(subreq, ctx->child);
- aead_givcrypt_set_callback(subreq, req->base.flags,
- req->base.complete, req->base.data);
- aead_givcrypt_set_crypt(subreq, src, dst,
- req->cryptlen - ivsize, req->iv);
- aead_givcrypt_set_assoc(subreq, req->src, req->assoclen);
- aead_givcrypt_set_giv(subreq, info, be64_to_cpu(seq));
-
- err = crypto_aead_givencrypt(subreq);
- if (unlikely(PageHighMem(sg_page(rctx->ivsg))))
- compat_encrypt_complete2(req, err);
- return err;
-}
-
-static int compat_decrypt(struct aead_request *req)
-{
- struct crypto_aead *geniv = crypto_aead_reqtfm(req);
- struct aead_geniv_ctx *ctx = crypto_aead_ctx(geniv);
- struct compat_request_ctx *rctx = aead_request_ctx(req);
- struct aead_request *subreq = &rctx->subreq.areq;
- unsigned int ivsize = crypto_aead_ivsize(geniv);
- struct scatterlist *src, *dst;
- crypto_completion_t compl;
- void *data;
-
- if (req->cryptlen < ivsize)
- return -EINVAL;
-
- aead_request_set_tfm(subreq, ctx->child);
-
- compl = req->base.complete;
- data = req->base.data;
-
- src = scatterwalk_ffwd(rctx->src, req->src, req->assoclen + ivsize);
- dst = req->src == req->dst ?
- src : scatterwalk_ffwd(rctx->dst, req->dst,
- req->assoclen + ivsize);
-
- aead_request_set_callback(subreq, req->base.flags, compl, data);
- aead_request_set_crypt(subreq, src, dst,
- req->cryptlen - ivsize, req->iv);
- aead_request_set_assoc(subreq, req->src, req->assoclen);
-
- scatterwalk_map_and_copy(req->iv, req->src, req->assoclen, ivsize, 0);
-
- return crypto_aead_decrypt(subreq);
-}
-
-static int compat_encrypt_first(struct aead_request *req)
-{
- struct crypto_aead *geniv = crypto_aead_reqtfm(req);
- struct aead_geniv_ctx *ctx = crypto_aead_ctx(geniv);
- int err = 0;
-
- spin_lock_bh(&ctx->lock);
- if (geniv->encrypt != compat_encrypt_first)
- goto unlock;
-
- geniv->encrypt = compat_encrypt;
-
-unlock:
- spin_unlock_bh(&ctx->lock);
-
- if (err)
- return err;
-
- return compat_encrypt(req);
-}
-
-static int aead_geniv_init_compat(struct crypto_tfm *tfm)
-{
- struct crypto_aead *geniv = __crypto_aead_cast(tfm);
- struct aead_geniv_ctx *ctx = crypto_aead_ctx(geniv);
- int err;
-
- spin_lock_init(&ctx->lock);
-
- crypto_aead_set_reqsize(geniv, sizeof(struct compat_request_ctx));
-
- err = aead_geniv_init(tfm);
-
- ctx->child = geniv->child;
- geniv->child = geniv;
-
- return err;
-}
-
-static void aead_geniv_exit_compat(struct crypto_tfm *tfm)
-{
- struct crypto_aead *geniv = __crypto_aead_cast(tfm);
- struct aead_geniv_ctx *ctx = crypto_aead_ctx(geniv);
-
- crypto_free_aead(ctx->child);
-}
-
struct aead_instance *aead_geniv_alloc(struct crypto_template *tmpl,
struct rtattr **tb, u32 type, u32 mask)
{
if (IS_ERR(algt))
return ERR_CAST(algt);
- if ((algt->type ^ (CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_GENIV)) &
- algt->mask)
+ if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
return ERR_PTR(-EINVAL);
name = crypto_attr_alg_name(tb[1]);
mask |= crypto_requires_sync(algt->type, algt->mask);
crypto_set_aead_spawn(spawn, aead_crypto_instance(inst));
- err = (algt->mask & CRYPTO_ALG_GENIV) ?
- crypto_grab_nivaead(spawn, name, type, mask) :
- crypto_grab_aead(spawn, name, type, mask);
+ err = crypto_grab_aead(spawn, name, type, mask);
if (err)
goto err_free_inst;
if (ivsize < sizeof(u64))
goto err_drop_alg;
- /*
- * This is only true if we're constructing an algorithm with its
- * default IV generator. For the default generator we elide the
- * template name and double-check the IV generator.
- */
- if (algt->mask & CRYPTO_ALG_GENIV) {
- if (!alg->base.cra_aead.encrypt)
- goto err_drop_alg;
- if (strcmp(tmpl->name, alg->base.cra_aead.geniv))
- goto err_drop_alg;
-
- memcpy(inst->alg.base.cra_name, alg->base.cra_name,
- CRYPTO_MAX_ALG_NAME);
- memcpy(inst->alg.base.cra_driver_name,
- alg->base.cra_driver_name, CRYPTO_MAX_ALG_NAME);
-
- inst->alg.base.cra_flags = CRYPTO_ALG_TYPE_AEAD |
- CRYPTO_ALG_GENIV;
- 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 = alg->base.cra_blocksize;
- inst->alg.base.cra_alignmask = alg->base.cra_alignmask;
- inst->alg.base.cra_type = &crypto_aead_type;
-
- inst->alg.base.cra_aead.ivsize = ivsize;
- inst->alg.base.cra_aead.maxauthsize = maxauthsize;
-
- inst->alg.base.cra_aead.setkey = alg->base.cra_aead.setkey;
- inst->alg.base.cra_aead.setauthsize =
- alg->base.cra_aead.setauthsize;
- inst->alg.base.cra_aead.encrypt = alg->base.cra_aead.encrypt;
- inst->alg.base.cra_aead.decrypt = alg->base.cra_aead.decrypt;
-
- goto out;
- }
-
err = -ENAMETOOLONG;
if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME,
"%s(%s)", tmpl->name, alg->base.cra_name) >=
inst->alg.ivsize = ivsize;
inst->alg.maxauthsize = maxauthsize;
- inst->alg.encrypt = compat_encrypt_first;
- inst->alg.decrypt = compat_decrypt;
-
- inst->alg.base.cra_init = aead_geniv_init_compat;
- inst->alg.base.cra_exit = aead_geniv_exit_compat;
-
out:
return inst;
}
EXPORT_SYMBOL_GPL(aead_geniv_free);
-int aead_geniv_init(struct crypto_tfm *tfm)
+int aead_init_geniv(struct crypto_aead *aead)
{
- struct crypto_instance *inst = (void *)tfm->__crt_alg;
+ struct aead_geniv_ctx *ctx = crypto_aead_ctx(aead);
+ struct aead_instance *inst = aead_alg_instance(aead);
struct crypto_aead *child;
- struct crypto_aead *aead;
-
- aead = __crypto_aead_cast(tfm);
-
- child = crypto_spawn_aead(crypto_instance_ctx(inst));
- if (IS_ERR(child))
- return PTR_ERR(child);
-
- aead->child = child;
- aead->reqsize += crypto_aead_reqsize(child);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(aead_geniv_init);
-
-void aead_geniv_exit(struct crypto_tfm *tfm)
-{
- crypto_free_aead(__crypto_aead_cast(tfm)->child);
-}
-EXPORT_SYMBOL_GPL(aead_geniv_exit);
-
-static int crypto_nivaead_default(struct crypto_alg *alg, u32 type, u32 mask)
-{
- struct rtattr *tb[3];
- struct {
- struct rtattr attr;
- struct crypto_attr_type data;
- } ptype;
- struct {
- struct rtattr attr;
- struct crypto_attr_alg data;
- } palg;
- struct crypto_template *tmpl;
- struct crypto_instance *inst;
- struct crypto_alg *larval;
- const char *geniv;
int err;
- larval = crypto_larval_lookup(alg->cra_driver_name,
- CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_GENIV,
- CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV);
- err = PTR_ERR(larval);
- if (IS_ERR(larval))
- goto out;
-
- err = -EAGAIN;
- if (!crypto_is_larval(larval))
- goto drop_larval;
-
- ptype.attr.rta_len = sizeof(ptype);
- ptype.attr.rta_type = CRYPTOA_TYPE;
- ptype.data.type = type | CRYPTO_ALG_GENIV;
- /* GENIV tells the template that we're making a default geniv. */
- ptype.data.mask = mask | CRYPTO_ALG_GENIV;
- tb[0] = &ptype.attr;
-
- palg.attr.rta_len = sizeof(palg);
- palg.attr.rta_type = CRYPTOA_ALG;
- /* Must use the exact name to locate ourselves. */
- memcpy(palg.data.name, alg->cra_driver_name, CRYPTO_MAX_ALG_NAME);
- tb[1] = &palg.attr;
-
- tb[2] = NULL;
+ spin_lock_init(&ctx->lock);
- geniv = alg->cra_aead.geniv;
+ err = crypto_get_default_rng();
+ if (err)
+ goto out;
- tmpl = crypto_lookup_template(geniv);
- err = -ENOENT;
- if (!tmpl)
- goto kill_larval;
+ err = crypto_rng_get_bytes(crypto_default_rng, ctx->salt,
+ crypto_aead_ivsize(aead));
+ crypto_put_default_rng();
+ if (err)
+ goto out;
- if (tmpl->create) {
- err = tmpl->create(tmpl, tb);
- if (err)
- goto put_tmpl;
- goto ok;
- }
+ ctx->null = crypto_get_default_null_skcipher();
+ err = PTR_ERR(ctx->null);
+ if (IS_ERR(ctx->null))
+ goto out;
- inst = tmpl->alloc(tb);
- err = PTR_ERR(inst);
- if (IS_ERR(inst))
- goto put_tmpl;
+ child = crypto_spawn_aead(aead_instance_ctx(inst));
+ err = PTR_ERR(child);
+ if (IS_ERR(child))
+ goto drop_null;
- err = crypto_register_instance(tmpl, inst);
- if (err) {
- tmpl->free(inst);
- goto put_tmpl;
- }
+ ctx->child = child;
+ crypto_aead_set_reqsize(aead, crypto_aead_reqsize(child) +
+ sizeof(struct aead_request));
-ok:
- /* Redo the lookup to use the instance we just registered. */
- err = -EAGAIN;
+ err = 0;
-put_tmpl:
- crypto_tmpl_put(tmpl);
-kill_larval:
- crypto_larval_kill(larval);
-drop_larval:
- crypto_mod_put(larval);
out:
- crypto_mod_put(alg);
return err;
+
+drop_null:
+ crypto_put_default_null_skcipher();
+ goto out;
}
+EXPORT_SYMBOL_GPL(aead_init_geniv);
-struct crypto_alg *crypto_lookup_aead(const char *name, u32 type, u32 mask)
+void aead_exit_geniv(struct crypto_aead *tfm)
{
- struct crypto_alg *alg;
-
- alg = crypto_alg_mod_lookup(name, type, mask);
- if (IS_ERR(alg))
- return alg;
-
- if (alg->cra_type == &crypto_aead_type)
- return alg;
-
- if (!alg->cra_aead.ivsize)
- return alg;
-
- crypto_mod_put(alg);
- alg = crypto_alg_mod_lookup(name, type | CRYPTO_ALG_TESTED,
- mask & ~CRYPTO_ALG_TESTED);
- if (IS_ERR(alg))
- return alg;
-
- if (alg->cra_type == &crypto_aead_type) {
- if (~alg->cra_flags & (type ^ ~mask) & CRYPTO_ALG_TESTED) {
- crypto_mod_put(alg);
- alg = ERR_PTR(-ENOENT);
- }
- return alg;
- }
-
- BUG_ON(!alg->cra_aead.ivsize);
+ struct aead_geniv_ctx *ctx = crypto_aead_ctx(tfm);
- return ERR_PTR(crypto_nivaead_default(alg, type, mask));
+ crypto_free_aead(ctx->child);
+ crypto_put_default_null_skcipher();
}
-EXPORT_SYMBOL_GPL(crypto_lookup_aead);
+EXPORT_SYMBOL_GPL(aead_exit_geniv);
int crypto_grab_aead(struct crypto_aead_spawn *spawn, const char *name,
u32 type, u32 mask)
if (max(alg->maxauthsize, alg->ivsize) > PAGE_SIZE / 8)
return -EINVAL;
- base->cra_type = &crypto_new_aead_type;
+ base->cra_type = &crypto_aead_type;
base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
base->cra_flags |= CRYPTO_ALG_TYPE_AEAD;
projects / linux-drm-fsl-dcu.git / blobdiff