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-rw-r--r--crypto/aead.c216
-rw-r--r--include/crypto/internal/aead.h77
-rw-r--r--include/linux/crypto.h11
3 files changed, 297 insertions, 7 deletions
diff --git a/crypto/aead.c b/crypto/aead.c
index 15335ed9010..9f7aca89192 100644
--- a/crypto/aead.c
+++ b/crypto/aead.c
@@ -12,14 +12,16 @@
*
*/
-#include <crypto/algapi.h>
-#include <linux/errno.h>
+#include <crypto/internal/aead.h>
+#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/seq_file.h>
+#include "internal.h"
+
static int setkey_unaligned(struct crypto_aead *tfm, const u8 *key,
unsigned int keylen)
{
@@ -55,18 +57,20 @@ static int setkey(struct crypto_aead *tfm, const u8 *key, unsigned int keylen)
int crypto_aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize)
{
+ struct aead_tfm *crt = crypto_aead_crt(tfm);
int err;
if (authsize > crypto_aead_alg(tfm)->maxauthsize)
return -EINVAL;
if (crypto_aead_alg(tfm)->setauthsize) {
- err = crypto_aead_alg(tfm)->setauthsize(tfm, authsize);
+ err = crypto_aead_alg(tfm)->setauthsize(crt->base, authsize);
if (err)
return err;
}
- crypto_aead_crt(tfm)->authsize = authsize;
+ crypto_aead_crt(crt->base)->authsize = authsize;
+ crt->authsize = authsize;
return 0;
}
EXPORT_SYMBOL_GPL(crypto_aead_setauthsize);
@@ -90,11 +94,13 @@ static int crypto_init_aead_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
if (max(alg->maxauthsize, alg->ivsize) > PAGE_SIZE / 8)
return -EINVAL;
- crt->setkey = setkey;
+ crt->setkey = tfm->__crt_alg->cra_flags & CRYPTO_ALG_GENIV ?
+ alg->setkey : setkey;
crt->encrypt = alg->encrypt;
crt->decrypt = alg->decrypt;
crt->givencrypt = alg->givencrypt ?: no_givcrypt;
crt->givdecrypt = alg->givdecrypt ?: no_givcrypt;
+ crt->base = __crypto_aead_cast(tfm);
crt->ivsize = alg->ivsize;
crt->authsize = alg->maxauthsize;
@@ -111,6 +117,7 @@ static void crypto_aead_show(struct seq_file *m, struct crypto_alg *alg)
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 = {
@@ -122,5 +129,204 @@ const struct crypto_type crypto_aead_type = {
};
EXPORT_SYMBOL_GPL(crypto_aead_type);
+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);
+}
+
+static int crypto_init_nivaead_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
+{
+ struct aead_alg *alg = &tfm->__crt_alg->cra_aead;
+ struct aead_tfm *crt = &tfm->crt_aead;
+
+ if (max(alg->maxauthsize, alg->ivsize) > PAGE_SIZE / 8)
+ return -EINVAL;
+
+ crt->setkey = setkey;
+ crt->encrypt = alg->encrypt;
+ crt->decrypt = alg->decrypt;
+ if (!alg->ivsize) {
+ crt->givencrypt = aead_null_givencrypt;
+ crt->givdecrypt = aead_null_givdecrypt;
+ }
+ crt->base = __crypto_aead_cast(tfm);
+ crt->ivsize = alg->ivsize;
+ crt->authsize = alg->maxauthsize;
+
+ return 0;
+}
+
+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 aead_alg *aead = &alg->cra_aead;
+
+ seq_printf(m, "type : nivaead\n");
+ 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);
+}
+
+const struct crypto_type crypto_nivaead_type = {
+ .ctxsize = crypto_aead_ctxsize,
+ .init = crypto_init_nivaead_ops,
+#ifdef CONFIG_PROC_FS
+ .show = crypto_nivaead_show,
+#endif
+};
+EXPORT_SYMBOL_GPL(crypto_nivaead_type);
+
+static int crypto_grab_nivaead(struct crypto_aead_spawn *spawn,
+ const char *name, u32 type, u32 mask)
+{
+ struct crypto_alg *alg;
+ int err;
+
+ type &= ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV);
+ type |= CRYPTO_ALG_TYPE_AEAD;
+ mask |= CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV;
+
+ alg = crypto_alg_mod_lookup(name, type, mask);
+ if (IS_ERR(alg))
+ return PTR_ERR(alg);
+
+ err = crypto_init_spawn(&spawn->base, alg, spawn->base.inst, mask);
+ crypto_mod_put(alg);
+ return err;
+}
+
+struct crypto_instance *aead_geniv_alloc(struct crypto_template *tmpl,
+ struct rtattr **tb, u32 type,
+ u32 mask)
+{
+ const char *name;
+ struct crypto_aead_spawn *spawn;
+ struct crypto_attr_type *algt;
+ struct crypto_instance *inst;
+ struct crypto_alg *alg;
+ int err;
+
+ algt = crypto_get_attr_type(tb);
+ err = PTR_ERR(algt);
+ if (IS_ERR(algt))
+ return ERR_PTR(err);
+
+ if ((algt->type ^ (CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_GENIV)) &
+ algt->mask)
+ return ERR_PTR(-EINVAL);
+
+ name = crypto_attr_alg_name(tb[1]);
+ err = PTR_ERR(name);
+ if (IS_ERR(name))
+ return ERR_PTR(err);
+
+ inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
+ if (!inst)
+ return ERR_PTR(-ENOMEM);
+
+ spawn = crypto_instance_ctx(inst);
+
+ /* Ignore async algorithms if necessary. */
+ mask |= crypto_requires_sync(algt->type, algt->mask);
+
+ crypto_set_aead_spawn(spawn, inst);
+ err = crypto_grab_nivaead(spawn, name, type, mask);
+ if (err)
+ goto err_free_inst;
+
+ alg = crypto_aead_spawn_alg(spawn);
+
+ err = -EINVAL;
+ if (!alg->cra_aead.ivsize)
+ 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 (strcmp(tmpl->name, alg->cra_aead.geniv))
+ goto err_drop_alg;
+
+ memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
+ memcpy(inst->alg.cra_driver_name, alg->cra_driver_name,
+ CRYPTO_MAX_ALG_NAME);
+ } else {
+ err = -ENAMETOOLONG;
+ if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME,
+ "%s(%s)", tmpl->name, alg->cra_name) >=
+ CRYPTO_MAX_ALG_NAME)
+ goto err_drop_alg;
+ if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
+ "%s(%s)", tmpl->name, alg->cra_driver_name) >=
+ CRYPTO_MAX_ALG_NAME)
+ goto err_drop_alg;
+ }
+
+ inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_GENIV;
+ inst->alg.cra_flags |= alg->cra_flags & CRYPTO_ALG_ASYNC;
+ inst->alg.cra_priority = alg->cra_priority;
+ inst->alg.cra_blocksize = alg->cra_blocksize;
+ inst->alg.cra_alignmask = alg->cra_alignmask;
+ inst->alg.cra_type = &crypto_aead_type;
+
+ inst->alg.cra_aead.ivsize = alg->cra_aead.ivsize;
+ inst->alg.cra_aead.maxauthsize = alg->cra_aead.maxauthsize;
+ inst->alg.cra_aead.geniv = alg->cra_aead.geniv;
+
+ inst->alg.cra_aead.setkey = alg->cra_aead.setkey;
+ inst->alg.cra_aead.setauthsize = alg->cra_aead.setauthsize;
+ inst->alg.cra_aead.encrypt = alg->cra_aead.encrypt;
+ inst->alg.cra_aead.decrypt = alg->cra_aead.decrypt;
+
+out:
+ return inst;
+
+err_drop_alg:
+ crypto_drop_aead(spawn);
+err_free_inst:
+ kfree(inst);
+ inst = ERR_PTR(err);
+ goto out;
+}
+EXPORT_SYMBOL_GPL(aead_geniv_alloc);
+
+void aead_geniv_free(struct crypto_instance *inst)
+{
+ crypto_drop_aead(crypto_instance_ctx(inst));
+ kfree(inst);
+}
+EXPORT_SYMBOL_GPL(aead_geniv_free);
+
+int aead_geniv_init(struct crypto_tfm *tfm)
+{
+ struct crypto_instance *inst = (void *)tfm->__crt_alg;
+ struct crypto_aead *aead;
+
+ aead = crypto_spawn_aead(crypto_instance_ctx(inst));
+ if (IS_ERR(aead))
+ return PTR_ERR(aead);
+
+ tfm->crt_aead.base = aead;
+ tfm->crt_aead.reqsize += crypto_aead_reqsize(aead);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(aead_geniv_init);
+
+void aead_geniv_exit(struct crypto_tfm *tfm)
+{
+ crypto_free_aead(tfm->crt_aead.base);
+}
+EXPORT_SYMBOL_GPL(aead_geniv_exit);
+
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Authenticated Encryption with Associated Data (AEAD)");
diff --git a/include/crypto/internal/aead.h b/include/crypto/internal/aead.h
new file mode 100644
index 00000000000..eb4eee7a780
--- /dev/null
+++ b/include/crypto/internal/aead.h
@@ -0,0 +1,77 @@
+/*
+ * AEAD: Authenticated Encryption with Associated Data
+ *
+ * Copyright (c) 2007 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
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+
+#ifndef _CRYPTO_INTERNAL_AEAD_H
+#define _CRYPTO_INTERNAL_AEAD_H
+
+#include <crypto/aead.h>
+#include <crypto/algapi.h>
+#include <linux/types.h>
+
+struct rtattr;
+
+struct crypto_aead_spawn {
+ struct crypto_spawn base;
+};
+
+extern const struct crypto_type crypto_nivaead_type;
+
+static inline void crypto_set_aead_spawn(
+ struct crypto_aead_spawn *spawn, struct crypto_instance *inst)
+{
+ crypto_set_spawn(&spawn->base, inst);
+}
+
+static inline void crypto_drop_aead(struct crypto_aead_spawn *spawn)
+{
+ crypto_drop_spawn(&spawn->base);
+}
+
+static inline struct crypto_alg *crypto_aead_spawn_alg(
+ struct crypto_aead_spawn *spawn)
+{
+ return spawn->base.alg;
+}
+
+static inline struct crypto_aead *crypto_spawn_aead(
+ struct crypto_aead_spawn *spawn)
+{
+ return __crypto_aead_cast(
+ crypto_spawn_tfm(&spawn->base, CRYPTO_ALG_TYPE_AEAD,
+ CRYPTO_ALG_TYPE_MASK));
+}
+
+struct crypto_instance *aead_geniv_alloc(struct crypto_template *tmpl,
+ struct rtattr **tb, u32 type,
+ u32 mask);
+void aead_geniv_free(struct crypto_instance *inst);
+int aead_geniv_init(struct crypto_tfm *tfm);
+void aead_geniv_exit(struct crypto_tfm *tfm);
+
+static inline struct crypto_aead *aead_geniv_base(struct crypto_aead *geniv)
+{
+ return crypto_aead_crt(geniv)->base;
+}
+
+static inline void *aead_givcrypt_reqctx(struct aead_givcrypt_request *req)
+{
+ return aead_request_ctx(&req->areq);
+}
+
+static inline void aead_givcrypt_complete(struct aead_givcrypt_request *req,
+ int err)
+{
+ aead_request_complete(&req->areq, err);
+}
+
+#endif /* _CRYPTO_INTERNAL_AEAD_H */
+
diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index 7524928bff9..639385a9672 100644
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -206,6 +206,8 @@ struct aead_alg {
int (*givencrypt)(struct aead_givcrypt_request *req);
int (*givdecrypt)(struct aead_givcrypt_request *req);
+ const char *geniv;
+
unsigned int ivsize;
unsigned int maxauthsize;
};
@@ -353,6 +355,9 @@ struct aead_tfm {
int (*decrypt)(struct aead_request *req);
int (*givencrypt)(struct aead_givcrypt_request *req);
int (*givdecrypt)(struct aead_givcrypt_request *req);
+
+ struct crypto_aead *base;
+
unsigned int ivsize;
unsigned int authsize;
unsigned int reqsize;
@@ -781,7 +786,9 @@ static inline void crypto_aead_clear_flags(struct crypto_aead *tfm, u32 flags)
static inline int crypto_aead_setkey(struct crypto_aead *tfm, const u8 *key,
unsigned int keylen)
{
- return crypto_aead_crt(tfm)->setkey(tfm, key, keylen);
+ struct aead_tfm *crt = crypto_aead_crt(tfm);
+
+ return crt->setkey(crt->base, key, keylen);
}
int crypto_aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize);
@@ -809,7 +816,7 @@ static inline unsigned int crypto_aead_reqsize(struct crypto_aead *tfm)
static inline void aead_request_set_tfm(struct aead_request *req,
struct crypto_aead *tfm)
{
- req->base.tfm = crypto_aead_tfm(tfm);
+ req->base.tfm = crypto_aead_tfm(crypto_aead_crt(tfm)->base);
}
static inline struct aead_request *aead_request_alloc(struct crypto_aead *tfm,
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-21 13:07:59 +0000