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-rw-r--r--crypto/ablkcipher.c158
-rw-r--r--crypto/api.c19
-rw-r--r--crypto/blkcipher.c4
-rw-r--r--crypto/internal.h2
4 files changed, 177 insertions, 6 deletions
diff --git a/crypto/ablkcipher.c b/crypto/ablkcipher.c
index 092d9659b861..d1df528c8fa3 100644
--- a/crypto/ablkcipher.c
+++ b/crypto/ablkcipher.c
@@ -18,6 +18,8 @@
#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>
@@ -68,6 +70,16 @@ static unsigned int crypto_ablkcipher_ctxsize(struct crypto_alg *alg, u32 type,
return alg->cra_ctxsize;
}
+int skcipher_null_givencrypt(struct skcipher_givcrypt_request *req)
+{
+ return crypto_ablkcipher_encrypt(&req->creq);
+}
+
+int skcipher_null_givdecrypt(struct skcipher_givcrypt_request *req)
+{
+ return crypto_ablkcipher_decrypt(&req->creq);
+}
+
static int crypto_init_ablkcipher_ops(struct crypto_tfm *tfm, u32 type,
u32 mask)
{
@@ -80,6 +92,10 @@ static int crypto_init_ablkcipher_ops(struct crypto_tfm *tfm, u32 type,
crt->setkey = setkey;
crt->encrypt = alg->encrypt;
crt->decrypt = alg->decrypt;
+ if (!alg->ivsize) {
+ crt->givencrypt = skcipher_null_givencrypt;
+ crt->givdecrypt = skcipher_null_givdecrypt;
+ }
crt->base = __crypto_ablkcipher_cast(tfm);
crt->ivsize = alg->ivsize;
@@ -163,6 +179,108 @@ const char *crypto_default_geniv(const struct crypto_alg *alg)
return alg->cra_flags & CRYPTO_ALG_ASYNC ? "eseqiv" : "chainiv";
}
+static int crypto_givcipher_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_GIVCIPHER,
+ CRYPTO_ALG_TYPE_MASK);
+ 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;
+
+ if ((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) ==
+ CRYPTO_ALG_TYPE_BLKCIPHER)
+ geniv = alg->cra_blkcipher.geniv;
+ else
+ geniv = alg->cra_ablkcipher.geniv;
+
+ if (!geniv)
+ geniv = crypto_default_geniv(alg);
+
+ tmpl = crypto_lookup_template(geniv);
+ err = -ENOENT;
+ if (!tmpl)
+ goto kill_larval;
+
+ inst = tmpl->alloc(tb);
+ err = PTR_ERR(inst);
+ if (IS_ERR(inst))
+ goto put_tmpl;
+
+ if ((err = crypto_register_instance(tmpl, inst))) {
+ tmpl->free(inst);
+ goto put_tmpl;
+ }
+
+ /* Redo the lookup to use the instance we just registered. */
+ err = -EAGAIN;
+
+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;
+}
+
+static struct crypto_alg *crypto_lookup_skcipher(const char *name, u32 type,
+ u32 mask)
+{
+ struct crypto_alg *alg;
+
+ alg = crypto_alg_mod_lookup(name, type, mask);
+ if (IS_ERR(alg))
+ return alg;
+
+ if ((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) ==
+ CRYPTO_ALG_TYPE_GIVCIPHER)
+ return alg;
+
+ if (!((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) ==
+ CRYPTO_ALG_TYPE_BLKCIPHER ? alg->cra_blkcipher.ivsize :
+ alg->cra_ablkcipher.ivsize))
+ return alg;
+
+ return ERR_PTR(crypto_givcipher_default(alg, type, mask));
+}
+
int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn, const char *name,
u32 type, u32 mask)
{
@@ -172,7 +290,7 @@ int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn, const char *name,
type = crypto_skcipher_type(type);
mask = crypto_skcipher_mask(mask);
- alg = crypto_alg_mod_lookup(name, type, mask);
+ alg = crypto_lookup_skcipher(name, type, mask);
if (IS_ERR(alg))
return PTR_ERR(alg);
@@ -182,5 +300,43 @@ int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn, const char *name,
}
EXPORT_SYMBOL_GPL(crypto_grab_skcipher);
+struct crypto_ablkcipher *crypto_alloc_ablkcipher(const char *alg_name,
+ u32 type, u32 mask)
+{
+ struct crypto_tfm *tfm;
+ int err;
+
+ type = crypto_skcipher_type(type);
+ mask = crypto_skcipher_mask(mask);
+
+ for (;;) {
+ struct crypto_alg *alg;
+
+ alg = crypto_lookup_skcipher(alg_name, type, mask);
+ if (IS_ERR(alg)) {
+ err = PTR_ERR(alg);
+ goto err;
+ }
+
+ tfm = __crypto_alloc_tfm(alg, type, mask);
+ if (!IS_ERR(tfm))
+ return __crypto_ablkcipher_cast(tfm);
+
+ crypto_mod_put(alg);
+ err = PTR_ERR(tfm);
+
+err:
+ if (err != -EAGAIN)
+ break;
+ if (signal_pending(current)) {
+ err = -EINTR;
+ break;
+ }
+ }
+
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL_GPL(crypto_alloc_ablkcipher);
+
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Asynchronous block chaining cipher type");
diff --git a/crypto/api.c b/crypto/api.c
index 1f5c72477356..a2496d1bc6d4 100644
--- a/crypto/api.c
+++ b/crypto/api.c
@@ -137,7 +137,7 @@ static struct crypto_alg *crypto_larval_alloc(const char *name, u32 type,
return alg;
}
-static void crypto_larval_kill(struct crypto_alg *alg)
+void crypto_larval_kill(struct crypto_alg *alg)
{
struct crypto_larval *larval = (void *)alg;
@@ -147,6 +147,7 @@ static void crypto_larval_kill(struct crypto_alg *alg)
complete_all(&larval->completion);
crypto_alg_put(alg);
}
+EXPORT_SYMBOL_GPL(crypto_larval_kill);
static struct crypto_alg *crypto_larval_wait(struct crypto_alg *alg)
{
@@ -176,11 +177,9 @@ static struct crypto_alg *crypto_alg_lookup(const char *name, u32 type,
return alg;
}
-struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask)
+struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask)
{
struct crypto_alg *alg;
- struct crypto_alg *larval;
- int ok;
if (!name)
return ERR_PTR(-ENOENT);
@@ -193,7 +192,17 @@ struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask)
if (alg)
return crypto_is_larval(alg) ? crypto_larval_wait(alg) : alg;
- larval = crypto_larval_alloc(name, type, mask);
+ return crypto_larval_alloc(name, type, mask);
+}
+EXPORT_SYMBOL_GPL(crypto_larval_lookup);
+
+struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask)
+{
+ struct crypto_alg *alg;
+ struct crypto_alg *larval;
+ int ok;
+
+ larval = crypto_larval_lookup(name, type, mask);
if (IS_ERR(larval) || !crypto_is_larval(larval))
return larval;
diff --git a/crypto/blkcipher.c b/crypto/blkcipher.c
index ca6ef065cded..4a7e65c4df4d 100644
--- a/crypto/blkcipher.c
+++ b/crypto/blkcipher.c
@@ -450,6 +450,10 @@ static int crypto_init_blkcipher_ops_async(struct crypto_tfm *tfm)
crt->setkey = async_setkey;
crt->encrypt = async_encrypt;
crt->decrypt = async_decrypt;
+ if (!alg->ivsize) {
+ crt->givencrypt = skcipher_null_givencrypt;
+ crt->givdecrypt = skcipher_null_givdecrypt;
+ }
crt->base = __crypto_ablkcipher_cast(tfm);
crt->ivsize = alg->ivsize;
diff --git a/crypto/internal.h b/crypto/internal.h
index cb13952f82bf..32f4c2145603 100644
--- a/crypto/internal.h
+++ b/crypto/internal.h
@@ -93,6 +93,8 @@ void crypto_exit_digest_ops(struct crypto_tfm *tfm);
void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
void crypto_exit_compress_ops(struct crypto_tfm *tfm);
+void crypto_larval_kill(struct crypto_alg *alg);
+struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask);
void crypto_larval_error(const char *name, u32 type, u32 mask);
void crypto_shoot_alg(struct crypto_alg *alg);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-19 04:10:18 +0000