*
*/
-#include <crypto/algapi.h>
-#include <linux/errno.h>
+#include <crypto/internal/skcipher.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_ablkcipher *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ struct ablkcipher_alg *cipher = crypto_ablkcipher_alg(tfm);
+ unsigned long alignmask = crypto_ablkcipher_alignmask(tfm);
+ int ret;
+ u8 *buffer, *alignbuffer;
+ unsigned long absize;
+
+ absize = keylen + alignmask;
+ buffer = kmalloc(absize, GFP_ATOMIC);
+ if (!buffer)
+ return -ENOMEM;
+
+ alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
+ memcpy(alignbuffer, key, keylen);
+ ret = cipher->setkey(tfm, alignbuffer, keylen);
+ memset(alignbuffer, 0, keylen);
+ kfree(buffer);
+ return ret;
+}
+
static int setkey(struct crypto_ablkcipher *tfm, const u8 *key,
unsigned int keylen)
{
struct ablkcipher_alg *cipher = crypto_ablkcipher_alg(tfm);
+ unsigned long alignmask = crypto_ablkcipher_alignmask(tfm);
if (keylen < cipher->min_keysize || keylen > cipher->max_keysize) {
crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
return -EINVAL;
}
+ if ((unsigned long)key & alignmask)
+ return setkey_unaligned(tfm, key, keylen);
+
return cipher->setkey(tfm, key, keylen);
}
seq_printf(m, "min keysize : %u\n", ablkcipher->min_keysize);
seq_printf(m, "max keysize : %u\n", ablkcipher->max_keysize);
seq_printf(m, "ivsize : %u\n", ablkcipher->ivsize);
- seq_printf(m, "qlen : %u\n", ablkcipher->queue->qlen);
- seq_printf(m, "max qlen : %u\n", ablkcipher->queue->max_qlen);
}
const struct crypto_type crypto_ablkcipher_type = {
};
EXPORT_SYMBOL_GPL(crypto_ablkcipher_type);
+static int no_givdecrypt(struct skcipher_givcrypt_request *req)
+{
+ return -ENOSYS;
+}
+
+static int crypto_init_givcipher_ops(struct crypto_tfm *tfm, u32 type,
+ u32 mask)
+{
+ struct ablkcipher_alg *alg = &tfm->__crt_alg->cra_ablkcipher;
+ struct ablkcipher_tfm *crt = &tfm->crt_ablkcipher;
+
+ if (alg->ivsize > PAGE_SIZE / 8)
+ return -EINVAL;
+
+ crt->setkey = setkey;
+ crt->encrypt = alg->encrypt;
+ crt->decrypt = alg->decrypt;
+ crt->givencrypt = alg->givencrypt;
+ crt->givdecrypt = alg->givdecrypt ?: no_givdecrypt;
+ crt->ivsize = alg->ivsize;
+
+ return 0;
+}
+
+static void crypto_givcipher_show(struct seq_file *m, struct crypto_alg *alg)
+ __attribute__ ((unused));
+static void crypto_givcipher_show(struct seq_file *m, struct crypto_alg *alg)
+{
+ struct ablkcipher_alg *ablkcipher = &alg->cra_ablkcipher;
+
+ seq_printf(m, "type : givcipher\n");
+ seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
+ seq_printf(m, "min keysize : %u\n", ablkcipher->min_keysize);
+ seq_printf(m, "max keysize : %u\n", ablkcipher->max_keysize);
+ seq_printf(m, "ivsize : %u\n", ablkcipher->ivsize);
+}
+
+const struct crypto_type crypto_givcipher_type = {
+ .ctxsize = crypto_ablkcipher_ctxsize,
+ .init = crypto_init_givcipher_ops,
+#ifdef CONFIG_PROC_FS
+ .show = crypto_givcipher_show,
+#endif
+};
+EXPORT_SYMBOL_GPL(crypto_givcipher_type);
+
+int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn, const char *name,
+ u32 type, u32 mask)
+{
+ struct crypto_alg *alg;
+ int err;
+
+ type = crypto_skcipher_type(type);
+ mask = crypto_skcipher_mask(mask);
+
+ 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;
+}
+EXPORT_SYMBOL_GPL(crypto_grab_skcipher);
+
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Asynchronous block chaining cipher type");