summaryrefslogtreecommitdiffstats
path: root/arch/sparc/crypto/aes_glue.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sparc/crypto/aes_glue.c')
-rw-r--r--arch/sparc/crypto/aes_glue.c475
1 files changed, 475 insertions, 0 deletions
diff --git a/arch/sparc/crypto/aes_glue.c b/arch/sparc/crypto/aes_glue.c
new file mode 100644
index 0000000000..e3d2138ff9
--- /dev/null
+++ b/arch/sparc/crypto/aes_glue.c
@@ -0,0 +1,475 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Glue code for AES encryption optimized for sparc64 crypto opcodes.
+ *
+ * This is based largely upon arch/x86/crypto/aesni-intel_glue.c
+ *
+ * Copyright (C) 2008, Intel Corp.
+ * Author: Huang Ying <ying.huang@intel.com>
+ *
+ * Added RFC4106 AES-GCM support for 128-bit keys under the AEAD
+ * interface for 64-bit kernels.
+ * Authors: Adrian Hoban <adrian.hoban@intel.com>
+ * Gabriele Paoloni <gabriele.paoloni@intel.com>
+ * Tadeusz Struk (tadeusz.struk@intel.com)
+ * Aidan O'Mahony (aidan.o.mahony@intel.com)
+ * Copyright (c) 2010, Intel Corporation.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/crypto.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/types.h>
+#include <crypto/algapi.h>
+#include <crypto/aes.h>
+#include <crypto/internal/skcipher.h>
+
+#include <asm/fpumacro.h>
+#include <asm/pstate.h>
+#include <asm/elf.h>
+
+#include "opcodes.h"
+
+struct aes_ops {
+ void (*encrypt)(const u64 *key, const u32 *input, u32 *output);
+ void (*decrypt)(const u64 *key, const u32 *input, u32 *output);
+ void (*load_encrypt_keys)(const u64 *key);
+ void (*load_decrypt_keys)(const u64 *key);
+ void (*ecb_encrypt)(const u64 *key, const u64 *input, u64 *output,
+ unsigned int len);
+ void (*ecb_decrypt)(const u64 *key, const u64 *input, u64 *output,
+ unsigned int len);
+ void (*cbc_encrypt)(const u64 *key, const u64 *input, u64 *output,
+ unsigned int len, u64 *iv);
+ void (*cbc_decrypt)(const u64 *key, const u64 *input, u64 *output,
+ unsigned int len, u64 *iv);
+ void (*ctr_crypt)(const u64 *key, const u64 *input, u64 *output,
+ unsigned int len, u64 *iv);
+};
+
+struct crypto_sparc64_aes_ctx {
+ struct aes_ops *ops;
+ u64 key[AES_MAX_KEYLENGTH / sizeof(u64)];
+ u32 key_length;
+ u32 expanded_key_length;
+};
+
+extern void aes_sparc64_encrypt_128(const u64 *key, const u32 *input,
+ u32 *output);
+extern void aes_sparc64_encrypt_192(const u64 *key, const u32 *input,
+ u32 *output);
+extern void aes_sparc64_encrypt_256(const u64 *key, const u32 *input,
+ u32 *output);
+
+extern void aes_sparc64_decrypt_128(const u64 *key, const u32 *input,
+ u32 *output);
+extern void aes_sparc64_decrypt_192(const u64 *key, const u32 *input,
+ u32 *output);
+extern void aes_sparc64_decrypt_256(const u64 *key, const u32 *input,
+ u32 *output);
+
+extern void aes_sparc64_load_encrypt_keys_128(const u64 *key);
+extern void aes_sparc64_load_encrypt_keys_192(const u64 *key);
+extern void aes_sparc64_load_encrypt_keys_256(const u64 *key);
+
+extern void aes_sparc64_load_decrypt_keys_128(const u64 *key);
+extern void aes_sparc64_load_decrypt_keys_192(const u64 *key);
+extern void aes_sparc64_load_decrypt_keys_256(const u64 *key);
+
+extern void aes_sparc64_ecb_encrypt_128(const u64 *key, const u64 *input,
+ u64 *output, unsigned int len);
+extern void aes_sparc64_ecb_encrypt_192(const u64 *key, const u64 *input,
+ u64 *output, unsigned int len);
+extern void aes_sparc64_ecb_encrypt_256(const u64 *key, const u64 *input,
+ u64 *output, unsigned int len);
+
+extern void aes_sparc64_ecb_decrypt_128(const u64 *key, const u64 *input,
+ u64 *output, unsigned int len);
+extern void aes_sparc64_ecb_decrypt_192(const u64 *key, const u64 *input,
+ u64 *output, unsigned int len);
+extern void aes_sparc64_ecb_decrypt_256(const u64 *key, const u64 *input,
+ u64 *output, unsigned int len);
+
+extern void aes_sparc64_cbc_encrypt_128(const u64 *key, const u64 *input,
+ u64 *output, unsigned int len,
+ u64 *iv);
+
+extern void aes_sparc64_cbc_encrypt_192(const u64 *key, const u64 *input,
+ u64 *output, unsigned int len,
+ u64 *iv);
+
+extern void aes_sparc64_cbc_encrypt_256(const u64 *key, const u64 *input,
+ u64 *output, unsigned int len,
+ u64 *iv);
+
+extern void aes_sparc64_cbc_decrypt_128(const u64 *key, const u64 *input,
+ u64 *output, unsigned int len,
+ u64 *iv);
+
+extern void aes_sparc64_cbc_decrypt_192(const u64 *key, const u64 *input,
+ u64 *output, unsigned int len,
+ u64 *iv);
+
+extern void aes_sparc64_cbc_decrypt_256(const u64 *key, const u64 *input,
+ u64 *output, unsigned int len,
+ u64 *iv);
+
+extern void aes_sparc64_ctr_crypt_128(const u64 *key, const u64 *input,
+ u64 *output, unsigned int len,
+ u64 *iv);
+extern void aes_sparc64_ctr_crypt_192(const u64 *key, const u64 *input,
+ u64 *output, unsigned int len,
+ u64 *iv);
+extern void aes_sparc64_ctr_crypt_256(const u64 *key, const u64 *input,
+ u64 *output, unsigned int len,
+ u64 *iv);
+
+static struct aes_ops aes128_ops = {
+ .encrypt = aes_sparc64_encrypt_128,
+ .decrypt = aes_sparc64_decrypt_128,
+ .load_encrypt_keys = aes_sparc64_load_encrypt_keys_128,
+ .load_decrypt_keys = aes_sparc64_load_decrypt_keys_128,
+ .ecb_encrypt = aes_sparc64_ecb_encrypt_128,
+ .ecb_decrypt = aes_sparc64_ecb_decrypt_128,
+ .cbc_encrypt = aes_sparc64_cbc_encrypt_128,
+ .cbc_decrypt = aes_sparc64_cbc_decrypt_128,
+ .ctr_crypt = aes_sparc64_ctr_crypt_128,
+};
+
+static struct aes_ops aes192_ops = {
+ .encrypt = aes_sparc64_encrypt_192,
+ .decrypt = aes_sparc64_decrypt_192,
+ .load_encrypt_keys = aes_sparc64_load_encrypt_keys_192,
+ .load_decrypt_keys = aes_sparc64_load_decrypt_keys_192,
+ .ecb_encrypt = aes_sparc64_ecb_encrypt_192,
+ .ecb_decrypt = aes_sparc64_ecb_decrypt_192,
+ .cbc_encrypt = aes_sparc64_cbc_encrypt_192,
+ .cbc_decrypt = aes_sparc64_cbc_decrypt_192,
+ .ctr_crypt = aes_sparc64_ctr_crypt_192,
+};
+
+static struct aes_ops aes256_ops = {
+ .encrypt = aes_sparc64_encrypt_256,
+ .decrypt = aes_sparc64_decrypt_256,
+ .load_encrypt_keys = aes_sparc64_load_encrypt_keys_256,
+ .load_decrypt_keys = aes_sparc64_load_decrypt_keys_256,
+ .ecb_encrypt = aes_sparc64_ecb_encrypt_256,
+ .ecb_decrypt = aes_sparc64_ecb_decrypt_256,
+ .cbc_encrypt = aes_sparc64_cbc_encrypt_256,
+ .cbc_decrypt = aes_sparc64_cbc_decrypt_256,
+ .ctr_crypt = aes_sparc64_ctr_crypt_256,
+};
+
+extern void aes_sparc64_key_expand(const u32 *in_key, u64 *output_key,
+ unsigned int key_len);
+
+static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
+ unsigned int key_len)
+{
+ struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ switch (key_len) {
+ case AES_KEYSIZE_128:
+ ctx->expanded_key_length = 0xb0;
+ ctx->ops = &aes128_ops;
+ break;
+
+ case AES_KEYSIZE_192:
+ ctx->expanded_key_length = 0xd0;
+ ctx->ops = &aes192_ops;
+ break;
+
+ case AES_KEYSIZE_256:
+ ctx->expanded_key_length = 0xf0;
+ ctx->ops = &aes256_ops;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ aes_sparc64_key_expand((const u32 *)in_key, &ctx->key[0], key_len);
+ ctx->key_length = key_len;
+
+ return 0;
+}
+
+static int aes_set_key_skcipher(struct crypto_skcipher *tfm, const u8 *in_key,
+ unsigned int key_len)
+{
+ return aes_set_key(crypto_skcipher_tfm(tfm), in_key, key_len);
+}
+
+static void crypto_aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+ struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ ctx->ops->encrypt(&ctx->key[0], (const u32 *) src, (u32 *) dst);
+}
+
+static void crypto_aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+ struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ ctx->ops->decrypt(&ctx->key[0], (const u32 *) src, (u32 *) dst);
+}
+
+static int ecb_encrypt(struct skcipher_request *req)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ const struct crypto_sparc64_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
+ struct skcipher_walk walk;
+ unsigned int nbytes;
+ int err;
+
+ err = skcipher_walk_virt(&walk, req, true);
+ if (err)
+ return err;
+
+ ctx->ops->load_encrypt_keys(&ctx->key[0]);
+ while ((nbytes = walk.nbytes) != 0) {
+ ctx->ops->ecb_encrypt(&ctx->key[0], walk.src.virt.addr,
+ walk.dst.virt.addr,
+ round_down(nbytes, AES_BLOCK_SIZE));
+ err = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
+ }
+ fprs_write(0);
+ return err;
+}
+
+static int ecb_decrypt(struct skcipher_request *req)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ const struct crypto_sparc64_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
+ const u64 *key_end;
+ struct skcipher_walk walk;
+ unsigned int nbytes;
+ int err;
+
+ err = skcipher_walk_virt(&walk, req, true);
+ if (err)
+ return err;
+
+ ctx->ops->load_decrypt_keys(&ctx->key[0]);
+ key_end = &ctx->key[ctx->expanded_key_length / sizeof(u64)];
+ while ((nbytes = walk.nbytes) != 0) {
+ ctx->ops->ecb_decrypt(key_end, walk.src.virt.addr,
+ walk.dst.virt.addr,
+ round_down(nbytes, AES_BLOCK_SIZE));
+ err = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
+ }
+ fprs_write(0);
+
+ return err;
+}
+
+static int cbc_encrypt(struct skcipher_request *req)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ const struct crypto_sparc64_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
+ struct skcipher_walk walk;
+ unsigned int nbytes;
+ int err;
+
+ err = skcipher_walk_virt(&walk, req, true);
+ if (err)
+ return err;
+
+ ctx->ops->load_encrypt_keys(&ctx->key[0]);
+ while ((nbytes = walk.nbytes) != 0) {
+ ctx->ops->cbc_encrypt(&ctx->key[0], walk.src.virt.addr,
+ walk.dst.virt.addr,
+ round_down(nbytes, AES_BLOCK_SIZE),
+ walk.iv);
+ err = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
+ }
+ fprs_write(0);
+ return err;
+}
+
+static int cbc_decrypt(struct skcipher_request *req)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ const struct crypto_sparc64_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
+ const u64 *key_end;
+ struct skcipher_walk walk;
+ unsigned int nbytes;
+ int err;
+
+ err = skcipher_walk_virt(&walk, req, true);
+ if (err)
+ return err;
+
+ ctx->ops->load_decrypt_keys(&ctx->key[0]);
+ key_end = &ctx->key[ctx->expanded_key_length / sizeof(u64)];
+ while ((nbytes = walk.nbytes) != 0) {
+ ctx->ops->cbc_decrypt(key_end, walk.src.virt.addr,
+ walk.dst.virt.addr,
+ round_down(nbytes, AES_BLOCK_SIZE),
+ walk.iv);
+ err = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
+ }
+ fprs_write(0);
+
+ return err;
+}
+
+static void ctr_crypt_final(const struct crypto_sparc64_aes_ctx *ctx,
+ struct skcipher_walk *walk)
+{
+ u8 *ctrblk = walk->iv;
+ u64 keystream[AES_BLOCK_SIZE / sizeof(u64)];
+ u8 *src = walk->src.virt.addr;
+ u8 *dst = walk->dst.virt.addr;
+ unsigned int nbytes = walk->nbytes;
+
+ ctx->ops->ecb_encrypt(&ctx->key[0], (const u64 *)ctrblk,
+ keystream, AES_BLOCK_SIZE);
+ crypto_xor_cpy(dst, (u8 *) keystream, src, nbytes);
+ crypto_inc(ctrblk, AES_BLOCK_SIZE);
+}
+
+static int ctr_crypt(struct skcipher_request *req)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ const struct crypto_sparc64_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
+ struct skcipher_walk walk;
+ unsigned int nbytes;
+ int err;
+
+ err = skcipher_walk_virt(&walk, req, true);
+ if (err)
+ return err;
+
+ ctx->ops->load_encrypt_keys(&ctx->key[0]);
+ while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {
+ ctx->ops->ctr_crypt(&ctx->key[0], walk.src.virt.addr,
+ walk.dst.virt.addr,
+ round_down(nbytes, AES_BLOCK_SIZE),
+ walk.iv);
+ err = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
+ }
+ if (walk.nbytes) {
+ ctr_crypt_final(ctx, &walk);
+ err = skcipher_walk_done(&walk, 0);
+ }
+ fprs_write(0);
+ return err;
+}
+
+static struct crypto_alg cipher_alg = {
+ .cra_name = "aes",
+ .cra_driver_name = "aes-sparc64",
+ .cra_priority = SPARC_CR_OPCODE_PRIORITY,
+ .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
+ .cra_alignmask = 3,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .cipher = {
+ .cia_min_keysize = AES_MIN_KEY_SIZE,
+ .cia_max_keysize = AES_MAX_KEY_SIZE,
+ .cia_setkey = aes_set_key,
+ .cia_encrypt = crypto_aes_encrypt,
+ .cia_decrypt = crypto_aes_decrypt
+ }
+ }
+};
+
+static struct skcipher_alg skcipher_algs[] = {
+ {
+ .base.cra_name = "ecb(aes)",
+ .base.cra_driver_name = "ecb-aes-sparc64",
+ .base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
+ .base.cra_blocksize = AES_BLOCK_SIZE,
+ .base.cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
+ .base.cra_alignmask = 7,
+ .base.cra_module = THIS_MODULE,
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .setkey = aes_set_key_skcipher,
+ .encrypt = ecb_encrypt,
+ .decrypt = ecb_decrypt,
+ }, {
+ .base.cra_name = "cbc(aes)",
+ .base.cra_driver_name = "cbc-aes-sparc64",
+ .base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
+ .base.cra_blocksize = AES_BLOCK_SIZE,
+ .base.cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
+ .base.cra_alignmask = 7,
+ .base.cra_module = THIS_MODULE,
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .setkey = aes_set_key_skcipher,
+ .encrypt = cbc_encrypt,
+ .decrypt = cbc_decrypt,
+ }, {
+ .base.cra_name = "ctr(aes)",
+ .base.cra_driver_name = "ctr-aes-sparc64",
+ .base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
+ .base.cra_blocksize = 1,
+ .base.cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
+ .base.cra_alignmask = 7,
+ .base.cra_module = THIS_MODULE,
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .setkey = aes_set_key_skcipher,
+ .encrypt = ctr_crypt,
+ .decrypt = ctr_crypt,
+ .chunksize = AES_BLOCK_SIZE,
+ }
+};
+
+static bool __init sparc64_has_aes_opcode(void)
+{
+ unsigned long cfr;
+
+ if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
+ return false;
+
+ __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
+ if (!(cfr & CFR_AES))
+ return false;
+
+ return true;
+}
+
+static int __init aes_sparc64_mod_init(void)
+{
+ int err;
+
+ if (!sparc64_has_aes_opcode()) {
+ pr_info("sparc64 aes opcodes not available.\n");
+ return -ENODEV;
+ }
+ pr_info("Using sparc64 aes opcodes optimized AES implementation\n");
+ err = crypto_register_alg(&cipher_alg);
+ if (err)
+ return err;
+ err = crypto_register_skciphers(skcipher_algs,
+ ARRAY_SIZE(skcipher_algs));
+ if (err)
+ crypto_unregister_alg(&cipher_alg);
+ return err;
+}
+
+static void __exit aes_sparc64_mod_fini(void)
+{
+ crypto_unregister_alg(&cipher_alg);
+ crypto_unregister_skciphers(skcipher_algs, ARRAY_SIZE(skcipher_algs));
+}
+
+module_init(aes_sparc64_mod_init);
+module_exit(aes_sparc64_mod_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, sparc64 aes opcode accelerated");
+
+MODULE_ALIAS_CRYPTO("aes");
+
+#include "crop_devid.c"
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 16:38:21 +0000