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-rw-r--r--arch/sparc/crypto/camellia_glue.c294
1 files changed, 294 insertions, 0 deletions
diff --git a/arch/sparc/crypto/camellia_glue.c b/arch/sparc/crypto/camellia_glue.c
new file mode 100644
index 0000000000..aaa9714378
--- /dev/null
+++ b/arch/sparc/crypto/camellia_glue.c
@@ -0,0 +1,294 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Glue code for CAMELLIA encryption optimized for sparc64 crypto opcodes.
+ *
+ * Copyright (C) 2012 David S. Miller <davem@davemloft.net>
+ */
+
+#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/internal/skcipher.h>
+
+#include <asm/fpumacro.h>
+#include <asm/pstate.h>
+#include <asm/elf.h>
+
+#include "opcodes.h"
+
+#define CAMELLIA_MIN_KEY_SIZE 16
+#define CAMELLIA_MAX_KEY_SIZE 32
+#define CAMELLIA_BLOCK_SIZE 16
+#define CAMELLIA_TABLE_BYTE_LEN 272
+
+struct camellia_sparc64_ctx {
+ u64 encrypt_key[CAMELLIA_TABLE_BYTE_LEN / sizeof(u64)];
+ u64 decrypt_key[CAMELLIA_TABLE_BYTE_LEN / sizeof(u64)];
+ int key_len;
+};
+
+extern void camellia_sparc64_key_expand(const u32 *in_key, u64 *encrypt_key,
+ unsigned int key_len, u64 *decrypt_key);
+
+static int camellia_set_key(struct crypto_tfm *tfm, const u8 *_in_key,
+ unsigned int key_len)
+{
+ struct camellia_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
+ const u32 *in_key = (const u32 *) _in_key;
+
+ if (key_len != 16 && key_len != 24 && key_len != 32)
+ return -EINVAL;
+
+ ctx->key_len = key_len;
+
+ camellia_sparc64_key_expand(in_key, &ctx->encrypt_key[0],
+ key_len, &ctx->decrypt_key[0]);
+ return 0;
+}
+
+static int camellia_set_key_skcipher(struct crypto_skcipher *tfm,
+ const u8 *in_key, unsigned int key_len)
+{
+ return camellia_set_key(crypto_skcipher_tfm(tfm), in_key, key_len);
+}
+
+extern void camellia_sparc64_crypt(const u64 *key, const u32 *input,
+ u32 *output, unsigned int key_len);
+
+static void camellia_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+ struct camellia_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ camellia_sparc64_crypt(&ctx->encrypt_key[0],
+ (const u32 *) src,
+ (u32 *) dst, ctx->key_len);
+}
+
+static void camellia_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+ struct camellia_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ camellia_sparc64_crypt(&ctx->decrypt_key[0],
+ (const u32 *) src,
+ (u32 *) dst, ctx->key_len);
+}
+
+extern void camellia_sparc64_load_keys(const u64 *key, unsigned int key_len);
+
+typedef void ecb_crypt_op(const u64 *input, u64 *output, unsigned int len,
+ const u64 *key);
+
+extern ecb_crypt_op camellia_sparc64_ecb_crypt_3_grand_rounds;
+extern ecb_crypt_op camellia_sparc64_ecb_crypt_4_grand_rounds;
+
+static int __ecb_crypt(struct skcipher_request *req, bool encrypt)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ const struct camellia_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
+ struct skcipher_walk walk;
+ ecb_crypt_op *op;
+ const u64 *key;
+ unsigned int nbytes;
+ int err;
+
+ op = camellia_sparc64_ecb_crypt_3_grand_rounds;
+ if (ctx->key_len != 16)
+ op = camellia_sparc64_ecb_crypt_4_grand_rounds;
+
+ err = skcipher_walk_virt(&walk, req, true);
+ if (err)
+ return err;
+
+ if (encrypt)
+ key = &ctx->encrypt_key[0];
+ else
+ key = &ctx->decrypt_key[0];
+ camellia_sparc64_load_keys(key, ctx->key_len);
+ while ((nbytes = walk.nbytes) != 0) {
+ op(walk.src.virt.addr, walk.dst.virt.addr,
+ round_down(nbytes, CAMELLIA_BLOCK_SIZE), key);
+ err = skcipher_walk_done(&walk, nbytes % CAMELLIA_BLOCK_SIZE);
+ }
+ fprs_write(0);
+ return err;
+}
+
+static int ecb_encrypt(struct skcipher_request *req)
+{
+ return __ecb_crypt(req, true);
+}
+
+static int ecb_decrypt(struct skcipher_request *req)
+{
+ return __ecb_crypt(req, false);
+}
+
+typedef void cbc_crypt_op(const u64 *input, u64 *output, unsigned int len,
+ const u64 *key, u64 *iv);
+
+extern cbc_crypt_op camellia_sparc64_cbc_encrypt_3_grand_rounds;
+extern cbc_crypt_op camellia_sparc64_cbc_encrypt_4_grand_rounds;
+extern cbc_crypt_op camellia_sparc64_cbc_decrypt_3_grand_rounds;
+extern cbc_crypt_op camellia_sparc64_cbc_decrypt_4_grand_rounds;
+
+static int cbc_encrypt(struct skcipher_request *req)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ const struct camellia_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
+ struct skcipher_walk walk;
+ cbc_crypt_op *op;
+ const u64 *key;
+ unsigned int nbytes;
+ int err;
+
+ op = camellia_sparc64_cbc_encrypt_3_grand_rounds;
+ if (ctx->key_len != 16)
+ op = camellia_sparc64_cbc_encrypt_4_grand_rounds;
+
+ err = skcipher_walk_virt(&walk, req, true);
+ if (err)
+ return err;
+
+ key = &ctx->encrypt_key[0];
+ camellia_sparc64_load_keys(key, ctx->key_len);
+ while ((nbytes = walk.nbytes) != 0) {
+ op(walk.src.virt.addr, walk.dst.virt.addr,
+ round_down(nbytes, CAMELLIA_BLOCK_SIZE), key, walk.iv);
+ err = skcipher_walk_done(&walk, nbytes % CAMELLIA_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 camellia_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
+ struct skcipher_walk walk;
+ cbc_crypt_op *op;
+ const u64 *key;
+ unsigned int nbytes;
+ int err;
+
+ op = camellia_sparc64_cbc_decrypt_3_grand_rounds;
+ if (ctx->key_len != 16)
+ op = camellia_sparc64_cbc_decrypt_4_grand_rounds;
+
+ err = skcipher_walk_virt(&walk, req, true);
+ if (err)
+ return err;
+
+ key = &ctx->decrypt_key[0];
+ camellia_sparc64_load_keys(key, ctx->key_len);
+ while ((nbytes = walk.nbytes) != 0) {
+ op(walk.src.virt.addr, walk.dst.virt.addr,
+ round_down(nbytes, CAMELLIA_BLOCK_SIZE), key, walk.iv);
+ err = skcipher_walk_done(&walk, nbytes % CAMELLIA_BLOCK_SIZE);
+ }
+ fprs_write(0);
+ return err;
+}
+
+static struct crypto_alg cipher_alg = {
+ .cra_name = "camellia",
+ .cra_driver_name = "camellia-sparc64",
+ .cra_priority = SPARC_CR_OPCODE_PRIORITY,
+ .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
+ .cra_blocksize = CAMELLIA_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct camellia_sparc64_ctx),
+ .cra_alignmask = 3,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .cipher = {
+ .cia_min_keysize = CAMELLIA_MIN_KEY_SIZE,
+ .cia_max_keysize = CAMELLIA_MAX_KEY_SIZE,
+ .cia_setkey = camellia_set_key,
+ .cia_encrypt = camellia_encrypt,
+ .cia_decrypt = camellia_decrypt
+ }
+ }
+};
+
+static struct skcipher_alg skcipher_algs[] = {
+ {
+ .base.cra_name = "ecb(camellia)",
+ .base.cra_driver_name = "ecb-camellia-sparc64",
+ .base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
+ .base.cra_blocksize = CAMELLIA_BLOCK_SIZE,
+ .base.cra_ctxsize = sizeof(struct camellia_sparc64_ctx),
+ .base.cra_alignmask = 7,
+ .base.cra_module = THIS_MODULE,
+ .min_keysize = CAMELLIA_MIN_KEY_SIZE,
+ .max_keysize = CAMELLIA_MAX_KEY_SIZE,
+ .setkey = camellia_set_key_skcipher,
+ .encrypt = ecb_encrypt,
+ .decrypt = ecb_decrypt,
+ }, {
+ .base.cra_name = "cbc(camellia)",
+ .base.cra_driver_name = "cbc-camellia-sparc64",
+ .base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
+ .base.cra_blocksize = CAMELLIA_BLOCK_SIZE,
+ .base.cra_ctxsize = sizeof(struct camellia_sparc64_ctx),
+ .base.cra_alignmask = 7,
+ .base.cra_module = THIS_MODULE,
+ .min_keysize = CAMELLIA_MIN_KEY_SIZE,
+ .max_keysize = CAMELLIA_MAX_KEY_SIZE,
+ .ivsize = CAMELLIA_BLOCK_SIZE,
+ .setkey = camellia_set_key_skcipher,
+ .encrypt = cbc_encrypt,
+ .decrypt = cbc_decrypt,
+ }
+};
+
+static bool __init sparc64_has_camellia_opcode(void)
+{
+ unsigned long cfr;
+
+ if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
+ return false;
+
+ __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
+ if (!(cfr & CFR_CAMELLIA))
+ return false;
+
+ return true;
+}
+
+static int __init camellia_sparc64_mod_init(void)
+{
+ int err;
+
+ if (!sparc64_has_camellia_opcode()) {
+ pr_info("sparc64 camellia opcodes not available.\n");
+ return -ENODEV;
+ }
+ pr_info("Using sparc64 camellia opcodes optimized CAMELLIA 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 camellia_sparc64_mod_fini(void)
+{
+ crypto_unregister_alg(&cipher_alg);
+ crypto_unregister_skciphers(skcipher_algs, ARRAY_SIZE(skcipher_algs));
+}
+
+module_init(camellia_sparc64_mod_init);
+module_exit(camellia_sparc64_mod_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Camellia Cipher Algorithm, sparc64 camellia opcode accelerated");
+
+MODULE_ALIAS_CRYPTO("camellia");
+
+#include "crop_devid.c"
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