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-rw-r--r--arch/sparc/crypto/des_glue.c483
1 files changed, 483 insertions, 0 deletions
diff --git a/arch/sparc/crypto/des_glue.c b/arch/sparc/crypto/des_glue.c
new file mode 100644
index 000000000..a499102bf
--- /dev/null
+++ b/arch/sparc/crypto/des_glue.c
@@ -0,0 +1,483 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Glue code for DES 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/des.h>
+#include <crypto/internal/skcipher.h>
+
+#include <asm/fpumacro.h>
+#include <asm/pstate.h>
+#include <asm/elf.h>
+
+#include "opcodes.h"
+
+struct des_sparc64_ctx {
+ u64 encrypt_expkey[DES_EXPKEY_WORDS / 2];
+ u64 decrypt_expkey[DES_EXPKEY_WORDS / 2];
+};
+
+struct des3_ede_sparc64_ctx {
+ u64 encrypt_expkey[DES3_EDE_EXPKEY_WORDS / 2];
+ u64 decrypt_expkey[DES3_EDE_EXPKEY_WORDS / 2];
+};
+
+static void encrypt_to_decrypt(u64 *d, const u64 *e)
+{
+ const u64 *s = e + (DES_EXPKEY_WORDS / 2) - 1;
+ int i;
+
+ for (i = 0; i < DES_EXPKEY_WORDS / 2; i++)
+ *d++ = *s--;
+}
+
+extern void des_sparc64_key_expand(const u32 *input_key, u64 *key);
+
+static int des_set_key(struct crypto_tfm *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ struct des_sparc64_ctx *dctx = crypto_tfm_ctx(tfm);
+ int err;
+
+ /* Even though we have special instructions for key expansion,
+ * we call des_verify_key() so that we don't have to write our own
+ * weak key detection code.
+ */
+ err = crypto_des_verify_key(tfm, key);
+ if (err)
+ return err;
+
+ des_sparc64_key_expand((const u32 *) key, &dctx->encrypt_expkey[0]);
+ encrypt_to_decrypt(&dctx->decrypt_expkey[0], &dctx->encrypt_expkey[0]);
+
+ return 0;
+}
+
+static int des_set_key_skcipher(struct crypto_skcipher *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ return des_set_key(crypto_skcipher_tfm(tfm), key, keylen);
+}
+
+extern void des_sparc64_crypt(const u64 *key, const u64 *input,
+ u64 *output);
+
+static void sparc_des_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+ struct des_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
+ const u64 *K = ctx->encrypt_expkey;
+
+ des_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
+}
+
+static void sparc_des_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+ struct des_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
+ const u64 *K = ctx->decrypt_expkey;
+
+ des_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
+}
+
+extern void des_sparc64_load_keys(const u64 *key);
+
+extern void des_sparc64_ecb_crypt(const u64 *input, u64 *output,
+ unsigned int len);
+
+static int __ecb_crypt(struct skcipher_request *req, bool encrypt)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ const struct des_sparc64_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;
+
+ if (encrypt)
+ des_sparc64_load_keys(&ctx->encrypt_expkey[0]);
+ else
+ des_sparc64_load_keys(&ctx->decrypt_expkey[0]);
+ while ((nbytes = walk.nbytes) != 0) {
+ des_sparc64_ecb_crypt(walk.src.virt.addr, walk.dst.virt.addr,
+ round_down(nbytes, DES_BLOCK_SIZE));
+ err = skcipher_walk_done(&walk, nbytes % DES_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);
+}
+
+extern void des_sparc64_cbc_encrypt(const u64 *input, u64 *output,
+ unsigned int len, u64 *iv);
+
+extern void des_sparc64_cbc_decrypt(const u64 *input, u64 *output,
+ unsigned int len, u64 *iv);
+
+static int __cbc_crypt(struct skcipher_request *req, bool encrypt)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ const struct des_sparc64_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;
+
+ if (encrypt)
+ des_sparc64_load_keys(&ctx->encrypt_expkey[0]);
+ else
+ des_sparc64_load_keys(&ctx->decrypt_expkey[0]);
+ while ((nbytes = walk.nbytes) != 0) {
+ if (encrypt)
+ des_sparc64_cbc_encrypt(walk.src.virt.addr,
+ walk.dst.virt.addr,
+ round_down(nbytes,
+ DES_BLOCK_SIZE),
+ walk.iv);
+ else
+ des_sparc64_cbc_decrypt(walk.src.virt.addr,
+ walk.dst.virt.addr,
+ round_down(nbytes,
+ DES_BLOCK_SIZE),
+ walk.iv);
+ err = skcipher_walk_done(&walk, nbytes % DES_BLOCK_SIZE);
+ }
+ fprs_write(0);
+ return err;
+}
+
+static int cbc_encrypt(struct skcipher_request *req)
+{
+ return __cbc_crypt(req, true);
+}
+
+static int cbc_decrypt(struct skcipher_request *req)
+{
+ return __cbc_crypt(req, false);
+}
+
+static int des3_ede_set_key(struct crypto_tfm *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ struct des3_ede_sparc64_ctx *dctx = crypto_tfm_ctx(tfm);
+ u64 k1[DES_EXPKEY_WORDS / 2];
+ u64 k2[DES_EXPKEY_WORDS / 2];
+ u64 k3[DES_EXPKEY_WORDS / 2];
+ int err;
+
+ err = crypto_des3_ede_verify_key(tfm, key);
+ if (err)
+ return err;
+
+ des_sparc64_key_expand((const u32 *)key, k1);
+ key += DES_KEY_SIZE;
+ des_sparc64_key_expand((const u32 *)key, k2);
+ key += DES_KEY_SIZE;
+ des_sparc64_key_expand((const u32 *)key, k3);
+
+ memcpy(&dctx->encrypt_expkey[0], &k1[0], sizeof(k1));
+ encrypt_to_decrypt(&dctx->encrypt_expkey[DES_EXPKEY_WORDS / 2], &k2[0]);
+ memcpy(&dctx->encrypt_expkey[(DES_EXPKEY_WORDS / 2) * 2],
+ &k3[0], sizeof(k3));
+
+ encrypt_to_decrypt(&dctx->decrypt_expkey[0], &k3[0]);
+ memcpy(&dctx->decrypt_expkey[DES_EXPKEY_WORDS / 2],
+ &k2[0], sizeof(k2));
+ encrypt_to_decrypt(&dctx->decrypt_expkey[(DES_EXPKEY_WORDS / 2) * 2],
+ &k1[0]);
+
+ return 0;
+}
+
+static int des3_ede_set_key_skcipher(struct crypto_skcipher *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ return des3_ede_set_key(crypto_skcipher_tfm(tfm), key, keylen);
+}
+
+extern void des3_ede_sparc64_crypt(const u64 *key, const u64 *input,
+ u64 *output);
+
+static void sparc_des3_ede_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+ struct des3_ede_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
+ const u64 *K = ctx->encrypt_expkey;
+
+ des3_ede_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
+}
+
+static void sparc_des3_ede_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+ struct des3_ede_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
+ const u64 *K = ctx->decrypt_expkey;
+
+ des3_ede_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
+}
+
+extern void des3_ede_sparc64_load_keys(const u64 *key);
+
+extern void des3_ede_sparc64_ecb_crypt(const u64 *expkey, const u64 *input,
+ u64 *output, unsigned int len);
+
+static int __ecb3_crypt(struct skcipher_request *req, bool encrypt)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ const struct des3_ede_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
+ struct skcipher_walk walk;
+ const u64 *K;
+ unsigned int nbytes;
+ int err;
+
+ err = skcipher_walk_virt(&walk, req, true);
+ if (err)
+ return err;
+
+ if (encrypt)
+ K = &ctx->encrypt_expkey[0];
+ else
+ K = &ctx->decrypt_expkey[0];
+ des3_ede_sparc64_load_keys(K);
+ while ((nbytes = walk.nbytes) != 0) {
+ des3_ede_sparc64_ecb_crypt(K, walk.src.virt.addr,
+ walk.dst.virt.addr,
+ round_down(nbytes, DES_BLOCK_SIZE));
+ err = skcipher_walk_done(&walk, nbytes % DES_BLOCK_SIZE);
+ }
+ fprs_write(0);
+ return err;
+}
+
+static int ecb3_encrypt(struct skcipher_request *req)
+{
+ return __ecb3_crypt(req, true);
+}
+
+static int ecb3_decrypt(struct skcipher_request *req)
+{
+ return __ecb3_crypt(req, false);
+}
+
+extern void des3_ede_sparc64_cbc_encrypt(const u64 *expkey, const u64 *input,
+ u64 *output, unsigned int len,
+ u64 *iv);
+
+extern void des3_ede_sparc64_cbc_decrypt(const u64 *expkey, const u64 *input,
+ u64 *output, unsigned int len,
+ u64 *iv);
+
+static int __cbc3_crypt(struct skcipher_request *req, bool encrypt)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ const struct des3_ede_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
+ struct skcipher_walk walk;
+ const u64 *K;
+ unsigned int nbytes;
+ int err;
+
+ err = skcipher_walk_virt(&walk, req, true);
+ if (err)
+ return err;
+
+ if (encrypt)
+ K = &ctx->encrypt_expkey[0];
+ else
+ K = &ctx->decrypt_expkey[0];
+ des3_ede_sparc64_load_keys(K);
+ while ((nbytes = walk.nbytes) != 0) {
+ if (encrypt)
+ des3_ede_sparc64_cbc_encrypt(K, walk.src.virt.addr,
+ walk.dst.virt.addr,
+ round_down(nbytes,
+ DES_BLOCK_SIZE),
+ walk.iv);
+ else
+ des3_ede_sparc64_cbc_decrypt(K, walk.src.virt.addr,
+ walk.dst.virt.addr,
+ round_down(nbytes,
+ DES_BLOCK_SIZE),
+ walk.iv);
+ err = skcipher_walk_done(&walk, nbytes % DES_BLOCK_SIZE);
+ }
+ fprs_write(0);
+ return err;
+}
+
+static int cbc3_encrypt(struct skcipher_request *req)
+{
+ return __cbc3_crypt(req, true);
+}
+
+static int cbc3_decrypt(struct skcipher_request *req)
+{
+ return __cbc3_crypt(req, false);
+}
+
+static struct crypto_alg cipher_algs[] = {
+ {
+ .cra_name = "des",
+ .cra_driver_name = "des-sparc64",
+ .cra_priority = SPARC_CR_OPCODE_PRIORITY,
+ .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
+ .cra_blocksize = DES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct des_sparc64_ctx),
+ .cra_alignmask = 7,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .cipher = {
+ .cia_min_keysize = DES_KEY_SIZE,
+ .cia_max_keysize = DES_KEY_SIZE,
+ .cia_setkey = des_set_key,
+ .cia_encrypt = sparc_des_encrypt,
+ .cia_decrypt = sparc_des_decrypt
+ }
+ }
+ }, {
+ .cra_name = "des3_ede",
+ .cra_driver_name = "des3_ede-sparc64",
+ .cra_priority = SPARC_CR_OPCODE_PRIORITY,
+ .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
+ .cra_blocksize = DES3_EDE_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct des3_ede_sparc64_ctx),
+ .cra_alignmask = 7,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .cipher = {
+ .cia_min_keysize = DES3_EDE_KEY_SIZE,
+ .cia_max_keysize = DES3_EDE_KEY_SIZE,
+ .cia_setkey = des3_ede_set_key,
+ .cia_encrypt = sparc_des3_ede_encrypt,
+ .cia_decrypt = sparc_des3_ede_decrypt
+ }
+ }
+ }
+};
+
+static struct skcipher_alg skcipher_algs[] = {
+ {
+ .base.cra_name = "ecb(des)",
+ .base.cra_driver_name = "ecb-des-sparc64",
+ .base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
+ .base.cra_blocksize = DES_BLOCK_SIZE,
+ .base.cra_ctxsize = sizeof(struct des_sparc64_ctx),
+ .base.cra_alignmask = 7,
+ .base.cra_module = THIS_MODULE,
+ .min_keysize = DES_KEY_SIZE,
+ .max_keysize = DES_KEY_SIZE,
+ .setkey = des_set_key_skcipher,
+ .encrypt = ecb_encrypt,
+ .decrypt = ecb_decrypt,
+ }, {
+ .base.cra_name = "cbc(des)",
+ .base.cra_driver_name = "cbc-des-sparc64",
+ .base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
+ .base.cra_blocksize = DES_BLOCK_SIZE,
+ .base.cra_ctxsize = sizeof(struct des_sparc64_ctx),
+ .base.cra_alignmask = 7,
+ .base.cra_module = THIS_MODULE,
+ .min_keysize = DES_KEY_SIZE,
+ .max_keysize = DES_KEY_SIZE,
+ .ivsize = DES_BLOCK_SIZE,
+ .setkey = des_set_key_skcipher,
+ .encrypt = cbc_encrypt,
+ .decrypt = cbc_decrypt,
+ }, {
+ .base.cra_name = "ecb(des3_ede)",
+ .base.cra_driver_name = "ecb-des3_ede-sparc64",
+ .base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
+ .base.cra_blocksize = DES3_EDE_BLOCK_SIZE,
+ .base.cra_ctxsize = sizeof(struct des3_ede_sparc64_ctx),
+ .base.cra_alignmask = 7,
+ .base.cra_module = THIS_MODULE,
+ .min_keysize = DES3_EDE_KEY_SIZE,
+ .max_keysize = DES3_EDE_KEY_SIZE,
+ .setkey = des3_ede_set_key_skcipher,
+ .encrypt = ecb3_encrypt,
+ .decrypt = ecb3_decrypt,
+ }, {
+ .base.cra_name = "cbc(des3_ede)",
+ .base.cra_driver_name = "cbc-des3_ede-sparc64",
+ .base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
+ .base.cra_blocksize = DES3_EDE_BLOCK_SIZE,
+ .base.cra_ctxsize = sizeof(struct des3_ede_sparc64_ctx),
+ .base.cra_alignmask = 7,
+ .base.cra_module = THIS_MODULE,
+ .min_keysize = DES3_EDE_KEY_SIZE,
+ .max_keysize = DES3_EDE_KEY_SIZE,
+ .ivsize = DES3_EDE_BLOCK_SIZE,
+ .setkey = des3_ede_set_key_skcipher,
+ .encrypt = cbc3_encrypt,
+ .decrypt = cbc3_decrypt,
+ }
+};
+
+static bool __init sparc64_has_des_opcode(void)
+{
+ unsigned long cfr;
+
+ if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
+ return false;
+
+ __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
+ if (!(cfr & CFR_DES))
+ return false;
+
+ return true;
+}
+
+static int __init des_sparc64_mod_init(void)
+{
+ int err;
+
+ if (!sparc64_has_des_opcode()) {
+ pr_info("sparc64 des opcodes not available.\n");
+ return -ENODEV;
+ }
+ pr_info("Using sparc64 des opcodes optimized DES implementation\n");
+ err = crypto_register_algs(cipher_algs, ARRAY_SIZE(cipher_algs));
+ if (err)
+ return err;
+ err = crypto_register_skciphers(skcipher_algs,
+ ARRAY_SIZE(skcipher_algs));
+ if (err)
+ crypto_unregister_algs(cipher_algs, ARRAY_SIZE(cipher_algs));
+ return err;
+}
+
+static void __exit des_sparc64_mod_fini(void)
+{
+ crypto_unregister_algs(cipher_algs, ARRAY_SIZE(cipher_algs));
+ crypto_unregister_skciphers(skcipher_algs, ARRAY_SIZE(skcipher_algs));
+}
+
+module_init(des_sparc64_mod_init);
+module_exit(des_sparc64_mod_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms, sparc64 des opcode accelerated");
+
+MODULE_ALIAS_CRYPTO("des");
+MODULE_ALIAS_CRYPTO("des3_ede");
+
+#include "crop_devid.c"
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