541 lines
14 KiB
C
541 lines
14 KiB
C
/* Glue code for DES encryption optimized for sparc64 crypto opcodes.
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*
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* Copyright (C) 2012 David S. Miller <davem@davemloft.net>
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/crypto.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/types.h>
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#include <crypto/algapi.h>
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#include <crypto/des.h>
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#include <asm/fpumacro.h>
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#include <asm/pstate.h>
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#include <asm/elf.h>
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#include "opcodes.h"
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struct des_sparc64_ctx {
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u64 encrypt_expkey[DES_EXPKEY_WORDS / 2];
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u64 decrypt_expkey[DES_EXPKEY_WORDS / 2];
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};
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struct des3_ede_sparc64_ctx {
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u64 encrypt_expkey[DES3_EDE_EXPKEY_WORDS / 2];
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u64 decrypt_expkey[DES3_EDE_EXPKEY_WORDS / 2];
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};
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static void encrypt_to_decrypt(u64 *d, const u64 *e)
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{
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const u64 *s = e + (DES_EXPKEY_WORDS / 2) - 1;
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int i;
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for (i = 0; i < DES_EXPKEY_WORDS / 2; i++)
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*d++ = *s--;
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}
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extern void des_sparc64_key_expand(const u32 *input_key, u64 *key);
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static int des_set_key(struct crypto_tfm *tfm, const u8 *key,
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unsigned int keylen)
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{
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struct des_sparc64_ctx *dctx = crypto_tfm_ctx(tfm);
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u32 *flags = &tfm->crt_flags;
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u32 tmp[DES_EXPKEY_WORDS];
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int ret;
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/* Even though we have special instructions for key expansion,
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* we call des_ekey() so that we don't have to write our own
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* weak key detection code.
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*/
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ret = des_ekey(tmp, key);
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if (unlikely(ret == 0) && (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
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*flags |= CRYPTO_TFM_RES_WEAK_KEY;
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return -EINVAL;
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}
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des_sparc64_key_expand((const u32 *) key, &dctx->encrypt_expkey[0]);
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encrypt_to_decrypt(&dctx->decrypt_expkey[0], &dctx->encrypt_expkey[0]);
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return 0;
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}
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extern void des_sparc64_crypt(const u64 *key, const u64 *input,
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u64 *output);
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static void des_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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{
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struct des_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
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const u64 *K = ctx->encrypt_expkey;
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des_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
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}
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static void des_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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{
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struct des_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
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const u64 *K = ctx->decrypt_expkey;
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des_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
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}
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extern void des_sparc64_load_keys(const u64 *key);
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extern void des_sparc64_ecb_crypt(const u64 *input, u64 *output,
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unsigned int len);
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#define DES_BLOCK_MASK (~(DES_BLOCK_SIZE - 1))
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static int __ecb_crypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes, bool encrypt)
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{
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struct des_sparc64_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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struct blkcipher_walk walk;
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int err;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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if (encrypt)
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des_sparc64_load_keys(&ctx->encrypt_expkey[0]);
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else
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des_sparc64_load_keys(&ctx->decrypt_expkey[0]);
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while ((nbytes = walk.nbytes)) {
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unsigned int block_len = nbytes & DES_BLOCK_MASK;
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if (likely(block_len)) {
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des_sparc64_ecb_crypt((const u64 *)walk.src.virt.addr,
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(u64 *) walk.dst.virt.addr,
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block_len);
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}
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nbytes &= DES_BLOCK_SIZE - 1;
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err = blkcipher_walk_done(desc, &walk, nbytes);
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}
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fprs_write(0);
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return err;
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}
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static int ecb_encrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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{
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return __ecb_crypt(desc, dst, src, nbytes, true);
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}
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static int ecb_decrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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{
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return __ecb_crypt(desc, dst, src, nbytes, false);
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}
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extern void des_sparc64_cbc_encrypt(const u64 *input, u64 *output,
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unsigned int len, u64 *iv);
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static int cbc_encrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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{
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struct des_sparc64_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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struct blkcipher_walk walk;
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int err;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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des_sparc64_load_keys(&ctx->encrypt_expkey[0]);
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while ((nbytes = walk.nbytes)) {
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unsigned int block_len = nbytes & DES_BLOCK_MASK;
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if (likely(block_len)) {
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des_sparc64_cbc_encrypt((const u64 *)walk.src.virt.addr,
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(u64 *) walk.dst.virt.addr,
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block_len, (u64 *) walk.iv);
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}
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nbytes &= DES_BLOCK_SIZE - 1;
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err = blkcipher_walk_done(desc, &walk, nbytes);
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}
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fprs_write(0);
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return err;
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}
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extern void des_sparc64_cbc_decrypt(const u64 *input, u64 *output,
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unsigned int len, u64 *iv);
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static int cbc_decrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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{
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struct des_sparc64_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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struct blkcipher_walk walk;
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int err;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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des_sparc64_load_keys(&ctx->decrypt_expkey[0]);
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while ((nbytes = walk.nbytes)) {
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unsigned int block_len = nbytes & DES_BLOCK_MASK;
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if (likely(block_len)) {
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des_sparc64_cbc_decrypt((const u64 *)walk.src.virt.addr,
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(u64 *) walk.dst.virt.addr,
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block_len, (u64 *) walk.iv);
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}
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nbytes &= DES_BLOCK_SIZE - 1;
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err = blkcipher_walk_done(desc, &walk, nbytes);
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}
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fprs_write(0);
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return err;
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}
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static int des3_ede_set_key(struct crypto_tfm *tfm, const u8 *key,
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unsigned int keylen)
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{
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struct des3_ede_sparc64_ctx *dctx = crypto_tfm_ctx(tfm);
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const u32 *K = (const u32 *)key;
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u32 *flags = &tfm->crt_flags;
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u64 k1[DES_EXPKEY_WORDS / 2];
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u64 k2[DES_EXPKEY_WORDS / 2];
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u64 k3[DES_EXPKEY_WORDS / 2];
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if (unlikely(!((K[0] ^ K[2]) | (K[1] ^ K[3])) ||
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!((K[2] ^ K[4]) | (K[3] ^ K[5]))) &&
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(*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
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*flags |= CRYPTO_TFM_RES_WEAK_KEY;
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return -EINVAL;
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}
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des_sparc64_key_expand((const u32 *)key, k1);
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key += DES_KEY_SIZE;
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des_sparc64_key_expand((const u32 *)key, k2);
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key += DES_KEY_SIZE;
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des_sparc64_key_expand((const u32 *)key, k3);
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memcpy(&dctx->encrypt_expkey[0], &k1[0], sizeof(k1));
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encrypt_to_decrypt(&dctx->encrypt_expkey[DES_EXPKEY_WORDS / 2], &k2[0]);
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memcpy(&dctx->encrypt_expkey[(DES_EXPKEY_WORDS / 2) * 2],
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&k3[0], sizeof(k3));
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encrypt_to_decrypt(&dctx->decrypt_expkey[0], &k3[0]);
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memcpy(&dctx->decrypt_expkey[DES_EXPKEY_WORDS / 2],
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&k2[0], sizeof(k2));
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encrypt_to_decrypt(&dctx->decrypt_expkey[(DES_EXPKEY_WORDS / 2) * 2],
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&k1[0]);
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return 0;
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}
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extern void des3_ede_sparc64_crypt(const u64 *key, const u64 *input,
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u64 *output);
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static void des3_ede_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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{
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struct des3_ede_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
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const u64 *K = ctx->encrypt_expkey;
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des3_ede_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
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}
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static void des3_ede_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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{
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struct des3_ede_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
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const u64 *K = ctx->decrypt_expkey;
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des3_ede_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
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}
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extern void des3_ede_sparc64_load_keys(const u64 *key);
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extern void des3_ede_sparc64_ecb_crypt(const u64 *expkey, const u64 *input,
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u64 *output, unsigned int len);
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static int __ecb3_crypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes, bool encrypt)
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{
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struct des3_ede_sparc64_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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struct blkcipher_walk walk;
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const u64 *K;
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int err;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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if (encrypt)
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K = &ctx->encrypt_expkey[0];
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else
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K = &ctx->decrypt_expkey[0];
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des3_ede_sparc64_load_keys(K);
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while ((nbytes = walk.nbytes)) {
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unsigned int block_len = nbytes & DES_BLOCK_MASK;
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if (likely(block_len)) {
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const u64 *src64 = (const u64 *)walk.src.virt.addr;
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des3_ede_sparc64_ecb_crypt(K, src64,
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(u64 *) walk.dst.virt.addr,
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block_len);
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}
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nbytes &= DES_BLOCK_SIZE - 1;
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err = blkcipher_walk_done(desc, &walk, nbytes);
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}
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fprs_write(0);
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return err;
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}
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static int ecb3_encrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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{
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return __ecb3_crypt(desc, dst, src, nbytes, true);
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}
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static int ecb3_decrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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{
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return __ecb3_crypt(desc, dst, src, nbytes, false);
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}
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extern void des3_ede_sparc64_cbc_encrypt(const u64 *expkey, const u64 *input,
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u64 *output, unsigned int len,
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u64 *iv);
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static int cbc3_encrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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{
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struct des3_ede_sparc64_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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struct blkcipher_walk walk;
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const u64 *K;
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int err;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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K = &ctx->encrypt_expkey[0];
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des3_ede_sparc64_load_keys(K);
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while ((nbytes = walk.nbytes)) {
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unsigned int block_len = nbytes & DES_BLOCK_MASK;
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if (likely(block_len)) {
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const u64 *src64 = (const u64 *)walk.src.virt.addr;
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des3_ede_sparc64_cbc_encrypt(K, src64,
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(u64 *) walk.dst.virt.addr,
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block_len,
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(u64 *) walk.iv);
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}
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nbytes &= DES_BLOCK_SIZE - 1;
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err = blkcipher_walk_done(desc, &walk, nbytes);
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}
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fprs_write(0);
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return err;
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}
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extern void des3_ede_sparc64_cbc_decrypt(const u64 *expkey, const u64 *input,
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u64 *output, unsigned int len,
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u64 *iv);
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static int cbc3_decrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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{
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struct des3_ede_sparc64_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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struct blkcipher_walk walk;
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const u64 *K;
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int err;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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K = &ctx->decrypt_expkey[0];
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des3_ede_sparc64_load_keys(K);
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while ((nbytes = walk.nbytes)) {
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unsigned int block_len = nbytes & DES_BLOCK_MASK;
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if (likely(block_len)) {
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const u64 *src64 = (const u64 *)walk.src.virt.addr;
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des3_ede_sparc64_cbc_decrypt(K, src64,
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(u64 *) walk.dst.virt.addr,
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block_len,
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(u64 *) walk.iv);
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}
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nbytes &= DES_BLOCK_SIZE - 1;
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err = blkcipher_walk_done(desc, &walk, nbytes);
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}
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fprs_write(0);
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return err;
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}
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static struct crypto_alg algs[] = { {
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.cra_name = "des",
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.cra_driver_name = "des-sparc64",
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.cra_priority = SPARC_CR_OPCODE_PRIORITY,
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.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
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.cra_blocksize = DES_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct des_sparc64_ctx),
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.cra_alignmask = 7,
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.cra_module = THIS_MODULE,
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.cra_u = {
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.cipher = {
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.cia_min_keysize = DES_KEY_SIZE,
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.cia_max_keysize = DES_KEY_SIZE,
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.cia_setkey = des_set_key,
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.cia_encrypt = des_encrypt,
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.cia_decrypt = des_decrypt
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}
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}
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}, {
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.cra_name = "ecb(des)",
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.cra_driver_name = "ecb-des-sparc64",
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.cra_priority = SPARC_CR_OPCODE_PRIORITY,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
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.cra_blocksize = DES_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct des_sparc64_ctx),
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.cra_alignmask = 7,
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.cra_type = &crypto_blkcipher_type,
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.cra_module = THIS_MODULE,
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.cra_u = {
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.blkcipher = {
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.min_keysize = DES_KEY_SIZE,
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.max_keysize = DES_KEY_SIZE,
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.setkey = des_set_key,
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.encrypt = ecb_encrypt,
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.decrypt = ecb_decrypt,
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},
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},
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}, {
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.cra_name = "cbc(des)",
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.cra_driver_name = "cbc-des-sparc64",
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.cra_priority = SPARC_CR_OPCODE_PRIORITY,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
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.cra_blocksize = DES_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct des_sparc64_ctx),
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.cra_alignmask = 7,
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.cra_type = &crypto_blkcipher_type,
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.cra_module = THIS_MODULE,
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.cra_u = {
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.blkcipher = {
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.min_keysize = DES_KEY_SIZE,
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.max_keysize = DES_KEY_SIZE,
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.ivsize = DES_BLOCK_SIZE,
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.setkey = des_set_key,
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.encrypt = cbc_encrypt,
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.decrypt = cbc_decrypt,
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},
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},
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}, {
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.cra_name = "des3_ede",
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.cra_driver_name = "des3_ede-sparc64",
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.cra_priority = SPARC_CR_OPCODE_PRIORITY,
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.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
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.cra_blocksize = DES3_EDE_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct des3_ede_sparc64_ctx),
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.cra_alignmask = 7,
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.cra_module = THIS_MODULE,
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.cra_u = {
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.cipher = {
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.cia_min_keysize = DES3_EDE_KEY_SIZE,
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.cia_max_keysize = DES3_EDE_KEY_SIZE,
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.cia_setkey = des3_ede_set_key,
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.cia_encrypt = des3_ede_encrypt,
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.cia_decrypt = des3_ede_decrypt
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}
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}
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}, {
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.cra_name = "ecb(des3_ede)",
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.cra_driver_name = "ecb-des3_ede-sparc64",
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.cra_priority = SPARC_CR_OPCODE_PRIORITY,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
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.cra_blocksize = DES3_EDE_BLOCK_SIZE,
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|
.cra_ctxsize = sizeof(struct des3_ede_sparc64_ctx),
|
|
.cra_alignmask = 7,
|
|
.cra_type = &crypto_blkcipher_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_u = {
|
|
.blkcipher = {
|
|
.min_keysize = DES3_EDE_KEY_SIZE,
|
|
.max_keysize = DES3_EDE_KEY_SIZE,
|
|
.setkey = des3_ede_set_key,
|
|
.encrypt = ecb3_encrypt,
|
|
.decrypt = ecb3_decrypt,
|
|
},
|
|
},
|
|
}, {
|
|
.cra_name = "cbc(des3_ede)",
|
|
.cra_driver_name = "cbc-des3_ede-sparc64",
|
|
.cra_priority = SPARC_CR_OPCODE_PRIORITY,
|
|
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
.cra_blocksize = DES3_EDE_BLOCK_SIZE,
|
|
.cra_ctxsize = sizeof(struct des3_ede_sparc64_ctx),
|
|
.cra_alignmask = 7,
|
|
.cra_type = &crypto_blkcipher_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_u = {
|
|
.blkcipher = {
|
|
.min_keysize = DES3_EDE_KEY_SIZE,
|
|
.max_keysize = DES3_EDE_KEY_SIZE,
|
|
.ivsize = DES3_EDE_BLOCK_SIZE,
|
|
.setkey = des3_ede_set_key,
|
|
.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 i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(algs); i++)
|
|
INIT_LIST_HEAD(&algs[i].cra_list);
|
|
|
|
if (sparc64_has_des_opcode()) {
|
|
pr_info("Using sparc64 des opcodes optimized DES implementation\n");
|
|
return crypto_register_algs(algs, ARRAY_SIZE(algs));
|
|
}
|
|
pr_info("sparc64 des opcodes not available.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
static void __exit des_sparc64_mod_fini(void)
|
|
{
|
|
crypto_unregister_algs(algs, ARRAY_SIZE(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"
|