diff options
Diffstat (limited to 'arch/mips/cavium-octeon/crypto/octeon-md5.c')
| -rw-r--r-- | arch/mips/cavium-octeon/crypto/octeon-md5.c | 214 |
1 files changed, 0 insertions, 214 deletions
diff --git a/arch/mips/cavium-octeon/crypto/octeon-md5.c b/arch/mips/cavium-octeon/crypto/octeon-md5.c deleted file mode 100644 index a8ce831e2ceb..000000000000 --- a/arch/mips/cavium-octeon/crypto/octeon-md5.c +++ /dev/null @@ -1,214 +0,0 @@ -/* - * Cryptographic API. - * - * MD5 Message Digest Algorithm (RFC1321). - * - * Adapted for OCTEON by Aaro Koskinen <aaro.koskinen@iki.fi>. - * - * Based on crypto/md5.c, which is: - * - * Derived from cryptoapi implementation, originally based on the - * public domain implementation written by Colin Plumb in 1993. - * - * Copyright (c) Cryptoapi developers. - * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the Free - * Software Foundation; either version 2 of the License, or (at your option) - * any later version. - */ - -#include <asm/octeon/crypto.h> -#include <asm/octeon/octeon.h> -#include <crypto/internal/hash.h> -#include <crypto/md5.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/string.h> -#include <linux/unaligned.h> - -struct octeon_md5_state { - __le32 hash[MD5_HASH_WORDS]; - u64 byte_count; -}; - -/* - * We pass everything as 64-bit. OCTEON can handle misaligned data. - */ - -static void octeon_md5_store_hash(struct octeon_md5_state *ctx) -{ - u64 *hash = (u64 *)ctx->hash; - - write_octeon_64bit_hash_dword(hash[0], 0); - write_octeon_64bit_hash_dword(hash[1], 1); -} - -static void octeon_md5_read_hash(struct octeon_md5_state *ctx) -{ - u64 *hash = (u64 *)ctx->hash; - - hash[0] = read_octeon_64bit_hash_dword(0); - hash[1] = read_octeon_64bit_hash_dword(1); -} - -static void octeon_md5_transform(const void *_block) -{ - const u64 *block = _block; - - write_octeon_64bit_block_dword(block[0], 0); - write_octeon_64bit_block_dword(block[1], 1); - write_octeon_64bit_block_dword(block[2], 2); - write_octeon_64bit_block_dword(block[3], 3); - write_octeon_64bit_block_dword(block[4], 4); - write_octeon_64bit_block_dword(block[5], 5); - write_octeon_64bit_block_dword(block[6], 6); - octeon_md5_start(block[7]); -} - -static int octeon_md5_init(struct shash_desc *desc) -{ - struct octeon_md5_state *mctx = shash_desc_ctx(desc); - - mctx->hash[0] = cpu_to_le32(MD5_H0); - mctx->hash[1] = cpu_to_le32(MD5_H1); - mctx->hash[2] = cpu_to_le32(MD5_H2); - mctx->hash[3] = cpu_to_le32(MD5_H3); - mctx->byte_count = 0; - - return 0; -} - -static int octeon_md5_update(struct shash_desc *desc, const u8 *data, - unsigned int len) -{ - struct octeon_md5_state *mctx = shash_desc_ctx(desc); - struct octeon_cop2_state state; - unsigned long flags; - - mctx->byte_count += len; - flags = octeon_crypto_enable(&state); - octeon_md5_store_hash(mctx); - - do { - octeon_md5_transform(data); - data += MD5_HMAC_BLOCK_SIZE; - len -= MD5_HMAC_BLOCK_SIZE; - } while (len >= MD5_HMAC_BLOCK_SIZE); - - octeon_md5_read_hash(mctx); - octeon_crypto_disable(&state, flags); - mctx->byte_count -= len; - return len; -} - -static int octeon_md5_finup(struct shash_desc *desc, const u8 *src, - unsigned int offset, u8 *out) -{ - struct octeon_md5_state *mctx = shash_desc_ctx(desc); - int padding = 56 - (offset + 1); - struct octeon_cop2_state state; - u32 block[MD5_BLOCK_WORDS]; - unsigned long flags; - char *p; - - p = memcpy(block, src, offset); - p += offset; - *p++ = 0x80; - - flags = octeon_crypto_enable(&state); - octeon_md5_store_hash(mctx); - - if (padding < 0) { - memset(p, 0x00, padding + sizeof(u64)); - octeon_md5_transform(block); - p = (char *)block; - padding = 56; - } - - memset(p, 0, padding); - mctx->byte_count += offset; - block[14] = mctx->byte_count << 3; - block[15] = mctx->byte_count >> 29; - cpu_to_le32_array(block + 14, 2); - octeon_md5_transform(block); - - octeon_md5_read_hash(mctx); - octeon_crypto_disable(&state, flags); - - memzero_explicit(block, sizeof(block)); - memcpy(out, mctx->hash, sizeof(mctx->hash)); - - return 0; -} - -static int octeon_md5_export(struct shash_desc *desc, void *out) -{ - struct octeon_md5_state *ctx = shash_desc_ctx(desc); - union { - u8 *u8; - u32 *u32; - u64 *u64; - } p = { .u8 = out }; - int i; - - for (i = 0; i < MD5_HASH_WORDS; i++) - put_unaligned(le32_to_cpu(ctx->hash[i]), p.u32++); - put_unaligned(ctx->byte_count, p.u64); - return 0; -} - -static int octeon_md5_import(struct shash_desc *desc, const void *in) -{ - struct octeon_md5_state *ctx = shash_desc_ctx(desc); - union { - const u8 *u8; - const u32 *u32; - const u64 *u64; - } p = { .u8 = in }; - int i; - - for (i = 0; i < MD5_HASH_WORDS; i++) - ctx->hash[i] = cpu_to_le32(get_unaligned(p.u32++)); - ctx->byte_count = get_unaligned(p.u64); - return 0; -} - -static struct shash_alg alg = { - .digestsize = MD5_DIGEST_SIZE, - .init = octeon_md5_init, - .update = octeon_md5_update, - .finup = octeon_md5_finup, - .export = octeon_md5_export, - .import = octeon_md5_import, - .statesize = MD5_STATE_SIZE, - .descsize = sizeof(struct octeon_md5_state), - .base = { - .cra_name = "md5", - .cra_driver_name= "octeon-md5", - .cra_priority = OCTEON_CR_OPCODE_PRIORITY, - .cra_flags = CRYPTO_AHASH_ALG_BLOCK_ONLY, - .cra_blocksize = MD5_HMAC_BLOCK_SIZE, - .cra_module = THIS_MODULE, - } -}; - -static int __init md5_mod_init(void) -{ - if (!octeon_has_crypto()) - return -ENOTSUPP; - return crypto_register_shash(&alg); -} - -static void __exit md5_mod_fini(void) -{ - crypto_unregister_shash(&alg); -} - -module_init(md5_mod_init); -module_exit(md5_mod_fini); - -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("MD5 Message Digest Algorithm (OCTEON)"); -MODULE_AUTHOR("Aaro Koskinen <aaro.koskinen@iki.fi>"); |
