diff options
| author | Varun Wadekar <vwadekar@nvidia.com> | 2011-02-11 02:02:14 -0800 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2011-11-30 21:43:03 -0800 |
| commit | 41e361ff01e39494a8b4dce6664a428b22f1dfc3 (patch) | |
| tree | fae8d1193decd53baa148f7f5027f5f0378ebf32 /drivers/misc/tegra-cryptodev.h | |
| parent | 8051399a2fe395ef7a6344d242dff13103a3b993 (diff) | |
misc: tegra-cryptodev: device node to access tegra aes hw
/dev/tegra-crypto node to access tegra aes hw from the
user space. currently ecb/cbc/ansi_x9.31 modes are supported
Original-Change-Id: I8d9e48d4b139e9c2e26a885773fb2f792fb6ca87
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
Reviewed-on: http://git-master/r/16046
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Rebase-Id: R1e3e1f059255adb13d39c4332f6cdfb3f3c8c3f0
Diffstat (limited to 'drivers/misc/tegra-cryptodev.h')
| -rw-r--r-- | drivers/misc/tegra-cryptodev.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/drivers/misc/tegra-cryptodev.h b/drivers/misc/tegra-cryptodev.h new file mode 100644 index 000000000000..ed62a52eca03 --- /dev/null +++ b/drivers/misc/tegra-cryptodev.h @@ -0,0 +1,70 @@ +/* + * Copyright (c) 2010, NVIDIA Corporation. + * + * 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. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#ifndef __TEGRA_CRYPTODEV_H +#define __TEGRA_CRYPTODEV_H + +#include <crypto/aes.h> + +#include <asm-generic/ioctl.h> + +/* ioctl arg = 1 if you want to use ssk. arg = 0 to use normal key */ +#define TEGRA_CRYPTO_IOCTL_NEED_SSK _IOWR(0x98, 100, int) +#define TEGRA_CRYPTO_IOCTL_PROCESS_REQ _IOWR(0x98, 101, int*) +#define TEGRA_CRYPTO_IOCTL_SET_SEED _IOWR(0x98, 102, int*) +#define TEGRA_CRYPTO_IOCTL_GET_RANDOM _IOWR(0x98, 103, int*) + +#define TEGRA_CRYPTO_MAX_KEY_SIZE AES_MAX_KEY_SIZE +#define TEGRA_CRYPTO_IV_SIZE AES_BLOCK_SIZE +#define DEFAULT_RNG_BLK_SZ 16 + +/* the seed consists of 16 bytes of key + 16 bytes of init vector */ +#define TEGRA_CRYPTO_RNG_SEED_SIZE AES_KEYSIZE_128 + DEFAULT_RNG_BLK_SZ +#define TEGRA_CRYPTO_RNG_SIZE SZ_16 + +/* encrypt/decrypt operations */ +#define TEGRA_CRYPTO_ECB BIT(0) +#define TEGRA_CRYPTO_CBC BIT(1) +#define TEGRA_CRYPTO_RNG BIT(2) + +/* a pointer to this struct needs to be passed to: + * TEGRA_CRYPTO_IOCTL_PROCESS_REQ + */ +struct tegra_crypt_req { + int op; /* e.g. TEGRA_CRYPTO_ECB */ + bool encrypt; + char key[TEGRA_CRYPTO_MAX_KEY_SIZE]; + int keylen; + char iv[TEGRA_CRYPTO_IV_SIZE]; + int ivlen; + u8 *plaintext; + int plaintext_sz; + u8 *result; +}; + +/* pointer to this struct should be passed to: + * TEGRA_CRYPTO_IOCTL_SET_SEED + * TEGRA_CRYPTO_IOCTL_GET_RANDOM + */ +struct tegra_rng_req { + u8 seed[TEGRA_CRYPTO_RNG_SEED_SIZE]; + u8 *rdata; /* random generated data */ + int nbytes; /* random data length */ +}; + +#endif |