Merge "cnss: add cnss_crypto for qcacld-2.0" (67cf5d7d) · Commits · e / devices / android_kernel_xiaomi_sm6125

drivers/net/wireless/Kconfig

+8 −0

Original line number	Diff line number	Diff line
		@@ -122,6 +122,14 @@ config WCNSS_MEM_PRE_ALLOC
		for it's internal usage and release it to back to pre allocated pool.
		This memory is allocated at the cold boot time.

		config CNSS_CRYPTO
		tristate "Enable CNSS crypto support"
		---help---
		Add crypto support for the WLAN driver module.
		This feature enable wlan driver to use the crypto APIs exported
		from cnss platform driver. This crypto APIs used to generate cipher
		key and add support for the WLAN driver module security protocol.

		config CLD_LL_CORE
		tristate "QTI core WLAN driver for QCA6174 chipset"
		select NL80211_TESTMODE

drivers/net/wireless/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -34,5 +34,6 @@ obj-$(CONFIG_CNSS) += cnss/
		obj-$(CONFIG_WCNSS_MEM_PRE_ALLOC) += cnss_prealloc/
		obj-$(CONFIG_CNSS_UTILS) += cnss_utils/
		obj-$(CONFIG_CNSS_GENL) += cnss_genl/
		obj-$(CONFIG_CNSS_CRYPTO) += cnss_crypto/

		obj-$(CONFIG_VIRT_WIFI) += virt_wifi.o

drivers/net/wireless/cnss_crypto/Makefile

0 → 100644

+1 −0

Original line number	Diff line number	Diff line
		obj-$(CONFIG_CNSS_CRYPTO) += cnss_secif.o

drivers/net/wireless/cnss_crypto/cnss_secif.c

0 → 100644

+171 −0

Original line number	Diff line number	Diff line
		/* Copyright (c) 2011-2013, 2015, 2018-2019, The Linux Foundation.
		* All rights reserved.
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 and
		* only version 2 as published by the Free Software Foundation.
		*
		* 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.
		*/

		#include <linux/export.h>
		#include <linux/qcomwlan_secif.h>
		#include <crypto/aes.h>

		/* APIs for calling crypto routines from kernel
		*/
		struct crypto_ahash wcnss_wlan_crypto_alloc_ahash(const char alg_name,
		u32 type, u32 mask)
		{
		return crypto_alloc_ahash(alg_name, type, mask);
		}
		EXPORT_SYMBOL(wcnss_wlan_crypto_alloc_ahash);

		int wcnss_wlan_crypto_ahash_digest(struct ahash_request *req)
		{
		return crypto_ahash_digest(req);
		}
		EXPORT_SYMBOL(wcnss_wlan_crypto_ahash_digest);

		void wcnss_wlan_crypto_free_ahash(struct crypto_ahash *tfm)
		{
		crypto_free_ahash(tfm);
		}
		EXPORT_SYMBOL(wcnss_wlan_crypto_free_ahash);

		int wcnss_wlan_crypto_ahash_setkey(struct crypto_ahash tfm, const u8 key,
		unsigned int keylen)
		{
		return crypto_ahash_setkey(tfm, key, keylen);
		}
		EXPORT_SYMBOL(wcnss_wlan_crypto_ahash_setkey);

		void wcnss_wlan_ablkcipher_request_free(struct ablkcipher_request *req)
		{
		ablkcipher_request_free(req);
		}
		EXPORT_SYMBOL(wcnss_wlan_ablkcipher_request_free);

		void wcnss_wlan_crypto_free_ablkcipher(struct crypto_ablkcipher *tfm)
		{
		crypto_free_ablkcipher(tfm);
		}
		EXPORT_SYMBOL(wcnss_wlan_crypto_free_ablkcipher);

		void wcnss_wlan_crypto_free_cipher(struct crypto_cipher *tfm)
		{
		crypto_free_cipher(tfm);
		}
		EXPORT_SYMBOL(wcnss_wlan_crypto_free_cipher);

		struct crypto_cipher *
		wcnss_wlan_crypto_alloc_cipher(const char *alg_name, u32 type, u32 mask)
		{
		return crypto_alloc_cipher(alg_name, type, mask);
		}
		EXPORT_SYMBOL(wcnss_wlan_crypto_alloc_cipher);

		static inline void xor_128(const u8 a, const u8 b, u8 *out)
		{
		u8 i;

		for (i = 0; i < AES_BLOCK_SIZE; i++)
		out[i] = a[i] ^ b[i];
		}

		static inline void leftshift_onebit(const u8 input, u8 output)
		{
		int i, overflow = 0;

		for (i = (AES_BLOCK_SIZE - 1); i >= 0; i--) {
		output[i] = input[i] << 1;
		output[i] \|= overflow;
		overflow = (input[i] & 0x80) ? 1 : 0;
		}
		}

		static void generate_subkey(struct crypto_cipher tfm, u8 k1, u8 *k2)
		{
		u8 l[AES_BLOCK_SIZE], tmp[AES_BLOCK_SIZE];
		u8 const_rb[AES_BLOCK_SIZE] = {
		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x87};
		u8 const_zero[AES_BLOCK_SIZE] = {
		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};

		crypto_cipher_encrypt_one(tfm, l, const_zero);

		if ((l[0] & 0x80) == 0) { /* If MSB(l) = 0, then k1 = l << 1 */
		leftshift_onebit(l, k1);
		} else { /* Else k1 = ( l << 1 ) (+) Rb */
		leftshift_onebit(l, tmp);
		xor_128(tmp, const_rb, k1);
		}

		if ((k1[0] & 0x80) == 0) {
		leftshift_onebit(k1, k2);
		} else {
		leftshift_onebit(k1, tmp);
		xor_128(tmp, const_rb, k2);
		}
		}

		static inline void padding(u8 lastb, u8 pad, u16 length)
		{
		u8 j;

		/* original last block */
		for (j = 0; j < AES_BLOCK_SIZE; j++) {
		if (j < length)
		pad[j] = lastb[j];
		else if (j == length)
		pad[j] = 0x80;
		else
		pad[j] = 0x00;
		}
		}

		void wcnss_wlan_cmac_calc_mic(struct crypto_cipher tfm, u8 m,
		u16 length, u8 *mac)
		{
		u8 x[AES_BLOCK_SIZE], y[AES_BLOCK_SIZE];
		u8 m_last[AES_BLOCK_SIZE], padded[AES_BLOCK_SIZE];
		u8 k1[AES_KEYSIZE_128], k2[AES_KEYSIZE_128];
		int cmpBlk;
		int i, nblocks = (length + 15) / AES_BLOCK_SIZE;

		generate_subkey(tfm, k1, k2);

		if (nblocks == 0) {
		nblocks = 1;
		cmpBlk = 0;
		} else {
		cmpBlk = ((length % AES_BLOCK_SIZE) == 0) ? 1 : 0;
		}

		if (cmpBlk) { /* Last block is complete block */
		xor_128(&m[AES_BLOCK_SIZE * (nblocks - 1)], k1, m_last);
		} else { /* Last block is not complete block */
		padding(&m[AES_BLOCK_SIZE * (nblocks - 1)], padded,
		length % AES_BLOCK_SIZE);
		xor_128(padded, k2, m_last);
		}

		for (i = 0; i < AES_BLOCK_SIZE; i++)
		x[i] = 0;

		for (i = 0; i < (nblocks - 1); i++) {
		xor_128(x, &m[AES_BLOCK_SIZE * i], y); /* y = Mi (+) x */
		crypto_cipher_encrypt_one(tfm, x, y); /* x = AES-128(KEY, y) */
		}

		xor_128(x, m_last, y);
		crypto_cipher_encrypt_one(tfm, x, y);

		memcpy(mac, x, CMAC_TLEN);
		}
		EXPORT_SYMBOL(wcnss_wlan_cmac_calc_mic);