diff options
author | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-09-22 19:54:53 (GMT) |
---|---|---|
committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-09-22 20:01:40 (GMT) |
commit | ae19ffbadc1b2100285a5b5b3d0a4e0a11390904 (patch) | |
tree | 3c2086ab67398a019089a47ca3f362a4bc6db74f /drivers/staging/rtl8192su/ieee80211/cipher.c | |
parent | 34e84f39a27d059a3e6ec6e8b94aafa702e6f220 (diff) | |
parent | 9173a8ef24a6b1b8031507b35b8ffe5f85a87692 (diff) | |
download | linux-fsl-qoriq-ae19ffbadc1b2100285a5b5b3d0a4e0a11390904.tar.xz |
Merge branch 'master' into for-linus
Diffstat (limited to 'drivers/staging/rtl8192su/ieee80211/cipher.c')
-rw-r--r-- | drivers/staging/rtl8192su/ieee80211/cipher.c | 299 |
1 files changed, 0 insertions, 299 deletions
diff --git a/drivers/staging/rtl8192su/ieee80211/cipher.c b/drivers/staging/rtl8192su/ieee80211/cipher.c deleted file mode 100644 index 1968acf..0000000 --- a/drivers/staging/rtl8192su/ieee80211/cipher.c +++ /dev/null @@ -1,299 +0,0 @@ -/* - * Cryptographic API. - * - * Cipher operations. - * - * 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 <linux/kernel.h> -//#include <linux/crypto.h> -#include "rtl_crypto.h" -#include <linux/errno.h> -#include <linux/mm.h> -#include <linux/slab.h> -#include <asm/scatterlist.h> -#include "internal.h" -#include "scatterwalk.h" - -typedef void (cryptfn_t)(void *, u8 *, const u8 *); -typedef void (procfn_t)(struct crypto_tfm *, u8 *, - u8*, cryptfn_t, int enc, void *, int); - -static inline void xor_64(u8 *a, const u8 *b) -{ - ((u32 *)a)[0] ^= ((u32 *)b)[0]; - ((u32 *)a)[1] ^= ((u32 *)b)[1]; -} - -static inline void xor_128(u8 *a, const u8 *b) -{ - ((u32 *)a)[0] ^= ((u32 *)b)[0]; - ((u32 *)a)[1] ^= ((u32 *)b)[1]; - ((u32 *)a)[2] ^= ((u32 *)b)[2]; - ((u32 *)a)[3] ^= ((u32 *)b)[3]; -} - - -/* - * Generic encrypt/decrypt wrapper for ciphers, handles operations across - * multiple page boundaries by using temporary blocks. In user context, - * the kernel is given a chance to schedule us once per block. - */ -static int crypt(struct crypto_tfm *tfm, - struct scatterlist *dst, - struct scatterlist *src, - unsigned int nbytes, cryptfn_t crfn, - procfn_t prfn, int enc, void *info) -{ - struct scatter_walk walk_in, walk_out; - const unsigned int bsize = crypto_tfm_alg_blocksize(tfm); - u8 tmp_src[bsize]; - u8 tmp_dst[bsize]; - - if (!nbytes) - return 0; - - if (nbytes % bsize) { - tfm->crt_flags |= CRYPTO_TFM_RES_BAD_BLOCK_LEN; - return -EINVAL; - } - - scatterwalk_start(&walk_in, src); - scatterwalk_start(&walk_out, dst); - - for(;;) { - u8 *src_p, *dst_p; - int in_place; - - scatterwalk_map(&walk_in, 0); - scatterwalk_map(&walk_out, 1); - src_p = scatterwalk_whichbuf(&walk_in, bsize, tmp_src); - dst_p = scatterwalk_whichbuf(&walk_out, bsize, tmp_dst); - in_place = scatterwalk_samebuf(&walk_in, &walk_out, - src_p, dst_p); - - nbytes -= bsize; - - scatterwalk_copychunks(src_p, &walk_in, bsize, 0); - - prfn(tfm, dst_p, src_p, crfn, enc, info, in_place); - - scatterwalk_done(&walk_in, 0, nbytes); - - scatterwalk_copychunks(dst_p, &walk_out, bsize, 1); - scatterwalk_done(&walk_out, 1, nbytes); - - if (!nbytes) - return 0; - - crypto_yield(tfm); - } -} - -static void cbc_process(struct crypto_tfm *tfm, u8 *dst, u8 *src, - cryptfn_t fn, int enc, void *info, int in_place) -{ - u8 *iv = info; - - /* Null encryption */ - if (!iv) - return; - - if (enc) { - tfm->crt_u.cipher.cit_xor_block(iv, src); - fn(crypto_tfm_ctx(tfm), dst, iv); - memcpy(iv, dst, crypto_tfm_alg_blocksize(tfm)); - } else { - u8 stack[in_place ? crypto_tfm_alg_blocksize(tfm) : 0]; - u8 *buf = in_place ? stack : dst; - - fn(crypto_tfm_ctx(tfm), buf, src); - tfm->crt_u.cipher.cit_xor_block(buf, iv); - memcpy(iv, src, crypto_tfm_alg_blocksize(tfm)); - if (buf != dst) - memcpy(dst, buf, crypto_tfm_alg_blocksize(tfm)); - } -} - -static void ecb_process(struct crypto_tfm *tfm, u8 *dst, u8 *src, - cryptfn_t fn, int enc, void *info, int in_place) -{ - fn(crypto_tfm_ctx(tfm), dst, src); -} - -static int setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen) -{ - struct cipher_alg *cia = &tfm->__crt_alg->cra_cipher; - - if (keylen < cia->cia_min_keysize || keylen > cia->cia_max_keysize) { - tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; - return -EINVAL; - } else - return cia->cia_setkey(crypto_tfm_ctx(tfm), key, keylen, - &tfm->crt_flags); -} - -static int ecb_encrypt(struct crypto_tfm *tfm, - struct scatterlist *dst, - struct scatterlist *src, unsigned int nbytes) -{ - return crypt(tfm, dst, src, nbytes, - tfm->__crt_alg->cra_cipher.cia_encrypt, - ecb_process, 1, NULL); -} - -static int ecb_decrypt(struct crypto_tfm *tfm, - struct scatterlist *dst, - struct scatterlist *src, - unsigned int nbytes) -{ - return crypt(tfm, dst, src, nbytes, - tfm->__crt_alg->cra_cipher.cia_decrypt, - ecb_process, 1, NULL); -} - -static int cbc_encrypt(struct crypto_tfm *tfm, - struct scatterlist *dst, - struct scatterlist *src, - unsigned int nbytes) -{ - return crypt(tfm, dst, src, nbytes, - tfm->__crt_alg->cra_cipher.cia_encrypt, - cbc_process, 1, tfm->crt_cipher.cit_iv); -} - -static int cbc_encrypt_iv(struct crypto_tfm *tfm, - struct scatterlist *dst, - struct scatterlist *src, - unsigned int nbytes, u8 *iv) -{ - return crypt(tfm, dst, src, nbytes, - tfm->__crt_alg->cra_cipher.cia_encrypt, - cbc_process, 1, iv); -} - -static int cbc_decrypt(struct crypto_tfm *tfm, - struct scatterlist *dst, - struct scatterlist *src, - unsigned int nbytes) -{ - return crypt(tfm, dst, src, nbytes, - tfm->__crt_alg->cra_cipher.cia_decrypt, - cbc_process, 0, tfm->crt_cipher.cit_iv); -} - -static int cbc_decrypt_iv(struct crypto_tfm *tfm, - struct scatterlist *dst, - struct scatterlist *src, - unsigned int nbytes, u8 *iv) -{ - return crypt(tfm, dst, src, nbytes, - tfm->__crt_alg->cra_cipher.cia_decrypt, - cbc_process, 0, iv); -} - -static int nocrypt(struct crypto_tfm *tfm, - struct scatterlist *dst, - struct scatterlist *src, - unsigned int nbytes) -{ - return -ENOSYS; -} - -static int nocrypt_iv(struct crypto_tfm *tfm, - struct scatterlist *dst, - struct scatterlist *src, - unsigned int nbytes, u8 *iv) -{ - return -ENOSYS; -} - -int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags) -{ - u32 mode = flags & CRYPTO_TFM_MODE_MASK; - - tfm->crt_cipher.cit_mode = mode ? mode : CRYPTO_TFM_MODE_ECB; - if (flags & CRYPTO_TFM_REQ_WEAK_KEY) - tfm->crt_flags = CRYPTO_TFM_REQ_WEAK_KEY; - - return 0; -} - -int crypto_init_cipher_ops(struct crypto_tfm *tfm) -{ - int ret = 0; - struct cipher_tfm *ops = &tfm->crt_cipher; - - ops->cit_setkey = setkey; - - switch (tfm->crt_cipher.cit_mode) { - case CRYPTO_TFM_MODE_ECB: - ops->cit_encrypt = ecb_encrypt; - ops->cit_decrypt = ecb_decrypt; - break; - - case CRYPTO_TFM_MODE_CBC: - ops->cit_encrypt = cbc_encrypt; - ops->cit_decrypt = cbc_decrypt; - ops->cit_encrypt_iv = cbc_encrypt_iv; - ops->cit_decrypt_iv = cbc_decrypt_iv; - break; - - case CRYPTO_TFM_MODE_CFB: - ops->cit_encrypt = nocrypt; - ops->cit_decrypt = nocrypt; - ops->cit_encrypt_iv = nocrypt_iv; - ops->cit_decrypt_iv = nocrypt_iv; - break; - - case CRYPTO_TFM_MODE_CTR: - ops->cit_encrypt = nocrypt; - ops->cit_decrypt = nocrypt; - ops->cit_encrypt_iv = nocrypt_iv; - ops->cit_decrypt_iv = nocrypt_iv; - break; - - default: - BUG(); - } - - if (ops->cit_mode == CRYPTO_TFM_MODE_CBC) { - - switch (crypto_tfm_alg_blocksize(tfm)) { - case 8: - ops->cit_xor_block = xor_64; - break; - - case 16: - ops->cit_xor_block = xor_128; - break; - - default: - printk(KERN_WARNING "%s: block size %u not supported\n", - crypto_tfm_alg_name(tfm), - crypto_tfm_alg_blocksize(tfm)); - ret = -EINVAL; - goto out; - } - - ops->cit_ivsize = crypto_tfm_alg_blocksize(tfm); - ops->cit_iv = kmalloc(ops->cit_ivsize, GFP_KERNEL); - if (ops->cit_iv == NULL) - ret = -ENOMEM; - } - -out: - return ret; -} - -void crypto_exit_cipher_ops(struct crypto_tfm *tfm) -{ - if (tfm->crt_cipher.cit_iv) - kfree(tfm->crt_cipher.cit_iv); -} |