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-rw-r--r--drivers/staging/rtl8192su/ieee80211/cipher.c299
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 1968acfe32b1..000000000000
--- 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);
-}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.