Release 4.7 crypto/cipher.c
/*
* Cryptographic API.
*
* Cipher operations.
*
* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
* Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.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 <linux/errno.h>
#include <linux/slab.h>
#include <linux/string.h>
#include "internal.h"
static int setkey_unaligned(struct crypto_tfm *tfm, const u8 *key,
unsigned int keylen)
{
struct cipher_alg *cia = &tfm->__crt_alg->cra_cipher;
unsigned long alignmask = crypto_tfm_alg_alignmask(tfm);
int ret;
u8 *buffer, *alignbuffer;
unsigned long absize;
absize = keylen + alignmask;
buffer = kmalloc(absize, GFP_ATOMIC);
if (!buffer)
return -ENOMEM;
alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
memcpy(alignbuffer, key, keylen);
ret = cia->cia_setkey(tfm, alignbuffer, keylen);
memset(alignbuffer, 0, keylen);
kfree(buffer);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| sebastian siewior | sebastian siewior | 136 | 99.27% | 1 | 50.00% |
| sebastian andrzej siewior | sebastian andrzej siewior | 1 | 0.73% | 1 | 50.00% |
| Total | 137 | 100.00% | 2 | 100.00% |
static int setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
{
struct cipher_alg *cia = &tfm->__crt_alg->cra_cipher;
unsigned long alignmask = crypto_tfm_alg_alignmask(tfm);
tfm->crt_flags &= ~CRYPTO_TFM_RES_MASK;
if (keylen < cia->cia_min_keysize || keylen > cia->cia_max_keysize) {
tfm->crt_flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
return -EINVAL;
}
if ((unsigned long)key & alignmask)
return setkey_unaligned(tfm, key, keylen);
return cia->cia_setkey(tfm, key, keylen);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| herbert xu | herbert xu | 52 | 49.06% | 1 | 25.00% |
| sebastian siewior | sebastian siewior | 29 | 27.36% | 1 | 25.00% |
| james morris | james morris | 25 | 23.58% | 2 | 50.00% |
| Total | 106 | 100.00% | 4 | 100.00% |
static void cipher_crypt_unaligned(void (*fn)(struct crypto_tfm *, u8 *,
const u8 *),
struct crypto_tfm *tfm,
u8 *dst, const u8 *src)
{
unsigned long alignmask = crypto_tfm_alg_alignmask(tfm);
unsigned int size = crypto_tfm_alg_blocksize(tfm);
u8 buffer[size + alignmask];
u8 *tmp = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
memcpy(tmp, src, size);
fn(tfm, tmp, tmp);
memcpy(dst, tmp, size);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| herbert xu | herbert xu | 112 | 100.00% | 1 | 100.00% |
| Total | 112 | 100.00% | 1 | 100.00% |
static void cipher_encrypt_unaligned(struct crypto_tfm *tfm,
u8 *dst, const u8 *src)
{
unsigned long alignmask = crypto_tfm_alg_alignmask(tfm);
struct cipher_alg *cipher = &tfm->__crt_alg->cra_cipher;
if (unlikely(((unsigned long)dst | (unsigned long)src) & alignmask)) {
cipher_crypt_unaligned(cipher->cia_encrypt, tfm, dst, src);
return;
}
cipher->cia_encrypt(tfm, dst, src);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| herbert xu | herbert xu | 89 | 100.00% | 1 | 100.00% |
| Total | 89 | 100.00% | 1 | 100.00% |
static void cipher_decrypt_unaligned(struct crypto_tfm *tfm,
u8 *dst, const u8 *src)
{
unsigned long alignmask = crypto_tfm_alg_alignmask(tfm);
struct cipher_alg *cipher = &tfm->__crt_alg->cra_cipher;
if (unlikely(((unsigned long)dst | (unsigned long)src) & alignmask)) {
cipher_crypt_unaligned(cipher->cia_decrypt, tfm, dst, src);
return;
}
cipher->cia_decrypt(tfm, dst, src);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| herbert xu | herbert xu | 89 | 100.00% | 1 | 100.00% |
| Total | 89 | 100.00% | 1 | 100.00% |
int crypto_init_cipher_ops(struct crypto_tfm *tfm)
{
struct cipher_tfm *ops = &tfm->crt_cipher;
struct cipher_alg *cipher = &tfm->__crt_alg->cra_cipher;
ops->cit_setkey = setkey;
ops->cit_encrypt_one = crypto_tfm_alg_alignmask(tfm) ?
cipher_encrypt_unaligned : cipher->cia_encrypt;
ops->cit_decrypt_one = crypto_tfm_alg_alignmask(tfm) ?
cipher_decrypt_unaligned : cipher->cia_decrypt;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| herbert xu | herbert xu | 43 | 60.56% | 2 | 50.00% |
| james morris | james morris | 28 | 39.44% | 2 | 50.00% |
| Total | 71 | 100.00% | 4 | 100.00% |
void crypto_exit_cipher_ops(struct crypto_tfm *tfm)
{
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| james morris | james morris | 8 | 88.89% | 1 | 50.00% |
| herbert xu | herbert xu | 1 | 11.11% | 1 | 50.00% |
| Total | 9 | 100.00% | 2 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| herbert xu | herbert xu | 391 | 61.87% | 5 | 38.46% |
| sebastian siewior | sebastian siewior | 165 | 26.11% | 1 | 7.69% |
| james morris | james morris | 73 | 11.55% | 4 | 30.77% |
| david s. miller | david s. miller | 1 | 0.16% | 1 | 7.69% |
| sebastian andrzej siewior | sebastian andrzej siewior | 1 | 0.16% | 1 | 7.69% |
| richard hartmann | richard hartmann | 1 | 0.16% | 1 | 7.69% |
| Total | 632 | 100.00% | 13 | 100.00% |
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