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crypto: x86/des - switch to library interface 

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ard Biesheuvel 2019-08-15 12:01:10 +03:00 committed by Herbert Xu
parent 04007b0e6c
commit cc1d24b980
1 changed files with 23 additions and 19 deletions
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42
arch/x86/crypto/des3_ede_glue.c
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@ -11,7 +11,7 @@
*/
#include <crypto/algapi.h>
#include <crypto/internal/des.h>
#include <crypto/des.h>
#include <crypto/internal/skcipher.h>
#include <linux/crypto.h>
#include <linux/init.h>
@ -19,8 +19,8 @@
#include <linux/types.h>
struct des3_ede_x86_ctx {
u32 enc_expkey[DES3_EDE_EXPKEY_WORDS];
u32 dec_expkey[DES3_EDE_EXPKEY_WORDS];
struct des3_ede_ctx enc;
struct des3_ede_ctx dec;
};
/* regular block cipher functions */
@ -34,7 +34,7 @@ asmlinkage void des3_ede_x86_64_crypt_blk_3way(const u32 *expkey, u8 *dst,
static inline void des3_ede_enc_blk(struct des3_ede_x86_ctx *ctx, u8 *dst,
const u8 *src)
{
u32 *enc_ctx = ctx->enc_expkey;
u32 *enc_ctx = ctx->enc.expkey;
des3_ede_x86_64_crypt_blk(enc_ctx, dst, src);
}
@ -42,7 +42,7 @@ static inline void des3_ede_enc_blk(struct des3_ede_x86_ctx *ctx, u8 *dst,
static inline void des3_ede_dec_blk(struct des3_ede_x86_ctx *ctx, u8 *dst,
const u8 *src)
{
u32 *dec_ctx = ctx->dec_expkey;
u32 *dec_ctx = ctx->dec.expkey;
des3_ede_x86_64_crypt_blk(dec_ctx, dst, src);
}
@ -50,7 +50,7 @@ static inline void des3_ede_dec_blk(struct des3_ede_x86_ctx *ctx, u8 *dst,
static inline void des3_ede_enc_blk_3way(struct des3_ede_x86_ctx *ctx, u8 *dst,
const u8 *src)
{
u32 *enc_ctx = ctx->enc_expkey;
u32 *enc_ctx = ctx->enc.expkey;
des3_ede_x86_64_crypt_blk_3way(enc_ctx, dst, src);
}
@ -58,7 +58,7 @@ static inline void des3_ede_enc_blk_3way(struct des3_ede_x86_ctx *ctx, u8 *dst,
static inline void des3_ede_dec_blk_3way(struct des3_ede_x86_ctx *ctx, u8 *dst,
const u8 *src)
{
u32 *dec_ctx = ctx->dec_expkey;
u32 *dec_ctx = ctx->dec.expkey;
des3_ede_x86_64_crypt_blk_3way(dec_ctx, dst, src);
}
@ -122,7 +122,7 @@ static int ecb_encrypt(struct skcipher_request *req)
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct des3_ede_x86_ctx *ctx = crypto_skcipher_ctx(tfm);
return ecb_crypt(req, ctx->enc_expkey);
return ecb_crypt(req, ctx->enc.expkey);
}
static int ecb_decrypt(struct skcipher_request *req)
@ -130,7 +130,7 @@ static int ecb_decrypt(struct skcipher_request *req)
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
struct des3_ede_x86_ctx *ctx = crypto_skcipher_ctx(tfm);
return ecb_crypt(req, ctx->dec_expkey);
return ecb_crypt(req, ctx->dec.expkey);
}
static unsigned int __cbc_encrypt(struct des3_ede_x86_ctx *ctx,
@ -348,24 +348,28 @@ static int des3_ede_x86_setkey(struct crypto_tfm *tfm, const u8 *key,
u32 i, j, tmp;
int err;
err = crypto_des3_ede_verify_key(tfm, key);
if (err)
return err;
err = des3_ede_expand_key(&ctx->enc, key, keylen);
if (err == -ENOKEY) {
if (crypto_tfm_get_flags(tfm) & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS)
err = -EINVAL;
else
err = 0;
}
/* Generate encryption context using generic implementation. */
err = __des3_ede_setkey(ctx->enc_expkey, &tfm->crt_flags, key, keylen);
if (err < 0)
if (err) {
memset(ctx, 0, sizeof(*ctx));
return err;
}
/* Fix encryption context for this implementation and form decryption
* context. */
j = DES3_EDE_EXPKEY_WORDS - 2;
for (i = 0; i < DES3_EDE_EXPKEY_WORDS; i += 2, j -= 2) {
tmp = ror32(ctx->enc_expkey[i + 1], 4);
ctx->enc_expkey[i + 1] = tmp;
tmp = ror32(ctx->enc.expkey[i + 1], 4);
ctx->enc.expkey[i + 1] = tmp;
ctx->dec_expkey[j + 0] = ctx->enc_expkey[i + 0];
ctx->dec_expkey[j + 1] = tmp;
ctx->dec.expkey[j + 0] = ctx->enc.expkey[i + 0];
ctx->dec.expkey[j + 1] = tmp;
}
return 0;