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Diffstat (limited to 'crypto/xts.c')
-rw-r--r--crypto/xts.c33
1 files changed, 20 insertions, 13 deletions
diff --git a/crypto/xts.c b/crypto/xts.c
index 548b302c6c6a..672e1a3f0b0c 100644
--- a/crypto/xts.c
+++ b/crypto/xts.c
@@ -28,7 +28,7 @@ struct xts_tfm_ctx {
struct xts_instance_ctx {
struct crypto_skcipher_spawn spawn;
- char name[CRYPTO_MAX_ALG_NAME];
+ struct crypto_cipher_spawn tweak_spawn;
};
struct xts_request_ctx {
@@ -306,7 +306,7 @@ static int xts_init_tfm(struct crypto_skcipher *tfm)
ctx->child = child;
- tweak = crypto_alloc_cipher(ictx->name, 0, 0);
+ tweak = crypto_spawn_cipher(&ictx->tweak_spawn);
if (IS_ERR(tweak)) {
crypto_free_skcipher(ctx->child);
return PTR_ERR(tweak);
@@ -333,14 +333,16 @@ static void xts_free_instance(struct skcipher_instance *inst)
struct xts_instance_ctx *ictx = skcipher_instance_ctx(inst);
crypto_drop_skcipher(&ictx->spawn);
+ crypto_drop_cipher(&ictx->tweak_spawn);
kfree(inst);
}
static int xts_create(struct crypto_template *tmpl, struct rtattr **tb)
{
+ struct skcipher_alg_common *alg;
+ char name[CRYPTO_MAX_ALG_NAME];
struct skcipher_instance *inst;
struct xts_instance_ctx *ctx;
- struct skcipher_alg *alg;
const char *cipher_name;
u32 mask;
int err;
@@ -363,25 +365,25 @@ static int xts_create(struct crypto_template *tmpl, struct rtattr **tb)
cipher_name, 0, mask);
if (err == -ENOENT) {
err = -ENAMETOOLONG;
- if (snprintf(ctx->name, CRYPTO_MAX_ALG_NAME, "ecb(%s)",
+ if (snprintf(name, CRYPTO_MAX_ALG_NAME, "ecb(%s)",
cipher_name) >= CRYPTO_MAX_ALG_NAME)
goto err_free_inst;
err = crypto_grab_skcipher(&ctx->spawn,
skcipher_crypto_instance(inst),
- ctx->name, 0, mask);
+ name, 0, mask);
}
if (err)
goto err_free_inst;
- alg = crypto_skcipher_spawn_alg(&ctx->spawn);
+ alg = crypto_spawn_skcipher_alg_common(&ctx->spawn);
err = -EINVAL;
if (alg->base.cra_blocksize != XTS_BLOCK_SIZE)
goto err_free_inst;
- if (crypto_skcipher_alg_ivsize(alg))
+ if (alg->ivsize)
goto err_free_inst;
err = crypto_inst_setname(skcipher_crypto_instance(inst), "xts",
@@ -398,31 +400,36 @@ static int xts_create(struct crypto_template *tmpl, struct rtattr **tb)
if (!strncmp(cipher_name, "ecb(", 4)) {
int len;
- len = strscpy(ctx->name, cipher_name + 4, sizeof(ctx->name));
+ len = strscpy(name, cipher_name + 4, sizeof(name));
if (len < 2)
goto err_free_inst;
- if (ctx->name[len - 1] != ')')
+ if (name[len - 1] != ')')
goto err_free_inst;
- ctx->name[len - 1] = 0;
+ name[len - 1] = 0;
if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME,
- "xts(%s)", ctx->name) >= CRYPTO_MAX_ALG_NAME) {
+ "xts(%s)", name) >= CRYPTO_MAX_ALG_NAME) {
err = -ENAMETOOLONG;
goto err_free_inst;
}
} else
goto err_free_inst;
+ err = crypto_grab_cipher(&ctx->tweak_spawn,
+ skcipher_crypto_instance(inst), name, 0, mask);
+ if (err)
+ goto err_free_inst;
+
inst->alg.base.cra_priority = alg->base.cra_priority;
inst->alg.base.cra_blocksize = XTS_BLOCK_SIZE;
inst->alg.base.cra_alignmask = alg->base.cra_alignmask |
(__alignof__(u64) - 1);
inst->alg.ivsize = XTS_BLOCK_SIZE;
- inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg) * 2;
- inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg) * 2;
+ inst->alg.min_keysize = alg->min_keysize * 2;
+ inst->alg.max_keysize = alg->max_keysize * 2;
inst->alg.base.cra_ctxsize = sizeof(struct xts_tfm_ctx);