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Diffstat (limited to 'crypto/xts.c')
-rw-r--r--crypto/xts.c68
1 files changed, 38 insertions, 30 deletions
diff --git a/crypto/xts.c b/crypto/xts.c
index 6c12f30dbdd6..3da8f5e053d6 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 {
@@ -99,7 +99,7 @@ static int xts_xor_tweak(struct skcipher_request *req, bool second_pass,
while (w.nbytes) {
unsigned int avail = w.nbytes;
- le128 *wsrc;
+ const le128 *wsrc;
le128 *wdst;
wsrc = w.src.virt.addr;
@@ -140,9 +140,9 @@ static int xts_xor_tweak_post(struct skcipher_request *req, bool enc)
return xts_xor_tweak(req, true, enc);
}
-static void xts_cts_done(struct crypto_async_request *areq, int err)
+static void xts_cts_done(void *data, int err)
{
- struct skcipher_request *req = areq->data;
+ struct skcipher_request *req = data;
le128 b;
if (!err) {
@@ -196,19 +196,19 @@ static int xts_cts_final(struct skcipher_request *req,
return 0;
}
-static void xts_encrypt_done(struct crypto_async_request *areq, int err)
+static void xts_encrypt_done(void *data, int err)
{
- struct skcipher_request *req = areq->data;
+ struct skcipher_request *req = data;
if (!err) {
struct xts_request_ctx *rctx = skcipher_request_ctx(req);
- rctx->subreq.base.flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
+ rctx->subreq.base.flags &= CRYPTO_TFM_REQ_MAY_BACKLOG;
err = xts_xor_tweak_post(req, true);
if (!err && unlikely(req->cryptlen % XTS_BLOCK_SIZE)) {
err = xts_cts_final(req, crypto_skcipher_encrypt);
- if (err == -EINPROGRESS)
+ if (err == -EINPROGRESS || err == -EBUSY)
return;
}
}
@@ -216,19 +216,19 @@ static void xts_encrypt_done(struct crypto_async_request *areq, int err)
skcipher_request_complete(req, err);
}
-static void xts_decrypt_done(struct crypto_async_request *areq, int err)
+static void xts_decrypt_done(void *data, int err)
{
- struct skcipher_request *req = areq->data;
+ struct skcipher_request *req = data;
if (!err) {
struct xts_request_ctx *rctx = skcipher_request_ctx(req);
- rctx->subreq.base.flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
+ rctx->subreq.base.flags &= CRYPTO_TFM_REQ_MAY_BACKLOG;
err = xts_xor_tweak_post(req, false);
if (!err && unlikely(req->cryptlen % XTS_BLOCK_SIZE)) {
err = xts_cts_final(req, crypto_skcipher_decrypt);
- if (err == -EINPROGRESS)
+ if (err == -EINPROGRESS || err == -EBUSY)
return;
}
}
@@ -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;
@@ -361,27 +363,27 @@ static int xts_create(struct crypto_template *tmpl, struct rtattr **tb)
err = crypto_grab_skcipher(&ctx->spawn, skcipher_crypto_instance(inst),
cipher_name, 0, mask);
- if (err == -ENOENT) {
+ if (err == -ENOENT && memcmp(cipher_name, "ecb(", 4)) {
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",
@@ -395,34 +397,39 @@ static int xts_create(struct crypto_template *tmpl, struct rtattr **tb)
/* Alas we screwed up the naming so we have to mangle the
* cipher name.
*/
- if (!strncmp(cipher_name, "ecb(", 4)) {
- unsigned len;
+ if (!memcmp(cipher_name, "ecb(", 4)) {
+ int len;
- len = strlcpy(ctx->name, cipher_name + 4, sizeof(ctx->name));
- if (len < 2 || len >= 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);
@@ -459,10 +466,11 @@ static void __exit xts_module_exit(void)
crypto_unregister_template(&xts_tmpl);
}
-subsys_initcall(xts_module_init);
+module_init(xts_module_init);
module_exit(xts_module_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("XTS block cipher mode");
MODULE_ALIAS_CRYPTO("xts");
-MODULE_IMPORT_NS(CRYPTO_INTERNAL);
+MODULE_IMPORT_NS("CRYPTO_INTERNAL");
+MODULE_SOFTDEP("pre: ecb");
generated by cgit (git 2.34.1) at 2025-12-24 20:43:28 +0000