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-rw-r--r--crypto/blkcipher.c70
-rw-r--r--include/linux/crypto.h199
2 files changed, 260 insertions, 9 deletions
diff --git a/crypto/blkcipher.c b/crypto/blkcipher.c
index bf45917..8edf40c 100644
--- a/crypto/blkcipher.c
+++ b/crypto/blkcipher.c
@@ -349,13 +349,48 @@ static int setkey(struct crypto_tfm *tfm, const u8 *key,
return cipher->setkey(tfm, key, keylen);
}
+static int async_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ return setkey(crypto_ablkcipher_tfm(tfm), key, keylen);
+}
+
+static int async_encrypt(struct ablkcipher_request *req)
+{
+ struct crypto_tfm *tfm = req->base.tfm;
+ struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher;
+ struct blkcipher_desc desc = {
+ .tfm = __crypto_blkcipher_cast(tfm),
+ .info = req->info,
+ .flags = req->base.flags,
+ };
+
+
+ return alg->encrypt(&desc, req->dst, req->src, req->nbytes);
+}
+
+static int async_decrypt(struct ablkcipher_request *req)
+{
+ struct crypto_tfm *tfm = req->base.tfm;
+ struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher;
+ struct blkcipher_desc desc = {
+ .tfm = __crypto_blkcipher_cast(tfm),
+ .info = req->info,
+ .flags = req->base.flags,
+ };
+
+ return alg->decrypt(&desc, req->dst, req->src, req->nbytes);
+}
+
static unsigned int crypto_blkcipher_ctxsize(struct crypto_alg *alg, u32 type,
u32 mask)
{
struct blkcipher_alg *cipher = &alg->cra_blkcipher;
unsigned int len = alg->cra_ctxsize;
- if (cipher->ivsize) {
+ type ^= CRYPTO_ALG_ASYNC;
+ mask &= CRYPTO_ALG_ASYNC;
+ if ((type & mask) && cipher->ivsize) {
len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
len += cipher->ivsize;
}
@@ -363,16 +398,26 @@ static unsigned int crypto_blkcipher_ctxsize(struct crypto_alg *alg, u32 type,
return len;
}
-static int crypto_init_blkcipher_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
+static int crypto_init_blkcipher_ops_async(struct crypto_tfm *tfm)
+{
+ struct ablkcipher_tfm *crt = &tfm->crt_ablkcipher;
+ struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher;
+
+ crt->setkey = async_setkey;
+ crt->encrypt = async_encrypt;
+ crt->decrypt = async_decrypt;
+ crt->ivsize = alg->ivsize;
+
+ return 0;
+}
+
+static int crypto_init_blkcipher_ops_sync(struct crypto_tfm *tfm)
{
struct blkcipher_tfm *crt = &tfm->crt_blkcipher;
struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher;
unsigned long align = crypto_tfm_alg_alignmask(tfm) + 1;
unsigned long addr;
- if (alg->ivsize > PAGE_SIZE / 8)
- return -EINVAL;
-
crt->setkey = setkey;
crt->encrypt = alg->encrypt;
crt->decrypt = alg->decrypt;
@@ -385,6 +430,21 @@ static int crypto_init_blkcipher_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
return 0;
}
+static int crypto_init_blkcipher_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
+{
+ struct blkcipher_alg *alg = &tfm->__crt_alg->cra_blkcipher;
+
+ if (alg->ivsize > PAGE_SIZE / 8)
+ return -EINVAL;
+
+ type ^= CRYPTO_ALG_ASYNC;
+ mask &= CRYPTO_ALG_ASYNC;
+ if (type & mask)
+ return crypto_init_blkcipher_ops_sync(tfm);
+ else
+ return crypto_init_blkcipher_ops_async(tfm);
+}
+
static void crypto_blkcipher_show(struct seq_file *m, struct crypto_alg *alg)
__attribute__ ((unused));
static void crypto_blkcipher_show(struct seq_file *m, struct crypto_alg *alg)
diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index 779aa78..d4d0531 100644
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -56,6 +56,7 @@
#define CRYPTO_TFM_REQ_WEAK_KEY 0x00000100
#define CRYPTO_TFM_REQ_MAY_SLEEP 0x00000200
+#define CRYPTO_TFM_REQ_MAY_BACKLOG 0x00000400
#define CRYPTO_TFM_RES_WEAK_KEY 0x00100000
#define CRYPTO_TFM_RES_BAD_KEY_LEN 0x00200000
#define CRYPTO_TFM_RES_BAD_KEY_SCHED 0x00400000
@@ -88,11 +89,37 @@
#endif
struct scatterlist;
+struct crypto_ablkcipher;
+struct crypto_async_request;
struct crypto_blkcipher;
struct crypto_hash;
struct crypto_tfm;
struct crypto_type;
+typedef void (*crypto_completion_t)(struct crypto_async_request *req, int err);
+
+struct crypto_async_request {
+ struct list_head list;
+ crypto_completion_t complete;
+ void *data;
+ struct crypto_tfm *tfm;
+
+ u32 flags;
+};
+
+struct ablkcipher_request {
+ struct crypto_async_request base;
+
+ unsigned int nbytes;
+
+ void *info;
+
+ struct scatterlist *src;
+ struct scatterlist *dst;
+
+ void *__ctx[] CRYPTO_MINALIGN_ATTR;
+};
+
struct blkcipher_desc {
struct crypto_blkcipher *tfm;
void *info;
@@ -232,6 +259,15 @@ static inline int crypto_has_alg(const char *name, u32 type, u32 mask)
* crypto_free_*(), as well as the various helpers below.
*/
+struct ablkcipher_tfm {
+ int (*setkey)(struct crypto_ablkcipher *tfm, const u8 *key,
+ unsigned int keylen);
+ int (*encrypt)(struct ablkcipher_request *req);
+ int (*decrypt)(struct ablkcipher_request *req);
+ unsigned int ivsize;
+ unsigned int reqsize;
+};
+
struct blkcipher_tfm {
void *iv;
int (*setkey)(struct crypto_tfm *tfm, const u8 *key,
@@ -290,6 +326,7 @@ struct compress_tfm {
u8 *dst, unsigned int *dlen);
};
+#define crt_ablkcipher crt_u.ablkcipher
#define crt_blkcipher crt_u.blkcipher
#define crt_cipher crt_u.cipher
#define crt_hash crt_u.hash
@@ -300,6 +337,7 @@ struct crypto_tfm {
u32 crt_flags;
union {
+ struct ablkcipher_tfm ablkcipher;
struct blkcipher_tfm blkcipher;
struct cipher_tfm cipher;
struct hash_tfm hash;
@@ -311,6 +349,10 @@ struct crypto_tfm {
void *__crt_ctx[] CRYPTO_MINALIGN_ATTR;
};
+struct crypto_ablkcipher {
+ struct crypto_tfm base;
+};
+
struct crypto_blkcipher {
struct crypto_tfm base;
};
@@ -411,6 +453,155 @@ static inline unsigned int crypto_tfm_ctx_alignment(void)
/*
* API wrappers.
*/
+static inline struct crypto_ablkcipher *__crypto_ablkcipher_cast(
+ struct crypto_tfm *tfm)
+{
+ return (struct crypto_ablkcipher *)tfm;
+}
+
+static inline struct crypto_ablkcipher *crypto_alloc_ablkcipher(
+ const char *alg_name, u32 type, u32 mask)
+{
+ type &= ~CRYPTO_ALG_TYPE_MASK;
+ type |= CRYPTO_ALG_TYPE_BLKCIPHER;
+ mask |= CRYPTO_ALG_TYPE_MASK;
+
+ return __crypto_ablkcipher_cast(
+ crypto_alloc_base(alg_name, type, mask));
+}
+
+static inline struct crypto_tfm *crypto_ablkcipher_tfm(
+ struct crypto_ablkcipher *tfm)
+{
+ return &tfm->base;
+}
+
+static inline void crypto_free_ablkcipher(struct crypto_ablkcipher *tfm)
+{
+ crypto_free_tfm(crypto_ablkcipher_tfm(tfm));
+}
+
+static inline int crypto_has_ablkcipher(const char *alg_name, u32 type,
+ u32 mask)
+{
+ type &= ~CRYPTO_ALG_TYPE_MASK;
+ type |= CRYPTO_ALG_TYPE_BLKCIPHER;
+ mask |= CRYPTO_ALG_TYPE_MASK;
+
+ return crypto_has_alg(alg_name, type, mask);
+}
+
+static inline struct ablkcipher_tfm *crypto_ablkcipher_crt(
+ struct crypto_ablkcipher *tfm)
+{
+ return &crypto_ablkcipher_tfm(tfm)->crt_ablkcipher;
+}
+
+static inline unsigned int crypto_ablkcipher_ivsize(
+ struct crypto_ablkcipher *tfm)
+{
+ return crypto_ablkcipher_crt(tfm)->ivsize;
+}
+
+static inline unsigned int crypto_ablkcipher_blocksize(
+ struct crypto_ablkcipher *tfm)
+{
+ return crypto_tfm_alg_blocksize(crypto_ablkcipher_tfm(tfm));
+}
+
+static inline unsigned int crypto_ablkcipher_alignmask(
+ struct crypto_ablkcipher *tfm)
+{
+ return crypto_tfm_alg_alignmask(crypto_ablkcipher_tfm(tfm));
+}
+
+static inline u32 crypto_ablkcipher_get_flags(struct crypto_ablkcipher *tfm)
+{
+ return crypto_tfm_get_flags(crypto_ablkcipher_tfm(tfm));
+}
+
+static inline void crypto_ablkcipher_set_flags(struct crypto_ablkcipher *tfm,
+ u32 flags)
+{
+ crypto_tfm_set_flags(crypto_ablkcipher_tfm(tfm), flags);
+}
+
+static inline void crypto_ablkcipher_clear_flags(struct crypto_ablkcipher *tfm,
+ u32 flags)
+{
+ crypto_tfm_clear_flags(crypto_ablkcipher_tfm(tfm), flags);
+}
+
+static inline int crypto_ablkcipher_setkey(struct crypto_ablkcipher *tfm,
+ const u8 *key, unsigned int keylen)
+{
+ return crypto_ablkcipher_crt(tfm)->setkey(tfm, key, keylen);
+}
+
+static inline struct crypto_ablkcipher *crypto_ablkcipher_reqtfm(
+ struct ablkcipher_request *req)
+{
+ return __crypto_ablkcipher_cast(req->base.tfm);
+}
+
+static inline int crypto_ablkcipher_encrypt(struct ablkcipher_request *req)
+{
+ struct ablkcipher_tfm *crt =
+ crypto_ablkcipher_crt(crypto_ablkcipher_reqtfm(req));
+ return crt->encrypt(req);
+}
+
+static inline int crypto_ablkcipher_decrypt(struct ablkcipher_request *req)
+{
+ struct ablkcipher_tfm *crt =
+ crypto_ablkcipher_crt(crypto_ablkcipher_reqtfm(req));
+ return crt->decrypt(req);
+}
+
+static inline int crypto_ablkcipher_reqsize(struct crypto_ablkcipher *tfm)
+{
+ return crypto_ablkcipher_crt(tfm)->reqsize;
+}
+
+static inline struct ablkcipher_request *ablkcipher_request_alloc(
+ struct crypto_ablkcipher *tfm, gfp_t gfp)
+{
+ struct ablkcipher_request *req;
+
+ req = kmalloc(sizeof(struct ablkcipher_request) +
+ crypto_ablkcipher_reqsize(tfm), gfp);
+
+ if (likely(req))
+ req->base.tfm = crypto_ablkcipher_tfm(tfm);
+
+ return req;
+}
+
+static inline void ablkcipher_request_free(struct ablkcipher_request *req)
+{
+ kfree(req);
+}
+
+static inline void ablkcipher_request_set_callback(
+ struct ablkcipher_request *req,
+ u32 flags, crypto_completion_t complete, void *data)
+{
+ req->base.complete = complete;
+ req->base.data = data;
+ req->base.flags = flags;
+}
+
+static inline void ablkcipher_request_set_crypt(
+ struct ablkcipher_request *req,
+ struct scatterlist *src, struct scatterlist *dst,
+ unsigned int nbytes, void *iv)
+{
+ req->src = src;
+ req->dst = dst;
+ req->nbytes = nbytes;
+ req->info = iv;
+}
+
static inline struct crypto_blkcipher *__crypto_blkcipher_cast(
struct crypto_tfm *tfm)
{
@@ -427,9 +618,9 @@ static inline struct crypto_blkcipher *crypto_blkcipher_cast(
static inline struct crypto_blkcipher *crypto_alloc_blkcipher(
const char *alg_name, u32 type, u32 mask)
{
- type &= ~CRYPTO_ALG_TYPE_MASK;
+ type &= ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);
type |= CRYPTO_ALG_TYPE_BLKCIPHER;
- mask |= CRYPTO_ALG_TYPE_MASK;
+ mask |= CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC;
return __crypto_blkcipher_cast(crypto_alloc_base(alg_name, type, mask));
}
@@ -447,9 +638,9 @@ static inline void crypto_free_blkcipher(struct crypto_blkcipher *tfm)
static inline int crypto_has_blkcipher(const char *alg_name, u32 type, u32 mask)
{
- type &= ~CRYPTO_ALG_TYPE_MASK;
+ type &= ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC);
type |= CRYPTO_ALG_TYPE_BLKCIPHER;
- mask |= CRYPTO_ALG_TYPE_MASK;
+ mask |= CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC;
return crypto_has_alg(alg_name, type, mask);
}
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