return 0;
}
-static int shash_compat_setkey(struct crypto_hash *tfm, const u8 *key,
- unsigned int keylen)
-{
- struct shash_desc **descp = crypto_hash_ctx(tfm);
- struct shash_desc *desc = *descp;
-
- return crypto_shash_setkey(desc->tfm, key, keylen);
-}
-
-static int shash_compat_init(struct hash_desc *hdesc)
-{
- struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm);
- struct shash_desc *desc = *descp;
-
- desc->flags = hdesc->flags;
-
- return crypto_shash_init(desc);
-}
-
-static int shash_compat_update(struct hash_desc *hdesc, struct scatterlist *sg,
- unsigned int len)
-{
- struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm);
- struct shash_desc *desc = *descp;
- struct crypto_hash_walk walk;
- int nbytes;
-
- for (nbytes = crypto_hash_walk_first_compat(hdesc, &walk, sg, len);
- nbytes > 0; nbytes = crypto_hash_walk_done(&walk, nbytes))
- nbytes = crypto_shash_update(desc, walk.data, nbytes);
-
- return nbytes;
-}
-
-static int shash_compat_final(struct hash_desc *hdesc, u8 *out)
-{
- struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm);
-
- return crypto_shash_final(*descp, out);
-}
-
-static int shash_compat_digest(struct hash_desc *hdesc, struct scatterlist *sg,
- unsigned int nbytes, u8 *out)
-{
- unsigned int offset = sg->offset;
- int err;
-
- if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) {
- struct shash_desc **descp = crypto_hash_ctx(hdesc->tfm);
- struct shash_desc *desc = *descp;
- void *data;
-
- desc->flags = hdesc->flags;
-
- data = kmap_atomic(sg_page(sg));
- err = crypto_shash_digest(desc, data + offset, nbytes, out);
- kunmap_atomic(data);
- crypto_yield(desc->flags);
- goto out;
- }
-
- err = shash_compat_init(hdesc);
- if (err)
- goto out;
-
- err = shash_compat_update(hdesc, sg, nbytes);
- if (err)
- goto out;
-
- err = shash_compat_final(hdesc, out);
-
-out:
- return err;
-}
-
-static void crypto_exit_shash_ops_compat(struct crypto_tfm *tfm)
-{
- struct shash_desc **descp = crypto_tfm_ctx(tfm);
- struct shash_desc *desc = *descp;
-
- crypto_free_shash(desc->tfm);
- kzfree(desc);
-}
-
-static int crypto_init_shash_ops_compat(struct crypto_tfm *tfm)
-{
- struct hash_tfm *crt = &tfm->crt_hash;
- struct crypto_alg *calg = tfm->__crt_alg;
- struct shash_alg *alg = __crypto_shash_alg(calg);
- struct shash_desc **descp = crypto_tfm_ctx(tfm);
- struct crypto_shash *shash;
- struct shash_desc *desc;
-
- if (!crypto_mod_get(calg))
- return -EAGAIN;
-
- shash = crypto_create_tfm(calg, &crypto_shash_type);
- if (IS_ERR(shash)) {
- crypto_mod_put(calg);
- return PTR_ERR(shash);
- }
-
- desc = kmalloc(sizeof(*desc) + crypto_shash_descsize(shash),
- GFP_KERNEL);
- if (!desc) {
- crypto_free_shash(shash);
- return -ENOMEM;
- }
-
- *descp = desc;
- desc->tfm = shash;
- tfm->exit = crypto_exit_shash_ops_compat;
-
- crt->init = shash_compat_init;
- crt->update = shash_compat_update;
- crt->final = shash_compat_final;
- crt->digest = shash_compat_digest;
- crt->setkey = shash_compat_setkey;
-
- crt->digestsize = alg->digestsize;
-
- return 0;
-}
-
-static int crypto_init_shash_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
-{
- switch (mask & CRYPTO_ALG_TYPE_MASK) {
- case CRYPTO_ALG_TYPE_HASH_MASK:
- return crypto_init_shash_ops_compat(tfm);
- }
-
- return -EINVAL;
-}
-
-static unsigned int crypto_shash_ctxsize(struct crypto_alg *alg, u32 type,
- u32 mask)
-{
- switch (mask & CRYPTO_ALG_TYPE_MASK) {
- case CRYPTO_ALG_TYPE_HASH_MASK:
- return sizeof(struct shash_desc *);
- }
-
- return 0;
-}
-
static int crypto_shash_init_tfm(struct crypto_tfm *tfm)
{
struct crypto_shash *hash = __crypto_shash_cast(tfm);
}
static const struct crypto_type crypto_shash_type = {
- .ctxsize = crypto_shash_ctxsize,
.extsize = crypto_alg_extsize,
- .init = crypto_init_shash_ops,
.init_tfm = crypto_shash_init_tfm,
#ifdef CONFIG_PROC_FS
.show = crypto_shash_show,
struct crypto_ablkcipher;
struct crypto_async_request;
struct crypto_blkcipher;
-struct crypto_hash;
struct crypto_tfm;
struct crypto_type;
struct skcipher_givcrypt_request;
void *info;
};
-struct hash_desc {
- struct crypto_hash *tfm;
- u32 flags;
-};
-
/**
* DOC: Block Cipher Algorithm Definitions
*
void (*cit_decrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
};
-struct hash_tfm {
- int (*init)(struct hash_desc *desc);
- int (*update)(struct hash_desc *desc,
- struct scatterlist *sg, unsigned int nsg);
- int (*final)(struct hash_desc *desc, u8 *out);
- int (*digest)(struct hash_desc *desc, struct scatterlist *sg,
- unsigned int nsg, u8 *out);
- int (*setkey)(struct crypto_hash *tfm, const u8 *key,
- unsigned int keylen);
- unsigned int digestsize;
-};
-
struct compress_tfm {
int (*cot_compress)(struct crypto_tfm *tfm,
const u8 *src, unsigned int slen,
#define crt_ablkcipher crt_u.ablkcipher
#define crt_blkcipher crt_u.blkcipher
#define crt_cipher crt_u.cipher
-#define crt_hash crt_u.hash
#define crt_compress crt_u.compress
struct crypto_tfm {
struct ablkcipher_tfm ablkcipher;
struct blkcipher_tfm blkcipher;
struct cipher_tfm cipher;
- struct hash_tfm hash;
struct compress_tfm compress;
} crt_u;
struct crypto_tfm base;
};
-struct crypto_hash {
- struct crypto_tfm base;
-};
-
enum {
CRYPTOA_UNSPEC,
CRYPTOA_ALG,
dst, src);
}
-/**
- * DOC: Synchronous Message Digest API
- *
- * The synchronous message digest API is used with the ciphers of type
- * CRYPTO_ALG_TYPE_HASH (listed as type "hash" in /proc/crypto)
- */
-
-static inline struct crypto_hash *__crypto_hash_cast(struct crypto_tfm *tfm)
-{
- return (struct crypto_hash *)tfm;
-}
-
-static inline struct crypto_hash *crypto_hash_cast(struct crypto_tfm *tfm)
-{
- BUG_ON((crypto_tfm_alg_type(tfm) ^ CRYPTO_ALG_TYPE_HASH) &
- CRYPTO_ALG_TYPE_HASH_MASK);
- return __crypto_hash_cast(tfm);
-}
-
-/**
- * crypto_alloc_hash() - allocate synchronous message digest handle
- * @alg_name: is the cra_name / name or cra_driver_name / driver name of the
- * message digest cipher
- * @type: specifies the type of the cipher
- * @mask: specifies the mask for the cipher
- *
- * Allocate a cipher handle for a message digest. The returned struct
- * crypto_hash is the cipher handle that is required for any subsequent
- * API invocation for that message digest.
- *
- * Return: allocated cipher handle in case of success; IS_ERR() is true in case
- * of an error, PTR_ERR() returns the error code.
- */
-static inline struct crypto_hash *crypto_alloc_hash(const char *alg_name,
- u32 type, u32 mask)
-{
- type &= ~CRYPTO_ALG_TYPE_MASK;
- mask &= ~CRYPTO_ALG_TYPE_MASK;
- type |= CRYPTO_ALG_TYPE_HASH;
- mask |= CRYPTO_ALG_TYPE_HASH_MASK;
-
- return __crypto_hash_cast(crypto_alloc_base(alg_name, type, mask));
-}
-
-static inline struct crypto_tfm *crypto_hash_tfm(struct crypto_hash *tfm)
-{
- return &tfm->base;
-}
-
-/**
- * crypto_free_hash() - zeroize and free message digest handle
- * @tfm: cipher handle to be freed
- */
-static inline void crypto_free_hash(struct crypto_hash *tfm)
-{
- crypto_free_tfm(crypto_hash_tfm(tfm));
-}
-
-/**
- * crypto_has_hash() - Search for the availability of a message digest
- * @alg_name: is the cra_name / name or cra_driver_name / driver name of the
- * message digest cipher
- * @type: specifies the type of the cipher
- * @mask: specifies the mask for the cipher
- *
- * Return: true when the message digest cipher is known to the kernel crypto
- * API; false otherwise
- */
-static inline int crypto_has_hash(const char *alg_name, u32 type, u32 mask)
-{
- type &= ~CRYPTO_ALG_TYPE_MASK;
- mask &= ~CRYPTO_ALG_TYPE_MASK;
- type |= CRYPTO_ALG_TYPE_HASH;
- mask |= CRYPTO_ALG_TYPE_HASH_MASK;
-
- return crypto_has_alg(alg_name, type, mask);
-}
-
-static inline struct hash_tfm *crypto_hash_crt(struct crypto_hash *tfm)
-{
- return &crypto_hash_tfm(tfm)->crt_hash;
-}
-
-/**
- * crypto_hash_blocksize() - obtain block size for message digest
- * @tfm: cipher handle
- *
- * The block size for the message digest cipher referenced with the cipher
- * handle is returned.
- *
- * Return: block size of cipher
- */
-static inline unsigned int crypto_hash_blocksize(struct crypto_hash *tfm)
-{
- return crypto_tfm_alg_blocksize(crypto_hash_tfm(tfm));
-}
-
-static inline unsigned int crypto_hash_alignmask(struct crypto_hash *tfm)
-{
- return crypto_tfm_alg_alignmask(crypto_hash_tfm(tfm));
-}
-
-/**
- * crypto_hash_digestsize() - obtain message digest size
- * @tfm: cipher handle
- *
- * The size for the message digest created by the message digest cipher
- * referenced with the cipher handle is returned.
- *
- * Return: message digest size
- */
-static inline unsigned int crypto_hash_digestsize(struct crypto_hash *tfm)
-{
- return crypto_hash_crt(tfm)->digestsize;
-}
-
-static inline u32 crypto_hash_get_flags(struct crypto_hash *tfm)
-{
- return crypto_tfm_get_flags(crypto_hash_tfm(tfm));
-}
-
-static inline void crypto_hash_set_flags(struct crypto_hash *tfm, u32 flags)
-{
- crypto_tfm_set_flags(crypto_hash_tfm(tfm), flags);
-}
-
-static inline void crypto_hash_clear_flags(struct crypto_hash *tfm, u32 flags)
-{
- crypto_tfm_clear_flags(crypto_hash_tfm(tfm), flags);
-}
-
-/**
- * crypto_hash_init() - (re)initialize message digest handle
- * @desc: cipher request handle that to be filled by caller --
- * desc.tfm is filled with the hash cipher handle;
- * desc.flags is filled with either CRYPTO_TFM_REQ_MAY_SLEEP or 0.
- *
- * The call (re-)initializes the message digest referenced by the hash cipher
- * request handle. Any potentially existing state created by previous
- * operations is discarded.
- *
- * Return: 0 if the message digest initialization was successful; < 0 if an
- * error occurred
- */
-static inline int crypto_hash_init(struct hash_desc *desc)
-{
- return crypto_hash_crt(desc->tfm)->init(desc);
-}
-
-/**
- * crypto_hash_update() - add data to message digest for processing
- * @desc: cipher request handle
- * @sg: scatter / gather list pointing to the data to be added to the message
- * digest
- * @nbytes: number of bytes to be processed from @sg
- *
- * Updates the message digest state of the cipher handle pointed to by the
- * hash cipher request handle with the input data pointed to by the
- * scatter/gather list.
- *
- * Return: 0 if the message digest update was successful; < 0 if an error
- * occurred
- */
-static inline int crypto_hash_update(struct hash_desc *desc,
- struct scatterlist *sg,
- unsigned int nbytes)
-{
- return crypto_hash_crt(desc->tfm)->update(desc, sg, nbytes);
-}
-
-/**
- * crypto_hash_final() - calculate message digest
- * @desc: cipher request handle
- * @out: message digest output buffer -- The caller must ensure that the out
- * buffer has a sufficient size (e.g. by using the crypto_hash_digestsize
- * function).
- *
- * Finalize the message digest operation and create the message digest
- * based on all data added to the cipher handle. The message digest is placed
- * into the output buffer.
- *
- * Return: 0 if the message digest creation was successful; < 0 if an error
- * occurred
- */
-static inline int crypto_hash_final(struct hash_desc *desc, u8 *out)
-{
- return crypto_hash_crt(desc->tfm)->final(desc, out);
-}
-
-/**
- * crypto_hash_digest() - calculate message digest for a buffer
- * @desc: see crypto_hash_final()
- * @sg: see crypto_hash_update()
- * @nbytes: see crypto_hash_update()
- * @out: see crypto_hash_final()
- *
- * This function is a "short-hand" for the function calls of crypto_hash_init,
- * crypto_hash_update and crypto_hash_final. The parameters have the same
- * meaning as discussed for those separate three functions.
- *
- * Return: 0 if the message digest creation was successful; < 0 if an error
- * occurred
- */
-static inline int crypto_hash_digest(struct hash_desc *desc,
- struct scatterlist *sg,
- unsigned int nbytes, u8 *out)
-{
- return crypto_hash_crt(desc->tfm)->digest(desc, sg, nbytes, out);
-}
-
-/**
- * crypto_hash_setkey() - set key for message digest
- * @hash: cipher handle
- * @key: buffer holding the key
- * @keylen: length of the key in bytes
- *
- * The caller provided key is set for the message digest cipher. The cipher
- * handle must point to a keyed hash in order for this function to succeed.
- *
- * Return: 0 if the setting of the key was successful; < 0 if an error occurred
- */
-static inline int crypto_hash_setkey(struct crypto_hash *hash,
- const u8 *key, unsigned int keylen)
-{
- return crypto_hash_crt(hash)->setkey(hash, key, keylen);
-}
-
static inline struct crypto_comp *__crypto_comp_cast(struct crypto_tfm *tfm)
{
return (struct crypto_comp *)tfm;
projects / cascardo / linux.git / commitdiff