include/crypto/akcipher.h

Source file repositories/reference/linux-study-clean/include/crypto/akcipher.h

File Facts

System
Linux kernel
Corpus path
include/crypto/akcipher.h
Extension
.h
Size
11589 bytes
Lines
379
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

struct akcipher_request {
	struct crypto_async_request base;
	struct scatterlist *src;
	struct scatterlist *dst;
	unsigned int src_len;
	unsigned int dst_len;
	void *__ctx[] CRYPTO_MINALIGN_ATTR;
};

/**
 * struct crypto_akcipher - user-instantiated objects which encapsulate
 * algorithms and core processing logic
 *
 * @reqsize:	Request context size required by algorithm implementation
 * @base:	Common crypto API algorithm data structure
 */
struct crypto_akcipher {
	unsigned int reqsize;

	struct crypto_tfm base;
};

/**
 * struct akcipher_alg - generic public key cipher algorithm
 *
 * @encrypt:	Function performs an encrypt operation as defined by public key
 *		algorithm. In case of error, where the dst_len was insufficient,
 *		the req->dst_len will be updated to the size required for the
 *		operation
 * @decrypt:	Function performs a decrypt operation as defined by public key
 *		algorithm. In case of error, where the dst_len was insufficient,
 *		the req->dst_len will be updated to the size required for the
 *		operation
 * @set_pub_key: Function invokes the algorithm specific set public key
 *		function, which knows how to decode and interpret
 *		the BER encoded public key and parameters
 * @set_priv_key: Function invokes the algorithm specific set private key
 *		function, which knows how to decode and interpret
 *		the BER encoded private key and parameters
 * @max_size:	Function returns dest buffer size required for a given key.
 * @init:	Initialize the cryptographic transformation object.
 *		This function is used to initialize the cryptographic
 *		transformation object. This function is called only once at
 *		the instantiation time, right after the transformation context
 *		was allocated. In case the cryptographic hardware has some
 *		special requirements which need to be handled by software, this
 *		function shall check for the precise requirement of the
 *		transformation and put any software fallbacks in place.
 * @exit:	Deinitialize the cryptographic transformation object. This is a
 *		counterpart to @init, used to remove various changes set in
 *		@init.
 *
 * @base:	Common crypto API algorithm data structure
 */
struct akcipher_alg {
	int (*encrypt)(struct akcipher_request *req);
	int (*decrypt)(struct akcipher_request *req);
	int (*set_pub_key)(struct crypto_akcipher *tfm, const void *key,
			   unsigned int keylen);
	int (*set_priv_key)(struct crypto_akcipher *tfm, const void *key,
			    unsigned int keylen);
	unsigned int (*max_size)(struct crypto_akcipher *tfm);
	int (*init)(struct crypto_akcipher *tfm);
	void (*exit)(struct crypto_akcipher *tfm);

	struct crypto_alg base;
};

/**
 * DOC: Generic Public Key Cipher API
 *
 * The Public Key Cipher API is used with the algorithms of type
 * CRYPTO_ALG_TYPE_AKCIPHER (listed as type "akcipher" in /proc/crypto)
 */

/**
 * crypto_alloc_akcipher() - allocate AKCIPHER tfm handle
 * @alg_name: is the cra_name / name or cra_driver_name / driver name of the
 *	      public key algorithm e.g. "rsa"
 * @type: specifies the type of the algorithm
 * @mask: specifies the mask for the algorithm
 *
 * Allocate a handle for public key algorithm. The returned struct
 * crypto_akcipher is the handle that is required for any subsequent
 * API invocation for the public key operations.
 *
 * Return: allocated handle in case of success; IS_ERR() is true in case
 *	   of an error, PTR_ERR() returns the error code.
 */
struct crypto_akcipher *crypto_alloc_akcipher(const char *alg_name, u32 type,

Annotation

Implementation Notes