---
name: "struct_akcipher_alg"
section: "9"
platform: "linux"
package: "linux-manual-4.9"
version: "4.9.228-1"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/struct_akcipher_alg"
---

# struct\_akcipher\_alg(9)

generic public key algorithm

## NAME

struct\_akcipher\_alg - generic public key algorithm

## SYNOPSIS

```
struct akcipher_alg {
  int (* sign) (struct akcipher_request *req);
  int (* verify) (struct akcipher_request *req);
  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);
  int (* max_size) (struct crypto_akcipher *tfm);
  int (* init) (struct crypto_akcipher *tfm);
  void (* exit) (struct crypto_akcipher *tfm);
  unsigned int reqsize;
  struct crypto_alg base;
};
```

## MEMBERS

sign

Function performs a sign 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

verify

Function performs a sign 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

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

set\_priv\_key

Function invokes the algorithm specific set private key function, which knows how to decode and interpret the BER encoded private key

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*.

reqsize

Request context size required by algorithm implementation

base

Common crypto API algorithm data structure

## AUTHORS

**Stephan Mueller** \<smueller@chronox.de\>

Author.

**Marek Vasut** \<marek@denx.de\>

Author.

## COPYRIGHT