mirror of
https://github.com/openssl/openssl.git
synced 2024-12-09 05:51:54 +08:00
260a16f336
Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/8893)
425 lines
22 KiB
Plaintext
425 lines
22 KiB
Plaintext
=pod
|
|
|
|
=head1 NAME
|
|
|
|
EVP_PKEY_meth_new, EVP_PKEY_meth_free, EVP_PKEY_meth_copy, EVP_PKEY_meth_find,
|
|
EVP_PKEY_meth_add0, EVP_PKEY_METHOD,
|
|
EVP_PKEY_meth_set_init, EVP_PKEY_meth_set_copy, EVP_PKEY_meth_set_cleanup,
|
|
EVP_PKEY_meth_set_paramgen, EVP_PKEY_meth_set_keygen, EVP_PKEY_meth_set_sign,
|
|
EVP_PKEY_meth_set_verify, EVP_PKEY_meth_set_verify_recover, EVP_PKEY_meth_set_signctx,
|
|
EVP_PKEY_meth_set_verifyctx, EVP_PKEY_meth_set_encrypt, EVP_PKEY_meth_set_decrypt,
|
|
EVP_PKEY_meth_set_derive, EVP_PKEY_meth_set_ctrl, EVP_PKEY_meth_set_check,
|
|
EVP_PKEY_meth_set_public_check, EVP_PKEY_meth_set_param_check,
|
|
EVP_PKEY_meth_set_digest_custom,
|
|
EVP_PKEY_meth_get_init, EVP_PKEY_meth_get_copy, EVP_PKEY_meth_get_cleanup,
|
|
EVP_PKEY_meth_get_paramgen, EVP_PKEY_meth_get_keygen, EVP_PKEY_meth_get_sign,
|
|
EVP_PKEY_meth_get_verify, EVP_PKEY_meth_get_verify_recover, EVP_PKEY_meth_get_signctx,
|
|
EVP_PKEY_meth_get_verifyctx, EVP_PKEY_meth_get_encrypt, EVP_PKEY_meth_get_decrypt,
|
|
EVP_PKEY_meth_get_derive, EVP_PKEY_meth_get_ctrl, EVP_PKEY_meth_get_check,
|
|
EVP_PKEY_meth_get_public_check, EVP_PKEY_meth_get_param_check,
|
|
EVP_PKEY_meth_get_digest_custom,
|
|
EVP_PKEY_meth_remove
|
|
- manipulating EVP_PKEY_METHOD structure
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
#include <openssl/evp.h>
|
|
|
|
typedef struct evp_pkey_method_st EVP_PKEY_METHOD;
|
|
|
|
EVP_PKEY_METHOD *EVP_PKEY_meth_new(int id, int flags);
|
|
void EVP_PKEY_meth_free(EVP_PKEY_METHOD *pmeth);
|
|
void EVP_PKEY_meth_copy(EVP_PKEY_METHOD *dst, const EVP_PKEY_METHOD *src);
|
|
const EVP_PKEY_METHOD *EVP_PKEY_meth_find(int type);
|
|
int EVP_PKEY_meth_add0(const EVP_PKEY_METHOD *pmeth);
|
|
int EVP_PKEY_meth_remove(const EVP_PKEY_METHOD *pmeth);
|
|
|
|
void EVP_PKEY_meth_set_init(EVP_PKEY_METHOD *pmeth,
|
|
int (*init) (EVP_PKEY_CTX *ctx));
|
|
void EVP_PKEY_meth_set_copy(EVP_PKEY_METHOD *pmeth,
|
|
int (*copy) (EVP_PKEY_CTX *dst,
|
|
EVP_PKEY_CTX *src));
|
|
void EVP_PKEY_meth_set_cleanup(EVP_PKEY_METHOD *pmeth,
|
|
void (*cleanup) (EVP_PKEY_CTX *ctx));
|
|
void EVP_PKEY_meth_set_paramgen(EVP_PKEY_METHOD *pmeth,
|
|
int (*paramgen_init) (EVP_PKEY_CTX *ctx),
|
|
int (*paramgen) (EVP_PKEY_CTX *ctx,
|
|
EVP_PKEY *pkey));
|
|
void EVP_PKEY_meth_set_keygen(EVP_PKEY_METHOD *pmeth,
|
|
int (*keygen_init) (EVP_PKEY_CTX *ctx),
|
|
int (*keygen) (EVP_PKEY_CTX *ctx,
|
|
EVP_PKEY *pkey));
|
|
void EVP_PKEY_meth_set_sign(EVP_PKEY_METHOD *pmeth,
|
|
int (*sign_init) (EVP_PKEY_CTX *ctx),
|
|
int (*sign) (EVP_PKEY_CTX *ctx,
|
|
unsigned char *sig, size_t *siglen,
|
|
const unsigned char *tbs,
|
|
size_t tbslen));
|
|
void EVP_PKEY_meth_set_verify(EVP_PKEY_METHOD *pmeth,
|
|
int (*verify_init) (EVP_PKEY_CTX *ctx),
|
|
int (*verify) (EVP_PKEY_CTX *ctx,
|
|
const unsigned char *sig,
|
|
size_t siglen,
|
|
const unsigned char *tbs,
|
|
size_t tbslen));
|
|
void EVP_PKEY_meth_set_verify_recover(EVP_PKEY_METHOD *pmeth,
|
|
int (*verify_recover_init) (EVP_PKEY_CTX
|
|
*ctx),
|
|
int (*verify_recover) (EVP_PKEY_CTX
|
|
*ctx,
|
|
unsigned char
|
|
*sig,
|
|
size_t *siglen,
|
|
const unsigned
|
|
char *tbs,
|
|
size_t tbslen));
|
|
void EVP_PKEY_meth_set_signctx(EVP_PKEY_METHOD *pmeth,
|
|
int (*signctx_init) (EVP_PKEY_CTX *ctx,
|
|
EVP_MD_CTX *mctx),
|
|
int (*signctx) (EVP_PKEY_CTX *ctx,
|
|
unsigned char *sig,
|
|
size_t *siglen,
|
|
EVP_MD_CTX *mctx));
|
|
void EVP_PKEY_meth_set_verifyctx(EVP_PKEY_METHOD *pmeth,
|
|
int (*verifyctx_init) (EVP_PKEY_CTX *ctx,
|
|
EVP_MD_CTX *mctx),
|
|
int (*verifyctx) (EVP_PKEY_CTX *ctx,
|
|
const unsigned char *sig,
|
|
int siglen,
|
|
EVP_MD_CTX *mctx));
|
|
void EVP_PKEY_meth_set_encrypt(EVP_PKEY_METHOD *pmeth,
|
|
int (*encrypt_init) (EVP_PKEY_CTX *ctx),
|
|
int (*encryptfn) (EVP_PKEY_CTX *ctx,
|
|
unsigned char *out,
|
|
size_t *outlen,
|
|
const unsigned char *in,
|
|
size_t inlen));
|
|
void EVP_PKEY_meth_set_decrypt(EVP_PKEY_METHOD *pmeth,
|
|
int (*decrypt_init) (EVP_PKEY_CTX *ctx),
|
|
int (*decrypt) (EVP_PKEY_CTX *ctx,
|
|
unsigned char *out,
|
|
size_t *outlen,
|
|
const unsigned char *in,
|
|
size_t inlen));
|
|
void EVP_PKEY_meth_set_derive(EVP_PKEY_METHOD *pmeth,
|
|
int (*derive_init) (EVP_PKEY_CTX *ctx),
|
|
int (*derive) (EVP_PKEY_CTX *ctx,
|
|
unsigned char *key,
|
|
size_t *keylen));
|
|
void EVP_PKEY_meth_set_ctrl(EVP_PKEY_METHOD *pmeth,
|
|
int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
|
|
void *p2),
|
|
int (*ctrl_str) (EVP_PKEY_CTX *ctx,
|
|
const char *type,
|
|
const char *value));
|
|
void EVP_PKEY_meth_set_check(EVP_PKEY_METHOD *pmeth,
|
|
int (*check) (EVP_PKEY *pkey));
|
|
void EVP_PKEY_meth_set_public_check(EVP_PKEY_METHOD *pmeth,
|
|
int (*check) (EVP_PKEY *pkey));
|
|
void EVP_PKEY_meth_set_param_check(EVP_PKEY_METHOD *pmeth,
|
|
int (*check) (EVP_PKEY *pkey));
|
|
void EVP_PKEY_meth_set_digest_custom(EVP_PKEY_METHOD *pmeth,
|
|
int (*digest_custom) (EVP_PKEY_CTX *ctx,
|
|
EVP_MD_CTX *mctx));
|
|
|
|
void EVP_PKEY_meth_get_init(const EVP_PKEY_METHOD *pmeth,
|
|
int (**pinit) (EVP_PKEY_CTX *ctx));
|
|
void EVP_PKEY_meth_get_copy(const EVP_PKEY_METHOD *pmeth,
|
|
int (**pcopy) (EVP_PKEY_CTX *dst,
|
|
EVP_PKEY_CTX *src));
|
|
void EVP_PKEY_meth_get_cleanup(const EVP_PKEY_METHOD *pmeth,
|
|
void (**pcleanup) (EVP_PKEY_CTX *ctx));
|
|
void EVP_PKEY_meth_get_paramgen(const EVP_PKEY_METHOD *pmeth,
|
|
int (**pparamgen_init) (EVP_PKEY_CTX *ctx),
|
|
int (**pparamgen) (EVP_PKEY_CTX *ctx,
|
|
EVP_PKEY *pkey));
|
|
void EVP_PKEY_meth_get_keygen(const EVP_PKEY_METHOD *pmeth,
|
|
int (**pkeygen_init) (EVP_PKEY_CTX *ctx),
|
|
int (**pkeygen) (EVP_PKEY_CTX *ctx,
|
|
EVP_PKEY *pkey));
|
|
void EVP_PKEY_meth_get_sign(const EVP_PKEY_METHOD *pmeth,
|
|
int (**psign_init) (EVP_PKEY_CTX *ctx),
|
|
int (**psign) (EVP_PKEY_CTX *ctx,
|
|
unsigned char *sig, size_t *siglen,
|
|
const unsigned char *tbs,
|
|
size_t tbslen));
|
|
void EVP_PKEY_meth_get_verify(const EVP_PKEY_METHOD *pmeth,
|
|
int (**pverify_init) (EVP_PKEY_CTX *ctx),
|
|
int (**pverify) (EVP_PKEY_CTX *ctx,
|
|
const unsigned char *sig,
|
|
size_t siglen,
|
|
const unsigned char *tbs,
|
|
size_t tbslen));
|
|
void EVP_PKEY_meth_get_verify_recover(const EVP_PKEY_METHOD *pmeth,
|
|
int (**pverify_recover_init) (EVP_PKEY_CTX
|
|
*ctx),
|
|
int (**pverify_recover) (EVP_PKEY_CTX
|
|
*ctx,
|
|
unsigned char
|
|
*sig,
|
|
size_t *siglen,
|
|
const unsigned
|
|
char *tbs,
|
|
size_t tbslen));
|
|
void EVP_PKEY_meth_get_signctx(const EVP_PKEY_METHOD *pmeth,
|
|
int (**psignctx_init) (EVP_PKEY_CTX *ctx,
|
|
EVP_MD_CTX *mctx),
|
|
int (**psignctx) (EVP_PKEY_CTX *ctx,
|
|
unsigned char *sig,
|
|
size_t *siglen,
|
|
EVP_MD_CTX *mctx));
|
|
void EVP_PKEY_meth_get_verifyctx(const EVP_PKEY_METHOD *pmeth,
|
|
int (**pverifyctx_init) (EVP_PKEY_CTX *ctx,
|
|
EVP_MD_CTX *mctx),
|
|
int (**pverifyctx) (EVP_PKEY_CTX *ctx,
|
|
const unsigned char *sig,
|
|
int siglen,
|
|
EVP_MD_CTX *mctx));
|
|
void EVP_PKEY_meth_get_encrypt(const EVP_PKEY_METHOD *pmeth,
|
|
int (**pencrypt_init) (EVP_PKEY_CTX *ctx),
|
|
int (**pencryptfn) (EVP_PKEY_CTX *ctx,
|
|
unsigned char *out,
|
|
size_t *outlen,
|
|
const unsigned char *in,
|
|
size_t inlen));
|
|
void EVP_PKEY_meth_get_decrypt(const EVP_PKEY_METHOD *pmeth,
|
|
int (**pdecrypt_init) (EVP_PKEY_CTX *ctx),
|
|
int (**pdecrypt) (EVP_PKEY_CTX *ctx,
|
|
unsigned char *out,
|
|
size_t *outlen,
|
|
const unsigned char *in,
|
|
size_t inlen));
|
|
void EVP_PKEY_meth_get_derive(const EVP_PKEY_METHOD *pmeth,
|
|
int (**pderive_init) (EVP_PKEY_CTX *ctx),
|
|
int (**pderive) (EVP_PKEY_CTX *ctx,
|
|
unsigned char *key,
|
|
size_t *keylen));
|
|
void EVP_PKEY_meth_get_ctrl(const EVP_PKEY_METHOD *pmeth,
|
|
int (**pctrl) (EVP_PKEY_CTX *ctx, int type, int p1,
|
|
void *p2),
|
|
int (**pctrl_str) (EVP_PKEY_CTX *ctx,
|
|
const char *type,
|
|
const char *value));
|
|
void EVP_PKEY_meth_get_check(const EVP_PKEY_METHOD *pmeth,
|
|
int (**pcheck) (EVP_PKEY *pkey));
|
|
void EVP_PKEY_meth_get_public_check(const EVP_PKEY_METHOD *pmeth,
|
|
int (**pcheck) (EVP_PKEY *pkey));
|
|
void EVP_PKEY_meth_get_param_check(const EVP_PKEY_METHOD *pmeth,
|
|
int (**pcheck) (EVP_PKEY *pkey));
|
|
void EVP_PKEY_meth_get_digest_custom(EVP_PKEY_METHOD *pmeth,
|
|
int (**pdigest_custom) (EVP_PKEY_CTX *ctx,
|
|
EVP_MD_CTX *mctx));
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
B<EVP_PKEY_METHOD> is a structure which holds a set of methods for a
|
|
specific public key cryptographic algorithm. Those methods are usually
|
|
used to perform different jobs, such as generating a key, signing or
|
|
verifying, encrypting or decrypting, etc.
|
|
|
|
There are two places where the B<EVP_PKEY_METHOD> objects are stored: one
|
|
is a built-in static array representing the standard methods for different
|
|
algorithms, and the other one is a stack of user-defined application-specific
|
|
methods, which can be manipulated by using L<EVP_PKEY_meth_add0(3)>.
|
|
|
|
The B<EVP_PKEY_METHOD> objects are usually referenced by B<EVP_PKEY_CTX>
|
|
objects.
|
|
|
|
=head2 Methods
|
|
|
|
The methods are the underlying implementations of a particular public key
|
|
algorithm present by the B<EVP_PKEY_CTX> object.
|
|
|
|
int (*init) (EVP_PKEY_CTX *ctx);
|
|
int (*copy) (EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src);
|
|
void (*cleanup) (EVP_PKEY_CTX *ctx);
|
|
|
|
The init() method is called to initialize algorithm-specific data when a new
|
|
B<EVP_PKEY_CTX> is created. As opposed to init(), the cleanup() method is called
|
|
when an B<EVP_PKEY_CTX> is freed. The copy() method is called when an B<EVP_PKEY_CTX>
|
|
is being duplicated. Refer to L<EVP_PKEY_CTX_new(3)>, L<EVP_PKEY_CTX_new_id(3)>,
|
|
L<EVP_PKEY_CTX_free(3)> and L<EVP_PKEY_CTX_dup(3)>.
|
|
|
|
int (*paramgen_init) (EVP_PKEY_CTX *ctx);
|
|
int (*paramgen) (EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
|
|
|
|
The paramgen_init() and paramgen() methods deal with key parameter generation.
|
|
They are called by L<EVP_PKEY_paramgen_init(3)> and L<EVP_PKEY_paramgen(3)> to
|
|
handle the parameter generation process.
|
|
|
|
int (*keygen_init) (EVP_PKEY_CTX *ctx);
|
|
int (*keygen) (EVP_PKEY_CTX *ctx, EVP_PKEY *pkey);
|
|
|
|
The keygen_init() and keygen() methods are used to generate the actual key for
|
|
the specified algorithm. They are called by L<EVP_PKEY_keygen_init(3)> and
|
|
L<EVP_PKEY_keygen(3)>.
|
|
|
|
int (*sign_init) (EVP_PKEY_CTX *ctx);
|
|
int (*sign) (EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
|
|
const unsigned char *tbs, size_t tbslen);
|
|
|
|
The sign_init() and sign() methods are used to generate the signature of a
|
|
piece of data using a private key. They are called by L<EVP_PKEY_sign_init(3)>
|
|
and L<EVP_PKEY_sign(3)>.
|
|
|
|
int (*verify_init) (EVP_PKEY_CTX *ctx);
|
|
int (*verify) (EVP_PKEY_CTX *ctx,
|
|
const unsigned char *sig, size_t siglen,
|
|
const unsigned char *tbs, size_t tbslen);
|
|
|
|
The verify_init() and verify() methods are used to verify whether a signature is
|
|
valid. They are called by L<EVP_PKEY_verify_init(3)> and L<EVP_PKEY_verify(3)>.
|
|
|
|
int (*verify_recover_init) (EVP_PKEY_CTX *ctx);
|
|
int (*verify_recover) (EVP_PKEY_CTX *ctx,
|
|
unsigned char *rout, size_t *routlen,
|
|
const unsigned char *sig, size_t siglen);
|
|
|
|
The verify_recover_init() and verify_recover() methods are used to verify a
|
|
signature and then recover the digest from the signature (for instance, a
|
|
signature that was generated by RSA signing algorithm). They are called by
|
|
L<EVP_PKEY_verify_recover_init(3)> and L<EVP_PKEY_verify_recover(3)>.
|
|
|
|
int (*signctx_init) (EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
|
|
int (*signctx) (EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
|
|
EVP_MD_CTX *mctx);
|
|
|
|
The signctx_init() and signctx() methods are used to sign a digest present by
|
|
a B<EVP_MD_CTX> object. They are called by the EVP_DigestSign functions. See
|
|
L<EVP_DigestSignInit(3)> for details.
|
|
|
|
int (*verifyctx_init) (EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
|
|
int (*verifyctx) (EVP_PKEY_CTX *ctx, const unsigned char *sig, int siglen,
|
|
EVP_MD_CTX *mctx);
|
|
|
|
The verifyctx_init() and verifyctx() methods are used to verify a signature
|
|
against the data in a B<EVP_MD_CTX> object. They are called by the various
|
|
EVP_DigestVerify functions. See L<EVP_DigestVerifyInit(3)> for details.
|
|
|
|
int (*encrypt_init) (EVP_PKEY_CTX *ctx);
|
|
int (*encrypt) (EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
|
|
const unsigned char *in, size_t inlen);
|
|
|
|
The encrypt_init() and encrypt() methods are used to encrypt a piece of data.
|
|
They are called by L<EVP_PKEY_encrypt_init(3)> and L<EVP_PKEY_encrypt(3)>.
|
|
|
|
int (*decrypt_init) (EVP_PKEY_CTX *ctx);
|
|
int (*decrypt) (EVP_PKEY_CTX *ctx, unsigned char *out, size_t *outlen,
|
|
const unsigned char *in, size_t inlen);
|
|
|
|
The decrypt_init() and decrypt() methods are used to decrypt a piece of data.
|
|
They are called by L<EVP_PKEY_decrypt_init(3)> and L<EVP_PKEY_decrypt(3)>.
|
|
|
|
int (*derive_init) (EVP_PKEY_CTX *ctx);
|
|
int (*derive) (EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen);
|
|
|
|
The derive_init() and derive() methods are used to derive the shared secret
|
|
from a public key algorithm (for instance, the DH algorithm). They are called by
|
|
L<EVP_PKEY_derive_init(3)> and L<EVP_PKEY_derive(3)>.
|
|
|
|
int (*ctrl) (EVP_PKEY_CTX *ctx, int type, int p1, void *p2);
|
|
int (*ctrl_str) (EVP_PKEY_CTX *ctx, const char *type, const char *value);
|
|
|
|
The ctrl() and ctrl_str() methods are used to adjust algorithm-specific
|
|
settings. See L<EVP_PKEY_CTX_ctrl(3)> and related functions for details.
|
|
|
|
int (*digestsign) (EVP_MD_CTX *ctx, unsigned char *sig, size_t *siglen,
|
|
const unsigned char *tbs, size_t tbslen);
|
|
int (*digestverify) (EVP_MD_CTX *ctx, const unsigned char *sig,
|
|
size_t siglen, const unsigned char *tbs,
|
|
size_t tbslen);
|
|
|
|
The digestsign() and digestverify() methods are used to generate or verify
|
|
a signature in a one-shot mode. They could be called by L<EVP_DigestSign(3)>
|
|
and L<EVP_DigestVerify(3)>.
|
|
|
|
int (*check) (EVP_PKEY *pkey);
|
|
int (*public_check) (EVP_PKEY *pkey);
|
|
int (*param_check) (EVP_PKEY *pkey);
|
|
|
|
The check(), public_check() and param_check() methods are used to validate a
|
|
key-pair, the public component and parameters respectively for a given B<pkey>.
|
|
They could be called by L<EVP_PKEY_check(3)>, L<EVP_PKEY_public_check(3)> and
|
|
L<EVP_PKEY_param_check(3)> respectively.
|
|
|
|
int (*digest_custom) (EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx);
|
|
|
|
The digest_custom() method is used to generate customized digest content before
|
|
the real message is passed to functions like L<EVP_DigestSignUpdate(3)> or
|
|
L<EVP_DigestVerifyInit(3)>. This is usually required by some public key
|
|
signature algorithms like SM2 which requires a hashed prefix to the message to
|
|
be signed. The digest_custom() function will be called by L<EVP_DigestSignInit(3)>
|
|
and L<EVP_DigestVerifyInit(3)>.
|
|
|
|
=head2 Functions
|
|
|
|
EVP_PKEY_meth_new() creates and returns a new B<EVP_PKEY_METHOD> object,
|
|
and associates the given B<id> and B<flags>. The following flags are
|
|
supported:
|
|
|
|
EVP_PKEY_FLAG_AUTOARGLEN
|
|
EVP_PKEY_FLAG_SIGCTX_CUSTOM
|
|
|
|
If an B<EVP_PKEY_METHOD> is set with the B<EVP_PKEY_FLAG_AUTOARGLEN> flag, the
|
|
maximum size of the output buffer will be automatically calculated or checked
|
|
in corresponding EVP methods by the EVP framework. Thus the implementations of
|
|
these methods don't need to care about handling the case of returning output
|
|
buffer size by themselves. For details on the output buffer size, refer to
|
|
L<EVP_PKEY_sign(3)>.
|
|
|
|
The B<EVP_PKEY_FLAG_SIGCTX_CUSTOM> is used to indicate the signctx() method
|
|
of an B<EVP_PKEY_METHOD> is always called by the EVP framework while doing a
|
|
digest signing operation by calling L<EVP_DigestSignFinal(3)>.
|
|
|
|
EVP_PKEY_meth_free() frees an existing B<EVP_PKEY_METHOD> pointed by
|
|
B<pmeth>.
|
|
|
|
EVP_PKEY_meth_copy() copies an B<EVP_PKEY_METHOD> object from B<src>
|
|
to B<dst>.
|
|
|
|
EVP_PKEY_meth_find() finds an B<EVP_PKEY_METHOD> object with the B<id>.
|
|
This function first searches through the user-defined method objects and
|
|
then the built-in objects.
|
|
|
|
EVP_PKEY_meth_add0() adds B<pmeth> to the user defined stack of methods.
|
|
|
|
EVP_PKEY_meth_remove() removes an B<EVP_PKEY_METHOD> object added by
|
|
EVP_PKEY_meth_add0().
|
|
|
|
The EVP_PKEY_meth_set functions set the corresponding fields of
|
|
B<EVP_PKEY_METHOD> structure with the arguments passed.
|
|
|
|
The EVP_PKEY_meth_get functions get the corresponding fields of
|
|
B<EVP_PKEY_METHOD> structure to the arguments provided.
|
|
|
|
=head1 RETURN VALUES
|
|
|
|
EVP_PKEY_meth_new() returns a pointer to a new B<EVP_PKEY_METHOD>
|
|
object or returns NULL on error.
|
|
|
|
EVP_PKEY_meth_free() and EVP_PKEY_meth_copy() do not return values.
|
|
|
|
EVP_PKEY_meth_find() returns a pointer to the found B<EVP_PKEY_METHOD>
|
|
object or returns NULL if not found.
|
|
|
|
EVP_PKEY_meth_add0() returns 1 if method is added successfully or 0
|
|
if an error occurred.
|
|
|
|
EVP_PKEY_meth_remove() returns 1 if method is removed successfully or
|
|
0 if an error occurred.
|
|
|
|
All EVP_PKEY_meth_set and EVP_PKEY_meth_get functions have no return
|
|
values. For the 'get' functions, function pointers are returned by
|
|
arguments.
|
|
|
|
=head1 COPYRIGHT
|
|
|
|
Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.
|
|
|
|
Licensed under the Apache License 2.0 (the "License"). You may not use
|
|
this file except in compliance with the License. You can obtain a copy
|
|
in the file LICENSE in the source distribution or at
|
|
L<https://www.openssl.org/source/license.html>.
|
|
|
|
=cut
|