EVP_PKEY_get0_DH (3)

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NAME

EVP_PKEY_set1_RSA, EVP_PKEY_set1_DSA, EVP_PKEY_set1_DH, EVP_PKEY_set1_EC_KEY, EVP_PKEY_get1_RSA, EVP_PKEY_get1_DSA, EVP_PKEY_get1_DH, EVP_PKEY_get1_EC_KEY, EVP_PKEY_get0_RSA, EVP_PKEY_get0_DSA, EVP_PKEY_get0_DH, EVP_PKEY_get0_EC_KEY, EVP_PKEY_assign_RSA, EVP_PKEY_assign_DSA, EVP_PKEY_assign_DH, EVP_PKEY_assign_EC_KEY, EVP_PKEY_get0_hmac, EVP_PKEY_type, EVP_PKEY_id, EVP_PKEY_base_id, EVP_PKEY_set1_engine - EVP_PKEY assignment functions

SYNOPSIS

 #include <openssl/evp.h>

 int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key);
 int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key);
 int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key);
 int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key);

 RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey);
 DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey);
 DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey);
 EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey);

 const unsigned char *EVP_PKEY_get0_hmac(const EVP_PKEY *pkey, size_t *len);
 RSA *EVP_PKEY_get0_RSA(EVP_PKEY *pkey);
 DSA *EVP_PKEY_get0_DSA(EVP_PKEY *pkey);
 DH *EVP_PKEY_get0_DH(EVP_PKEY *pkey);
 EC_KEY *EVP_PKEY_get0_EC_KEY(EVP_PKEY *pkey);

 int EVP_PKEY_assign_RSA(EVP_PKEY *pkey, RSA *key);
 int EVP_PKEY_assign_DSA(EVP_PKEY *pkey, DSA *key);
 int EVP_PKEY_assign_DH(EVP_PKEY *pkey, DH *key);
 int EVP_PKEY_assign_EC_KEY(EVP_PKEY *pkey, EC_KEY *key);

 int EVP_PKEY_id(const EVP_PKEY *pkey);
 int EVP_PKEY_base_id(const EVP_PKEY *pkey);
 int EVP_PKEY_type(int type);

 int EVP_PKEY_set1_engine(EVP_PKEY *pkey, ENGINE *engine);

DESCRIPTION

EVP_PKEY_set1_RSA(), EVP_PKEY_set1_DSA(), EVP_PKEY_set1_DH() and EVP_PKEY_set1_EC_KEY() set the key referenced by pkey to key.

EVP_PKEY_get1_RSA(), EVP_PKEY_get1_DSA(), EVP_PKEY_get1_DH() and EVP_PKEY_get1_EC_KEY() return the referenced key in pkey or

if the key is not of the correct type.

EVP_PKEY_get0_hmac(), EVP_PKEY_get0_RSA(), EVP_PKEY_get0_DSA(), EVP_PKEY_get0_DH() and EVP_PKEY_get0_EC_KEY() also return the referenced key in pkey or

if the key is not of the correct type but the reference count of the returned key is not incremented and so must not be freed up after use.

EVP_PKEY_assign_RSA(), EVP_PKEY_assign_DSA(), EVP_PKEY_assign_DH() and EVP_PKEY_assign_EC_KEY() also set the referenced key to key however these use the supplied key internally and so key will be freed when the parent pkey is freed.

EVP_PKEY_base_id() returns the type of pkey. For example an

key will return .

EVP_PKEY_id() returns the actual

associated with pkey. Historically keys using the same algorithm could use different OIDs. For example an key could use the OIDs corresponding to the NIDs NID_rsaEncryption (equivalent to ) or NID_rsa (equivalent to ). The use of alternative non-standard OIDs is now rare so et al are not often seen in practice.

EVP_PKEY_type() returns the underlying type of the

type. For example EVP_PKEY_type() will return .

EVP_PKEY_set1_engine() sets the

handling pkey to engine. It must be called after the key algorithm and components are set up. If engine does not include an for pkey an error occurs.

NOTES

In accordance with the OpenSSL naming convention the key obtained from or assigned to the pkey using the 1 functions must be freed as well as pkey.

EVP_PKEY_assign_RSA(), EVP_PKEY_assign_DSA(), EVP_PKEY_assign_DH() and EVP_PKEY_assign_EC_KEY() are implemented as macros.

Most applications wishing to know a key type will simply call EVP_PKEY_base_id() and will not care about the actual type: which will be identical in almost all cases.

Previous versions of this document suggested using EVP_PKEY_type(pkey->type) to determine the type of a key. Since

is now opaque this is no longer possible: the equivalent is EVP_PKEY_base_id(pkey).

EVP_PKEY_set1_engine() is typically used by an

returning an key as part of its routine to load a private key.

RETURN VALUES

EVP_PKEY_set1_RSA(), EVP_PKEY_set1_DSA(), EVP_PKEY_set1_DH() and EVP_PKEY_set1_EC_KEY() return 1 for success or 0 for failure.

EVP_PKEY_get1_RSA(), EVP_PKEY_get1_DSA(), EVP_PKEY_get1_DH() and EVP_PKEY_get1_EC_KEY() return the referenced key or

if an error occurred.

EVP_PKEY_assign_RSA(), EVP_PKEY_assign_DSA(), EVP_PKEY_assign_DH() and EVP_PKEY_assign_EC_KEY() return 1 for success and 0 for failure.

EVP_PKEY_base_id(), EVP_PKEY_id() and EVP_PKEY_type() return a key type or NID_undef (equivalently

) on error.

EVP_PKEY_set1_engine() returns 1 for success and 0 for failure.

SEE ALSO

EVP_PKEY_new(3)

COPYRIGHT

Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the OpenSSL license (the ``License''). You may not use this file except in compliance with the License. You can obtain a copy in the file

in the source distribution or at <www.openssl.org/source/license.html>.