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EVP_PKEY_get0_EC_KEY.html
<?xml version="1.0" ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>EVP_PKEY_set1_RSA</title> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <link rev="made" href="mailto:root@localhost" /> </head> <body> <ul id="index"> <li><a href="#NAME">NAME</a></li> <li><a href="#SYNOPSIS">SYNOPSIS</a></li> <li><a href="#DESCRIPTION">DESCRIPTION</a></li> <li><a href="#NOTES">NOTES</a></li> <li><a href="#RETURN-VALUES">RETURN VALUES</a></li> <li><a href="#EXAMPLES">EXAMPLES</a></li> <li><a href="#SEE-ALSO">SEE ALSO</a></li> <li><a href="#COPYRIGHT">COPYRIGHT</a></li> </ul> <h1 id="NAME">NAME</h1> <p>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_assign_POLY1305, EVP_PKEY_assign_SIPHASH, EVP_PKEY_get0_hmac, EVP_PKEY_get0_poly1305, EVP_PKEY_get0_siphash, EVP_PKEY_type, EVP_PKEY_id, EVP_PKEY_base_id, EVP_PKEY_set_alias_type, EVP_PKEY_set1_engine, EVP_PKEY_get0_engine - EVP_PKEY assignment functions</p> <h1 id="SYNOPSIS">SYNOPSIS</h1> <pre><code> #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); const unsigned char *EVP_PKEY_get0_poly1305(const EVP_PKEY *pkey, size_t *len); const unsigned char *EVP_PKEY_get0_siphash(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_assign_POLY1305(EVP_PKEY *pkey, ASN1_OCTET_STRING *key); int EVP_PKEY_assign_SIPHASH(EVP_PKEY *pkey, ASN1_OCTET_STRING *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_set_alias_type(EVP_PKEY *pkey, int type); ENGINE *EVP_PKEY_get0_engine(const EVP_PKEY *pkey); int EVP_PKEY_set1_engine(EVP_PKEY *pkey, ENGINE *engine);</code></pre> <h1 id="DESCRIPTION">DESCRIPTION</h1> <p>EVP_PKEY_set1_RSA(), EVP_PKEY_set1_DSA(), EVP_PKEY_set1_DH() and EVP_PKEY_set1_EC_KEY() set the key referenced by <b>pkey</b> to <b>key</b>.</p> <p>EVP_PKEY_get1_RSA(), EVP_PKEY_get1_DSA(), EVP_PKEY_get1_DH() and EVP_PKEY_get1_EC_KEY() return the referenced key in <b>pkey</b> or <b>NULL</b> if the key is not of the correct type.</p> <p>EVP_PKEY_get0_hmac(), EVP_PKEY_get0_poly1305(), EVP_PKEY_get0_siphash(), EVP_PKEY_get0_RSA(), EVP_PKEY_get0_DSA(), EVP_PKEY_get0_DH() and EVP_PKEY_get0_EC_KEY() also return the referenced key in <b>pkey</b> or <b>NULL</b> if the key is not of the correct type but the reference count of the returned key is <b>not</b> incremented and so must not be freed up after use.</p> <p>EVP_PKEY_assign_RSA(), EVP_PKEY_assign_DSA(), EVP_PKEY_assign_DH(), EVP_PKEY_assign_EC_KEY(), EVP_PKEY_assign_POLY1305() and EVP_PKEY_assign_SIPHASH() also set the referenced key to <b>key</b> however these use the supplied <b>key</b> internally and so <b>key</b> will be freed when the parent <b>pkey</b> is freed.</p> <p>EVP_PKEY_base_id() returns the type of <b>pkey</b>. For example an RSA key will return <b>EVP_PKEY_RSA</b>.</p> <p>EVP_PKEY_id() returns the actual OID associated with <b>pkey</b>. Historically keys using the same algorithm could use different OIDs. For example an RSA key could use the OIDs corresponding to the NIDs <b>NID_rsaEncryption</b> (equivalent to <b>EVP_PKEY_RSA</b>) or <b>NID_rsa</b> (equivalent to <b>EVP_PKEY_RSA2</b>). The use of alternative non-standard OIDs is now rare so <b>EVP_PKEY_RSA2</b> et al are not often seen in practice.</p> <p>EVP_PKEY_type() returns the underlying type of the NID <b>type</b>. For example EVP_PKEY_type(EVP_PKEY_RSA2) will return <b>EVP_PKEY_RSA</b>.</p> <p>EVP_PKEY_get0_engine() returns a reference to the ENGINE handling <b>pkey</b>.</p> <p>EVP_PKEY_set1_engine() sets the ENGINE handling <b>pkey</b> to <b>engine</b>. It must be called after the key algorithm and components are set up. If <b>engine</b> does not include an <b>EVP_PKEY_METHOD</b> for <b>pkey</b> an error occurs.</p> <p>EVP_PKEY_set_alias_type() allows modifying a EVP_PKEY to use a different set of algorithms than the default. This is currently used to support SM2 keys, which use an identical encoding to ECDSA.</p> <h1 id="NOTES">NOTES</h1> <p>In accordance with the OpenSSL naming convention the key obtained from or assigned to the <b>pkey</b> using the <b>1</b> functions must be freed as well as <b>pkey</b>.</p> <p>EVP_PKEY_assign_RSA(), EVP_PKEY_assign_DSA(), EVP_PKEY_assign_DH(), EVP_PKEY_assign_EC_KEY(), EVP_PKEY_assign_POLY1305() and EVP_PKEY_assign_SIPHASH() are implemented as macros.</p> <p>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.</p> <p>Previous versions of this document suggested using EVP_PKEY_type(pkey->type) to determine the type of a key. Since <b>EVP_PKEY</b> is now opaque this is no longer possible: the equivalent is EVP_PKEY_base_id(pkey).</p> <p>EVP_PKEY_set1_engine() is typically used by an ENGINE returning an HSM key as part of its routine to load a private key.</p> <h1 id="RETURN-VALUES">RETURN VALUES</h1> <p>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.</p> <p>EVP_PKEY_get1_RSA(), EVP_PKEY_get1_DSA(), EVP_PKEY_get1_DH() and EVP_PKEY_get1_EC_KEY() return the referenced key or <b>NULL</b> if an error occurred.</p> <p>EVP_PKEY_assign_RSA(), EVP_PKEY_assign_DSA(), EVP_PKEY_assign_DH(), EVP_PKEY_assign_EC_KEY(), EVP_PKEY_assign_POLY1305() and EVP_PKEY_assign_SIPHASH() return 1 for success and 0 for failure.</p> <p>EVP_PKEY_base_id(), EVP_PKEY_id() and EVP_PKEY_type() return a key type or <b>NID_undef</b> (equivalently <b>EVP_PKEY_NONE</b>) on error.</p> <p>EVP_PKEY_set1_engine() returns 1 for success and 0 for failure.</p> <p>EVP_PKEY_set_alias_type() returns 1 for success and 0 for error.</p> <h1 id="EXAMPLES">EXAMPLES</h1> <p>After loading an ECC key, it is possible to convert it to using SM2 algorithms with EVP_PKEY_set_alias_type:</p> <pre><code> EVP_PKEY_set_alias_type(pkey, EVP_PKEY_SM2);</code></pre> <h1 id="SEE-ALSO">SEE ALSO</h1> <p><a href="../man3/EVP_PKEY_new.html">EVP_PKEY_new(3)</a></p> <h1 id="COPYRIGHT">COPYRIGHT</h1> <p>Copyright 2002-2019 The OpenSSL Project Authors. All Rights Reserved.</p> <p>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 LICENSE in the source distribution or at <a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p> </body> </html>
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