=pod
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=head1 NAME
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EVP_PKEY_set1_RSA, EVP_PKEY_set1_DSA, EVP_PKEY_set1_DH, EVP_PKEY_set1_EC_KEY,
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EVP_PKEY_get1_RSA, EVP_PKEY_get1_DSA, EVP_PKEY_get1_DH, EVP_PKEY_get1_EC_KEY,
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EVP_PKEY_assign_RSA, EVP_PKEY_assign_DSA, EVP_PKEY_assign_DH, EVP_PKEY_assign_EC_KEY,
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EVP_PKEY_type - EVP_PKEY assignment functions.
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=head1 SYNOPSIS
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#include <openssl/evp.h>
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int EVP_PKEY_set1_RSA(EVP_PKEY *pkey,RSA *key);
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int EVP_PKEY_set1_DSA(EVP_PKEY *pkey,DSA *key);
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int EVP_PKEY_set1_DH(EVP_PKEY *pkey,DH *key);
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int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey,EC_KEY *key);
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RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey);
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DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey);
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DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey);
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EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey);
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int EVP_PKEY_assign_RSA(EVP_PKEY *pkey,RSA *key);
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int EVP_PKEY_assign_DSA(EVP_PKEY *pkey,DSA *key);
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int EVP_PKEY_assign_DH(EVP_PKEY *pkey,DH *key);
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int EVP_PKEY_assign_EC_KEY(EVP_PKEY *pkey,EC_KEY *key);
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int EVP_PKEY_type(int type);
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=head1 DESCRIPTION
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EVP_PKEY_set1_RSA(), EVP_PKEY_set1_DSA(), EVP_PKEY_set1_DH() and
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EVP_PKEY_set1_EC_KEY() set the key referenced by B<pkey> to B<key>.
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EVP_PKEY_get1_RSA(), EVP_PKEY_get1_DSA(), EVP_PKEY_get1_DH() and
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EVP_PKEY_get1_EC_KEY() return the referenced key in B<pkey> or
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B<NULL> if the key is not of the correct type.
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EVP_PKEY_assign_RSA() EVP_PKEY_assign_DSA(), EVP_PKEY_assign_DH()
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and EVP_PKEY_assign_EC_KEY() also set the referenced key to B<key>
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however these use the supplied B<key> internally and so B<key>
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will be freed when the parent B<pkey> is freed.
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EVP_PKEY_type() returns the type of key corresponding to the value
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B<type>. The type of a key can be obtained with
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EVP_PKEY_type(pkey->type). The return value will be EVP_PKEY_RSA,
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EVP_PKEY_DSA, EVP_PKEY_DH or EVP_PKEY_EC for the corresponding
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key types or NID_undef if the key type is unassigned.
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=head1 NOTES
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In accordance with the OpenSSL naming convention the key obtained
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from or assigned to the B<pkey> using the B<1> functions must be
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freed as well as B<pkey>.
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EVP_PKEY_assign_RSA() EVP_PKEY_assign_DSA(), EVP_PKEY_assign_DH()
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EVP_PKEY_assign_EC_KEY() are implemented as macros.
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=head1 RETURN VALUES
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EVP_PKEY_set1_RSA(), EVP_PKEY_set1_DSA(), EVP_PKEY_set1_DH() and
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EVP_PKEY_set1_EC_KEY() return 1 for success or 0 for failure.
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EVP_PKEY_get1_RSA(), EVP_PKEY_get1_DSA(), EVP_PKEY_get1_DH() and
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EVP_PKEY_get1_EC_KEY() return the referenced key or B<NULL> if
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an error occurred.
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EVP_PKEY_assign_RSA() EVP_PKEY_assign_DSA(), EVP_PKEY_assign_DH()
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and EVP_PKEY_assign_EC_KEY() return 1 for success and 0 for failure.
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=head1 SEE ALSO
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L<EVP_PKEY_new(3)|EVP_PKEY_new(3)>
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=head1 HISTORY
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TBA
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=cut
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