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# evp ## Name evp -- EVP keys data implementation. ## Synopsis
    int                 xmlSecOpenSSLEvpKeyDataAdoptEvp     (xmlSecKeyDataPtr data,
                                                             EVP_PKEY *pKey);
    EVP_PKEY*           xmlSecOpenSSLEvpKeyDataGetEvp       (xmlSecKeyDataPtr data);
    EVP_PKEY*           xmlSecOpenSSLEvpKeyDup              (EVP_PKEY *pKey);
    xmlSecKeyDataPtr    xmlSecOpenSSLEvpKeyAdopt            (EVP_PKEY *pKey);
## Description EVP keys data implementation. ## Details ### xmlSecOpenSSLEvpKeyDataAdoptEvp ()
    int                 xmlSecOpenSSLEvpKeyDataAdoptEvp     (xmlSecKeyDataPtr data,
                                                             EVP_PKEY *pKey);
Sets the value of key data.
`data` : | the pointer to OpenSSL EVP key data.
`pKey` : | the pointer to EVP key.
Returns : | 0 on success or a negative value otherwise.
### xmlSecOpenSSLEvpKeyDataGetEvp ()
    EVP_PKEY*           xmlSecOpenSSLEvpKeyDataGetEvp       (xmlSecKeyDataPtr data);
Gets the EVP_PKEY from the key data.
`data` : | the pointer to OpenSSL EVP data.
Returns : | pointer to EVP_PKEY or NULL if an error occurs.
### xmlSecOpenSSLEvpKeyDup ()
    EVP_PKEY*           xmlSecOpenSSLEvpKeyDup              (EVP_PKEY *pKey);
Duplicates `pKey`.
`pKey` : | the pointer to EVP_PKEY.
Returns : | pointer to newly created EVP_PKEY object or NULL if an error occurs.
### xmlSecOpenSSLEvpKeyAdopt ()
    xmlSecKeyDataPtr    xmlSecOpenSSLEvpKeyAdopt            (EVP_PKEY *pKey);
Creates xmlsec key object from OpenSSL key object.
`pKey` : | the pointer to EVP_PKEY.
Returns : | pointer to newly created xmlsec key or NULL if an error occurs.