d2i_Private_key(3ssl) - phpMan

d2i_PrivateKey(3)                            OpenSSL                            d2i_PrivateKey(3)



NAME
       d2i_Private_key, d2i_AutoPrivateKey, i2d_PrivateKey - decode and encode functions for
       reading and saving EVP_PKEY structures.

SYNOPSIS
        #include <openssl/evp.h>

        EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp,
                                 long length);
        EVP_PKEY *d2i_AutoPrivateKey(EVP_PKEY **a, const unsigned char **pp,
                                     long length);
        int i2d_PrivateKey(EVP_PKEY *a, unsigned char **pp);

DESCRIPTION
       d2i_PrivateKey() decodes a private key using algorithm type. It attempts to use any key
       specific format or PKCS#8 unencrypted PrivateKeyInfo format. The type parameter should be
       a public key algorithm constant such as EVP_PKEY_RSA. An error occurs if the decoded key
       does not match type.

       d2i_AutoPrivateKey() is similar to d2i_PrivateKey() except it attempts to automatically
       detect the private key format.

       i2d_PrivateKey() encodes key. It uses a key specific format or, if none is defined for
       that key type, PKCS#8 unencrypted PrivateKeyInfo format.

       These functions are similar to the d2i_X509() functions, and you should refer to that page
       for a detailed description (see d2i_X509(3)).

NOTES
       All these functions use DER format and unencrypted keys. Applications wishing to encrypt
       or decrypt private keys should use other functions such as d2i_PKC8PrivateKey() instead.

       If the *a is not NULL when calling d2i_PrivateKey() or d2i_AutoPrivateKey() (i.e. an
       existing structure is being reused) and the key format is PKCS#8 then *a will be freed and
       replaced on a successful call.

RETURN VALUES
       d2i_PrivateKey() and d2i_AutoPrivateKey() return a valid EVP_KEY structure or NULL if an
       error occurs. The error code can be obtained by calling ERR_get_error(3).

       i2d_PrivateKey() returns the number of bytes successfully encoded or a negative value if
       an error occurs. The error code can be obtained by calling ERR_get_error(3).

SEE ALSO
       crypto(3), d2i_PKCS8PrivateKey(3)



1.0.2k                                      2017-01-26                          d2i_PrivateKey(3)

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