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d2i_PKCS8PrivateKey_bio(3)          OpenSSL         d2i_PKCS8PrivateKey_bio(3)

       d2i_PKCS8PrivateKey_bio, d2i_PKCS8PrivateKey_fp,
       i2d_PKCS8PrivateKey_bio, i2d_PKCS8PrivateKey_fp,
       i2d_PKCS8PrivateKey_nid_bio, i2d_PKCS8PrivateKey_nid_fp - PKCS#8 format
       private key functions

       libcrypto, -lcrypto

        #include <openssl/evp.h>

        EVP_PKEY *d2i_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY **x, pem_password_cb *cb, void *u);
        EVP_PKEY *d2i_PKCS8PrivateKey_fp(FILE *fp, EVP_PKEY **x, pem_password_cb *cb, void *u);

        int i2d_PKCS8PrivateKey_bio(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
                                    char *kstr, int klen,
                                    pem_password_cb *cb, void *u);

        int i2d_PKCS8PrivateKey_fp(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
                                   char *kstr, int klen,
                                   pem_password_cb *cb, void *u);

        int i2d_PKCS8PrivateKey_nid_bio(BIO *bp, EVP_PKEY *x, int nid,
                                        char *kstr, int klen,
                                        pem_password_cb *cb, void *u);

        int i2d_PKCS8PrivateKey_nid_fp(FILE *fp, EVP_PKEY *x, int nid,
                                       char *kstr, int klen,
                                       pem_password_cb *cb, void *u);

       The PKCS#8 functions encode and decode private keys in PKCS#8 format
       using both PKCS#5 v1.5 and PKCS#5 v2.0 password based encryption

       Other than the use of DER as opposed to PEM these functions are
       identical to the corresponding PEM function as described in

       These functions are currently the only way to store encrypted private
       keys using DER format.

       Currently all the functions use BIOs or FILE pointers, there are no
       functions which work directly on memory: this can be readily worked
       around by converting the buffers to memory BIOs, see BIO_s_mem(3) for

       These functions make no assumption regarding the pass phrase received
       from the password callback.  It will simply be treated as a byte

       d2i_PKCS8PrivateKey_bio() and d2i_PKCS8PrivateKey_fp() return a valid
       EVP_PKEY structure or NULL if an error occurred.

       i2d_PKCS8PrivateKey_bio(), i2d_PKCS8PrivateKey_fp(),
       i2d_PKCS8PrivateKey_nid_bio() and i2d_PKCS8PrivateKey_nid_fp() return 1
       on success or 0 on error.

       PEM_read_PrivateKey(3), passphrase-encoding(7)

       Copyright 2002-2018 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 LICENSE in the source distribution or at

1.1.1                             2018-09-17        d2i_PKCS8PrivateKey_bio(3)