D2I_PKCS8PRIVATEKEY_BIO(3)                            Library Functions Manual

NAME
     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

SYNOPSIS
     #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);

DESCRIPTION
     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
     algorithms.

     Other than the use of DER as opposed to PEM these functions are identical
     to the corresponding functions described in PEM_read_PrivateKey(3).

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

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

RETURN VALUES
     d2i_PKCS8PrivateKey_bio() and d2i_PKCS8PrivateKey_fp() return a EVP_PKEY
     object or NULL if an error occurs.

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

SEE ALSO
     d2i_X509_SIG(3), PEM_write_PKCS8PrivateKey(3), PKCS8_PRIV_KEY_INFO_new(3)

HISTORY
     These functions first appeared in OpenSSL 0.9.5 and have been available
     since OpenBSD 2.7.

CAVEATS
     Do not confuse these functions with i2d_PKCS8PrivateKeyInfo_bio(3) and
     i2d_PKCS8PrivateKeyInfo_fp(3), which write out private keys in
     unencrypted DER format.

Linux 6.8.7-arch1-1              June 7, 2019              Linux 6.8.7-arch1-1