.\" $OpenBSD: d2i_PKCS8PrivateKey_bio.3,v 1.9 2018/02/16 17:54:23 schwarze Exp $ .\" full merge up to: OpenSSL 61f805c1 Jan 16 01:01:46 2018 +0800 .\" .\" This file was written by Dr. Stephen Henson . .\" Copyright (c) 2002, 2016, 2017 The OpenSSL Project. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in .\" the documentation and/or other materials provided with the .\" distribution. .\" .\" 3. 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IN NO EVENT SHALL THE OpenSSL PROJECT OR .\" ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, .\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT .\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; .\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, .\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED .\" OF THE POSSIBILITY OF SUCH DAMAGE. .\" .Dd $Mdocdate: February 16 2018 $ .Dt D2I_PKCS8PRIVATEKEY_BIO 3 .Os .Sh NAME .Nm d2i_PKCS8PrivateKey_bio , .Nm d2i_PKCS8PrivateKey_fp , .Nm i2d_PKCS8PrivateKey_bio , .Nm i2d_PKCS8PrivateKey_fp , .Nm i2d_PKCS8PrivateKey_nid_bio , .Nm i2d_PKCS8PrivateKey_nid_fp .Nd PKCS#8 format private key functions .Sh SYNOPSIS .In openssl/evp.h .Ft EVP_PKEY * .Fo d2i_PKCS8PrivateKey_bio .Fa "BIO *bp" .Fa "EVP_PKEY **x" .Fa "pem_password_cb *cb" .Fa "void *u" .Fc .Ft EVP_PKEY * .Fo d2i_PKCS8PrivateKey_fp .Fa "FILE *fp" .Fa "EVP_PKEY **x" .Fa "pem_password_cb *cb" .Fa "void *u" .Fc .Ft int .Fo i2d_PKCS8PrivateKey_bio .Fa "BIO *bp" .Fa "EVP_PKEY *x" .Fa "const EVP_CIPHER *enc" .Fa "char *kstr" .Fa "int klen" .Fa "pem_password_cb *cb" .Fa "void *u" .Fc .Ft int .Fo i2d_PKCS8PrivateKey_fp .Fa "FILE *fp" .Fa "EVP_PKEY *x" .Fa "const EVP_CIPHER *enc" .Fa "char *kstr" .Fa "int klen" .Fa "pem_password_cb *cb" .Fa "void *u" .Fc .Ft int .Fo i2d_PKCS8PrivateKey_nid_bio .Fa "BIO *bp" .Fa "EVP_PKEY *x" .Fa "int nid" .Fa "char *kstr" .Fa "int klen" .Fa "pem_password_cb *cb" .Fa "void *u" .Fc .Ft int .Fo i2d_PKCS8PrivateKey_nid_fp .Fa "FILE *fp" .Fa "EVP_PKEY *x" .Fa "int nid" .Fa "char *kstr" .Fa "int klen" .Fa "pem_password_cb *cb" .Fa "void *u" .Fc .Sh 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. .Pp Other than the use of DER as opposed to PEM these functions are identical to the corresponding functions described in .Xr PEM_read_PrivateKey 3 . .Pp Before using these functions, .Xr OpenSSL_add_all_algorithms 3 should be called to initialize the internal algorithm lookup tables. Otherwise errors about unknown algorithms will occur if an attempt is made to decrypt a private key. .Pp These functions are currently the only way to store encrypted private keys using DER format. .Pp Currently all the functions use .Vt BIO or .Vt 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 .Xr BIO_s_mem 3 for details. .Sh RETURN VALUES .Fn d2i_PKCS8PrivateKey_bio and .Fn d2i_PKCS8PrivateKey_fp return a .Vt EVP_PKEY object or .Dv NULL if an error occurs. .Pp .Fn i2d_PKCS8PrivateKey_bio , .Fn i2d_PKCS8PrivateKey_fp , .Fn i2d_PKCS8PrivateKey_nid_bio , and .Fn i2d_PKCS8PrivateKey_nid_fp return 1 on success or 0 on error. .Sh SEE ALSO .Xr d2i_X509_SIG 3 , .Xr PEM_write_PKCS8PrivateKey 3 , .Xr PKCS8_PRIV_KEY_INFO_new 3 .Sh CAVEATS Do not confuse these functions with .Xr i2d_PKCS8PrivateKeyInfo_bio 3 and .Xr i2d_PKCS8PrivateKeyInfo_fp 3 , which write out private keys in .Sy unencrypted DER format.