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.IX Title "d2i_PKCS8PrivateKey 3"
.TH d2i_PKCS8PrivateKey 3 "2019-12-20" "1.0.2u" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "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
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #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);
.Ve
.SH "DESCRIPTION"
.IX Header "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 \s-1DER\s0 as opposed to \s-1PEM\s0 these functions are identical to the
corresponding \fB\s-1PEM\s0\fR function as described in the \fBpem\fR\|(3) manual page.
.SH "NOTES"
.IX Header "NOTES"
Before using these functions \fBOpenSSL_add_all_algorithms\fR\|(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 \s-1DER\s0 format.
.PP
Currently all the functions use BIOs or \s-1FILE\s0 pointers, there are no functions which
work directly on memory: this can be readily worked around by converting the buffers
to memory BIOs, see \fBBIO_s_mem\fR\|(3) for details.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBpem\fR\|(3)