D2I_PKCS8PRIVATEKEY_BIO(3)

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).

Before using these functions, 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.

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.