NAME¶
d2i_Private_key, d2i_AutoPrivateKey, i2d_PrivateKey - decode and encode
functions for reading and saving EVP_PKEY structures.
SYNOPSIS¶
#include <openssl/evp.h>
EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp,
long length);
EVP_PKEY *d2i_AutoPrivateKey(EVP_PKEY **a, const unsigned char **pp,
long length);
int i2d_PrivateKey(EVP_PKEY *a, unsigned char **pp);
DESCRIPTION¶
d2i_PrivateKey() decodes a private key using algorithm
type. It
attempts to use any key specific format or PKCS#8 unencrypted PrivateKeyInfo
format. The
type parameter should be a public key algorithm constant
such as
EVP_PKEY_RSA. An error occurs if the decoded key does not match
type.
d2i_AutoPrivateKey() is similar to
d2i_PrivateKey() except it
attempts to automatically detect the private key format.
i2d_PrivateKey() encodes
key. It uses a key specific format or, if
none is defined for that key type, PKCS#8 unencrypted PrivateKeyInfo format.
These functions are similar to the
d2i_X509() functions, and you should
refer to that page for a detailed description (see
d2i_X509(3)).
NOTES¶
All these functions use DER format and unencrypted keys. Applications wishing to
encrypt or decrypt private keys should use other functions such as
d2i_PKC8PrivateKey() instead.
If the
*a is not NULL when calling
d2i_PrivateKey() or
d2i_AutoPrivateKey() (i.e. an existing structure is being reused) and
the key format is PKCS#8 then
*a will be freed and replaced on a
successful call.
RETURN VALUES¶
d2i_PrivateKey() and
d2i_AutoPrivateKey() return a valid
EVP_KEY structure or
NULL if an error occurs. The error code can
be obtained by calling
ERR_get_error(3).
i2d_PrivateKey() returns the number of bytes successfully encoded or a
negative value if an error occurs. The error code can be obtained by calling
ERR_get_error(3).
SEE ALSO¶
crypto(3),
d2i_PKCS8PrivateKey(3)