1d2i_PrivateKey(3)                   OpenSSL                  d2i_PrivateKey(3)
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NAME

6       d2i_Private_key, d2i_AutoPrivateKey, i2d_PrivateKey - decode and encode
7       functions for reading and saving EVP_PKEY structures.
8

SYNOPSIS

10        #include <openssl/evp.h>
11
12        EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp,
13                                 long length);
14        EVP_PKEY *d2i_AutoPrivateKey(EVP_PKEY **a, const unsigned char **pp,
15                                     long length);
16        int i2d_PrivateKey(EVP_PKEY *a, unsigned char **pp);
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DESCRIPTION

19       d2i_PrivateKey() decodes a private key using algorithm type. It
20       attempts to use any key specific format or PKCS#8 unencrypted
21       PrivateKeyInfo format. The type parameter should be a public key
22       algorithm constant such as EVP_PKEY_RSA. An error occurs if the decoded
23       key does not match type.
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25       d2i_AutoPrivateKey() is similar to d2i_PrivateKey() except it attempts
26       to automatically detect the private key format.
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28       i2d_PrivateKey() encodes key. It uses a key specific format or, if none
29       is defined for that key type, PKCS#8 unencrypted PrivateKeyInfo format.
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31       These functions are similar to the d2i_X509() functions, and you should
32       refer to that page for a detailed description (see d2i_X509(3)).
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NOTES

35       All these functions use DER format and unencrypted keys. Applications
36       wishing to encrypt or decrypt private keys should use other functions
37       such as d2i_PKC8PrivateKey() instead.
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39       If the *a is not NULL when calling d2i_PrivateKey() or
40       d2i_AutoPrivateKey() (i.e. an existing structure is being reused) and
41       the key format is PKCS#8 then *a will be freed and replaced on a
42       successful call.
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RETURN VALUES

45       d2i_PrivateKey() and d2i_AutoPrivateKey() return a valid EVP_KEY
46       structure or NULL if an error occurs. The error code can be obtained by
47       calling ERR_get_error(3).
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49       i2d_PrivateKey() returns the number of bytes successfully encoded or a
50       negative value if an error occurs. The error code can be obtained by
51       calling ERR_get_error(3).
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SEE ALSO

54       crypto(3), d2i_PKCS8PrivateKey(3)
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581.0.2o                            2020-08-01                 d2i_PrivateKey(3)
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