5 d2i_Private_key, d2i_AutoPrivateKey, i2d_PrivateKey - decode and encode
6 functions for reading and saving EVP_PKEY structures.
10 #include <openssl/evp.h>
12 EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp,
14 EVP_PKEY *d2i_AutoPrivateKey(EVP_PKEY **a, const unsigned char **pp,
16 int i2d_PrivateKey(EVP_PKEY *a, unsigned char **pp);
20 d2i_PrivateKey() decodes a private key using algorithm B<type>. It attempts to
21 use any key specific format or PKCS#8 unencrypted PrivateKeyInfo format. The
22 B<type> parameter should be a public key algorithm constant such as
23 B<EVP_PKEY_RSA>. An error occurs if the decoded key does not match B<type>.
25 d2i_AutoPrivateKey() is similar to d2i_PrivateKey() except it attempts to
26 automatically detect the private key format.
28 i2d_PrivateKey() encodes B<key>. It uses a key specific format or, if none is
29 defined for that key type, PKCS#8 unencrypted PrivateKeyInfo format.
31 These functions are similar to the d2i_X509() functions, and you should refer to
32 that page for a detailed description (see L<d2i_X509(3)>).
36 All these functions use DER format and unencrypted keys. Applications wishing
37 to encrypt or decrypt private keys should use other functions such as
38 d2i_PKC8PrivateKey() instead.
40 If the B<*a> is not NULL when calling d2i_PrivateKey() or d2i_AutoPrivateKey()
41 (i.e. an existing structure is being reused) and the key format is PKCS#8
42 then B<*a> will be freed and replaced on a successful call.
46 d2i_PrivateKey() and d2i_AutoPrivateKey() return a valid B<EVP_KEY> structure
47 or B<NULL> if an error occurs. The error code can be obtained by calling
50 i2d_PrivateKey() returns the number of bytes successfully encoded or a
51 negative value if an error occurs. The error code can be obtained by calling
57 L<d2i_PKCS8PrivateKey(3)>