1D2I_PRIVATEKEY(3ossl) OpenSSL D2I_PRIVATEKEY(3ossl)
2
6 d2i_PrivateKey_ex, d2i_PrivateKey, d2i_PublicKey, d2i_KeyParams,
7 d2i_AutoPrivateKey_ex, d2i_AutoPrivateKey, i2d_PrivateKey,
8 i2d_PublicKey, i2d_KeyParams, i2d_KeyParams_bio, d2i_PrivateKey_ex_bio,
9 d2i_PrivateKey_bio, d2i_PrivateKey_ex_fp, d2i_PrivateKey_fp,
10 d2i_KeyParams_bio, i2d_PrivateKey_bio, i2d_PrivateKey_fp - decode and
11 encode functions for reading and saving EVP_PKEY structures
12
14 #include <openssl/evp.h>
15 EVP_PKEY *d2i_PrivateKey_ex(int type, EVP_PKEY **a, const unsigned char **pp,
17 long length, OSSL_LIB_CTX *libctx,
18 const char *propq);
19 EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp,
20 long length);
21 EVP_PKEY *d2i_PublicKey(int type, EVP_PKEY **a, const unsigned char **pp,
22 long length);
23 EVP_PKEY *d2i_KeyParams(int type, EVP_PKEY **a, const unsigned char **pp,
24 long length);
25 EVP_PKEY *d2i_AutoPrivateKey_ex(EVP_PKEY **a, const unsigned char **pp,
26 long length, OSSL_LIB_CTX *libctx,
27 const char *propq);
28 EVP_PKEY *d2i_AutoPrivateKey(EVP_PKEY **a, const unsigned char **pp,
29 long length);
30 int i2d_PrivateKey(const EVP_PKEY *a, unsigned char **pp);
32 int i2d_PublicKey(const EVP_PKEY *a, unsigned char **pp);
33 int i2d_KeyParams(const EVP_PKEY *a, unsigned char **pp);
34 int i2d_KeyParams_bio(BIO *bp, const EVP_PKEY *pkey);
35 EVP_PKEY *d2i_KeyParams_bio(int type, EVP_PKEY **a, BIO *in);
36 #include <openssl/x509.h>
39 EVP_PKEY *d2i_PrivateKey_ex_bio(BIO *bp, EVP_PKEY **a, OSSL_LIB_CTX *libctx,
41 const char *propq);
42 EVP_PKEY *d2i_PrivateKey_bio(BIO *bp, EVP_PKEY **a);
43 EVP_PKEY *d2i_PrivateKey_ex_fp(FILE *fp, EVP_PKEY **a, OSSL_LIB_CTX *libctx,
44 const char *propq);
45 EVP_PKEY *d2i_PrivateKey_fp(FILE *fp, EVP_PKEY **a);
46 int i2d_PrivateKey_bio(BIO *bp, const EVP_PKEY *pkey);
48 int i2d_PrivateKey_fp(FILE *fp, const EVP_PKEY *pkey);
49
51 d2i_PrivateKey_ex() decodes a private key using algorithm type. It
52 attempts to use any key-specific format or PKCS#8 unencrypted
53 PrivateKeyInfo format. The type parameter should be a public key
54 algorithm constant such as EVP_PKEY_RSA. An error occurs if the decoded
55 key does not match type. Some private key decoding implementations may
56 use cryptographic algorithms (for example to automatically derive the
57 public key if it is not explicitly included in the encoding). In this
58 case the supplied library context libctx and property query string
59 propq are used. If successful and the a parameter is not NULL the
60 function assigns the returned EVP_PKEY structure pointer to *a,
61 overwriting any previous value.
62 d2i_PrivateKey() does the same as d2i_PrivateKey_ex() except that the
64 default library context and property query string are used.
65 d2i_PublicKey() does the same for public keys. d2i_KeyParams() does
66 the same for key parameters.
67 The d2i_PrivateKey_ex_bio() and d2i_PrivateKey_bio() functions are
69 similar to d2i_PrivateKey_ex() and d2i_PrivateKey() respectively except
70 that they decode the data read from the given BIO. The
71 d2i_PrivateKey_ex_fp() and d2i_PrivateKey_fp() functions are the same
72 except that they read the data from the given FILE.
73 d2i_AutoPrivateKey_ex() and d2i_AutoPrivateKey() are similar to
75 d2i_PrivateKey_ex() and d2i_PrivateKey() respectively except that they
76 attempt to automatically detect the private key format.
77 i2d_PrivateKey() encodes a. It uses a key specific format or, if none
79 is defined for that key type, PKCS#8 unencrypted PrivateKeyInfo format.
80 i2d_PublicKey() does the same for public keys. i2d_KeyParams() does
81 the same for key parameters. These functions are similar to the
82 d2i_X509() functions; see d2i_X509(3). i2d_PrivateKey_bio() and
83 i2d_PrivateKey_fp() do the same thing except that they encode to a BIO
84 or FILE respectively. Again, these work similarly to the functions
85 described in d2i_X509(3).
86
88 All the functions that operate on data in memory update the data
89 pointer *pp after a successful operation, just like the other d2i and
90 i2d functions; see d2i_X509(3).
91 All these functions use DER format and unencrypted keys. Applications
93 wishing to encrypt or decrypt private keys should use other functions
94 such as d2i_PKCS8PrivateKey() instead.
95 To decode a key with type EVP_PKEY_EC, d2i_PublicKey() requires *a to
97 be a non-NULL EVP_PKEY structure assigned an EC_KEY structure
98 referencing the proper EC_GROUP.
99
101 The d2i_PrivateKey_ex(), d2i_PrivateKey(), d2i_AutoPrivateKey_ex(),
102 d2i_AutoPrivateKey(), d2i_PrivateKey_ex_bio(), d2i_PrivateKey_bio(),
103 d2i_PrivateKey_ex_fp(), d2i_PrivateKey_fp(), d2i_PublicKey(),
104 d2i_KeyParams() and d2i_KeyParams_bio() functions return a valid
105 EVP_PKEY structure or NULL if an error occurs. The error code can be
106 obtained by calling ERR_get_error(3).
107 i2d_PrivateKey(), i2d_PublicKey() and i2d_KeyParams() return the number
109 of bytes successfully encoded or a negative value if an error occurs.
110 The error code can be obtained by calling ERR_get_error(3).
111 i2d_PrivateKey_bio(), i2d_PrivateKey_fp() and i2d_KeyParams_bio()
113 return 1 if successfully encoded or zero if an error occurs.
114
116 crypto(7), d2i_PKCS8PrivateKey_bio(3)
117
119 d2i_PrivateKey_ex(), d2i_PrivateKey_ex_bio(), d2i_PrivateKey_ex_fp(),
120 and d2i_AutoPrivateKey_ex() were added in OpenSSL 3.0.
121
123 Copyright 2017-2021 The OpenSSL Project Authors. All Rights Reserved.
124 Licensed under the Apache License 2.0 (the "License"). You may not use
126 this file except in compliance with the License. You can obtain a copy
127 in the file LICENSE in the source distribution or at
128 <https://www.openssl.org/source/license.html>.
1293.0.9 2023-07-27 D2I_PRIVATEKEY(3ossl)