5 X509_PUBKEY_new, X509_PUBKEY_free, X509_PUBKEY_dup,
6 X509_PUBKEY_set, X509_PUBKEY_get0, X509_PUBKEY_get,
7 d2i_PUBKEY_ex, d2i_PUBKEY, i2d_PUBKEY, d2i_PUBKEY_bio, d2i_PUBKEY_fp,
8 i2d_PUBKEY_fp, i2d_PUBKEY_bio, X509_PUBKEY_set0_param, X509_PUBKEY_get0_param,
9 X509_PUBKEY_eq - SubjectPublicKeyInfo public key functions
13 #include <openssl/x509.h>
15 X509_PUBKEY *X509_PUBKEY_new(void);
16 void X509_PUBKEY_free(X509_PUBKEY *a);
17 X509_PUBKEY *X509_PUBKEY_dup(const X509_PUBKEY *a);
19 int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey);
20 EVP_PKEY *X509_PUBKEY_get0(const X509_PUBKEY *key);
21 EVP_PKEY *X509_PUBKEY_get(const X509_PUBKEY *key);
23 EVP_PKEY *d2i_PUBKEY_ex(EVP_PKEY **a, const unsigned char **pp, long length,
24 OPENSSL_CTX *libctx, const char *propq);
25 EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, long length);
26 int i2d_PUBKEY(const EVP_PKEY *a, unsigned char **pp);
28 EVP_PKEY *d2i_PUBKEY_bio(BIO *bp, EVP_PKEY **a);
29 EVP_PKEY *d2i_PUBKEY_fp(FILE *fp, EVP_PKEY **a);
31 int i2d_PUBKEY_fp(const FILE *fp, EVP_PKEY *pkey);
32 int i2d_PUBKEY_bio(BIO *bp, const EVP_PKEY *pkey);
34 int X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj,
35 int ptype, void *pval,
36 unsigned char *penc, int penclen);
37 int X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg,
38 const unsigned char **pk, int *ppklen,
39 X509_ALGOR **pa, const X509_PUBKEY *pub);
40 int X509_PUBKEY_eq(X509_PUBKEY *a, X509_PUBKEY *b);
44 The B<X509_PUBKEY> structure represents the ASN.1 B<SubjectPublicKeyInfo>
45 structure defined in RFC5280 and used in certificates and certificate requests.
47 X509_PUBKEY_new() allocates and initializes an B<X509_PUBKEY> structure.
49 X509_PUBKEY_free() frees up B<X509_PUBKEY> structure B<a>. If B<a> is NULL
52 X509_PUBKEY_set() sets the public key in B<*x> to the public key contained
53 in the B<EVP_PKEY> structure B<pkey>. If B<*x> is not NULL any existing
54 public key structure will be freed.
56 X509_PUBKEY_get0() returns the public key contained in B<key>. The returned
57 value is an internal pointer which B<MUST NOT> be freed after use.
59 X509_PUBKEY_get() is similar to X509_PUBKEY_get0() except the reference
60 count on the returned key is incremented so it B<MUST> be freed using
61 EVP_PKEY_free() after use.
63 d2i_PUBKEY_ex() decodes an B<EVP_PKEY> structure using B<SubjectPublicKeyInfo>
64 format. Some public key decoding implementations may use cryptographic
65 algorithms. In this case the supplied library context I<libctx> and property
66 query string I<propq> are used.
67 d2i_PUBKEY() does the same as d2i_PUBKEY_ex() except that the default
68 library context and property query string are used.
70 i2d_PUBKEY() encodes an B<EVP_PKEY> structure using B<SubjectPublicKeyInfo>
73 d2i_PUBKEY_bio(), d2i_PUBKEY_fp(), i2d_PUBKEY_bio() and i2d_PUBKEY_fp() are
74 similar to d2i_PUBKEY() and i2d_PUBKEY() except they decode or encode using a
75 B<BIO> or B<FILE> pointer.
77 X509_PUBKEY_set0_param() sets the public key parameters of B<pub>. The
78 OID associated with the algorithm is set to B<aobj>. The type of the
79 algorithm parameters is set to B<type> using the structure B<pval>.
80 The encoding of the public key itself is set to the B<penclen>
81 bytes contained in buffer B<penc>. On success ownership of all the supplied
82 parameters is passed to B<pub> so they must not be freed after the
85 X509_PUBKEY_get0_param() retrieves the public key parameters from B<pub>,
86 B<*ppkalg> is set to the associated OID and the encoding consists of
87 B<*ppklen> bytes at B<*pk>, B<*pa> is set to the associated
88 AlgorithmIdentifier for the public key. If the value of any of these
89 parameters is not required it can be set to B<NULL>. All of the
90 retrieved pointers are internal and must not be freed after the
93 X509_PUBKEY_eq() compares two B<X509_PUBKEY> values.
97 The B<X509_PUBKEY> functions can be used to encode and decode public keys
100 In many cases applications will not call the B<X509_PUBKEY> functions
101 directly: they will instead call wrapper functions such as X509_get0_pubkey().
105 If the allocation fails, X509_PUBKEY_new() returns B<NULL> and sets an error
106 code that can be obtained by L<ERR_get_error(3)>.
108 Otherwise it returns a pointer to the newly allocated structure.
110 X509_PUBKEY_free() does not return a value.
112 X509_PUBKEY_get0() and X509_PUBKEY_get() return a pointer to an B<EVP_PKEY>
113 structure or B<NULL> if an error occurs.
115 X509_PUBKEY_set(), X509_PUBKEY_set0_param() and X509_PUBKEY_get0_param()
116 return 1 for success and 0 if an error occurred.
118 X509_PUBKEY_eq() returns 1 for equal, 0 for different, and < 0 on error.
124 L<X509_get_pubkey(3)>,
128 The X509_PUBKEY_eq() function was added in OpenSSL 3.0.
132 Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
134 Licensed under the Apache License 2.0 (the "License"). You may not use
135 this file except in compliance with the License. You can obtain a copy
136 in the file LICENSE in the source distribution or at
137 L<https://www.openssl.org/source/license.html>.