5 X509_PUBKEY_new_ex, 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_ex(OSSL_LIB_CTX *libctx, const char *propq);
16 X509_PUBKEY *X509_PUBKEY_new(void);
17 void X509_PUBKEY_free(X509_PUBKEY *a);
18 X509_PUBKEY *X509_PUBKEY_dup(const X509_PUBKEY *a);
20 int X509_PUBKEY_set(X509_PUBKEY **x, EVP_PKEY *pkey);
21 EVP_PKEY *X509_PUBKEY_get0(const X509_PUBKEY *key);
22 EVP_PKEY *X509_PUBKEY_get(const X509_PUBKEY *key);
24 EVP_PKEY *d2i_PUBKEY_ex(EVP_PKEY **a, const unsigned char **pp, long length,
25 OSSL_LIB_CTX *libctx, const char *propq);
26 EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, long length);
27 int i2d_PUBKEY(const EVP_PKEY *a, unsigned char **pp);
29 EVP_PKEY *d2i_PUBKEY_bio(BIO *bp, EVP_PKEY **a);
30 EVP_PKEY *d2i_PUBKEY_fp(FILE *fp, EVP_PKEY **a);
32 int i2d_PUBKEY_fp(const FILE *fp, EVP_PKEY *pkey);
33 int i2d_PUBKEY_bio(BIO *bp, const EVP_PKEY *pkey);
35 int X509_PUBKEY_set0_param(X509_PUBKEY *pub, ASN1_OBJECT *aobj,
36 int ptype, void *pval,
37 unsigned char *penc, int penclen);
38 int X509_PUBKEY_get0_param(ASN1_OBJECT **ppkalg,
39 const unsigned char **pk, int *ppklen,
40 X509_ALGOR **pa, const X509_PUBKEY *pub);
41 int X509_PUBKEY_eq(X509_PUBKEY *a, X509_PUBKEY *b);
45 The B<X509_PUBKEY> structure represents the ASN.1 B<SubjectPublicKeyInfo>
46 structure defined in RFC5280 and used in certificates and certificate requests.
48 X509_PUBKEY_new_ex() allocates and initializes an B<X509_PUBKEY> structure
49 associated with the given B<OSSL_LIB_CTX> in the I<libctx> parameter. Any
50 algorithm fetches associated with using the B<X509_PUBKEY> object will use
51 the property query string I<propq>. See L<crypto(7)/ALGORITHM FETCHING> for
52 further information about algorithm fetching.
54 X509_PUBKEY_new() is the same as X509_PUBKEY_new_ex() except that the default
55 (NULL) B<OSSL_LIB_CTX> and a NULL property query string are used.
57 X509_PUBKEY_dup() creates a duplicate copy of the B<X509_PUBKEY> object
60 X509_PUBKEY_free() frees up B<X509_PUBKEY> structure I<a>. If I<a> is NULL
63 X509_PUBKEY_set() sets the public key in I<*x> to the public key contained
64 in the B<EVP_PKEY> structure I<pkey>. If I<*x> is not NULL any existing
65 public key structure will be freed.
67 X509_PUBKEY_get0() returns the public key contained in I<key>. The returned
68 value is an internal pointer which B<MUST NOT> be freed after use.
70 X509_PUBKEY_get() is similar to X509_PUBKEY_get0() except the reference
71 count on the returned key is incremented so it B<MUST> be freed using
72 EVP_PKEY_free() after use.
74 d2i_PUBKEY_ex() decodes an B<EVP_PKEY> structure using B<SubjectPublicKeyInfo>
75 format. Some public key decoding implementations may use cryptographic
76 algorithms. In this case the supplied library context I<libctx> and property
77 query string I<propq> are used.
78 d2i_PUBKEY() does the same as d2i_PUBKEY_ex() except that the default
79 library context and property query string are used.
81 i2d_PUBKEY() encodes an B<EVP_PKEY> structure using B<SubjectPublicKeyInfo>
84 d2i_PUBKEY_bio(), d2i_PUBKEY_fp(), i2d_PUBKEY_bio() and i2d_PUBKEY_fp() are
85 similar to d2i_PUBKEY() and i2d_PUBKEY() except they decode or encode using a
86 B<BIO> or B<FILE> pointer.
88 X509_PUBKEY_set0_param() sets the public key parameters of I<pub>. The
89 OID associated with the algorithm is set to I<aobj>. The type of the
90 algorithm parameters is set to I<type> using the structure I<pval>.
91 The encoding of the public key itself is set to the I<penclen>
92 bytes contained in buffer I<penc>. On success ownership of all the supplied
93 parameters is passed to I<pub> so they must not be freed after the
96 X509_PUBKEY_get0_param() retrieves the public key parameters from I<pub>,
97 I<*ppkalg> is set to the associated OID and the encoding consists of
98 I<*ppklen> bytes at I<*pk>, I<*pa> is set to the associated
99 AlgorithmIdentifier for the public key. If the value of any of these
100 parameters is not required it can be set to NULL. All of the
101 retrieved pointers are internal and must not be freed after the
104 X509_PUBKEY_eq() compares two B<X509_PUBKEY> values.
108 The B<X509_PUBKEY> functions can be used to encode and decode public keys
109 in a standard format.
111 In many cases applications will not call the B<X509_PUBKEY> functions
112 directly: they will instead call wrapper functions such as X509_get0_pubkey().
116 If the allocation fails, X509_PUBKEY_new() and X509_PUBKEY_dup() return
117 NULL and set an error code that can be obtained by L<ERR_get_error(3)>.
118 Otherwise they return a pointer to the newly allocated structure.
120 X509_PUBKEY_free() does not return a value.
122 X509_PUBKEY_get0() and X509_PUBKEY_get() return a pointer to an B<EVP_PKEY>
123 structure or NULL if an error occurs.
125 X509_PUBKEY_set(), X509_PUBKEY_set0_param() and X509_PUBKEY_get0_param()
126 return 1 for success and 0 if an error occurred.
128 X509_PUBKEY_eq() returns 1 for equal, 0 for different, and < 0 on error.
134 L<X509_get_pubkey(3)>,
138 The X509_PUBKEY_new_ex() and X509_PUBKEY_eq() functions were added in OpenSSL
143 Copyright 2016-2021 The OpenSSL Project Authors. All Rights Reserved.
145 Licensed under the Apache License 2.0 (the "License"). You may not use
146 this file except in compliance with the License. You can obtain a copy
147 in the file LICENSE in the source distribution or at
148 L<https://www.openssl.org/source/license.html>.