5 EVP_PKEY_set1_RSA, EVP_PKEY_set1_DSA, EVP_PKEY_set1_DH, EVP_PKEY_set1_EC_KEY,
6 EVP_PKEY_get1_RSA, EVP_PKEY_get1_DSA, EVP_PKEY_get1_DH, EVP_PKEY_get1_EC_KEY,
7 EVP_PKEY_get0_RSA, EVP_PKEY_get0_DSA, EVP_PKEY_get0_DH, EVP_PKEY_get0_EC_KEY,
8 EVP_PKEY_assign_RSA, EVP_PKEY_assign_DSA, EVP_PKEY_assign_DH,
9 EVP_PKEY_assign_EC_KEY, EVP_PKEY_assign_POLY1305, EVP_PKEY_assign_SIPHASH,
10 EVP_PKEY_get0_hmac, EVP_PKEY_get0_poly1305, EVP_PKEY_get0_siphash,
11 EVP_PKEY_type, EVP_PKEY_id, EVP_PKEY_base_id, EVP_PKEY_set_alias_type,
12 EVP_PKEY_set1_engine, EVP_PKEY_get0_engine - EVP_PKEY assignment functions
16 #include <openssl/evp.h>
18 int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key);
19 int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key);
20 int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key);
21 int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key);
23 RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey);
24 DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey);
25 DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey);
26 EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey);
28 const unsigned char *EVP_PKEY_get0_hmac(const EVP_PKEY *pkey, size_t *len);
29 const unsigned char *EVP_PKEY_get0_poly1305(const EVP_PKEY *pkey, size_t *len);
30 const unsigned char *EVP_PKEY_get0_siphash(const EVP_PKEY *pkey, size_t *len);
31 RSA *EVP_PKEY_get0_RSA(const EVP_PKEY *pkey);
32 DSA *EVP_PKEY_get0_DSA(const EVP_PKEY *pkey);
33 DH *EVP_PKEY_get0_DH(const EVP_PKEY *pkey);
34 EC_KEY *EVP_PKEY_get0_EC_KEY(const EVP_PKEY *pkey);
36 int EVP_PKEY_assign_RSA(EVP_PKEY *pkey, RSA *key);
37 int EVP_PKEY_assign_DSA(EVP_PKEY *pkey, DSA *key);
38 int EVP_PKEY_assign_DH(EVP_PKEY *pkey, DH *key);
39 int EVP_PKEY_assign_EC_KEY(EVP_PKEY *pkey, EC_KEY *key);
40 int EVP_PKEY_assign_POLY1305(EVP_PKEY *pkey, ASN1_OCTET_STRING *key);
41 int EVP_PKEY_assign_SIPHASH(EVP_PKEY *pkey, ASN1_OCTET_STRING *key);
43 int EVP_PKEY_id(const EVP_PKEY *pkey);
44 int EVP_PKEY_base_id(const EVP_PKEY *pkey);
45 int EVP_PKEY_type(int type);
47 ENGINE *EVP_PKEY_get0_engine(const EVP_PKEY *pkey);
48 int EVP_PKEY_set1_engine(EVP_PKEY *pkey, ENGINE *engine);
50 Deprecated since OpenSSL 3.0, can be hidden entirely by defining
51 B<OPENSSL_API_COMPAT> with a suitable version value, see
52 L<openssl_user_macros(7)>:
54 int EVP_PKEY_set_alias_type(EVP_PKEY *pkey, int type);
58 EVP_PKEY_set1_RSA(), EVP_PKEY_set1_DSA(), EVP_PKEY_set1_DH() and
59 EVP_PKEY_set1_EC_KEY() set the key referenced by I<pkey> to I<key>.
61 EVP_PKEY_get1_RSA(), EVP_PKEY_get1_DSA(), EVP_PKEY_get1_DH() and
62 EVP_PKEY_get1_EC_KEY() return the referenced key in I<pkey> or NULL if the
63 key is not of the correct type. The returned key must be freed after use.
65 EVP_PKEY_get0_hmac(), EVP_PKEY_get0_poly1305(), EVP_PKEY_get0_siphash(),
66 EVP_PKEY_get0_RSA(), EVP_PKEY_get0_DSA(), EVP_PKEY_get0_DH() and
67 EVP_PKEY_get0_EC_KEY() return the referenced key in I<pkey> or NULL if the
68 key is not of the correct type but the reference count of the returned key
69 is B<not> incremented and so must not be freed after use.
71 EVP_PKEY_assign_RSA(), EVP_PKEY_assign_DSA(), EVP_PKEY_assign_DH(),
72 EVP_PKEY_assign_EC_KEY(), EVP_PKEY_assign_POLY1305() and
73 EVP_PKEY_assign_SIPHASH() set the referenced key to I<key> however these use
74 the supplied I<key> internally and so I<key> will be freed when the parent
77 EVP_PKEY_base_id() returns the type of I<pkey>. For example
78 an RSA key will return B<EVP_PKEY_RSA>.
80 EVP_PKEY_id() returns the actual OID associated with I<pkey>. Historically keys
81 using the same algorithm could use different OIDs. For example an RSA key could
82 use the OIDs corresponding to the NIDs B<NID_rsaEncryption> (equivalent to
83 B<EVP_PKEY_RSA>) or B<NID_rsa> (equivalent to B<EVP_PKEY_RSA2>). The use of
84 alternative non-standard OIDs is now rare so B<EVP_PKEY_RSA2> et al are not
85 often seen in practice.
87 EVP_PKEY_type() returns the underlying type of the NID I<type>. For example
88 EVP_PKEY_type(EVP_PKEY_RSA2) will return B<EVP_PKEY_RSA>.
90 EVP_PKEY_get0_engine() returns a reference to the ENGINE handling I<pkey>.
92 EVP_PKEY_set1_engine() sets the ENGINE handling I<pkey> to I<engine>. It
93 must be called after the key algorithm and components are set up.
94 If I<engine> does not include an B<EVP_PKEY_METHOD> for I<pkey> an
97 EVP_PKEY_set_alias_type() allows modifying a EVP_PKEY to use a
98 different set of algorithms than the default.
102 The following functions are only reliable with B<EVP_PKEY>s that have
103 been assigned an internal key with EVP_PKEY_assign_*():
105 EVP_PKEY_id(), EVP_PKEY_base_id(), EVP_PKEY_type(), EVP_PKEY_set_alias_type()
107 For EVP_PKEY key type checking purposes, L<EVP_PKEY_is_a(3)> is more generic.
111 In accordance with the OpenSSL naming convention the key obtained
112 from or assigned to the I<pkey> using the B<1> functions must be
113 freed as well as I<pkey>.
115 EVP_PKEY_assign_RSA(), EVP_PKEY_assign_DSA(), EVP_PKEY_assign_DH(),
116 EVP_PKEY_assign_EC_KEY(), EVP_PKEY_assign_POLY1305()
117 and EVP_PKEY_assign_SIPHASH() are implemented as macros.
119 EVP_PKEY_assign_EC_KEY() looks at the curve name id to determine if
120 the passed B<EC_KEY> is an L<SM2(7)> key, and will set the B<EVP_PKEY>
121 type to B<EVP_PKEY_SM2> in that case, instead of B<EVP_PKEY_EC>.
123 It's possible to switch back and forth between the types B<EVP_PKEY_EC>
124 and B<EVP_PKEY_SM2> with a call to EVP_PKEY_set_alias_type() on keys
125 assigned with this macro if it's desirable to do a normal EC
126 computations with the SM2 curve instead of the special SM2
127 computations, and vice versa.
129 Most applications wishing to know a key type will simply call
130 EVP_PKEY_base_id() and will not care about the actual type:
131 which will be identical in almost all cases.
133 Previous versions of this document suggested using EVP_PKEY_type(pkey->type)
134 to determine the type of a key. Since B<EVP_PKEY> is now opaque this
135 is no longer possible: the equivalent is EVP_PKEY_base_id(pkey).
137 EVP_PKEY_set1_engine() is typically used by an ENGINE returning an HSM
138 key as part of its routine to load a private key.
142 EVP_PKEY_set1_RSA(), EVP_PKEY_set1_DSA(), EVP_PKEY_set1_DH() and
143 EVP_PKEY_set1_EC_KEY() return 1 for success or 0 for failure.
145 EVP_PKEY_get1_RSA(), EVP_PKEY_get1_DSA(), EVP_PKEY_get1_DH() and
146 EVP_PKEY_get1_EC_KEY() return the referenced key or NULL if
149 EVP_PKEY_assign_RSA(), EVP_PKEY_assign_DSA(), EVP_PKEY_assign_DH(),
150 EVP_PKEY_assign_EC_KEY(), EVP_PKEY_assign_POLY1305()
151 and EVP_PKEY_assign_SIPHASH() return 1 for success and 0 for failure.
153 EVP_PKEY_base_id(), EVP_PKEY_id() and EVP_PKEY_type() return a key
154 type or B<NID_undef> (equivalently B<EVP_PKEY_NONE>) on error.
156 EVP_PKEY_set1_engine() returns 1 for success and 0 for failure.
158 EVP_PKEY_set_alias_type() returns 1 for success and 0 for error.
162 After loading an ECC key, it is possible to convert it to using SM2
163 algorithms with EVP_PKEY_set_alias_type:
165 EVP_PKEY_set_alias_type(pkey, EVP_PKEY_SM2);
169 L<EVP_PKEY_new(3)>, L<SM2(7)>
173 EVP_PKEY_set_alias_type() was deprecated in OpenSSL 3.0.
177 Copyright 2002-2020 The OpenSSL Project Authors. All Rights Reserved.
179 Licensed under the Apache License 2.0 (the "License"). You may not use
180 this file except in compliance with the License. You can obtain a copy
181 in the file LICENSE in the source distribution or at
182 L<https://www.openssl.org/source/license.html>.