1SSL_CTX_ADD1_CHAIN_CERT(3ossl) OpenSSL SSL_CTX_ADD1_CHAIN_CERT(3ossl)
2
6 SSL_CTX_set0_chain, SSL_CTX_set1_chain, SSL_CTX_add0_chain_cert,
7 SSL_CTX_add1_chain_cert, SSL_CTX_get0_chain_certs,
8 SSL_CTX_clear_chain_certs, SSL_set0_chain, SSL_set1_chain,
9 SSL_add0_chain_cert, SSL_add1_chain_cert, SSL_get0_chain_certs,
10 SSL_clear_chain_certs, SSL_CTX_build_cert_chain, SSL_build_cert_chain,
11 SSL_CTX_select_current_cert, SSL_select_current_cert,
12 SSL_CTX_set_current_cert, SSL_set_current_cert - extra chain
13 certificate processing
14
16 #include <openssl/ssl.h>
17 int SSL_CTX_set0_chain(SSL_CTX *ctx, STACK_OF(X509) *sk);
19 int SSL_CTX_set1_chain(SSL_CTX *ctx, STACK_OF(X509) *sk);
20 int SSL_CTX_add0_chain_cert(SSL_CTX *ctx, X509 *x509);
21 int SSL_CTX_add1_chain_cert(SSL_CTX *ctx, X509 *x509);
22 int SSL_CTX_get0_chain_certs(SSL_CTX *ctx, STACK_OF(X509) **sk);
23 int SSL_CTX_clear_chain_certs(SSL_CTX *ctx);
24 int SSL_set0_chain(SSL *ssl, STACK_OF(X509) *sk);
26 int SSL_set1_chain(SSL *ssl, STACK_OF(X509) *sk);
27 int SSL_add0_chain_cert(SSL *ssl, X509 *x509);
28 int SSL_add1_chain_cert(SSL *ssl, X509 *x509);
29 int SSL_get0_chain_certs(SSL *ssl, STACK_OF(X509) **sk);
30 int SSL_clear_chain_certs(SSL *ssl);
31 int SSL_CTX_build_cert_chain(SSL_CTX *ctx, flags);
33 int SSL_build_cert_chain(SSL *ssl, flags);
34 int SSL_CTX_select_current_cert(SSL_CTX *ctx, X509 *x509);
36 int SSL_select_current_cert(SSL *ssl, X509 *x509);
37 int SSL_CTX_set_current_cert(SSL_CTX *ctx, long op);
38 int SSL_set_current_cert(SSL *ssl, long op);
39
41 SSL_CTX_set0_chain() and SSL_CTX_set1_chain() set the certificate chain
42 associated with the current certificate of ctx to sk.
43 SSL_CTX_add0_chain_cert() and SSL_CTX_add1_chain_cert() append the
45 single certificate x509 to the chain associated with the current
46 certificate of ctx.
47 SSL_CTX_get0_chain_certs() retrieves the chain associated with the
49 current certificate of ctx.
50 SSL_CTX_clear_chain_certs() clears any existing chain associated with
52 the current certificate of ctx. (This is implemented by calling
53 SSL_CTX_set0_chain() with sk set to NULL).
54 SSL_CTX_build_cert_chain() builds the certificate chain for ctx.
56 Normally this uses the chain store or the verify store if the chain
57 store is not set. If the function is successful the built chain will
58 replace any existing chain. The flags parameter can be set to
59 SSL_BUILD_CHAIN_FLAG_UNTRUSTED to use existing chain certificates as
60 untrusted CAs, SSL_BUILD_CHAIN_FLAG_NO_ROOT to omit the root CA from
61 the built chain, SSL_BUILD_CHAIN_FLAG_CHECK to use all existing chain
62 certificates only to build the chain (effectively sanity checking and
63 rearranging them if necessary), the flag
64 SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR ignores any errors during
65 verification: if flag SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR is also set
66 verification errors are cleared from the error queue. Details of the
67 chain building process are described in "Certification Path Building"
68 in openssl-verification-options(1).
69 Each of these functions operates on the current end entity (i.e. server
71 or client) certificate. This is the last certificate loaded or selected
72 on the corresponding ctx structure.
73 SSL_CTX_select_current_cert() selects x509 as the current end entity
75 certificate, but only if x509 has already been loaded into ctx using a
76 function such as SSL_CTX_use_certificate().
77 SSL_set0_chain(), SSL_set1_chain(), SSL_add0_chain_cert(),
79 SSL_add1_chain_cert(), SSL_get0_chain_certs(), SSL_clear_chain_certs(),
80 SSL_build_cert_chain(), SSL_select_current_cert() and
81 SSL_set_current_cert() are similar except they apply to SSL structure
82 ssl.
83 SSL_CTX_set_current_cert() changes the current certificate to a value
85 based on the op argument. Currently op can be SSL_CERT_SET_FIRST to use
86 the first valid certificate or SSL_CERT_SET_NEXT to set the next valid
87 certificate after the current certificate. These two operations can be
88 used to iterate over all certificates in an SSL_CTX structure.
89 SSL_set_current_cert() also supports the option SSL_CERT_SET_SERVER.
91 If ssl is a server and has sent a certificate to a connected client
92 this option sets that certificate to the current certificate and
93 returns 1. If the negotiated cipher suite is anonymous (and thus no
94 certificate will be sent) 2 is returned and the current certificate is
95 unchanged. If ssl is not a server or a certificate has not been sent 0
96 is returned and the current certificate is unchanged.
97 All these functions are implemented as macros. Those containing a 1
99 increment the reference count of the supplied certificate or chain so
100 it must be freed at some point after the operation. Those containing a
101 0 do not increment reference counts and the supplied certificate or
102 chain MUST NOT be freed after the operation.
103
105 The chains associate with an SSL_CTX structure are copied to any SSL
106 structures when SSL_new() is called. SSL structures will not be
107 affected by any chains subsequently changed in the parent SSL_CTX.
108 One chain can be set for each key type supported by a server. So, for
110 example, an RSA and a DSA certificate can (and often will) have
111 different chains.
112 The functions SSL_CTX_build_cert_chain() and SSL_build_cert_chain() can
114 be used to check application configuration and to ensure any necessary
115 subordinate CAs are sent in the correct order. Misconfigured
116 applications sending incorrect certificate chains often cause problems
117 with peers.
118 For example an application can add any set of certificates using
120 SSL_CTX_use_certificate_chain_file() then call
121 SSL_CTX_build_cert_chain() with the option SSL_BUILD_CHAIN_FLAG_CHECK
122 to check and reorder them.
123 Applications can issue non fatal warnings when checking chains by
125 setting the flag SSL_BUILD_CHAIN_FLAG_IGNORE_ERRORS and checking the
126 return value.
127 Calling SSL_CTX_build_cert_chain() or SSL_build_cert_chain() is more
129 efficient than the automatic chain building as it is only performed
130 once. Automatic chain building is performed on each new session.
131 If any certificates are added using these functions no certificates
133 added using SSL_CTX_add_extra_chain_cert() will be used.
134
136 SSL_set_current_cert() with SSL_CERT_SET_SERVER return 1 for success, 2
137 if no server certificate is used because the cipher suites is anonymous
138 and 0 for failure.
139 SSL_CTX_build_cert_chain() and SSL_build_cert_chain() return 1 for
141 success and 0 for failure. If the flag
142 SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR and a verification error occurs then
143 2 is returned.
144 All other functions return 1 for success and 0 for failure.
146
148 ssl(7), SSL_CTX_add_extra_chain_cert(3)
149
151 These functions were added in OpenSSL 1.0.2.
152
154 Copyright 2013-2021 The OpenSSL Project Authors. All Rights Reserved.
155 Licensed under the Apache License 2.0 (the "License"). You may not use
157 this file except in compliance with the License. You can obtain a copy
158 in the file LICENSE in the source distribution or at
159 <https://www.openssl.org/source/license.html>.
1603.0.9 2023-07-27 SSL_CTX_ADD1_CHAIN_CERT(3ossl)