=head1 NAME
+SSL_get_ex_data_X509_STORE_CTX_idx,
SSL_CTX_set_verify, SSL_set_verify,
SSL_CTX_set_verify_depth, SSL_set_verify_depth,
-verify_cb
+SSL_verify_cb
- set peer certificate verification parameters
=head1 SYNOPSIS
#include <openssl/ssl.h>
- void SSL_CTX_set_verify(SSL_CTX *ctx, int mode, verify_cb verify_callback);
- void SSL_set_verify(SSL *s, int mode, verify_cb verify_callback);
+ void SSL_CTX_set_verify(SSL_CTX *ctx, int mode, SSL_verify_cb verify_callback);
+ void SSL_set_verify(SSL *s, int mode, SSL_verify_cb verify_callback);
+ SSL_get_ex_data_X509_STORE_CTX_idx(void);
+
void SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth);
void SSL_set_verify_depth(SSL *s, int depth);
- typedef int (*verify_cb)(int preverify_ok, X509_STORE_CTX *x509_ctx);
+
+ typedef int (*SSL_verify_cb)(int preverify_ok, X509_STORE_CTX *x509_ctx);
=head1 DESCRIPTION
this case last B<verify_callback> set specifically for this B<ssl> remains. If
no special B<callback> was set before, the default callback for the underlying
B<ctx> is used, that was valid at the time B<ssl> was created with
-L<SSL_new(3)>.
+L<SSL_new(3)>. Within the callback function,
+B<SSL_get_ex_data_X509_STORE_CTX_idx> can be called to get the data index
+of the current SSL object that is doing the verification.
SSL_CTX_set_verify_depth() sets the maximum B<depth> for the certificate chain
-verification that shall be allowed for B<ctx>. (See the BUGS section.)
+verification that shall be allowed for B<ctx>.
SSL_set_verify_depth() sets the maximum B<depth> for the certificate chain
-verification that shall be allowed for B<ssl>. (See the BUGS section.)
+verification that shall be allowed for B<ssl>.
=head1 NOTES
and the verify_callback() function, but the way this information is used
may be different.
-SSL_CTX_set_verify_depth() and SSL_set_verify_depth() set the limit up
-to which depth certificates in a chain are used during the verification
-procedure. If the certificate chain is longer than allowed, the certificates
-above the limit are ignored. Error messages are generated as if these
-certificates would not be present, most likely a
-X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY will be issued.
+SSL_CTX_set_verify_depth() and SSL_set_verify_depth() set a limit on the
+number of certificates between the end-entity and trust-anchor certificates.
+Neither the
+end-entity nor the trust-anchor certificates count against B<depth>. If the
+certificate chain needed to reach a trusted issuer is longer than B<depth+2>,
+X509_V_ERR_CERT_CHAIN_TOO_LONG will be issued.
The depth count is "level 0:peer certificate", "level 1: CA certificate",
"level 2: higher level CA certificate", and so on. Setting the maximum
-depth to 2 allows the levels 0, 1, and 2. The default depth limit is 100,
-allowing for the peer certificate and additional 100 CA certificates.
+depth to 2 allows the levels 0, 1, 2 and 3 (0 being the end-entity and 3 the
+trust-anchor).
+The default depth limit is 100,
+allowing for the peer certificate, at most 100 intermediate CA certificates and
+a final trust anchor certificate.
The B<verify_callback> function is used to control the behaviour when the
SSL_VERIFY_PEER flag is set. It must be supplied by the application and
The example makes use of the ex_data technique to store application data
into/retrieve application data from the SSL structure
-(see L<SSL_get_ex_new_index(3)>,
+(see L<CRYPTO_get_ex_new_index(3)>,
L<SSL_get_ex_data_X509_STORE_CTX_idx(3)>).
...
L<SSL_get_peer_certificate(3)>,
L<SSL_CTX_set_cert_verify_callback(3)>,
L<SSL_get_ex_data_X509_STORE_CTX_idx(3)>,
-L<SSL_get_ex_new_index(3)>
+L<CRYPTO_get_ex_new_index(3)>
=head1 COPYRIGHT
-Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
projects / openssl.git / blobdiff