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Diffstat (limited to 'secure/lib/libcrypto/man/man3/SSL_CTX_load_verify_locations.3')
| -rw-r--r-- | secure/lib/libcrypto/man/man3/SSL_CTX_load_verify_locations.3 | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/secure/lib/libcrypto/man/man3/SSL_CTX_load_verify_locations.3 b/secure/lib/libcrypto/man/man3/SSL_CTX_load_verify_locations.3 new file mode 100644 index 000000000000..47c67cc2f572 --- /dev/null +++ b/secure/lib/libcrypto/man/man3/SSL_CTX_load_verify_locations.3 @@ -0,0 +1,287 @@ +.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.39) +.\" +.\" Standard preamble: +.\" ======================================================================== +.de Sp \" Vertical space (when we can't use .PP) +.if t .sp .5v +.if n .sp +.. +.de Vb \" Begin verbatim text +.ft CW +.nf +.ne \\$1 +.. +.de Ve \" End verbatim text +.ft R +.fi +.. +.\" Set up some character translations and predefined strings. \*(-- will +.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left +.\" double quote, and \*(R" will give a right double quote. \*(C+ will +.\" give a nicer C++. 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Always turn off hyphenation; it makes +.\" way too many mistakes in technical documents. +.if n .ad l +.nh +.SH "NAME" +SSL_CTX_load_verify_locations, SSL_CTX_set_default_verify_paths, SSL_CTX_set_default_verify_dir, SSL_CTX_set_default_verify_file \- set default locations for trusted CA certificates +.SH "SYNOPSIS" +.IX Header "SYNOPSIS" +.Vb 1 +\& #include <openssl/ssl.h> +\& +\& int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile, +\& const char *CApath); +\& +\& int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx); +\& +\& int SSL_CTX_set_default_verify_dir(SSL_CTX *ctx); +\& +\& int SSL_CTX_set_default_verify_file(SSL_CTX *ctx); +.Ve +.SH "DESCRIPTION" +.IX Header "DESCRIPTION" +\&\fBSSL_CTX_load_verify_locations()\fR specifies the locations for \fBctx\fR, at +which \s-1CA\s0 certificates for verification purposes are located. The certificates +available via \fBCAfile\fR and \fBCApath\fR are trusted. +.PP +\&\fBSSL_CTX_set_default_verify_paths()\fR specifies that the default locations from +which \s-1CA\s0 certificates are loaded should be used. There is one default directory +and one default file. The default \s-1CA\s0 certificates directory is called \*(L"certs\*(R" in +the default OpenSSL directory. Alternatively the \s-1SSL_CERT_DIR\s0 environment +variable can be defined to override this location. The default \s-1CA\s0 certificates +file is called \*(L"cert.pem\*(R" in the default OpenSSL directory. Alternatively the +\&\s-1SSL_CERT_FILE\s0 environment variable can be defined to override this location. +.PP +\&\fBSSL_CTX_set_default_verify_dir()\fR is similar to +\&\fBSSL_CTX_set_default_verify_paths()\fR except that just the default directory is +used. +.PP +\&\fBSSL_CTX_set_default_verify_file()\fR is similar to +\&\fBSSL_CTX_set_default_verify_paths()\fR except that just the default file is +used. +.SH "NOTES" +.IX Header "NOTES" +If \fBCAfile\fR is not \s-1NULL,\s0 it points to a file of \s-1CA\s0 certificates in \s-1PEM\s0 +format. The file can contain several \s-1CA\s0 certificates identified by +.PP +.Vb 3 +\& \-\-\-\-\-BEGIN CERTIFICATE\-\-\-\-\- +\& ... (CA certificate in base64 encoding) ... +\& \-\-\-\-\-END CERTIFICATE\-\-\-\-\- +.Ve +.PP +sequences. Before, between, and after the certificates text is allowed +which can be used e.g. for descriptions of the certificates. +.PP +The \fBCAfile\fR is processed on execution of the \fBSSL_CTX_load_verify_locations()\fR +function. +.PP +If \fBCApath\fR is not \s-1NULL,\s0 it points to a directory containing \s-1CA\s0 certificates +in \s-1PEM\s0 format. The files each contain one \s-1CA\s0 certificate. The files are +looked up by the \s-1CA\s0 subject name hash value, which must hence be available. +If more than one \s-1CA\s0 certificate with the same name hash value exist, the +extension must be different (e.g. 9d66eef0.0, 9d66eef0.1 etc). The search +is performed in the ordering of the extension number, regardless of other +properties of the certificates. +Use the \fBc_rehash\fR utility to create the necessary links. +.PP +The certificates in \fBCApath\fR are only looked up when required, e.g. when +building the certificate chain or when actually performing the verification +of a peer certificate. +.PP +When looking up \s-1CA\s0 certificates, the OpenSSL library will first search the +certificates in \fBCAfile\fR, then those in \fBCApath\fR. Certificate matching +is done based on the subject name, the key identifier (if present), and the +serial number as taken from the certificate to be verified. If these data +do not match, the next certificate will be tried. If a first certificate +matching the parameters is found, the verification process will be performed; +no other certificates for the same parameters will be searched in case of +failure. +.PP +In server mode, when requesting a client certificate, the server must send +the list of CAs of which it will accept client certificates. This list +is not influenced by the contents of \fBCAfile\fR or \fBCApath\fR and must +explicitly be set using the +\&\fBSSL_CTX_set_client_CA_list\fR\|(3) +family of functions. +.PP +When building its own certificate chain, an OpenSSL client/server will +try to fill in missing certificates from \fBCAfile\fR/\fBCApath\fR, if the +certificate chain was not explicitly specified (see +\&\fBSSL_CTX_add_extra_chain_cert\fR\|(3), +\&\fBSSL_CTX_use_certificate\fR\|(3). +.SH "WARNINGS" +.IX Header "WARNINGS" +If several \s-1CA\s0 certificates matching the name, key identifier, and serial +number condition are available, only the first one will be examined. This +may lead to unexpected results if the same \s-1CA\s0 certificate is available +with different expiration dates. If a \*(L"certificate expired\*(R" verification +error occurs, no other certificate will be searched. Make sure to not +have expired certificates mixed with valid ones. +.SH "RETURN VALUES" +.IX Header "RETURN VALUES" +For SSL_CTX_load_verify_locations the following return values can occur: +.IP "0" 4 +The operation failed because \fBCAfile\fR and \fBCApath\fR are \s-1NULL\s0 or the +processing at one of the locations specified failed. Check the error +stack to find out the reason. +.IP "1" 4 +.IX Item "1" +The operation succeeded. +.PP +\&\fBSSL_CTX_set_default_verify_paths()\fR, \fBSSL_CTX_set_default_verify_dir()\fR and +\&\fBSSL_CTX_set_default_verify_file()\fR all return 1 on success or 0 on failure. A +missing default location is still treated as a success. +.SH "EXAMPLES" +.IX Header "EXAMPLES" +Generate a \s-1CA\s0 certificate file with descriptive text from the \s-1CA\s0 certificates +ca1.pem ca2.pem ca3.pem: +.PP +.Vb 5 +\& #!/bin/sh +\& rm CAfile.pem +\& for i in ca1.pem ca2.pem ca3.pem ; do +\& openssl x509 \-in $i \-text >> CAfile.pem +\& done +.Ve +.PP +Prepare the directory /some/where/certs containing several \s-1CA\s0 certificates +for use as \fBCApath\fR: +.PP +.Vb 2 +\& cd /some/where/certs +\& c_rehash . +.Ve +.SH "SEE ALSO" +.IX Header "SEE ALSO" +\&\fBssl\fR\|(7), +\&\fBSSL_CTX_set_client_CA_list\fR\|(3), +\&\fBSSL_get_client_CA_list\fR\|(3), +\&\fBSSL_CTX_use_certificate\fR\|(3), +\&\fBSSL_CTX_add_extra_chain_cert\fR\|(3), +\&\fBSSL_CTX_set_cert_store\fR\|(3), +\&\fBSSL_CTX_set_client_CA_list\fR\|(3) +.SH "COPYRIGHT" +.IX Header "COPYRIGHT" +Copyright 2000\-2019 The OpenSSL Project Authors. All Rights Reserved. +.PP +Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use +this file except in compliance with the License. You can obtain a copy +in the file \s-1LICENSE\s0 in the source distribution or at +<https://www.openssl.org/source/license.html>. |