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    Command:

    SSL_CTX_load_verify_locations

    
    
    
    

    SYNOPSIS

            #include <openssl/ssl.h>
    
            int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
                                              const char *CApath);
    
    
    

    DESCRIPTION

           SSL_CTX_load_verify_locations() specifies the locations for ctx, at
           which CA certificates for verification purposes are located. The
           certificates available via CAfile and CApath are trusted.
    
    
    

    NOTES

           If CAfile is not NULL, it points to a file of CA certificates in PEM
           format. The file can contain several CA certificates identified by
    
            -----BEGIN CERTIFICATE-----
            ... (CA certificate in base64 encoding) ...
            -----END CERTIFICATE-----
    
           sequences. Before, between, and after the certificates text is allowed
           which can be used e.g. for descriptions of the certificates.
    
           The CAfile is processed on execution of the
           SSL_CTX_load_verify_locations() function.
    
           If CApath is not NULL, it points to a directory containing CA
           certificates in PEM format. The files each contain one CA certificate.
           The files are looked up by the CA subject name hash value, which must
           hence be available.  If more than one CA 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 c_rehash utility to create the necessary links.
    
           The certificates in CApath are only looked up when required, e.g. when
           building the certificate chain or when actually performing the
           verification of a peer certificate.
    
           When looking up CA certificates, the OpenSSL library will first search
           the certificates in CAfile, then those in CApath. 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.
    
           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 CAfile or CApath and must
           explicitly be set using the SSL_CTX_set_client_CA_list(3) family of
           valid ones.
    
    
    

    EXAMPLES

           Generate a CA certificate file with descriptive text from the CA
           certificates ca1.pem ca2.pem ca3.pem:
    
            #!/bin/sh
            rm CAfile.pem
            for i in ca1.pem ca2.pem ca3.pem ; do
              openssl x509 -in $i -text >> CAfile.pem
            done
    
           Prepare the directory /some/where/certs containing several CA
           certificates for use as CApath:
    
            cd /some/where/certs
            c_rehash .
    
    
    

    RETURN VALUES

           The following return values can occur:
    
           0   The operation failed because CAfile and CApath are NULL or the
               processing at one of the locations specified failed. Check the
               error stack to find out the reason.
    
           1   The operation succeeded.
    
    
    

    SEE ALSO

           ssl(3), SSL_CTX_set_client_CA_list(3), SSL_get_client_CA_list(3),
           SSL_CTX_use_certificate(3), SSL_CTX_add_extra_chain_cert(3),
           SSL_CTX_set_cert_store(3)
    
    
    

    1.0.1e 2016-01-07 SSL_CTX_load_verify_locations(3)

    
    
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