bool mysql_ssl_set(MYSQL *mysql, const char *key, const char *cert, const char *ca, const char *capath, const char *cipher)
mysql_ssl_set() is used for
establishing encrypted connections using SSL. The
mysql argument must be a valid connection
handler. Any unused SSL arguments may be given as
be called before
mysql_ssl_set() does nothing
unless SSL support is enabled in the client library.
It is optional to call
mysql_ssl_set() to obtain an
encrypted connection because by default, MySQL programs
attempt to connect using encryption if the server supports
encrypted connections, falling back to an unencrypted
connection if an encrypted connection cannot be established
(see Configuring MySQL to Use Encrypted Connections).
mysql_ssl_set() may be useful
to applications that must specify particular certificate and
key files, encryption ciphers, and so forth.
mysql_ssl_set() specifies SSL
information such as certificate and key files for establishing
an encrypted connection if such connections are available, but
does not enforce any requirement that the connection obtained
be encrypted. To require an encrypted connection, use the
technique described in
Section 3.6.1, “Support for Encrypted Connections”.
For additional security relative to that provided by the default encryption, clients can supply a CA certificate matching the one used by the server and enable host name identity verification. In this way, the server and client place their trust in the same CA certificate and the client verifies that the host to which it connected is the one intended. For details, see Section 3.6.1, “Support for Encrypted Connections”.
mysql_ssl_set() is a
convenience function that is essentially equivalent to this
mysql_options(mysql, MYSQL_OPT_SSL_KEY, key); mysql_options(mysql, MYSQL_OPT_SSL_CERT, cert); mysql_options(mysql, MYSQL_OPT_SSL_CA, ca); mysql_options(mysql, MYSQL_OPT_SSL_CAPATH, capath); mysql_options(mysql, MYSQL_OPT_SSL_CIPHER, cipher);
Because of that equivalence, applications can, instead of
omitting calls for those options for which the option value is
encrypted-connection options not available using
mysql_ssl_set(), such as
MYSQL_OPT_SSL_MODE to specify the security
state of the connection, and
MYSQL_OPT_TLS_VERSION to specify the
protocols the client permits for encrypted connections.
mysql: The connection handler returned from
key: The path name of the client private key file.
cert: The path name of the client public key certificate file.
ca: The path name of the Certificate Authority (CA) certificate file. This option, if used, must specify the same certificate used by the server.
capath: The path name of the directory that contains trusted SSL CA certificate files.
cipher: The list of permissible ciphers for SSL encryption.
This function always returns
0. If SSL
setup is incorrect, a subsequent
returns an error when you attempt to connect.