An SSLContext is used to set various options regarding certificates, algorithms, verification, session caching, etc. The SSLContext is used to create an SSLSocket.
All attributes must be set before creating an SSLSocket as the SSLContext will be frozen afterward.
No session caching for client or server
Client sessions are added to the session cache
Server sessions are added to the session cache
Both client and server sessions are added to the session cache
Normally the session cache is checked for expired sessions every 255 connections. Since this may lead to a delay that cannot be controlled, the automatic flushing may be disabled and flush_sessions can be called explicitly.
Always perform external lookups of sessions even if they are in the internal cache.
This flag has no effect on clients
Never automatically store sessions in the internal store.
Enables both SESSION_CACHE_NO_INTERNAL_LOOKUP and SESSION_CACHE_NO_INTERNAL_STORE.
The list of available SSL/TLS methods
A callback invoked when DH parameters are required.
The callback is invoked with the Session for the key exchange, an flag indicating the use of an export cipher and the keylength required.
The callback must return an OpenSSL::PKey::DH instance of the correct key length.
A callback invoked at connect time to distinguish between multiple server names.
The callback is invoked with an SSLSocket and a server name. The callback must return an SSLContext for the server name or nil.
Context certificate
Context private key
A certificate or Array of certificates that will be sent to the client.
The path to a file containing a PEM-format CA certificate
The path to a directory containing CA certificates in PEM format.
Files are looked up by subject’s X509 name’s hash value.
Maximum session lifetime in seconds.
Maximum session lifetime in seconds.
Session verification mode.
Valid modes are VERIFY_NONE, VERIFY_PEER, VERIFY_CLIENT_ONCE, VERIFY_FAIL_IF_NO_PEER_CERT and defined on OpenSSL::SSL
The default mode is VERIFY_NONE, which does not perform any verification at all.
See SSL_CTX_set_verify(3) for details.
Number of CA certificates to walk when verifying a certificate chain.
A callback for additional certificate verification. The callback is invoked for each certificate in the chain.
The callback is invoked with two values. preverify_ok indicates indicates if the verification was passed (true) or not (false). store_context is an OpenSSL::X509::StoreContext containing the context used for certificate verification.
If the callback returns false, the chain verification is immediately stopped and a bad_certificate alert is then sent.
Whether to check the server certificate is valid for the hostname.
In order to make this work, verify_mode must be set to VERIFY_PEER and the server hostname must be given by OpenSSL::SSL::SSLSocket#hostname=.
An OpenSSL::X509::Store used for certificate verification.
An Array of extra X509 certificates to be added to the certificate chain.
A callback invoked when a client certificate is requested by a server and no certificate has been set.
The callback is invoked with a Session and must return an Array containing an OpenSSL::X509::Certificate and an OpenSSL::PKey. If any other value is returned the handshake is suspended.
A callback invoked when ECDH parameters are required.
The callback is invoked with the Session for the key exchange, an flag indicating the use of an export cipher and the keylength required.
The callback is deprecated. This does not work with recent versions of OpenSSL. Use OpenSSL::SSL::SSLContext#ecdh_curves= instead.
Sets the context in which a session can be reused. This allows sessions for multiple applications to be distinguished, for example, by name.
A callback invoked when a new session was negotiated.
The callback is invoked with an SSLSocket. If false is returned the session will be removed from the internal cache.
A callback invoked when a session is removed from the internal cache.
The callback is invoked with an SSLContext and a Session.
IMPORTANT NOTE: It is currently not possible to use this safely in a multi-threaded application. The callback is called inside a global lock and it can randomly cause deadlock on Ruby thread switching.
A callback invoked whenever a new handshake is initiated. May be used to disable renegotiation entirely.
The callback is invoked with the active SSLSocket. The callback’s return value is irrelevant, normal return indicates “approval” of the renegotiation and will continue the process. To forbid renegotiation and to cancel the process, an Error may be raised within the callback.
Disable client renegotiation
When running a server, it is often desirable to disable client renegotiation entirely. You may use a callback as follows to implement this feature:
num_handshakes = 0 ctx.renegotiation_cb = lambda do |ssl| num_handshakes += 1 raise RuntimeError.new("Client renegotiation disabled") if num_handshakes > 1 end
An Enumerable of Strings. Each String represents a protocol to be advertised as the list of supported protocols for Next Protocol Negotiation. Supported in OpenSSL 1.0.1 and higher. Has no effect on the client side. If not set explicitly, the NPN extension will not be sent by the server in the handshake.
Example
ctx.npn_protocols = ["http/1.1", "spdy/2"]
A callback invoked on the client side when the client needs to select a protocol from the list sent by the server. Supported in OpenSSL 1.0.1 and higher. The client MUST select a protocol of those advertised by the server. If none is acceptable, raising an error in the callback will cause the handshake to fail. Not setting this callback explicitly means not supporting the NPN extension on the client - any protocols advertised by the server will be ignored.
Example
ctx.npn_select_cb = lambda do |protocols| # inspect the protocols and select one protocols.first end
An Enumerable of Strings. Each String represents a protocol to be advertised as the list of supported protocols for Application-Layer Protocol Negotiation. Supported in OpenSSL 1.0.2 and higher. Has no effect on the server side. If not set explicitly, the ALPN extension will not be included in the handshake.
Example
ctx.alpn_protocols = ["http/1.1", "spdy/2", "h2"]
A callback invoked on the server side when the server needs to select a protocol from the list sent by the client. Supported in OpenSSL 1.0.2 and higher. The callback must return a protocol of those advertised by the client. If none is acceptable, raising an error in the callback will cause the handshake to fail. Not setting this callback explicitly means not supporting the ALPN extension on the server - any protocols advertised by the client will be ignored.
Example
ctx.alpn_select_cb = lambda do |protocols| # inspect the protocols and select one protocols.first end
# File tmp/rubies/ruby-2.4.10/ext/openssl/lib/openssl/ssl.rb, line 98
def initialize(version = nil)
self.options |= OpenSSL::SSL::OP_ALL
self.ssl_version = version if version
end
You can get a list of valid methods with OpenSSL::SSL::SSLContext::METHODS
static VALUE
ossl_sslctx_get_ciphers(VALUE self)
{
SSL_CTX *ctx;
STACK_OF(SSL_CIPHER) *ciphers;
const SSL_CIPHER *cipher;
VALUE ary;
int i, num;
GetSSLCTX(self, ctx);
ciphers = SSL_CTX_get_ciphers(ctx);
if (!ciphers)
return rb_ary_new();
num = sk_SSL_CIPHER_num(ciphers);
ary = rb_ary_new2(num);
for(i = 0; i < num; i++){
cipher = sk_SSL_CIPHER_value(ciphers, i);
rb_ary_push(ary, ossl_ssl_cipher_to_ary(cipher));
}
return ary;
}
The list of cipher suites configured for this context.
static VALUE
ossl_sslctx_set_ciphers(VALUE self, VALUE v)
{
SSL_CTX *ctx;
VALUE str, elem;
int i;
rb_check_frozen(self);
if (NIL_P(v))
return v;
else if (RB_TYPE_P(v, T_ARRAY)) {
str = rb_str_new(0, 0);
for (i = 0; i < RARRAY_LEN(v); i++) {
elem = rb_ary_entry(v, i);
if (RB_TYPE_P(elem, T_ARRAY)) elem = rb_ary_entry(elem, 0);
elem = rb_String(elem);
rb_str_append(str, elem);
if (i < RARRAY_LEN(v)-1) rb_str_cat2(str, ":");
}
} else {
str = v;
StringValue(str);
}
GetSSLCTX(self, ctx);
if (!SSL_CTX_set_cipher_list(ctx, StringValueCStr(str))) {
ossl_raise(eSSLError, "SSL_CTX_set_cipher_list");
}
return v;
}
Sets the list of available cipher suites for this context. Note in a server context some ciphers require the appropriate certificates. For example, an RSA cipher suite can only be chosen when an RSA certificate is available.
static VALUE
ossl_sslctx_set_ecdh_curves(VALUE self, VALUE arg)
{
SSL_CTX *ctx;
rb_check_frozen(self);
GetSSLCTX(self, ctx);
StringValueCStr(arg);
#if defined(HAVE_SSL_CTX_SET1_CURVES_LIST)
if (!SSL_CTX_set1_curves_list(ctx, RSTRING_PTR(arg)))
ossl_raise(eSSLError, NULL);
#else
/* OpenSSL does not have SSL_CTX_set1_curves_list()... Fallback to
* SSL_CTX_set_tmp_ecdh(). So only the first curve is used. */
{
VALUE curve, splitted;
EC_KEY *ec;
int nid;
splitted = rb_str_split(arg, ":");
if (!RARRAY_LEN(splitted))
ossl_raise(eSSLError, "invalid input format");
curve = RARRAY_AREF(splitted, 0);
StringValueCStr(curve);
/* SSL_CTX_set1_curves_list() accepts NIST names */
nid = EC_curve_nist2nid(RSTRING_PTR(curve));
if (nid == NID_undef)
nid = OBJ_txt2nid(RSTRING_PTR(curve));
if (nid == NID_undef)
ossl_raise(eSSLError, "unknown curve name");
ec = EC_KEY_new_by_curve_name(nid);
if (!ec)
ossl_raise(eSSLError, NULL);
EC_KEY_set_asn1_flag(ec, OPENSSL_EC_NAMED_CURVE);
if (!SSL_CTX_set_tmp_ecdh(ctx, ec)) {
EC_KEY_free(ec);
ossl_raise(eSSLError, "SSL_CTX_set_tmp_ecdh");
}
EC_KEY_free(ec);
# if defined(HAVE_SSL_CTX_SET_ECDH_AUTO)
/* tmp_ecdh and ecdh_auto conflict. tmp_ecdh is ignored when ecdh_auto
* is enabled. So disable ecdh_auto. */
if (!SSL_CTX_set_ecdh_auto(ctx, 0))
ossl_raise(eSSLError, "SSL_CTX_set_ecdh_auto");
# endif
}
#endif
return arg;
}
Sets the list of “supported elliptic curves” for this context.
For a TLS client, the list is directly used in the Supported Elliptic Curves Extension. For a server, the list is used by OpenSSL to determine the set of shared curves. OpenSSL will pick the most appropriate one from it.
Note that this works differently with old OpenSSL (<= 1.0.1). Only one curve can be set, and this has no effect for TLS clients.
Example
ctx1 = OpenSSL::SSL::SSLContext.new ctx1.ecdh_curves = "X25519:P-256:P-224" svr = OpenSSL::SSL::SSLServer.new(tcp_svr, ctx1) Thread.new { svr.accept } ctx2 = OpenSSL::SSL::SSLContext.new ctx2.ecdh_curves = "P-256" cli = OpenSSL::SSL::SSLSocket.new(tcp_sock, ctx2) cli.connect p cli.tmp_key.group.curve_name # => "prime256v1" (is an alias for NIST P-256)
static VALUE
ossl_sslctx_flush_sessions(int argc, VALUE *argv, VALUE self)
{
VALUE arg1;
SSL_CTX *ctx;
time_t tm = 0;
rb_scan_args(argc, argv, "01", &arg1);
GetSSLCTX(self, ctx);
if (NIL_P(arg1)) {
tm = time(0);
} else if (rb_obj_is_instance_of(arg1, rb_cTime)) {
tm = NUM2LONG(rb_funcall(arg1, rb_intern("to_i"), 0));
} else {
ossl_raise(rb_eArgError, "arg must be Time or nil");
}
SSL_CTX_flush_sessions(ctx, (long)tm);
return self;
}
Removes sessions in the internal cache that have expired at time.
static VALUE
ossl_sslctx_get_options(VALUE self)
{
SSL_CTX *ctx;
GetSSLCTX(self, ctx);
return LONG2NUM(SSL_CTX_get_options(ctx));
}
Gets various OpenSSL options.
static VALUE
ossl_sslctx_set_options(VALUE self, VALUE options)
{
SSL_CTX *ctx;
rb_check_frozen(self);
GetSSLCTX(self, ctx);
SSL_CTX_clear_options(ctx, SSL_CTX_get_options(ctx));
if (NIL_P(options)) {
SSL_CTX_set_options(ctx, SSL_OP_ALL);
} else {
SSL_CTX_set_options(ctx, NUM2LONG(options));
}
return self;
}
Sets various OpenSSL options.
static VALUE
ossl_sslctx_get_security_level(VALUE self)
{
SSL_CTX *ctx;
GetSSLCTX(self, ctx);
#if defined(HAVE_SSL_CTX_GET_SECURITY_LEVEL)
return INT2NUM(SSL_CTX_get_security_level(ctx));
#else
(void)ctx;
return INT2FIX(0);
#endif
}
Returns the security level for the context.
See also OpenSSL::SSL::SSLContext#security_level=.
static VALUE
ossl_sslctx_set_security_level(VALUE self, VALUE value)
{
SSL_CTX *ctx;
rb_check_frozen(self);
GetSSLCTX(self, ctx);
#if defined(HAVE_SSL_CTX_GET_SECURITY_LEVEL)
SSL_CTX_set_security_level(ctx, NUM2INT(value));
#else
(void)ctx;
if (NUM2INT(value) != 0)
ossl_raise(rb_eNotImpError, "setting security level to other than 0 is "
"not supported in this version of OpenSSL");
#endif
return value;
}
Sets the security level for the context. OpenSSL limits parameters according to the level. The “parameters” include: ciphersuites, curves, key sizes, certificate signature algorithms, protocol version and so on. For example, level 1 rejects parameters offering below 80 bits of security, such as ciphersuites using MD5 for the MAC or RSA keys shorter than 1024 bits.
Note that attempts to set such parameters with insufficient security are also blocked. You need to lower the level first.
This feature is not supported in OpenSSL < 1.1.0, and setting the level to other than 0 will raise NotImplementedError. Level 0 means everything is permitted, the same behavior as previous versions of OpenSSL.
See the manpage of SSL_CTX_set_security_level(3) for details.
static VALUE
ossl_sslctx_session_add(VALUE self, VALUE arg)
{
SSL_CTX *ctx;
SSL_SESSION *sess;
GetSSLCTX(self, ctx);
SafeGetSSLSession(arg, sess);
return SSL_CTX_add_session(ctx, sess) == 1 ? Qtrue : Qfalse;
}
Adds session to the session cache.
static VALUE
ossl_sslctx_get_session_cache_mode(VALUE self)
{
SSL_CTX *ctx;
GetSSLCTX(self, ctx);
return LONG2NUM(SSL_CTX_get_session_cache_mode(ctx));
}
The current session cache mode.
static VALUE
ossl_sslctx_set_session_cache_mode(VALUE self, VALUE arg)
{
SSL_CTX *ctx;
GetSSLCTX(self, ctx);
SSL_CTX_set_session_cache_mode(ctx, NUM2LONG(arg));
return arg;
}
Sets the SSL session cache mode. Bitwise-or together the desired SESSION_CACHE_* constants to set. See SSL_CTX_set_session_cache_mode(3) for details.
static VALUE
ossl_sslctx_get_session_cache_size(VALUE self)
{
SSL_CTX *ctx;
GetSSLCTX(self, ctx);
return LONG2NUM(SSL_CTX_sess_get_cache_size(ctx));
}
Returns the current session cache size. Zero is used to represent an unlimited cache size.
static VALUE
ossl_sslctx_set_session_cache_size(VALUE self, VALUE arg)
{
SSL_CTX *ctx;
GetSSLCTX(self, ctx);
SSL_CTX_sess_set_cache_size(ctx, NUM2LONG(arg));
return arg;
}
Sets the session cache size. Returns the previously valid session cache size. Zero is used to represent an unlimited session cache size.
static VALUE
ossl_sslctx_get_session_cache_stats(VALUE self)
{
SSL_CTX *ctx;
VALUE hash;
GetSSLCTX(self, ctx);
hash = rb_hash_new();
rb_hash_aset(hash, ID2SYM(rb_intern("cache_num")), LONG2NUM(SSL_CTX_sess_number(ctx)));
rb_hash_aset(hash, ID2SYM(rb_intern("connect")), LONG2NUM(SSL_CTX_sess_connect(ctx)));
rb_hash_aset(hash, ID2SYM(rb_intern("connect_good")), LONG2NUM(SSL_CTX_sess_connect_good(ctx)));
rb_hash_aset(hash, ID2SYM(rb_intern("connect_renegotiate")), LONG2NUM(SSL_CTX_sess_connect_renegotiate(ctx)));
rb_hash_aset(hash, ID2SYM(rb_intern("accept")), LONG2NUM(SSL_CTX_sess_accept(ctx)));
rb_hash_aset(hash, ID2SYM(rb_intern("accept_good")), LONG2NUM(SSL_CTX_sess_accept_good(ctx)));
rb_hash_aset(hash, ID2SYM(rb_intern("accept_renegotiate")), LONG2NUM(SSL_CTX_sess_accept_renegotiate(ctx)));
rb_hash_aset(hash, ID2SYM(rb_intern("cache_hits")), LONG2NUM(SSL_CTX_sess_hits(ctx)));
rb_hash_aset(hash, ID2SYM(rb_intern("cb_hits")), LONG2NUM(SSL_CTX_sess_cb_hits(ctx)));
rb_hash_aset(hash, ID2SYM(rb_intern("cache_misses")), LONG2NUM(SSL_CTX_sess_misses(ctx)));
rb_hash_aset(hash, ID2SYM(rb_intern("cache_full")), LONG2NUM(SSL_CTX_sess_cache_full(ctx)));
rb_hash_aset(hash, ID2SYM(rb_intern("timeouts")), LONG2NUM(SSL_CTX_sess_timeouts(ctx)));
return hash;
}
Returns a Hash containing the following keys:
- :accept
-
Number of started SSL/TLS handshakes in server mode
- :accept_good
-
Number of established SSL/TLS sessions in server mode
- :accept_renegotiate
-
Number of start renegotiations in server mode
- :cache_full
-
Number of sessions that were removed due to cache overflow
- :cache_hits
-
Number of successfully reused connections
- :cache_misses
-
Number of sessions proposed by clients that were not found in the cache
- :cache_num
-
Number of sessions in the internal session cache
- :cb_hits
-
Number of sessions retrieved from the external cache in server mode
- :connect
-
Number of started SSL/TLS handshakes in client mode
- :connect_good
-
Number of established SSL/TLS sessions in client mode
- :connect_renegotiate
-
Number of start renegotiations in client mode
- :timeouts
-
Number of sessions proposed by clients that were found in the cache but had expired due to timeouts
static VALUE
ossl_sslctx_session_remove(VALUE self, VALUE arg)
{
SSL_CTX *ctx;
SSL_SESSION *sess;
GetSSLCTX(self, ctx);
SafeGetSSLSession(arg, sess);
return SSL_CTX_remove_session(ctx, sess) == 1 ? Qtrue : Qfalse;
}
Removes session from the session cache.
# File tmp/rubies/ruby-2.4.10/ext/openssl/lib/openssl/ssl.rb, line 115
def set_params(params={})
params = DEFAULT_PARAMS.merge(params)
params.each{|name, value| self.__send__("#{name}=", value) }
if self.verify_mode != OpenSSL::SSL::VERIFY_NONE
unless self.ca_file or self.ca_path or self.cert_store
self.cert_store = DEFAULT_CERT_STORE
end
end
return params
end
Sets saner defaults optimized for the use with HTTP-like protocols.
If a Hash params is given, the parameters are overridden with it. The keys in params must be assignment methods on SSLContext.
If the verify_mode is not VERIFY_NONE and ca_file, ca_path and cert_store are not set then the system default certificate store is used.
static VALUE
ossl_sslctx_setup(VALUE self)
{
SSL_CTX *ctx;
X509 *cert = NULL, *client_ca = NULL;
EVP_PKEY *key = NULL;
char *ca_path = NULL, *ca_file = NULL;
int verify_mode;
long i;
VALUE val;
if(OBJ_FROZEN(self)) return Qnil;
GetSSLCTX(self, ctx);
#if !defined(OPENSSL_NO_DH)
SSL_CTX_set_tmp_dh_callback(ctx, ossl_tmp_dh_callback);
#endif
#if !defined(OPENSSL_NO_EC)
/* We added SSLContext#tmp_ecdh_callback= in Ruby 2.3.0,
* but SSL_CTX_set_tmp_ecdh_callback() was removed in OpenSSL 1.1.0. */
if (RTEST(rb_attr_get(self, id_i_tmp_ecdh_callback))) {
# if defined(HAVE_SSL_CTX_SET_TMP_ECDH_CALLBACK)
rb_warn("#tmp_ecdh_callback= is deprecated; use #ecdh_curves= instead");
SSL_CTX_set_tmp_ecdh_callback(ctx, ossl_tmp_ecdh_callback);
# if defined(HAVE_SSL_CTX_SET_ECDH_AUTO)
/* tmp_ecdh_callback and ecdh_auto conflict; OpenSSL ignores
* tmp_ecdh_callback. So disable ecdh_auto. */
if (!SSL_CTX_set_ecdh_auto(ctx, 0))
ossl_raise(eSSLError, "SSL_CTX_set_ecdh_auto");
# endif
# else
ossl_raise(eSSLError, "OpenSSL does not support tmp_ecdh_callback; "
"use #ecdh_curves= instead");
# endif
}
#endif /* OPENSSL_NO_EC */
val = rb_attr_get(self, id_i_cert_store);
if (!NIL_P(val)) {
X509_STORE *store = GetX509StorePtr(val); /* NO NEED TO DUP */
SSL_CTX_set_cert_store(ctx, store);
#if !defined(HAVE_X509_STORE_UP_REF)
/*
* WORKAROUND:
* X509_STORE can count references, but
* X509_STORE_free() doesn't care it.
* So we won't increment it but mark it by ex_data.
*/
SSL_CTX_set_ex_data(ctx, ossl_ssl_ex_store_p, (void *)1);
#else /* Fixed in OpenSSL 1.0.2; bff9ce4db38b (master), 5b4b9ce976fc (1.0.2) */
X509_STORE_up_ref(store);
#endif
}
val = rb_attr_get(self, id_i_extra_chain_cert);
if(!NIL_P(val)){
rb_block_call(val, rb_intern("each"), 0, 0, ossl_sslctx_add_extra_chain_cert_i, self);
}
/* private key may be bundled in certificate file. */
val = rb_attr_get(self, id_i_cert);
cert = NIL_P(val) ? NULL : GetX509CertPtr(val); /* NO DUP NEEDED */
val = rb_attr_get(self, id_i_key);
key = NIL_P(val) ? NULL : GetPrivPKeyPtr(val); /* NO DUP NEEDED */
if (cert && key) {
if (!SSL_CTX_use_certificate(ctx, cert)) {
/* Adds a ref => Safe to FREE */
ossl_raise(eSSLError, "SSL_CTX_use_certificate");
}
if (!SSL_CTX_use_PrivateKey(ctx, key)) {
/* Adds a ref => Safe to FREE */
ossl_raise(eSSLError, "SSL_CTX_use_PrivateKey");
}
if (!SSL_CTX_check_private_key(ctx)) {
ossl_raise(eSSLError, "SSL_CTX_check_private_key");
}
}
val = rb_attr_get(self, id_i_client_ca);
if(!NIL_P(val)){
if (RB_TYPE_P(val, T_ARRAY)) {
for(i = 0; i < RARRAY_LEN(val); i++){
client_ca = GetX509CertPtr(RARRAY_AREF(val, i));
if (!SSL_CTX_add_client_CA(ctx, client_ca)){
/* Copies X509_NAME => FREE it. */
ossl_raise(eSSLError, "SSL_CTX_add_client_CA");
}
}
}
else{
client_ca = GetX509CertPtr(val); /* NO DUP NEEDED. */
if (!SSL_CTX_add_client_CA(ctx, client_ca)){
/* Copies X509_NAME => FREE it. */
ossl_raise(eSSLError, "SSL_CTX_add_client_CA");
}
}
}
val = rb_attr_get(self, id_i_ca_file);
ca_file = NIL_P(val) ? NULL : StringValueCStr(val);
val = rb_attr_get(self, id_i_ca_path);
ca_path = NIL_P(val) ? NULL : StringValueCStr(val);
if(ca_file || ca_path){
if (!SSL_CTX_load_verify_locations(ctx, ca_file, ca_path))
rb_warning("can't set verify locations");
}
val = rb_attr_get(self, id_i_verify_mode);
verify_mode = NIL_P(val) ? SSL_VERIFY_NONE : NUM2INT(val);
SSL_CTX_set_verify(ctx, verify_mode, ossl_ssl_verify_callback);
if (RTEST(rb_attr_get(self, id_i_client_cert_cb)))
SSL_CTX_set_client_cert_cb(ctx, ossl_client_cert_cb);
val = rb_attr_get(self, id_i_timeout);
if(!NIL_P(val)) SSL_CTX_set_timeout(ctx, NUM2LONG(val));
val = rb_attr_get(self, id_i_verify_depth);
if(!NIL_P(val)) SSL_CTX_set_verify_depth(ctx, NUM2INT(val));
#ifdef HAVE_SSL_CTX_SET_NEXT_PROTO_SELECT_CB
val = rb_attr_get(self, id_i_npn_protocols);
if (!NIL_P(val)) {
VALUE encoded = ssl_encode_npn_protocols(val);
rb_ivar_set(self, id_npn_protocols_encoded, encoded);
SSL_CTX_set_next_protos_advertised_cb(ctx, ssl_npn_advertise_cb, (void *)encoded);
OSSL_Debug("SSL NPN advertise callback added");
}
if (RTEST(rb_attr_get(self, id_i_npn_select_cb))) {
SSL_CTX_set_next_proto_select_cb(ctx, ssl_npn_select_cb, (void *) self);
OSSL_Debug("SSL NPN select callback added");
}
#endif
#ifdef HAVE_SSL_CTX_SET_ALPN_SELECT_CB
val = rb_attr_get(self, id_i_alpn_protocols);
if (!NIL_P(val)) {
VALUE rprotos = ssl_encode_npn_protocols(val);
/* returns 0 on success */
if (SSL_CTX_set_alpn_protos(ctx, (unsigned char *)RSTRING_PTR(rprotos),
RSTRING_LENINT(rprotos)))
ossl_raise(eSSLError, "SSL_CTX_set_alpn_protos");
OSSL_Debug("SSL ALPN values added");
}
if (RTEST(rb_attr_get(self, id_i_alpn_select_cb))) {
SSL_CTX_set_alpn_select_cb(ctx, ssl_alpn_select_cb, (void *) self);
OSSL_Debug("SSL ALPN select callback added");
}
#endif
rb_obj_freeze(self);
val = rb_attr_get(self, id_i_session_id_context);
if (!NIL_P(val)){
StringValue(val);
if (!SSL_CTX_set_session_id_context(ctx, (unsigned char *)RSTRING_PTR(val),
RSTRING_LENINT(val))){
ossl_raise(eSSLError, "SSL_CTX_set_session_id_context");
}
}
if (RTEST(rb_attr_get(self, id_i_session_get_cb))) {
SSL_CTX_sess_set_get_cb(ctx, ossl_sslctx_session_get_cb);
OSSL_Debug("SSL SESSION get callback added");
}
if (RTEST(rb_attr_get(self, id_i_session_new_cb))) {
SSL_CTX_sess_set_new_cb(ctx, ossl_sslctx_session_new_cb);
OSSL_Debug("SSL SESSION new callback added");
}
if (RTEST(rb_attr_get(self, id_i_session_remove_cb))) {
SSL_CTX_sess_set_remove_cb(ctx, ossl_sslctx_session_remove_cb);
OSSL_Debug("SSL SESSION remove callback added");
}
#ifdef HAVE_SSL_SET_TLSEXT_HOST_NAME
val = rb_attr_get(self, id_i_servername_cb);
if (!NIL_P(val)) {
SSL_CTX_set_tlsext_servername_callback(ctx, ssl_servername_cb);
OSSL_Debug("SSL TLSEXT servername callback added");
}
#endif
return Qtrue;
}
static VALUE
ossl_sslctx_set_ssl_version(VALUE self, VALUE ssl_method)
{
SSL_CTX *ctx;
const char *s;
VALUE m = ssl_method;
int i;
GetSSLCTX(self, ctx);
if (RB_TYPE_P(ssl_method, T_SYMBOL))
m = rb_sym2str(ssl_method);
s = StringValueCStr(m);
for (i = 0; i < numberof(ossl_ssl_method_tab); i++) {
if (strcmp(ossl_ssl_method_tab[i].name, s) == 0) {
#if defined(HAVE_SSL_CTX_SET_MIN_PROTO_VERSION)
int version = ossl_ssl_method_tab[i].version;
#endif
SSL_METHOD *method = ossl_ssl_method_tab[i].func();
if (SSL_CTX_set_ssl_version(ctx, method) != 1)
ossl_raise(eSSLError, "SSL_CTX_set_ssl_version");
#if defined(HAVE_SSL_CTX_SET_MIN_PROTO_VERSION)
if (!SSL_CTX_set_min_proto_version(ctx, version))
ossl_raise(eSSLError, "SSL_CTX_set_min_proto_version");
if (!SSL_CTX_set_max_proto_version(ctx, version))
ossl_raise(eSSLError, "SSL_CTX_set_max_proto_version");
#endif
return ssl_method;
}
}
ossl_raise(rb_eArgError, "unknown SSL method `%"PRIsVALUE"'.", m);
}
Sets the SSL/TLS protocol version for the context. This forces connections to use only the specified protocol version.
You can get a list of valid versions with OpenSSL::SSL::SSLContext::METHODS