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mini_ssl.c
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mini_ssl.c
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#define RSTRING_NOT_MODIFIED 1
#include <ruby.h>
#include <ruby/version.h>
#include <ruby/io.h>
#ifdef HAVE_OPENSSL_BIO_H
#include <openssl/bio.h>
#include <openssl/ssl.h>
#include <openssl/dh.h>
#include <openssl/err.h>
#include <openssl/x509.h>
#ifndef SSL_OP_NO_COMPRESSION
#define SSL_OP_NO_COMPRESSION 0
#endif
typedef struct {
BIO* read;
BIO* write;
SSL* ssl;
SSL_CTX* ctx;
} ms_conn;
typedef struct {
unsigned char* buf;
int bytes;
} ms_cert_buf;
VALUE eError;
void engine_free(void *ptr) {
ms_conn *conn = ptr;
ms_cert_buf* cert_buf = (ms_cert_buf*)SSL_get_app_data(conn->ssl);
if(cert_buf) {
OPENSSL_free(cert_buf->buf);
free(cert_buf);
}
SSL_free(conn->ssl);
SSL_CTX_free(conn->ctx);
free(conn);
}
const rb_data_type_t engine_data_type = {
"MiniSSL/ENGINE",
{ 0, engine_free, 0 },
0, 0, RUBY_TYPED_FREE_IMMEDIATELY,
};
DH *get_dh2048() {
/* `openssl dhparam -C 2048`
* -----BEGIN DH PARAMETERS-----
* MIIBCAKCAQEAjmh1uQHdTfxOyxEbKAV30fUfzqMDF/ChPzjfyzl2jcrqQMhrk76o
* 2NPNXqxHwsddMZ1RzvU8/jl+uhRuPWjXCFZbhET4N1vrviZM3VJhV8PPHuiVOACO
* y32jFd+Szx4bo2cXSK83hJ6jRd+0asP1awWjz9/06dFkrILCXMIfQLo0D8rqmppn
* EfDDAwuudCpM9kcDmBRAm9JsKbQ6gzZWjkc5+QWSaQofojIHbjvj3xzguaCJn+oQ
* vHWM+hsAnaOgEwCyeZ3xqs+/5lwSbkE/tqJW98cEZGygBUVo9jxZRZx6KOfjpdrb
* yenO9LJr/qtyrZB31WJbqxI0m0AKTAO8UwIBAg==
* -----END DH PARAMETERS-----
*/
static unsigned char dh2048_p[] = {
0x8E, 0x68, 0x75, 0xB9, 0x01, 0xDD, 0x4D, 0xFC, 0x4E, 0xCB,
0x11, 0x1B, 0x28, 0x05, 0x77, 0xD1, 0xF5, 0x1F, 0xCE, 0xA3,
0x03, 0x17, 0xF0, 0xA1, 0x3F, 0x38, 0xDF, 0xCB, 0x39, 0x76,
0x8D, 0xCA, 0xEA, 0x40, 0xC8, 0x6B, 0x93, 0xBE, 0xA8, 0xD8,
0xD3, 0xCD, 0x5E, 0xAC, 0x47, 0xC2, 0xC7, 0x5D, 0x31, 0x9D,
0x51, 0xCE, 0xF5, 0x3C, 0xFE, 0x39, 0x7E, 0xBA, 0x14, 0x6E,
0x3D, 0x68, 0xD7, 0x08, 0x56, 0x5B, 0x84, 0x44, 0xF8, 0x37,
0x5B, 0xEB, 0xBE, 0x26, 0x4C, 0xDD, 0x52, 0x61, 0x57, 0xC3,
0xCF, 0x1E, 0xE8, 0x95, 0x38, 0x00, 0x8E, 0xCB, 0x7D, 0xA3,
0x15, 0xDF, 0x92, 0xCF, 0x1E, 0x1B, 0xA3, 0x67, 0x17, 0x48,
0xAF, 0x37, 0x84, 0x9E, 0xA3, 0x45, 0xDF, 0xB4, 0x6A, 0xC3,
0xF5, 0x6B, 0x05, 0xA3, 0xCF, 0xDF, 0xF4, 0xE9, 0xD1, 0x64,
0xAC, 0x82, 0xC2, 0x5C, 0xC2, 0x1F, 0x40, 0xBA, 0x34, 0x0F,
0xCA, 0xEA, 0x9A, 0x9A, 0x67, 0x11, 0xF0, 0xC3, 0x03, 0x0B,
0xAE, 0x74, 0x2A, 0x4C, 0xF6, 0x47, 0x03, 0x98, 0x14, 0x40,
0x9B, 0xD2, 0x6C, 0x29, 0xB4, 0x3A, 0x83, 0x36, 0x56, 0x8E,
0x47, 0x39, 0xF9, 0x05, 0x92, 0x69, 0x0A, 0x1F, 0xA2, 0x32,
0x07, 0x6E, 0x3B, 0xE3, 0xDF, 0x1C, 0xE0, 0xB9, 0xA0, 0x89,
0x9F, 0xEA, 0x10, 0xBC, 0x75, 0x8C, 0xFA, 0x1B, 0x00, 0x9D,
0xA3, 0xA0, 0x13, 0x00, 0xB2, 0x79, 0x9D, 0xF1, 0xAA, 0xCF,
0xBF, 0xE6, 0x5C, 0x12, 0x6E, 0x41, 0x3F, 0xB6, 0xA2, 0x56,
0xF7, 0xC7, 0x04, 0x64, 0x6C, 0xA0, 0x05, 0x45, 0x68, 0xF6,
0x3C, 0x59, 0x45, 0x9C, 0x7A, 0x28, 0xE7, 0xE3, 0xA5, 0xDA,
0xDB, 0xC9, 0xE9, 0xCE, 0xF4, 0xB2, 0x6B, 0xFE, 0xAB, 0x72,
0xAD, 0x90, 0x77, 0xD5, 0x62, 0x5B, 0xAB, 0x12, 0x34, 0x9B,
0x40, 0x0A, 0x4C, 0x03, 0xBC, 0x53
};
static unsigned char dh2048_g[] = { 0x02 };
DH *dh;
#if !(OPENSSL_VERSION_NUMBER < 0x10100005L || defined(LIBRESSL_VERSION_NUMBER))
BIGNUM *p, *g;
#endif
dh = DH_new();
#if OPENSSL_VERSION_NUMBER < 0x10100005L || defined(LIBRESSL_VERSION_NUMBER)
dh->p = BN_bin2bn(dh2048_p, sizeof(dh2048_p), NULL);
dh->g = BN_bin2bn(dh2048_g, sizeof(dh2048_g), NULL);
if ((dh->p == NULL) || (dh->g == NULL)) {
DH_free(dh);
return NULL;
}
#else
p = BN_bin2bn(dh2048_p, sizeof(dh2048_p), NULL);
g = BN_bin2bn(dh2048_g, sizeof(dh2048_g), NULL);
if (p == NULL || g == NULL || !DH_set0_pqg(dh, p, NULL, g)) {
DH_free(dh);
BN_free(p);
BN_free(g);
return NULL;
}
#endif
return dh;
}
static void
sslctx_free(void *ptr) {
SSL_CTX *ctx = ptr;
SSL_CTX_free(ctx);
}
static const rb_data_type_t sslctx_type = {
"MiniSSL/SSLContext",
{
0, sslctx_free,
},
0, 0, RUBY_TYPED_FREE_IMMEDIATELY,
};
ms_conn* engine_alloc(VALUE klass, VALUE* obj) {
ms_conn* conn;
*obj = TypedData_Make_Struct(klass, ms_conn, &engine_data_type, conn);
conn->read = BIO_new(BIO_s_mem());
BIO_set_nbio(conn->read, 1);
conn->write = BIO_new(BIO_s_mem());
BIO_set_nbio(conn->write, 1);
conn->ssl = 0;
conn->ctx = 0;
return conn;
}
static int engine_verify_callback(int preverify_ok, X509_STORE_CTX* ctx) {
X509* err_cert;
SSL* ssl;
int bytes;
unsigned char* buf = NULL;
if(!preverify_ok) {
err_cert = X509_STORE_CTX_get_current_cert(ctx);
if(err_cert) {
/*
* Save the failed certificate for inspection/logging.
*/
bytes = i2d_X509(err_cert, &buf);
if(bytes > 0) {
ms_cert_buf* cert_buf = (ms_cert_buf*)malloc(sizeof(ms_cert_buf));
cert_buf->buf = buf;
cert_buf->bytes = bytes;
ssl = X509_STORE_CTX_get_ex_data(ctx, SSL_get_ex_data_X509_STORE_CTX_idx());
SSL_set_app_data(ssl, cert_buf);
}
}
}
return preverify_ok;
}
static VALUE
sslctx_alloc(VALUE klass) {
SSL_CTX *ctx;
long mode = 0 |
SSL_MODE_ENABLE_PARTIAL_WRITE |
SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER |
SSL_MODE_RELEASE_BUFFERS;
#ifdef HAVE_TLS_SERVER_METHOD
ctx = SSL_CTX_new(TLS_method());
// printf("\nctx using TLS_method security_level %d\n", SSL_CTX_get_security_level(ctx));
#else
ctx = SSL_CTX_new(SSLv23_method());
#endif
if (!ctx) {
rb_raise(eError, "SSL_CTX_new");
}
SSL_CTX_set_mode(ctx, mode);
return TypedData_Wrap_Struct(klass, &sslctx_type, ctx);
}
VALUE
sslctx_initialize(VALUE self, VALUE mini_ssl_ctx) {
SSL_CTX* ctx;
#ifdef HAVE_SSL_CTX_SET_MIN_PROTO_VERSION
int min;
#endif
int ssl_options;
VALUE key, cert, ca, verify_mode, ssl_cipher_filter, no_tlsv1, no_tlsv1_1,
verification_flags, session_id_bytes;
DH *dh;
#if OPENSSL_VERSION_NUMBER < 0x10002000L
EC_KEY *ecdh;
#endif
TypedData_Get_Struct(self, SSL_CTX, &sslctx_type, ctx);
key = rb_funcall(mini_ssl_ctx, rb_intern_const("key"), 0);
StringValue(key);
cert = rb_funcall(mini_ssl_ctx, rb_intern_const("cert"), 0);
StringValue(cert);
ca = rb_funcall(mini_ssl_ctx, rb_intern_const("ca"), 0);
verify_mode = rb_funcall(mini_ssl_ctx, rb_intern_const("verify_mode"), 0);
ssl_cipher_filter = rb_funcall(mini_ssl_ctx, rb_intern_const("ssl_cipher_filter"), 0);
no_tlsv1 = rb_funcall(mini_ssl_ctx, rb_intern_const("no_tlsv1"), 0);
no_tlsv1_1 = rb_funcall(mini_ssl_ctx, rb_intern_const("no_tlsv1_1"), 0);
SSL_CTX_use_certificate_chain_file(ctx, RSTRING_PTR(cert));
SSL_CTX_use_PrivateKey_file(ctx, RSTRING_PTR(key), SSL_FILETYPE_PEM);
verification_flags = rb_funcall(mini_ssl_ctx, rb_intern_const("verification_flags"), 0);
if (!NIL_P(verification_flags)) {
X509_VERIFY_PARAM *param = SSL_CTX_get0_param(ctx);
X509_VERIFY_PARAM_set_flags(param, NUM2INT(verification_flags));
SSL_CTX_set1_param(ctx, param);
}
if (!NIL_P(ca)) {
StringValue(ca);
SSL_CTX_load_verify_locations(ctx, RSTRING_PTR(ca), NULL);
}
ssl_options = SSL_OP_CIPHER_SERVER_PREFERENCE | SSL_OP_SINGLE_ECDH_USE | SSL_OP_NO_COMPRESSION;
#ifdef HAVE_SSL_CTX_SET_MIN_PROTO_VERSION
if (RTEST(no_tlsv1_1)) {
min = TLS1_2_VERSION;
}
else if (RTEST(no_tlsv1)) {
min = TLS1_1_VERSION;
}
else {
min = TLS1_VERSION;
}
SSL_CTX_set_min_proto_version(ctx, min);
SSL_CTX_set_options(ctx, ssl_options);
#else
/* As of 1.0.2f, SSL_OP_SINGLE_DH_USE key use is always on */
ssl_options |= SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_SINGLE_DH_USE;
if (RTEST(no_tlsv1)) {
ssl_options |= SSL_OP_NO_TLSv1;
}
if(RTEST(no_tlsv1_1)) {
ssl_options |= SSL_OP_NO_TLSv1 | SSL_OP_NO_TLSv1_1;
}
SSL_CTX_set_options(ctx, ssl_options);
#endif
SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_OFF);
if (!NIL_P(ssl_cipher_filter)) {
StringValue(ssl_cipher_filter);
SSL_CTX_set_cipher_list(ctx, RSTRING_PTR(ssl_cipher_filter));
}
else {
SSL_CTX_set_cipher_list(ctx, "HIGH:!aNULL@STRENGTH");
}
dh = get_dh2048();
SSL_CTX_set_tmp_dh(ctx, dh);
#if OPENSSL_VERSION_NUMBER < 0x10002000L
// Remove this case if OpenSSL 1.0.1 (now EOL) support is no
// longer needed.
ecdh = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
if (ecdh) {
SSL_CTX_set_tmp_ecdh(ctx, ecdh);
EC_KEY_free(ecdh);
}
#elif OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
SSL_CTX_set_ecdh_auto(ctx, 1);
#endif
if (NIL_P(verify_mode)) {
/* SSL_CTX_set_verify(ctx, SSL_VERIFY_NONE, NULL); */
} else {
SSL_CTX_set_verify(ctx, NUM2INT(verify_mode), engine_verify_callback);
}
// Random.bytes available in Ruby 2.5 and later, Random::DEFAULT deprecated in 3.0
session_id_bytes = rb_funcall(
#ifdef HAVE_RANDOM_BYTES
rb_cRandom,
#else
rb_const_get(rb_cRandom, rb_intern_const("DEFAULT")),
#endif
rb_intern_const("bytes"),
1, ULL2NUM(SSL_MAX_SSL_SESSION_ID_LENGTH));
SSL_CTX_set_session_id_context(ctx,
(unsigned char *) RSTRING_PTR(session_id_bytes),
SSL_MAX_SSL_SESSION_ID_LENGTH);
// printf("\ninitialize end security_level %d\n", SSL_CTX_get_security_level(ctx));
rb_obj_freeze(self);
return self;
}
VALUE engine_init_server(VALUE self, VALUE sslctx) {
ms_conn* conn;
VALUE obj;
SSL_CTX* ctx;
SSL* ssl;
conn = engine_alloc(self, &obj);
TypedData_Get_Struct(sslctx, SSL_CTX, &sslctx_type, ctx);
ssl = SSL_new(ctx);
conn->ssl = ssl;
SSL_set_app_data(ssl, NULL);
SSL_set_bio(ssl, conn->read, conn->write);
SSL_set_accept_state(ssl);
return obj;
}
VALUE engine_init_client(VALUE klass) {
VALUE obj;
ms_conn* conn = engine_alloc(klass, &obj);
#ifdef HAVE_DTLS_METHOD
conn->ctx = SSL_CTX_new(DTLS_method());
#else
conn->ctx = SSL_CTX_new(DTLSv1_method());
#endif
conn->ssl = SSL_new(conn->ctx);
SSL_set_app_data(conn->ssl, NULL);
SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
SSL_set_bio(conn->ssl, conn->read, conn->write);
SSL_set_connect_state(conn->ssl);
return obj;
}
VALUE engine_inject(VALUE self, VALUE str) {
ms_conn* conn;
long used;
TypedData_Get_Struct(self, ms_conn, &engine_data_type, conn);
StringValue(str);
used = BIO_write(conn->read, RSTRING_PTR(str), (int)RSTRING_LEN(str));
if(used == 0 || used == -1) {
return Qfalse;
}
return INT2FIX(used);
}
NORETURN(void raise_error(SSL* ssl, int result));
void raise_error(SSL* ssl, int result) {
char buf[512];
char msg[512];
const char* err_str;
int err = errno;
int mask = 4095;
int ssl_err = SSL_get_error(ssl, result);
int verify_err = (int) SSL_get_verify_result(ssl);
if(SSL_ERROR_SYSCALL == ssl_err) {
snprintf(msg, sizeof(msg), "System error: %s - %d", strerror(err), err);
} else if(SSL_ERROR_SSL == ssl_err) {
if(X509_V_OK != verify_err) {
err_str = X509_verify_cert_error_string(verify_err);
snprintf(msg, sizeof(msg),
"OpenSSL certificate verification error: %s - %d",
err_str, verify_err);
} else {
err = (int) ERR_get_error();
ERR_error_string_n(err, buf, sizeof(buf));
snprintf(msg, sizeof(msg), "OpenSSL error: %s - %d", buf, err & mask);
}
} else {
snprintf(msg, sizeof(msg), "Unknown OpenSSL error: %d", ssl_err);
}
ERR_clear_error();
rb_raise(eError, "%s", msg);
}
VALUE engine_read(VALUE self) {
ms_conn* conn;
char buf[512];
int bytes, error;
TypedData_Get_Struct(self, ms_conn, &engine_data_type, conn);
ERR_clear_error();
bytes = SSL_read(conn->ssl, (void*)buf, sizeof(buf));
if(bytes > 0) {
return rb_str_new(buf, bytes);
}
if(SSL_want_read(conn->ssl)) return Qnil;
error = SSL_get_error(conn->ssl, bytes);
if(error == SSL_ERROR_ZERO_RETURN) {
rb_eof_error();
} else {
raise_error(conn->ssl, bytes);
}
return Qnil;
}
VALUE engine_write(VALUE self, VALUE str) {
ms_conn* conn;
int bytes;
TypedData_Get_Struct(self, ms_conn, &engine_data_type, conn);
StringValue(str);
ERR_clear_error();
bytes = SSL_write(conn->ssl, (void*)RSTRING_PTR(str), (int)RSTRING_LEN(str));
if(bytes > 0) {
return INT2FIX(bytes);
}
if(SSL_want_write(conn->ssl)) return Qnil;
raise_error(conn->ssl, bytes);
return Qnil;
}
VALUE engine_extract(VALUE self) {
ms_conn* conn;
int bytes;
size_t pending;
// https://www.openssl.org/docs/manmaster/man3/BIO_f_buffer.html
// crypto/bio/bf_buff.c DEFAULT_BUFFER_SIZE
char buf[4096];
TypedData_Get_Struct(self, ms_conn, &engine_data_type, conn);
pending = BIO_pending(conn->write);
if(pending > 0) {
bytes = BIO_read(conn->write, buf, sizeof(buf));
if(bytes > 0) {
return rb_str_new(buf, bytes);
} else if(!BIO_should_retry(conn->write)) {
raise_error(conn->ssl, bytes);
}
}
return Qnil;
}
VALUE engine_shutdown(VALUE self) {
ms_conn* conn;
int ok;
TypedData_Get_Struct(self, ms_conn, &engine_data_type, conn);
ERR_clear_error();
ok = SSL_shutdown(conn->ssl);
if (ok == 0) {
return Qfalse;
}
return Qtrue;
}
VALUE engine_init(VALUE self) {
ms_conn* conn;
TypedData_Get_Struct(self, ms_conn, &engine_data_type, conn);
return SSL_in_init(conn->ssl) ? Qtrue : Qfalse;
}
VALUE engine_peercert(VALUE self) {
ms_conn* conn;
X509* cert;
int bytes;
unsigned char* buf = NULL;
ms_cert_buf* cert_buf = NULL;
VALUE rb_cert_buf;
TypedData_Get_Struct(self, ms_conn, &engine_data_type, conn);
cert = SSL_get_peer_certificate(conn->ssl);
if(!cert) {
/*
* See if there was a failed certificate associated with this client.
*/
cert_buf = (ms_cert_buf*)SSL_get_app_data(conn->ssl);
if(!cert_buf) {
return Qnil;
}
buf = cert_buf->buf;
bytes = cert_buf->bytes;
} else {
bytes = i2d_X509(cert, &buf);
X509_free(cert);
if(bytes < 0) {
return Qnil;
}
}
rb_cert_buf = rb_str_new((const char*)(buf), bytes);
if(!cert_buf) {
OPENSSL_free(buf);
}
return rb_cert_buf;
}
/* @see Puma::MiniSSL::Socket#ssl_version_state
* @version 5.0.0
*/
static VALUE
engine_ssl_vers_st(VALUE self) {
ms_conn* conn;
TypedData_Get_Struct(self, ms_conn, &engine_data_type, conn);
return rb_ary_new3(2, rb_str_new2(SSL_get_version(conn->ssl)), rb_str_new2(SSL_state_string(conn->ssl)));
}
VALUE noop(VALUE self) {
return Qnil;
}
void Init_mini_ssl(VALUE puma) {
VALUE mod, eng, sslctx;
/* Fake operation for documentation (RDoc, YARD) */
#if 0 == 1
puma = rb_define_module("Puma");
#endif
SSL_library_init();
OpenSSL_add_ssl_algorithms();
SSL_load_error_strings();
ERR_load_crypto_strings();
mod = rb_define_module_under(puma, "MiniSSL");
eng = rb_define_class_under(mod, "Engine", rb_cObject);
sslctx = rb_define_class_under(mod, "SSLContext", rb_cObject);
rb_define_alloc_func(sslctx, sslctx_alloc);
rb_define_method(sslctx, "initialize", sslctx_initialize, 1);
rb_undef_method(sslctx, "initialize_copy");
// OpenSSL Build / Runtime/Load versions
/* Version of OpenSSL that Puma was compiled with */
rb_define_const(mod, "OPENSSL_VERSION", rb_str_new2(OPENSSL_VERSION_TEXT));
#if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER >= 0x10100000
/* Version of OpenSSL that Puma loaded with */
rb_define_const(mod, "OPENSSL_LIBRARY_VERSION", rb_str_new2(OpenSSL_version(OPENSSL_VERSION)));
#else
rb_define_const(mod, "OPENSSL_LIBRARY_VERSION", rb_str_new2(SSLeay_version(SSLEAY_VERSION)));
#endif
#if defined(OPENSSL_NO_SSL3) || defined(OPENSSL_NO_SSL3_METHOD)
/* True if SSL3 is not available */
rb_define_const(mod, "OPENSSL_NO_SSL3", Qtrue);
#else
rb_define_const(mod, "OPENSSL_NO_SSL3", Qfalse);
#endif
#if defined(OPENSSL_NO_TLS1) || defined(OPENSSL_NO_TLS1_METHOD)
/* True if TLS1 is not available */
rb_define_const(mod, "OPENSSL_NO_TLS1", Qtrue);
#else
rb_define_const(mod, "OPENSSL_NO_TLS1", Qfalse);
#endif
#if defined(OPENSSL_NO_TLS1_1) || defined(OPENSSL_NO_TLS1_1_METHOD)
/* True if TLS1_1 is not available */
rb_define_const(mod, "OPENSSL_NO_TLS1_1", Qtrue);
#else
rb_define_const(mod, "OPENSSL_NO_TLS1_1", Qfalse);
#endif
rb_define_singleton_method(mod, "check", noop, 0);
eError = rb_define_class_under(mod, "SSLError", rb_eStandardError);
rb_define_singleton_method(eng, "server", engine_init_server, 1);
rb_define_singleton_method(eng, "client", engine_init_client, 0);
rb_define_method(eng, "inject", engine_inject, 1);
rb_define_method(eng, "read", engine_read, 0);
rb_define_method(eng, "write", engine_write, 1);
rb_define_method(eng, "extract", engine_extract, 0);
rb_define_method(eng, "shutdown", engine_shutdown, 0);
rb_define_method(eng, "init?", engine_init, 0);
rb_define_method(eng, "peercert", engine_peercert, 0);
rb_define_method(eng, "ssl_vers_st", engine_ssl_vers_st, 0);
}
#else
NORETURN(VALUE raise_error(VALUE self));
VALUE raise_error(VALUE self) {
rb_raise(rb_eStandardError, "SSL not available in this build");
}
void Init_mini_ssl(VALUE puma) {
VALUE mod;
mod = rb_define_module_under(puma, "MiniSSL");
rb_define_class_under(mod, "SSLError", rb_eStandardError);
rb_define_singleton_method(mod, "check", raise_error, 0);
}
#endif