bool
tr_dh_make_key (tr_dh_ctx_t raw_handle,
size_t private_key_length,
uint8_t * public_key,
size_t * public_key_length)
{
DH * handle = raw_handle;
int dh_size, my_public_key_length;
const BIGNUM * my_public_key;
assert (handle != NULL);
assert (public_key != NULL);
DH_set_length(handle, private_key_length * 8);
if (!check_result (DH_generate_key (handle)))
return false;
DH_get0_key (handle, &my_public_key, NULL);
my_public_key_length = BN_bn2bin (my_public_key, public_key);
dh_size = DH_size (handle);
tr_dh_align_key (public_key, my_public_key_length, dh_size);
if (public_key_length != NULL)
*public_key_length = dh_size;
return true;
}
int
dh_gen_key(DH *dh, int need)
{
int pbits;
const BIGNUM *p, *pub_key, *priv_key;
DH_get0_pqg(dh, &p, NULL, NULL);
if (need < 0 || p == NULL ||
(pbits = BN_num_bits(p)) <= 0 ||
need > INT_MAX / 2 || 2 * need > pbits)
return SSH_ERR_INVALID_ARGUMENT;
if (need < 256)
need = 256;
/*
* Pollard Rho, Big step/Little Step attacks are O(sqrt(n)),
* so double requested need here.
*/
DH_set_length(dh, MIN(need * 2, pbits - 1));
if (DH_generate_key(dh) == 0) {
return SSH_ERR_LIBCRYPTO_ERROR;
}
DH_get0_key(dh, &pub_key, &priv_key);
if (!dh_pub_is_valid(dh, pub_key)) {
#if 0
BN_clear(priv_key);
#endif
return SSH_ERR_LIBCRYPTO_ERROR;
}
return 0;
}
int network_init(server *srv) {
buffer *b;
size_t i, j;
network_backend_t backend;
#if OPENSSL_VERSION_NUMBER >= 0x0090800fL
#ifndef OPENSSL_NO_ECDH
EC_KEY *ecdh;
int nid;
#endif
#endif
#ifdef USE_OPENSSL
# ifndef OPENSSL_NO_DH
DH *dh;
# endif
BIO *bio;
/* 1024-bit MODP Group with 160-bit prime order subgroup (RFC5114)
* -----BEGIN DH PARAMETERS-----
* MIIBDAKBgQCxC4+WoIDgHd6S3l6uXVTsUsmfvPsGo8aaap3KUtI7YWBz4oZ1oj0Y
* mDjvHi7mUsAT7LSuqQYRIySXXDzUm4O/rMvdfZDEvXCYSI6cIZpzck7/1vrlZEc4
* +qMaT/VbzMChUa9fDci0vUW/N982XBpl5oz9p21NpwjfH7K8LkpDcQKBgQCk0cvV
* w/00EmdlpELvuZkF+BBN0lisUH/WQGz/FCZtMSZv6h5cQVZLd35pD1UE8hMWAhe0
* sBuIal6RVH+eJ0n01/vX07mpLuGQnQ0iY/gKdqaiTAh6CR9THb8KAWm2oorWYqTR
* jnOvoy13nVkY0IvIhY9Nzvl8KiSFXm7rIrOy5QICAKA=
* -----END DH PARAMETERS-----
*/
static const unsigned char dh1024_p[]={
0xB1,0x0B,0x8F,0x96,0xA0,0x80,0xE0,0x1D,0xDE,0x92,0xDE,0x5E,
0xAE,0x5D,0x54,0xEC,0x52,0xC9,0x9F,0xBC,0xFB,0x06,0xA3,0xC6,
0x9A,0x6A,0x9D,0xCA,0x52,0xD2,0x3B,0x61,0x60,0x73,0xE2,0x86,
0x75,0xA2,0x3D,0x18,0x98,0x38,0xEF,0x1E,0x2E,0xE6,0x52,0xC0,
0x13,0xEC,0xB4,0xAE,0xA9,0x06,0x11,0x23,0x24,0x97,0x5C,0x3C,
0xD4,0x9B,0x83,0xBF,0xAC,0xCB,0xDD,0x7D,0x90,0xC4,0xBD,0x70,
0x98,0x48,0x8E,0x9C,0x21,0x9A,0x73,0x72,0x4E,0xFF,0xD6,0xFA,
0xE5,0x64,0x47,0x38,0xFA,0xA3,0x1A,0x4F,0xF5,0x5B,0xCC,0xC0,
0xA1,0x51,0xAF,0x5F,0x0D,0xC8,0xB4,0xBD,0x45,0xBF,0x37,0xDF,
0x36,0x5C,0x1A,0x65,0xE6,0x8C,0xFD,0xA7,0x6D,0x4D,0xA7,0x08,
0xDF,0x1F,0xB2,0xBC,0x2E,0x4A,0x43,0x71,
};
static const unsigned char dh1024_g[]={
0xA4,0xD1,0xCB,0xD5,0xC3,0xFD,0x34,0x12,0x67,0x65,0xA4,0x42,
0xEF,0xB9,0x99,0x05,0xF8,0x10,0x4D,0xD2,0x58,0xAC,0x50,0x7F,
0xD6,0x40,0x6C,0xFF,0x14,0x26,0x6D,0x31,0x26,0x6F,0xEA,0x1E,
0x5C,0x41,0x56,0x4B,0x77,0x7E,0x69,0x0F,0x55,0x04,0xF2,0x13,
0x16,0x02,0x17,0xB4,0xB0,0x1B,0x88,0x6A,0x5E,0x91,0x54,0x7F,
0x9E,0x27,0x49,0xF4,0xD7,0xFB,0xD7,0xD3,0xB9,0xA9,0x2E,0xE1,
0x90,0x9D,0x0D,0x22,0x63,0xF8,0x0A,0x76,0xA6,0xA2,0x4C,0x08,
0x7A,0x09,0x1F,0x53,0x1D,0xBF,0x0A,0x01,0x69,0xB6,0xA2,0x8A,
0xD6,0x62,0xA4,0xD1,0x8E,0x73,0xAF,0xA3,0x2D,0x77,0x9D,0x59,
0x18,0xD0,0x8B,0xC8,0x85,0x8F,0x4D,0xCE,0xF9,0x7C,0x2A,0x24,
0x85,0x5E,0x6E,0xEB,0x22,0xB3,0xB2,0xE5,
};
#endif
struct nb_map {
network_backend_t nb;
const char *name;
} network_backends[] = {
/* lowest id wins */
#if defined USE_SENDFILE
{ NETWORK_BACKEND_SENDFILE, "sendfile" },
#endif
#if defined USE_LINUX_SENDFILE
{ NETWORK_BACKEND_SENDFILE, "linux-sendfile" },
#endif
#if defined USE_FREEBSD_SENDFILE
{ NETWORK_BACKEND_SENDFILE, "freebsd-sendfile" },
#endif
#if defined USE_SOLARIS_SENDFILEV
{ NETWORK_BACKEND_SENDFILE, "solaris-sendfilev" },
#endif
#if defined USE_WRITEV
{ NETWORK_BACKEND_WRITEV, "writev" },
#endif
{ NETWORK_BACKEND_WRITE, "write" },
{ NETWORK_BACKEND_UNSET, NULL }
};
#ifdef USE_OPENSSL
/* load SSL certificates */
for (i = 0; i < srv->config_context->used; i++) {
specific_config *s = srv->config_storage[i];
#ifndef SSL_OP_NO_COMPRESSION
# define SSL_OP_NO_COMPRESSION 0
#endif
long ssloptions =
SSL_OP_ALL | SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION | SSL_OP_NO_COMPRESSION;
if (buffer_string_is_empty(s->ssl_pemfile) && buffer_string_is_empty(s->ssl_ca_file)) continue;
if (srv->ssl_is_init == 0) {
SSL_load_error_strings();
SSL_library_init();
OpenSSL_add_all_algorithms();
srv->ssl_is_init = 1;
if (0 == RAND_status()) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
"not enough entropy in the pool");
return -1;
}
}
if (!buffer_string_is_empty(s->ssl_pemfile)) {
#ifdef OPENSSL_NO_TLSEXT
data_config *dc = (data_config *)srv->config_context->data[i];
if (COMP_HTTP_HOST == dc->comp) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
"can't use ssl.pemfile with $HTTP[\"host\"], openssl version does not support TLS extensions");
return -1;
}
#endif
if (network_openssl_load_pemfile(srv, i)) return -1;
}
if (!buffer_string_is_empty(s->ssl_ca_file)) {
s->ssl_ca_file_cert_names = SSL_load_client_CA_file(s->ssl_ca_file->ptr);
if (NULL == s->ssl_ca_file_cert_names) {
log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:",
ERR_error_string(ERR_get_error(), NULL), s->ssl_ca_file);
}
}
if (buffer_string_is_empty(s->ssl_pemfile) || !s->ssl_enabled) continue;
if (NULL == (s->ssl_ctx = SSL_CTX_new(SSLv23_server_method()))) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
ERR_error_string(ERR_get_error(), NULL));
return -1;
}
/* completely useless identifier; required for client cert verification to work with sessions */
if (0 == SSL_CTX_set_session_id_context(s->ssl_ctx, (const unsigned char*) CONST_STR_LEN("lighttpd"))) {
log_error_write(srv, __FILE__, __LINE__, "ss:s", "SSL:",
"failed to set session context",
ERR_error_string(ERR_get_error(), NULL));
return -1;
}
if (s->ssl_empty_fragments) {
#ifdef SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS
ssloptions &= ~SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS;
#else
ssloptions &= ~0x00000800L; /* hardcode constant */
log_error_write(srv, __FILE__, __LINE__, "ss", "WARNING: SSL:",
"'insert empty fragments' not supported by the openssl version used to compile lighttpd with");
#endif
}
SSL_CTX_set_options(s->ssl_ctx, ssloptions);
SSL_CTX_set_info_callback(s->ssl_ctx, ssl_info_callback);
if (!s->ssl_use_sslv2) {
/* disable SSLv2 */
if ((SSL_OP_NO_SSLv2 & SSL_CTX_set_options(s->ssl_ctx, SSL_OP_NO_SSLv2)) != SSL_OP_NO_SSLv2) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
ERR_error_string(ERR_get_error(), NULL));
return -1;
}
}
if (!s->ssl_use_sslv3) {
/* disable SSLv3 */
if ((SSL_OP_NO_SSLv3 & SSL_CTX_set_options(s->ssl_ctx, SSL_OP_NO_SSLv3)) != SSL_OP_NO_SSLv3) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
ERR_error_string(ERR_get_error(), NULL));
return -1;
}
}
if (!buffer_string_is_empty(s->ssl_cipher_list)) {
/* Disable support for low encryption ciphers */
if (SSL_CTX_set_cipher_list(s->ssl_ctx, s->ssl_cipher_list->ptr) != 1) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
ERR_error_string(ERR_get_error(), NULL));
return -1;
}
if (s->ssl_honor_cipher_order) {
SSL_CTX_set_options(s->ssl_ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
}
}
#ifndef OPENSSL_NO_DH
/* Support for Diffie-Hellman key exchange */
if (!buffer_string_is_empty(s->ssl_dh_file)) {
/* DH parameters from file */
bio = BIO_new_file((char *) s->ssl_dh_file->ptr, "r");
if (bio == NULL) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL: Unable to open file", s->ssl_dh_file->ptr);
return -1;
}
dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
BIO_free(bio);
if (dh == NULL) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL: PEM_read_bio_DHparams failed", s->ssl_dh_file->ptr);
return -1;
}
} else {
BIGNUM *dh_p, *dh_g;
/* Default DH parameters from RFC5114 */
dh = DH_new();
if (dh == NULL) {
log_error_write(srv, __FILE__, __LINE__, "s", "SSL: DH_new () failed");
return -1;
}
dh_p = BN_bin2bn(dh1024_p,sizeof(dh1024_p), NULL);
dh_g = BN_bin2bn(dh1024_g,sizeof(dh1024_g), NULL);
if ((dh_p == NULL) || (dh_g == NULL)) {
DH_free(dh);
log_error_write(srv, __FILE__, __LINE__, "s", "SSL: BN_bin2bn () failed");
return -1;
}
#if OPENSSL_VERSION_NUMBER < 0x10100000L \
|| defined(LIBRESSL_VERSION_NUMBER)
dh->p = dh_p;
dh->g = dh_g;
dh->length = 160;
#else
DH_set0_pqg(dh, dh_p, NULL, dh_g);
DH_set_length(dh, 160);
#endif
}
SSL_CTX_set_tmp_dh(s->ssl_ctx,dh);
SSL_CTX_set_options(s->ssl_ctx,SSL_OP_SINGLE_DH_USE);
DH_free(dh);
#else
if (!buffer_string_is_empty(s->ssl_dh_file)) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL: openssl compiled without DH support, can't load parameters from", s->ssl_dh_file->ptr);
}
#endif
#if OPENSSL_VERSION_NUMBER >= 0x0090800fL
#ifndef OPENSSL_NO_ECDH
/* Support for Elliptic-Curve Diffie-Hellman key exchange */
if (!buffer_string_is_empty(s->ssl_ec_curve)) {
/* OpenSSL only supports the "named curves" from RFC 4492, section 5.1.1. */
nid = OBJ_sn2nid((char *) s->ssl_ec_curve->ptr);
if (nid == 0) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL: Unknown curve name", s->ssl_ec_curve->ptr);
return -1;
}
} else {
/* Default curve */
nid = OBJ_sn2nid("prime256v1");
}
ecdh = EC_KEY_new_by_curve_name(nid);
if (ecdh == NULL) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL: Unable to create curve", s->ssl_ec_curve->ptr);
return -1;
}
SSL_CTX_set_tmp_ecdh(s->ssl_ctx,ecdh);
SSL_CTX_set_options(s->ssl_ctx,SSL_OP_SINGLE_ECDH_USE);
EC_KEY_free(ecdh);
#endif
#endif
/* load all ssl.ca-files specified in the config into each SSL_CTX to be prepared for SNI */
for (j = 0; j < srv->config_context->used; j++) {
specific_config *s1 = srv->config_storage[j];
if (!buffer_string_is_empty(s1->ssl_ca_file)) {
if (1 != SSL_CTX_load_verify_locations(s->ssl_ctx, s1->ssl_ca_file->ptr, NULL)) {
log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:",
ERR_error_string(ERR_get_error(), NULL), s1->ssl_ca_file);
return -1;
}
}
}
if (s->ssl_verifyclient) {
if (NULL == s->ssl_ca_file_cert_names) {
log_error_write(srv, __FILE__, __LINE__, "s",
"SSL: You specified ssl.verifyclient.activate but no ca_file"
);
return -1;
}
SSL_CTX_set_client_CA_list(s->ssl_ctx, SSL_dup_CA_list(s->ssl_ca_file_cert_names));
SSL_CTX_set_verify(
s->ssl_ctx,
SSL_VERIFY_PEER | (s->ssl_verifyclient_enforce ? SSL_VERIFY_FAIL_IF_NO_PEER_CERT : 0),
NULL
);
SSL_CTX_set_verify_depth(s->ssl_ctx, s->ssl_verifyclient_depth);
}
if (SSL_CTX_use_certificate(s->ssl_ctx, s->ssl_pemfile_x509) < 0) {
log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:",
ERR_error_string(ERR_get_error(), NULL), s->ssl_pemfile);
return -1;
}
if (SSL_CTX_use_PrivateKey(s->ssl_ctx, s->ssl_pemfile_pkey) < 0) {
log_error_write(srv, __FILE__, __LINE__, "ssb", "SSL:",
ERR_error_string(ERR_get_error(), NULL), s->ssl_pemfile);
return -1;
}
if (SSL_CTX_check_private_key(s->ssl_ctx) != 1) {
log_error_write(srv, __FILE__, __LINE__, "sssb", "SSL:",
"Private key does not match the certificate public key, reason:",
ERR_error_string(ERR_get_error(), NULL),
s->ssl_pemfile);
return -1;
}
SSL_CTX_set_default_read_ahead(s->ssl_ctx, 1);
SSL_CTX_set_mode(s->ssl_ctx, SSL_CTX_get_mode(s->ssl_ctx) | SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
# ifndef OPENSSL_NO_TLSEXT
if (!SSL_CTX_set_tlsext_servername_callback(s->ssl_ctx, network_ssl_servername_callback) ||
!SSL_CTX_set_tlsext_servername_arg(s->ssl_ctx, srv)) {
log_error_write(srv, __FILE__, __LINE__, "ss", "SSL:",
"failed to initialize TLS servername callback, openssl library does not support TLS servername extension");
return -1;
}
# endif
}
#endif
b = buffer_init();
buffer_copy_buffer(b, srv->srvconf.bindhost);
buffer_append_string_len(b, CONST_STR_LEN(":"));
buffer_append_int(b, srv->srvconf.port);
if (0 != network_server_init(srv, b, srv->config_storage[0])) {
buffer_free(b);
return -1;
}
buffer_free(b);
#ifdef USE_OPENSSL
srv->network_ssl_backend_write = network_write_chunkqueue_openssl;
#endif
/* get a usefull default */
backend = network_backends[0].nb;
/* match name against known types */
if (!buffer_string_is_empty(srv->srvconf.network_backend)) {
for (i = 0; network_backends[i].name; i++) {
/**/
if (buffer_is_equal_string(srv->srvconf.network_backend, network_backends[i].name, strlen(network_backends[i].name))) {
backend = network_backends[i].nb;
break;
}
}
if (NULL == network_backends[i].name) {
/* we don't know it */
log_error_write(srv, __FILE__, __LINE__, "sb",
"server.network-backend has a unknown value:",
srv->srvconf.network_backend);
return -1;
}
}
switch(backend) {
case NETWORK_BACKEND_WRITE:
srv->network_backend_write = network_write_chunkqueue_write;
break;
#if defined(USE_WRITEV)
case NETWORK_BACKEND_WRITEV:
srv->network_backend_write = network_write_chunkqueue_writev;
break;
#endif
#if defined(USE_SENDFILE)
case NETWORK_BACKEND_SENDFILE:
srv->network_backend_write = network_write_chunkqueue_sendfile;
break;
#endif
default:
return -1;
}
/* check for $SERVER["socket"] */
for (i = 1; i < srv->config_context->used; i++) {
data_config *dc = (data_config *)srv->config_context->data[i];
specific_config *s = srv->config_storage[i];
/* not our stage */
if (COMP_SERVER_SOCKET != dc->comp) continue;
if (dc->cond != CONFIG_COND_EQ) continue;
/* check if we already know this socket,
* if yes, don't init it */
for (j = 0; j < srv->srv_sockets.used; j++) {
if (buffer_is_equal(srv->srv_sockets.ptr[j]->srv_token, dc->string)) {
break;
}
}
if (j == srv->srv_sockets.used) {
if (0 != network_server_init(srv, dc->string, s)) return -1;
}
}
return 0;
}
void Context::initDH(const std::string& dhParamsFile)
{
#ifndef OPENSSL_NO_DH
// 1024-bit MODP Group with 160-bit prime order subgroup (RFC5114)
// -----BEGIN DH PARAMETERS-----
// MIIBDAKBgQCxC4+WoIDgHd6S3l6uXVTsUsmfvPsGo8aaap3KUtI7YWBz4oZ1oj0Y
// mDjvHi7mUsAT7LSuqQYRIySXXDzUm4O/rMvdfZDEvXCYSI6cIZpzck7/1vrlZEc4
// +qMaT/VbzMChUa9fDci0vUW/N982XBpl5oz9p21NpwjfH7K8LkpDcQKBgQCk0cvV
// w/00EmdlpELvuZkF+BBN0lisUH/WQGz/FCZtMSZv6h5cQVZLd35pD1UE8hMWAhe0
// sBuIal6RVH+eJ0n01/vX07mpLuGQnQ0iY/gKdqaiTAh6CR9THb8KAWm2oorWYqTR
// jnOvoy13nVkY0IvIhY9Nzvl8KiSFXm7rIrOy5QICAKA=
// -----END DH PARAMETERS-----
//
static const unsigned char dh1024_p[] =
{
0xB1,0x0B,0x8F,0x96,0xA0,0x80,0xE0,0x1D,0xDE,0x92,0xDE,0x5E,
0xAE,0x5D,0x54,0xEC,0x52,0xC9,0x9F,0xBC,0xFB,0x06,0xA3,0xC6,
0x9A,0x6A,0x9D,0xCA,0x52,0xD2,0x3B,0x61,0x60,0x73,0xE2,0x86,
0x75,0xA2,0x3D,0x18,0x98,0x38,0xEF,0x1E,0x2E,0xE6,0x52,0xC0,
0x13,0xEC,0xB4,0xAE,0xA9,0x06,0x11,0x23,0x24,0x97,0x5C,0x3C,
0xD4,0x9B,0x83,0xBF,0xAC,0xCB,0xDD,0x7D,0x90,0xC4,0xBD,0x70,
0x98,0x48,0x8E,0x9C,0x21,0x9A,0x73,0x72,0x4E,0xFF,0xD6,0xFA,
0xE5,0x64,0x47,0x38,0xFA,0xA3,0x1A,0x4F,0xF5,0x5B,0xCC,0xC0,
0xA1,0x51,0xAF,0x5F,0x0D,0xC8,0xB4,0xBD,0x45,0xBF,0x37,0xDF,
0x36,0x5C,0x1A,0x65,0xE6,0x8C,0xFD,0xA7,0x6D,0x4D,0xA7,0x08,
0xDF,0x1F,0xB2,0xBC,0x2E,0x4A,0x43,0x71,
};
static const unsigned char dh1024_g[] =
{
0xA4,0xD1,0xCB,0xD5,0xC3,0xFD,0x34,0x12,0x67,0x65,0xA4,0x42,
0xEF,0xB9,0x99,0x05,0xF8,0x10,0x4D,0xD2,0x58,0xAC,0x50,0x7F,
0xD6,0x40,0x6C,0xFF,0x14,0x26,0x6D,0x31,0x26,0x6F,0xEA,0x1E,
0x5C,0x41,0x56,0x4B,0x77,0x7E,0x69,0x0F,0x55,0x04,0xF2,0x13,
0x16,0x02,0x17,0xB4,0xB0,0x1B,0x88,0x6A,0x5E,0x91,0x54,0x7F,
0x9E,0x27,0x49,0xF4,0xD7,0xFB,0xD7,0xD3,0xB9,0xA9,0x2E,0xE1,
0x90,0x9D,0x0D,0x22,0x63,0xF8,0x0A,0x76,0xA6,0xA2,0x4C,0x08,
0x7A,0x09,0x1F,0x53,0x1D,0xBF,0x0A,0x01,0x69,0xB6,0xA2,0x8A,
0xD6,0x62,0xA4,0xD1,0x8E,0x73,0xAF,0xA3,0x2D,0x77,0x9D,0x59,
0x18,0xD0,0x8B,0xC8,0x85,0x8F,0x4D,0xCE,0xF9,0x7C,0x2A,0x24,
0x85,0x5E,0x6E,0xEB,0x22,0xB3,0xB2,0xE5,
};
DH* dh = 0;
if (!dhParamsFile.empty())
{
BIO* bio = BIO_new_file(dhParamsFile.c_str(), "r");
if (!bio)
{
std::string msg = Utility::getLastError();
throw SSLContextException(std::string("Error opening Diffie-Hellman parameters file ") + dhParamsFile, msg);
}
dh = PEM_read_bio_DHparams(bio, 0, 0, 0);
BIO_free(bio);
if (!dh)
{
std::string msg = Utility::getLastError();
throw SSLContextException(std::string("Error reading Diffie-Hellman parameters from file ") + dhParamsFile, msg);
}
}
else
{
dh = DH_new();
if (!dh)
{
std::string msg = Utility::getLastError();
throw SSLContextException("Error creating Diffie-Hellman parameters", msg);
}
#if OPENSSL_VERSION_NUMBER >= 0x10100000L
BIGNUM* p = BN_bin2bn(dh1024_p, sizeof(dh1024_p), 0);
BIGNUM* g = BN_bin2bn(dh1024_g, sizeof(dh1024_g), 0);
DH_set0_pqg(dh, p, 0, g);
DH_set_length(dh, 160);
if (!p || !g)
{
DH_free(dh);
throw SSLContextException("Error creating Diffie-Hellman parameters");
}
#else
dh->p = BN_bin2bn(dh1024_p, sizeof(dh1024_p), 0);
dh->g = BN_bin2bn(dh1024_g, sizeof(dh1024_g), 0);
dh->length = 160;
if ((!dh->p) || (!dh->g))
{
DH_free(dh);
throw SSLContextException("Error creating Diffie-Hellman parameters");
}
#endif
}
SSL_CTX_set_tmp_dh(_pSSLContext, dh);
SSL_CTX_set_options(_pSSLContext, SSL_OP_SINGLE_DH_USE);
DH_free(dh);
#else
if (!dhParamsFile.empty())
throw SSLContextException("OpenSSL does not support DH");
#endif
}
ERL_NIF_TERM dh_generate_key_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{/* (PrivKey|undefined, DHParams=[P,G], Mpint, Len|0) */
DH *dh_params = NULL;
int mpint; /* 0 or 4 */
{
ERL_NIF_TERM head, tail;
BIGNUM
*dh_p = NULL,
*dh_g = NULL,
*priv_key_in = NULL;
unsigned long
len = 0;
if (!(get_bn_from_bin(env, argv[0], &priv_key_in)
|| argv[0] == atom_undefined)
|| !enif_get_list_cell(env, argv[1], &head, &tail)
|| !get_bn_from_bin(env, head, &dh_p)
|| !enif_get_list_cell(env, tail, &head, &tail)
|| !get_bn_from_bin(env, head, &dh_g)
|| !enif_is_empty_list(env, tail)
|| !enif_get_int(env, argv[2], &mpint) || (mpint & ~4)
|| !enif_get_ulong(env, argv[3], &len)
/* Load dh_params with values to use by the generator.
Mem mgmnt transfered from dh_p etc to dh_params */
|| !(dh_params = DH_new())
|| (priv_key_in && !DH_set0_key(dh_params, NULL, priv_key_in))
|| !DH_set0_pqg(dh_params, dh_p, NULL, dh_g)
) {
if (priv_key_in) BN_free(priv_key_in);
if (dh_p) BN_free(dh_p);
if (dh_g) BN_free(dh_g);
if (dh_params) DH_free(dh_params);
return enif_make_badarg(env);
}
if (len) {
if (len < BN_num_bits(dh_p))
DH_set_length(dh_params, len);
else {
if (priv_key_in) BN_free(priv_key_in);
if (dh_p) BN_free(dh_p);
if (dh_g) BN_free(dh_g);
if (dh_params) DH_free(dh_params);
return enif_make_badarg(env);
}
}
}
#ifdef HAS_EVP_PKEY_CTX
{
EVP_PKEY_CTX *ctx;
EVP_PKEY *dhkey, *params;
int success;
params = EVP_PKEY_new();
success = EVP_PKEY_set1_DH(params, dh_params); /* set the key referenced by params to dh_params... */
DH_free(dh_params); /* ...dh_params (and params) must be freed */
if (!success) return atom_error;
ctx = EVP_PKEY_CTX_new(params, NULL);
EVP_PKEY_free(params);
if (!ctx) {
return atom_error;
}
if (!EVP_PKEY_keygen_init(ctx)) {
/* EVP_PKEY_CTX_free(ctx); */
return atom_error;
}
dhkey = EVP_PKEY_new();
if (!EVP_PKEY_keygen(ctx, &dhkey)) { /* "performs a key generation operation, the ... */
/*... generated key is written to ppkey." (=last arg) */
/* EVP_PKEY_CTX_free(ctx); */
/* EVP_PKEY_free(dhkey); */
return atom_error;
}
dh_params = EVP_PKEY_get1_DH(dhkey); /* return the referenced key. dh_params and dhkey must be freed */
EVP_PKEY_free(dhkey);
if (!dh_params) {
/* EVP_PKEY_CTX_free(ctx); */
return atom_error;
}
EVP_PKEY_CTX_free(ctx);
}
#else
if (!DH_generate_key(dh_params)) return atom_error;
#endif
{
unsigned char *pub_ptr, *prv_ptr;
int pub_len, prv_len;
ERL_NIF_TERM ret_pub, ret_prv;
const BIGNUM *pub_key_gen, *priv_key_gen;
DH_get0_key(dh_params,
&pub_key_gen, &priv_key_gen); /* Get pub_key_gen and priv_key_gen.
"The values point to the internal representation of
the public key and private key values. This memory
should not be freed directly." says man */
pub_len = BN_num_bytes(pub_key_gen);
prv_len = BN_num_bytes(priv_key_gen);
pub_ptr = enif_make_new_binary(env, pub_len+mpint, &ret_pub);
prv_ptr = enif_make_new_binary(env, prv_len+mpint, &ret_prv);
if (mpint) {
put_int32(pub_ptr, pub_len); pub_ptr += 4;
put_int32(prv_ptr, prv_len); prv_ptr += 4;
}
BN_bn2bin(pub_key_gen, pub_ptr);
BN_bn2bin(priv_key_gen, prv_ptr);
ERL_VALGRIND_MAKE_MEM_DEFINED(pub_ptr, pub_len);
ERL_VALGRIND_MAKE_MEM_DEFINED(prv_ptr, prv_len);
DH_free(dh_params);
return enif_make_tuple2(env, ret_pub, ret_prv);
}
}
