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Copy pathssl_stubs.c
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ssl_stubs.c
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/*
* Copyright (C) 2003-2005 Samuel Mimram
*
* This file is part of Ocaml-ssl.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* Libssl bindings for OCaml.
*
* @author Samuel Mimram
*/
/*
* WARNING: because of thread callbacks, all ssl functions should be in
* blocking sections.
*/
#include <unistd.h>
#include <string.h>
#include <assert.h>
#include <caml/alloc.h>
#include <caml/callback.h>
#include <caml/custom.h>
#include <caml/fail.h>
#include <caml/memory.h>
#include <caml/mlvalues.h>
#include <caml/signals.h>
#include <caml/unixsupport.h>
#include <caml/bigarray.h>
#include <openssl/ssl.h>
#include <openssl/pem.h>
#include <openssl/err.h>
#include <openssl/crypto.h>
#include <openssl/tls1.h>
#include <openssl/x509v3.h>
#include "ocaml_ssl.h"
#ifdef WIN32
#include <windows.h>
#else
#include <pthread.h>
#endif
static int client_verify_callback(int, X509_STORE_CTX *);
static DH *load_dh_param(const char *dhfile);
/*******************
* Data structures *
*******************/
/* Contexts */
#define Ctx_val(v) (*((SSL_CTX**)Data_custom_val(v)))
static void finalize_ctx(value block)
{
SSL_CTX *ctx = Ctx_val(block);
SSL_CTX_free(ctx);
}
static struct custom_operations ctx_ops =
{
"ocaml_ssl_ctx",
finalize_ctx,
custom_compare_default,
custom_hash_default,
custom_serialize_default,
custom_deserialize_default
};
/* Sockets */
#define SSL_val(v) (*((SSL**)Data_custom_val(v)))
static void finalize_ssl_socket(value block)
{
SSL *ssl = SSL_val(block);
SSL_free(ssl);
}
static struct custom_operations socket_ops =
{
"ocaml_ssl_socket",
finalize_ssl_socket,
custom_compare_default,
custom_hash_default,
custom_serialize_default,
custom_deserialize_default
};
/* Option types */
#define Val_none Val_int(0)
static value Val_some(value v)
{
CAMLparam1(v);
CAMLlocal1(some);
some = caml_alloc(1, 0);
Store_field(some, 0, v);
CAMLreturn(some);
}
/******************
* Initialization *
******************/
#ifdef WIN32
struct CRYPTO_dynlock_value
{
HANDLE mutex;
};
static HANDLE *mutex_buf = NULL;
static void locking_function(int mode, int n, const char *file, int line)
{
if (mode & CRYPTO_LOCK)
WaitForSingleObject(mutex_buf[n], INFINITE);
else
ReleaseMutex(mutex_buf[n]);
}
static struct CRYPTO_dynlock_value *dyn_create_function(const char *file, int line)
{
struct CRYPTO_dynlock_value *value;
value = malloc(sizeof(struct CRYPTO_dynlock_value));
if (!value)
return NULL;
if (!(value->mutex = CreateMutex(NULL, FALSE, NULL)))
{
free(value);
return NULL;
}
return value;
}
static void dyn_lock_function(int mode, struct CRYPTO_dynlock_value *l, const char *file, int line)
{
if (mode & CRYPTO_LOCK)
WaitForSingleObject(l->mutex, INFINITE);
else
ReleaseMutex(l->mutex);
}
static void dyn_destroy_function(struct CRYPTO_dynlock_value *l, const char *file, int line)
{
CloseHandle(l->mutex);
free(l);
}
#else
struct CRYPTO_dynlock_value
{
pthread_mutex_t mutex;
};
static pthread_mutex_t *mutex_buf = NULL;
static void locking_function(int mode, int n, const char *file, int line)
{
if (mode & CRYPTO_LOCK)
pthread_mutex_lock(&mutex_buf[n]);
else
pthread_mutex_unlock(&mutex_buf[n]);
}
static unsigned long id_function(void)
{
return ((unsigned long) pthread_self());
}
static struct CRYPTO_dynlock_value *dyn_create_function(const char *file, int line)
{
struct CRYPTO_dynlock_value *value;
value = malloc(sizeof(struct CRYPTO_dynlock_value));
if (!value)
return NULL;
pthread_mutex_init(&value->mutex, NULL);
return value;
}
static void dyn_lock_function(int mode, struct CRYPTO_dynlock_value *l, const char *file, int line)
{
if (mode & CRYPTO_LOCK)
pthread_mutex_lock(&l->mutex);
else
pthread_mutex_unlock(&l->mutex);
}
static void dyn_destroy_function(struct CRYPTO_dynlock_value *l, const char *file, int line)
{
pthread_mutex_destroy(&l->mutex);
free(l);
}
#endif
CAMLprim value ocaml_ssl_init(value use_threads)
{
int i;
SSL_library_init();
SSL_load_error_strings();
if(Int_val(use_threads))
{
#ifdef WIN32
mutex_buf = malloc(CRYPTO_num_locks() * sizeof(HANDLE));
#else
mutex_buf = malloc(CRYPTO_num_locks() * sizeof(pthread_mutex_t));
#endif
assert(mutex_buf);
for (i = 0; i < CRYPTO_num_locks(); i++)
#ifdef WIN32
mutex_buf[i] = CreateMutex(NULL, FALSE, NULL);
#else
pthread_mutex_init(&mutex_buf[i], NULL);
#endif
CRYPTO_set_locking_callback(locking_function);
#ifndef WIN32
/* Windows does not require id_function, see threads(3) */
CRYPTO_set_id_callback(id_function);
#endif
CRYPTO_set_dynlock_create_callback(dyn_create_function);
CRYPTO_set_dynlock_lock_callback(dyn_lock_function);
CRYPTO_set_dynlock_destroy_callback(dyn_destroy_function);
}
return Val_unit;
}
CAMLprim value ocaml_ssl_get_error_string(value unit)
{
char buf[256];
ERR_error_string_n(ERR_get_error(), buf, sizeof(buf));
return caml_copy_string(buf);
}
/*****************************
* Context-related functions *
*****************************/
static int protocol_flags[] = {
SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3,
SSL_OP_NO_SSLv3,
SSL_OP_NO_TLSv1,
#ifdef HAVE_TLS11
SSL_OP_NO_TLSv1_1
#else
0 /* not supported, nothing to disable */
#endif
,
#ifdef HAVE_TLS12
SSL_OP_NO_TLSv1_2
#else
0 /* not supported ,nothing to disable */
#endif
,
#ifdef HAVE_TLS13
SSL_OP_NO_TLSv1_3
#else
0 /* not supported, nothing to disable */
#endif
};
static const SSL_METHOD *get_method(int protocol, int type)
{
const SSL_METHOD *method = NULL;
caml_enter_blocking_section();
switch (protocol)
{
case 0:
switch (type)
{
case 0:
method = SSLv23_client_method();
break;
case 1:
method = SSLv23_server_method();
break;
case 2:
method = SSLv23_method();
break;
}
break;
#ifndef OPENSSL_NO_SSL3
case 1:
switch (type)
{
case 0:
method = SSLv3_client_method();
break;
case 1:
method = SSLv3_server_method();
break;
case 2:
method = SSLv3_method();
break;
}
break;
#endif
case 2:
switch (type)
{
case 0:
method = TLSv1_client_method();
break;
case 1:
method = TLSv1_server_method();
break;
case 2:
method = TLSv1_method();
break;
}
break;
case 3:
#ifdef HAVE_TLS11
switch (type)
{
case 0:
method = TLSv1_1_client_method();
break;
case 1:
method = TLSv1_1_server_method();
break;
case 2:
method = TLSv1_1_method();
break;
}
#endif
break;
case 4:
#ifdef HAVE_TLS12
switch (type)
{
case 0:
method = TLSv1_2_client_method();
break;
case 1:
method = TLSv1_2_server_method();
break;
case 2:
method = TLSv1_2_method();
break;
}
#endif
break;
case 5:
#ifdef HAVE_TLS13
switch (type)
{
case 0:
method = TLS_client_method();
break;
case 1:
method = TLS_server_method();
break;
case 2:
method = TLS_method();
break;
}
#endif
break;
default:
caml_leave_blocking_section();
caml_invalid_argument("Unknown method (this should not have happened, please report).");
break;
}
caml_leave_blocking_section();
if (method == NULL)
caml_raise_constant(*caml_named_value("ssl_exn_method_error"));
return method;
}
CAMLprim value ocaml_ssl_create_context(value protocol, value type)
{
value block;
SSL_CTX *ctx;
const SSL_METHOD *method = get_method(Int_val(protocol), Int_val(type));
caml_enter_blocking_section();
ctx = SSL_CTX_new(method);
if (!ctx)
{
caml_leave_blocking_section();
caml_raise_constant(*caml_named_value("ssl_exn_context_error"));
}
/* In non-blocking mode, accept a buffer with a different address on
a write retry (since the GC may need to move it). In blocking
mode, hide SSL_ERROR_WANT_(READ|WRITE) from us. */
SSL_CTX_set_mode(ctx, SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER | SSL_MODE_AUTO_RETRY);
caml_leave_blocking_section();
block = caml_alloc_custom(&ctx_ops, sizeof(SSL_CTX*), 0, 1);
Ctx_val(block) = ctx;
return block;
}
CAMLprim value ocaml_ssl_ctx_use_certificate(value context, value cert, value privkey)
{
CAMLparam3(context, cert, privkey);
SSL_CTX *ctx = Ctx_val(context);
const char *cert_name = String_val(cert);
const char *privkey_name = String_val(privkey);
char buf[256];
caml_enter_blocking_section();
if (SSL_CTX_use_certificate_chain_file(ctx, cert_name) <= 0)
{
ERR_error_string_n(ERR_get_error(), buf, sizeof(buf));
caml_leave_blocking_section();
caml_raise_with_arg(*caml_named_value("ssl_exn_certificate_error"), caml_copy_string(buf));
}
if (SSL_CTX_use_PrivateKey_file(ctx, privkey_name, SSL_FILETYPE_PEM) <= 0)
{
ERR_error_string_n(ERR_get_error(), buf, sizeof(buf));
caml_leave_blocking_section();
caml_raise_with_arg(*caml_named_value("ssl_exn_private_key_error"), caml_copy_string(buf));
}
if (!SSL_CTX_check_private_key(ctx))
{
caml_leave_blocking_section();
caml_raise_constant(*caml_named_value("ssl_exn_unmatching_keys"));
}
caml_leave_blocking_section();
CAMLreturn(Val_unit);
}
CAMLprim value ocaml_ssl_ctx_use_certificate_from_string(value context, value cert, value privkey)
{
CAMLparam3(context, cert, privkey);
SSL_CTX *ctx = Ctx_val(context);
const char *cert_data = String_val(cert);
int cert_data_length = caml_string_length(cert);
const char *privkey_data = String_val(privkey);
int privkey_data_length = caml_string_length(privkey);
char buf[256];
X509 *x509_cert = NULL;
RSA *rsa = NULL;
BIO *cbio, *kbio;
cbio = BIO_new_mem_buf((void*)cert_data, cert_data_length);
x509_cert = PEM_read_bio_X509(cbio, NULL, 0, NULL);
if (NULL == x509_cert || SSL_CTX_use_certificate(ctx, x509_cert) <= 0)
{
ERR_error_string_n(ERR_get_error(), buf, sizeof(buf));
caml_raise_with_arg(*caml_named_value("ssl_exn_certificate_error"), caml_copy_string(buf));
}
kbio = BIO_new_mem_buf((void*)privkey_data, privkey_data_length);
rsa = PEM_read_bio_RSAPrivateKey(kbio, NULL, 0, NULL);
if (NULL == rsa || SSL_CTX_use_RSAPrivateKey(ctx, rsa) <= 0)
{
ERR_error_string_n(ERR_get_error(), buf, sizeof(buf));
caml_raise_with_arg(*caml_named_value("ssl_exn_private_key_error"), caml_copy_string(buf));
}
if (!SSL_CTX_check_private_key(ctx))
{
caml_raise_constant(*caml_named_value("ssl_exn_unmatching_keys"));
}
CAMLreturn(Val_unit);
}
CAMLprim value ocaml_ssl_get_verify_result(value socket)
{
CAMLparam1(socket);
int ans;
SSL *ssl = SSL_val(socket);
caml_enter_blocking_section();
ans = SSL_get_verify_result(ssl);
caml_leave_blocking_section();
CAMLreturn(Val_int(ans));
}
CAMLprim value ocaml_ssl_get_verify_error_string(value verrn)
{
int errn = Int_val(verrn);
const char *error_string;
caml_enter_blocking_section();
error_string = X509_verify_cert_error_string(errn);
caml_leave_blocking_section();
return caml_copy_string(error_string);
}
CAMLprim value ocaml_ssl_digest(value vevp, value vcert)
{
CAMLparam2(vevp, vcert);
CAMLlocal1(vdigest);
char buf[384/8];
const EVP_MD *evp;
if (vevp == hash_variant("SHA384"))
evp = EVP_sha384();
else if(vevp == hash_variant("SHA256"))
evp = EVP_sha256();
else
evp = EVP_sha1();
size_t digest_size = EVP_MD_size(evp);
assert(digest_size <= sizeof(buf));
X509 *x509 = *((X509 **) Data_custom_val(vcert));
caml_enter_blocking_section();
int status = X509_digest(x509, evp, (unsigned char*)buf, NULL);
caml_leave_blocking_section();
if (0 == status)
{
ERR_error_string_n(ERR_get_error(), buf, sizeof(buf));
caml_raise_with_arg(*caml_named_value("ssl_exn_certificate_error"), caml_copy_string(buf));
}
vdigest = caml_alloc_string(digest_size);
memcpy(Bytes_val(vdigest), buf, digest_size);
CAMLreturn(vdigest);
}
CAMLprim value ocaml_ssl_get_client_verify_callback_ptr(value unit)
{
return (value)client_verify_callback;
}
static int client_verify_callback_verbose = 1;
CAMLprim value ocaml_ssl_set_client_verify_callback_verbose(value verbose)
{
CAMLparam1(verbose);
client_verify_callback_verbose = Bool_val(verbose);
CAMLreturn(Val_unit);
}
CAMLprim value ocaml_ssl_ctx_set_verify(value context, value vmode, value vcallback)
{
CAMLparam3(context, vmode, vcallback);
SSL_CTX *ctx = Ctx_val(context);
int mode = 0;
value mode_tl = vmode;
int (*callback) (int, X509_STORE_CTX*) = NULL;
if (Is_long(vmode))
mode = SSL_VERIFY_NONE;
while (Is_block(mode_tl))
{
switch(Int_val(Field(mode_tl, 0)))
{
case 0:
mode |= SSL_VERIFY_PEER;
break;
case 1:
mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT | SSL_VERIFY_PEER;
break;
case 2:
mode |= SSL_VERIFY_CLIENT_ONCE | SSL_VERIFY_PEER;
break;
default:
caml_invalid_argument("mode");
}
mode_tl = Field(mode_tl, 1);
}
if (Is_block(vcallback))
callback = (int(*) (int, X509_STORE_CTX*))Field(vcallback, 0);
caml_enter_blocking_section();
SSL_CTX_set_verify(ctx, mode, callback);
caml_leave_blocking_section();
CAMLreturn(Val_unit);
}
CAMLprim value ocaml_ssl_ctx_set_verify_depth(value context, value vdepth)
{
SSL_CTX *ctx = Ctx_val(context);
int depth = Int_val(vdepth);
if (depth < 0)
caml_invalid_argument("depth");
caml_enter_blocking_section();
SSL_CTX_set_verify_depth(ctx, depth);
caml_leave_blocking_section();
return Val_unit;
}
CAMLprim value ocaml_ssl_ctx_set_client_CA_list_from_file(value context, value vfilename)
{
CAMLparam2(context, vfilename);
SSL_CTX *ctx = Ctx_val(context);
const char *filename = String_val(vfilename);
STACK_OF(X509_NAME) *cert_names;
char buf[256];
caml_enter_blocking_section();
cert_names = SSL_load_client_CA_file(filename);
if (cert_names != 0)
SSL_CTX_set_client_CA_list(ctx, cert_names);
else
{
ERR_error_string_n(ERR_get_error(), buf, sizeof(buf));
caml_leave_blocking_section();
caml_raise_with_arg(*caml_named_value("ssl_exn_certificate_error"), caml_copy_string(buf));
}
caml_leave_blocking_section();
CAMLreturn(Val_unit);
}
#ifdef HAVE_ALPN
static int get_alpn_buffer_length(value vprotos)
{
value protos_tl = vprotos;
int total_len = 0;
while (protos_tl != Val_emptylist)
{
total_len += caml_string_length(Field(protos_tl, 0)) + 1;
protos_tl = Field(protos_tl, 1);
}
return total_len;
}
static void build_alpn_protocol_buffer(value vprotos, unsigned char *protos)
{
int proto_idx = 0;
while (vprotos != Val_emptylist)
{
value head = Field(vprotos, 0);
int len = caml_string_length(head);
protos[proto_idx++] = len;
int i;
for (i = 0; i < len; i++)
protos[proto_idx++] = Byte_u(head, i);
vprotos = Field(vprotos, 1);
}
}
CAMLprim value ocaml_ssl_ctx_set_alpn_protos(value context, value vprotos)
{
CAMLparam2(context, vprotos);
SSL_CTX *ctx = Ctx_val(context);
int total_len = get_alpn_buffer_length(vprotos);
unsigned char protos[total_len];
build_alpn_protocol_buffer(vprotos, protos);
caml_enter_blocking_section();
SSL_CTX_set_alpn_protos(ctx, protos, sizeof(protos));
caml_leave_blocking_section();
CAMLreturn(Val_unit);
}
static value build_alpn_protocol_list(const unsigned char *protocol_buffer, unsigned int len)
{
CAMLparam0();
CAMLlocal3(protocol_list, current, tail);
int idx = 0;
protocol_list = Val_emptylist;
while (idx < len)
{
int proto_len = (int) protocol_buffer[idx++];
char proto[proto_len + 1];
int i;
for (i = 0; i < proto_len; i++)
proto[i] = (char) protocol_buffer[idx++];
proto[proto_len] = '\0';
tail = caml_alloc(2, 0);
Store_field(tail, 0, caml_copy_string(proto));
Store_field(tail, 1, Val_emptylist);
if (protocol_list == Val_emptylist)
protocol_list = tail;
else
Store_field(current, 1, tail);
current = tail;
}
CAMLreturn(protocol_list);
}
static int alpn_select_cb(SSL *ssl,
const unsigned char **out,
unsigned char *outlen,
const unsigned char *in,
unsigned int inlen,
void *arg)
{
CAMLparam0();
CAMLlocal3(protocol_list, selected_protocol, selected_protocol_opt);
int len;
caml_leave_blocking_section();
protocol_list = build_alpn_protocol_list(in, inlen);
selected_protocol_opt = caml_callback(*((value*)arg), protocol_list);
if(selected_protocol_opt == Val_none)
{
caml_enter_blocking_section();
return SSL_TLSEXT_ERR_NOACK;
}
selected_protocol = Field(selected_protocol_opt, 0);
len = caml_string_length(selected_protocol);
*out = String_val(selected_protocol);
*outlen = len;
caml_enter_blocking_section();
return SSL_TLSEXT_ERR_OK;
}
CAMLprim value ocaml_ssl_ctx_set_alpn_select_callback(value context, value cb)
{
CAMLparam2(context, cb);
SSL_CTX *ctx = Ctx_val(context);
value *select_cb;
select_cb = malloc(sizeof(value));
*select_cb = cb;
caml_register_global_root(select_cb);
caml_enter_blocking_section();
SSL_CTX_set_alpn_select_cb(ctx, alpn_select_cb, select_cb);
caml_leave_blocking_section();
CAMLreturn(Val_unit);
}
#else
CAMLprim value ocaml_ssl_ctx_set_alpn_protos(value context, value vprotos)
{
CAMLparam2(context, vprotos);
caml_raise_constant(*caml_named_value("ssl_exn_method_error"));
CAMLreturn(Val_unit);
}
CAMLprim value ocaml_ssl_ctx_set_alpn_select_callback(value context, value cb)
{
CAMLparam2(context, cb);
caml_raise_constant(*caml_named_value("ssl_exn_method_error"));
CAMLreturn(Val_unit);
}
#endif
static int pem_passwd_cb(char *buf, int size, int rwflag, void *userdata)
{
value s;
int len;
caml_leave_blocking_section();
s = caml_callback(*((value*)userdata), Val_int(rwflag));
len = caml_string_length(s);
assert(len <= size);
memcpy(buf, String_val(s), len);
caml_enter_blocking_section();
return len;
}
CAMLprim value ocaml_ssl_ctx_set_default_passwd_cb(value context, value cb)
{
CAMLparam2(context, cb);
SSL_CTX *ctx = Ctx_val(context);
value *pcb;
/* TODO: this never gets freed or even unregistered */
pcb = malloc(sizeof(value));
*pcb = cb;
caml_register_global_root(pcb);
caml_enter_blocking_section();
SSL_CTX_set_default_passwd_cb(ctx, pem_passwd_cb);
SSL_CTX_set_default_passwd_cb_userdata(ctx, pcb);
caml_leave_blocking_section();
CAMLreturn(Val_unit);
}
CAMLprim value ocaml_ssl_ctx_honor_cipher_order(value context)
{
CAMLparam1(context);
SSL_CTX *ctx = Ctx_val(context);
SSL_CTX_set_options(ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
CAMLreturn(Val_unit);
}
/****************************
* Cipher-related functions *
****************************/
CAMLprim value ocaml_ssl_ctx_set_cipher_list(value context, value ciphers_string)
{
CAMLparam2(context, ciphers_string);
SSL_CTX *ctx = Ctx_val(context);
const char *ciphers = String_val(ciphers_string);
if(*ciphers == 0)
caml_raise_constant(*caml_named_value("ssl_exn_cipher_error"));
caml_enter_blocking_section();
if(SSL_CTX_set_cipher_list(ctx, ciphers) != 1)
{
caml_leave_blocking_section();
caml_raise_constant(*caml_named_value("ssl_exn_cipher_error"));
}
caml_leave_blocking_section();
CAMLreturn(Val_unit);
}
CAMLprim value ocaml_ssl_disable_protocols(value context, value protocol_list)
{
CAMLparam2(context, protocol_list);
SSL_CTX *ctx = Ctx_val(context);
int flags = caml_convert_flag_list(protocol_list, protocol_flags);
caml_enter_blocking_section();
SSL_CTX_set_options(ctx, flags);
caml_leave_blocking_section();
CAMLreturn(Val_unit);
}
CAMLprim value ocaml_ssl_version(value socket)
{
CAMLparam1(socket);
SSL *ssl = SSL_val(socket);
int version;
int ret;
caml_enter_blocking_section();
version = SSL_version(ssl);
caml_leave_blocking_section();
switch(version) {
case SSL3_VERSION:
ret = 1;
break;
case TLS1_VERSION:
ret = 2;
break;
case TLS1_1_VERSION:
ret = 3;
break;
case TLS1_2_VERSION:
ret = 4;
break;
#ifdef HAVE_TLS13
case TLS1_3_VERSION:
ret = 5;
break;
#endif
default:
caml_failwith("Ssl.version");
}
CAMLreturn(Val_int(ret));
}
CAMLprim value ocaml_ssl_get_current_cipher(value socket)
{
CAMLparam1(socket);
SSL *ssl = SSL_val(socket);
caml_enter_blocking_section();
SSL_CIPHER *cipher = (SSL_CIPHER*)SSL_get_current_cipher(ssl);
caml_leave_blocking_section();
if (!cipher)
caml_raise_constant(*caml_named_value("ssl_exn_cipher_error"));
CAMLreturn((value)cipher);
}
CAMLprim value ocaml_ssl_get_cipher_description(value vcipher)
{
char buf[1024];
SSL_CIPHER *cipher = (SSL_CIPHER*)vcipher;
caml_enter_blocking_section();
SSL_CIPHER_description(cipher, buf, 1024);
caml_leave_blocking_section();
return caml_copy_string(buf);
}
CAMLprim value ocaml_ssl_get_cipher_name(value vcipher)
{
const char *name;
SSL_CIPHER *cipher = (SSL_CIPHER*)vcipher;
caml_enter_blocking_section();
name = SSL_CIPHER_get_name(cipher);
caml_leave_blocking_section();
return caml_copy_string(name);
}
CAMLprim value ocaml_ssl_get_cipher_version(value vcipher)
{
const char *version;
SSL_CIPHER *cipher = (SSL_CIPHER*)vcipher;
caml_enter_blocking_section();
version = SSL_CIPHER_get_version(cipher);
caml_leave_blocking_section();
return caml_copy_string(version);
}
CAMLprim value ocaml_ssl_ctx_init_dh_from_file(value context, value dh_file_path)
{
CAMLparam2(context, dh_file_path);
DH *dh = NULL;
SSL_CTX *ctx = Ctx_val(context);
const char *dh_cfile_path = String_val(dh_file_path);
if(*dh_cfile_path == 0)
caml_raise_constant(*caml_named_value("ssl_exn_diffie_hellman_error"));
dh = load_dh_param(dh_cfile_path);
caml_enter_blocking_section();
if (dh != NULL){
if(SSL_CTX_set_tmp_dh(ctx,dh) != 1){
caml_leave_blocking_section();
caml_raise_constant(*caml_named_value("ssl_exn_diffie_hellman_error"));
}
SSL_CTX_set_options(ctx, SSL_OP_SINGLE_DH_USE);
caml_leave_blocking_section();
DH_free(dh);
}
else{
caml_leave_blocking_section();
caml_raise_constant(*caml_named_value("ssl_exn_diffie_hellman_error"));
}
CAMLreturn(Val_unit);
}
#ifdef HAVE_EC
CAMLprim value ocaml_ssl_ctx_init_ec_from_named_curve(value context, value curve_name)