stream: Gather streams to src/streams

1 files changed, 0 insertions, 657 deletions

diff --git a/src/openssl_stream.c b/src/openssl_stream.c
deleted file mode 100644
index 3860c4f3c..000000000
--- a/src/openssl_stream.c
+++ /dev/null
@@ -1,657 +0,0 @@
-/*
- * Copyright (C) the libgit2 contributors. All rights reserved.
- *
- * This file is part of libgit2, distributed under the GNU GPL v2 with
- * a Linking Exception. For full terms see the included COPYING file.
- */
-
-#include "openssl_stream.h"
-
-#ifdef GIT_OPENSSL
-
-#include <ctype.h>
-
-#include "global.h"
-#include "posix.h"
-#include "stream.h"
-#include "socket_stream.h"
-#include "netops.h"
-#include "git2/transport.h"
-#include "git2/sys/openssl.h"
-
-#ifdef GIT_CURL
-# include "curl_stream.h"
-#endif
-
-#ifndef GIT_WIN32
-# include <sys/types.h>
-# include <sys/socket.h>
-# include <netinet/in.h>
-#endif
-
-#include <openssl/ssl.h>
-#include <openssl/err.h>
-#include <openssl/x509v3.h>
-#include <openssl/bio.h>
-
-SSL_CTX *git__ssl_ctx;
-
-#define GIT_SSL_DEFAULT_CIPHERS "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-DSS-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA:DHE-DSS-AES128-SHA256:DHE-DSS-AES256-SHA256:DHE-DSS-AES128-SHA:DHE-DSS-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA"
-
-#if defined(GIT_THREADS) && OPENSSL_VERSION_NUMBER < 0x10100000L
-
-static git_mutex *openssl_locks;
-
-static void openssl_locking_function(
-	int mode, int n, const char *file, int line)
-{
-	int lock;
-
-	GIT_UNUSED(file);
-	GIT_UNUSED(line);
-
-	lock = mode & CRYPTO_LOCK;
-
-	if (lock) {
-		git_mutex_lock(&openssl_locks[n]);
-	} else {
-		git_mutex_unlock(&openssl_locks[n]);
-	}
-}
-
-static void shutdown_ssl_locking(void)
-{
-	int num_locks, i;
-
-	num_locks = CRYPTO_num_locks();
-	CRYPTO_set_locking_callback(NULL);
-
-	for (i = 0; i < num_locks; ++i)
-		git_mutex_free(&openssl_locks[i]);
-	git__free(openssl_locks);
-}
-
-#endif /* GIT_THREADS && OPENSSL_VERSION_NUMBER < 0x10100000L */
-
-static BIO_METHOD *git_stream_bio_method;
-static int init_bio_method(void);
-
-/**
- * This function aims to clean-up the SSL context which
- * we allocated.
- */
-static void shutdown_ssl(void)
-{
-	if (git_stream_bio_method) {
-		BIO_meth_free(git_stream_bio_method);
-		git_stream_bio_method = NULL;
-	}
-
-	if (git__ssl_ctx) {
-		SSL_CTX_free(git__ssl_ctx);
-		git__ssl_ctx = NULL;
-	}
-}
-
-int git_openssl_stream_global_init(void)
-{
-#ifdef GIT_OPENSSL
-	long ssl_opts = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3;
-	const char *ciphers = git_libgit2__ssl_ciphers();
-
-	/* Older OpenSSL and MacOS OpenSSL doesn't have this */
-#ifdef SSL_OP_NO_COMPRESSION
-	ssl_opts |= SSL_OP_NO_COMPRESSION;
-#endif
-
-#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
-	SSL_load_error_strings();
-	OpenSSL_add_ssl_algorithms();
-#else
-	OPENSSL_init_ssl(0, NULL);
-#endif
-
-	/*
-	 * Load SSLv{2,3} and TLSv1 so that we can talk with servers
-	 * which use the SSL hellos, which are often used for
-	 * compatibility. We then disable SSL so we only allow OpenSSL
-	 * to speak TLSv1 to perform the encryption itself.
-	 */
-	git__ssl_ctx = SSL_CTX_new(SSLv23_method());
-	SSL_CTX_set_options(git__ssl_ctx, ssl_opts);
-	SSL_CTX_set_mode(git__ssl_ctx, SSL_MODE_AUTO_RETRY);
-	SSL_CTX_set_verify(git__ssl_ctx, SSL_VERIFY_NONE, NULL);
-	if (!SSL_CTX_set_default_verify_paths(git__ssl_ctx)) {
-		SSL_CTX_free(git__ssl_ctx);
-		git__ssl_ctx = NULL;
-		return -1;
-	}
-
-	if (!ciphers) {
-		ciphers = GIT_SSL_DEFAULT_CIPHERS;
-	}
-
-	if(!SSL_CTX_set_cipher_list(git__ssl_ctx, ciphers)) {
-		SSL_CTX_free(git__ssl_ctx);
-		git__ssl_ctx = NULL;
-		return -1;
-	}
-
-	if (init_bio_method() < 0) {
-		SSL_CTX_free(git__ssl_ctx);
-		git__ssl_ctx = NULL;
-		return -1;
-	}
-
-#endif
-
-	git__on_shutdown(shutdown_ssl);
-
-	return 0;
-}
-
-int git_openssl_set_locking(void)
-{
-#if defined(GIT_THREADS) && OPENSSL_VERSION_NUMBER < 0x10100000L
-	int num_locks, i;
-
-	num_locks = CRYPTO_num_locks();
-	openssl_locks = git__calloc(num_locks, sizeof(git_mutex));
-	GITERR_CHECK_ALLOC(openssl_locks);
-
-	for (i = 0; i < num_locks; i++) {
-		if (git_mutex_init(&openssl_locks[i]) != 0) {
-			giterr_set(GITERR_SSL, "failed to initialize openssl locks");
-			return -1;
-		}
-	}
-
-	CRYPTO_set_locking_callback(openssl_locking_function);
-	git__on_shutdown(shutdown_ssl_locking);
-	return 0;
-#elif OPENSSL_VERSION_NUMBER >= 0x10100000L
-	return 0;
-#else
-	giterr_set(GITERR_THREAD, "libgit2 was not built with threads");
-	return -1;
-#endif
-}
-
-
-static int bio_create(BIO *b)
-{
-	BIO_set_init(b, 1);
-	BIO_set_data(b, NULL);
-
-	return 1;
-}
-
-static int bio_destroy(BIO *b)
-{
-	if (!b)
-		return 0;
-
-	BIO_set_data(b, NULL);
-
-	return 1;
-}
-
-static int bio_read(BIO *b, char *buf, int len)
-{
-	git_stream *io = (git_stream *) BIO_get_data(b);
-
-	return (int) git_stream_read(io, buf, len);
-}
-
-static int bio_write(BIO *b, const char *buf, int len)
-{
-	git_stream *io = (git_stream *) BIO_get_data(b);
-
-	return (int) git_stream_write(io, buf, len, 0);
-}
-
-static long bio_ctrl(BIO *b, int cmd, long num, void *ptr)
-{
-	GIT_UNUSED(b);
-	GIT_UNUSED(num);
-	GIT_UNUSED(ptr);
-
-	if (cmd == BIO_CTRL_FLUSH)
-		return 1;
-
-	return 0;
-}
-
-static int bio_gets(BIO *b, char *buf, int len)
-{
-	GIT_UNUSED(b);
-	GIT_UNUSED(buf);
-	GIT_UNUSED(len);
-	return -1;
-}
-
-static int bio_puts(BIO *b, const char *str)
-{
-	return bio_write(b, str, strlen(str));
-}
-
-static int init_bio_method(void)
-{
-	/* Set up the BIO_METHOD we use for wrapping our own stream implementations */
-	git_stream_bio_method = BIO_meth_new(BIO_TYPE_SOURCE_SINK | BIO_get_new_index(), "git_stream");
-	GITERR_CHECK_ALLOC(git_stream_bio_method);
-
-	BIO_meth_set_write(git_stream_bio_method, bio_write);
-	BIO_meth_set_read(git_stream_bio_method, bio_read);
-	BIO_meth_set_puts(git_stream_bio_method, bio_puts);
-	BIO_meth_set_gets(git_stream_bio_method, bio_gets);
-	BIO_meth_set_ctrl(git_stream_bio_method, bio_ctrl);
-	BIO_meth_set_create(git_stream_bio_method, bio_create);
-	BIO_meth_set_destroy(git_stream_bio_method, bio_destroy);
-
-	return 0;
-}
-
-static int ssl_set_error(SSL *ssl, int error)
-{
-	int err;
-	unsigned long e;
-
-	err = SSL_get_error(ssl, error);
-
-	assert(err != SSL_ERROR_WANT_READ);
-	assert(err != SSL_ERROR_WANT_WRITE);
-
-	switch (err) {
-	case SSL_ERROR_WANT_CONNECT:
-	case SSL_ERROR_WANT_ACCEPT:
-		giterr_set(GITERR_NET, "SSL error: connection failure");
-		break;
-	case SSL_ERROR_WANT_X509_LOOKUP:
-		giterr_set(GITERR_NET, "SSL error: x509 error");
-		break;
-	case SSL_ERROR_SYSCALL:
-		e = ERR_get_error();
-		if (e > 0) {
-			giterr_set(GITERR_NET, "SSL error: %s",
-					ERR_error_string(e, NULL));
-			break;
-		} else if (error < 0) {
-			giterr_set(GITERR_OS, "SSL error: syscall failure");
-			break;
-		}
-		giterr_set(GITERR_NET, "SSL error: received early EOF");
-		return GIT_EEOF;
-		break;
-	case SSL_ERROR_SSL:
-		e = ERR_get_error();
-		giterr_set(GITERR_NET, "SSL error: %s",
-				ERR_error_string(e, NULL));
-		break;
-	case SSL_ERROR_NONE:
-	case SSL_ERROR_ZERO_RETURN:
-	default:
-		giterr_set(GITERR_NET, "SSL error: unknown error");
-		break;
-	}
-	return -1;
-}
-
-static int ssl_teardown(SSL *ssl)
-{
-	int ret;
-
-	ret = SSL_shutdown(ssl);
-	if (ret < 0)
-		ret = ssl_set_error(ssl, ret);
-	else
-		ret = 0;
-
-	return ret;
-}
-
-static int check_host_name(const char *name, const char *host)
-{
-	if (!strcasecmp(name, host))
-		return 0;
-
-	if (gitno__match_host(name, host) < 0)
-		return -1;
-
-	return 0;
-}
-
-static int verify_server_cert(SSL *ssl, const char *host)
-{
-	X509 *cert;
-	X509_NAME *peer_name;
-	ASN1_STRING *str;
-	unsigned char *peer_cn = NULL;
-	int matched = -1, type = GEN_DNS;
-	GENERAL_NAMES *alts;
-	struct in6_addr addr6;
-	struct in_addr addr4;
-	void *addr;
-	int i = -1,j;
-
-	if (SSL_get_verify_result(ssl) != X509_V_OK) {
-		giterr_set(GITERR_SSL, "the SSL certificate is invalid");
-		return GIT_ECERTIFICATE;
-	}
-
-	/* Try to parse the host as an IP address to see if it is */
-	if (p_inet_pton(AF_INET, host, &addr4)) {
-		type = GEN_IPADD;
-		addr = &addr4;
-	} else {
-		if(p_inet_pton(AF_INET6, host, &addr6)) {
-			type = GEN_IPADD;
-			addr = &addr6;
-		}
-	}
-
-
-	cert = SSL_get_peer_certificate(ssl);
-	if (!cert) {
-		giterr_set(GITERR_SSL, "the server did not provide a certificate");
-		return -1;
-	}
-
-	/* Check the alternative names */
-	alts = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
-	if (alts) {
-		int num;
-
-		num = sk_GENERAL_NAME_num(alts);
-		for (i = 0; i < num && matched != 1; i++) {
-			const GENERAL_NAME *gn = sk_GENERAL_NAME_value(alts, i);
-			const char *name = (char *) ASN1_STRING_get0_data(gn->d.ia5);
-			size_t namelen = (size_t) ASN1_STRING_length(gn->d.ia5);
-
-			/* Skip any names of a type we're not looking for */
-			if (gn->type != type)
-				continue;
-
-			if (type == GEN_DNS) {
-				/* If it contains embedded NULs, don't even try */
-				if (memchr(name, '\0', namelen))
-					continue;
-
-				if (check_host_name(name, host) < 0)
-					matched = 0;
-				else
-					matched = 1;
-			} else if (type == GEN_IPADD) {
-				/* Here name isn't so much a name but a binary representation of the IP */
-				matched = !!memcmp(name, addr, namelen);
-			}
-		}
-	}
-	GENERAL_NAMES_free(alts);
-
-	if (matched == 0)
-		goto cert_fail_name;
-
-	if (matched == 1)
-		return 0;
-
-	/* If no alternative names are available, check the common name */
-	peer_name = X509_get_subject_name(cert);
-	if (peer_name == NULL)
-		goto on_error;
-
-	if (peer_name) {
-		/* Get the index of the last CN entry */
-		while ((j = X509_NAME_get_index_by_NID(peer_name, NID_commonName, i)) >= 0)
-			i = j;
-	}
-
-	if (i < 0)
-		goto on_error;
-
-	str = X509_NAME_ENTRY_get_data(X509_NAME_get_entry(peer_name, i));
-	if (str == NULL)
-		goto on_error;
-
-	/* Work around a bug in OpenSSL whereby ASN1_STRING_to_UTF8 fails if it's already in utf-8 */
-	if (ASN1_STRING_type(str) == V_ASN1_UTF8STRING) {
-		int size = ASN1_STRING_length(str);
-
-		if (size > 0) {
-			peer_cn = OPENSSL_malloc(size + 1);
-			GITERR_CHECK_ALLOC(peer_cn);
-			memcpy(peer_cn, ASN1_STRING_get0_data(str), size);
-			peer_cn[size] = '\0';
-		} else {
-			goto cert_fail_name;
-		}
-	} else {
-		int size = ASN1_STRING_to_UTF8(&peer_cn, str);
-		GITERR_CHECK_ALLOC(peer_cn);
-		if (memchr(peer_cn, '\0', size))
-			goto cert_fail_name;
-	}
-
-	if (check_host_name((char *)peer_cn, host) < 0)
-		goto cert_fail_name;
-
-	OPENSSL_free(peer_cn);
-
-	return 0;
-
-on_error:
-	OPENSSL_free(peer_cn);
-	return ssl_set_error(ssl, 0);
-
-cert_fail_name:
-	OPENSSL_free(peer_cn);
-	giterr_set(GITERR_SSL, "hostname does not match certificate");
-	return GIT_ECERTIFICATE;
-}
-
-typedef struct {
-	git_stream parent;
-	git_stream *io;
-	bool connected;
-	char *host;
-	SSL *ssl;
-	git_cert_x509 cert_info;
-} openssl_stream;
-
-int openssl_close(git_stream *stream);
-
-int openssl_connect(git_stream *stream)
-{
-	int ret;
-	BIO *bio;
-	openssl_stream *st = (openssl_stream *) stream;
-
-	if ((ret = git_stream_connect(st->io)) < 0)
-		return ret;
-
-	st->connected = true;
-
-	bio = BIO_new(git_stream_bio_method);
-	GITERR_CHECK_ALLOC(bio);
-
-	BIO_set_data(bio, st->io);
-	SSL_set_bio(st->ssl, bio, bio);
-
-	/* specify the host in case SNI is needed */
-#ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
-	SSL_set_tlsext_host_name(st->ssl, st->host);
-#endif
-
-	if ((ret = SSL_connect(st->ssl)) <= 0)
-		return ssl_set_error(st->ssl, ret);
-
-	return verify_server_cert(st->ssl, st->host);
-}
-
-int openssl_certificate(git_cert **out, git_stream *stream)
-{
-	openssl_stream *st = (openssl_stream *) stream;
-	int len;
-	X509 *cert = SSL_get_peer_certificate(st->ssl);
-	unsigned char *guard, *encoded_cert;
-
-	/* Retrieve the length of the certificate first */
-	len = i2d_X509(cert, NULL);
-	if (len < 0) {
-		giterr_set(GITERR_NET, "failed to retrieve certificate information");
-		return -1;
-	}
-
-	encoded_cert = git__malloc(len);
-	GITERR_CHECK_ALLOC(encoded_cert);
-	/* i2d_X509 makes 'guard' point to just after the data */
-	guard = encoded_cert;
-
-	len = i2d_X509(cert, &guard);
-	if (len < 0) {
-		git__free(encoded_cert);
-		giterr_set(GITERR_NET, "failed to retrieve certificate information");
-		return -1;
-	}
-
-	st->cert_info.parent.cert_type = GIT_CERT_X509;
-	st->cert_info.data = encoded_cert;
-	st->cert_info.len = len;
-
-	*out = &st->cert_info.parent;
-
-	return 0;
-}
-
-static int openssl_set_proxy(git_stream *stream, const git_proxy_options *proxy_opts)
-{
-	openssl_stream *st = (openssl_stream *) stream;
-
-	return git_stream_set_proxy(st->io, proxy_opts);
-}
-
-ssize_t openssl_write(git_stream *stream, const char *data, size_t len, int flags)
-{
-	openssl_stream *st = (openssl_stream *) stream;
-	int ret;
-
-	GIT_UNUSED(flags);
-
-	if ((ret = SSL_write(st->ssl, data, len)) <= 0) {
-		return ssl_set_error(st->ssl, ret);
-	}
-
-	return ret;
-}
-
-ssize_t openssl_read(git_stream *stream, void *data, size_t len)
-{
-	openssl_stream *st = (openssl_stream *) stream;
-	int ret;
-
-	if ((ret = SSL_read(st->ssl, data, len)) <= 0)
-		return ssl_set_error(st->ssl, ret);
-
-	return ret;
-}
-
-int openssl_close(git_stream *stream)
-{
-	openssl_stream *st = (openssl_stream *) stream;
-	int ret;
-
-	if (st->connected && (ret = ssl_teardown(st->ssl)) < 0)
-		return -1;
-
-	st->connected = false;
-
-	return git_stream_close(st->io);
-}
-
-void openssl_free(git_stream *stream)
-{
-	openssl_stream *st = (openssl_stream *) stream;
-
-	SSL_free(st->ssl);
-	git__free(st->host);
-	git__free(st->cert_info.data);
-	git_stream_free(st->io);
-	git__free(st);
-}
-
-int git_openssl_stream_new(git_stream **out, const char *host, const char *port)
-{
-	int error;
-	openssl_stream *st;
-
-	st = git__calloc(1, sizeof(openssl_stream));
-	GITERR_CHECK_ALLOC(st);
-
-	st->io = NULL;
-#ifdef GIT_CURL
-	error = git_curl_stream_new(&st->io, host, port);
-#else
-	error = git_socket_stream_new(&st->io, host, port);
-#endif
-
-	if (error < 0)
-		goto out_err;
-
-	st->ssl = SSL_new(git__ssl_ctx);
-	if (st->ssl == NULL) {
-		giterr_set(GITERR_SSL, "failed to create ssl object");
-		error = -1;
-		goto out_err;
-	}
-
-	st->host = git__strdup(host);
-	GITERR_CHECK_ALLOC(st->host);
-
-	st->parent.version = GIT_STREAM_VERSION;
-	st->parent.encrypted = 1;
-	st->parent.proxy_support = git_stream_supports_proxy(st->io);
-	st->parent.connect = openssl_connect;
-	st->parent.certificate = openssl_certificate;
-	st->parent.set_proxy = openssl_set_proxy;
-	st->parent.read = openssl_read;
-	st->parent.write = openssl_write;
-	st->parent.close = openssl_close;
-	st->parent.free = openssl_free;
-
-	*out = (git_stream *) st;
-	return 0;
-
-out_err:
-	git_stream_free(st->io);
-	git__free(st);
-
-	return error;
-}
-
-#else
-
-#include "stream.h"
-#include "git2/sys/openssl.h"
-
-int git_openssl_stream_global_init(void)
-{
-	return 0;
-}
-
-int git_openssl_set_locking(void)
-{
-	giterr_set(GITERR_SSL, "libgit2 was not built with OpenSSL support");
-	return -1;
-}
-
-int git_openssl_stream_new(git_stream **out, const char *host, const char *port)
-{
-	GIT_UNUSED(out);
-	GIT_UNUSED(host);
-	GIT_UNUSED(port);
-
-	giterr_set(GITERR_SSL, "openssl is not supported in this version");
-	return -1;
-}
-
-#endif