/
gskit.c
1308 lines (1145 loc) · 39.1 KB
/
gskit.c
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "curl_setup.h"
#ifdef USE_GSKIT
#include <gskssl.h>
#include <qsoasync.h>
#undef HAVE_SOCKETPAIR /* because the native one isn't good enough */
#include "socketpair.h"
/* Some symbols are undefined/unsupported on OS400 versions < V7R1. */
#ifndef GSK_SSL_EXTN_SERVERNAME_REQUEST
#define GSK_SSL_EXTN_SERVERNAME_REQUEST 230
#endif
#ifndef GSK_TLSV10_CIPHER_SPECS
#define GSK_TLSV10_CIPHER_SPECS 236
#endif
#ifndef GSK_TLSV11_CIPHER_SPECS
#define GSK_TLSV11_CIPHER_SPECS 237
#endif
#ifndef GSK_TLSV12_CIPHER_SPECS
#define GSK_TLSV12_CIPHER_SPECS 238
#endif
#ifndef GSK_PROTOCOL_TLSV11
#define GSK_PROTOCOL_TLSV11 437
#endif
#ifndef GSK_PROTOCOL_TLSV12
#define GSK_PROTOCOL_TLSV12 438
#endif
#ifndef GSK_FALSE
#define GSK_FALSE 0
#endif
#ifndef GSK_TRUE
#define GSK_TRUE 1
#endif
#include <limits.h>
#include <curl/curl.h>
#include "urldata.h"
#include "sendf.h"
#include "gskit.h"
#include "vtls.h"
#include "connect.h" /* for the connect timeout */
#include "select.h"
#include "strcase.h"
#include "x509asn1.h"
#include "curl_printf.h"
#include "curl_memory.h"
/* The last #include file should be: */
#include "memdebug.h"
/* Directions. */
#define SOS_READ 0x01
#define SOS_WRITE 0x02
/* SSL version flags. */
#define CURL_GSKPROTO_SSLV2 0
#define CURL_GSKPROTO_SSLV2_MASK (1 << CURL_GSKPROTO_SSLV2)
#define CURL_GSKPROTO_SSLV3 1
#define CURL_GSKPROTO_SSLV3_MASK (1 << CURL_GSKPROTO_SSLV3)
#define CURL_GSKPROTO_TLSV10 2
#define CURL_GSKPROTO_TLSV10_MASK (1 << CURL_GSKPROTO_TLSV10)
#define CURL_GSKPROTO_TLSV11 3
#define CURL_GSKPROTO_TLSV11_MASK (1 << CURL_GSKPROTO_TLSV11)
#define CURL_GSKPROTO_TLSV12 4
#define CURL_GSKPROTO_TLSV12_MASK (1 << CURL_GSKPROTO_TLSV12)
#define CURL_GSKPROTO_LAST 5
struct ssl_backend_data {
gsk_handle handle;
int iocport;
#ifndef CURL_DISABLE_PROXY
int localfd;
int remotefd;
#endif
};
#define BACKEND connssl->backend
/* Supported ciphers. */
struct gskit_cipher {
const char *name; /* Cipher name. */
const char *gsktoken; /* Corresponding token for GSKit String. */
unsigned int versions; /* SSL version flags. */
};
static const struct gskit_cipher ciphertable[] = {
{ "null-md5", "01",
CURL_GSKPROTO_SSLV3_MASK | CURL_GSKPROTO_TLSV10_MASK |
CURL_GSKPROTO_TLSV11_MASK | CURL_GSKPROTO_TLSV12_MASK },
{ "null-sha", "02",
CURL_GSKPROTO_SSLV3_MASK | CURL_GSKPROTO_TLSV10_MASK |
CURL_GSKPROTO_TLSV11_MASK | CURL_GSKPROTO_TLSV12_MASK },
{ "exp-rc4-md5", "03",
CURL_GSKPROTO_SSLV3_MASK | CURL_GSKPROTO_TLSV10_MASK },
{ "rc4-md5", "04",
CURL_GSKPROTO_SSLV3_MASK | CURL_GSKPROTO_TLSV10_MASK |
CURL_GSKPROTO_TLSV11_MASK | CURL_GSKPROTO_TLSV12_MASK },
{ "rc4-sha", "05",
CURL_GSKPROTO_SSLV3_MASK | CURL_GSKPROTO_TLSV10_MASK |
CURL_GSKPROTO_TLSV11_MASK | CURL_GSKPROTO_TLSV12_MASK },
{ "exp-rc2-cbc-md5", "06",
CURL_GSKPROTO_SSLV3_MASK | CURL_GSKPROTO_TLSV10_MASK },
{ "exp-des-cbc-sha", "09",
CURL_GSKPROTO_SSLV3_MASK | CURL_GSKPROTO_TLSV10_MASK |
CURL_GSKPROTO_TLSV11_MASK },
{ "des-cbc3-sha", "0A",
CURL_GSKPROTO_SSLV3_MASK | CURL_GSKPROTO_TLSV10_MASK |
CURL_GSKPROTO_TLSV11_MASK | CURL_GSKPROTO_TLSV12_MASK },
{ "aes128-sha", "2F",
CURL_GSKPROTO_TLSV10_MASK | CURL_GSKPROTO_TLSV11_MASK |
CURL_GSKPROTO_TLSV12_MASK },
{ "aes256-sha", "35",
CURL_GSKPROTO_TLSV10_MASK | CURL_GSKPROTO_TLSV11_MASK |
CURL_GSKPROTO_TLSV12_MASK },
{ "null-sha256", "3B", CURL_GSKPROTO_TLSV12_MASK },
{ "aes128-sha256", "3C", CURL_GSKPROTO_TLSV12_MASK },
{ "aes256-sha256", "3D", CURL_GSKPROTO_TLSV12_MASK },
{ "aes128-gcm-sha256",
"9C", CURL_GSKPROTO_TLSV12_MASK },
{ "aes256-gcm-sha384",
"9D", CURL_GSKPROTO_TLSV12_MASK },
{ "rc4-md5", "1", CURL_GSKPROTO_SSLV2_MASK },
{ "exp-rc4-md5", "2", CURL_GSKPROTO_SSLV2_MASK },
{ "rc2-md5", "3", CURL_GSKPROTO_SSLV2_MASK },
{ "exp-rc2-md5", "4", CURL_GSKPROTO_SSLV2_MASK },
{ "des-cbc-md5", "6", CURL_GSKPROTO_SSLV2_MASK },
{ "des-cbc3-md5", "7", CURL_GSKPROTO_SSLV2_MASK },
{ (const char *) NULL, (const char *) NULL, 0 }
};
static bool is_separator(char c)
{
/* Return whether character is a cipher list separator. */
switch(c) {
case ' ':
case '\t':
case ':':
case ',':
case ';':
return true;
}
return false;
}
static CURLcode gskit_status(struct Curl_easy *data, int rc,
const char *procname, CURLcode defcode)
{
/* Process GSKit status and map it to a CURLcode. */
switch(rc) {
case GSK_OK:
case GSK_OS400_ASYNCHRONOUS_SOC_INIT:
return CURLE_OK;
case GSK_KEYRING_OPEN_ERROR:
case GSK_OS400_ERROR_NO_ACCESS:
return CURLE_SSL_CACERT_BADFILE;
case GSK_INSUFFICIENT_STORAGE:
return CURLE_OUT_OF_MEMORY;
case GSK_ERROR_BAD_V2_CIPHER:
case GSK_ERROR_BAD_V3_CIPHER:
case GSK_ERROR_NO_CIPHERS:
return CURLE_SSL_CIPHER;
case GSK_OS400_ERROR_NOT_TRUSTED_ROOT:
case GSK_ERROR_CERT_VALIDATION:
return CURLE_PEER_FAILED_VERIFICATION;
case GSK_OS400_ERROR_TIMED_OUT:
return CURLE_OPERATION_TIMEDOUT;
case GSK_WOULD_BLOCK:
return CURLE_AGAIN;
case GSK_OS400_ERROR_NOT_REGISTERED:
break;
case GSK_ERROR_IO:
switch(errno) {
case ENOMEM:
return CURLE_OUT_OF_MEMORY;
default:
failf(data, "%s I/O error: %s", procname, strerror(errno));
break;
}
break;
default:
failf(data, "%s: %s", procname, gsk_strerror(rc));
break;
}
return defcode;
}
static CURLcode set_enum(struct Curl_easy *data, gsk_handle h,
GSK_ENUM_ID id, GSK_ENUM_VALUE value, bool unsupported_ok)
{
int rc = gsk_attribute_set_enum(h, id, value);
switch(rc) {
case GSK_OK:
return CURLE_OK;
case GSK_ERROR_IO:
failf(data, "gsk_attribute_set_enum() I/O error: %s", strerror(errno));
break;
case GSK_ATTRIBUTE_INVALID_ID:
if(unsupported_ok)
return CURLE_UNSUPPORTED_PROTOCOL;
default:
failf(data, "gsk_attribute_set_enum(): %s", gsk_strerror(rc));
break;
}
return CURLE_SSL_CONNECT_ERROR;
}
static CURLcode set_buffer(struct Curl_easy *data, gsk_handle h,
GSK_BUF_ID id, const char *buffer, bool unsupported_ok)
{
int rc = gsk_attribute_set_buffer(h, id, buffer, 0);
switch(rc) {
case GSK_OK:
return CURLE_OK;
case GSK_ERROR_IO:
failf(data, "gsk_attribute_set_buffer() I/O error: %s", strerror(errno));
break;
case GSK_ATTRIBUTE_INVALID_ID:
if(unsupported_ok)
return CURLE_UNSUPPORTED_PROTOCOL;
default:
failf(data, "gsk_attribute_set_buffer(): %s", gsk_strerror(rc));
break;
}
return CURLE_SSL_CONNECT_ERROR;
}
static CURLcode set_numeric(struct Curl_easy *data,
gsk_handle h, GSK_NUM_ID id, int value)
{
int rc = gsk_attribute_set_numeric_value(h, id, value);
switch(rc) {
case GSK_OK:
return CURLE_OK;
case GSK_ERROR_IO:
failf(data, "gsk_attribute_set_numeric_value() I/O error: %s",
strerror(errno));
break;
default:
failf(data, "gsk_attribute_set_numeric_value(): %s", gsk_strerror(rc));
break;
}
return CURLE_SSL_CONNECT_ERROR;
}
static CURLcode set_callback(struct Curl_easy *data,
gsk_handle h, GSK_CALLBACK_ID id, void *info)
{
int rc = gsk_attribute_set_callback(h, id, info);
switch(rc) {
case GSK_OK:
return CURLE_OK;
case GSK_ERROR_IO:
failf(data, "gsk_attribute_set_callback() I/O error: %s", strerror(errno));
break;
default:
failf(data, "gsk_attribute_set_callback(): %s", gsk_strerror(rc));
break;
}
return CURLE_SSL_CONNECT_ERROR;
}
static CURLcode set_ciphers(struct Curl_easy *data,
gsk_handle h, unsigned int *protoflags)
{
const char *cipherlist = SSL_CONN_CONFIG(cipher_list);
const char *clp;
const struct gskit_cipher *ctp;
int i;
int l;
bool unsupported;
CURLcode result;
struct {
char *buf;
char *ptr;
} ciphers[CURL_GSKPROTO_LAST];
/* Compile cipher list into GSKit-compatible cipher lists. */
if(!cipherlist)
return CURLE_OK;
while(is_separator(*cipherlist)) /* Skip initial separators. */
cipherlist++;
if(!*cipherlist)
return CURLE_OK;
/* We allocate GSKit buffers of the same size as the input string: since
GSKit tokens are always shorter than their cipher names, allocated buffers
will always be large enough to accommodate the result. */
l = strlen(cipherlist) + 1;
memset((char *) ciphers, 0, sizeof(ciphers));
for(i = 0; i < CURL_GSKPROTO_LAST; i++) {
ciphers[i].buf = malloc(l);
if(!ciphers[i].buf) {
while(i--)
free(ciphers[i].buf);
return CURLE_OUT_OF_MEMORY;
}
ciphers[i].ptr = ciphers[i].buf;
*ciphers[i].ptr = '\0';
}
/* Process each cipher in input string. */
unsupported = FALSE;
result = CURLE_OK;
for(;;) {
for(clp = cipherlist; *cipherlist && !is_separator(*cipherlist);)
cipherlist++;
l = cipherlist - clp;
if(!l)
break;
/* Search the cipher in our table. */
for(ctp = ciphertable; ctp->name; ctp++)
if(strncasecompare(ctp->name, clp, l) && !ctp->name[l])
break;
if(!ctp->name) {
failf(data, "Unknown cipher %.*s", l, clp);
result = CURLE_SSL_CIPHER;
}
else {
unsupported |= !(ctp->versions & (CURL_GSKPROTO_SSLV2_MASK |
CURL_GSKPROTO_SSLV3_MASK | CURL_GSKPROTO_TLSV10_MASK));
for(i = 0; i < CURL_GSKPROTO_LAST; i++) {
if(ctp->versions & (1 << i)) {
strcpy(ciphers[i].ptr, ctp->gsktoken);
ciphers[i].ptr += strlen(ctp->gsktoken);
}
}
}
/* Advance to next cipher name or end of string. */
while(is_separator(*cipherlist))
cipherlist++;
}
/* Disable protocols with empty cipher lists. */
for(i = 0; i < CURL_GSKPROTO_LAST; i++) {
if(!(*protoflags & (1 << i)) || !ciphers[i].buf[0]) {
*protoflags &= ~(1 << i);
ciphers[i].buf[0] = '\0';
}
}
/* Try to set-up TLSv1.1 and TLSv2.1 ciphers. */
if(*protoflags & CURL_GSKPROTO_TLSV11_MASK) {
result = set_buffer(data, h, GSK_TLSV11_CIPHER_SPECS,
ciphers[CURL_GSKPROTO_TLSV11].buf, TRUE);
if(result == CURLE_UNSUPPORTED_PROTOCOL) {
result = CURLE_OK;
if(unsupported) {
failf(data, "TLSv1.1-only ciphers are not yet supported");
result = CURLE_SSL_CIPHER;
}
}
}
if(!result && (*protoflags & CURL_GSKPROTO_TLSV12_MASK)) {
result = set_buffer(data, h, GSK_TLSV12_CIPHER_SPECS,
ciphers[CURL_GSKPROTO_TLSV12].buf, TRUE);
if(result == CURLE_UNSUPPORTED_PROTOCOL) {
result = CURLE_OK;
if(unsupported) {
failf(data, "TLSv1.2-only ciphers are not yet supported");
result = CURLE_SSL_CIPHER;
}
}
}
/* Try to set-up TLSv1.0 ciphers. If not successful, concatenate them to
the SSLv3 ciphers. OS/400 prior to version 7.1 will understand it. */
if(!result && (*protoflags & CURL_GSKPROTO_TLSV10_MASK)) {
result = set_buffer(data, h, GSK_TLSV10_CIPHER_SPECS,
ciphers[CURL_GSKPROTO_TLSV10].buf, TRUE);
if(result == CURLE_UNSUPPORTED_PROTOCOL) {
result = CURLE_OK;
strcpy(ciphers[CURL_GSKPROTO_SSLV3].ptr,
ciphers[CURL_GSKPROTO_TLSV10].ptr);
}
}
/* Set-up other ciphers. */
if(!result && (*protoflags & CURL_GSKPROTO_SSLV3_MASK))
result = set_buffer(data, h, GSK_V3_CIPHER_SPECS,
ciphers[CURL_GSKPROTO_SSLV3].buf, FALSE);
if(!result && (*protoflags & CURL_GSKPROTO_SSLV2_MASK))
result = set_buffer(data, h, GSK_V2_CIPHER_SPECS,
ciphers[CURL_GSKPROTO_SSLV2].buf, FALSE);
/* Clean-up. */
for(i = 0; i < CURL_GSKPROTO_LAST; i++)
free(ciphers[i].buf);
return result;
}
static int gskit_init(void)
{
/* No initialisation needed. */
return 1;
}
static void gskit_cleanup(void)
{
/* Nothing to do. */
}
static CURLcode init_environment(struct Curl_easy *data,
gsk_handle *envir, const char *appid,
const char *file, const char *label,
const char *password)
{
int rc;
CURLcode result;
gsk_handle h;
/* Creates the GSKit environment. */
rc = gsk_environment_open(&h);
switch(rc) {
case GSK_OK:
break;
case GSK_INSUFFICIENT_STORAGE:
return CURLE_OUT_OF_MEMORY;
default:
failf(data, "gsk_environment_open(): %s", gsk_strerror(rc));
return CURLE_SSL_CONNECT_ERROR;
}
result = set_enum(data, h, GSK_SESSION_TYPE, GSK_CLIENT_SESSION, FALSE);
if(!result && appid)
result = set_buffer(data, h, GSK_OS400_APPLICATION_ID, appid, FALSE);
if(!result && file)
result = set_buffer(data, h, GSK_KEYRING_FILE, file, FALSE);
if(!result && label)
result = set_buffer(data, h, GSK_KEYRING_LABEL, label, FALSE);
if(!result && password)
result = set_buffer(data, h, GSK_KEYRING_PW, password, FALSE);
if(!result) {
/* Locate CAs, Client certificate and key according to our settings.
Note: this call may be blocking for some tenths of seconds. */
result = gskit_status(data, gsk_environment_init(h),
"gsk_environment_init()", CURLE_SSL_CERTPROBLEM);
if(!result) {
*envir = h;
return result;
}
}
/* Error: rollback. */
gsk_environment_close(&h);
return result;
}
static void cancel_async_handshake(struct connectdata *conn, int sockindex)
{
struct ssl_connect_data *connssl = &conn->ssl[sockindex];
Qso_OverlappedIO_t cstat;
if(QsoCancelOperation(conn->sock[sockindex], 0) > 0)
QsoWaitForIOCompletion(BACKEND->iocport, &cstat, (struct timeval *) NULL);
}
static void close_async_handshake(struct ssl_connect_data *connssl)
{
QsoDestroyIOCompletionPort(BACKEND->iocport);
BACKEND->iocport = -1;
}
static int pipe_ssloverssl(struct connectdata *conn, int sockindex,
int directions)
{
#ifndef CURL_DISABLE_PROXY
struct ssl_connect_data *connssl = &conn->ssl[sockindex];
struct ssl_connect_data *connproxyssl = &conn->proxy_ssl[sockindex];
fd_set fds_read;
fd_set fds_write;
int n;
int m;
int i;
int ret = 0;
char buf[CURL_MAX_WRITE_SIZE];
if(!connssl->use || !connproxyssl->use)
return 0; /* No SSL over SSL: OK. */
FD_ZERO(&fds_read);
FD_ZERO(&fds_write);
n = -1;
if(directions & SOS_READ) {
FD_SET(BACKEND->remotefd, &fds_write);
n = BACKEND->remotefd;
}
if(directions & SOS_WRITE) {
FD_SET(BACKEND->remotefd, &fds_read);
n = BACKEND->remotefd;
FD_SET(conn->sock[sockindex], &fds_write);
if(n < conn->sock[sockindex])
n = conn->sock[sockindex];
}
i = Curl_select(n + 1, &fds_read, &fds_write, NULL, 0);
if(i < 0)
return -1; /* Select error. */
if(FD_ISSET(BACKEND->remotefd, &fds_write)) {
/* Try getting data from HTTPS proxy and pipe it upstream. */
n = 0;
i = gsk_secure_soc_read(connproxyssl->backend->handle,
buf, sizeof(buf), &n);
switch(i) {
case GSK_OK:
if(n) {
i = write(BACKEND->remotefd, buf, n);
if(i < 0)
return -1;
ret = 1;
}
break;
case GSK_OS400_ERROR_TIMED_OUT:
case GSK_WOULD_BLOCK:
break;
default:
return -1;
}
}
if(FD_ISSET(BACKEND->remotefd, &fds_read) &&
FD_ISSET(conn->sock[sockindex], &fds_write)) {
/* Pipe data to HTTPS proxy. */
n = read(BACKEND->remotefd, buf, sizeof(buf));
if(n < 0)
return -1;
if(n) {
i = gsk_secure_soc_write(connproxyssl->backend->handle, buf, n, &m);
if(i != GSK_OK || n != m)
return -1;
ret = 1;
}
}
return ret; /* OK */
#else
return 0;
#endif
}
static void close_one(struct ssl_connect_data *connssl, struct Curl_easy *data,
struct connectdata *conn, int sockindex)
{
if(BACKEND->handle) {
gskit_status(data, gsk_secure_soc_close(&BACKEND->handle),
"gsk_secure_soc_close()", 0);
/* Last chance to drain output. */
while(pipe_ssloverssl(conn, sockindex, SOS_WRITE) > 0)
;
BACKEND->handle = (gsk_handle) NULL;
#ifndef CURL_DISABLE_PROXY
if(BACKEND->localfd >= 0) {
close(BACKEND->localfd);
BACKEND->localfd = -1;
}
if(BACKEND->remotefd >= 0) {
close(BACKEND->remotefd);
BACKEND->remotefd = -1;
}
#endif
}
if(BACKEND->iocport >= 0)
close_async_handshake(connssl);
}
static ssize_t gskit_send(struct Curl_easy *data, int sockindex,
const void *mem, size_t len, CURLcode *curlcode)
{
struct connectdata *conn = data->conn;
struct ssl_connect_data *connssl = &conn->ssl[sockindex];
CURLcode cc = CURLE_SEND_ERROR;
int written;
if(pipe_ssloverssl(conn, sockindex, SOS_WRITE) >= 0) {
cc = gskit_status(data,
gsk_secure_soc_write(BACKEND->handle,
(char *) mem, (int) len, &written),
"gsk_secure_soc_write()", CURLE_SEND_ERROR);
if(cc == CURLE_OK)
if(pipe_ssloverssl(conn, sockindex, SOS_WRITE) < 0)
cc = CURLE_SEND_ERROR;
}
if(cc != CURLE_OK) {
*curlcode = cc;
written = -1;
}
return (ssize_t) written; /* number of bytes */
}
static ssize_t gskit_recv(struct Curl_easy *data, int num, char *buf,
size_t buffersize, CURLcode *curlcode)
{
struct connectdata *conn = data->conn;
struct ssl_connect_data *connssl = &conn->ssl[num];
int nread;
CURLcode cc = CURLE_RECV_ERROR;
if(pipe_ssloverssl(conn, num, SOS_READ) >= 0) {
int buffsize = buffersize > (size_t) INT_MAX? INT_MAX: (int) buffersize;
cc = gskit_status(data, gsk_secure_soc_read(BACKEND->handle,
buf, buffsize, &nread),
"gsk_secure_soc_read()", CURLE_RECV_ERROR);
}
switch(cc) {
case CURLE_OK:
break;
case CURLE_OPERATION_TIMEDOUT:
cc = CURLE_AGAIN;
default:
*curlcode = cc;
nread = -1;
break;
}
return (ssize_t) nread;
}
static CURLcode
set_ssl_version_min_max(unsigned int *protoflags, struct Curl_easy *data)
{
long ssl_version = SSL_CONN_CONFIG(version);
long ssl_version_max = SSL_CONN_CONFIG(version_max);
long i = ssl_version;
switch(ssl_version_max) {
case CURL_SSLVERSION_MAX_NONE:
case CURL_SSLVERSION_MAX_DEFAULT:
ssl_version_max = CURL_SSLVERSION_TLSv1_2;
break;
}
for(; i <= (ssl_version_max >> 16); ++i) {
switch(i) {
case CURL_SSLVERSION_TLSv1_0:
*protoflags |= CURL_GSKPROTO_TLSV10_MASK;
break;
case CURL_SSLVERSION_TLSv1_1:
*protoflags |= CURL_GSKPROTO_TLSV11_MASK;
break;
case CURL_SSLVERSION_TLSv1_2:
*protoflags |= CURL_GSKPROTO_TLSV11_MASK;
break;
case CURL_SSLVERSION_TLSv1_3:
failf(data, "GSKit: TLS 1.3 is not yet supported");
return CURLE_SSL_CONNECT_ERROR;
}
}
return CURLE_OK;
}
static CURLcode gskit_connect_step1(struct Curl_easy *data,
struct connectdata *conn, int sockindex)
{
struct ssl_connect_data *connssl = &conn->ssl[sockindex];
gsk_handle envir;
CURLcode result;
const char * const keyringfile = SSL_CONN_CONFIG(CAfile);
const char * const keyringpwd = SSL_SET_OPTION(key_passwd);
const char * const keyringlabel = SSL_SET_OPTION(primary.clientcert);
const long int ssl_version = SSL_CONN_CONFIG(version);
const bool verifypeer = SSL_CONN_CONFIG(verifypeer);
const char * const hostname = SSL_HOST_NAME();
const char *sni;
unsigned int protoflags = 0;
Qso_OverlappedIO_t commarea;
#ifndef CURL_DISABLE_PROXY
int sockpair[2];
static const int sobufsize = CURL_MAX_WRITE_SIZE;
#endif
/* Create SSL environment, start (preferably asynchronous) handshake. */
BACKEND->handle = (gsk_handle) NULL;
BACKEND->iocport = -1;
#ifndef CURL_DISABLE_PROXY
BACKEND->localfd = -1;
BACKEND->remotefd = -1;
#endif
/* GSKit supports two ways of specifying an SSL context: either by
* application identifier (that should have been defined at the system
* level) or by keyring file, password and certificate label.
* Local certificate name (CURLOPT_SSLCERT) is used to hold either the
* application identifier of the certificate label.
* Key password (CURLOPT_KEYPASSWD) holds the keyring password.
* It is not possible to have different keyrings for the CAs and the
* local certificate. We thus use the CA file (CURLOPT_CAINFO) to identify
* the keyring file.
* If no key password is given and the keyring is the system keyring,
* application identifier mode is tried first, as recommended in IBM doc.
*/
envir = (gsk_handle) NULL;
if(keyringlabel && *keyringlabel && !keyringpwd &&
!strcmp(keyringfile, CURL_CA_BUNDLE)) {
/* Try application identifier mode. */
init_environment(data, &envir, keyringlabel, (const char *) NULL,
(const char *) NULL, (const char *) NULL);
}
if(!envir) {
/* Use keyring mode. */
result = init_environment(data, &envir, (const char *) NULL,
keyringfile, keyringlabel, keyringpwd);
if(result)
return result;
}
/* Create secure session. */
result = gskit_status(data, gsk_secure_soc_open(envir, &BACKEND->handle),
"gsk_secure_soc_open()", CURLE_SSL_CONNECT_ERROR);
gsk_environment_close(&envir);
if(result)
return result;
#ifndef CURL_DISABLE_PROXY
/* Establish a pipelining socket pair for SSL over SSL. */
if(conn->proxy_ssl[sockindex].use) {
if(Curl_socketpair(0, 0, 0, sockpair))
return CURLE_SSL_CONNECT_ERROR;
BACKEND->localfd = sockpair[0];
BACKEND->remotefd = sockpair[1];
setsockopt(BACKEND->localfd, SOL_SOCKET, SO_RCVBUF,
(void *) sobufsize, sizeof(sobufsize));
setsockopt(BACKEND->remotefd, SOL_SOCKET, SO_RCVBUF,
(void *) sobufsize, sizeof(sobufsize));
setsockopt(BACKEND->localfd, SOL_SOCKET, SO_SNDBUF,
(void *) sobufsize, sizeof(sobufsize));
setsockopt(BACKEND->remotefd, SOL_SOCKET, SO_SNDBUF,
(void *) sobufsize, sizeof(sobufsize));
curlx_nonblock(BACKEND->localfd, TRUE);
curlx_nonblock(BACKEND->remotefd, TRUE);
}
#endif
/* Determine which SSL/TLS version should be enabled. */
sni = hostname;
switch(ssl_version) {
case CURL_SSLVERSION_SSLv2:
protoflags = CURL_GSKPROTO_SSLV2_MASK;
sni = NULL;
break;
case CURL_SSLVERSION_SSLv3:
protoflags = CURL_GSKPROTO_SSLV3_MASK;
sni = NULL;
break;
case CURL_SSLVERSION_DEFAULT:
case CURL_SSLVERSION_TLSv1:
protoflags = CURL_GSKPROTO_TLSV10_MASK |
CURL_GSKPROTO_TLSV11_MASK | CURL_GSKPROTO_TLSV12_MASK;
break;
case CURL_SSLVERSION_TLSv1_0:
case CURL_SSLVERSION_TLSv1_1:
case CURL_SSLVERSION_TLSv1_2:
case CURL_SSLVERSION_TLSv1_3:
result = set_ssl_version_min_max(&protoflags, data);
if(result != CURLE_OK)
return result;
break;
default:
failf(data, "Unrecognized parameter passed via CURLOPT_SSLVERSION");
return CURLE_SSL_CONNECT_ERROR;
}
/* Process SNI. Ignore if not supported (on OS400 < V7R1). */
if(sni) {
result = set_buffer(data, BACKEND->handle,
GSK_SSL_EXTN_SERVERNAME_REQUEST, sni, TRUE);
if(result == CURLE_UNSUPPORTED_PROTOCOL)
result = CURLE_OK;
}
/* Set session parameters. */
if(!result) {
/* Compute the handshake timeout. Since GSKit granularity is 1 second,
we round up the required value. */
timediff_t timeout = Curl_timeleft(data, NULL, TRUE);
if(timeout < 0)
result = CURLE_OPERATION_TIMEDOUT;
else
result = set_numeric(data, BACKEND->handle, GSK_HANDSHAKE_TIMEOUT,
(timeout + 999) / 1000);
}
if(!result)
result = set_numeric(data, BACKEND->handle, GSK_OS400_READ_TIMEOUT, 1);
if(!result)
#ifndef CURL_DISABLE_PROXY
result = set_numeric(data, BACKEND->handle, GSK_FD, BACKEND->localfd >= 0?
BACKEND->localfd: conn->sock[sockindex]);
#else
result = set_numeric(data, BACKEND->handle, GSK_FD,
conn->sock[sockindex]);
#endif
if(!result)
result = set_ciphers(data, BACKEND->handle, &protoflags);
if(!protoflags) {
failf(data, "No SSL protocol/cipher combination enabled");
result = CURLE_SSL_CIPHER;
}
if(!result)
result = set_enum(data, BACKEND->handle, GSK_PROTOCOL_SSLV2,
(protoflags & CURL_GSKPROTO_SSLV2_MASK)?
GSK_PROTOCOL_SSLV2_ON: GSK_PROTOCOL_SSLV2_OFF, FALSE);
if(!result)
result = set_enum(data, BACKEND->handle, GSK_PROTOCOL_SSLV3,
(protoflags & CURL_GSKPROTO_SSLV3_MASK)?
GSK_PROTOCOL_SSLV3_ON: GSK_PROTOCOL_SSLV3_OFF, FALSE);
if(!result)
result = set_enum(data, BACKEND->handle, GSK_PROTOCOL_TLSV1,
(protoflags & CURL_GSKPROTO_TLSV10_MASK)?
GSK_PROTOCOL_TLSV1_ON: GSK_PROTOCOL_TLSV1_OFF, FALSE);
if(!result) {
result = set_enum(data, BACKEND->handle, GSK_PROTOCOL_TLSV11,
(protoflags & CURL_GSKPROTO_TLSV11_MASK)?
GSK_TRUE: GSK_FALSE, TRUE);
if(result == CURLE_UNSUPPORTED_PROTOCOL) {
result = CURLE_OK;
if(protoflags == CURL_GSKPROTO_TLSV11_MASK) {
failf(data, "TLS 1.1 not yet supported");
result = CURLE_SSL_CIPHER;
}
}
}
if(!result) {
result = set_enum(data, BACKEND->handle, GSK_PROTOCOL_TLSV12,
(protoflags & CURL_GSKPROTO_TLSV12_MASK)?
GSK_TRUE: GSK_FALSE, TRUE);
if(result == CURLE_UNSUPPORTED_PROTOCOL) {
result = CURLE_OK;
if(protoflags == CURL_GSKPROTO_TLSV12_MASK) {
failf(data, "TLS 1.2 not yet supported");
result = CURLE_SSL_CIPHER;
}
}
}
if(!result)
result = set_enum(data, BACKEND->handle, GSK_SERVER_AUTH_TYPE,
verifypeer? GSK_SERVER_AUTH_FULL:
GSK_SERVER_AUTH_PASSTHRU, FALSE);
if(!result) {
/* Start handshake. Try asynchronous first. */
memset(&commarea, 0, sizeof(commarea));
BACKEND->iocport = QsoCreateIOCompletionPort();
if(BACKEND->iocport != -1) {
result = gskit_status(data,
gsk_secure_soc_startInit(BACKEND->handle,
BACKEND->iocport,
&commarea),
"gsk_secure_soc_startInit()",
CURLE_SSL_CONNECT_ERROR);
if(!result) {
connssl->connecting_state = ssl_connect_2;
return CURLE_OK;
}
else
close_async_handshake(connssl);
}
else if(errno != ENOBUFS)
result = gskit_status(data, GSK_ERROR_IO,
"QsoCreateIOCompletionPort()", 0);
#ifndef CURL_DISABLE_PROXY
else if(conn->proxy_ssl[sockindex].use) {
/* Cannot pipeline while handshaking synchronously. */
result = CURLE_SSL_CONNECT_ERROR;
}
#endif
else {
/* No more completion port available. Use synchronous IO. */
result = gskit_status(data, gsk_secure_soc_init(BACKEND->handle),
"gsk_secure_soc_init()", CURLE_SSL_CONNECT_ERROR);
if(!result) {
connssl->connecting_state = ssl_connect_3;
return CURLE_OK;
}
}
}
/* Error: rollback. */
close_one(connssl, data, conn, sockindex);
return result;
}
static CURLcode gskit_connect_step2(struct Curl_easy *data,
struct connectdata *conn, int sockindex,
bool nonblocking)
{
struct ssl_connect_data *connssl = &conn->ssl[sockindex];
Qso_OverlappedIO_t cstat;
struct timeval stmv;
CURLcode result;
/* Poll or wait for end of SSL asynchronous handshake. */
for(;;) {
timediff_t timeout_ms = nonblocking? 0: Curl_timeleft(data, NULL, TRUE);
if(timeout_ms < 0)
timeout_ms = 0;
stmv.tv_sec = timeout_ms / 1000;
stmv.tv_usec = (timeout_ms - stmv.tv_sec * 1000) * 1000;
switch(QsoWaitForIOCompletion(BACKEND->iocport, &cstat, &stmv)) {
case 1: /* Operation complete. */
break;
case -1: /* An error occurred: handshake still in progress. */
if(errno == EINTR) {
if(nonblocking)
return CURLE_OK;
continue; /* Retry. */
}
if(errno != ETIME) {
failf(data, "QsoWaitForIOCompletion() I/O error: %s", strerror(errno));
cancel_async_handshake(conn, sockindex);
close_async_handshake(connssl);
return CURLE_SSL_CONNECT_ERROR;
}
/* FALL INTO... */
case 0: /* Handshake in progress, timeout occurred. */
if(nonblocking)
return CURLE_OK;
cancel_async_handshake(conn, sockindex);
close_async_handshake(connssl);
return CURLE_OPERATION_TIMEDOUT;
}
break;
}
result = gskit_status(data, cstat.returnValue, "SSL handshake",
CURLE_SSL_CONNECT_ERROR);
if(!result)
connssl->connecting_state = ssl_connect_3;
close_async_handshake(connssl);
return result;
}
static CURLcode gskit_connect_step3(struct Curl_easy *data,
struct connectdata *conn, int sockindex)
{
struct ssl_connect_data *connssl = &conn->ssl[sockindex];
const gsk_cert_data_elem *cdev;
int cdec;
const gsk_cert_data_elem *p;
const char *cert = (const char *) NULL;
const char *certend;
const char *ptr;