diff options
Diffstat (limited to 'lib/vtls/gskit.c')
| -rw-r--r-- | lib/vtls/gskit.c | 1053 |
1 files changed, 1053 insertions, 0 deletions
diff --git a/lib/vtls/gskit.c b/lib/vtls/gskit.c new file mode 100644 index 000000000..379f3ab5b --- /dev/null +++ b/lib/vtls/gskit.c @@ -0,0 +1,1053 @@ +/*************************************************************************** + * _ _ ____ _ + * Project ___| | | | _ \| | + * / __| | | | |_) | | + * | (__| |_| | _ <| |___ + * \___|\___/|_| \_\_____| + * + * Copyright (C) 1998 - 2013, 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 http://curl.haxx.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> + +/* 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 + + +#ifdef HAVE_LIMITS_H +# include <limits.h> +#endif + +#include <curl/curl.h> +#include "urldata.h" +#include "sendf.h" +#include "gskit.h" +#include "sslgen.h" +#include "connect.h" /* for the connect timeout */ +#include "select.h" +#include "strequal.h" +#include "x509asn1.h" + +#define _MPRINTF_REPLACE /* use our functions only */ +#include <curl/mprintf.h> + +#include "curl_memory.h" +/* The last #include file should be: */ +#include "memdebug.h" + + +/* 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 + + +/* Supported ciphers. */ +typedef struct { + const char *name; /* Cipher name. */ + const char *gsktoken; /* Corresponding token for GSKit String. */ + unsigned int versions; /* SSL version flags. */ +} gskit_cipher; + +static const 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", "3D", CURL_GSKPROTO_TLSV12_MASK }, + { "aes256-sha256", "3D", 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 SessionHandle *data, int rc, + const char *procname, CURLcode defcode) +{ + CURLcode cc; + + /* 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 SessionHandle *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 SessionHandle *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 SessionHandle *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 SessionHandle *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 SessionHandle *data, + gsk_handle h, unsigned int *protoflags) +{ + const char *cipherlist = data->set.str[STRING_SSL_CIPHER_LIST]; + const char *clp; + const gskit_cipher *ctp; + int i; + int l; + bool unsupported; + CURLcode cc; + 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 accomodate 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; + cc = 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(strnequal(ctp->name, clp, l) && !ctp->name[l]) + break; + if(!ctp->name) { + failf(data, "Unknown cipher %.*s", l, clp); + cc = 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) { + cc = set_buffer(data, h, GSK_TLSV11_CIPHER_SPECS, + ciphers[CURL_GSKPROTO_TLSV11].buf, TRUE); + if(cc == CURLE_UNSUPPORTED_PROTOCOL) { + cc = CURLE_OK; + if(unsupported) { + failf(data, "TLSv1.1-only ciphers are not yet supported"); + cc = CURLE_SSL_CIPHER; + } + } + } + if(cc == CURLE_OK && (*protoflags & CURL_GSKPROTO_TLSV12_MASK)) { + cc = set_buffer(data, h, GSK_TLSV12_CIPHER_SPECS, + ciphers[CURL_GSKPROTO_TLSV12].buf, TRUE); + if(cc == CURLE_UNSUPPORTED_PROTOCOL) { + cc = CURLE_OK; + if(unsupported) { + failf(data, "TLSv1.2-only ciphers are not yet supported"); + cc = 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(cc == CURLE_OK && (*protoflags & CURL_GSKPROTO_TLSV10_MASK)) { + cc = set_buffer(data, h, GSK_TLSV10_CIPHER_SPECS, + ciphers[CURL_GSKPROTO_TLSV10].buf, TRUE); + if(cc == CURLE_UNSUPPORTED_PROTOCOL) { + cc = CURLE_OK; + strcpy(ciphers[CURL_GSKPROTO_SSLV3].ptr, + ciphers[CURL_GSKPROTO_TLSV10].ptr); + } + } + + /* Set-up other ciphers. */ + if(cc == CURLE_OK && (*protoflags & CURL_GSKPROTO_SSLV3_MASK)) + cc = set_buffer(data, h, GSK_V3_CIPHER_SPECS, + ciphers[CURL_GSKPROTO_SSLV3].buf, FALSE); + if(cc == CURLE_OK && (*protoflags & CURL_GSKPROTO_SSLV2_MASK)) + cc = 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 cc; +} + + +int Curl_gskit_init(void) +{ + /* No initialisation needed. */ + + return 1; +} + + +void Curl_gskit_cleanup(void) +{ + /* Nothing to do. */ +} + + +static CURLcode init_environment(struct SessionHandle *data, + gsk_handle *envir, const char *appid, + const char *file, const char *label, + const char *password) +{ + int rc; + CURLcode c; + 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; + } + + c = set_enum(data, h, GSK_SESSION_TYPE, GSK_CLIENT_SESSION, FALSE); + if(c == CURLE_OK && appid) + c = set_buffer(data, h, GSK_OS400_APPLICATION_ID, appid, FALSE); + if(c == CURLE_OK && file) + c = set_buffer(data, h, GSK_KEYRING_FILE, file, FALSE); + if(c == CURLE_OK && label) + c = set_buffer(data, h, GSK_KEYRING_LABEL, label, FALSE); + if(c == CURLE_OK && password) + c = set_buffer(data, h, GSK_KEYRING_PW, password, FALSE); + + if(c == CURLE_OK) { + /* Locate CAs, Client certificate and key according to our settings. + Note: this call may be blocking for some tenths of seconds. */ + c = gskit_status(data, gsk_environment_init(h), + "gsk_environment_init()", CURLE_SSL_CERTPROBLEM); + if(c == CURLE_OK) { + *envir = h; + return c; + } + } + /* Error: rollback. */ + gsk_environment_close(&h); + return c; +} + + +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(connssl->iocport, &cstat, (struct timeval *) NULL); +} + + +static void close_async_handshake(struct ssl_connect_data *connssl) +{ + QsoDestroyIOCompletionPort(connssl->iocport); + connssl->iocport = -1; +} + + +static void close_one(struct ssl_connect_data *conn, + struct SessionHandle *data) +{ + if(conn->handle) { + gskit_status(data, gsk_secure_soc_close(&conn->handle), + "gsk_secure_soc_close()", 0); + conn->handle = (gsk_handle) NULL; + } + if(conn->iocport >= 0) + close_async_handshake(conn); +} + + +static ssize_t gskit_send(struct connectdata *conn, int sockindex, + const void *mem, size_t len, CURLcode *curlcode) +{ + struct SessionHandle *data = conn->data; + CURLcode cc; + int written; + + cc = gskit_status(data, + gsk_secure_soc_write(conn->ssl[sockindex].handle, + (char *) mem, (int) len, &written), + "gsk_secure_soc_write()", CURLE_SEND_ERROR); + if(cc != CURLE_OK) { + *curlcode = cc; + written = -1; + } + return (ssize_t) written; /* number of bytes */ +} + + +static ssize_t gskit_recv(struct connectdata *conn, int num, char *buf, + size_t buffersize, CURLcode *curlcode) +{ + struct SessionHandle *data = conn->data; + int buffsize; + int nread; + CURLcode cc; + + buffsize = buffersize > (size_t) INT_MAX? INT_MAX: (int) buffersize; + cc = gskit_status(data, gsk_secure_soc_read(conn->ssl[num].handle, + buf, buffsize, &nread), + "gsk_secure_soc_read()", CURLE_RECV_ERROR); + if(cc != CURLE_OK) { + *curlcode = cc; + nread = -1; + } + return (ssize_t) nread; +} + + +static CURLcode gskit_connect_step1(struct connectdata *conn, int sockindex) +{ + struct SessionHandle *data = conn->data; + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + gsk_handle envir; + CURLcode cc; + int rc; + char *keyringfile; + char *keyringpwd; + char *keyringlabel; + char *sni; + unsigned int protoflags; + long timeout; + Qso_OverlappedIO_t commarea; + + /* Create SSL environment, start (preferably asynchronous) handshake. */ + + connssl->handle = (gsk_handle) NULL; + connssl->iocport = -1; + + /* 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. + */ + + keyringfile = data->set.str[STRING_SSL_CAFILE]; + keyringpwd = data->set.str[STRING_KEY_PASSWD]; + keyringlabel = data->set.str[STRING_CERT]; + 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. */ + cc = init_environment(data, &envir, (const char *) NULL, + keyringfile, keyringlabel, keyringpwd); + if(cc != CURLE_OK) + return cc; + } + + /* Create secure session. */ + cc = gskit_status(data, gsk_secure_soc_open(envir, &connssl->handle), + "gsk_secure_soc_open()", CURLE_SSL_CONNECT_ERROR); + gsk_environment_close(&envir); + if(cc != CURLE_OK) + return cc; + + /* Determine which SSL/TLS version should be enabled. */ + protoflags = CURL_GSKPROTO_SSLV3_MASK | CURL_GSKPROTO_TLSV10_MASK | + CURL_GSKPROTO_TLSV11_MASK | CURL_GSKPROTO_TLSV12_MASK; + sni = conn->host.name; + switch (data->set.ssl.version) { + case CURL_SSLVERSION_SSLv2: + protoflags = CURL_GSKPROTO_SSLV2_MASK; + sni = (char *) NULL; + break; + case CURL_SSLVERSION_SSLv3: + protoflags = CURL_GSKPROTO_SSLV2_MASK; + sni = (char *) NULL; + break; + case CURL_SSLVERSION_TLSv1: + protoflags = CURL_GSKPROTO_TLSV10_MASK | + CURL_GSKPROTO_TLSV11_MASK | CURL_GSKPROTO_TLSV12_MASK; + break; + 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_TLSV12_MASK; + break; + } + + /* Process SNI. Ignore if not supported (on OS400 < V7R1). */ + if(sni) { + cc = set_buffer(data, connssl->handle, + GSK_SSL_EXTN_SERVERNAME_REQUEST, sni, TRUE); + if(cc == CURLE_UNSUPPORTED_PROTOCOL) + cc = CURLE_OK; + } + + /* Set session parameters. */ + if(cc == CURLE_OK) { + /* Compute the handshake timeout. Since GSKit granularity is 1 second, + we round up the required value. */ + timeout = Curl_timeleft(data, NULL, TRUE); + if(timeout < 0) + cc = CURLE_OPERATION_TIMEDOUT; + else + cc = set_numeric(data, connssl->handle, GSK_HANDSHAKE_TIMEOUT, + (timeout + 999) / 1000); + } + if(cc == CURLE_OK) + cc = set_numeric(data, connssl->handle, GSK_FD, conn->sock[sockindex]); + if(cc == CURLE_OK) + cc = set_ciphers(data, connssl->handle, &protoflags); + if(!protoflags) { + failf(data, "No SSL protocol/cipher combination enabled"); + cc = CURLE_SSL_CIPHER; + } + if(cc == CURLE_OK) + cc = set_enum(data, connssl->handle, GSK_PROTOCOL_SSLV2, + (protoflags & CURL_GSKPROTO_SSLV2_MASK)? + GSK_PROTOCOL_SSLV2_ON: GSK_PROTOCOL_SSLV2_OFF, FALSE); + if(cc == CURLE_OK) + cc = set_enum(data, connssl->handle, GSK_PROTOCOL_SSLV3, + (protoflags & CURL_GSKPROTO_SSLV3_MASK)? + GSK_PROTOCOL_SSLV3_ON: GSK_PROTOCOL_SSLV3_OFF, FALSE); + if(cc == CURLE_OK) + cc = set_enum(data, connssl->handle, GSK_PROTOCOL_TLSV1, + (protoflags & CURL_GSKPROTO_TLSV10_MASK)? + GSK_PROTOCOL_TLSV1_ON: GSK_PROTOCOL_TLSV1_OFF, FALSE); + if(cc == CURLE_OK) { + cc = set_enum(data, connssl->handle, GSK_PROTOCOL_TLSV11, + (protoflags & CURL_GSKPROTO_TLSV11_MASK)? + GSK_TRUE: GSK_FALSE, TRUE); + if(cc == CURLE_UNSUPPORTED_PROTOCOL) { + cc = CURLE_OK; + if(protoflags == CURL_GSKPROTO_TLSV11_MASK) { + failf(data, "TLS 1.1 not yet supported"); + cc = CURLE_SSL_CIPHER; + } + } + } + if(cc == CURLE_OK) { + cc = set_enum(data, connssl->handle, GSK_PROTOCOL_TLSV12, + (protoflags & CURL_GSKPROTO_TLSV12_MASK)? + GSK_TRUE: GSK_FALSE, TRUE); + if(cc == CURLE_UNSUPPORTED_PROTOCOL) { + cc = CURLE_OK; + if(protoflags == CURL_GSKPROTO_TLSV12_MASK) { + failf(data, "TLS 1.2 not yet supported"); + cc = CURLE_SSL_CIPHER; + } + } + } + if(cc == CURLE_OK) + cc = set_enum(data, connssl->handle, GSK_SERVER_AUTH_TYPE, + data->set.ssl.verifypeer? GSK_SERVER_AUTH_FULL: + GSK_SERVER_AUTH_PASSTHRU, FALSE); + + if(cc == CURLE_OK) { + /* Start handshake. Try asynchronous first. */ + memset(&commarea, 0, sizeof commarea); + connssl->iocport = QsoCreateIOCompletionPort(); + if(connssl->iocport != -1) { + cc = gskit_status(data, gsk_secure_soc_startInit(connssl->handle, + connssl->iocport, &commarea), + "gsk_secure_soc_startInit()", CURLE_SSL_CONNECT_ERROR); + if(cc == CURLE_OK) { + connssl->connecting_state = ssl_connect_2; + return CURLE_OK; + } + else + close_async_handshake(connssl); + } + else if(errno != ENOBUFS) + cc = gskit_status(data, GSK_ERROR_IO, "QsoCreateIOCompletionPort()", 0); + else { + /* No more completion port available. Use synchronous IO. */ + cc = gskit_status(data, gsk_secure_soc_init(connssl->handle), + "gsk_secure_soc_init()", CURLE_SSL_CONNECT_ERROR); + if(cc == CURLE_OK) { + connssl->connecting_state = ssl_connect_3; + return CURLE_OK; + } + } + } + + /* Error: rollback. */ + close_one(connssl, data); + return cc; +} + + +static CURLcode gskit_connect_step2(struct connectdata *conn, int sockindex, + bool nonblocking) +{ + struct SessionHandle *data = conn->data; + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + Qso_OverlappedIO_t cstat; + long timeout_ms; + struct timeval stmv; + CURLcode cc; + + /* Poll or wait for end of SSL asynchronous handshake. */ + + for(;;) { + 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(connssl->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; + } + cc = gskit_status(data, cstat.returnValue, "SSL handshake", + CURLE_SSL_CONNECT_ERROR); + if(cc == CURLE_OK) + connssl->connecting_state = ssl_connect_3; + close_async_handshake(connssl); + return cc; +} + + +static CURLcode gskit_connect_step3(struct connectdata *conn, int sockindex) +{ + struct SessionHandle *data = conn->data; + 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; + int i; + CURLcode cc; + + /* SSL handshake done: gather certificate info and verify host. */ + + if(gskit_status(data, gsk_attribute_get_cert_info(connssl->handle, + GSK_PARTNER_CERT_INFO, + &cdev, &cdec), + "gsk_attribute_get_cert_info()", CURLE_SSL_CONNECT_ERROR) == + CURLE_OK) { + infof(data, "Server certificate:\n"); + p = cdev; + for(i = 0; i++ < cdec; p++) + switch (p->cert_data_id) { + case CERT_BODY_DER: + cert = p->cert_data_p; + certend = cert + cdev->cert_data_l; + break; + case CERT_DN_PRINTABLE: + infof(data, "\t subject: %.*s\n", p->cert_data_l, p->cert_data_p); + break; + case CERT_ISSUER_DN_PRINTABLE: + infof(data, "\t issuer: %.*s\n", p->cert_data_l, p->cert_data_p); + break; + case CERT_VALID_FROM: + infof(data, "\t start date: %.*s\n", p->cert_data_l, p->cert_data_p); + break; + case CERT_VALID_TO: + infof(data, "\t expire date: %.*s\n", p->cert_data_l, p->cert_data_p); + break; + } + } + + /* Verify host. */ + cc = Curl_verifyhost(conn, cert, certend); + if(cc != CURLE_OK) + return cc; + + /* The only place GSKit can get the whole CA chain is a validation + callback where no user data pointer is available. Therefore it's not + possible to copy this chain into our structures for CAINFO. + However the server certificate may be available, thus we can return + info about it. */ + if(data->set.ssl.certinfo) { + if(Curl_ssl_init_certinfo(data, 1)) + return CURLE_OUT_OF_MEMORY; + if(cert) { + cc = Curl_extract_certinfo(conn, 0, cert, certend); + if(cc != CURLE_OK) + return cc; + } + } + + connssl->connecting_state = ssl_connect_done; + return CURLE_OK; +} + + +static CURLcode gskit_connect_common(struct connectdata *conn, int sockindex, + bool nonblocking, bool *done) +{ + struct SessionHandle *data = conn->data; + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + long timeout_ms; + Qso_OverlappedIO_t cstat; + CURLcode cc = CURLE_OK; + + *done = connssl->state == ssl_connection_complete; + if(*done) + return CURLE_OK; + + /* Step 1: create session, start handshake. */ + if(connssl->connecting_state == ssl_connect_1) { + /* check allowed time left */ + timeout_ms = Curl_timeleft(data, NULL, TRUE); + + if(timeout_ms < 0) { + /* no need to continue if time already is up */ + failf(data, "SSL connection timeout"); + cc = CURLE_OPERATION_TIMEDOUT; + } + else + cc = gskit_connect_step1(conn, sockindex); + } + + /* Step 2: check if handshake is over. */ + if(cc == CURLE_OK && connssl->connecting_state == ssl_connect_2) { + /* check allowed time left */ + timeout_ms = Curl_timeleft(data, NULL, TRUE); + + if(timeout_ms < 0) { + /* no need to continue if time already is up */ + failf(data, "SSL connection timeout"); + cc = CURLE_OPERATION_TIMEDOUT; + } + else + cc = gskit_connect_step2(conn, sockindex, nonblocking); + } + + /* Step 3: gather certificate info, verify host. */ + if(cc == CURLE_OK && connssl->connecting_state == ssl_connect_3) + cc = gskit_connect_step3(conn, sockindex); + + if(cc != CURLE_OK) + close_one(connssl, data); + else if(connssl->connecting_state == ssl_connect_done) { + connssl->state = ssl_connection_complete; + connssl->connecting_state = ssl_connect_1; + conn->recv[sockindex] = gskit_recv; + conn->send[sockindex] = gskit_send; + *done = TRUE; + } + + return cc; +} + + +CURLcode Curl_gskit_connect_nonblocking(struct connectdata *conn, + int sockindex, + bool *done) +{ + CURLcode cc; + + cc = gskit_connect_common(conn, sockindex, TRUE, done); + if(*done || cc != CURLE_OK) + conn->ssl[sockindex].connecting_state = ssl_connect_1; + return cc; +} + + +CURLcode Curl_gskit_connect(struct connectdata *conn, int sockindex) +{ + CURLcode retcode; + bool done; + + conn->ssl[sockindex].connecting_state = ssl_connect_1; + retcode = gskit_connect_common(conn, sockindex, FALSE, &done); + if(retcode) + return retcode; + + DEBUGASSERT(done); + + return CURLE_OK; +} + + +void Curl_gskit_close(struct connectdata *conn, int sockindex) +{ + struct SessionHandle *data = conn->data; + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + + if(connssl->use) + close_one(connssl, data); +} + + +int Curl_gskit_close_all(struct SessionHandle *data) +{ + /* Unimplemented. */ + (void) data; + return 0; +} + + +int Curl_gskit_shutdown(struct connectdata *conn, int sockindex) +{ + struct ssl_connect_data *connssl = &conn->ssl[sockindex]; + struct SessionHandle *data = conn->data; + ssize_t nread; + int what; + int rc; + char buf[120]; + + if(!connssl->handle) + return 0; + + if(data->set.ftp_ccc != CURLFTPSSL_CCC_ACTIVE) + return 0; + + close_one(connssl, data); + rc = 0; + what = Curl_socket_ready(conn->sock[sockindex], + CURL_SOCKET_BAD, SSL_SHUTDOWN_TIMEOUT); + + for(;;) { + if(what < 0) { + /* anything that gets here is fatally bad */ + failf(data, "select/poll on SSL socket, errno: %d", SOCKERRNO); + rc = -1; + break; + } + + if(!what) { /* timeout */ + failf(data, "SSL shutdown timeout"); + break; + } + + /* Something to read, let's do it and hope that it is the close + notify alert from the server. No way to gsk_secure_soc_read() now, so + use read(). */ + + nread = read(conn->sock[sockindex], buf, sizeof(buf)); + + if(nread < 0) { + failf(data, "read: %s", strerror(errno)); + rc = -1; + } + + if(nread <= 0) + break; + + what = Curl_socket_ready(conn->sock[sockindex], CURL_SOCKET_BAD, 0); + } + + return rc; +} + + +size_t Curl_gskit_version(char *buffer, size_t size) +{ + strncpy(buffer, "GSKit", size); + return strlen(buffer); +} + + +int Curl_gskit_check_cxn(struct connectdata *cxn) +{ + int err; + int errlen; + + /* The only thing that can be tested here is at the socket level. */ + + if(!cxn->ssl[FIRSTSOCKET].handle) + return 0; /* connection has been closed */ + + err = 0; + errlen = sizeof err; + + if(getsockopt(cxn->sock[FIRSTSOCKET], SOL_SOCKET, SO_ERROR, + (unsigned char *) &err, &errlen) || + errlen != sizeof err || err) + return 0; /* connection has been closed */ + + return -1; /* connection status unknown */ +} + +#endif /* USE_GSKIT */ |