+++ /dev/null
-/* tls.c --- TLSv1 functions
- Copyright (C) 2000 Kenichi Okada <okada@opaopa.org>
-
- Author: Kenichi Okada <okada@opaopa.org>
- Created: 2000-02-22
-
- Keywords: TLS, OpenSSL
-
- Commentary:
-
- [RFC 2246] "The TLS Protocol Version 1.0"
- by Christopher Allen <callen@certicom.com> and
- Tim Dierks <tdierks@certicom.com> (1999/01)
-
- [RFC 2595] "Using TLS with IMAP, POP3 and ACAP"
- by Chris Newman <chris.newman@innosoft.com> (1999/06)
-
-*/
-
-#include <sys/types.h>
-#include "config.h"
-#include "nnrpd.h"
-
-#ifdef HAVE_SSL
-
-/* System library. */
-
-#include <unistd.h>
-#include <stdio.h>
-#include <string.h>
-#include <syslog.h>
-#include <sys/stat.h>
-#include <sys/uio.h>
-
-#endif
-
-/* outside the ifdef so `make depend` works even ifndef HAVE_SSL */
-#include "tls.h"
-#include "sasl_config.h"
-
-#ifdef HAVE_SSL
-
-/* We must keep some of the info available */
-static const char hexcodes[] = "0123456789ABCDEF";
-
-static bool tls_initialized = false;
-
-static int verify_depth;
-static int verify_error = X509_V_OK;
-static int do_dump = 0;
-static SSL_CTX *CTX = NULL;
-SSL *tls_conn = NULL;
-
-#define CCERT_BUFSIZ 256
-
-int tls_serverengine = 0;
-int tls_serveractive = 0; /* available or not */
-char *tls_peer_subject = NULL;
-char *tls_peer_issuer = NULL;
-char *tls_peer_fingerprint = NULL;
-
-int tls_clientactive = 0; /* available or not */
-char *tls_peer_CN = NULL;
-char *tls_issuer_CN = NULL;
-
-const char *tls_protocol = NULL;
-const char *tls_cipher_name = NULL;
-int tls_cipher_usebits = 0;
-int tls_cipher_algbits = 0;
-
-
-int tls_loglevel = 0;
-
-
-/* taken from OpenSSL apps/s_cb.c
- * tim - this seems to just be giving logging messages
- */
-
-static void apps_ssl_info_callback(SSL * s, int where, int ret)
-{
- const char *str;
- int w;
-
- if (tls_loglevel==0) return;
-
- w = where & ~SSL_ST_MASK;
-
- if (w & SSL_ST_CONNECT)
- str = "SSL_connect";
- else if (w & SSL_ST_ACCEPT)
- str = "SSL_accept";
- else
- str = "undefined";
-
- if (where & SSL_CB_LOOP) {
- if (tls_serverengine && (tls_loglevel >= 2))
- Printf("%s:%s", str, SSL_state_string_long(s));
- } else if (where & SSL_CB_ALERT) {
- str = (where & SSL_CB_READ) ? "read" : "write";
- if ((tls_serverengine && (tls_loglevel >= 2)) ||
- ((ret & 0xff) != SSL3_AD_CLOSE_NOTIFY))
- Printf("SSL3 alert %s:%s:%s", str,
- SSL_alert_type_string_long(ret),
- SSL_alert_desc_string_long(ret));
- } else if (where & SSL_CB_EXIT) {
- if (ret == 0)
- Printf("%s:failed in %s",
- str, SSL_state_string_long(s));
- else if (ret < 0) {
- Printf("%s:error in %s",
- str, SSL_state_string_long(s));
- }
- }
-}
-
-
-/*
- * Hardcoded DH parameter files, from OpenSSL.
- * For information on how these files were generated, see
- * "Assigned Number for SKIP Protocols"
- * (http://www.skip-vpn.org/spec/numbers.html.
- */
-static const char file_dh512[] =
-"-----BEGIN DH PARAMETERS-----\n\
-MEYCQQD1Kv884bEpQBgRjXyEpwpy1obEAxnIByl6ypUM2Zafq9AKUJsCRtMIPWak\n\
-XUGfnHy9iUsiGSa6q6Jew1XpKgVfAgEC\n\
------END DH PARAMETERS-----\n";
-
-static const char file_dh1024[] =
-"-----BEGIN DH PARAMETERS-----\n\
-MIGHAoGBAPSI/VhOSdvNILSd5JEHNmszbDgNRR0PfIizHHxbLY7288kjwEPwpVsY\n\
-jY67VYy4XTjTNP18F1dDox0YbN4zISy1Kv884bEpQBgRjXyEpwpy1obEAxnIByl6\n\
-ypUM2Zafq9AKUJsCRtMIPWakXUGfnHy9iUsiGSa6q6Jew1XpL3jHAgEC\n\
------END DH PARAMETERS-----\n";
-
-static const char file_dh2048[] =
-"-----BEGIN DH PARAMETERS-----\n\
-MIIBCAKCAQEA9kJXtwh/CBdyorrWqULzBej5UxE5T7bxbrlLOCDaAadWoxTpj0BV\n\
-89AHxstDqZSt90xkhkn4DIO9ZekX1KHTUPj1WV/cdlJPPT2N286Z4VeSWc39uK50\n\
-T8X8dryDxUcwYc58yWb/Ffm7/ZFexwGq01uejaClcjrUGvC/RgBYK+X0iP1YTknb\n\
-zSC0neSRBzZrM2w4DUUdD3yIsxx8Wy2O9vPJI8BD8KVbGI2Ou1WMuF040zT9fBdX\n\
-Q6MdGGzeMyEstSr/POGxKUAYEY18hKcKctaGxAMZyAcpesqVDNmWn6vQClCbAkbT\n\
-CD1mpF1Bn5x8vYlLIhkmuquiXsNV6TILOwIBAg==\n\
------END DH PARAMETERS-----\n";
-
-static const char file_dh4096[] =
-"-----BEGIN DH PARAMETERS-----\n\
-MIICCAKCAgEA+hRyUsFN4VpJ1O8JLcCo/VWr19k3BCgJ4uk+d+KhehjdRqNDNyOQ\n\
-l/MOyQNQfWXPeGKmOmIig6Ev/nm6Nf9Z2B1h3R4hExf+zTiHnvVPeRBhjdQi81rt\n\
-Xeoh6TNrSBIKIHfUJWBh3va0TxxjQIs6IZOLeVNRLMqzeylWqMf49HsIXqbcokUS\n\
-Vt1BkvLdW48j8PPv5DsKRN3tloTxqDJGo9tKvj1Fuk74A+Xda1kNhB7KFlqMyN98\n\
-VETEJ6c7KpfOo30mnK30wqw3S8OtaIR/maYX72tGOno2ehFDkq3pnPtEbD2CScxc\n\
-alJC+EL7RPk5c/tgeTvCngvc1KZn92Y//EI7G9tPZtylj2b56sHtMftIoYJ9+ODM\n\
-sccD5Piz/rejE3Ome8EOOceUSCYAhXn8b3qvxVI1ddd1pED6FHRhFvLrZxFvBEM9\n\
-ERRMp5QqOaHJkM+Dxv8Cj6MqrCbfC4u+ZErxodzuusgDgvZiLF22uxMZbobFWyte\n\
-OvOzKGtwcTqO/1wV5gKkzu1ZVswVUQd5Gg8lJicwqRWyyNRczDDoG9jVDxmogKTH\n\
-AaqLulO7R8Ifa1SwF2DteSGVtgWEN8gDpN3RBmmPTDngyF2DHb5qmpnznwtFKdTL\n\
-KWbuHn491xNO25CQWMtem80uKw+pTnisBRF/454n1Jnhub144YRBoN8CAQI=\n\
------END DH PARAMETERS-----\n";
-
-/*
- * Load hardcoded DH parameters.
- */
-static DH *
-load_dh_buffer (const char *buffer, size_t len)
-{
- BIO *bio;
- DH *dh = NULL;
-
- bio = BIO_new_mem_buf((char *) buffer, len);
- if (bio == NULL)
- return NULL;
- dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
-/* if (dh == NULL) log error */
- BIO_free(bio);
-
- return dh;
-}
-
-/*
- * Generate empheral DH key. Because this can take a long
- * time to compute, we use precomputed parameters of the
- * common key sizes.
- *
- * These values can be static (once loaded or computed) since
- * the OpenSSL library can effectively generate random keys
- * from the information provided.
- *
- * EDH keying is slightly less efficient than static RSA keying,
- * but it offers Perfect Forward Secrecy (PFS).
- *
- * FIXME: support user-specified files, to eliminate risk of
- * "small group" attacks.
- */
-static DH *tmp_dh_cb(SSL *s UNUSED, int export UNUSED, int keylength)
-{
- DH *r = NULL;
- static DH *dh = NULL;
- static DH *dh512 = NULL;
- static DH *dh1024 = NULL;
- static DH *dh2048 = NULL;
- static DH *dh4096 = NULL;
-
- switch (keylength)
- {
- case 512:
- if (dh512 == NULL)
- dh512 = load_dh_buffer(file_dh512, sizeof file_dh512);
- r = dh512;
- break;
- case 1024:
- if (dh1024 == NULL)
- dh1024 = load_dh_buffer(file_dh1024, sizeof file_dh1024);
- r = dh1024;
- break;
- case 2048:
- if (dh2048 == NULL)
- dh2048 = load_dh_buffer(file_dh2048, sizeof file_dh2048);
- r = dh2048;
- break;
- case 4096:
- if (dh4096 == NULL)
- dh4096 = load_dh_buffer(file_dh4096, sizeof file_dh4096);
- r = dh4096;
- break;
- default:
- /* we should check current keylength vs. requested keylength */
- /* also, this is an extremely expensive operation! */
- dh = DH_generate_parameters(keylength, DH_GENERATOR_2, NULL, NULL);
- r = dh;
- }
-
- return r;
-}
-
-/* taken from OpenSSL apps/s_cb.c */
-
-static int verify_callback(int ok, X509_STORE_CTX * ctx)
-{
- char buf[256];
- X509 *err_cert;
- int err;
- int depth;
-
- syslog(L_NOTICE,"Doing a peer verify");
-
- err_cert = X509_STORE_CTX_get_current_cert(ctx);
- err = X509_STORE_CTX_get_error(ctx);
- depth = X509_STORE_CTX_get_error_depth(ctx);
-
- X509_NAME_oneline(X509_get_subject_name(err_cert), buf, 256);
- if ((tls_serveractive) && (tls_loglevel >= 1))
- Printf("Peer cert verify depth=%d %s", depth, buf);
- if (ok==0)
- {
- syslog(L_NOTICE, "verify error:num=%d:%s", err,
- X509_verify_cert_error_string(err));
-
- if (verify_depth >= depth) {
- ok = 1;
- verify_error = X509_V_OK;
- } else {
- ok = 0;
- verify_error = X509_V_ERR_CERT_CHAIN_TOO_LONG;
- }
- }
- switch (ctx->error) {
- case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
- X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert), buf, 256);
- syslog(L_NOTICE, "issuer= %s", buf);
- break;
- case X509_V_ERR_CERT_NOT_YET_VALID:
- case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
- syslog(L_NOTICE, "cert not yet valid");
- break;
- case X509_V_ERR_CERT_HAS_EXPIRED:
- case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
- syslog(L_NOTICE, "cert has expired");
- break;
- }
- if ((tls_serveractive) && (tls_loglevel >= 1))
- Printf("verify return:%d", ok);
-
- return (ok);
-}
-
-
-/*
- * taken from OpenSSL crypto/bio/b_dump.c, modified to save a lot of strcpy
- * and strcat by Matti Aarnio.
- */
-
-#define TRUNCATE
-#define DUMP_WIDTH 16
-
-static int tls_dump(const char *s, int len)
-{
- int ret = 0;
- char buf[160 + 1];
- char *ss;
- int i;
- int j;
- int rows;
- int trunc;
- unsigned char ch;
-
- trunc = 0;
-
-
-#ifdef TRUNCATE
- for (; (len > 0) && ((s[len - 1] == ' ') || (s[len - 1] == '\0')); len--)
- trunc++;
-#endif
-
- rows = (len / DUMP_WIDTH);
- if ((rows * DUMP_WIDTH) < len)
- rows++;
-
- for (i = 0; i < rows; i++) {
- buf[0] = '\0'; /* start with empty string */
- ss = buf;
-
- sprintf(ss, "%04x ", i * DUMP_WIDTH);
- ss += strlen(ss);
- for (j = 0; j < DUMP_WIDTH; j++) {
- if (((i * DUMP_WIDTH) + j) >= len) {
- strcpy(ss, " ");
- } else {
- ch = ((unsigned char) *((const char *)(s) + i * DUMP_WIDTH + j))
- & 0xff;
- sprintf(ss, "%02x%c", ch, j == 7 ? '|' : ' ');
- ss += 3;
- }
- }
- ss += strlen(ss);
- *ss+= ' ';
- for (j = 0; j < DUMP_WIDTH; j++) {
- if (((i * DUMP_WIDTH) + j) >= len)
- break;
- ch = ((unsigned char) *((const char *)(s) + i * DUMP_WIDTH + j))
- & 0xff;
- *ss+= (((ch >= ' ') && (ch <= '~')) ? ch : '.');
- if (j == 7) *ss+= ' ';
- }
- *ss = 0;
- /*
- * if this is the last call then update the ddt_dump thing so that
- * we will move the selection point in the debug window
- */
- if (tls_loglevel>0)
- Printf("%s", buf);
- ret += strlen(buf);
- }
-#ifdef TRUNCATE
- if (trunc > 0) {
- snprintf(buf, sizeof(buf), "%04x - <SPACES/NULS>\n", len+ trunc);
- if (tls_loglevel>0)
- Printf("%s", buf);
- ret += strlen(buf);
- }
-#endif
- return (ret);
-}
-
- /*
- * Set up the cert things on the server side. We do need both the
- * private key (in key_file) and the cert (in cert_file).
- * Both files may be identical.
- *
- * This function is taken from OpenSSL apps/s_cb.c
- */
-
-static int set_cert_stuff(SSL_CTX * ctx, char *cert_file, char *key_file)
-{
- struct stat buf;
-
- if (cert_file != NULL) {
- if (SSL_CTX_use_certificate_file(ctx, cert_file,
- SSL_FILETYPE_PEM) <= 0) {
- syslog(L_ERROR, "unable to get certificate from '%s'", cert_file);
- return (0);
- }
- if (key_file == NULL)
- key_file = cert_file;
-
- /* check ownership and permissions of key file */
- if (lstat(key_file, &buf) == -1) {
- syslog(L_ERROR, "unable to stat private key '%s'", key_file);
- return (0);
- }
- if (!S_ISREG(buf.st_mode) || (buf.st_mode & 0077) != 0 ||
- buf.st_uid != getuid()) {
- syslog(L_ERROR, "bad ownership or permissions on private key"
- " '%s': private key must be mode 600 and owned by "
- NEWSUSER, cert_file);
- return (0);
- }
-
- if (SSL_CTX_use_PrivateKey_file(ctx, key_file,
- SSL_FILETYPE_PEM) <= 0) {
- syslog(L_ERROR, "unable to get private key from '%s'", key_file);
- return (0);
- }
- /* Now we know that a key and cert have been set against
- * the SSL context */
- if (!SSL_CTX_check_private_key(ctx)) {
- syslog(L_ERROR, "Private key does not match the certificate public key");
- return (0);
- }
- }
- return (1);
-}
-
-
-
- /*
- * This is the setup routine for the SSL server. As smtpd might be called
- * more than once, we only want to do the initialization one time.
- *
- * The skeleton of this function is taken from OpenSSL apps/s_server.c.
-
- * returns -1 on error
- */
-
-int tls_init_serverengine(int verifydepth,
- int askcert,
- int requirecert,
- char *tls_CAfile,
- char *tls_CApath,
- char *tls_cert_file,
- char *tls_key_file
- )
-{
- int off = 0;
- int verify_flags = SSL_VERIFY_NONE;
- char *CApath;
- char *CAfile;
- char *s_cert_file;
- char *s_key_file;
- struct stat buf;
-
- if (tls_serverengine)
- return (0); /* already running */
-
- if (tls_loglevel >= 2)
- Printf("starting TLS engine");
-
- SSL_load_error_strings();
- SSLeay_add_ssl_algorithms();
-
- CTX = SSL_CTX_new(SSLv23_server_method());
- if (CTX == NULL) {
- return (-1);
- };
-
- off |= SSL_OP_ALL; /* Work around all known bugs */
- SSL_CTX_set_options(CTX, off);
- SSL_CTX_set_info_callback(CTX, apps_ssl_info_callback);
- SSL_CTX_sess_set_cache_size(CTX, 128);
-
- if (strlen(tls_CAfile) == 0)
- CAfile = NULL;
- else
- CAfile = tls_CAfile;
- if (strlen(tls_CApath) == 0)
- CApath = NULL;
- else
- CApath = tls_CApath;
-
- if ((!SSL_CTX_load_verify_locations(CTX, CAfile, CApath)) ||
- (!SSL_CTX_set_default_verify_paths(CTX))) {
- if (tls_loglevel >= 2)
- Printf("TLS engine: cannot load CA data\n");
- return (-1);
- }
-
- if (strlen(tls_cert_file) == 0)
- s_cert_file = NULL;
- else
- s_cert_file = tls_cert_file;
- if (strlen(tls_key_file) == 0)
- s_key_file = NULL;
- else
- s_key_file = tls_key_file;
-
- if (!set_cert_stuff(CTX, s_cert_file, s_key_file)) {
- if (tls_loglevel >= 2)
- Printf("TLS engine: cannot load cert/key data\n");
- return (-1);
- }
-
- /* load some randomization data from /dev/urandom, if it exists */
- /* FIXME: should also check for ".rand" file, update it on exit */
- if (stat("/dev/urandom", &buf) == 0)
- RAND_load_file("/dev/urandom", 16 * 1024);
-
- SSL_CTX_set_tmp_dh_callback(CTX, tmp_dh_cb);
- SSL_CTX_set_options(CTX, SSL_OP_SINGLE_DH_USE);
-
- verify_depth = verifydepth;
- if (askcert!=0)
- verify_flags |= SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE;
- if (requirecert)
- verify_flags |= SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT
- | SSL_VERIFY_CLIENT_ONCE;
- SSL_CTX_set_verify(CTX, verify_flags, verify_callback);
-
- SSL_CTX_set_client_CA_list(CTX, SSL_load_client_CA_file(CAfile));
-
- tls_serverengine = 1;
- return (0);
-}
-
-
-/*
-** The function called by nnrpd to initialize the TLS support. Calls
-** tls_init_server_engine and checks the result. On any sort of failure,
-** nnrpd will exit.
-*/
-void
-tls_init(void)
-{
- int ssl_result;
-
- if (tls_initialized)
- return;
- sasl_config_read();
- ssl_result = tls_init_serverengine(5, /* depth to verify */
- 0, /* can client auth? */
- 0, /* required client to auth? */
- (char *)sasl_config_getstring("tls_ca_file", ""),
- (char *)sasl_config_getstring("tls_ca_path", ""),
- (char *)sasl_config_getstring("tls_cert_file", ""),
- (char *)sasl_config_getstring("tls_key_file", ""));
- if (ssl_result == -1) {
- Reply("%d Error initializing TLS\r\n", NNTP_STARTTLS_BAD_VAL);
- syslog(L_ERROR, "error initializing TLS: "
- "[CA_file: %s] [CA_path: %s] [cert_file: %s] [key_file: %s]",
- sasl_config_getstring("tls_ca_file", ""),
- sasl_config_getstring("tls_ca_path", ""),
- sasl_config_getstring("tls_cert_file", ""),
- sasl_config_getstring("tls_key_file", ""));
- ExitWithStats(1, false);
- }
- tls_initialized = true;
-}
-
-
-/* taken from OpenSSL apps/s_cb.c */
-
-static long bio_dump_cb(BIO * bio, int cmd, const char *argp, int argi,
- long argl UNUSED, long ret)
-{
- if (!do_dump)
- return (ret);
-
- if (cmd == (BIO_CB_READ | BIO_CB_RETURN)) {
- Printf("read from %08X [%08lX] (%d bytes => %ld (0x%X))", (unsigned int) bio, (long unsigned int) argp,
- argi, ret, (unsigned int) ret);
- tls_dump(argp, (int) ret);
- return (ret);
- } else if (cmd == (BIO_CB_WRITE | BIO_CB_RETURN)) {
- Printf("write to %08X [%08lX] (%d bytes => %ld (0x%X))", (unsigned int) bio, (long unsigned int)argp,
- argi, ret, (unsigned int) ret);
- tls_dump(argp, (int) ret);
- }
- return (ret);
-}
-
- /*
- * This is the actual startup routine for the connection. We expect
- * that the buffers are flushed and the "220 Ready to start TLS" was
- * send to the client, so that we can immediately can start the TLS
- * handshake process.
- *
- * layerbits and authid are filled in on sucess. authid is only
- * filled in if the client authenticated
- *
- */
-int tls_start_servertls(int readfd, int writefd)
-{
- int sts;
- int keepalive;
- SSL_SESSION *session;
- SSL_CIPHER *cipher;
-
- if (!tls_serverengine)
- {
- /* should never happen */
- syslog(L_ERROR, "tls_engine not running");
- return (-1);
- }
- if (tls_loglevel >= 1)
- Printf("setting up TLS connection");
-
- if (tls_conn == NULL)
- {
- tls_conn = (SSL *) SSL_new(CTX);
- }
- if (tls_conn == NULL)
- {
- return (-1);
- }
- SSL_clear(tls_conn);
-
-#if defined(SOL_SOCKET) && defined(SO_KEEPALIVE)
- /* Set KEEPALIVE to catch broken socket connections. */
- keepalive = 1;
- if (setsockopt(readfd, SOL_SOCKET, SO_KEEPALIVE, &keepalive, sizeof(keepalive)) < 0)
- syslog(L_ERROR, "fd %d can't setsockopt(KEEPALIVE) %m", readfd);
- if (setsockopt(writefd, SOL_SOCKET, SO_KEEPALIVE, &keepalive, sizeof(keepalive)) < 0)
- syslog(L_ERROR, "fd %d can't setsockopt(KEEPALIVE) %m", writefd);
-#endif /* SOL_SOCKET && SO_KEEPALIVE */
-
- /* set the file descriptors for SSL to use */
- if (SSL_set_rfd(tls_conn, readfd)==0)
- {
- return (-1);
- }
-
- if (SSL_set_wfd(tls_conn, writefd)==0)
- {
- return (-1);
- }
-
- /*
- * This is the actual handshake routine. It will do all the negotiations
- * and will check the client cert etc.
- */
- SSL_set_accept_state(tls_conn);
-
- /*
- * We do have an SSL_set_fd() and now suddenly a BIO_ routine is called?
- * Well there is a BIO below the SSL routines that is automatically
- * created for us, so we can use it for debugging purposes.
- */
- if (tls_loglevel >= 3)
- BIO_set_callback(SSL_get_rbio(tls_conn), bio_dump_cb);
-
- /* Dump the negotiation for loglevels 3 and 4*/
- if (tls_loglevel >= 3)
- do_dump = 1;
-
- if ((sts = SSL_accept(tls_conn)) <= 0) { /* xxx <= 0 */
- session = SSL_get_session(tls_conn);
-
- if (session) {
- SSL_CTX_remove_session(CTX, session);
- }
- if (tls_conn)
- SSL_free(tls_conn);
- tls_conn = NULL;
- return (-1);
- }
- /* Only loglevel==4 dumps everything */
- if (tls_loglevel < 4)
- do_dump = 0;
-
- tls_protocol = SSL_get_version(tls_conn);
- cipher = SSL_get_current_cipher(tls_conn);
-
- tls_cipher_name = SSL_CIPHER_get_name(cipher);
- tls_cipher_usebits = SSL_CIPHER_get_bits(cipher,
- &tls_cipher_algbits);
- tls_serveractive = 1;
-
- syslog(L_NOTICE, "starttls: %s with cipher %s (%d/%d bits) no authentication", tls_protocol, tls_cipher_name,
- tls_cipher_usebits, tls_cipher_algbits);
-
- return (0);
-}
-
-ssize_t
-SSL_writev (ssl, vector, count)
- SSL *ssl;
- const struct iovec *vector;
- int count;
-{
- static char *buffer = NULL;
- static size_t allocsize = 0;
- char *bp;
- size_t bytes, to_copy;
- int i;
- /* Find the total number of bytes to be written. */
- bytes = 0;
- for (i = 0; i < count; ++i)
- bytes += vector[i].iov_len;
- /* Allocate a buffer to hold the data. */
- if (NULL == buffer) {
- buffer = (char *) xmalloc(bytes);
- allocsize = bytes;
- } else if (bytes > allocsize) {
- buffer = (char *) xrealloc (buffer, bytes);
- allocsize = bytes;
- }
- /* Copy the data into BUFFER. */
- to_copy = bytes;
- bp = buffer;
- for (i = 0; i < count; ++i)
- {
-#define min(a, b) ((a) > (b) ? (b) : (a))
- size_t copy = min (vector[i].iov_len, to_copy);
- memcpy (bp, vector[i].iov_base, copy);
- bp += copy;
- to_copy -= copy;
- if (to_copy == 0)
- break;
- }
- return SSL_write (ssl, buffer, bytes);
-}
-
-
-#endif /* HAVE_SSL */
~ian / innduct.git / blobdiff