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#include <stdio.h>
#include "ssl_locl.h"
#include <openssl/buffer.h>
#include <openssl/rand.h>
#include <openssl/objects.h>
#include <openssl/evp.h>
//#define DEBUG
// They need to be global here to work
/* Matteo -- START */
struct timeval currTime; // keep current time
struct timeval prevTime; // keep previous time (to compute time passed)
struct timeval originTime; // keep previous time (to compute time passed)
/* Matteo -- END*/
static const SSL_METHOD *spp_get_proxy_method(int ver);
static const SSL_METHOD *spp_get_proxy_method(int ver)
{
if (ver == SPP_VERSION)
return SPP_proxy_method();
return NULL;
}
IMPLEMENT_spp_meth_func(SPP_VERSION, SPP_proxy_method,
spp_proxy_accept,
spp_proxy_connect,
spp_get_proxy_method)
int spp_proxy_connect(SSL *s) {
BUF_MEM *buf=NULL;
unsigned long Time=(unsigned long)time(NULL);
void (*cb)(const SSL *ssl,int type,int val)=NULL;
int ret= -1;
RAND_add(&Time,sizeof(Time),0);
ERR_clear_error();
clear_sys_error();
if (s->info_callback != NULL)
cb=s->info_callback;
else if (s->ctx->info_callback != NULL)
cb=s->ctx->info_callback;
s->in_handshake++;
if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
#ifndef OPENSSL_NO_HEARTBEATS
/* If we're awaiting a HeartbeatResponse, pretend we
* already got and don't await it anymore, because
* Heartbeats don't make sense during handshakes anyway.
*/
if (s->tlsext_hb_pending) {
s->tlsext_hb_pending = 0;
s->tlsext_hb_seq++;
}
#endif
for (;;) {
switch(s->state) {
case SSL_ST_RENEGOTIATE:
SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
ret = -1;
goto end;
case SSL_ST_BEFORE:
case SSL_ST_CONNECT:
case SSL_ST_BEFORE|SSL_ST_CONNECT:
case SSL_ST_OK|SSL_ST_CONNECT:
#ifdef DEBUG
log_time("Connecting next session\n", &currTime, &prevTime, &originTime);
#endif
s->server=0; /* We are a proxy */
s->proxy=1;
if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
if ((s->version & 0xff00 ) != 0x0600) { /* SPP major version is 6 */
SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
ret = -1;
goto end;
}
s->version=SPP_VERSION;
s->type=SSL_ST_CONNECT;
if (s->init_buf == NULL) {
if ((buf=BUF_MEM_new()) == NULL) {
ret= -1;
goto end;
}
if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) {
ret= -1;
goto end;
}
s->init_buf=buf;
buf=NULL;
}
if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
/* setup buffing BIO */
if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
/* don't push the buffering BIO quite yet */
ssl3_init_finished_mac(s);
s->state=SSL3_ST_CW_CLNT_HELLO_A;
s->ctx->stats.sess_connect++;
s->init_num=0;
ret=1;
goto end;
default:
SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
ret= -1;
goto end;
}
}
end:
return(ret);
}
char * spp_next_proxy_address(SSL *s) {
int i;
//printf("Searching for proxy (%s) in proxy list %d\n", s->proxy_address, (int)s->proxies_len);
for (i = 0; i < s->proxies_len; i++) {
//printf("Comparing with %s ...\n", s->proxies[i]->address);
if (strcmp(s->proxies[i]->address, s->proxy_address) == 0) {
//printf("Match\n");
s->proxy_id = s->proxies[i]->proxy_id;
break;
}
}
// End the proxy list
if (i < s->proxies_len-1) {
//printf("Found next proxy %s\n", s->proxies[i+1]->address);
return s->proxies[i+1]->address;
} else if (i == s->proxies_len-1) {
// Last proxy, return server
//printf("Found server %s\n", s->spp_server_address);
return s->spp_server_address;
} else {
//printf("Not found\n");
return NULL;
}
}
int spp_initialize_ssl(SSL *s, SSL *n) {
int i;
// Initialize the new SSL state
s->other_ssl = n;
n->other_ssl = s;
n->proxy_id = s->proxy_id;
n->session = s->session;
/* Copy proxies and slices */
//printf("Proxy list is:\n");
n->proxies_len = s->proxies_len;
for (i = 0; i < s->proxies_len; i++) {
n->proxies[i] = (SPP_PROXY*)OPENSSL_malloc(sizeof(SPP_PROXY));
spp_init_proxy(n->proxies[i]);
n->proxies[i]->proxy_id = s->proxies[i]->proxy_id;
n->proxies[i]->address = s->proxies[i]->address;
//printf("%d: %s\n", n->proxies[i]->proxy_id, n->proxies[i]->address);
}
n->slices_len = s->slices_len;
for (i = 0; i < s->slices_len; i++) {
n->slices[i] = (SPP_SLICE*)OPENSSL_malloc(sizeof(SPP_SLICE));
spp_init_slice(n->slices[i]);
n->slices[i]->slice_id = s->slices[i]->slice_id;
n->slices[i]->purpose = s->slices[i]->purpose;
}
return 1;
}
void spp_proxies_count(SSL *s, int *ahead, int *behind) {
int i;
for (i = 0; i < s->proxies_len; i++) {
if (s->proxies[i]->proxy_id == s->proxy_id) {
break;
}
}
*ahead = i;
*behind = s->proxies_len - i - 1;
}
/* The below functions are essentially identical except for an offset.
* The read and write calls provided by openssl for handshake messages
* are inconsistent in whether the 4 byte header is included or not. */
int spp_forward_message(SSL *to, SSL*from) {
// When receiving a message, the helper functions automatically strip the header.
// Meant, from->init_msg = &(init_buf->data[init_off])+4
// So, keep the same pointer location into init_buf->data but increase the init_num value by 4.
to->init_num = from->init_num + 4;
to->init_off = from->init_off;
memcpy(&(to->init_buf->data[to->init_off]), &(from->init_buf->data[from->init_off]), to->init_num);
return(ssl3_do_write(to,SSL3_RT_HANDSHAKE));
}
int spp_duplicate_message(SSL *to, SSL*from) {
to->init_num = from->init_num;
to->init_off = from->init_off;
memcpy(&(to->init_buf->data[to->init_off]), &(from->init_buf->data[from->init_off]), to->init_num);
return(ssl3_do_write(to,SSL3_RT_HANDSHAKE));
}
/* Grab a handshake message from one state and forward it to the other. */
int get_proxy_msg(SSL *s, int st1, int stn, int msg, int forward) {
int n, ok;
n=s->method->ssl_get_message(s,
st1,
stn,
msg,
SSL3_RT_MAX_PLAIN_LENGTH,
&ok);
//printf("ok=%d\n", ok);
if (!ok) return n;
#if 0
printf("Got handshake message, len=%d, type=%d\n", n, s->s3->tmp.message_type);
spp_print_buffer(s->init_msg, s->init_num);
#endif
if (forward)
return spp_forward_message(s->other_ssl, s);
return 1;
}
long spp_get_finished(SSL *s, int st1, int stn)
{
unsigned char *p;
int i=0,al;
p=(unsigned char *)s->init_buf->data;
if (s->state == st1) {
while (1) {
i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE, &p[0],SSL3_RT_MAX_PLAIN_LENGTH, 0);
if (i <= 0) {
s->rwstate=SSL_READING;
return i;
}
s->init_num=i;
s->init_off=0;
/*#ifdef DEBUG
printf("Received during finished: ");
spp_print_buffer(p, s->init_num);
#endif*/
if (s->s3->change_cipher_spec) {
break;
}
// Forward the message along
i=spp_duplicate_message(s->other_ssl, s);
if (i<=0) goto err;
}
s->state=stn;
}
/*#ifdef DEBUG
printf("Got finished\n");
#endif*/
s->s3->tmp.message_type = SSL3_MT_FINISHED;
// Send to opposite.
// First, send change cipher spec
s->other_ssl->state=SSL3_ST_CW_CHANGE_A;
i=ssl3_send_change_cipher_spec(s->other_ssl, SSL3_ST_CW_CHANGE_A, SSL3_ST_CW_CHANGE_B);
if (i<=0) goto err;
// Then send finished
i=spp_duplicate_message(s->other_ssl, s);
if (i<=0) goto err;
return s->init_num;
f_err:
ssl3_send_alert(s,SSL3_AL_FATAL,al);
err:
return(-1);
}
int spp_process_server_hello(SSL *s) {
STACK_OF(SSL_CIPHER) *sk;
const SSL_CIPHER *c;
unsigned char *p,*d;
int i,al;
unsigned int j;
long n;
#ifndef OPENSSL_NO_COMP
SSL_COMP *comp;
#endif
n=s->init_num;
if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) {
al=SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
goto f_err;
}
d=p=(unsigned char *)s->init_msg;
/* Read the version number */
if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff))) {
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
s->version=(s->version&0xff00)|p[1];
al=SSL_AD_PROTOCOL_VERSION;
goto f_err;
}
p+=2;
/* load the server hello data */
/* load the server random */
memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
memcpy(s->other_ssl->s3->server_random,p,SSL3_RANDOM_SIZE);
p+=SSL3_RANDOM_SIZE;
/* get the session-id */
j= *(p++);
if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) {
al=SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
goto f_err;
}
#ifndef OPENSSL_NO_TLSEXT
/* check if we want to resume the session based on external pre-shared secret */
if (s->version >= TLS1_VERSION && s->tls_session_secret_cb) {
SSL_CIPHER *pref_cipher=NULL;
s->session->master_key_length=sizeof(s->session->master_key);
if (s->tls_session_secret_cb(s, s->session->master_key,
&s->session->master_key_length,
NULL, &pref_cipher,
s->tls_session_secret_cb_arg)) {
s->session->cipher = pref_cipher ?
pref_cipher : ssl_get_cipher_by_char(s, p+j);
s->s3->flags |= SSL3_FLAGS_CCS_OK;
s->other_ssl->s3->flags |= SSL3_FLAGS_CCS_OK;
}
s->other_ssl->session->master_key_length=s->session->master_key_length;
s->other_ssl->session->cipher=s->session->cipher;
}
#endif /* OPENSSL_NO_TLSEXT */
if (j != 0 && j == s->session->session_id_length
&& memcmp(p,s->session->session_id,j) == 0) {
if(s->sid_ctx_length != s->session->sid_ctx_length
|| memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length)) {
/* actually a client application bug */
al=SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
goto f_err;
}
s->other_ssl->s3->flags |= SSL3_FLAGS_CCS_OK;
s->s3->flags |= SSL3_FLAGS_CCS_OK;
s->hit=s->other_ssl->hit=1;
} else {
/* a miss or crap from the other end */
/* If we were trying for session-id reuse, make a new
* SSL_SESSION so we don't stuff up other people */
s->hit=s->other_ssl->hit=0;
if (s->session->session_id_length > 0) {
if (!ssl_get_new_session(s,0)) {
al=SSL_AD_INTERNAL_ERROR;
goto f_err;
}
s->other_ssl->session=s->session;
}
s->session->session_id_length=j;
memcpy(s->session->session_id,p,j); /* j could be 0 */
}
p+=j;
c=ssl_get_cipher_by_char(s,p);
if (c == NULL) {
/* unknown cipher */
al=SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
goto f_err;
}
/* TLS v1.2 only ciphersuites require v1.2 or later */
if ((c->algorithm_ssl & SSL_TLSV1_2) && (TLS1_get_version(s) < TLS1_2_VERSION)) {
al=SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
goto f_err;
}
#ifndef OPENSSL_NO_SRP
if (((c->algorithm_mkey & SSL_kSRP) || (c->algorithm_auth & SSL_aSRP)) && !(s->srp_ctx.srp_Mask & SSL_kSRP)) {
al=SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
goto f_err;
}
#endif /* OPENSSL_NO_SRP */
p+=ssl_put_cipher_by_char(s,NULL,NULL);
sk=ssl_get_ciphers_by_id(s);
i=sk_SSL_CIPHER_find(sk,c);
if (i < 0) {
/* we did not say we would use this cipher */
al=SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
goto f_err;
}
/* Depending on the session caching (internal/external), the cipher
* and/or cipher_id values may not be set. Make sure that
* cipher_id is set and use it for comparison. */
if (s->session->cipher)
s->session->cipher_id = s->session->cipher->id;
if (s->hit && (s->session->cipher_id != c->id)) {
/* Workaround is now obsolete */
#if 0
if (!(s->options &
SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
#endif
{
al=SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
goto f_err;
}
}
s->s3->tmp.new_cipher=s->other_ssl->s3->tmp.new_cipher=c;
/* lets get the compression algorithm */
/* COMPRESSION */
#ifdef OPENSSL_NO_COMP
if (*(p++) != 0) {
al=SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
goto f_err;
}
/* If compression is disabled we'd better not try to resume a session
* using compression.
*/
if (s->session->compress_meth != 0) {
al=SSL_AD_INTERNAL_ERROR;
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
goto f_err;
}
#else
j= *(p++);
if (s->hit && j != s->session->compress_meth) {
al=SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
goto f_err;
}
if (j == 0)
comp=NULL;
else if (s->options & SSL_OP_NO_COMPRESSION) {
al=SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
goto f_err;
} else
comp=ssl3_comp_find(s->ctx->comp_methods,j);
if ((j != 0) && (comp == NULL)) {
al=SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
goto f_err;
} else {
s->s3->tmp.new_compression=s->other_ssl->s3->tmp.new_compression=comp;
}
#endif
#ifndef OPENSSL_NO_TLSEXT
/* TLS extensions*/
if (s->version >= SSL3_VERSION) {
if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al)) {
/* 'al' set by ssl_parse_serverhello_tlsext */
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
goto f_err;
}
if (ssl_check_serverhello_tlsext(s) <= 0) {
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
goto err;
}
}
#endif
if (p != (d+n)) {
/* wrong packet length */
al=SSL_AD_DECODE_ERROR;
SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
goto f_err;
}
return(1);
f_err:
ssl3_send_alert(s,SSL3_AL_FATAL,al);
err:
return(-1);
}
/* Function checks to make sure that this message is for this proxy before
* calling get_proxy_material_ext which puts a shitload more memory on the stack. */
int get_proxy_material(SSL *s, int server) {
unsigned char *key_mat_envelope = NULL;
int id;
key_mat_envelope = (unsigned char *)s->init_msg;
/* Get the ID */
n1s(key_mat_envelope, id);
if (id != s->proxy_id) {
/* Material not intended for this proxy */
return 1;
} else {
return get_proxy_material_ext(s, server);
}
}
int get_proxy_material_ext(SSL *s, int server) {
unsigned char key_mat[SSL3_RT_MAX_PLAIN_LENGTH];
int *key_mat_len = 0;
EVP_PKEY *private_key = NULL;
unsigned char *key_mat_envelope = NULL, *d;
int encrypted_envelope_key_len = 0;
unsigned char *envelope_iv;
//unsigned char encrypted_envelope_key[128] = {0};
unsigned char *encrypted_envelope_key;
int encrypted_key_mat_len = 0;
unsigned char *encrypted_key_mat; /* HACK size... */
int n, shared_secret_len;
unsigned char *shared_secret=NULL;
key_mat_envelope = d = (unsigned char *)s->init_msg;
n = s->init_num;
key_mat_envelope++; // Skip id
private_key = (server ? s->other_ssl->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey : s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey);
/* get length of encrypted envelope key */
n2l3(key_mat_envelope, encrypted_envelope_key_len);
if (encrypted_envelope_key_len > 128)
goto err;
/* now pull out the encrypted envelope key */
/* Memcpy unnecessary. */
//memcpy(encrypted_envelope_key, key_mat_envelope, encrypted_envelope_key_len); // );
encrypted_envelope_key = key_mat_envelope;
// printf("encrypted envelope key:\n");
// spp_print_buffer(encrypted_envelope_key, encrypted_envelope_key_len);
/* advance pointer! */
key_mat_envelope += encrypted_envelope_key_len;
/* read iv */
// printf("reading iv\n");
//memcpy(envelope_iv, key_mat_envelope, EVP_MAX_IV_LENGTH);
envelope_iv = key_mat_envelope;
// printf("envelope_iv:\n");
// // printf("%s\n", envelope_iv);
// spp_print_buffer(envelope_iv, EVP_MAX_IV_LENGTH);
/* advance pointer! */
key_mat_envelope += EVP_MAX_IV_LENGTH;
/* get legnth of encrypted key material */
n2l3(key_mat_envelope, encrypted_key_mat_len);
/* pull the encrypted key material out! */
//memcpy(encrypted_key_mat, key_mat_envelope, encrypted_key_mat_len);
encrypted_key_mat = key_mat_envelope;
// printf("Encrypted key material:\n");
// spp_print_buffer(encrypted_key_mat, encrypted_key_mat_len);
key_mat_envelope += encrypted_key_mat_len;
/* Confirm the message is the correct size. */
if (n != (key_mat_envelope - d)) {
printf("Message size wrong, header:%d, actual:%d\n", n, (key_mat_envelope - d));
goto err;
}
//printf("opening envelope!\n");
key_mat_len = envelope_open(
private_key,
encrypted_key_mat,
encrypted_key_mat_len,
encrypted_envelope_key,
encrypted_envelope_key_len,
envelope_iv,
key_mat,
&shared_secret,
&shared_secret_len
);
/* Proxy actually has no reason to save the secret, cleanse and free */
if (shared_secret != NULL) {
OPENSSL_cleanse(shared_secret,shared_secret_len);
OPENSSL_free(shared_secret);
}
/*printf("key mat len: %d\n", key_mat_len);
spp_print_buffer(key_mat, key_mat_len);*/
return spp_proxy_unpack_mat(s, key_mat, key_mat_len, server);
err:
printf("Error in get_proxy_material_ext\n");
return -1;
}
int spp_proxy_unpack_mat(SSL *s, unsigned char *p, long n, int server) {
int slice_id, len;
SPP_SLICE *slice, *slice2;
unsigned char *param=p;
/* More to read */
while (p-param < n) {
n1s(p, slice_id);
//printf("Slice %d received\n", slice_id);
slice = SPP_get_slice_by_id(s, slice_id);
slice2 = SPP_get_slice_by_id(s->other_ssl, slice_id);
if (slice == NULL)
goto err;
n2s(p, len);
if (len > EVP_MAX_KEY_LENGTH)
goto err;
if (len > 0) {
if (server) {
memcpy(slice->other_read_mat, p, len);
memcpy(slice2->other_read_mat, p, len);
} else {
memcpy(slice->read_mat, p, len);
memcpy(slice2->read_mat, p, len);
}
p += len;
slice->read_access = 1;
slice2->read_access = 1;
}
n2s(p, len);
if (len > EVP_MAX_KEY_LENGTH)
goto err;
if (len> 0) {
if (server) {
memcpy(slice->other_write_mat, p, len);
memcpy(slice2->other_write_mat, p, len);
} else {
memcpy(slice->write_mat, p, len);
memcpy(slice2->write_mat, p, len);
}
p += len;
slice->write_access = 1;
slice2->write_access = 1;
}
}
/* Should now have read the full message. */
if (p-param != n) {
printf("Did not read the whole message, %d != %d\n", p-param, n);
goto err;
}
//printf("Done\n");
return 1;
err:
printf("Error reading proxy key material\n");
return(-1);
}
int spp_proxy_accept(SSL *s) {
SSL *next_st=NULL;
BUF_MEM *buf;
char *address;
SPP_PROXY *proxy=NULL, *this_proxy;
unsigned long alg_k,Time=(unsigned long)time(NULL);
void (*cb)(const SSL *ssl,int type,int val)=NULL;
int ahead,behind;
int ret= -1,i;
int new_state,state,skip=0;
/* Matteo -- START
struct timeval currTime; // keep current time
struct timeval prevTime; // keep previous time (to compute time passed)
struct timeval originTime; // keep previous time (to compute time passed)
/* Matteo -- END*/
RAND_add(&Time,sizeof(Time),0);
ERR_clear_error();
clear_sys_error();
if (s->info_callback != NULL)
cb=s->info_callback;
else if (s->ctx->info_callback != NULL)
cb=s->ctx->info_callback;
/* init things to blank */
s->in_handshake++;
if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
if (s->cert == NULL) {
SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
return(-1);
}
#ifndef OPENSSL_NO_HEARTBEATS
/* If we're awaiting a HeartbeatResponse, pretend we
* already got and don't await it anymore, because
* Heartbeats don't make sense during handshakes anyway.
*/
if (s->tlsext_hb_pending) {
s->tlsext_hb_pending = 0;
s->tlsext_hb_seq++;
}
#endif
for (;;) {
state=s->state;
if (next_st != NULL)
next_st->state=s->state;
switch (s->state) {
case SSL_ST_RENEGOTIATE:
s->renegotiate=1;
/* s->state=SSL_ST_ACCEPT; */
case SSL_ST_BEFORE:
case SSL_ST_ACCEPT:
case SSL_ST_BEFORE|SSL_ST_ACCEPT:
case SSL_ST_OK|SSL_ST_ACCEPT:
// Initialize timers
gettimeofday(&currTime, NULL);
gettimeofday(&prevTime, NULL);
gettimeofday(&originTime, NULL);
#ifdef DEBUG
log_time("Before handshake\n", &currTime, &prevTime, &originTime);
#endif
s->server = 1;
s->proxy = 1;
if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
if ((s->version>>8) != 6) {
SSLerr(SSL_F_SSL3_ACCEPT, ERR_R_INTERNAL_ERROR);
return -1;
}
s->type=SSL_ST_ACCEPT;
if (s->init_buf == NULL) {
if ((buf=BUF_MEM_new()) == NULL) {
ret= -1;
goto end;
}
if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) {
ret= -1;
goto end;
}
s->init_buf=buf;
}
if (!ssl3_setup_buffers(s)) {
ret= -1;
goto end;
}
s->init_num=0;
s->s3->flags &= ~SSL3_FLAGS_SGC_RESTART_DONE;
if (s->state != SSL_ST_RENEGOTIATE) {
/* Ok, we now need to push on a buffering BIO so that
* the output is sent in a way that TCP likes :-)
*/
if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; }
ssl3_init_finished_mac(s);
s->state=SSL3_ST_SR_CLNT_HELLO_A;
s->ctx->stats.sess_accept++;
} else if (!s->s3->send_connection_binding && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) {
/* Server attempting to renegotiate with
* client that doesn't support secure
* renegotiation.
*/
SSLerr(SSL_F_SSL3_ACCEPT, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
ret = -1;
goto end;
} else {
/* s->state == SSL_ST_RENEGOTIATE,
* we will just send a HelloRequest */
s->ctx->stats.sess_accept_renegotiate++;
s->state=SSL3_ST_SW_HELLO_REQ_A;
}
break;
case SSL3_ST_SR_CLNT_HELLO_A:
case SSL3_ST_SR_CLNT_HELLO_B:
case SSL3_ST_SR_CLNT_HELLO_C:
s->shutdown=0;
if (s->rwstate != SSL_X509_LOOKUP) {
ret=ssl3_get_client_hello(s);
#ifdef DEBUG
log_time("Received client hello\n", &currTime, &prevTime, &originTime);
#endif
if (ret <= 0) goto end;
}
// Process locally and call application to start new connection
if ((address = spp_next_proxy_address(s)) == NULL)
goto end;
//printf("Next address is %s\n", address);
#ifdef DEBUG
log_time("Passing control to application\n", &currTime, &prevTime, &originTime);
#endif
if ((next_st = s->proxy_func(s, address)) == NULL)
goto end;
#ifdef DEBUG
log_time("Application returned\n", &currTime, &prevTime, &originTime);
#endif
//printf("Callback returned\n");
if (SSL_connect(next_st) <= 0)
goto end;
spp_initialize_ssl(s, next_st);
this_proxy = SPP_get_proxy_by_id(s, s->proxy_id);
// Forward the message on.
ret=spp_forward_message(next_st, s);
if (ret <= 0) goto end;
s->renegotiate = 2;
s->state=SSL3_ST_CR_SRVR_HELLO_A;
s->init_num=next_st->init_num=0;
//Turn on buffering for the remainder of the handshake
if (next_st->bbio != next_st->wbio)
next_st->wbio=BIO_push(next_st->bbio,next_st->wbio);
break;
case SSL3_ST_CR_SRVR_HELLO_A:
case SSL3_ST_CR_SRVR_HELLO_B:
// Must read from the hello to determine what ciphers are in use.
ret=get_proxy_msg(next_st, SSL3_ST_CR_SRVR_HELLO_A, SSL3_ST_CR_SRVR_HELLO_B, -1,1);
#ifdef DEBUG
log_time("Received server hello\n", &currTime, &prevTime, &originTime);
#endif
if (ret <= 0) goto end;
ret=spp_process_server_hello(next_st);
if (ret <= 0) goto end;
s->state=SSL3_ST_CR_CERT_A;
s->init_num=next_st->init_num=0;
break;
case SSL3_ST_CR_CERT_A:
case SSL3_ST_CR_CERT_B:
ret=get_proxy_msg(next_st, SSL3_ST_CR_CERT_A, SSL3_ST_CR_CERT_B, SSL3_MT_CERTIFICATE,1);
#ifdef DEBUG
log_time("Received server certificate\n", &currTime, &prevTime, &originTime);
#endif
if (ret <= 0) goto end;
s->state=SSL3_ST_CR_KEY_EXCH_A;
//SSL3_ST_CR_SRVR_DONE_A; //SSL3_ST_CR_KEY_EXCH_A; Sent in DH, not RSA ciphersuites
s->init_num=next_st->init_num=0;
break;
case SSL3_ST_CR_KEY_EXCH_A:
case SSL3_ST_CR_KEY_EXCH_B:
ret=get_proxy_msg(next_st, SSL3_ST_CR_KEY_EXCH_A, SSL3_ST_CR_KEY_EXCH_B, SSL3_MT_SERVER_KEY_EXCHANGE,1);
#ifdef DEBUG
log_time("Received server key exchange\n", &currTime, &prevTime, &originTime);
#endif
if (ret <= 0) goto end;
s->state=SSL3_ST_CR_SRVR_DONE_A;
s->init_num=next_st->init_num=0;
/* at this point we check that we have the
* required stuff from the server */
/*if (!ssl3_check_cert_and_algorithm(next_st)) {
ret= -1;
goto end;
}*/
break;
case SSL3_ST_CR_SRVR_DONE_A:
case SSL3_ST_CR_SRVR_DONE_B:
ret=get_proxy_msg(next_st, SSL3_ST_CR_SRVR_DONE_A, SSL3_ST_CR_SRVR_DONE_B, SSL3_MT_SERVER_DONE, 1);
#ifdef DEBUG
log_time("Received server done\n", &currTime, &prevTime, &originTime);
#endif
if (ret <= 0) goto end;
if (s->s3->tmp.cert_req)
goto end;
else if ((proxy = spp_get_next_proxy(s, NULL, 0)) != NULL && proxy->proxy_id != s->proxy_id) {
/* Received certs from proxies between this proxy and the server. */
//s->state=SPP_ST_SW_AHEAD_FLUSH;
//s->s3->tmp.next_state=SPP_ST_PR_BEHIND_A;
s->state=SPP_ST_PR_BEHIND_A;
} else {
/* Send our certificate. */
//s->state=SPP_ST_SW_AHEAD_FLUSH;
//s->s3->tmp.next_state=SSL3_ST_SW_CERT_A;
s->state=SSL3_ST_SW_CERT_A;
}
s->init_num=next_st->init_num=0;
break;
case SSL3_ST_SW_CERT_A:
case SSL3_ST_SW_CERT_B:
/* Check if it is anon DH or anon ECDH, */
/* normal PSK or KRB5 or SRP */
if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL|SSL_aKRB5|SSL_aSRP))
&& !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
#ifdef DEBUG
log_time("Sending proxy certificate\n", &currTime, &prevTime, &originTime);
#endif
ret=ssl3_send_server_certificate(s); //OK
if (ret <= 0) goto end;
ret=spp_duplicate_message(next_st, s);
if (ret <= 0) goto end;
} else
skip=1;
s->state=SSL3_ST_SW_KEY_EXCH_A;
s->init_num=next_st->init_num=0;
break;
case SSL3_ST_SW_KEY_EXCH_A:
case SSL3_ST_SW_KEY_EXCH_B:
alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
/* clear this, it may get reset by
* send_server_key_exchange */
if ((s->options & SSL_OP_EPHEMERAL_RSA)
#ifndef OPENSSL_NO_KRB5
&& !(alg_k & SSL_kKRB5)
#endif /* OPENSSL_NO_KRB5 */
)
/* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key
* even when forbidden by protocol specs
* (handshake may fail as clients are not required to
* be able to handle this) */
s->s3->tmp.use_rsa_tmp=1;
else
s->s3->tmp.use_rsa_tmp=0;
/* only send if a DH key exchange, fortezza or
* RSA but we have a sign only certificate
*
* PSK: may send PSK identity hints
*
* For ECC ciphersuites, we send a serverKeyExchange
* message only if the cipher suite is either
* ECDH-anon or ECDHE. In other cases, the
* server certificate contains the server's
* public key for key exchange.
*/
if (s->s3->tmp.use_rsa_tmp
/* PSK: send ServerKeyExchange if PSK identity
* hint if provided */
#ifndef OPENSSL_NO_PSK
|| ((alg_k & SSL_kPSK) && s->ctx->psk_identity_hint)
#endif
#ifndef OPENSSL_NO_SRP
/* SRP: send ServerKeyExchange */
|| (alg_k & SSL_kSRP)
#endif
|| (alg_k & (SSL_kDHr|SSL_kDHd|SSL_kEDH))
|| (alg_k & SSL_kEECDH)
|| ((alg_k & SSL_kRSA)
&& (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
|| (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)
&& EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)
)
)
)
)
{
#ifdef DEBUG
log_time("Sending proxy key exchange\n", &currTime, &prevTime, &originTime);
#endif
ret=ssl3_send_server_key_exchange(s); //OK
if (ret <= 0) goto end;
ret=spp_duplicate_message(next_st, s);
if (ret <= 0) goto end;
}
else
skip=1;
s->state=SSL3_ST_SW_SRVR_DONE_A;
s->init_num=next_st->init_num=0;
break;
case SSL3_ST_SW_SRVR_DONE_A:
case SSL3_ST_SW_SRVR_DONE_B:
#ifdef DEBUG
log_time("Sending proxy done\n", &currTime, &prevTime, &originTime);
#endif
ret=ssl3_send_server_done(s); //OK
if (ret <= 0) goto end;
ret=spp_duplicate_message(next_st, s);
if (ret <= 0) goto end;