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-rw-r--r--ssl/s2_srvr.c1997
1 files changed, 974 insertions, 1023 deletions
diff --git a/ssl/s2_srvr.c b/ssl/s2_srvr.c
index 8ad2322ba9..256325707c 100644
--- a/ssl/s2_srvr.c
+++ b/ssl/s2_srvr.c
@@ -5,21 +5,21 @@
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
- *
+ *
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
+ *
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
- *
+ *
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
@@ -34,10 +34,10 @@
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
+ * 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
+ *
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
@@ -49,7 +49,7 @@
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
- *
+ *
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
@@ -63,7 +63,7 @@
* are met:
*
* 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
@@ -111,1059 +111,1010 @@
#include "ssl_locl.h"
#ifndef OPENSSL_NO_SSL2
-#include <stdio.h>
-#include <openssl/bio.h>
-#include <openssl/rand.h>
-#include <openssl/objects.h>
-#include <openssl/evp.h>
+# include <stdio.h>
+# include <openssl/bio.h>
+# include <openssl/rand.h>
+# include <openssl/objects.h>
+# include <openssl/evp.h>
static const SSL_METHOD *ssl2_get_server_method(int ver);
static int get_client_master_key(SSL *s);
static int get_client_hello(SSL *s);
-static int server_hello(SSL *s);
+static int server_hello(SSL *s);
static int get_client_finished(SSL *s);
static int server_verify(SSL *s);
static int server_finish(SSL *s);
static int request_certificate(SSL *s);
static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from,
- unsigned char *to,int padding);
-#define BREAK break
+ unsigned char *to, int padding);
+# define BREAK break
static const SSL_METHOD *ssl2_get_server_method(int ver)
- {
- if (ver == SSL2_VERSION)
- return(SSLv2_server_method());
- else
- return(NULL);
- }
+{
+ if (ver == SSL2_VERSION)
+ return (SSLv2_server_method());
+ else
+ return (NULL);
+}
IMPLEMENT_ssl2_meth_func(SSLv2_server_method,
- ssl2_accept,
- ssl_undefined_function,
- ssl2_get_server_method)
+ ssl2_accept,
+ ssl_undefined_function, ssl2_get_server_method)
int ssl2_accept(SSL *s)
- {
- unsigned long l=(unsigned long)time(NULL);
- BUF_MEM *buf=NULL;
- int ret= -1;
- long num1;
- void (*cb)(const SSL *ssl,int type,int val)=NULL;
- int new_state,state;
-
- RAND_add(&l,sizeof(l),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_SSL2_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
- return(-1);
- }
-
- clear_sys_error();
- for (;;)
- {
- state=s->state;
-
- switch (s->state)
- {
- case SSL_ST_BEFORE:
- case SSL_ST_ACCEPT:
- case SSL_ST_BEFORE|SSL_ST_ACCEPT:
- case SSL_ST_OK|SSL_ST_ACCEPT:
-
- s->server=1;
- if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
-
- s->version=SSL2_VERSION;
- 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,(int) SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
- {
- BUF_MEM_free(buf);
- ret= -1;
- goto end;
- }
- s->init_buf=buf;
- }
- s->init_num=0;
- s->ctx->stats.sess_accept++;
- s->handshake_func=ssl2_accept;
- s->state=SSL2_ST_GET_CLIENT_HELLO_A;
- BREAK;
-
- case SSL2_ST_GET_CLIENT_HELLO_A:
- case SSL2_ST_GET_CLIENT_HELLO_B:
- case SSL2_ST_GET_CLIENT_HELLO_C:
- s->shutdown=0;
- ret=get_client_hello(s);
- if (ret <= 0) goto end;
- s->init_num=0;
- s->state=SSL2_ST_SEND_SERVER_HELLO_A;
- BREAK;
-
- case SSL2_ST_SEND_SERVER_HELLO_A:
- case SSL2_ST_SEND_SERVER_HELLO_B:
- ret=server_hello(s);
- if (ret <= 0) goto end;
- s->init_num=0;
- if (!s->hit)
- {
- s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_A;
- BREAK;
- }
- else
- {
- s->state=SSL2_ST_SERVER_START_ENCRYPTION;
- BREAK;
- }
- case SSL2_ST_GET_CLIENT_MASTER_KEY_A:
- case SSL2_ST_GET_CLIENT_MASTER_KEY_B:
- ret=get_client_master_key(s);
- if (ret <= 0) goto end;
- s->init_num=0;
- s->state=SSL2_ST_SERVER_START_ENCRYPTION;
- BREAK;
-
- case SSL2_ST_SERVER_START_ENCRYPTION:
- /* Ok we how have sent all the stuff needed to
- * start encrypting, the next packet back will
- * be encrypted. */
- if (!ssl2_enc_init(s,0))
- { ret= -1; goto end; }
- s->s2->clear_text=0;
- s->state=SSL2_ST_SEND_SERVER_VERIFY_A;
- BREAK;
-
- case SSL2_ST_SEND_SERVER_VERIFY_A:
- case SSL2_ST_SEND_SERVER_VERIFY_B:
- ret=server_verify(s);
- if (ret <= 0) goto end;
- s->init_num=0;
- if (s->hit)
- {
- /* If we are in here, we have been
- * buffering the output, so we need to
- * flush it and remove buffering from
- * future traffic */
- s->state=SSL2_ST_SEND_SERVER_VERIFY_C;
- BREAK;
- }
- else
- {
- s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
- break;
- }
-
- case SSL2_ST_SEND_SERVER_VERIFY_C:
- /* get the number of bytes to write */
- num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
- if (num1 > 0)
- {
- s->rwstate=SSL_WRITING;
- num1=BIO_flush(s->wbio);
- if (num1 <= 0) { ret= -1; goto end; }
- s->rwstate=SSL_NOTHING;
- }
-
- /* flushed and now remove buffering */
- s->wbio=BIO_pop(s->wbio);
-
- s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
- BREAK;
-
- case SSL2_ST_GET_CLIENT_FINISHED_A:
- case SSL2_ST_GET_CLIENT_FINISHED_B:
- ret=get_client_finished(s);
- if (ret <= 0)
- goto end;
- s->init_num=0;
- s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_A;
- BREAK;
-
- case SSL2_ST_SEND_REQUEST_CERTIFICATE_A:
- case SSL2_ST_SEND_REQUEST_CERTIFICATE_B:
- case SSL2_ST_SEND_REQUEST_CERTIFICATE_C:
- case SSL2_ST_SEND_REQUEST_CERTIFICATE_D:
- /* don't do a 'request certificate' if we
- * don't want to, or we already have one, and
- * we only want to do it once. */
- if (!(s->verify_mode & SSL_VERIFY_PEER) ||
- ((s->session->peer != NULL) &&
- (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)))
- {
- s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
- break;
- }
- else
- {
- ret=request_certificate(s);
- if (ret <= 0) goto end;
- s->init_num=0;
- s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
- }
- BREAK;
-
- case SSL2_ST_SEND_SERVER_FINISHED_A:
- case SSL2_ST_SEND_SERVER_FINISHED_B:
- ret=server_finish(s);
- if (ret <= 0) goto end;
- s->init_num=0;
- s->state=SSL_ST_OK;
- break;
-
- case SSL_ST_OK:
- BUF_MEM_free(s->init_buf);
- ssl_free_wbio_buffer(s);
- s->init_buf=NULL;
- s->init_num=0;
- /* ERR_clear_error();*/
-
- ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
-
- s->ctx->stats.sess_accept_good++;
- /* s->server=1; */
- ret=1;
-
- if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
-
- goto end;
- /* BREAK; */
-
- default:
- SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_UNKNOWN_STATE);
- ret= -1;
- goto end;
- /* BREAK; */
- }
-
- if ((cb != NULL) && (s->state != state))
- {
- new_state=s->state;
- s->state=state;
- cb(s,SSL_CB_ACCEPT_LOOP,1);
- s->state=new_state;
- }
- }
-end:
- s->in_handshake--;
- if (cb != NULL)
- cb(s,SSL_CB_ACCEPT_EXIT,ret);
- return(ret);
- }
+{
+ unsigned long l = (unsigned long)time(NULL);
+ BUF_MEM *buf = NULL;
+ int ret = -1;
+ long num1;
+ void (*cb) (const SSL *ssl, int type, int val) = NULL;
+ int new_state, state;
+
+ RAND_add(&l, sizeof(l), 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_SSL2_ACCEPT, SSL_R_NO_CERTIFICATE_SET);
+ return (-1);
+ }
+
+ clear_sys_error();
+ for (;;) {
+ state = s->state;
+
+ switch (s->state) {
+ case SSL_ST_BEFORE:
+ case SSL_ST_ACCEPT:
+ case SSL_ST_BEFORE | SSL_ST_ACCEPT:
+ case SSL_ST_OK | SSL_ST_ACCEPT:
+
+ s->server = 1;
+ if (cb != NULL)
+ cb(s, SSL_CB_HANDSHAKE_START, 1);
+
+ s->version = SSL2_VERSION;
+ 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, (int)SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) {
+ BUF_MEM_free(buf);
+ ret = -1;
+ goto end;
+ }
+ s->init_buf = buf;
+ }
+ s->init_num = 0;
+ s->ctx->stats.sess_accept++;
+ s->handshake_func = ssl2_accept;
+ s->state = SSL2_ST_GET_CLIENT_HELLO_A;
+ BREAK;
+
+ case SSL2_ST_GET_CLIENT_HELLO_A:
+ case SSL2_ST_GET_CLIENT_HELLO_B:
+ case SSL2_ST_GET_CLIENT_HELLO_C:
+ s->shutdown = 0;
+ ret = get_client_hello(s);
+ if (ret <= 0)
+ goto end;
+ s->init_num = 0;
+ s->state = SSL2_ST_SEND_SERVER_HELLO_A;
+ BREAK;
+
+ case SSL2_ST_SEND_SERVER_HELLO_A:
+ case SSL2_ST_SEND_SERVER_HELLO_B:
+ ret = server_hello(s);
+ if (ret <= 0)
+ goto end;
+ s->init_num = 0;
+ if (!s->hit) {
+ s->state = SSL2_ST_GET_CLIENT_MASTER_KEY_A;
+ BREAK;
+ } else {
+ s->state = SSL2_ST_SERVER_START_ENCRYPTION;
+ BREAK;
+ }
+ case SSL2_ST_GET_CLIENT_MASTER_KEY_A:
+ case SSL2_ST_GET_CLIENT_MASTER_KEY_B:
+ ret = get_client_master_key(s);
+ if (ret <= 0)
+ goto end;
+ s->init_num = 0;
+ s->state = SSL2_ST_SERVER_START_ENCRYPTION;
+ BREAK;
+
+ case SSL2_ST_SERVER_START_ENCRYPTION:
+ /*
+ * Ok we how have sent all the stuff needed to start encrypting,
+ * the next packet back will be encrypted.
+ */
+ if (!ssl2_enc_init(s, 0)) {
+ ret = -1;
+ goto end;
+ }
+ s->s2->clear_text = 0;
+ s->state = SSL2_ST_SEND_SERVER_VERIFY_A;
+ BREAK;
+
+ case SSL2_ST_SEND_SERVER_VERIFY_A:
+ case SSL2_ST_SEND_SERVER_VERIFY_B:
+ ret = server_verify(s);
+ if (ret <= 0)
+ goto end;
+ s->init_num = 0;
+ if (s->hit) {
+ /*
+ * If we are in here, we have been buffering the output, so
+ * we need to flush it and remove buffering from future
+ * traffic
+ */
+ s->state = SSL2_ST_SEND_SERVER_VERIFY_C;
+ BREAK;
+ } else {
+ s->state = SSL2_ST_GET_CLIENT_FINISHED_A;
+ break;
+ }
+
+ case SSL2_ST_SEND_SERVER_VERIFY_C:
+ /* get the number of bytes to write */
+ num1 = BIO_ctrl(s->wbio, BIO_CTRL_INFO, 0, NULL);
+ if (num1 > 0) {
+ s->rwstate = SSL_WRITING;
+ num1 = BIO_flush(s->wbio);
+ if (num1 <= 0) {
+ ret = -1;
+ goto end;
+ }
+ s->rwstate = SSL_NOTHING;
+ }
+
+ /* flushed and now remove buffering */
+ s->wbio = BIO_pop(s->wbio);
+
+ s->state = SSL2_ST_GET_CLIENT_FINISHED_A;
+ BREAK;
+
+ case SSL2_ST_GET_CLIENT_FINISHED_A:
+ case SSL2_ST_GET_CLIENT_FINISHED_B:
+ ret = get_client_finished(s);
+ if (ret <= 0)
+ goto end;
+ s->init_num = 0;
+ s->state = SSL2_ST_SEND_REQUEST_CERTIFICATE_A;
+ BREAK;
+
+ case SSL2_ST_SEND_REQUEST_CERTIFICATE_A:
+ case SSL2_ST_SEND_REQUEST_CERTIFICATE_B:
+ case SSL2_ST_SEND_REQUEST_CERTIFICATE_C:
+ case SSL2_ST_SEND_REQUEST_CERTIFICATE_D:
+ /*
+ * don't do a 'request certificate' if we don't want to, or we
+ * already have one, and we only want to do it once.
+ */
+ if (!(s->verify_mode & SSL_VERIFY_PEER) ||
+ ((s->session->peer != NULL) &&
+ (s->verify_mode & SSL_VERIFY_CLIENT_ONCE))) {
+ s->state = SSL2_ST_SEND_SERVER_FINISHED_A;
+ break;
+ } else {
+ ret = request_certificate(s);
+ if (ret <= 0)
+ goto end;
+ s->init_num = 0;
+ s->state = SSL2_ST_SEND_SERVER_FINISHED_A;
+ }
+ BREAK;
+
+ case SSL2_ST_SEND_SERVER_FINISHED_A:
+ case SSL2_ST_SEND_SERVER_FINISHED_B:
+ ret = server_finish(s);
+ if (ret <= 0)
+ goto end;
+ s->init_num = 0;
+ s->state = SSL_ST_OK;
+ break;
+
+ case SSL_ST_OK:
+ BUF_MEM_free(s->init_buf);
+ ssl_free_wbio_buffer(s);
+ s->init_buf = NULL;
+ s->init_num = 0;
+ /* ERR_clear_error(); */
+
+ ssl_update_cache(s, SSL_SESS_CACHE_SERVER);
+
+ s->ctx->stats.sess_accept_good++;
+ /* s->server=1; */
+ ret = 1;
+
+ if (cb != NULL)
+ cb(s, SSL_CB_HANDSHAKE_DONE, 1);
+
+ goto end;
+ /* BREAK; */
+
+ default:
+ SSLerr(SSL_F_SSL2_ACCEPT, SSL_R_UNKNOWN_STATE);
+ ret = -1;
+ goto end;
+ /* BREAK; */
+ }
+
+ if ((cb != NULL) && (s->state != state)) {
+ new_state = s->state;
+ s->state = state;
+ cb(s, SSL_CB_ACCEPT_LOOP, 1);
+ s->state = new_state;
+ }
+ }
+ end:
+ s->in_handshake--;
+ if (cb != NULL)
+ cb(s, SSL_CB_ACCEPT_EXIT, ret);
+ return (ret);
+}
static int get_client_master_key(SSL *s)
- {
- int is_export,i,n,keya,ek;
- unsigned long len;
- unsigned char *p;
- const SSL_CIPHER *cp;
- const EVP_CIPHER *c;
- const EVP_MD *md;
-
- p=(unsigned char *)s->init_buf->data;
- if (s->state == SSL2_ST_GET_CLIENT_MASTER_KEY_A)
- {
- i=ssl2_read(s,(char *)&(p[s->init_num]),10-s->init_num);
-
- if (i < (10-s->init_num))
- return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
- s->init_num = 10;
-
- if (*(p++) != SSL2_MT_CLIENT_MASTER_KEY)
- {
- if (p[-1] != SSL2_MT_ERROR)
- {
- ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
- SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_READ_WRONG_PACKET_TYPE);
- }
- else
- SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_PEER_ERROR);
- return(-1);
- }
-
- cp=ssl2_get_cipher_by_char(p);
- if (cp == NULL)
- {
- ssl2_return_error(s,SSL2_PE_NO_CIPHER);
- SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_NO_CIPHER_MATCH);
- return(-1);
- }
- s->session->cipher= cp;
-
- p+=3;
- n2s(p,i); s->s2->tmp.clear=i;
- n2s(p,i); s->s2->tmp.enc=i;
- n2s(p,i);
- if(i > SSL_MAX_KEY_ARG_LENGTH)
- {
- ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
- SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_KEY_ARG_TOO_LONG);
- return -1;
- }
- s->session->key_arg_length=i;
- s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_B;
- }
-
- /* SSL2_ST_GET_CLIENT_MASTER_KEY_B */
- p=(unsigned char *)s->init_buf->data;
- if (s->init_buf->length < SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
- {
- ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
- SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
- return -1;
- }
- keya=s->session->key_arg_length;
- len = 10 + (unsigned long)s->s2->tmp.clear + (unsigned long)s->s2->tmp.enc + (unsigned long)keya;
- if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
- {
- ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
- SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_MESSAGE_TOO_LONG);
- return -1;
- }
- n = (int)len - s->init_num;
- i = ssl2_read(s,(char *)&(p[s->init_num]),n);
- if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
- if (s->msg_callback)
- {
- /* CLIENT-MASTER-KEY */
- s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg);
- }
- p += 10;
-
- memcpy(s->session->key_arg,&(p[s->s2->tmp.clear+s->s2->tmp.enc]),
- (unsigned int)keya);
-
- if (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)
- {
- ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
- SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_NO_PRIVATEKEY);
- return(-1);
- }
- i=ssl_rsa_private_decrypt(s->cert,s->s2->tmp.enc,
- &(p[s->s2->tmp.clear]),&(p[s->s2->tmp.clear]),
- (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING);
-
- is_export=SSL_C_IS_EXPORT(s->session->cipher);
-
- if (!ssl_cipher_get_evp(s->session,&c,&md,NULL,NULL,NULL))
- {
- ssl2_return_error(s,SSL2_PE_NO_CIPHER);
- SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
- return(0);
- }
-
- if (s->session->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
- {
- is_export=1;
- ek=8;
- }
- else
- ek=5;
-
- /* bad decrypt */
-#if 1
- /* If a bad decrypt, continue with protocol but with a
- * random master secret (Bleichenbacher attack) */
- if ((i < 0) ||
- ((!is_export && (i != EVP_CIPHER_key_length(c)))
- || (is_export && ((i != ek) || (s->s2->tmp.clear+(unsigned int)i !=
- (unsigned int)EVP_CIPHER_key_length(c))))))
- {
- ERR_clear_error();
- if (is_export)
- i=ek;
- else
- i=EVP_CIPHER_key_length(c);
- if (RAND_pseudo_bytes(p,i) <= 0)
- return 0;
- }
-#else
- if (i < 0)
- {
- error=1;
- SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_BAD_RSA_DECRYPT);
- }
- /* incorrect number of key bytes for non export cipher */
- else if ((!is_export && (i != EVP_CIPHER_key_length(c)))
- || (is_export && ((i != ek) || (s->s2->tmp.clear+i !=
- EVP_CIPHER_key_length(c)))))
- {
- error=1;
- SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_WRONG_NUMBER_OF_KEY_BITS);
- }
- if (error)
- {
- ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
- return(-1);
- }
-#endif
+{
+ int is_export, i, n, keya, ek;
+ unsigned long len;
+ unsigned char *p;
+ const SSL_CIPHER *cp;
+ const EVP_CIPHER *c;
+ const EVP_MD *md;
+
+ p = (unsigned char *)s->init_buf->data;
+ if (s->state == SSL2_ST_GET_CLIENT_MASTER_KEY_A) {
+ i = ssl2_read(s, (char *)&(p[s->init_num]), 10 - s->init_num);
+
+ if (i < (10 - s->init_num))
+ return (ssl2_part_read(s, SSL_F_GET_CLIENT_MASTER_KEY, i));
+ s->init_num = 10;
+
+ if (*(p++) != SSL2_MT_CLIENT_MASTER_KEY) {
+ if (p[-1] != SSL2_MT_ERROR) {
+ ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
+ SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,
+ SSL_R_READ_WRONG_PACKET_TYPE);
+ } else
+ SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_PEER_ERROR);
+ return (-1);
+ }
+
+ cp = ssl2_get_cipher_by_char(p);
+ if (cp == NULL) {
+ ssl2_return_error(s, SSL2_PE_NO_CIPHER);
+ SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_NO_CIPHER_MATCH);
+ return (-1);
+ }
+ s->session->cipher = cp;
+
+ p += 3;
+ n2s(p, i);
+ s->s2->tmp.clear = i;
+ n2s(p, i);
+ s->s2->tmp.enc = i;
+ n2s(p, i);
+ if (i > SSL_MAX_KEY_ARG_LENGTH) {
+ ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
+ SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_KEY_ARG_TOO_LONG);
+ return -1;
+ }
+ s->session->key_arg_length = i;
+ s->state = SSL2_ST_GET_CLIENT_MASTER_KEY_B;
+ }
+
+ /* SSL2_ST_GET_CLIENT_MASTER_KEY_B */
+ p = (unsigned char *)s->init_buf->data;
+ if (s->init_buf->length < SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) {
+ ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
+ SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
+ return -1;
+ }
+ keya = s->session->key_arg_length;
+ len =
+ 10 + (unsigned long)s->s2->tmp.clear + (unsigned long)s->s2->tmp.enc +
+ (unsigned long)keya;
+ if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) {
+ ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
+ SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_MESSAGE_TOO_LONG);
+ return -1;
+ }
+ n = (int)len - s->init_num;
+ i = ssl2_read(s, (char *)&(p[s->init_num]), n);
+ if (i != n)
+ return (ssl2_part_read(s, SSL_F_GET_CLIENT_MASTER_KEY, i));
+ if (s->msg_callback) {
+ /* CLIENT-MASTER-KEY */
+ s->msg_callback(0, s->version, 0, p, (size_t)len, s,
+ s->msg_callback_arg);
+ }
+ p += 10;
+
+ memcpy(s->session->key_arg, &(p[s->s2->tmp.clear + s->s2->tmp.enc]),
+ (unsigned int)keya);
+
+ if (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL) {
+ ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
+ SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_NO_PRIVATEKEY);
+ return (-1);
+ }
+ i = ssl_rsa_private_decrypt(s->cert, s->s2->tmp.enc,
+ &(p[s->s2->tmp.clear]),
+ &(p[s->s2->tmp.clear]),
+ (s->s2->ssl2_rollback) ? RSA_SSLV23_PADDING :
+ RSA_PKCS1_PADDING);
+
+ is_export = SSL_C_IS_EXPORT(s->session->cipher);
+
+ if (!ssl_cipher_get_evp(s->session, &c, &md, NULL, NULL, NULL)) {
+ ssl2_return_error(s, SSL2_PE_NO_CIPHER);
+ SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,
+ SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
+ return (0);
+ }
+
+ if (s->session->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC) {
+ is_export = 1;
+ ek = 8;
+ } else
+ ek = 5;
+
+ /* bad decrypt */
+# if 1
+ /*
+ * If a bad decrypt, continue with protocol but with a random master
+ * secret (Bleichenbacher attack)
+ */
+ if ((i < 0) || ((!is_export && (i != EVP_CIPHER_key_length(c)))
+ || (is_export && ((i != ek)
+ || (s->s2->tmp.clear +
+ (unsigned int)i !=
+ (unsigned int)
+ EVP_CIPHER_key_length(c)))))) {
+ ERR_clear_error();
+ if (is_export)
+ i = ek;
+ else
+ i = EVP_CIPHER_key_length(c);
+ if (RAND_pseudo_bytes(p, i) <= 0)
+ return 0;
+ }
+# else
+ if (i < 0) {
+ error = 1;
+ SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_BAD_RSA_DECRYPT);
+ }
+ /* incorrect number of key bytes for non export cipher */
+ else if ((!is_export && (i != EVP_CIPHER_key_length(c)))
+ || (is_export && ((i != ek) || (s->s2->tmp.clear + i !=
+ EVP_CIPHER_key_length(c))))) {
+ error = 1;
+ SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_WRONG_NUMBER_OF_KEY_BITS);
+ }
+ if (error) {
+ ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
+ return (-1);
+ }
+# endif
- if (is_export) i+=s->s2->tmp.clear;
+ if (is_export)
+ i += s->s2->tmp.clear;
- if (i > SSL_MAX_MASTER_KEY_LENGTH)
- {
- ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
- SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
- return -1;
- }
- s->session->master_key_length=i;
- memcpy(s->session->master_key,p,(unsigned int)i);
- return(1);
- }
+ if (i > SSL_MAX_MASTER_KEY_LENGTH) {
+ ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
+ SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
+ return -1;
+ }
+ s->session->master_key_length = i;
+ memcpy(s->session->master_key, p, (unsigned int)i);
+ return (1);
+}
static int get_client_hello(SSL *s)
- {
- int i,n;
- unsigned long len;
- unsigned char *p;
- STACK_OF(SSL_CIPHER) *cs; /* a stack of SSL_CIPHERS */
- STACK_OF(SSL_CIPHER) *cl; /* the ones we want to use */
- STACK_OF(SSL_CIPHER) *prio, *allow;
- int z;
-
- /* This is a bit of a hack to check for the correct packet
- * type the first time round. */
- if (s->state == SSL2_ST_GET_CLIENT_HELLO_A)
- {
- s->first_packet=1;
- s->state=SSL2_ST_GET_CLIENT_HELLO_B;
- }
-
- p=(unsigned char *)s->init_buf->data;
- if (s->state == SSL2_ST_GET_CLIENT_HELLO_B)
- {
- i=ssl2_read(s,(char *)&(p[s->init_num]),9-s->init_num);
- if (i < (9-s->init_num))
- return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
- s->init_num = 9;
-
- if (*(p++) != SSL2_MT_CLIENT_HELLO)
- {
- if (p[-1] != SSL2_MT_ERROR)
- {
- ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
- SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_READ_WRONG_PACKET_TYPE);
- }
- else
- SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_PEER_ERROR);
- return(-1);
- }
- n2s(p,i);
- if (i < s->version) s->version=i;
- n2s(p,i); s->s2->tmp.cipher_spec_length=i;
- n2s(p,i); s->s2->tmp.session_id_length=i;
- n2s(p,i); s->s2->challenge_length=i;
- if ( (i < SSL2_MIN_CHALLENGE_LENGTH) ||
- (i > SSL2_MAX_CHALLENGE_LENGTH))
- {
- ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
- SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_INVALID_CHALLENGE_LENGTH);
- return(-1);
- }
- s->state=SSL2_ST_GET_CLIENT_HELLO_C;
- }
-
- /* SSL2_ST_GET_CLIENT_HELLO_C */
- p=(unsigned char *)s->init_buf->data;
- len = 9 + (unsigned long)s->s2->tmp.cipher_spec_length + (unsigned long)s->s2->challenge_length + (unsigned long)s->s2->tmp.session_id_length;
- if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
- {
- ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
- SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_MESSAGE_TOO_LONG);
- return -1;
- }
- n = (int)len - s->init_num;
- i = ssl2_read(s,(char *)&(p[s->init_num]),n);
- if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
- if (s->msg_callback)
- {
- /* CLIENT-HELLO */
- s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg);
- }
- p += 9;
-
- /* get session-id before cipher stuff so we can get out session
- * structure if it is cached */
- /* session-id */
- if ((s->s2->tmp.session_id_length != 0) &&
- (s->s2->tmp.session_id_length != SSL2_SSL_SESSION_ID_LENGTH))
- {
- ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
- SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_BAD_SSL_SESSION_ID_LENGTH);
- return(-1);
- }
-
- if (s->s2->tmp.session_id_length == 0)
- {
- if (!ssl_get_new_session(s,1))
- {
- ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
- return(-1);
- }
- }
- else
- {
- i=ssl_get_prev_session(s,&(p[s->s2->tmp.cipher_spec_length]),
- s->s2->tmp.session_id_length, NULL);
- if (i == 1)
- { /* previous session */
- s->hit=1;
- }
- else if (i == -1)
- {
- ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
- return(-1);
- }
- else
- {
- if (s->cert == NULL)
- {
- ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
- SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_NO_CERTIFICATE_SET);
- return(-1);
- }
-
- if (!ssl_get_new_session(s,1))
- {
- ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
- return(-1);
- }
- }
- }
-
- if (!s->hit)
- {
- cs=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.cipher_spec_length,
- &s->session->ciphers);
- if (cs == NULL) goto mem_err;
-
- cl=SSL_get_ciphers(s);
-
- if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
- {
- prio=sk_SSL_CIPHER_dup(cl);
- if (prio == NULL) goto mem_err;
- allow = cs;
- }
- else
- {
- prio = cs;
- allow = cl;
- }
- for (z=0; z<sk_SSL_CIPHER_num(prio); z++)
- {
- if (sk_SSL_CIPHER_find(allow,sk_SSL_CIPHER_value(prio,z)) < 0)
- {
- (void)sk_SSL_CIPHER_delete(prio,z);
- z--;
- }
- }
- if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
- {
- sk_SSL_CIPHER_free(s->session->ciphers);
- s->session->ciphers = prio;
- }
- /* s->session->ciphers should now have a list of
- * ciphers that are on both the client and server.
- * This list is ordered by the order the client sent
- * the ciphers or in the order of the server's preference
- * if SSL_OP_CIPHER_SERVER_PREFERENCE was set.
- */
- }
- p+=s->s2->tmp.cipher_spec_length;
- /* done cipher selection */
-
- /* session id extracted already */
- p+=s->s2->tmp.session_id_length;
-
- /* challenge */
- if (s->s2->challenge_length > sizeof s->s2->challenge)
- {
- ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
- SSLerr(SSL_F_GET_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
- return -1;
- }
- memcpy(s->s2->challenge,p,(unsigned int)s->s2->challenge_length);
- return(1);
-mem_err:
- SSLerr(SSL_F_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE);
- return(0);
- }
+{
+ int i, n;
+ unsigned long len;
+ unsigned char *p;
+ STACK_OF(SSL_CIPHER) *cs; /* a stack of SSL_CIPHERS */
+ STACK_OF(SSL_CIPHER) *cl; /* the ones we want to use */
+ STACK_OF(SSL_CIPHER) *prio, *allow;
+ int z;
+
+ /*
+ * This is a bit of a hack to check for the correct packet type the first
+ * time round.
+ */
+ if (s->state == SSL2_ST_GET_CLIENT_HELLO_A) {
+ s->first_packet = 1;
+ s->state = SSL2_ST_GET_CLIENT_HELLO_B;
+ }
+
+ p = (unsigned char *)s->init_buf->data;
+ if (s->state == SSL2_ST_GET_CLIENT_HELLO_B) {
+ i = ssl2_read(s, (char *)&(p[s->init_num]), 9 - s->init_num);
+ if (i < (9 - s->init_num))
+ return (ssl2_part_read(s, SSL_F_GET_CLIENT_HELLO, i));
+ s->init_num = 9;
+
+ if (*(p++) != SSL2_MT_CLIENT_HELLO) {
+ if (p[-1] != SSL2_MT_ERROR) {
+ ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
+ SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_READ_WRONG_PACKET_TYPE);
+ } else
+ SSLerr(SSL_F_GET_CLIENT_HELLO, SSL_R_PEER_ERROR);
+ return (-1);
+ }
+ n2s(p, i);
+ if (i < s->version)
+ s->version = i;
+ n2s(p, i);
+ s->s2->tmp.cipher_spec_length = i;
+ n2s(p, i);
+ s->s2->tmp.session_id_length = i;
+ n2s(p, i);
+ s->s2->challenge_length = i;
+ if ((i < SSL2_MIN_CHALLENGE_LENGTH) ||
+ (i > SSL2_MAX_CHALLENGE_LENGTH)) {
+ ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
+ SSLer