#include <openssl/evp.h>
#include <openssl/buffer.h>
#include <openssl/pqueue.h>
+#include <openssl/rand.h>
static int have_handshake_fragment(SSL *s, int type, unsigned char *buf,
int len, int peek);
static int dtls1_buffer_record(SSL *s, record_pqueue *q,
PQ_64BIT priority);
static int dtls1_process_record(SSL *s);
-#if !(defined(OPENSSL_SYS_VMS) || defined(VMS_TEST))
+#if PQ_64BIT_IS_INTEGER
static PQ_64BIT bytes_to_long_long(unsigned char *bytes, PQ_64BIT *num);
#endif
static void dtls1_clear_timeouts(SSL *s);
memset(&(s->s3->rbuf), 0, sizeof(SSL3_BUFFER));
memset(&(s->s3->rrec), 0, sizeof(SSL3_RECORD));
- ssl3_setup_buffers(s);
+ if (!ssl3_setup_buffers(s))
+ {
+ SSLerr(SSL_F_DTLS1_BUFFER_RECORD, ERR_R_INTERNAL_ERROR);
+ OPENSSL_free(rdata);
+ pitem_free(item);
+ return(0);
+ }
return(1);
}
SSL3_RECORD *rr;
SSL_SESSION *sess;
unsigned char *p;
- short version;
+ unsigned short version;
DTLS1_BITMAP *bitmap;
- unsigned int is_next_epoch;
+ unsigned int is_next_epoch;
rr= &(s->s3->rrec);
sess=s->session;
ssl_minor= *(p++);
version=(ssl_major<<8)|ssl_minor;
- /* sequence number is 64 bits, with top 2 bytes = epoch */
+ /* sequence number is 64 bits, with top 2 bytes = epoch */
n2s(p,rr->epoch);
memcpy(&(s->s3->read_sequence[2]), p, 6);
n2s(p,rr->length);
/* Lets check version */
- if (s->first_packet)
+ if (!s->first_packet)
{
- s->first_packet=0;
- }
- else
- {
- if (version != s->version)
+ if (version != s->version && version != DTLS1_BAD_VER)
{
SSLerr(SSL_F_DTLS1_GET_RECORD,SSL_R_WRONG_VERSION_NUMBER);
/* Send back error using their
}
}
- if ((version & 0xff00) != (DTLS1_VERSION & 0xff00))
+ if ((version & 0xff00) != (DTLS1_VERSION & 0xff00) &&
+ (version & 0xff00) != (DTLS1_BAD_VER & 0xff00))
{
SSLerr(SSL_F_DTLS1_GET_RECORD,SSL_R_WRONG_VERSION_NUMBER);
goto err;
goto f_err;
}
+ s->client_version = version;
/* now s->rstate == SSL_ST_READ_BODY */
}
/* check whether this is a repeat, or aged record */
if ( ! dtls1_record_replay_check(s, bitmap, &(rr->seq_num)))
{
+ rr->length = 0;
s->packet_length=0; /* dump this record */
goto again; /* get another record */
}
dest = s->d1->alert_fragment;
dest_len = &s->d1->alert_fragment_len;
}
- else /* else it's a CCS message */
- OPENSSL_assert(rr->type == SSL3_RT_CHANGE_CIPHER_SPEC);
+ /* else it's a CCS message, or it's wrong */
+ else if (rr->type != SSL3_RT_CHANGE_CIPHER_SPEC)
+ {
+ /* Not certain if this is the right error handling */
+ al=SSL_AD_UNEXPECTED_MESSAGE;
+ SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_UNEXPECTED_RECORD);
+ goto f_err;
+ }
if (dest_maxlen > 0)
* may be fragmented--don't always expect dest_maxlen bytes */
if ( rr->length < dest_maxlen)
{
+#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
+ /*
+ * for normal alerts rr->length is 2, while
+ * dest_maxlen is 7 if we were to handle this
+ * non-existing alert...
+ */
+ FIX ME
+#endif
s->rstate=SSL_ST_READ_HEADER;
rr->length = 0;
goto start;
}
if (rr->type == SSL3_RT_CHANGE_CIPHER_SPEC)
- {
- struct ccs_header_st ccs_hdr;
+ {
+ struct ccs_header_st ccs_hdr;
dtls1_get_ccs_header(rr->data, &ccs_hdr);
- if ( ccs_hdr.seq == s->d1->handshake_read_seq)
- {
- /* 'Change Cipher Spec' is just a single byte, so we know
- * exactly what the record payload has to look like */
- /* XDTLS: check that epoch is consistent */
- if ( (rr->length != DTLS1_CCS_HEADER_LENGTH) ||
- (rr->off != 0) || (rr->data[0] != SSL3_MT_CCS))
- {
- i=SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_BAD_CHANGE_CIPHER_SPEC);
- goto err;
- }
-
- rr->length=0;
-
- if (s->msg_callback)
- s->msg_callback(0, s->version, SSL3_RT_CHANGE_CIPHER_SPEC,
- rr->data, 1, s, s->msg_callback_arg);
-
- s->s3->change_cipher_spec=1;
- if (!ssl3_do_change_cipher_spec(s))
- goto err;
-
- /* do this whenever CCS is processed */
- dtls1_reset_seq_numbers(s, SSL3_CC_READ);
-
- /* handshake read seq is reset upon handshake completion */
- s->d1->handshake_read_seq++;
-
- goto start;
- }
- else
+ /* 'Change Cipher Spec' is just a single byte, so we know
+ * exactly what the record payload has to look like */
+ /* XDTLS: check that epoch is consistent */
+ if ( (s->client_version == DTLS1_BAD_VER && rr->length != 3) ||
+ (s->client_version != DTLS1_BAD_VER && rr->length != DTLS1_CCS_HEADER_LENGTH) ||
+ (rr->off != 0) || (rr->data[0] != SSL3_MT_CCS))
{
- rr->length = 0;
- goto start;
+ i=SSL_AD_ILLEGAL_PARAMETER;
+ SSLerr(SSL_F_DTLS1_READ_BYTES,SSL_R_BAD_CHANGE_CIPHER_SPEC);
+ goto err;
}
+
+ rr->length=0;
+
+ if (s->msg_callback)
+ s->msg_callback(0, s->version, SSL3_RT_CHANGE_CIPHER_SPEC,
+ rr->data, 1, s, s->msg_callback_arg);
+
+ s->s3->change_cipher_spec=1;
+ if (!ssl3_do_change_cipher_spec(s))
+ goto err;
+
+ /* do this whenever CCS is processed */
+ dtls1_reset_seq_numbers(s, SSL3_CC_READ);
+
+ if (s->client_version == DTLS1_BAD_VER)
+ s->d1->handshake_read_seq++;
+
+ goto start;
}
/* Unexpected handshake message (Client Hello, or protocol violation) */
else
s->s3->wnum += i;
- return tot + i;
+ return i;
}
int do_dtls1_write(SSL *s, int type, const unsigned char *buf, unsigned int len, int create_empty_fragment)
*(p++)=type&0xff;
wr->type=type;
- *(p++)=(s->version>>8);
- *(p++)=s->version&0xff;
+ if (s->client_version == DTLS1_BAD_VER)
+ *(p++) = DTLS1_BAD_VER>>8,
+ *(p++) = DTLS1_BAD_VER&0xff;
+ else
+ *(p++)=(s->version>>8),
+ *(p++)=s->version&0xff;
/* field where we are to write out packet epoch, seq num and len */
pseq=p;
/* ssl3_enc can only have an error on read */
- wr->length += bs; /* bs != 0 in case of CBC. The enc fn provides
- * the randomness */
+ if (bs) /* bs != 0 in case of CBC */
+ {
+ RAND_pseudo_bytes(p,bs);
+ /* master IV and last CBC residue stand for
+ * the rest of randomness */
+ wr->length += bs;
+ }
+
s->method->ssl3_enc->enc(s,1);
/* record length after mac and block padding */
static int dtls1_record_replay_check(SSL *s, DTLS1_BITMAP *bitmap,
PQ_64BIT *seq_num)
{
-#if !(defined(OPENSSL_SYS_VMS) || defined(VMS_TEST))
+#if PQ_64BIT_IS_INTEGER
PQ_64BIT mask = 0x0000000000000001L;
#endif
PQ_64BIT rcd_num, tmp;
return 0; /* stale, outside the window */
}
-#if (defined(OPENSSL_SYS_VMS) || defined(VMS_TEST))
+#if PQ_64BIT_IS_BIGNUM
{
int offset;
pq_64bit_sub(&tmp, &(bitmap->max_seq_num), &rcd_num);
{
int i,j;
void (*cb)(const SSL *ssl,int type,int val)=NULL;
- unsigned char buf[2 + 2 + 3]; /* alert level + alert desc + message seq +frag_off */
+ unsigned char buf[DTLS1_AL_HEADER_LENGTH];
unsigned char *ptr = &buf[0];
s->s3->alert_dispatch=0;
*ptr++ = s->s3->send_alert[0];
*ptr++ = s->s3->send_alert[1];
+#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
if (s->s3->send_alert[1] == DTLS1_AD_MISSING_HANDSHAKE_MESSAGE)
{
s2n(s->d1->handshake_read_seq, ptr);
#endif
l2n3(s->d1->r_msg_hdr.frag_off, ptr);
}
+#endif
i = do_dtls1_write(s, SSL3_RT_ALERT, &buf[0], sizeof(buf), 0);
if (i <= 0)
}
else
{
- if ( s->s3->send_alert[0] == SSL3_AL_FATAL ||
- s->s3->send_alert[1] == DTLS1_AD_MISSING_HANDSHAKE_MESSAGE)
+ if (s->s3->send_alert[0] == SSL3_AL_FATAL
+#ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
+ || s->s3->send_alert[1] == DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
+#endif
+ )
(void)BIO_flush(s->wbio);
if (s->msg_callback)
memset(seq, 0x00, seq_bytes);
}
-#if !(defined(OPENSSL_SYS_VMS) || defined(VMS_TEST))
+#if PQ_64BIT_IS_INTEGER
static PQ_64BIT
bytes_to_long_long(unsigned char *bytes, PQ_64BIT *num)
{
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