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OpenSSL 1.1.1-pre2

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Hakase
2018-04-07 17:29:40 +09:00
parent 82a44d2483
commit bbac8ca55d
17755 changed files with 221242 additions and 98415 deletions
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ssl/record/rec_layer_s3.c
+560 -379
View File
@@ -10,12 +10,12 @@
#include <stdio.h>
#include <limits.h>
#include <errno.h>
#define USE_SOCKETS
#include "../ssl_locl.h"
#include <openssl/evp.h>
#include <openssl/buffer.h>
#include <openssl/rand.h>
#include "record_locl.h"
#include "../packet_locl.h"
#if defined(OPENSSL_SMALL_FOOTPRINT) || \
!( defined(AES_ASM) && ( \
@@ -46,8 +46,6 @@ void RECORD_LAYER_clear(RECORD_LAYER *rl)
rl->packet = NULL;
rl->packet_length = 0;
rl->wnum = 0;
memset(rl->alert_fragment, 0, sizeof(rl->alert_fragment));
rl->alert_fragment_len = 0;
memset(rl->handshake_fragment, 0, sizeof(rl->handshake_fragment));
rl->handshake_fragment_len = 0;
rl->wpend_tot = 0;
@@ -100,22 +98,6 @@ int RECORD_LAYER_write_pending(const RECORD_LAYER *rl)
&& SSL3_BUFFER_get_left(&rl->wbuf[rl->numwpipes - 1]) != 0;
}
int RECORD_LAYER_set_data(RECORD_LAYER *rl, const unsigned char *buf, int len)
{
rl->packet_length = len;
if (len != 0) {
rl->rstate = SSL_ST_READ_HEADER;
if (!SSL3_BUFFER_is_initialised(&rl->rbuf))
if (!ssl3_setup_read_buffer(rl->s))
return 0;
}
rl->packet = SSL3_BUFFER_get_buf(&rl->rbuf);
SSL3_BUFFER_set_data(&rl->rbuf, buf, len);
return 1;
}
void RECORD_LAYER_reset_read_sequence(RECORD_LAYER *rl)
{
memset(rl->read_sequence, 0, sizeof(rl->read_sequence));
@@ -126,10 +108,9 @@ void RECORD_LAYER_reset_write_sequence(RECORD_LAYER *rl)
memset(rl->write_sequence, 0, sizeof(rl->write_sequence));
}
int ssl3_pending(const SSL *s)
size_t ssl3_pending(const SSL *s)
{
unsigned int i;
int num = 0;
size_t i, num = 0;
if (s->rlayer.rstate == SSL_ST_READ_BODY)
return 0;
@@ -185,7 +166,8 @@ const char *SSL_rstate_string(const SSL *s)
/*
* Return values are as per SSL_read()
*/
int ssl3_read_n(SSL *s, int n, int max, int extend, int clearold)
int ssl3_read_n(SSL *s, size_t n, size_t max, int extend, int clearold,
size_t *readbytes)
{
/*
* If extend == 0, obtain new n-byte packet; if extend == 1, increase
@@ -196,18 +178,19 @@ int ssl3_read_n(SSL *s, int n, int max, int extend, int clearold)
* if clearold == 1, move the packet to the start of the buffer; if
* clearold == 0 then leave any old packets where they were
*/
int i, len, left;
size_t align = 0;
size_t len, left, align = 0;
unsigned char *pkt;
SSL3_BUFFER *rb;
if (n <= 0)
return n;
if (n == 0)
return 0;
rb = &s->rlayer.rbuf;
if (rb->buf == NULL)
if (!ssl3_setup_read_buffer(s))
if (!ssl3_setup_read_buffer(s)) {
/* SSLfatal() already called */
return -1;
}
left = rb->left;
#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
@@ -272,13 +255,16 @@ int ssl3_read_n(SSL *s, int n, int max, int extend, int clearold)
s->rlayer.packet_length += n;
rb->left = left - n;
rb->offset += n;
return (n);
*readbytes = n;
return 1;
}
/* else we need to read more data */
if (n > (int)(rb->len - rb->offset)) { /* does not happen */
SSLerr(SSL_F_SSL3_READ_N, ERR_R_INTERNAL_ERROR);
if (n > rb->len - rb->offset) {
/* does not happen */
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_READ_N,
ERR_R_INTERNAL_ERROR);
return -1;
}
@@ -289,11 +275,14 @@ int ssl3_read_n(SSL *s, int n, int max, int extend, int clearold)
else {
if (max < n)
max = n;
if (max > (int)(rb->len - rb->offset))
if (max > rb->len - rb->offset)
max = rb->len - rb->offset;
}
while (left < n) {
size_t bioread = 0;
int ret;
/*
* Now we have len+left bytes at the front of s->s3->rbuf.buf and
* need to read in more until we have len+n (up to len+max if
@@ -303,20 +292,24 @@ int ssl3_read_n(SSL *s, int n, int max, int extend, int clearold)
clear_sys_error();
if (s->rbio != NULL) {
s->rwstate = SSL_READING;
i = BIO_read(s->rbio, pkt + len + left, max - left);
/* TODO(size_t): Convert this function */
ret = BIO_read(s->rbio, pkt + len + left, max - left);
if (ret >= 0)
bioread = ret;
} else {
SSLerr(SSL_F_SSL3_READ_N, SSL_R_READ_BIO_NOT_SET);
i = -1;
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_READ_N,
SSL_R_READ_BIO_NOT_SET);
ret = -1;
}
if (i <= 0) {
if (ret <= 0) {
rb->left = left;
if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s))
if (len + left == 0)
ssl3_release_read_buffer(s);
return i;
return ret;
}
left += i;
left += bioread;
/*
* reads should *never* span multiple packets for DTLS because the
* underlying transport protocol is message oriented as opposed to
@@ -333,55 +326,65 @@ int ssl3_read_n(SSL *s, int n, int max, int extend, int clearold)
rb->left = left - n;
s->rlayer.packet_length += n;
s->rwstate = SSL_NOTHING;
return (n);
*readbytes = n;
return 1;
}
/*
* Call this to write data in records of type 'type' It will return <= 0 if
* not all data has been sent or non-blocking IO.
*/
int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len)
int ssl3_write_bytes(SSL *s, int type, const void *buf_, size_t len,
size_t *written)
{
const unsigned char *buf = buf_;
int tot;
unsigned int n, split_send_fragment, maxpipes;
size_t tot;
size_t n, max_send_fragment, split_send_fragment, maxpipes;
#if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
unsigned int max_send_fragment, nw;
unsigned int u_len = (unsigned int)len;
size_t nw;
#endif
SSL3_BUFFER *wb = &s->rlayer.wbuf[0];
int i;
if (len < 0) {
SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_SSL_NEGATIVE_LENGTH);
return -1;
}
size_t tmpwrit;
s->rwstate = SSL_NOTHING;
tot = s->rlayer.wnum;
/*
* ensure that if we end up with a smaller value of data to write out
* than the the original len from a write which didn't complete for
* than the original len from a write which didn't complete for
* non-blocking I/O and also somehow ended up avoiding the check for
* this in ssl3_write_pending/SSL_R_BAD_WRITE_RETRY as it must never be
* possible to end up with (len-tot) as a large number that will then
* promptly send beyond the end of the users buffer ... so we trap and
* report the error in a way the user will notice
*/
if (((unsigned int)len < s->rlayer.wnum)
|| ((wb->left != 0) && ((unsigned int)len < (s->rlayer.wnum + s->rlayer.wpend_tot)))) {
SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_BAD_LENGTH);
if ((len < s->rlayer.wnum)
|| ((wb->left != 0) && (len < (s->rlayer.wnum + s->rlayer.wpend_tot)))) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_WRITE_BYTES,
SSL_R_BAD_LENGTH);
return -1;
}
if (s->early_data_state == SSL_EARLY_DATA_WRITING
&& !early_data_count_ok(s, len, 0, 1)) {
/* SSLfatal() already called */
return -1;
}
s->rlayer.wnum = 0;
if (SSL_in_init(s) && !ossl_statem_get_in_handshake(s)) {
/*
* When writing early data on the server side we could be "in_init" in
* between receiving the EoED and the CF - but we don't want to handle those
* messages yet.
*/
if (SSL_in_init(s) && !ossl_statem_get_in_handshake(s)
&& s->early_data_state != SSL_EARLY_DATA_UNAUTH_WRITING) {
i = s->handshake_func(s);
/* SSLfatal() already called */
if (i < 0)
return (i);
return i;
if (i == 0) {
SSLerr(SSL_F_SSL3_WRITE_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE);
return -1;
}
}
@@ -391,13 +394,15 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len)
* will happen with non blocking IO
*/
if (wb->left != 0) {
i = ssl3_write_pending(s, type, &buf[tot], s->rlayer.wpend_tot);
/* SSLfatal() already called if appropriate */
i = ssl3_write_pending(s, type, &buf[tot], s->rlayer.wpend_tot,
&tmpwrit);
if (i <= 0) {
/* XXX should we ssl3_release_write_buffer if i<0? */
s->rlayer.wnum = tot;
return i;
}
tot += i; /* this might be last fragment */
tot += tmpwrit; /* this might be last fragment */
}
#if !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK
/*
@@ -407,14 +412,15 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len)
* compromise is considered worthy.
*/
if (type == SSL3_RT_APPLICATION_DATA &&
u_len >= 4 * (max_send_fragment = s->max_send_fragment) &&
len >= 4 * (max_send_fragment = ssl_get_max_send_fragment(s)) &&
s->compress == NULL && s->msg_callback == NULL &&
!SSL_WRITE_ETM(s) && SSL_USE_EXPLICIT_IV(s) &&
EVP_CIPHER_flags(EVP_CIPHER_CTX_cipher(s->enc_write_ctx)) &
EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK) {
unsigned char aad[13];
EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM mb_param;
int packlen;
size_t packlen;
int packleni;
/* minimize address aliasing conflicts */
if ((max_send_fragment & 0xfff) == 0)
@@ -425,21 +431,22 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len)
packlen = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx,
EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE,
max_send_fragment, NULL);
(int)max_send_fragment, NULL);
if (u_len >= 8 * max_send_fragment)
if (len >= 8 * max_send_fragment)
packlen *= 8;
else
packlen *= 4;
if (!ssl3_setup_write_buffer(s, 1, packlen)) {
SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_MALLOC_FAILURE);
/* SSLfatal() already called */
return -1;
}
} else if (tot == len) { /* done? */
/* free jumbo buffer */
ssl3_release_write_buffer(s);
return tot;
*written = tot;
return 1;
}
n = (len - tot);
@@ -453,6 +460,7 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len)
if (s->s3->alert_dispatch) {
i = s->method->ssl_dispatch_alert(s);
if (i <= 0) {
/* SSLfatal() already called if appropriate */
s->rlayer.wnum = tot;
return i;
}
@@ -473,11 +481,11 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len)
mb_param.inp = aad;
mb_param.len = nw;
packlen = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx,
packleni = EVP_CIPHER_CTX_ctrl(s->enc_write_ctx,
EVP_CTRL_TLS1_1_MULTIBLOCK_AAD,
sizeof(mb_param), &mb_param);
if (packlen <= 0 || packlen > (int)wb->len) { /* never happens */
packlen = (size_t)packleni;
if (packleni <= 0 || packlen > wb->len) { /* never happens */
/* free jumbo buffer */
ssl3_release_write_buffer(s);
break;
@@ -506,8 +514,9 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len)
s->rlayer.wpend_type = type;
s->rlayer.wpend_ret = nw;
i = ssl3_write_pending(s, type, &buf[tot], nw);
i = ssl3_write_pending(s, type, &buf[tot], nw, &tmpwrit);
if (i <= 0) {
/* SSLfatal() already called if appropriate */
if (i < 0 && (!s->wbio || !BIO_should_retry(s->wbio))) {
/* free jumbo buffer */
ssl3_release_write_buffer(s);
@@ -515,26 +524,29 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len)
s->rlayer.wnum = tot;
return i;
}
if (i == (int)n) {
if (tmpwrit == n) {
/* free jumbo buffer */
ssl3_release_write_buffer(s);
return tot + i;
*written = tot + tmpwrit;
return 1;
}
n -= i;
tot += i;
n -= tmpwrit;
tot += tmpwrit;
}
} else
#endif
#endif /* !defined(OPENSSL_NO_MULTIBLOCK) && EVP_CIPH_FLAG_TLS1_1_MULTIBLOCK */
if (tot == len) { /* done? */
if (s->mode & SSL_MODE_RELEASE_BUFFERS && !SSL_IS_DTLS(s))
ssl3_release_write_buffer(s);
return tot;
*written = tot;
return 1;
}
n = (len - tot);
split_send_fragment = s->split_send_fragment;
max_send_fragment = ssl_get_max_send_fragment(s);
split_send_fragment = ssl_get_split_send_fragment(s);
/*
* If max_pipelines is 0 then this means "undefined" and we default to
* 1 pipeline. Similarly if the cipher does not support pipelined
@@ -547,7 +559,8 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len)
* We should have prevented this when we set max_pipelines so we
* shouldn't get here
*/
SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_INTERNAL_ERROR);
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_WRITE_BYTES,
ERR_R_INTERNAL_ERROR);
return -1;
}
if (maxpipes == 0
@@ -556,19 +569,20 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len)
& EVP_CIPH_FLAG_PIPELINE)
|| !SSL_USE_EXPLICIT_IV(s))
maxpipes = 1;
if (s->max_send_fragment == 0 || split_send_fragment > s->max_send_fragment
|| split_send_fragment == 0) {
if (max_send_fragment == 0 || split_send_fragment == 0
|| split_send_fragment > max_send_fragment) {
/*
* We should have prevented this when we set the split and max send
* We should have prevented this when we set/get the split and max send
* fragments so we shouldn't get here
*/
SSLerr(SSL_F_SSL3_WRITE_BYTES, ERR_R_INTERNAL_ERROR);
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_WRITE_BYTES,
ERR_R_INTERNAL_ERROR);
return -1;
}
for (;;) {
unsigned int pipelens[SSL_MAX_PIPELINES], tmppipelen, remain;
unsigned int numpipes, j;
size_t pipelens[SSL_MAX_PIPELINES], tmppipelen, remain;
size_t numpipes, j;
if (n == 0)
numpipes = 1;
@@ -577,13 +591,13 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len)
if (numpipes > maxpipes)
numpipes = maxpipes;
if (n / numpipes >= s->max_send_fragment) {
if (n / numpipes >= max_send_fragment) {
/*
* We have enough data to completely fill all available
* pipelines
*/
for (j = 0; j < numpipes; j++) {
pipelens[j] = s->max_send_fragment;
pipelens[j] = max_send_fragment;
}
} else {
/* We can partially fill all available pipelines */
@@ -596,14 +610,16 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len)
}
}
i = do_ssl3_write(s, type, &(buf[tot]), pipelens, numpipes, 0);
i = do_ssl3_write(s, type, &(buf[tot]), pipelens, numpipes, 0,
&tmpwrit);
if (i <= 0) {
/* SSLfatal() already called if appropriate */
/* XXX should we ssl3_release_write_buffer if i<0? */
s->rlayer.wnum = tot;
return i;
}
if ((i == (int)n) ||
if (tmpwrit == n ||
(type == SSL3_RT_APPLICATION_DATA &&
(s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE))) {
/*
@@ -616,28 +632,32 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len)
!SSL_IS_DTLS(s))
ssl3_release_write_buffer(s);
return tot + i;
*written = tot + tmpwrit;
return 1;
}
n -= i;
tot += i;
n -= tmpwrit;
tot += tmpwrit;
}
}
int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
unsigned int *pipelens, unsigned int numpipes,
int create_empty_fragment)
size_t *pipelens, size_t numpipes,
int create_empty_fragment, size_t *written)
{
unsigned char *outbuf[SSL_MAX_PIPELINES], *plen[SSL_MAX_PIPELINES];
WPACKET pkt[SSL_MAX_PIPELINES];
SSL3_RECORD wr[SSL_MAX_PIPELINES];
WPACKET *thispkt;
SSL3_RECORD *thiswr;
unsigned char *recordstart;
int i, mac_size, clear = 0;
int prefix_len = 0;
int eivlen;
size_t prefix_len = 0;
int eivlen = 0;
size_t align = 0;
SSL3_BUFFER *wb;
SSL_SESSION *sess;
unsigned int totlen = 0;
unsigned int j;
size_t totlen = 0, len, wpinited = 0;
size_t j;
for (j = 0; j < numpipes; j++)
totlen += pipelens[j];
@@ -645,20 +665,27 @@ int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
* first check if there is a SSL3_BUFFER still being written out. This
* will happen with non blocking IO
*/
if (RECORD_LAYER_write_pending(&s->rlayer))
return (ssl3_write_pending(s, type, buf, totlen));
if (RECORD_LAYER_write_pending(&s->rlayer)) {
/* Calls SSLfatal() as required */
return ssl3_write_pending(s, type, buf, totlen, written);
}
/* If we have an alert to send, lets send it */
if (s->s3->alert_dispatch) {
i = s->method->ssl_dispatch_alert(s);
if (i <= 0)
return (i);
if (i <= 0) {
/* SSLfatal() already called if appropriate */
return i;
}
/* if it went, fall through and send more stuff */
}
if (s->rlayer.numwpipes < numpipes)
if (!ssl3_setup_write_buffer(s, numpipes, 0))
if (s->rlayer.numwpipes < numpipes) {
if (!ssl3_setup_write_buffer(s, numpipes, 0)) {
/* SSLfatal() already called */
return -1;
}
}
if (totlen == 0 && !create_empty_fragment)
return 0;
@@ -670,9 +697,13 @@ int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
clear = s->enc_write_ctx ? 0 : 1; /* must be AEAD cipher */
mac_size = 0;
} else {
/* TODO(siz_t): Convert me */
mac_size = EVP_MD_CTX_size(s->write_hash);
if (mac_size < 0)
if (mac_size < 0) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE,
ERR_R_INTERNAL_ERROR);
goto err;
}
}
/*
@@ -691,16 +722,20 @@ int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
* 'prefix_len' bytes are sent out later together with the actual
* payload)
*/
unsigned int tmppipelen = 0;
size_t tmppipelen = 0;
int ret;
prefix_len = do_ssl3_write(s, type, buf, &tmppipelen, 1, 1);
if (prefix_len <= 0)
ret = do_ssl3_write(s, type, buf, &tmppipelen, 1, 1, &prefix_len);
if (ret <= 0) {
/* SSLfatal() already called if appropriate */
goto err;
}
if (prefix_len >
(SSL3_RT_HEADER_LENGTH + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD)) {
/* insufficient space */
SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR);
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE,
ERR_R_INTERNAL_ERROR);
goto err;
}
}
@@ -719,136 +754,318 @@ int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
align = (size_t)SSL3_BUFFER_get_buf(wb) + 2 * SSL3_RT_HEADER_LENGTH;
align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD);
#endif
outbuf[0] = SSL3_BUFFER_get_buf(wb) + align;
SSL3_BUFFER_set_offset(wb, align);
if (!WPACKET_init_static_len(&pkt[0], SSL3_BUFFER_get_buf(wb),
SSL3_BUFFER_get_len(wb), 0)
|| !WPACKET_allocate_bytes(&pkt[0], align, NULL)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE,
ERR_R_INTERNAL_ERROR);
goto err;
}
wpinited = 1;
} else if (prefix_len) {
wb = &s->rlayer.wbuf[0];
outbuf[0] = SSL3_BUFFER_get_buf(wb) + SSL3_BUFFER_get_offset(wb)
+ prefix_len;
if (!WPACKET_init_static_len(&pkt[0],
SSL3_BUFFER_get_buf(wb),
SSL3_BUFFER_get_len(wb), 0)
|| !WPACKET_allocate_bytes(&pkt[0], SSL3_BUFFER_get_offset(wb)
+ prefix_len, NULL)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE,
ERR_R_INTERNAL_ERROR);
goto err;
}
wpinited = 1;
} else {
for (j = 0; j < numpipes; j++) {
thispkt = &pkt[j];
wb = &s->rlayer.wbuf[j];
#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD != 0
align = (size_t)SSL3_BUFFER_get_buf(wb) + SSL3_RT_HEADER_LENGTH;
align = SSL3_ALIGN_PAYLOAD - 1 - ((align - 1) % SSL3_ALIGN_PAYLOAD);
#endif
outbuf[j] = SSL3_BUFFER_get_buf(wb) + align;
SSL3_BUFFER_set_offset(wb, align);
if (!WPACKET_init_static_len(thispkt, SSL3_BUFFER_get_buf(wb),
SSL3_BUFFER_get_len(wb), 0)
|| !WPACKET_allocate_bytes(thispkt, align, NULL)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE,
ERR_R_INTERNAL_ERROR);
goto err;
}
wpinited++;
}
}
/* Explicit IV length, block ciphers appropriate version flag */
if (s->enc_write_ctx && SSL_USE_EXPLICIT_IV(s)) {
if (s->enc_write_ctx && SSL_USE_EXPLICIT_IV(s) && !SSL_TREAT_AS_TLS13(s)) {
int mode = EVP_CIPHER_CTX_mode(s->enc_write_ctx);
if (mode == EVP_CIPH_CBC_MODE) {
/* TODO(size_t): Convert me */
eivlen = EVP_CIPHER_CTX_iv_length(s->enc_write_ctx);
if (eivlen <= 1)
eivlen = 0;
}
/* Need explicit part of IV for GCM mode */
else if (mode == EVP_CIPH_GCM_MODE)
} else if (mode == EVP_CIPH_GCM_MODE) {
/* Need explicit part of IV for GCM mode */
eivlen = EVP_GCM_TLS_EXPLICIT_IV_LEN;
else if (mode == EVP_CIPH_CCM_MODE)
} else if (mode == EVP_CIPH_CCM_MODE) {
eivlen = EVP_CCM_TLS_EXPLICIT_IV_LEN;
else
eivlen = 0;
} else
eivlen = 0;
}
}
totlen = 0;
/* Clear our SSL3_RECORD structures */
memset(wr, 0, sizeof(wr));
for (j = 0; j < numpipes; j++) {
/* write the header */
*(outbuf[j]++) = type & 0xff;
SSL3_RECORD_set_type(&wr[j], type);
unsigned int version = SSL_TREAT_AS_TLS13(s) ? TLS1_2_VERSION
: s->version;
unsigned char *compressdata = NULL;
size_t maxcomplen;
unsigned int rectype;
*(outbuf[j]++) = (s->version >> 8);
thispkt = &pkt[j];
thiswr = &wr[j];
SSL3_RECORD_set_type(thiswr, type);
/*
* In TLSv1.3, once encrypting, we always use application data for the
* record type
*/
if (SSL_TREAT_AS_TLS13(s) && s->enc_write_ctx != NULL)
rectype = SSL3_RT_APPLICATION_DATA;
else
rectype = type;
/*
* Some servers hang if initial client hello is larger than 256 bytes
* and record version number > TLS 1.0
*/
if (SSL_get_state(s) == TLS_ST_CW_CLNT_HELLO
&& !s->renegotiate && TLS1_get_version(s) > TLS1_VERSION)
*(outbuf[j]++) = 0x1;
else
*(outbuf[j]++) = s->version & 0xff;
&& !s->renegotiate
&& TLS1_get_version(s) > TLS1_VERSION
&& s->hello_retry_request == SSL_HRR_NONE)
version = TLS1_VERSION;
/* field where we are to write out packet length */
plen[j] = outbuf[j];
outbuf[j] += 2;
maxcomplen = pipelens[j];
if (s->compress != NULL)
maxcomplen += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
/* write the header */
if (!WPACKET_put_bytes_u8(thispkt, rectype)
|| !WPACKET_put_bytes_u16(thispkt, version)
|| !WPACKET_start_sub_packet_u16(thispkt)
|| (eivlen > 0
&& !WPACKET_allocate_bytes(thispkt, eivlen, NULL))
|| (maxcomplen > 0
&& !WPACKET_reserve_bytes(thispkt, maxcomplen,
&compressdata))) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE,
ERR_R_INTERNAL_ERROR);
goto err;
}
/* lets setup the record stuff. */
SSL3_RECORD_set_data(&wr[j], outbuf[j] + eivlen);
SSL3_RECORD_set_length(&wr[j], (int)pipelens[j]);
SSL3_RECORD_set_input(&wr[j], (unsigned char *)&buf[totlen]);
SSL3_RECORD_set_data(thiswr, compressdata);
SSL3_RECORD_set_length(thiswr, pipelens[j]);
SSL3_RECORD_set_input(thiswr, (unsigned char *)&buf[totlen]);
totlen += pipelens[j];
/*
* we now 'read' from wr->input, wr->length bytes into wr->data
* we now 'read' from thiswr->input, thiswr->length bytes into
* thiswr->data
*/
/* first we compress */
if (s->compress != NULL) {
if (!ssl3_do_compress(s, &wr[j])) {
SSLerr(SSL_F_DO_SSL3_WRITE, SSL_R_COMPRESSION_FAILURE);
if (!ssl3_do_compress(s, thiswr)
|| !WPACKET_allocate_bytes(thispkt, thiswr->length, NULL)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE,
SSL_R_COMPRESSION_FAILURE);
goto err;
}
} else {
memcpy(wr[j].data, wr[j].input, wr[j].length);
if (!WPACKET_memcpy(thispkt, thiswr->input, thiswr->length)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE,
ERR_R_INTERNAL_ERROR);
goto err;
}
SSL3_RECORD_reset_input(&wr[j]);
}
if (SSL_TREAT_AS_TLS13(s) && s->enc_write_ctx != NULL) {
size_t rlen, max_send_fragment;
if (!WPACKET_put_bytes_u8(thispkt, type)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE,
ERR_R_INTERNAL_ERROR);
goto err;
}
SSL3_RECORD_add_length(thiswr, 1);
/* Add TLS1.3 padding */
max_send_fragment = ssl_get_max_send_fragment(s);
rlen = SSL3_RECORD_get_length(thiswr);
if (rlen < max_send_fragment) {
size_t padding = 0;
size_t max_padding = max_send_fragment - rlen;
if (s->record_padding_cb != NULL) {
padding = s->record_padding_cb(s, type, rlen, s->record_padding_arg);
} else if (s->block_padding > 0) {
size_t mask = s->block_padding - 1;
size_t remainder;
/* optimize for power of 2 */
if ((s->block_padding & mask) == 0)
remainder = rlen & mask;
else
remainder = rlen % s->block_padding;
/* don't want to add a block of padding if we don't have to */
if (remainder == 0)
padding = 0;
else
padding = s->block_padding - remainder;
}
if (padding > 0) {
/* do not allow the record to exceed max plaintext length */
if (padding > max_padding)
padding = max_padding;
if (!WPACKET_memset(thispkt, 0, padding)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE,
ERR_R_INTERNAL_ERROR);
goto err;
}
SSL3_RECORD_add_length(thiswr, padding);
}
}
}
/*
* we should still have the output to wr->data and the input from
* wr->input. Length should be wr->length. wr->data still points in the
* wb->buf
* we should still have the output to thiswr->data and the input from
* wr->input. Length should be thiswr->length. thiswr->data still points
* in the wb->buf
*/
if (!SSL_WRITE_ETM(s) && mac_size != 0) {
if (s->method->ssl3_enc->mac(s, &wr[j],
&(outbuf[j][wr[j].length + eivlen]),
1) < 0)
unsigned char *mac;
if (!WPACKET_allocate_bytes(thispkt, mac_size, &mac)
|| !s->method->ssl3_enc->mac(s, thiswr, mac, 1)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE,
ERR_R_INTERNAL_ERROR);
goto err;
SSL3_RECORD_add_length(&wr[j], mac_size);
}
}
SSL3_RECORD_set_data(&wr[j], outbuf[j]);
SSL3_RECORD_reset_input(&wr[j]);
/*
* Reserve some bytes for any growth that may occur during encryption.
* This will be at most one cipher block or the tag length if using
* AEAD. SSL_RT_MAX_CIPHER_BLOCK_SIZE covers either case.
*/
if (!WPACKET_reserve_bytes(thispkt, SSL_RT_MAX_CIPHER_BLOCK_SIZE,
NULL)
/*
* We also need next the amount of bytes written to this
* sub-packet
*/
|| !WPACKET_get_length(thispkt, &len)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE,
ERR_R_INTERNAL_ERROR);
goto err;
}
if (eivlen) {
/*
* if (RAND_pseudo_bytes(p, eivlen) <= 0) goto err;
*/
SSL3_RECORD_add_length(&wr[j], eivlen);
/* Get a pointer to the start of this record excluding header */
recordstart = WPACKET_get_curr(thispkt) - len;
SSL3_RECORD_set_data(thiswr, recordstart);
SSL3_RECORD_reset_input(thiswr);
SSL3_RECORD_set_length(thiswr, len);
}
if (s->early_data_state == SSL_EARLY_DATA_WRITING
|| s->early_data_state == SSL_EARLY_DATA_WRITE_RETRY) {
/*
* We haven't actually negotiated the version yet, but we're trying to
* send early data - so we need to use the tls13enc function.
*/
if (tls13_enc(s, wr, numpipes, 1) < 1) {
if (!ossl_statem_in_error(s)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE,
ERR_R_INTERNAL_ERROR);
}
goto err;
}
} else {
if (s->method->ssl3_enc->enc(s, wr, numpipes, 1) < 1) {
if (!ossl_statem_in_error(s)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE,
ERR_R_INTERNAL_ERROR);
}
goto err;
}
}
if (s->method->ssl3_enc->enc(s, wr, numpipes, 1) < 1)
goto err;
for (j = 0; j < numpipes; j++) {
size_t origlen;
thispkt = &pkt[j];
thiswr = &wr[j];
/* Allocate bytes for the encryption overhead */
if (!WPACKET_get_length(thispkt, &origlen)
/* Encryption should never shrink the data! */
|| origlen > thiswr->length
|| (thiswr->length > origlen
&& !WPACKET_allocate_bytes(thispkt,
thiswr->length - origlen, NULL))) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE,
ERR_R_INTERNAL_ERROR);
goto err;
}
if (SSL_WRITE_ETM(s) && mac_size != 0) {
if (s->method->ssl3_enc->mac(s, &wr[j],
outbuf[j] + wr[j].length, 1) < 0)
unsigned char *mac;
if (!WPACKET_allocate_bytes(thispkt, mac_size, &mac)
|| !s->method->ssl3_enc->mac(s, thiswr, mac, 1)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE,
ERR_R_INTERNAL_ERROR);
goto err;
SSL3_RECORD_add_length(&wr[j], mac_size);
}
SSL3_RECORD_add_length(thiswr, mac_size);
}
/* record length after mac and block padding */
s2n(SSL3_RECORD_get_length(&wr[j]), plen[j]);
if (!WPACKET_get_length(thispkt, &len)
|| !WPACKET_close(thispkt)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE,
ERR_R_INTERNAL_ERROR);
goto err;
}
if (s->msg_callback)
s->msg_callback(1, 0, SSL3_RT_HEADER, plen[j] - 5, 5, s,
if (s->msg_callback) {
recordstart = WPACKET_get_curr(thispkt) - len
- SSL3_RT_HEADER_LENGTH;
s->msg_callback(1, 0, SSL3_RT_HEADER, recordstart,
SSL3_RT_HEADER_LENGTH, s,
s->msg_callback_arg);
if (SSL_TREAT_AS_TLS13(s) && s->enc_write_ctx != NULL) {
unsigned char ctype = type;
s->msg_callback(1, s->version, SSL3_RT_INNER_CONTENT_TYPE,
&ctype, 1, s, s->msg_callback_arg);
}
}
if (!WPACKET_finish(thispkt)) {
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE,
ERR_R_INTERNAL_ERROR);
goto err;
}
/*
* we should now have wr->data pointing to the encrypted data, which is
* wr->length long
* we should now have thiswr->data pointing to the encrypted data, which
* is thiswr->length long
*/
SSL3_RECORD_set_type(&wr[j], type); /* not needed but helps for
SSL3_RECORD_set_type(thiswr, type); /* not needed but helps for
* debugging */
SSL3_RECORD_add_length(&wr[j], SSL3_RT_HEADER_LENGTH);
SSL3_RECORD_add_length(thiswr, SSL3_RT_HEADER_LENGTH);
if (create_empty_fragment) {
/*
@@ -857,15 +1074,17 @@ int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
*/
if (j > 0) {
/* We should never be pipelining an empty fragment!! */
SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR);
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_DO_SSL3_WRITE,
ERR_R_INTERNAL_ERROR);
goto err;
}
return SSL3_RECORD_get_length(wr);
*written = SSL3_RECORD_get_length(thiswr);
return 1;
}
/* now let's set up wb */
SSL3_BUFFER_set_left(&s->rlayer.wbuf[j],
prefix_len + SSL3_RECORD_get_length(&wr[j]));
prefix_len + SSL3_RECORD_get_length(thiswr));
}
/*
@@ -878,8 +1097,10 @@ int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
s->rlayer.wpend_ret = totlen;
/* we now just need to write the buffer */
return ssl3_write_pending(s, type, buf, totlen);
return ssl3_write_pending(s, type, buf, totlen, written);
err:
for (j = 0; j < wpinited; j++)
WPACKET_cleanup(&pkt[j]);
return -1;
}
@@ -887,19 +1108,21 @@ int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
*
* Return values are as per SSL_write()
*/
int ssl3_write_pending(SSL *s, int type, const unsigned char *buf,
unsigned int len)
int ssl3_write_pending(SSL *s, int type, const unsigned char *buf, size_t len,
size_t *written)
{
int i;
SSL3_BUFFER *wb = s->rlayer.wbuf;
unsigned int currbuf = 0;
size_t currbuf = 0;
size_t tmpwrit = 0;
if ((s->rlayer.wpend_tot > (int)len)
if ((s->rlayer.wpend_tot > len)
|| (!(s->mode & SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER)
&& (s->rlayer.wpend_buf != buf))
|| (s->rlayer.wpend_type != type)) {
SSLerr(SSL_F_SSL3_WRITE_PENDING, SSL_R_BAD_WRITE_RETRY);
return (-1);
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_WRITE_PENDING,
SSL_R_BAD_WRITE_RETRY);
return -1;
}
for (;;) {
@@ -912,21 +1135,26 @@ int ssl3_write_pending(SSL *s, int type, const unsigned char *buf,
clear_sys_error();
if (s->wbio != NULL) {
s->rwstate = SSL_WRITING;
/* TODO(size_t): Convert this call */
i = BIO_write(s->wbio, (char *)
&(SSL3_BUFFER_get_buf(&wb[currbuf])
[SSL3_BUFFER_get_offset(&wb[currbuf])]),
(unsigned int)SSL3_BUFFER_get_left(&wb[currbuf]));
if (i >= 0)
tmpwrit = i;
} else {
SSLerr(SSL_F_SSL3_WRITE_PENDING, SSL_R_BIO_NOT_SET);
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_WRITE_PENDING,
SSL_R_BIO_NOT_SET);
i = -1;
}
if (i == SSL3_BUFFER_get_left(&wb[currbuf])) {
if (i > 0 && tmpwrit == SSL3_BUFFER_get_left(&wb[currbuf])) {
SSL3_BUFFER_set_left(&wb[currbuf], 0);
SSL3_BUFFER_add_offset(&wb[currbuf], i);
SSL3_BUFFER_add_offset(&wb[currbuf], tmpwrit);
if (currbuf + 1 < s->rlayer.numwpipes)
continue;
s->rwstate = SSL_NOTHING;
return (s->rlayer.wpend_ret);
*written = s->rlayer.wpend_ret;
return 1;
} else if (i <= 0) {
if (SSL_IS_DTLS(s)) {
/*
@@ -937,8 +1165,8 @@ int ssl3_write_pending(SSL *s, int type, const unsigned char *buf,
}
return i;
}
SSL3_BUFFER_add_offset(&wb[currbuf], i);
SSL3_BUFFER_add_left(&wb[currbuf], -i);
SSL3_BUFFER_add_offset(&wb[currbuf], tmpwrit);
SSL3_BUFFER_sub_left(&wb[currbuf], tmpwrit);
}
}
@@ -972,10 +1200,10 @@ int ssl3_write_pending(SSL *s, int type, const unsigned char *buf,
* none of our business
*/
int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
int len, int peek)
size_t len, int peek, size_t *readbytes)
{
int al, i, j, ret;
unsigned int n, curr_rec, num_recs, read_bytes;
int i, j, ret;
size_t n, curr_rec, num_recs, totalbytes;
SSL3_RECORD *rr;
SSL3_BUFFER *rbuf;
void (*cb) (const SSL *ssl, int type2, int val) = NULL;
@@ -984,15 +1212,18 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
if (!SSL3_BUFFER_is_initialised(rbuf)) {
/* Not initialized yet */
if (!ssl3_setup_read_buffer(s))
return (-1);
if (!ssl3_setup_read_buffer(s)) {
/* SSLfatal() already called */
return -1;
}
}
if ((type && (type != SSL3_RT_APPLICATION_DATA)
&& (type != SSL3_RT_HANDSHAKE)) || (peek
&& (type !=
SSL3_RT_APPLICATION_DATA))) {
SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR);
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_READ_BYTES,
ERR_R_INTERNAL_ERROR);
return -1;
}
@@ -1018,7 +1249,8 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
if (recvd_type != NULL)
*recvd_type = SSL3_RT_HANDSHAKE;
return n;
*readbytes = n;
return 1;
}
/*
@@ -1028,12 +1260,11 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
if (!ossl_statem_get_in_handshake(s) && SSL_in_init(s)) {
/* type == SSL3_RT_APPLICATION_DATA */
i = s->handshake_func(s);
/* SSLfatal() already called */
if (i < 0)
return (i);
if (i == 0) {
SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE);
return (-1);
}
return i;
if (i == 0)
return -1;
}
start:
s->rwstate = SSL_NOTHING;
@@ -1052,14 +1283,16 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
/* get new records if necessary */
if (num_recs == 0) {
ret = ssl3_get_record(s);
if (ret <= 0)
return (ret);
if (ret <= 0) {
/* SSLfatal() already called if appropriate */
return ret;
}
num_recs = RECORD_LAYER_get_numrpipes(&s->rlayer);
if (num_recs == 0) {
/* Shouldn't happen */
al = SSL_AD_INTERNAL_ERROR;
SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR);
goto f_err;
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_READ_BYTES,
ERR_R_INTERNAL_ERROR);
return -1;
}
}
/* Skip over any records we have already read */
@@ -1087,9 +1320,9 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
if (s->s3->change_cipher_spec /* set when we receive ChangeCipherSpec,
* reset by ssl3_get_finished */
&& (SSL3_RECORD_get_type(rr) != SSL3_RT_HANDSHAKE)) {
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_DATA_BETWEEN_CCS_AND_FINISHED);
goto f_err;
SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES,
SSL_R_DATA_BETWEEN_CCS_AND_FINISHED);
return -1;
}
/*
@@ -1099,12 +1332,13 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
SSL3_RECORD_set_length(rr, 0);
s->rwstate = SSL_NOTHING;
return (0);
return 0;
}
if (type == SSL3_RECORD_get_type(rr)
|| (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC
&& type == SSL3_RT_HANDSHAKE && recvd_type != NULL)) {
&& type == SSL3_RT_HANDSHAKE && recvd_type != NULL
&& !SSL_IS_TLS13(s))) {
/*
* SSL3_RT_APPLICATION_DATA or
* SSL3_RT_HANDSHAKE or
@@ -1116,23 +1350,23 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
*/
if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) &&
(s->enc_read_ctx == NULL)) {
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_APP_DATA_IN_HANDSHAKE);
goto f_err;
SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES,
SSL_R_APP_DATA_IN_HANDSHAKE);
return -1;
}
if (type == SSL3_RT_HANDSHAKE
&& SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC
&& s->rlayer.handshake_fragment_len > 0) {
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_CCS_RECEIVED_EARLY);
goto f_err;
SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES,
SSL_R_CCS_RECEIVED_EARLY);
return -1;
}
if (recvd_type != NULL)
*recvd_type = SSL3_RECORD_get_type(rr);
if (len <= 0) {
if (len == 0) {
/*
* Mark a zero length record as read. This ensures multiple calls to
* SSL_read() with a zero length buffer will eventually cause
@@ -1140,15 +1374,15 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
*/
if (SSL3_RECORD_get_length(rr) == 0)
SSL3_RECORD_set_read(rr);
return len;
return 0;
}
read_bytes = 0;
totalbytes = 0;
do {
if ((unsigned int)len - read_bytes > SSL3_RECORD_get_length(rr))
if (len - totalbytes > SSL3_RECORD_get_length(rr))
n = SSL3_RECORD_get_length(rr);
else
n = (unsigned int)len - read_bytes;
n = len - totalbytes;
memcpy(buf, &(rr->data[rr->off]), n);
buf += n;
@@ -1170,10 +1404,10 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
curr_rec++;
rr++;
}
read_bytes += n;
totalbytes += n;
} while (type == SSL3_RT_APPLICATION_DATA && curr_rec < num_recs
&& read_bytes < (unsigned int)len);
if (read_bytes == 0) {
&& totalbytes < len);
if (totalbytes == 0) {
/* We must have read empty records. Get more data */
goto start;
}
@@ -1181,7 +1415,8 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
&& (s->mode & SSL_MODE_RELEASE_BUFFERS)
&& SSL3_BUFFER_get_left(rbuf) == 0)
ssl3_release_read_buffer(s);
return read_bytes;
*readbytes = totalbytes;
return 1;
}
/*
@@ -1200,9 +1435,9 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
* initial ClientHello. Therefore |type| should always be equal to
* |rr->type|. If not then something has gone horribly wrong
*/
al = SSL_AD_INTERNAL_ERROR;
SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR);
goto f_err;
SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL3_READ_BYTES,
ERR_R_INTERNAL_ERROR);
return -1;
}
if (s->method->version == TLS_ANY_VERSION
@@ -1214,9 +1449,9 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
* other than a ClientHello if we are a server.
*/
s->version = rr->rec_version;
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_MESSAGE);
goto f_err;
SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES,
SSL_R_UNEXPECTED_MESSAGE);
return -1;
}
/*
@@ -1224,18 +1459,14 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
* that so that we can process the data at a fixed place.
*/
{
unsigned int dest_maxlen = 0;
size_t dest_maxlen = 0;
unsigned char *dest = NULL;
unsigned int *dest_len = NULL;
size_t *dest_len = NULL;
if (SSL3_RECORD_get_type(rr) == SSL3_RT_HANDSHAKE) {
dest_maxlen = sizeof(s->rlayer.handshake_fragment);
dest = s->rlayer.handshake_fragment;
dest_len = &s->rlayer.handshake_fragment_len;
} else if (SSL3_RECORD_get_type(rr) == SSL3_RT_ALERT) {
dest_maxlen = sizeof(s->rlayer.alert_fragment);
dest = s->rlayer.alert_fragment;
dest_len = &s->rlayer.alert_fragment_len;
}
if (dest_maxlen > 0) {
@@ -1244,117 +1475,41 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
n = SSL3_RECORD_get_length(rr); /* available bytes */
/* now move 'n' bytes: */
while (n-- > 0) {
dest[(*dest_len)++] =
SSL3_RECORD_get_data(rr)[SSL3_RECORD_get_off(rr)];
SSL3_RECORD_add_off(rr, 1);
SSL3_RECORD_add_length(rr, -1);
}
if (*dest_len < dest_maxlen) {
memcpy(dest + *dest_len,
SSL3_RECORD_get_data(rr) + SSL3_RECORD_get_off(rr), n);
SSL3_RECORD_add_off(rr, n);
SSL3_RECORD_sub_length(rr, n);
*dest_len += n;
if (SSL3_RECORD_get_length(rr) == 0)
SSL3_RECORD_set_read(rr);
if (*dest_len < dest_maxlen)
goto start; /* fragment was too small */
}
}
}
/*-
* s->rlayer.handshake_fragment_len == 4 iff rr->type == SSL3_RT_HANDSHAKE;
* s->rlayer.alert_fragment_len == 2 iff rr->type == SSL3_RT_ALERT.
* (Possibly rr is 'empty' now, i.e. rr->length may be 0.)
*/
/* If we are a client, check for an incoming 'Hello Request': */
if ((!s->server) &&
(s->rlayer.handshake_fragment_len >= 4) &&
(s->rlayer.handshake_fragment[0] == SSL3_MT_HELLO_REQUEST) &&
(s->session != NULL) && (s->session->cipher != NULL)) {
s->rlayer.handshake_fragment_len = 0;
if (SSL3_RECORD_get_type(rr) == SSL3_RT_ALERT) {
unsigned int alert_level, alert_descr;
unsigned char *alert_bytes = SSL3_RECORD_get_data(rr)
+ SSL3_RECORD_get_off(rr);
PACKET alert;
if ((s->rlayer.handshake_fragment[1] != 0) ||
(s->rlayer.handshake_fragment[2] != 0) ||
(s->rlayer.handshake_fragment[3] != 0)) {
al = SSL_AD_DECODE_ERROR;
SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_BAD_HELLO_REQUEST);
goto f_err;
if (!PACKET_buf_init(&alert, alert_bytes, SSL3_RECORD_get_length(rr))
|| !PACKET_get_1(&alert, &alert_level)
|| !PACKET_get_1(&alert, &alert_descr)
|| PACKET_remaining(&alert) != 0) {
SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES,
SSL_R_INVALID_ALERT);
return -1;
}
if (s->msg_callback)
s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE,
s->rlayer.handshake_fragment, 4, s,
s->msg_callback_arg);
if (SSL_is_init_finished(s) &&
(s->options & SSL_OP_NO_RENEGOTIATION) == 0 &&
!(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) &&
!s->s3->renegotiate) {
ssl3_renegotiate(s);
if (ssl3_renegotiate_check(s)) {
i = s->handshake_func(s);
if (i < 0)
return (i);
if (i == 0) {
SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE);
return (-1);
}
if (!(s->mode & SSL_MODE_AUTO_RETRY)) {
if (SSL3_BUFFER_get_left(rbuf) == 0) {
/* no read-ahead left? */
BIO *bio;
/*
* In the case where we try to read application data,
* but we trigger an SSL handshake, we return -1 with
* the retry option set. Otherwise renegotiation may
* cause nasty problems in the blocking world
*/
s->rwstate = SSL_READING;
bio = SSL_get_rbio(s);
BIO_clear_retry_flags(bio);
BIO_set_retry_read(bio);
return (-1);
}
}
} else {
SSL3_RECORD_set_read(rr);
}
} else {
ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION);
SSL3_RECORD_set_read(rr);
}
/*
* we either finished a handshake or ignored the request, now try
* again to obtain the (application) data we were asked for
*/
goto start;
}
/*
* If we are a server and get a client hello when renegotiation isn't
* allowed send back a no renegotiation alert and carry on.
*/
if (s->server
&& SSL_is_init_finished(s)
&& s->version > SSL3_VERSION
&& s->rlayer.handshake_fragment_len >= SSL3_HM_HEADER_LENGTH
&& s->rlayer.handshake_fragment[0] == SSL3_MT_CLIENT_HELLO
&& s->s3->previous_client_finished_len != 0
&& ((!s->s3->send_connection_binding
&& (s->options
& SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION) == 0)
|| (s->options & SSL_OP_NO_RENEGOTIATION) != 0)) {
SSL3_RECORD_set_length(rr, 0);
SSL3_RECORD_set_read(rr);
ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION);
goto start;
}
if (s->rlayer.alert_fragment_len >= 2) {
int alert_level = s->rlayer.alert_fragment[0];
int alert_descr = s->rlayer.alert_fragment[1];
s->rlayer.alert_fragment_len = 0;
if (s->msg_callback)
s->msg_callback(0, s->version, SSL3_RT_ALERT,
s->rlayer.alert_fragment, 2, s,
s->msg_callback(0, s->version, SSL3_RT_ALERT, alert_bytes, 2, s,
s->msg_callback_arg);
if (s->info_callback != NULL)
@@ -1373,14 +1528,23 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
s->rlayer.alert_count++;
if (s->rlayer.alert_count == MAX_WARN_ALERT_COUNT) {
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_TOO_MANY_WARN_ALERTS);
goto f_err;
SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES,
SSL_R_TOO_MANY_WARN_ALERTS);
return -1;
}
if (alert_descr == SSL_AD_CLOSE_NOTIFY) {
s->shutdown |= SSL_RECEIVED_SHUTDOWN;
return (0);
return 0;
}
/*
* Apart from close_notify the only other warning alert in TLSv1.3
* is user_cancelled - which we just ignore.
*/
if (SSL_IS_TLS13(s) && alert_descr != SSL_AD_USER_CANCELLED) {
SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SSL3_READ_BYTES,
SSL_R_UNKNOWN_ALERT_TYPE);
return -1;
}
/*
* This is a warning but we receive it if we requested
@@ -1390,31 +1554,28 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
* future we might have a renegotiation where we don't care if
* the peer refused it where we carry on.
*/
else if (alert_descr == SSL_AD_NO_RENEGOTIATION) {
al = SSL_AD_HANDSHAKE_FAILURE;
SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_NO_RENEGOTIATION);
goto f_err;
if (alert_descr == SSL_AD_NO_RENEGOTIATION) {
SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_SSL3_READ_BYTES,
SSL_R_NO_RENEGOTIATION);
return -1;
}
#ifdef SSL_AD_MISSING_SRP_USERNAME
else if (alert_descr == SSL_AD_MISSING_SRP_USERNAME)
return (0);
#endif
} else if (alert_level == SSL3_AL_FATAL) {
char tmp[16];
s->rwstate = SSL_NOTHING;
s->s3->fatal_alert = alert_descr;
SSLerr(SSL_F_SSL3_READ_BYTES, SSL_AD_REASON_OFFSET + alert_descr);
BIO_snprintf(tmp, sizeof(tmp), "%d", alert_descr);
SSLfatal(s, SSL_AD_NO_ALERT, SSL_F_SSL3_READ_BYTES,
SSL_AD_REASON_OFFSET + alert_descr);
BIO_snprintf(tmp, sizeof tmp, "%d", alert_descr);
ERR_add_error_data(2, "SSL alert number ", tmp);
s->shutdown |= SSL_RECEIVED_SHUTDOWN;
SSL3_RECORD_set_read(rr);
SSL_CTX_remove_session(s->session_ctx, s->session);
return (0);
return 0;
} else {
al = SSL_AD_ILLEGAL_PARAMETER;
SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNKNOWN_ALERT_TYPE);
goto f_err;
SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SSL3_READ_BYTES,
SSL_R_UNKNOWN_ALERT_TYPE);
return -1;
}
goto start;
@@ -1425,34 +1586,42 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
s->rwstate = SSL_NOTHING;
SSL3_RECORD_set_length(rr, 0);
SSL3_RECORD_set_read(rr);
return (0);
return 0;
}
if (SSL3_RECORD_get_type(rr) == SSL3_RT_CHANGE_CIPHER_SPEC) {
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_CCS_RECEIVED_EARLY);
goto f_err;
SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES,
SSL_R_CCS_RECEIVED_EARLY);
return -1;
}
/*
* Unexpected handshake message (Client Hello, or protocol violation)
* Unexpected handshake message (ClientHello, NewSessionTicket (TLS1.3) or
* protocol violation)
*/
if ((s->rlayer.handshake_fragment_len >= 4)
&& !ossl_statem_get_in_handshake(s)) {
if (SSL_is_init_finished(s) &&
!(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS)) {
ossl_statem_set_in_init(s, 1);
s->renegotiate = 1;
s->new_session = 1;
}
&& !ossl_statem_get_in_handshake(s)) {
int ined = (s->early_data_state == SSL_EARLY_DATA_READING);
/* We found handshake data, so we're going back into init */
ossl_statem_set_in_init(s, 1);
i = s->handshake_func(s);
/* SSLfatal() already called if appropriate */
if (i < 0)
return (i);
return i;
if (i == 0) {
SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_SSL_HANDSHAKE_FAILURE);
return (-1);
return -1;
}
/*
* If we were actually trying to read early data and we found a
* handshake message, then we don't want to continue to try and read
* the application data any more. It won't be "early" now.
*/
if (ined)
return -1;
if (!(s->mode & SSL_MODE_AUTO_RETRY)) {
if (SSL3_BUFFER_get_left(rbuf) == 0) {
/* no read-ahead left? */
@@ -1467,7 +1636,7 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
bio = SSL_get_rbio(s);
BIO_clear_retry_flags(bio);
BIO_set_retry_read(bio);
return (-1);
return -1;
}
}
goto start;
@@ -1482,9 +1651,9 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
* no progress is being made and the peer continually sends unrecognised
* record types, using up resources processing them.
*/
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_RECORD);
goto f_err;
SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES,
SSL_R_UNEXPECTED_RECORD);
return -1;
case SSL3_RT_CHANGE_CIPHER_SPEC:
case SSL3_RT_ALERT:
case SSL3_RT_HANDSHAKE:
@@ -1493,9 +1662,9 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
* SSL3_RT_HANDSHAKE when ossl_statem_get_in_handshake(s) is true, but
* that should not happen when type != rr->type
*/
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR);
goto f_err;
SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES,
ERR_R_INTERNAL_ERROR);
return -1;
case SSL3_RT_APPLICATION_DATA:
/*
* At this point, we were expecting handshake data, but have
@@ -1506,18 +1675,30 @@ int ssl3_read_bytes(SSL *s, int type, int *recvd_type, unsigned char *buf,
*/
if (ossl_statem_app_data_allowed(s)) {
s->s3->in_read_app_data = 2;
return (-1);
return -1;
} else if (ossl_statem_skip_early_data(s)) {
/*
* This can happen after a client sends a CH followed by early_data,
* but the server responds with a HelloRetryRequest. The server
* reads the next record from the client expecting to find a
* plaintext ClientHello but gets a record which appears to be
* application data. The trial decrypt "works" because null
* decryption was applied. We just skip it and move on to the next
* record.
*/
if (!early_data_count_ok(s, rr->length,
EARLY_DATA_CIPHERTEXT_OVERHEAD, 0)) {
/* SSLfatal() already called */
return -1;
}
SSL3_RECORD_set_read(rr);
goto start;
} else {
al = SSL_AD_UNEXPECTED_MESSAGE;
SSLerr(SSL_F_SSL3_READ_BYTES, SSL_R_UNEXPECTED_RECORD);
goto f_err;
SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, SSL_F_SSL3_READ_BYTES,
SSL_R_UNEXPECTED_RECORD);
return -1;
}
}
/* not reached */
f_err:
ssl3_send_alert(s, SSL3_AL_FATAL, al);
return (-1);
}
void ssl3_record_sequence_update(unsigned char *seq)
@@ -1543,7 +1724,7 @@ int RECORD_LAYER_is_sslv2_record(RECORD_LAYER *rl)
/*
* Returns the length in bytes of the current rrec
*/
unsigned int RECORD_LAYER_get_rrec_length(RECORD_LAYER *rl)
size_t RECORD_LAYER_get_rrec_length(RECORD_LAYER *rl)
{
return SSL3_RECORD_get_length(&rl->rrec[0]);
}