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-rw-r--r--source3/rpc_parse/parse_misc.c92
-rw-r--r--source3/rpc_parse/parse_prs.c57
2 files changed, 71 insertions, 78 deletions
diff --git a/source3/rpc_parse/parse_misc.c b/source3/rpc_parse/parse_misc.c
index 0ebc16581b..b53f9ec98c 100644
--- a/source3/rpc_parse/parse_misc.c
+++ b/source3/rpc_parse/parse_misc.c
@@ -553,7 +553,6 @@ void init_unistr(UNISTR *str, const char *buf)
}
len = strlen(buf) + 1;
- len = MAX(len,MAX_UNISTRLEN);
str->buffer = TALLOC_ZERO_ARRAY(get_talloc_ctx(), uint16, len);
if (str->buffer == NULL)
@@ -585,14 +584,12 @@ BOOL smb_io_unistr(const char *desc, UNISTR *uni, prs_struct *ps, int depth)
Allocate the BUFFER3 memory.
********************************************************************/
-static void create_buffer3(BUFFER3 *str, size_t len)
+static size_t create_buffer3(BUFFER3 *str, size_t len)
{
- len = MAX(len,MAX_BUFFERLEN);
-
str->buffer = TALLOC_ZERO(get_talloc_ctx(), len);
if (str->buffer == NULL)
smb_panic("create_buffer3: talloc fail\n");
-
+ return len;
}
/*******************************************************************
@@ -604,10 +601,7 @@ void init_buffer3_uint32(BUFFER3 *str, uint32 val)
ZERO_STRUCTP(str);
/* set up string lengths. */
- str->buf_max_len = sizeof(uint32);
- str->buf_len = sizeof(uint32);
-
- create_buffer3(str, sizeof(uint32));
+ str->buf_max_len = str->buf_len = create_buffer3(str, sizeof(uint32));
SIVAL(str->buffer, 0, val);
}
@@ -620,11 +614,7 @@ void init_buffer3_str(BUFFER3 *str, const char *buf, int len)
ZERO_STRUCTP(str);
/* set up string lengths. */
- str->buf_max_len = len * 2;
- str->buf_len = len * 2;
-
- create_buffer3(str, str->buf_max_len);
-
+ str->buf_max_len = str->buf_len = create_buffer3(str, len*2);
rpcstr_push(str->buffer, buf, str->buf_max_len, STR_TERMINATE);
}
@@ -636,24 +626,24 @@ void init_buffer3_str(BUFFER3 *str, const char *buf, int len)
void init_buffer3_hex(BUFFER3 *str, const char *buf)
{
ZERO_STRUCTP(str);
- create_buffer3(str, strlen(buf));
- str->buf_max_len = str->buf_len = strhex_to_str((char *)str->buffer, sizeof(str->buffer), buf);
+ str->buf_max_len = str->buf_len = create_buffer3(str, strlen(buf));
+ str->buf_max_len = str->buf_len = strhex_to_str((char *)str->buffer, str->buf_len, buf);
}
/*******************************************************************
Inits a BUFFER3 structure.
********************************************************************/
-void init_buffer3_bytes(BUFFER3 *str, uint8 *buf, int len)
+void init_buffer3_bytes(BUFFER3 *str, uint8 *buf, size_t len)
{
ZERO_STRUCTP(str);
/* max buffer size (allocated size) */
- str->buf_max_len = len;
if (buf != NULL) {
- create_buffer3(str, len);
+ len = create_buffer3(str, len);
memcpy(str->buffer, buf, len);
}
+ str->buf_max_len = len;
str->buf_len = buf != NULL ? len : 0;
}
@@ -730,11 +720,11 @@ void init_buffer2(BUFFER2 *str, const uint8 *buf, size_t len)
str->buf_len = buf != NULL ? len : 0;
if (buf != NULL) {
- len = MAX(len,MAX_BUFFERLEN);
- str->buffer = TALLOC_ZERO(get_talloc_ctx(), len);
+ SMB_ASSERT(str->buf_max_len >= str->buf_len);
+ str->buffer = TALLOC_ZERO(get_talloc_ctx(), str->buf_max_len);
if (str->buffer == NULL)
smb_panic("init_buffer2: talloc fail\n");
- memcpy(str->buffer, buf, MIN(str->buf_len, len));
+ memcpy(str->buffer, buf, str->buf_len);
}
}
@@ -802,19 +792,22 @@ void init_buf_unistr2(UNISTR2 *str, uint32 *ptr, const char *buf)
void copy_unistr2(UNISTR2 *str, const UNISTR2 *from)
{
+ if (from->buffer == NULL) {
+ ZERO_STRUCTP(str);
+ return;
+ }
+
+ SMB_ASSERT(from->uni_max_len >= from->uni_str_len);
+
str->uni_max_len = from->uni_max_len;
str->offset = from->offset;
str->uni_str_len = from->uni_str_len;
- if (from->buffer == NULL)
- return;
-
/* the string buffer is allocated to the maximum size
(the the length of the source string) to prevent
reallocation of memory. */
if (str->buffer == NULL) {
- size_t alloc_len = MAX(from->uni_max_len,MAX_UNISTRLEN);
- str->buffer = (uint16 *)TALLOC_ZERO_ARRAY(get_talloc_ctx(), uint16, alloc_len);
+ str->buffer = (uint16 *)TALLOC_ZERO_ARRAY(get_talloc_ctx(), uint16, str->uni_max_len);
if ((str->buffer == NULL)) {
smb_panic("copy_unistr2: talloc fail\n");
return;
@@ -822,24 +815,25 @@ void copy_unistr2(UNISTR2 *str, const UNISTR2 *from)
}
/* copy the string */
- memcpy(str->buffer, from->buffer, from->uni_max_len*sizeof(uint16));
+ memcpy(str->buffer, from->buffer, str->uni_max_len*sizeof(uint16));
}
/*******************************************************************
Creates a STRING2 structure.
********************************************************************/
-void init_string2(STRING2 *str, const char *buf, int max_len, int str_len)
+void init_string2(STRING2 *str, const char *buf, size_t max_len, size_t str_len)
{
/* set up string lengths. */
+ SMB_ASSERT(max_len >= str_len);
+
str->str_max_len = max_len;
str->offset = 0;
str->str_str_len = str_len;
/* store the string */
if(str_len != 0) {
- int alloc_len = MAX(str_len, MAX_STRINGLEN);
- str->buffer = TALLOC_ZERO(get_talloc_ctx(), alloc_len);
+ str->buffer = TALLOC_ZERO(get_talloc_ctx(), str->str_max_len);
if (str->buffer == NULL)
smb_panic("init_string2: malloc fail\n");
memcpy(str->buffer, buf, str_len);
@@ -903,8 +897,6 @@ void init_unistr2(UNISTR2 *str, const char *buf, enum unistr2_term_codes flags)
len = strlen(buf) + 1;
}
- len = MAX(len,MAX_UNISTRLEN);
-
str->buffer = TALLOC_ZERO_ARRAY(get_talloc_ctx(), uint16, len);
if (str->buffer == NULL) {
smb_panic("init_unistr2: malloc fail\n");
@@ -943,7 +935,6 @@ void init_unistr2(UNISTR2 *str, const char *buf, enum unistr2_term_codes flags)
void init_unistr2_w(TALLOC_CTX *ctx, UNISTR2 *str, const smb_ucs2_t *buf)
{
uint32 len = strlen_w(buf);
- uint32 alloc_len;
ZERO_STRUCTP(str);
@@ -952,9 +943,7 @@ void init_unistr2_w(TALLOC_CTX *ctx, UNISTR2 *str, const smb_ucs2_t *buf)
str->offset = 0;
str->uni_str_len = len;
- alloc_len = MAX((len + 1), MAX_UNISTRLEN);
-
- str->buffer = TALLOC_ZERO_ARRAY(ctx, uint16, alloc_len);
+ str->buffer = TALLOC_ZERO_ARRAY(ctx, uint16, len + 1);
if (str->buffer == NULL) {
smb_panic("init_unistr2_w: malloc fail\n");
return;
@@ -1667,25 +1656,19 @@ BOOL smb_io_pol_hnd(const char *desc, POLICY_HND *pol, prs_struct *ps, int depth
void init_unistr3(UNISTR3 *str, const char *buf)
{
- size_t len, alloc_len;
-
if (buf == NULL) {
str->uni_str_len=0;
str->str.buffer = NULL;
return;
}
- len = strlen(buf) + 1;
+ str->uni_str_len = strlen(buf) + 1;
- str->uni_str_len=len;
-
- alloc_len = MAX(len, MAX_UNISTRLEN);
-
- str->str.buffer = TALLOC_ZERO_ARRAY(get_talloc_ctx(), uint16, alloc_len);
+ str->str.buffer = TALLOC_ZERO_ARRAY(get_talloc_ctx(), uint16, str->uni_str_len);
if (str->str.buffer == NULL)
smb_panic("init_unistr3: malloc fail\n");
- rpcstr_push((char *)str->str.buffer, buf, len * sizeof(uint16), STR_TERMINATE);
+ rpcstr_push((char *)str->str.buffer, buf, str->uni_str_len * sizeof(uint16), STR_TERMINATE);
}
/*******************************************************************
@@ -1750,8 +1733,8 @@ BOOL smb_io_bufhdr4(const char *desc, BUFHDR4 *hdr, prs_struct *ps, int depth)
depth++;
prs_align(ps);
- prs_uint32("size", ps, depth, &(hdr->size));
- prs_uint32("buffer", ps, depth, &(hdr->buffer));
+ prs_uint32("size", ps, depth, &hdr->size);
+ prs_uint32("buffer", ps, depth, &hdr->buffer);
return True;
}
@@ -1759,19 +1742,20 @@ BOOL smb_io_bufhdr4(const char *desc, BUFHDR4 *hdr, prs_struct *ps, int depth)
/*******************************************************************
reads or writes a BUFFER4 structure.
********************************************************************/
+
BOOL smb_io_buffer4(const char *desc, BUFFER4 *buf4, uint32 buffer, prs_struct *ps, int depth)
{
prs_debug(ps, depth, desc, "smb_io_buffer4");
depth++;
prs_align(ps);
- prs_uint32("buf_len", ps, depth, &(buf4->buf_len));
-
- if (buf4->buf_len > MAX_BUFFERLEN)
- {
- buf4->buf_len = MAX_BUFFERLEN;
+ prs_uint32("buf_len", ps, depth, &buf4->buf_len);
+ if (UNMARSHALLING(ps)) {
+ buf4->buffer = PRS_ALLOC_MEM(ps, uint8, buf4->buf_len);
+ if (!buf4->buffer) {
+ return False;
+ }
}
-
prs_uint8s(True, "buffer", ps, depth, buf4->buffer, buf4->buf_len);
return True;
diff --git a/source3/rpc_parse/parse_prs.c b/source3/rpc_parse/parse_prs.c
index 67a9d96e19..4b78d373ba 100644
--- a/source3/rpc_parse/parse_prs.c
+++ b/source3/rpc_parse/parse_prs.c
@@ -726,14 +726,14 @@ BOOL prs_uint8s(BOOL charmode, const char *name, prs_struct *ps, int depth, uint
SCVAL(q, i, data8s[i]);
}
- DEBUG(5,("%s%04x %s: ", tab_depth(depth), ps->data_offset ,name));
- if (charmode)
+ DEBUG(5,("%s%04x %s: ", tab_depth(depth), ps->data_offset ,name));
+ if (charmode)
print_asc(5, (unsigned char*)data8s, len);
else {
- for (i = 0; i < len; i++)
+ for (i = 0; i < len; i++)
DEBUG(5,("%02x ", data8s[i]));
}
- DEBUG(5,("\n"));
+ DEBUG(5,("\n"));
ps->data_offset += len;
@@ -776,7 +776,7 @@ BOOL prs_uint16s(BOOL charmode, const char *name, prs_struct *ps, int depth, uin
for (i = 0; i < len; i++)
DEBUG(5,("%04x ", data16s[i]));
}
- DEBUG(5,("\n"));
+ DEBUG(5,("\n"));
ps->data_offset += (len * sizeof(uint16));
@@ -818,7 +818,7 @@ static void dbg_rw_punival(BOOL charmode, const char *name, int depth, prs_struc
for (i = 0; i < len; i++)
DEBUG(5,("%04x ", out_buf[i]));
}
- DEBUG(5,("\n"));
+ DEBUG(5,("\n"));
}
/******************************************************************
@@ -873,7 +873,7 @@ BOOL prs_uint32s(BOOL charmode, const char *name, prs_struct *ps, int depth, uin
for (i = 0; i < len; i++)
DEBUG(5,("%08x ", data32s[i]));
}
- DEBUG(5,("\n"));
+ DEBUG(5,("\n"));
ps->data_offset += (len * sizeof(uint32));
@@ -924,8 +924,11 @@ BOOL prs_buffer2(BOOL charmode, const char *name, prs_struct *ps, int depth, BUF
return False;
if (UNMARSHALLING(ps)) {
- if ( str->buf_len ) {
- str->buffer = PRS_ALLOC_MEM(ps, uint16, str->buf_len);
+ if (str->buf_len > str->buf_max_len) {
+ return False;
+ }
+ if ( str->buf_max_len ) {
+ str->buffer = PRS_ALLOC_MEM(ps, uint16, str->buf_max_len);
if ( str->buffer == NULL )
return False;
}
@@ -947,11 +950,14 @@ BOOL prs_buffer2(BOOL charmode, const char *name, prs_struct *ps, int depth, BUF
BOOL prs_string2(BOOL charmode, const char *name, prs_struct *ps, int depth, STRING2 *str)
{
unsigned int i;
- char *q = prs_mem_get(ps, str->str_max_len);
+ char *q = prs_mem_get(ps, str->str_str_len);
if (q == NULL)
return False;
if (UNMARSHALLING(ps)) {
+ if (str->str_str_len > str->str_max_len) {
+ return False;
+ }
str->buffer = PRS_ALLOC_MEM(ps,unsigned char, str->str_max_len);
if (str->buffer == NULL)
return False;
@@ -965,14 +971,14 @@ BOOL prs_string2(BOOL charmode, const char *name, prs_struct *ps, int depth, STR
SCVAL(q, i, str->buffer[i]);
}
- DEBUG(5,("%s%04x %s: ", tab_depth(depth), ps->data_offset, name));
- if (charmode)
+ DEBUG(5,("%s%04x %s: ", tab_depth(depth), ps->data_offset, name));
+ if (charmode)
print_asc(5, (unsigned char*)str->buffer, str->str_str_len);
else {
- for (i = 0; i < str->str_str_len; i++)
+ for (i = 0; i < str->str_str_len; i++)
DEBUG(5,("%02x ", str->buffer[i]));
}
- DEBUG(5,("\n"));
+ DEBUG(5,("\n"));
ps->data_offset += str->str_str_len;
@@ -996,6 +1002,9 @@ BOOL prs_unistr2(BOOL charmode, const char *name, prs_struct *ps, int depth, UNI
return True;
if (UNMARSHALLING(ps)) {
+ if (str->uni_str_len > str->uni_max_len) {
+ return False;
+ }
str->buffer = PRS_ALLOC_MEM(ps,uint16,str->uni_max_len);
if (str->buffer == NULL)
return False;
@@ -1061,10 +1070,8 @@ BOOL prs_unistr(const char *name, prs_struct *ps, int depth, UNISTR *str)
start = (uint8*)q;
- for(len = 0; str->buffer[len] != 0; len++)
- {
- if(ps->bigendian_data)
- {
+ for(len = 0; str->buffer[len] != 0; len++) {
+ if(ps->bigendian_data) {
/* swap bytes - p is little endian, q is big endian. */
q[0] = (char)p[1];
q[1] = (char)p[0];
@@ -1126,8 +1133,7 @@ BOOL prs_unistr(const char *name, prs_struct *ps, int depth, UNISTR *str)
/* the (len < alloc_len) test is to prevent us from overwriting
memory that is not ours...if we get that far, we have a non-null
terminated string in the buffer and have messed up somewhere */
- while ((len < alloc_len) && (*(uint16 *)q != 0))
- {
+ while ((len < alloc_len) && (*(uint16 *)q != 0)) {
if(ps->bigendian_data)
{
/* swap bytes - q is big endian, p is little endian. */
@@ -1145,8 +1151,7 @@ BOOL prs_unistr(const char *name, prs_struct *ps, int depth, UNISTR *str)
len++;
}
- if (len < alloc_len)
- {
+ if (len < alloc_len) {
/* NULL terminate the UNISTR */
str->buffer[len++] = '\0';
}
@@ -1326,6 +1331,7 @@ int tdb_prs_fetch(TDB_CONTEXT *tdb, char *keystr, prs_struct *ps, TALLOC_CTX *me
/*******************************************************************
hash a stream.
********************************************************************/
+
BOOL prs_hash1(prs_struct *ps, uint32 offset, uint8 sess_key[16], int len)
{
char *q;
@@ -1347,11 +1353,11 @@ BOOL prs_hash1(prs_struct *ps, uint32 offset, uint8 sess_key[16], int len)
return True;
}
-
/*******************************************************************
Create a digest over the entire packet (including the data), and
MD5 it with the session key.
********************************************************************/
+
static void netsec_digest(struct netsec_auth_struct *a,
int auth_flags,
RPC_AUTH_NETSEC_CHK * verf,
@@ -1383,6 +1389,7 @@ static void netsec_digest(struct netsec_auth_struct *a,
/*******************************************************************
Calculate the key with which to encode the data payload
********************************************************************/
+
static void netsec_get_sealing_key(struct netsec_auth_struct *a,
RPC_AUTH_NETSEC_CHK *verf,
uchar sealing_key[16])
@@ -1410,6 +1417,7 @@ static void netsec_get_sealing_key(struct netsec_auth_struct *a,
/*******************************************************************
Encode or Decode the sequence number (which is symmetric)
********************************************************************/
+
static void netsec_deal_with_seq_num(struct netsec_auth_struct *a,
RPC_AUTH_NETSEC_CHK *verf)
{
@@ -1432,6 +1440,7 @@ static void netsec_deal_with_seq_num(struct netsec_auth_struct *a,
/*******************************************************************
creates an RPC_AUTH_NETSEC_CHK structure.
********************************************************************/
+
static BOOL init_rpc_auth_netsec_chk(RPC_AUTH_NETSEC_CHK * chk,
const uchar sig[8],
const uchar packet_digest[8],
@@ -1448,13 +1457,13 @@ static BOOL init_rpc_auth_netsec_chk(RPC_AUTH_NETSEC_CHK * chk,
return True;
}
-
/*******************************************************************
Encode a blob of data using the netsec (schannel) alogrithm, also produceing
a checksum over the original data. We currently only support
signing and sealing togeather - the signing-only code is close, but not
quite compatible with what MS does.
********************************************************************/
+
void netsec_encode(struct netsec_auth_struct *a, int auth_flags,
enum netsec_direction direction,
RPC_AUTH_NETSEC_CHK * verf,
generated by cgit (git 2.34.1) at 2024-12-13 17:30:23 +0000