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-rw-r--r--source4/build/pidl/parser.pm72
-rw-r--r--source4/librpc/ndr/libndr.h27
-rw-r--r--source4/librpc/ndr/ndr.c118
3 files changed, 152 insertions, 65 deletions
diff --git a/source4/build/pidl/parser.pm b/source4/build/pidl/parser.pm
index cec983724d..4461bb77af 100644
--- a/source4/build/pidl/parser.pm
+++ b/source4/build/pidl/parser.pm
@@ -269,6 +269,25 @@ sub ParseArrayPrint($$)
}
#####################################################################
+# check the size_is and length_is constraints
+sub CheckArraySizes($$)
+{
+ my $e = shift;
+ my $var_prefix = shift;
+
+ if (util::has_property($e, "size_is")) {
+ my $size = find_size_var($e, util::array_size($e), $var_prefix);
+ pidl "\tNDR_CHECK(ndr_check_array_size(ndr, (void*)&$var_prefix$e->{NAME}, $size));\n";
+ }
+
+ if (my $length = util::has_property($e, "length_is")) {
+ $length = find_size_var($e, $length, $var_prefix);
+ pidl "\tNDR_CHECK(ndr_check_array_length(ndr, (void*)&$var_prefix$e->{NAME}, $length));\n";
+ }
+}
+
+
+#####################################################################
# parse an array - pull side
sub ParseArrayPull($$$)
{
@@ -294,47 +313,28 @@ sub ParseArrayPull($$$)
}
# non fixed arrays encode the size just before the array
- pidl "\t{\n";
- pidl "\t\tuint32_t _array_size;\n";
- pidl "\t\tNDR_CHECK(ndr_pull_uint32(ndr, &_array_size));\n";
- if ($size =~ /r->in/) {
- pidl "\t\tif (!(ndr->flags & LIBNDR_FLAG_REF_ALLOC) && _array_size != $size) {\n";
- } else {
- pidl "\t\tif ($size != _array_size) {\n";
- }
- pidl "\t\t\treturn ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE, \"Bad array size %u should be %u\", _array_size, $size);\n";
- pidl "\t\t}\n";
- if ($size =~ /r->in/) {
- pidl "else { $size = _array_size; }\n";
- }
- pidl "\t}\n";
+ pidl "\t\tNDR_CHECK(ndr_pull_array_size(ndr, &$var_prefix$e->{NAME}));\n";
+ $alloc_size = "ndr_get_array_size(ndr, &$var_prefix$e->{NAME})";
}
if ((util::need_alloc($e) && !util::is_fixed_array($e)) ||
($var_prefix eq "r->in." && util::has_property($e, "ref"))) {
if (!util::is_inline_array($e) || $ndr_flags eq "NDR_SCALARS") {
- pidl "\t\tNDR_ALLOC_N(ndr, $var_prefix$e->{NAME}, MAX(1, $alloc_size));\n";
+ pidl "\t\tNDR_ALLOC_N(ndr, $var_prefix$e->{NAME}, $alloc_size);\n";
}
}
if (($var_prefix eq "r->out." && util::has_property($e, "ref"))) {
if (!util::is_inline_array($e) || $ndr_flags eq "NDR_SCALARS") {
pidl "\tif (ndr->flags & LIBNDR_FLAG_REF_ALLOC) {";
- pidl "\t\tNDR_ALLOC_N(ndr, $var_prefix$e->{NAME}, MAX(1, $alloc_size));\n";
+ pidl "\t\tNDR_ALLOC_N(ndr, $var_prefix$e->{NAME}, $alloc_size);\n";
pidl "\t}\n";
}
}
- pidl "\t{\n";
-
if (my $length = util::has_property($e, "length_is")) {
- $length = find_size_var($e, $length, $var_prefix);
- pidl "\t\tuint32_t _offset, _length;\n";
- pidl "\t\tNDR_CHECK(ndr_pull_uint32(ndr, &_offset));\n";
- pidl "\t\tNDR_CHECK(ndr_pull_uint32(ndr, &_length));\n";
- pidl "\t\tif (_offset != 0) return ndr_pull_error(ndr, NDR_ERR_OFFSET, \"Bad array offset 0x%08x\", _offset);\n";
- pidl "\t\tif (_length > $size || _length != $length) return ndr_pull_error(ndr, NDR_ERR_LENGTH, \"Bad array length 0x%08x > size 0x%08x\", _offset, $size);\n\n";
- $size = "_length";
+ pidl "\t\tNDR_CHECK(ndr_pull_array_length(ndr, &$var_prefix$e->{NAME}));\n";
+ $size = "ndr_get_array_length(ndr, &$var_prefix$e->{NAME})";
}
if (util::is_scalar_type($e->{TYPE})) {
@@ -342,8 +342,6 @@ sub ParseArrayPull($$$)
} else {
pidl "\t\tNDR_CHECK(ndr_pull_array(ndr, $ndr_flags, (void **)$var_prefix$e->{NAME}, sizeof($var_prefix$e->{NAME}\[0]), $size, (ndr_pull_flags_fn_t)ndr_pull_$e->{TYPE}));\n";
}
-
- pidl "\t}\n";
}
@@ -835,6 +833,10 @@ sub ParseStructPull($)
ParseElementPullBuffer($e, "r->", "NDR_BUFFERS");
}
+ foreach my $e (@{$struct->{ELEMENTS}}) {
+ CheckArraySizes($e, "r->");
+ }
+
pidl "\tndr_pull_struct_end(ndr);\n";
pidl "done:\n";
@@ -844,7 +846,6 @@ sub ParseStructPull($)
#####################################################################
# calculate size of ndr struct
-
sub ParseStructNdrSize($)
{
my $t = shift;
@@ -855,7 +856,6 @@ sub ParseStructNdrSize($)
pidl "{\n";
if (util::has_property($t->{DATA}, "flag")) {
-
pidl "\tflags = flags | " . $t->{DATA}->{PROPERTIES}->{flag} . ";\n";
}
@@ -1398,7 +1398,7 @@ sub AllocateRefVars($)
# its an array
my $size = find_size_var($e, $asize, "r->out.");
- pidl "\tNDR_ALLOC_N(ndr, r->out.$e->{NAME}, MAX(1, $size));\n";
+ pidl "\tNDR_ALLOC_N(ndr, r->out.$e->{NAME}, $size);\n";
if (util::has_property($e, "in")) {
pidl "\tmemcpy(r->out.$e->{NAME},r->in.$e->{NAME},$size * sizeof(*r->in.$e->{NAME}));\n";
} else {
@@ -1448,6 +1448,12 @@ sub ParseFunctionPull($)
}
}
+ foreach my $e (@{$fn->{DATA}}) {
+ if (util::has_property($e, "in")) {
+ CheckArraySizes($e, "r->in.");
+ }
+ }
+
pidl "\nndr_out:\n";
pidl "\tif (!(flags & NDR_OUT)) goto done;\n\n";
@@ -1457,6 +1463,12 @@ sub ParseFunctionPull($)
}
}
+ foreach my $e (@{$fn->{DATA}}) {
+ if (util::has_property($e, "out")) {
+ CheckArraySizes($e, "r->out.");
+ }
+ }
+
if ($fn->{RETURN_TYPE} && $fn->{RETURN_TYPE} ne "void") {
pidl "\tNDR_CHECK(ndr_pull_$fn->{RETURN_TYPE}(ndr, &r->out.result));\n";
}
diff --git a/source4/librpc/ndr/libndr.h b/source4/librpc/ndr/libndr.h
index fe817bfdcd..bb28c3a23c 100644
--- a/source4/librpc/ndr/libndr.h
+++ b/source4/librpc/ndr/libndr.h
@@ -47,6 +47,8 @@ struct ndr_pull {
uint32_t offset;
struct ndr_token_list *relative_list;
+ struct ndr_token_list *array_size_list;
+ struct ndr_token_list *array_length_list;
/* this is used to ensure we generate unique reference IDs
between request and reply */
@@ -149,7 +151,8 @@ enum ndr_err_code {
NDR_ERR_VALIDATE,
NDR_ERR_BUFSIZE,
NDR_ERR_ALLOC,
- NDR_ERR_RANGE
+ NDR_ERR_RANGE,
+ NDR_ERR_TOKEN
};
/*
@@ -236,30 +239,20 @@ enum ndr_err_code {
#define NDR_ALLOC_N_SIZE(ndr, s, n, elsize) do { \
- if ((n) == 0) { \
- (s) = NULL; \
- } else { \
- (s) = talloc_array(ndr, elsize, n, __location__); \
- if (!(s)) return ndr_pull_error(ndr, \
- NDR_ERR_ALLOC, \
- "Alloc %u * %u failed\n", \
- n, elsize); \
- } \
- } while (0)
+ (s) = talloc_array(ndr, elsize, n, __location__); \
+ if (!(s)) return ndr_pull_error(ndr, NDR_ERR_ALLOC, "Alloc %u * %u failed\n", n, elsize); \
+} while (0)
#define NDR_ALLOC_N(ndr, s, n) NDR_ALLOC_N_SIZE(ndr, s, n, sizeof(*(s)))
#define NDR_PUSH_ALLOC_SIZE(ndr, s, size) do { \
- (s) = talloc(ndr, size); \
- if ((size) && !(s)) return ndr_push_error(ndr, NDR_ERR_ALLOC, \
- "push alloc %u failed\n",\
- size); \
- } while (0)
+ (s) = talloc(ndr, size); \
+ if (!(s)) return ndr_push_error(ndr, NDR_ERR_ALLOC, "push alloc %u failed\n", size); \
+} while (0)
#define NDR_PUSH_ALLOC(ndr, s) NDR_PUSH_ALLOC_SIZE(ndr, s, sizeof(*(s)))
-
/* these are used when generic fn pointers are needed for ndr push/pull fns */
typedef NTSTATUS (*ndr_push_fn_t)(struct ndr_push *, void *);
typedef NTSTATUS (*ndr_pull_fn_t)(struct ndr_pull *, void *);
diff --git a/source4/librpc/ndr/ndr.c b/source4/librpc/ndr/ndr.c
index 857e171224..7b55f4efb7 100644
--- a/source4/librpc/ndr/ndr.c
+++ b/source4/librpc/ndr/ndr.c
@@ -48,15 +48,11 @@ struct ndr_pull *ndr_pull_init_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx)
{
struct ndr_pull *ndr;
- ndr = talloc_p(mem_ctx, struct ndr_pull);
+ ndr = talloc_zero_p(mem_ctx, struct ndr_pull);
if (!ndr) return NULL;
- ndr->flags = 0;
ndr->data = blob->data;
ndr->data_size = blob->length;
- ndr->offset = 0;
- ndr->ptr_count = 0;
- ndr->relative_list = NULL;
return ndr;
}
@@ -125,7 +121,7 @@ struct ndr_push *ndr_push_init_ctx(TALLOC_CTX *mem_ctx)
{
struct ndr_push *ndr;
- ndr = talloc_p(mem_ctx, struct ndr_push);
+ ndr = talloc_zero_p(mem_ctx, struct ndr_push);
if (!ndr) {
return NULL;
}
@@ -136,9 +132,6 @@ struct ndr_push *ndr_push_init_ctx(TALLOC_CTX *mem_ctx)
if (!ndr->data) {
return NULL;
}
- ndr->offset = 0;
- ndr->ptr_count = 0;
- ndr->relative_list = NULL;
return ndr;
}
@@ -381,8 +374,12 @@ static NTSTATUS ndr_map_error(enum ndr_err_code err)
switch (err) {
case NDR_ERR_BUFSIZE:
return NT_STATUS_BUFFER_TOO_SMALL;
+ case NDR_ERR_TOKEN:
+ return NT_STATUS_INTERNAL_ERROR;
case NDR_ERR_ALLOC:
return NT_STATUS_NO_MEMORY;
+ case NDR_ERR_ARRAY_SIZE:
+ return NT_STATUS_ARRAY_BOUNDS_EXCEEDED;
default:
break;
}
@@ -655,18 +652,109 @@ static NTSTATUS ndr_token_store(TALLOC_CTX *mem_ctx,
/*
retrieve a token from a ndr context
*/
-static uint32_t ndr_token_retrieve(struct ndr_token_list **list, const void *key)
+static NTSTATUS ndr_token_retrieve(struct ndr_token_list **list, const void *key, uint32_t *v)
{
struct ndr_token_list *tok;
for (tok=*list;tok;tok=tok->next) {
if (tok->key == key) {
DLIST_REMOVE((*list), tok);
+ *v = tok->value;
+ return NT_STATUS_OK;
+ }
+ }
+ return ndr_map_error(NDR_ERR_TOKEN);
+}
+
+/*
+ peek at but don't removed a token from a ndr context
+*/
+static uint32_t ndr_token_peek(struct ndr_token_list **list, const void *key)
+{
+ struct ndr_token_list *tok;
+ for (tok=*list;tok;tok=tok->next) {
+ if (tok->key == key) {
return tok->value;
}
}
return 0;
}
+/*
+ pull an array size field and add it to the array_size_list token list
+*/
+NTSTATUS ndr_pull_array_size(struct ndr_pull *ndr, const void *p)
+{
+ uint32_t size;
+ NDR_CHECK(ndr_pull_uint32(ndr, &size));
+ return ndr_token_store(ndr, &ndr->array_size_list, p, size);
+}
+
+/*
+ get the stored array size field
+*/
+uint32_t ndr_get_array_size(struct ndr_pull *ndr, const void *p)
+{
+ return ndr_token_peek(&ndr->array_size_list, p);
+}
+
+/*
+ check the stored array size field
+*/
+NTSTATUS ndr_check_array_size(struct ndr_pull *ndr, const void **p, uint32_t size)
+{
+ uint32 stored;
+ if (*p == NULL) {
+ return NT_STATUS_OK;
+ }
+ NDR_CHECK(ndr_token_retrieve(&ndr->array_size_list, p, &stored));
+ if (stored != size) {
+ return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
+ "Bad array size - got %u expected %u\n",
+ stored, size);
+ }
+ return NT_STATUS_OK;
+}
+
+/*
+ pull an array length field and add it to the array_length_list token list
+*/
+NTSTATUS ndr_pull_array_length(struct ndr_pull *ndr, const void *p)
+{
+ uint32_t length, offset;
+ NDR_CHECK(ndr_pull_uint32(ndr, &offset));
+ if (offset != 0) {
+ return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
+ "non-zero array offset %u\n", offset);
+ }
+ NDR_CHECK(ndr_pull_uint32(ndr, &length));
+ return ndr_token_store(ndr, &ndr->array_length_list, p, length);
+}
+
+/*
+ get the stored array length field
+*/
+uint32_t ndr_get_array_length(struct ndr_pull *ndr, const void *p)
+{
+ return ndr_token_peek(&ndr->array_length_list, p);
+}
+
+/*
+ check the stored array length field
+*/
+NTSTATUS ndr_check_array_length(struct ndr_pull *ndr, void *p, uint32_t length)
+{
+ uint32_t stored;
+ if (*(void **)p == NULL) {
+ return NT_STATUS_OK;
+ }
+ NDR_CHECK(ndr_token_retrieve(&ndr->array_length_list, p, &stored));
+ if (stored != length) {
+ return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
+ "Bad array length - got %u expected %u\n",
+ stored, length);
+ }
+ return NT_STATUS_OK;
+}
/*
pull a relative object - stage1
@@ -689,10 +777,7 @@ NTSTATUS ndr_pull_relative1(struct ndr_pull *ndr, const void *p, uint32_t rel_of
NTSTATUS ndr_pull_relative2(struct ndr_pull *ndr, const void *p)
{
uint32_t rel_offset;
- rel_offset = ndr_token_retrieve(&ndr->relative_list, p);
- if (rel_offset == 0) {
- return NT_STATUS_INTERNAL_ERROR;
- }
+ NDR_CHECK(ndr_token_retrieve(&ndr->relative_list, p, &rel_offset));
return ndr_pull_set_offset(ndr, rel_offset);
}
@@ -723,10 +808,7 @@ NTSTATUS ndr_push_relative2(struct ndr_push *ndr, const void *p)
}
NDR_CHECK(ndr_push_align(ndr, 4));
ndr_push_save(ndr, &save);
- ndr->offset = ndr_token_retrieve(&ndr->relative_list, p);
- if (ndr->offset == 0) {
- return NT_STATUS_INTERNAL_ERROR;
- }
+ NDR_CHECK(ndr_token_retrieve(&ndr->relative_list, p, &ndr->offset));
if (ndr->flags & LIBNDR_FLAG_RELATIVE_CURRENT) {
NDR_CHECK(ndr_push_uint32(ndr, save.offset - ndr->offset));
} else {
generated by cgit (git 2.34.1) at 2024-12-04 10:52:59 +0000