[Tarantool-patches] [PATCH v1 1/1] box: check STRING length when it is cast to UUID

[Mergen Imeev via Tarantool-patches <tarantool-patches@dev.tarantool.org>]

After this patch, the tt_uuid_from_strl() function will check the length
of the given string before converting it to a UUID.

Follow up #5886
---
https://github.com/tarantool/tarantool/issues/5886
https://github.com/tarantool/tarantool/tree/imeevma/gh-5886-follow-up

 src/lib/uuid/tt_uuid.c     |  2 ++
 test/sql-tap/uuid.test.lua | 19 ++++++++++++++++++-
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/lib/uuid/tt_uuid.c b/src/lib/uuid/tt_uuid.c
index 8bc9bc7af..6bdf2014a 100644
--- a/src/lib/uuid/tt_uuid.c
+++ b/src/lib/uuid/tt_uuid.c
@@ -98,6 +98,8 @@ tt_uuid_str(const struct tt_uuid *uu)
 int
 tt_uuid_from_strl(const char *in, size_t len, struct tt_uuid *uu)
 {
+	if (len != UUID_STR_LEN)
+		return -1;
 	char buf[UUID_STR_LEN + 1];
 	snprintf(buf, sizeof(buf), "%.*s", (int) len, in);
 	return tt_uuid_from_string(buf, uu);
diff --git a/test/sql-tap/uuid.test.lua b/test/sql-tap/uuid.test.lua
index 83fcc3d0e..77ba06c2d 100755
--- a/test/sql-tap/uuid.test.lua
+++ b/test/sql-tap/uuid.test.lua
@@ -3,7 +3,7 @@ local build_path = os.getenv("BUILDDIR")
 package.cpath = build_path..'/test/sql-tap/?.so;'..build_path..'/test/sql-tap/?.dylib;'..package.cpath
 
 local test = require("sqltester")
-test:plan(145)
+test:plan(147)
 
 local uuid = require("uuid")
 local uuid1 = uuid.fromstr("11111111-1111-1111-1111-111111111111")
@@ -1316,6 +1316,23 @@ test:do_execsql_test(
         true
     })
 
+-- Make sure STRING of wrong length cannot be cast to UUID.
+test:do_catchsql_test(
+    "uuid-17.1",
+    [[
+        SELECT CAST('11111111-1111-1111-1111-111111111111111222222222' AS UUID);
+    ]], {
+        1, "Type mismatch: can not convert 11111111-1111-1111-1111-111111111111111222222222 to uuid"
+    })
+
+test:do_catchsql_test(
+    "uuid-17.2",
+    [[
+        SELECT CAST('11111111-1111-1111-1111-11111' AS UUID);
+    ]], {
+        1, "Type mismatch: can not convert 11111111-1111-1111-1111-11111 to uuid"
+    })
+
 test:execsql([[
     DROP TRIGGER t;
     DROP VIEW v;
-- 
2.25.1