Add support to multiple validate_claims constraints

lib/resty/libjwt/utils.lua

@@ -72,10 +72,7 @@ function _M.get_token(headers, field_token)
     return jwtToken[2], ""
 end
 
-function _M.validate_claims(validate_claims, claims)
-    if not validate_claims then
-        return ""
-    end
+local function validate_claims_inner(validate_claims, claims)
     for claim_name, validation in pairs(validate_claims) do
         local claim_value = claims[claim_name]
         if claim_value == nil then
@@ -107,4 +104,44 @@ function _M.validate_claims(validate_claims, claims)
     return ""
 end
 
+local function is_array_of_tables(t)
+    if type(t) ~= "table" then
+        return false
+     end
+
+    local i = 0
+    for _ in pairs(t) do
+        i = i + 1
+        if t[i] == nil then
+            return false
+        end
+
+        if type(t[i]) ~= "table" then
+            return false
+        end
+
+    end
+    return true
+end
+
+function _M.validate_claims(validate_claims, claims)
+    if not validate_claims then return "" end
+
+    if is_array_of_tables(validate_claims) then
+        local errors = {}
+        for i, v in ipairs(validate_claims) do
+
+            local result = validate_claims_inner(v, claims)
+            if result == "" then return "" end
+
+            table.insert(errors, "validate_claims constraint number " .. i ..
+                             ": " .. result)
+        end
+
+        return table.concat(errors, " OR ")
+    end
+
+    return validate_claims_inner(validate_claims, claims)
+end
+
 return _M

test/validate_claims_test.lua

@@ -66,4 +66,38 @@ function TestShouldReturnOkInValidation()
     lu.assertEquals(err, "")
 end
 
+function TestShouldSupportArray()
+    local params = {
+        {
+            iss = {exact = "tsuru"},
+            aud = {one_of = {"audience1", "audience2"}},
+            sub = {pattern = ".*@g%.globo"}
+        }, {
+            iss = {exact = "kubernetes"},
+            aud = {one_of = {"audience3", "audience4"}},
+            sub = {pattern = ".*@corp%.globo%.com"}
+        }
+    }
+    local claims = {
+        iss = "tsuru",
+        aud = "audience1",
+        sub = "[email protected]"
+    }
+    local err
+    err = utils.validate_claims(params, claims)
+    lu.assertEquals(err, "")
+
+    claims = {
+        iss = "kubernetes",
+        aud = "audience4",
+        sub = "[email protected]"
+    }
+    err = utils.validate_claims(params, claims)
+    lu.assertEquals(err, "")
+
+    claims = {iss = "tsuru", aud = "audience4", sub = "[email protected]"}
+    err = utils.validate_claims(params, claims)
+    lu.assertNotEquals(err, "")
+end
+
 os.exit(lu.LuaUnit.run())