Add unit test for base64 encoding.

diff --git a/test/lua/unit/base64.lua b/test/lua/unit/base64.lua
new file mode 100644 (file)
index 0000000..227b911
--- /dev/null
+++ b/test/lua/unit/base64.lua
@@ -0,0 +1,71 @@
+context("Base64 encodning", function()
+  local ffi = require("ffi")
+  ffi.cdef[[
+    void ottery_rand_bytes(void *buf, size_t n);
+    unsigned ottery_rand_unsigned(void);
+    unsigned char* g_base64_decode (const char *in, size_t *outlen);
+    char * rspamd_encode_base64 (const unsigned char *in, size_t inlen, 
+      size_t str_len, size_t *outlen);
+    void g_free(void *ptr);
+    int memcmp(const void *a1, const void *a2, size_t len);
+  ]]
+  
+  local function random_buf(max_size)
+    local l = ffi.C.ottery_rand_unsigned() % max_size + 1
+    local buf = ffi.new("unsigned char[?]", l)
+    ffi.C.ottery_rand_bytes(buf, l)
+    
+    return buf, l
+  end
+  
+  test("Base64 encode test", function()
+    local cases = {
+      {"", ""},
+      {"f", "Zg=="},
+      {"fo", "Zm8="},
+      {"foo", "Zm9v"},
+      {"foob", "Zm9vYg=="},
+      {"fooba", "Zm9vYmE="},
+      {"foobar", "Zm9vYmFy"},
+    }
+    
+    local nl = ffi.new("size_t [1]")
+    for _,c in ipairs(cases) do
+      local b = ffi.C.rspamd_encode_base64(c[1], #c[1], 0, nl)
+      local s = ffi.string(b)
+      ffi.C.g_free(b)
+      assert_equal(s, c[2], s .. " not equal " .. c[2])
+    end
+  end)
+  
+  test("Base64 line split encode test", function()
+    local text = [[
+Man is distinguished, not only by his reason, but by this singular passion from
+other animals, which is a lust of the mind, that by a perseverance of delight
+in the continued and indefatigable generation of knowledge, exceeds the short
+vehemence of any carnal pleasure.]]
+    local b64 = "TWFuIGlzIGRpc3Rpbmd1aXNoZWQsIG5vdCBvbmx5IGJ5IGhpcyByZWFzb24sIGJ1dCBieSB0aGlz\r\nIHNpbmd1bGFyIHBhc3Npb24gZnJvbQpvdGhlciBhbmltYWxzLCB3aGljaCBpcyBhIGx1c3Qgb2Yg\r\ndGhlIG1pbmQsIHRoYXQgYnkgYSBwZXJzZXZlcmFuY2Ugb2YgZGVsaWdodAppbiB0aGUgY29udGlu\r\ndWVkIGFuZCBpbmRlZmF0aWdhYmxlIGdlbmVyYXRpb24gb2Yga25vd2xlZGdlLCBleGNlZWRzIHRo\r\nZSBzaG9ydAp2ZWhlbWVuY2Ugb2YgYW55IGNhcm5hbCBwbGVhc3VyZS4="
+    local nl = ffi.new("size_t [1]")
+    local b = ffi.C.rspamd_encode_base64(text, #text, 76, nl)
+    local cmp = ffi.C.memcmp(b, b64, nl[0])
+    ffi.C.g_free(b)
+    assert_equal(cmp, 0)
+  end)
+  
+  test("Base64 fuzz test", function()
+    for i = 1,1000 do
+      local b, l = random_buf(4096)
+      local nl = ffi.new("size_t [1]")
+      local lim = ffi.C.ottery_rand_unsigned() % 64 + 10
+      local ben = ffi.C.rspamd_encode_base64(b, l, lim, nl)
+      local bs = ffi.string(ben)
+      local ol = ffi.new("size_t [1]")
+      local nb = ffi.C.g_base64_decode(ben, ol)
+      
+      local cmp = ffi.C.memcmp(b, nb, l)
+      ffi.C.g_free(ben)
+      ffi.C.g_free(nb)
+      assert_equal(cmp, 0, "fuzz test failed for length: " .. tostring(l))
+    end
+  end)
+end)
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