| /* | 
 |  *  Copyright 2011 The WebRTC Project Authors. All rights reserved. | 
 |  * | 
 |  *  Use of this source code is governed by a BSD-style license | 
 |  *  that can be found in the LICENSE file in the root of the source | 
 |  *  tree. An additional intellectual property rights grant can be found | 
 |  *  in the file PATENTS.  All contributing project authors may | 
 |  *  be found in the AUTHORS file in the root of the source tree. | 
 |  */ | 
 |  | 
 | #include "webrtc/base/common.h" | 
 | #include "webrtc/base/base64.h" | 
 | #include "webrtc/base/gunit.h" | 
 | #include "webrtc/base/logging.h" | 
 | #include "webrtc/base/stringutils.h" | 
 | #include "webrtc/base/stream.h" | 
 |  | 
 | #include "webrtc/base/testbase64.h" | 
 |  | 
 | using namespace std; | 
 | using namespace rtc; | 
 |  | 
 | static struct { | 
 |   size_t plain_length; | 
 |   const char* plaintext; | 
 |   const char* cyphertext; | 
 | } base64_tests[] = { | 
 |  | 
 |   // Basic bit patterns; | 
 |   // values obtained with "echo -n '...' | uuencode -m test" | 
 |  | 
 |   { 1, "\000", "AA==" }, | 
 |   { 1, "\001", "AQ==" }, | 
 |   { 1, "\002", "Ag==" }, | 
 |   { 1, "\004", "BA==" }, | 
 |   { 1, "\010", "CA==" }, | 
 |   { 1, "\020", "EA==" }, | 
 |   { 1, "\040", "IA==" }, | 
 |   { 1, "\100", "QA==" }, | 
 |   { 1, "\200", "gA==" }, | 
 |  | 
 |   { 1, "\377", "/w==" }, | 
 |   { 1, "\376", "/g==" }, | 
 |   { 1, "\375", "/Q==" }, | 
 |   { 1, "\373", "+w==" }, | 
 |   { 1, "\367", "9w==" }, | 
 |   { 1, "\357", "7w==" }, | 
 |   { 1, "\337", "3w==" }, | 
 |   { 1, "\277", "vw==" }, | 
 |   { 1, "\177", "fw==" }, | 
 |   { 2, "\000\000", "AAA=" }, | 
 |   { 2, "\000\001", "AAE=" }, | 
 |   { 2, "\000\002", "AAI=" }, | 
 |   { 2, "\000\004", "AAQ=" }, | 
 |   { 2, "\000\010", "AAg=" }, | 
 |   { 2, "\000\020", "ABA=" }, | 
 |   { 2, "\000\040", "ACA=" }, | 
 |   { 2, "\000\100", "AEA=" }, | 
 |   { 2, "\000\200", "AIA=" }, | 
 |   { 2, "\001\000", "AQA=" }, | 
 |   { 2, "\002\000", "AgA=" }, | 
 |   { 2, "\004\000", "BAA=" }, | 
 |   { 2, "\010\000", "CAA=" }, | 
 |   { 2, "\020\000", "EAA=" }, | 
 |   { 2, "\040\000", "IAA=" }, | 
 |   { 2, "\100\000", "QAA=" }, | 
 |   { 2, "\200\000", "gAA=" }, | 
 |  | 
 |   { 2, "\377\377", "//8=" }, | 
 |   { 2, "\377\376", "//4=" }, | 
 |   { 2, "\377\375", "//0=" }, | 
 |   { 2, "\377\373", "//s=" }, | 
 |   { 2, "\377\367", "//c=" }, | 
 |   { 2, "\377\357", "/+8=" }, | 
 |   { 2, "\377\337", "/98=" }, | 
 |   { 2, "\377\277", "/78=" }, | 
 |   { 2, "\377\177", "/38=" }, | 
 |   { 2, "\376\377", "/v8=" }, | 
 |   { 2, "\375\377", "/f8=" }, | 
 |   { 2, "\373\377", "+/8=" }, | 
 |   { 2, "\367\377", "9/8=" }, | 
 |   { 2, "\357\377", "7/8=" }, | 
 |   { 2, "\337\377", "3/8=" }, | 
 |   { 2, "\277\377", "v/8=" }, | 
 |   { 2, "\177\377", "f/8=" }, | 
 |  | 
 |   { 3, "\000\000\000", "AAAA" }, | 
 |   { 3, "\000\000\001", "AAAB" }, | 
 |   { 3, "\000\000\002", "AAAC" }, | 
 |   { 3, "\000\000\004", "AAAE" }, | 
 |   { 3, "\000\000\010", "AAAI" }, | 
 |   { 3, "\000\000\020", "AAAQ" }, | 
 |   { 3, "\000\000\040", "AAAg" }, | 
 |   { 3, "\000\000\100", "AABA" }, | 
 |   { 3, "\000\000\200", "AACA" }, | 
 |   { 3, "\000\001\000", "AAEA" }, | 
 |   { 3, "\000\002\000", "AAIA" }, | 
 |   { 3, "\000\004\000", "AAQA" }, | 
 |   { 3, "\000\010\000", "AAgA" }, | 
 |   { 3, "\000\020\000", "ABAA" }, | 
 |   { 3, "\000\040\000", "ACAA" }, | 
 |   { 3, "\000\100\000", "AEAA" }, | 
 |   { 3, "\000\200\000", "AIAA" }, | 
 |   { 3, "\001\000\000", "AQAA" }, | 
 |   { 3, "\002\000\000", "AgAA" }, | 
 |   { 3, "\004\000\000", "BAAA" }, | 
 |   { 3, "\010\000\000", "CAAA" }, | 
 |   { 3, "\020\000\000", "EAAA" }, | 
 |   { 3, "\040\000\000", "IAAA" }, | 
 |   { 3, "\100\000\000", "QAAA" }, | 
 |   { 3, "\200\000\000", "gAAA" }, | 
 |  | 
 |   { 3, "\377\377\377", "////" }, | 
 |   { 3, "\377\377\376", "///+" }, | 
 |   { 3, "\377\377\375", "///9" }, | 
 |   { 3, "\377\377\373", "///7" }, | 
 |   { 3, "\377\377\367", "///3" }, | 
 |   { 3, "\377\377\357", "///v" }, | 
 |   { 3, "\377\377\337", "///f" }, | 
 |   { 3, "\377\377\277", "//+/" }, | 
 |   { 3, "\377\377\177", "//9/" }, | 
 |   { 3, "\377\376\377", "//7/" }, | 
 |   { 3, "\377\375\377", "//3/" }, | 
 |   { 3, "\377\373\377", "//v/" }, | 
 |   { 3, "\377\367\377", "//f/" }, | 
 |   { 3, "\377\357\377", "/+//" }, | 
 |   { 3, "\377\337\377", "/9//" }, | 
 |   { 3, "\377\277\377", "/7//" }, | 
 |   { 3, "\377\177\377", "/3//" }, | 
 |   { 3, "\376\377\377", "/v//" }, | 
 |   { 3, "\375\377\377", "/f//" }, | 
 |   { 3, "\373\377\377", "+///" }, | 
 |   { 3, "\367\377\377", "9///" }, | 
 |   { 3, "\357\377\377", "7///" }, | 
 |   { 3, "\337\377\377", "3///" }, | 
 |   { 3, "\277\377\377", "v///" }, | 
 |   { 3, "\177\377\377", "f///" }, | 
 |  | 
 |   // Random numbers: values obtained with | 
 |   // | 
 |   //  #! /bin/bash | 
 |   //  dd bs=$1 count=1 if=/dev/random of=/tmp/bar.random | 
 |   //  od -N $1 -t o1 /tmp/bar.random | 
 |   //  uuencode -m test < /tmp/bar.random | 
 |   // | 
 |   // where $1 is the number of bytes (2, 3) | 
 |  | 
 |   { 2, "\243\361", "o/E=" }, | 
 |   { 2, "\024\167", "FHc=" }, | 
 |   { 2, "\313\252", "y6o=" }, | 
 |   { 2, "\046\041", "JiE=" }, | 
 |   { 2, "\145\236", "ZZ4=" }, | 
 |   { 2, "\254\325", "rNU=" }, | 
 |   { 2, "\061\330", "Mdg=" }, | 
 |   { 2, "\245\032", "pRo=" }, | 
 |   { 2, "\006\000", "BgA=" }, | 
 |   { 2, "\375\131", "/Vk=" }, | 
 |   { 2, "\303\210", "w4g=" }, | 
 |   { 2, "\040\037", "IB8=" }, | 
 |   { 2, "\261\372", "sfo=" }, | 
 |   { 2, "\335\014", "3Qw=" }, | 
 |   { 2, "\233\217", "m48=" }, | 
 |   { 2, "\373\056", "+y4=" }, | 
 |   { 2, "\247\232", "p5o=" }, | 
 |   { 2, "\107\053", "Rys=" }, | 
 |   { 2, "\204\077", "hD8=" }, | 
 |   { 2, "\276\211", "vok=" }, | 
 |   { 2, "\313\110", "y0g=" }, | 
 |   { 2, "\363\376", "8/4=" }, | 
 |   { 2, "\251\234", "qZw=" }, | 
 |   { 2, "\103\262", "Q7I=" }, | 
 |   { 2, "\142\312", "Yso=" }, | 
 |   { 2, "\067\211", "N4k=" }, | 
 |   { 2, "\220\001", "kAE=" }, | 
 |   { 2, "\152\240", "aqA=" }, | 
 |   { 2, "\367\061", "9zE=" }, | 
 |   { 2, "\133\255", "W60=" }, | 
 |   { 2, "\176\035", "fh0=" }, | 
 |   { 2, "\032\231", "Gpk=" }, | 
 |  | 
 |   { 3, "\013\007\144", "Cwdk" }, | 
 |   { 3, "\030\112\106", "GEpG" }, | 
 |   { 3, "\047\325\046", "J9Um" }, | 
 |   { 3, "\310\160\022", "yHAS" }, | 
 |   { 3, "\131\100\237", "WUCf" }, | 
 |   { 3, "\064\342\134", "NOJc" }, | 
 |   { 3, "\010\177\004", "CH8E" }, | 
 |   { 3, "\345\147\205", "5WeF" }, | 
 |   { 3, "\300\343\360", "wOPw" }, | 
 |   { 3, "\061\240\201", "MaCB" }, | 
 |   { 3, "\225\333\044", "ldsk" }, | 
 |   { 3, "\215\137\352", "jV/q" }, | 
 |   { 3, "\371\147\160", "+Wdw" }, | 
 |   { 3, "\030\320\051", "GNAp" }, | 
 |   { 3, "\044\174\241", "JHyh" }, | 
 |   { 3, "\260\127\037", "sFcf" }, | 
 |   { 3, "\111\045\033", "SSUb" }, | 
 |   { 3, "\202\114\107", "gkxH" }, | 
 |   { 3, "\057\371\042", "L/ki" }, | 
 |   { 3, "\223\247\244", "k6ek" }, | 
 |   { 3, "\047\216\144", "J45k" }, | 
 |   { 3, "\203\070\327", "gzjX" }, | 
 |   { 3, "\247\140\072", "p2A6" }, | 
 |   { 3, "\124\115\116", "VE1O" }, | 
 |   { 3, "\157\162\050", "b3Io" }, | 
 |   { 3, "\357\223\004", "75ME" }, | 
 |   { 3, "\052\117\156", "Kk9u" }, | 
 |   { 3, "\347\154\000", "52wA" }, | 
 |   { 3, "\303\012\142", "wwpi" }, | 
 |   { 3, "\060\035\362", "MB3y" }, | 
 |   { 3, "\130\226\361", "WJbx" }, | 
 |   { 3, "\173\013\071", "ews5" }, | 
 |   { 3, "\336\004\027", "3gQX" }, | 
 |   { 3, "\357\366\234", "7/ac" }, | 
 |   { 3, "\353\304\111", "68RJ" }, | 
 |   { 3, "\024\264\131", "FLRZ" }, | 
 |   { 3, "\075\114\251", "PUyp" }, | 
 |   { 3, "\315\031\225", "zRmV" }, | 
 |   { 3, "\154\201\276", "bIG+" }, | 
 |   { 3, "\200\066\072", "gDY6" }, | 
 |   { 3, "\142\350\267", "Yui3" }, | 
 |   { 3, "\033\000\166", "GwB2" }, | 
 |   { 3, "\210\055\077", "iC0/" }, | 
 |   { 3, "\341\037\124", "4R9U" }, | 
 |   { 3, "\161\103\152", "cUNq" }, | 
 |   { 3, "\270\142\131", "uGJZ" }, | 
 |   { 3, "\337\076\074", "3z48" }, | 
 |   { 3, "\375\106\362", "/Uby" }, | 
 |   { 3, "\227\301\127", "l8FX" }, | 
 |   { 3, "\340\002\234", "4AKc" }, | 
 |   { 3, "\121\064\033", "UTQb" }, | 
 |   { 3, "\157\134\143", "b1xj" }, | 
 |   { 3, "\247\055\327", "py3X" }, | 
 |   { 3, "\340\142\005", "4GIF" }, | 
 |   { 3, "\060\260\143", "MLBj" }, | 
 |   { 3, "\075\203\170", "PYN4" }, | 
 |   { 3, "\143\160\016", "Y3AO" }, | 
 |   { 3, "\313\013\063", "ywsz" }, | 
 |   { 3, "\174\236\135", "fJ5d" }, | 
 |   { 3, "\103\047\026", "QycW" }, | 
 |   { 3, "\365\005\343", "9QXj" }, | 
 |   { 3, "\271\160\223", "uXCT" }, | 
 |   { 3, "\362\255\172", "8q16" }, | 
 |   { 3, "\113\012\015", "SwoN" }, | 
 |  | 
 |   // various lengths, generated by this python script: | 
 |   // | 
 |   // from string import lowercase as lc | 
 |   // for i in range(27): | 
 |   //   print '{ %2d, "%s",%s "%s" },' % (i, lc[:i], ' ' * (26-i), | 
 |   //                                     lc[:i].encode('base64').strip()) | 
 |  | 
 |   {  0, "abcdefghijklmnopqrstuvwxyz", "" }, | 
 |   {  1, "abcdefghijklmnopqrstuvwxyz", "YQ==" }, | 
 |   {  2, "abcdefghijklmnopqrstuvwxyz", "YWI=" }, | 
 |   {  3, "abcdefghijklmnopqrstuvwxyz", "YWJj" }, | 
 |   {  4, "abcdefghijklmnopqrstuvwxyz", "YWJjZA==" }, | 
 |   {  5, "abcdefghijklmnopqrstuvwxyz", "YWJjZGU=" }, | 
 |   {  6, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVm" }, | 
 |   {  7, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZw==" }, | 
 |   {  8, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2g=" }, | 
 |   {  9, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hp" }, | 
 |   { 10, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpag==" }, | 
 |   { 11, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpams=" }, | 
 |   { 12, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamts" }, | 
 |   { 13, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbQ==" }, | 
 |   { 14, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW4=" }, | 
 |   { 15, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5v" }, | 
 |   { 16, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5vcA==" }, | 
 |   { 17, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5vcHE=" }, | 
 |   { 18, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5vcHFy" }, | 
 |   { 19, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5vcHFycw==" }, | 
 |   { 20, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5vcHFyc3Q=" }, | 
 |   { 21, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5vcHFyc3R1" }, | 
 |   { 22, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dg==" }, | 
 |   { 23, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnc=" }, | 
 |   { 24, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4" }, | 
 |   { 25, "abcdefghijklmnopqrstuvwxy",  "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eQ==" }, | 
 |   { 26, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXo=" }, | 
 | }; | 
 | #if 0 | 
 | static struct { | 
 |   const char* plaintext; | 
 |   const char* cyphertext; | 
 | } base64_strings[] = { | 
 |  | 
 |   // The first few Google quotes | 
 |   // Cyphertext created with "uuencode - GNU sharutils 4.2.1" | 
 |   { | 
 |     "Everyone!  We're teetering on the brink of disaster." | 
 |     " - Sergey Brin, 6/24/99, regarding the company's state " | 
 |     "after the unleashing of Netscape/Google search", | 
 |  | 
 |     "RXZlcnlvbmUhICBXZSdyZSB0ZWV0ZXJpbmcgb24gdGhlIGJyaW5rIG9mIGRp" | 
 |     "c2FzdGVyLiAtIFNlcmdleSBCcmluLCA2LzI0Lzk5LCByZWdhcmRpbmcgdGhl" | 
 |     "IGNvbXBhbnkncyBzdGF0ZSBhZnRlciB0aGUgdW5sZWFzaGluZyBvZiBOZXRz" | 
 |     "Y2FwZS9Hb29nbGUgc2VhcmNo" }, | 
 |  | 
 |   { | 
 |     "I'm not sure why we're still alive, but we seem to be." | 
 |     " - Larry Page, 6/24/99, while hiding in the kitchenette " | 
 |     "during the Netscape traffic overflow", | 
 |  | 
 |     "SSdtIG5vdCBzdXJlIHdoeSB3ZSdyZSBzdGlsbCBhbGl2ZSwgYnV0IHdlIHNl" | 
 |     "ZW0gdG8gYmUuIC0gTGFycnkgUGFnZSwgNi8yNC85OSwgd2hpbGUgaGlkaW5n" | 
 |     "IGluIHRoZSBraXRjaGVuZXR0ZSBkdXJpbmcgdGhlIE5ldHNjYXBlIHRyYWZm" | 
 |     "aWMgb3ZlcmZsb3c" }, | 
 |  | 
 |   { | 
 |     "I think kids want porn." | 
 |     " - Sergey Brin, 6/99, on why Google shouldn't prioritize a " | 
 |     "filtered search for children and families", | 
 |  | 
 |     "SSB0aGluayBraWRzIHdhbnQgcG9ybi4gLSBTZXJnZXkgQnJpbiwgNi85OSwg" | 
 |     "b24gd2h5IEdvb2dsZSBzaG91bGRuJ3QgcHJpb3JpdGl6ZSBhIGZpbHRlcmVk" | 
 |     "IHNlYXJjaCBmb3IgY2hpbGRyZW4gYW5kIGZhbWlsaWVz" }, | 
 | }; | 
 | #endif | 
 | // Compare bytes 0..len-1 of x and y.  If not equal, abort with verbose error | 
 | // message showing position and numeric value that differed. | 
 | // Handles embedded nulls just like any other byte. | 
 | // Only added because string.compare() in gcc-3.3.3 seems to misbehave with | 
 | // embedded nulls. | 
 | // TODO: switch back to string.compare() if/when gcc is fixed | 
 | #define EXPECT_EQ_ARRAY(len, x, y, msg)                      \ | 
 |   for (size_t j = 0; j < len; ++j) {                           \ | 
 |     if (x[j] != y[j]) {                                     \ | 
 |         LOG(LS_ERROR) << "" # x << " != " # y                  \ | 
 |                    << " byte " << j << " msg: " << msg;     \ | 
 |       }                                                     \ | 
 |     } | 
 |  | 
 | size_t Base64Escape(const unsigned char *src, size_t szsrc, char *dest, | 
 |                     size_t szdest) { | 
 |   std::string escaped; | 
 |   Base64::EncodeFromArray((const char *)src, szsrc, &escaped); | 
 |   memcpy(dest, escaped.data(), min(escaped.size(), szdest)); | 
 |   return escaped.size(); | 
 | } | 
 |  | 
 | size_t Base64Unescape(const char *src, size_t szsrc, char *dest, | 
 |                       size_t szdest) { | 
 |   std::string unescaped; | 
 |   EXPECT_TRUE(Base64::DecodeFromArray(src, szsrc, Base64::DO_LAX, &unescaped, | 
 |                                       NULL)); | 
 |   memcpy(dest, unescaped.data(), min(unescaped.size(), szdest)); | 
 |   return unescaped.size(); | 
 | } | 
 |  | 
 | size_t Base64Unescape(const char *src, size_t szsrc, string *s) { | 
 |   EXPECT_TRUE(Base64::DecodeFromArray(src, szsrc, Base64::DO_LAX, s, NULL)); | 
 |   return s->size(); | 
 | } | 
 |  | 
 | TEST(Base64, EncodeDecodeBattery) { | 
 |   LOG(LS_VERBOSE) << "Testing base-64"; | 
 |  | 
 |   size_t i; | 
 |  | 
 |   // Check the short strings; this tests the math (and boundaries) | 
 |   for( i = 0; i < sizeof(base64_tests) / sizeof(base64_tests[0]); ++i ) { | 
 |     char encode_buffer[100]; | 
 |     size_t encode_length; | 
 |     char decode_buffer[100]; | 
 |     size_t decode_length; | 
 |     size_t cypher_length; | 
 |  | 
 |     LOG(LS_VERBOSE) << "B64: " << base64_tests[i].cyphertext; | 
 |  | 
 |     const unsigned char* unsigned_plaintext = | 
 |       reinterpret_cast<const unsigned char*>(base64_tests[i].plaintext); | 
 |  | 
 |     cypher_length = strlen(base64_tests[i].cyphertext); | 
 |  | 
 |     // The basic escape function: | 
 |     memset(encode_buffer, 0, sizeof(encode_buffer)); | 
 |     encode_length = Base64Escape(unsigned_plaintext, | 
 |                                  base64_tests[i].plain_length, | 
 |                                  encode_buffer, | 
 |                                  sizeof(encode_buffer)); | 
 |     //    Is it of the expected length? | 
 |     EXPECT_EQ(encode_length, cypher_length); | 
 |  | 
 |     //    Is it the expected encoded value? | 
 |     EXPECT_STREQ(encode_buffer, base64_tests[i].cyphertext); | 
 |  | 
 |     // If we encode it into a buffer of exactly the right length... | 
 |     memset(encode_buffer, 0, sizeof(encode_buffer)); | 
 |     encode_length = Base64Escape(unsigned_plaintext, | 
 |                                  base64_tests[i].plain_length, | 
 |                                  encode_buffer, | 
 |                                  cypher_length); | 
 |     //    Is it still of the expected length? | 
 |     EXPECT_EQ(encode_length, cypher_length); | 
 |  | 
 |     //    And is the value still correct?  (i.e., not losing the last byte) | 
 |     EXPECT_STREQ(encode_buffer, base64_tests[i].cyphertext); | 
 |  | 
 |     // If we decode it back: | 
 |     memset(decode_buffer, 0, sizeof(decode_buffer)); | 
 |     decode_length = Base64Unescape(encode_buffer, | 
 |                                    cypher_length, | 
 |                                    decode_buffer, | 
 |                                    sizeof(decode_buffer)); | 
 |  | 
 |     //    Is it of the expected length? | 
 |     EXPECT_EQ(decode_length, base64_tests[i].plain_length); | 
 |  | 
 |     //    Is it the expected decoded value? | 
 |     EXPECT_EQ(0,  memcmp(decode_buffer, base64_tests[i].plaintext, decode_length)); | 
 |  | 
 |     // Our decoder treats the padding '=' characters at the end as | 
 |     // optional.  If encode_buffer has any, run some additional | 
 |     // tests that fiddle with them. | 
 |     char* first_equals = strchr(encode_buffer, '='); | 
 |     if (first_equals) { | 
 |       // How many equals signs does the string start with? | 
 |       int equals = (*(first_equals+1) == '=') ? 2 : 1; | 
 |  | 
 |       // Try chopping off the equals sign(s) entirely.  The decoder | 
 |       // should still be okay with this. | 
 |       string decoded2("this junk should also be ignored"); | 
 |       *first_equals = '\0'; | 
 |       EXPECT_NE(0U, Base64Unescape(encode_buffer, first_equals-encode_buffer, | 
 |                            &decoded2)); | 
 |       EXPECT_EQ(decoded2.size(), base64_tests[i].plain_length); | 
 |       EXPECT_EQ_ARRAY(decoded2.size(), decoded2.data(), base64_tests[i].plaintext, i); | 
 |  | 
 |       size_t len; | 
 |  | 
 |       // try putting some extra stuff after the equals signs, or in between them | 
 |       if (equals == 2) { | 
 |         sprintfn(first_equals, 6, " = = "); | 
 |         len = first_equals - encode_buffer + 5; | 
 |       } else { | 
 |         sprintfn(first_equals, 6, " = "); | 
 |         len = first_equals - encode_buffer + 3; | 
 |       } | 
 |       decoded2.assign("this junk should be ignored"); | 
 |       EXPECT_NE(0U, Base64Unescape(encode_buffer, len, &decoded2)); | 
 |       EXPECT_EQ(decoded2.size(), base64_tests[i].plain_length); | 
 |       EXPECT_EQ_ARRAY(decoded2.size(), decoded2, base64_tests[i].plaintext, i); | 
 |     } | 
 |   } | 
 | } | 
 |  | 
 | // here's a weird case: a giant base64 encoded stream which broke our base64 | 
 | // decoding.  Let's test it explicitly. | 
 | const char SpecificTest[] = | 
 |   "/9j/4AAQSkZJRgABAgEASABIAAD/4Q0HRXhpZgAATU0AKgAAAAgADAEOAAIAAAAgAAAAngEPAAI\n" | 
 |   "AAAAFAAAAvgEQAAIAAAAJAAAAwwESAAMAAAABAAEAAAEaAAUAAAABAAAAzAEbAAUAAAABAAAA1A\n" | 
 |   "EoAAMAAAABAAIAAAExAAIAAAAUAAAA3AEyAAIAAAAUAAAA8AE8AAIAAAAQAAABBAITAAMAAAABA\n" | 
 |   "AIAAIdpAAQAAAABAAABFAAAAsQgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgAFNPTlkA\n" | 
 |   "RFNDLVAyMDAAAAAASAAAAAEAAABIAAAAAUFkb2JlIFBob3Rvc2hvcCA3LjAAMjAwNzowMTozMCA\n" | 
 |   "yMzoxMDowNABNYWMgT1MgWCAxMC40LjgAAByCmgAFAAAAAQAAAmqCnQAFAAAAAQAAAnKIIgADAA\n" | 
 |   "AAAQACAACIJwADAAAAAQBkAACQAAAHAAAABDAyMjCQAwACAAAAFAAAAnqQBAACAAAAFAAAAo6RA\n" | 
 |   "QAHAAAABAECAwCRAgAFAAAAAQAAAqKSBAAKAAAAAQAAAqqSBQAFAAAAAQAAArKSBwADAAAAAQAF\n" | 
 |   "AACSCAADAAAAAQAAAACSCQADAAAAAQAPAACSCgAFAAAAAQAAArqgAAAHAAAABDAxMDCgAQADAAA\n" | 
 |   "AAf//AACgAgAEAAAAAQAAAGSgAwAEAAAAAQAAAGSjAAAHAAAAAQMAAACjAQAHAAAAAQEAAACkAQ\n" | 
 |   "ADAAAAAQAAAACkAgADAAAAAQAAAACkAwADAAAAAQAAAACkBgADAAAAAQAAAACkCAADAAAAAQAAA\n" | 
 |   "ACkCQADAAAAAQAAAACkCgADAAAAAQAAAAAAAAAAAAAACgAAAZAAAAAcAAAACjIwMDc6MDE6MjAg\n" | 
 |   "MjM6MDU6NTIAMjAwNzowMToyMCAyMzowNTo1MgAAAAAIAAAAAQAAAAAAAAAKAAAAMAAAABAAAAB\n" | 
 |   "PAAAACgAAAAYBAwADAAAAAQAGAAABGgAFAAAAAQAAAxIBGwAFAAAAAQAAAxoBKAADAAAAAQACAA\n" | 
 |   "ACAQAEAAAAAQAAAyICAgAEAAAAAQAACd0AAAAAAAAASAAAAAEAAABIAAAAAf/Y/+AAEEpGSUYAA\n" | 
 |   "QIBAEgASAAA/+0ADEFkb2JlX0NNAAL/7gAOQWRvYmUAZIAAAAAB/9sAhAAMCAgICQgMCQkMEQsK\n" | 
 |   "CxEVDwwMDxUYExMVExMYEQwMDAwMDBEMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMAQ0LCw0\n" | 
 |   "ODRAODhAUDg4OFBQODg4OFBEMDAwMDBERDAwMDAwMEQwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDA\n" | 
 |   "wMDAz/wAARCABkAGQDASIAAhEBAxEB/90ABAAH/8QBPwAAAQUBAQEBAQEAAAAAAAAAAwABAgQFB\n" | 
 |   "gcICQoLAQABBQEBAQEBAQAAAAAAAAABAAIDBAUGBwgJCgsQAAEEAQMCBAIFBwYIBQMMMwEAAhED\n" | 
 |   "BCESMQVBUWETInGBMgYUkaGxQiMkFVLBYjM0coLRQwclklPw4fFjczUWorKDJkSTVGRFwqN0Nhf\n" | 
 |   "SVeJl8rOEw9N14/NGJ5SkhbSVxNTk9KW1xdXl9VZmdoaWprbG1ub2N0dXZ3eHl6e3x9fn9xEAAg\n" | 
 |   "IBAgQEAwQFBgcHBgU1AQACEQMhMRIEQVFhcSITBTKBkRShsUIjwVLR8DMkYuFygpJDUxVjczTxJ\n" | 
 |   "QYWorKDByY1wtJEk1SjF2RFVTZ0ZeLys4TD03Xj80aUpIW0lcTU5PSltcXV5fVWZnaGlqa2xtbm\n" | 
 |   "9ic3R1dnd4eXp7fH/9oADAMBAAIRAxEAPwDy7bKNTUXNLz9EaJPDWMjxH4ozhtpYwaACT8ShaaW\n" | 
 |   "bW0uEc9/JFfjj0Q4Hk/PRDxwX7y47W9z/AN9Cv4+O3ILK2DcRqT2CaSvEbcl1Jbz37KG1dBldLo\n" | 
 |   "qaS4l9xGjG9v6yoDAdYIaIjUk+AREgo4y5sapirb8Yl0NHHdKvBNm4yA1o5Pc+SPEFvCWqB3HZF\n" | 
 |   "Hj2SbWQ/afGFP0bHP8ATY0uc4w1o1JPkkimGiS2KvqlnmBkOZQTyydzgPMM9v8A0lp4v1Nx9gF1\n" | 
 |   "tpdqJaGtH/S3I0i3lISXW/8AMqnd/O2bfg2eUkqVYf/Q8zuncO4Bj7lZ+n7f5Mj5KsJcY8NUZ4d\n" | 
 |   "uEDVo1HkeU0rg3Om4H2rabCWUN7DQuK1n5FWKW4uCwG92gDRJBS6exhxmMboQI+Cv4WFTQ42Bs2\n" | 
 |   "fvnkkqEmy2YxoMMbpVzaz6jt+RbpHZs8lzkHqrasKkYOKP0jgDfZ4N/wDM1tNrcWfSPmRyq9uNV\n" | 
 |   "DnFg2s97i7UkjxKVrq0eVz3spZsja+ASDzwsh9jnOk/JFzb3XZD3v1c4yT8UACTCniKDUnKz5Nj\n" | 
 |   "G33XV1DV73BrT8dF23SejV4zg9g33cOsPb+SxVvqv9ViwNy8vS0iWs/daf8A0Y5dpTi1sADGxCR\n" | 
 |   "K1o0YBEmInlXWYbDBcDLdPJXa8f71Yrx2jnUoAqLnfZK5hJaW2vdwEk5a/wD/0fN6Ia/e76IiVf\n" | 
 |   "xavUL7CPpnT4LNbYXAVjuQt/AqDmNYO/Kjnoy4hr5J8SwMhrRMaeSvbsxrfUazcOw4UX0Cisem2\n" | 
 |   "SBoD4+Kz8nC6llbSLCRrubJA8kwUWbUDa29X1PMa7aQWjuDC0MXMdbDbhI7eazBiUfZ6GOYRe1s\n" | 
 |   "WvGgJ8Vbw2+m4Bx9s6JpNHuuGo1FF53r/SHYua61gLse0lzXeBP5rkvqx0o5vVWz7WY49QkiQSP\n" | 
 |   "oN/tLoevW/ogxv0HA7tJ0AnhT+pdDGYVl/wCdcTPkGn2NU0JWNWvlgAbHV6fEqdu2gR/r2WlWwt\n" | 
 |   "AA5VXAEsLXTqJafArQY5rRr9LiPBJiZsZCI1pJjxCi0j4oncSICSkWwzwkjeaSch//0vO7sP7Lm\n" | 
 |   "enO9ogtd5FbPT3Q5pCpZVc4ld3Lmn3O8j9EI2BYdunKjOobMQIyI+rusc2wx4d0eutwGnHh/uQc\n" | 
 |   "Ha7ladj6mVANGvcqOgz0Go7HJ12/GEHcwvB/dPY6ImbbaMaASGuIBjkN7qofs9Ubg9g7OI9p/t/\n" | 
 |   "RTSmhTHr0v6eSz6UgCPP2/wAVu9Ex2V49dVY2iACB4BZeVXQ/AJ3gzGnnOi2+kACpru8flUsNmt\n" | 
 |   "zHRf6xfWCnoeAfTh2ZaQKazx/Ke7+QxcKz61fWA2uuObaC4zGhaPJrXBL64ZFmR124O09ENraPK\n" | 
 |   "N3/AH5GqxIrZVUyp2K2vfdkENsDnxuex9m4Ox9n82xSgNd9D+p/XR1npgseR9ppOy4Dx/NfH/CL\n" | 
 |   "oQJGunmvMv8AFq3KHVcq3HkYQbD2nuSf0I/rMavSg6TLjLigQhJ7Z58v9QkmlsTOqSCn/9PzL7R\n" | 
 |   "d6Qq3n0wZ2zotXpT9xLfFYvkr/S7jXeB8E0jRkhKpC3q8LcJ/kmCrTnkuAPCq4do9Q/ytVbuAeY\n" | 
 |   "Gg5lQybQK+82GBqEQUA1kOHPYf3LLsoyN36G5w8iUfHxepbXE2l0cApALgLHzBq9UxhTXU5hMC1\n" | 
 |   "ktnSCup6S4Ctk+C5XqVGcaHPfuiuHkeTTuWz0+9zaKiH6CC0/yXBSQ2a/MxojV57634rq+v2PLY\n" | 
 |   "be1r2nsYG13/AFKxbfCBMcr0brGAzrGEwCG31ncx0SfBzf7S4+zoHUWWsJq3hz9oLfcBH77R9H+\n" | 
 |   "0pA13u/qPgDp/Q6ri39JlfpXkDx+h/msWn1L6wdO6bSbcrIbU2Q0xLnSe21kuVejJspbVS5+4bd\n" | 
 |   "ocBAkD/orG+tP1ar67Wy7GtZTm1SCXfRsb+a18fRe38x6SG3/44H1Z3f0y2I+l6DoSXD/8xPrDs\n" | 
 |   "3enVu3bdnqN3R+//USSVo//1PLohhce+gRWS0Nsby3lRgFkKxQyW7SgUh3em5Tbq2uB9wWw1wey\n" | 
 |   "J1XGV2XYdm5k7e4WzidXY9oMwo5RZ4T6Hd1ixwfp96PWbAJBVTHzK7O6Ky5oJB1HZMqmUEFlkGy\n" | 
 |   "xpa4zI1Hkq31dy7bMN9BAc3HeWAnnbyxEycmuup1jiAGglZ31PyrmZ9tQg1WtNj54EHR3/S2qTH\n" | 
 |   "1Yc5GgD1FFtzPdWGkd2AyflogZmRmsz6PSrbXbdo+txOrP337f3fzVo15DK2uyrTtqpBOnBKx6b\n" | 
 |   "7MjJsz7tHWOAYP3WD6LU6cqGjFCNl1MmvLcxv6YtDTLSAqP27LrdtYHXFnJZI+Tp3MWg68OpDPv\n" | 
 |   "UMUM2lkQBoouKQ6swjE9Nml+1sz1PW+z6xt27zuj+skrX2ZvqR5z8kkuOfdPt43/1fMm/grFG6f\n" | 
 |   "Lss9JA7JG7tnZs/SfJUrfS3foJ9TvHCopJsV8nWx/t24bJn8Fo/5TjWJXMJIS+i+G36TsZ/7Q9P\n" | 
 |   "8ATfzfeOFofVSZv2/zvt+O3X/v65dJPjt/BiyfN1/wn0zre79nVej/ADG8ep4x2/6Srjd6TdviF\n" | 
 |   "52ko8m6/Ht9X1KnftEo+POwxzK8mSTF46vrH6T1/OEl5Okkl//Z/+0uHFBob3Rvc2hvcCAzLjAA\n" | 
 |   "OEJJTQQEAAAAAAArHAIAAAIAAhwCeAAfICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIAA\n" | 
 |   "4QklNBCUAAAAAABD7Caa9B0wqNp2P4sxXqayFOEJJTQPqAAAAAB2wPD94bWwgdmVyc2lvbj0iMS\n" | 
 |   "4wIiBlbmNvZGluZz0iVVRGLTgiPz4KPCFET0NUWVBFIHBsaXN0IFBVQkxJQyAiLS8vQXBwbGUgQ\n" | 
 |   "29tcHV0ZXIvL0RURCBQTElTVCAxLjAvL0VOIiAiaHR0cDovL3d3dy5hcHBsZS5jb20vRFREcy9Q\n" | 
 |   "cm9wZXJ0eUxpc3QtMS4wLmR0ZCI+CjxwbGlzdCB2ZXJzaW9uPSIxLjAiPgo8ZGljdD4KCTxrZXk\n" | 
 |   "+Y29tLmFwcGxlLnByaW50LlBhZ2VGb3JtYXQuUE1Ib3Jpem9udGFsUmVzPC9rZXk+Cgk8ZGljdD\n" | 
 |   "4KCQk8a2V5PmNvbS5hcHBsZS5wcmludC50aWNrZXQuY3JlYXRvcjwva2V5PgoJCTxzdHJpbmc+Y\n" | 
 |   "29tLmFwcGxlLnByaW50aW5nbWFuYWdlcjwvc3RyaW5nPgoJCTxrZXk+Y29tLmFwcGxlLnByaW50\n" | 
 |   "LnRpY2tldC5pdGVtQXJyYXk8L2tleT4KCQk8YXJyYXk+CgkJCTxkaWN0PgoJCQkJPGtleT5jb20\n" | 
 |   "uYXBwbGUucHJpbnQuUGFnZUZvcm1hdC5QTUhvcml6b250YWxSZXM8L2tleT4KCQkJCTxyZWFsPj\n" | 
 |   "cyPC9yZWFsPgoJCQkJPGtleT5jb20uYXBwbGUucHJpbnQudGlja2V0LmNsaWVudDwva2V5PgoJC\n" | 
 |   "QkJPHN0cmluZz5jb20uYXBwbGUucHJpbnRpbmdtYW5hZ2VyPC9zdHJpbmc+CgkJCQk8a2V5PmNv\n" | 
 |   "bS5hcHBsZS5wcmludC50aWNrZXQubW9kRGF0ZTwva2V5PgoJCQkJPGRhdGU+MjAwNy0wMS0zMFQ\n" | 
 |   "yMjowODo0MVo8L2RhdGU+CgkJCQk8a2V5PmNvbS5hcHBsZS5wcmludC50aWNrZXQuc3RhdGVGbG\n" | 
 |   "FnPC9rZXk+CgkJCQk8aW50ZWdlcj4wPC9pbnRlZ2VyPgoJCQk8L2RpY3Q+CgkJPC9hcnJheT4KC\n" | 
 |   "TwvZGljdD4KCTxrZXk+Y29tLmFwcGxlLnByaW50LlBhZ2VGb3JtYXQuUE1PcmllbnRhdGlvbjwv\n" | 
 |   "a2V5PgoJPGRpY3Q+CgkJPGtleT5jb20uYXBwbGUucHJpbnQudGlja2V0LmNyZWF0b3I8L2tleT4\n" | 
 |   "KCQk8c3RyaW5nPmNvbS5hcHBsZS5wcmludGluZ21hbmFnZXI8L3N0cmluZz4KCQk8a2V5PmNvbS\n" | 
 |   "5hcHBsZS5wcmludC50aWNrZXQuaXRlbUFycmF5PC9rZXk+CgkJPGFycmF5PgoJCQk8ZGljdD4KC\n" | 
 |   "QkJCTxrZXk+Y29tLmFwcGxlLnByaW50LlBhZ2VGb3JtYXQuUE1PcmllbnRhdGlvbjwva2V5PgoJ\n" | 
 |   "CQkJPGludGVnZXI+MTwvaW50ZWdlcj4KCQkJCTxrZXk+Y29tLmFwcGxlLnByaW50LnRpY2tldC5\n" | 
 |   "jbGllbnQ8L2tleT4KCQkJCTxzdHJpbmc+Y29tLmFwcGxlLnByaW50aW5nbWFuYWdlcjwvc3RyaW\n" | 
 |   "5nPgoJCQkJPGtleT5jb20uYXBwbGUucHJpbnQudGlja2V0Lm1vZERhdGU8L2tleT4KCQkJCTxkY\n" | 
 |   "XRlPjIwMDctMDEtMzBUMjI6MDg6NDFaPC9kYXRlPgoJCQkJPGtleT5jb20uYXBwbGUucHJpbnQu\n" | 
 |   "dGlja2V0LnN0YXRlRmxhZzwva2V5PgoJCQkJPGludGVnZXI+MDwvaW50ZWdlcj4KCQkJPC9kaWN\n" | 
 |   "0PgoJCTwvYXJyYXk+Cgk8L2RpY3Q+Cgk8a2V5PmNvbS5hcHBsZS5wcmludC5QYWdlRm9ybWF0Ll\n" | 
 |   "BNU2NhbGluZzwva2V5PgoJPGRpY3Q+CgkJPGtleT5jb20uYXBwbGUucHJpbnQudGlja2V0LmNyZ\n" | 
 |   "WF0b3I8L2tleT4KCQk8c3RyaW5nPmNvbS5hcHBsZS5wcmludGluZ21hbmFnZXI8L3N0cmluZz4K\n" | 
 |   "CQk8a2V5PmNvbS5hcHBsZS5wcmludC50aWNrZXQuaXRlbUFycmF5PC9rZXk+CgkJPGFycmF5Pgo\n" | 
 |   "JCQk8ZGljdD4KCQkJCTxrZXk+Y29tLmFwcGxlLnByaW50LlBhZ2VGb3JtYXQuUE1TY2FsaW5nPC\n" | 
 |   "9rZXk+CgkJCQk8cmVhbD4xPC9yZWFsPgoJCQkJPGtleT5jb20uYXBwbGUucHJpbnQudGlja2V0L\n" | 
 |   "mNsaWVudDwva2V5PgoJCQkJPHN0cmluZz5jb20uYXBwbGUucHJpbnRpbmdtYW5hZ2VyPC9zdHJp\n" | 
 |   "bmc+CgkJCQk8a2V5PmNvbS5hcHBsZS5wcmludC50aWNrZXQubW9kRGF0ZTwva2V5PgoJCQkJPGR\n" | 
 |   "hdGU+MjAwNy0wMS0zMFQyMjowODo0MVo8L2RhdGU+CgkJCQk8a2V5PmNvbS5hcHBsZS5wcmludC\n" | 
 |   "50aWNrZXQuc3RhdGVGbGFnPC9rZXk+CgkJCQk8aW50ZWdlcj4wPC9pbnRlZ2VyPgoJCQk8L2RpY\n" | 
 |   "3Q+CgkJPC9hcnJheT4KCTwvZGljdD4KCTxrZXk+Y29tLmFwcGxlLnByaW50LlBhZ2VGb3JtYXQu\n" | 
 |   "UE1WZXJ0aWNhbFJlczwva2V5PgoJPGRpY3Q+CgkJPGtleT5jb20uYXBwbGUucHJpbnQudGlja2V\n" | 
 |   "0LmNyZWF0b3I8L2tleT4KCQk8c3RyaW5nPmNvbS5hcHBsZS5wcmludGluZ21hbmFnZXI8L3N0cm\n" | 
 |   "luZz4KCQk8a2V5PmNvbS5hcHBsZS5wcmludC50aWNrZXQuaXRlbUFycmF5PC9rZXk+CgkJPGFyc\n" | 
 |   "mF5PgoJCQk8ZGljdD4KCQkJCTxrZXk+Y29tLmFwcGxlLnByaW50LlBhZ2VGb3JtYXQuUE1WZXJ0\n" | 
 |   "aWNhbFJlczwva2V5PgoJCQkJPHJlYWw+NzI8L3JlYWw+CgkJCQk8a2V5PmNvbS5hcHBsZS5wcml\n" | 
 |   "udC50aWNrZXQuY2xpZW50PC9rZXk+CgkJCQk8c3RyaW5nPmNvbS5hcHBsZS5wcmludGluZ21hbm\n" | 
 |   "FnZXI8L3N0cmluZz4KCQkJCTxrZXk+Y29tLmFwcGxlLnByaW50LnRpY2tldC5tb2REYXRlPC9rZ\n" | 
 |   "Xk+CgkJCQk8ZGF0ZT4yMDA3LTAxLTMwVDIyOjA4OjQxWjwvZGF0ZT4KCQkJCTxrZXk+Y29tLmFw\n" | 
 |   "cGxlLnByaW50LnRpY2tldC5zdGF0ZUZsYWc8L2tleT4KCQkJCTxpbnRlZ2VyPjA8L2ludGVnZXI\n" | 
 |   "+CgkJCTwvZGljdD4KCQk8L2FycmF5PgoJPC9kaWN0PgoJPGtleT5jb20uYXBwbGUucHJpbnQuUG\n" | 
 |   "FnZUZvcm1hdC5QTVZlcnRpY2FsU2NhbGluZzwva2V5PgoJPGRpY3Q+CgkJPGtleT5jb20uYXBwb\n" | 
 |   "GUucHJpbnQudGlja2V0LmNyZWF0b3I8L2tleT4KCQk8c3RyaW5nPmNvbS5hcHBsZS5wcmludGlu\n" | 
 |   "Z21hbmFnZXI8L3N0cmluZz4KCQk8a2V5PmNvbS5hcHBsZS5wcmludC50aWNrZXQuaXRlbUFycmF\n" | 
 |   "5PC9rZXk+CgkJPGFycmF5PgoJCQk8ZGljdD4KCQkJCTxrZXk+Y29tLmFwcGxlLnByaW50LlBhZ2\n" | 
 |   "VGb3JtYXQuUE1WZXJ0aWNhbFNjYWxpbmc8L2tleT4KCQkJCTxyZWFsPjE8L3JlYWw+CgkJCQk8a\n" | 
 |   "2V5PmNvbS5hcHBsZS5wcmludC50aWNrZXQuY2xpZW50PC9rZXk+CgkJCQk8c3RyaW5nPmNvbS5h\n" | 
 |   "cHBsZS5wcmludGluZ21hbmFnZXI8L3N0cmluZz4KCQkJCTxrZXk+Y29tLmFwcGxlLnByaW50LnR\n" | 
 |   "pY2tldC5tb2REYXRlPC9rZXk+CgkJCQk8ZGF0ZT4yMDA3LTAxLTMwVDIyOjA4OjQxWjwvZGF0ZT\n" | 
 |   "4KCQkJCTxrZXk+Y29tLmFwcGxlLnByaW50LnRpY2tldC5zdGF0ZUZsYWc8L2tleT4KCQkJCTxpb\n" | 
 |   "nRlZ2VyPjA8L2ludGVnZXI+CgkJCTwvZGljdD4KCQk8L2FycmF5PgoJPC9kaWN0PgoJPGtleT5j\n" | 
 |   "b20uYXBwbGUucHJpbnQuc3ViVGlja2V0LnBhcGVyX2luZm9fdGlja2V0PC9rZXk+Cgk8ZGljdD4\n" | 
 |   "KCQk8a2V5PmNvbS5hcHBsZS5wcmludC5QYWdlRm9ybWF0LlBNQWRqdXN0ZWRQYWdlUmVjdDwva2\n" | 
 |   "V5PgoJCTxkaWN0PgoJCQk8a2V5PmNvbS5hcHBsZS5wcmludC50aWNrZXQuY3JlYXRvcjwva2V5P\n" | 
 |   "goJCQk8c3RyaW5nPmNvbS5hcHBsZS5wcmludGluZ21hbmFnZXI8L3N0cmluZz4KCQkJPGtleT5j\n" | 
 |   "b20uYXBwbGUucHJpbnQudGlja2V0Lml0ZW1BcnJheTwva2V5PgoJCQk8YXJyYXk+CgkJCQk8ZGl\n" | 
 |   "jdD4KCQkJCQk8a2V5PmNvbS5hcHBsZS5wcmludC5QYWdlRm9ybWF0LlBNQWRqdXN0ZWRQYWdlUm\n" | 
 |   "VjdDwva2V5PgoJCQkJCTxhcnJheT4KCQkJCQkJPHJlYWw+MC4wPC9yZWFsPgoJCQkJCQk8cmVhb\n" | 
 |   "D4wLjA8L3JlYWw+CgkJCQkJCTxyZWFsPjczNDwvcmVhbD4KCQkJCQkJPHJlYWw+NTc2PC9yZWFs\n" | 
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 |   "ZDZqwb0eXw7dMgIi7bjllVXsz7yNcfWC0Vd3Ip92Y2UOz0cnsPlwyx8xQ/u24sMxCadoJp9LOXk\n" | 
 |   "VX/uwRUE0BI8cokbLMyoKouHu2MaKGXw7fLDwgoGSkbHpaNZyLLHRSKcFFQQRvUdMlwUFOQyLzr\n" | 
 |   "ztpCaba6fPau4ijv4OURY8AjVFKV7ZZiO+7Vnh6XvXkSWNbW2WTb92KDxIFMzwHlZc3zX+fuizW\n" | 
 |   "f5p3ty8XGDU4YLmCQiisyII3+4rvl8UB5ffEghRGvOm7AbnvWvjk1fen/ONPldPKP5aWOpPCfr2\n" | 
 |   "uE31y6q2wbaMEn+VAMDSdyzrzj+avlHyTp0l/r2rxWFuHWJuIeacu4qFCRgsajfBwsty89/6Gr/\n" | 
 |   "ACa9an+JL/hSnrfoubhXwpXpjwhaL//Q8E1AqtcAZMs8l6i1nqMa1oSVP0VynKLDmaWdSfQXl69\n" | 
 |   "jF1Jv8MhDb5rpB3AO7INRRLhhGp4R05FgaGvTMU8200xS70zVDMRp2pTIOvBmB3PgQP15kxIcnD\n" | 
 |   "LH/EEz0rRvOJhldr9pQtCqyd6VrShGTqw5d4ARv9jHfOGl+ZJNMluLkyenaFbiRdqFYW5nrWuwO\n" | 
 |   "MKB5MdSMRxnhlu9N8p6lLFpti63FUjCtFJTrDKvse2bEDZ4XJ9RZB+YPli2/Mjy5bxoUi1a0YS2\n" | 
 |   "85UOwIXiy9jRu+TBppfOF1+V3m22vrdpNPM8cs/oo0VJlUqQPjValR3+IZNNvtLS9Yu9Mi0/TJr\n" | 
 |   "kyp6QhWVVCIWRATsKBemwwFrDzT87fybs/wA1bW21PRb+DTvNlgGSRp6iC8i3KJJx+y6n7D0Pwm\n" | 
 |   "hxBZXT55/6Fi/Nf0PW+qWXq+t6X1X67F6vD/ftK04V/wBl344U8b//0fBapxheVh9ocV+nviqY2\n" | 
 |   "/qQJDew/bioWHiuQ8m0bbvaPKGtQ6jaxSo9JloCK75gZI0Xb4sgkHo8MouoAvP94BsRmGY7uWJU\n" | 
 |   "gzbypOQpNOvIdK4Nw2WCE2tXulTkjEEbdafgclxMhFBas93dwyQzsWDghlJFONKHJCZtjOFBJfy\n" | 
 |   "j1y9vPL9zpbIs0WkXL2sUjA8hDXlGCRXtt07ZuYvL5KJeo6bfajbkzWkcToR8dqshZ6in2fhNK/\n" | 
 |   "PDTUlXmHVvMdr5o0v9H2kdrqGpfu7m0nkY87Uf7tkKAU4/s03ynLkEBbfihx7dGT6va67LbRMNR\n" | 
 |   "aKOBuUTKgIBXoK1BOYR1M3aQ0mOt9yxUeZNdtJhFapLqMluSXkg5oxJrUMW5KevQ9MmNXXNqOiH\n" | 
 |   "Rr/Hmv8A1r9I/oj95w+r+j9Yf1+NP5+nXtTD+dF8tkfkOlv/0vC3ph7f0/alcVTbS4A8QibuKb5\n" | 
 |   "RI05EBYRFpdX3ly79a2qYCavH/EY7TCYyMD5PSdD8+wXUSn1ArDqOhBzFlipz4ZwWbaV5htbsgF\n" | 
 |   "qg9crMXKErGyYwajFGzxyHlGSePbbwyqg5UZlCaxrFpaWU95LIqrEjMAT4Dp9OShGy1ZslBhv/A\n" | 
 |   "Dj9rd/a+aL+xUK+m38L3d0HrxRo2HFtu5D8c27y8t30raarbWkU+u6g4gsNORn+EcUaSh2Pc0/4\n" | 
 |   "lgtAjezzbT9SutY1i782al8Nxdyotqh6xWybIg+jc5q8s+I27bFDgFPQp9RE+nrag70+L6crrZu\n" | 
 |   "4jajokdv6LW/Dii1Wo61PXKQN3KPK0L+h4/rnD/K5V78a5LhXxd3/0/DMXXtwxVNtL9Xkaf3f7N\n" | 
 |   "etfbKMjdjtkZ9D6ufrlK0+HpX8coF9HJ26sXvfqXrf7i/U+uften/d/wCyrmQL6uOav0pvpP8Ai\n" | 
 |   "b1F+rV59+vH6a5XLhcjH4nRmY/xpxHP0/UptWvT6Mx/RbmjxWK+aP8AFf1M/pCv1Kvxen9inavf\n" | 
 |   "MrFwXtzcLUeLXq5Mv/I3nz1b0v8AjofuKVry9KrUpTanOlf9jmQ68va/zH9b/COn/o7/AI431mP\n" | 
 |   "65SvLh+zWvbl9rMfNfC34K4kmj9T6lD6FKclp/DNYXZx5srsPrHor6nXvkgxTPS/U+rv6dPU5mt\n" | 
 |   "fngFN5ulv+l/pL/Lp/scerHo//2Q==\n"; | 
 |  | 
 | static std::string gCommandLine; | 
 |  | 
 | TEST(Base64, LargeSample) { | 
 |   LOG(LS_VERBOSE) << "Testing specific base64 file"; | 
 |  | 
 |   char unescaped[64 * 1024]; | 
 |  | 
 |   // unescape that massive blob above | 
 |   size_t size = Base64Unescape(SpecificTest, | 
 |                             sizeof(SpecificTest), | 
 |                             unescaped, | 
 |                             sizeof(unescaped)); | 
 |  | 
 |   EXPECT_EQ(size, sizeof(testbase64)); | 
 |   EXPECT_EQ(0, memcmp(testbase64, unescaped, sizeof(testbase64))); | 
 | } | 
 |  | 
 | bool DecodeTest(const char* encoded, size_t expect_unparsed, | 
 |                 const char* decoded, Base64::DecodeFlags flags) | 
 | { | 
 |   std::string result; | 
 |   size_t consumed = 0, encoded_len = strlen(encoded); | 
 |   bool success = Base64::DecodeFromArray(encoded, encoded_len, flags, | 
 |                                          &result, &consumed); | 
 |   size_t unparsed = encoded_len - consumed; | 
 |   EXPECT_EQ(expect_unparsed, unparsed) << "\"" << encoded | 
 |                                        << "\" -> \"" << decoded | 
 |                                        << "\""; | 
 |   EXPECT_STREQ(decoded, result.c_str()); | 
 |   return success; | 
 | } | 
 |  | 
 | #define Flags(x,y,z) \ | 
 |   Base64::DO_PARSE_##x | Base64::DO_PAD_##y | Base64::DO_TERM_##z | 
 |  | 
 | TEST(Base64, DecodeParseOptions) { | 
 |   // Trailing whitespace | 
 |   EXPECT_TRUE (DecodeTest("YWJjZA== ", 1, "abcd", Flags(STRICT, YES, CHAR))); | 
 |   EXPECT_TRUE (DecodeTest("YWJjZA== ", 0, "abcd", Flags(WHITE,  YES, CHAR))); | 
 |   EXPECT_TRUE (DecodeTest("YWJjZA== ", 0, "abcd", Flags(ANY,    YES, CHAR))); | 
 |  | 
 |   // Embedded whitespace | 
 |   EXPECT_FALSE(DecodeTest("YWJjZA= =", 3, "abcd", Flags(STRICT, YES, CHAR))); | 
 |   EXPECT_TRUE (DecodeTest("YWJjZA= =", 0, "abcd", Flags(WHITE,  YES, CHAR))); | 
 |   EXPECT_TRUE (DecodeTest("YWJjZA= =", 0, "abcd", Flags(ANY,    YES, CHAR))); | 
 |  | 
 |   // Embedded non-base64 characters | 
 |   EXPECT_FALSE(DecodeTest("YWJjZA=*=", 3, "abcd", Flags(STRICT, YES, CHAR))); | 
 |   EXPECT_FALSE(DecodeTest("YWJjZA=*=", 3, "abcd", Flags(WHITE,  YES, CHAR))); | 
 |   EXPECT_TRUE (DecodeTest("YWJjZA=*=", 0, "abcd", Flags(ANY,    YES, CHAR))); | 
 |  | 
 |   // Unexpected padding characters | 
 |   EXPECT_FALSE(DecodeTest("YW=JjZA==", 7, "a",    Flags(STRICT, YES, CHAR))); | 
 |   EXPECT_FALSE(DecodeTest("YW=JjZA==", 7, "a",    Flags(WHITE,  YES, CHAR))); | 
 |   EXPECT_TRUE (DecodeTest("YW=JjZA==", 0, "abcd", Flags(ANY,    YES, CHAR))); | 
 | } | 
 |  | 
 | TEST(Base64, DecodePadOptions) { | 
 |   // Padding | 
 |   EXPECT_TRUE (DecodeTest("YWJjZA==",  0, "abcd", Flags(STRICT, YES, CHAR))); | 
 |   EXPECT_TRUE (DecodeTest("YWJjZA==",  0, "abcd", Flags(STRICT, ANY, CHAR))); | 
 |   EXPECT_TRUE (DecodeTest("YWJjZA==",  2, "abcd", Flags(STRICT, NO,  CHAR))); | 
 |  | 
 |   // Incomplete padding | 
 |   EXPECT_FALSE(DecodeTest("YWJjZA=",   1, "abcd", Flags(STRICT, YES, CHAR))); | 
 |   EXPECT_TRUE (DecodeTest("YWJjZA=",   1, "abcd", Flags(STRICT, ANY, CHAR))); | 
 |   EXPECT_TRUE (DecodeTest("YWJjZA=",   1, "abcd", Flags(STRICT, NO,  CHAR))); | 
 |  | 
 |   // No padding | 
 |   EXPECT_FALSE(DecodeTest("YWJjZA",    0, "abcd", Flags(STRICT, YES, CHAR))); | 
 |   EXPECT_TRUE (DecodeTest("YWJjZA",    0, "abcd", Flags(STRICT, ANY, CHAR))); | 
 |   EXPECT_TRUE (DecodeTest("YWJjZA",    0, "abcd", Flags(STRICT, NO,  CHAR))); | 
 | } | 
 |  | 
 | TEST(Base64, DecodeTerminateOptions) { | 
 |   // Complete quantum | 
 |   EXPECT_TRUE (DecodeTest("YWJj",      0, "abc",  Flags(STRICT, NO,  BUFFER))); | 
 |   EXPECT_TRUE (DecodeTest("YWJj",      0, "abc",  Flags(STRICT, NO,  CHAR))); | 
 |   EXPECT_TRUE (DecodeTest("YWJj",      0, "abc",  Flags(STRICT, NO,  ANY))); | 
 |  | 
 |   // Complete quantum with trailing data | 
 |   EXPECT_FALSE(DecodeTest("YWJj*",     1, "abc",  Flags(STRICT, NO,  BUFFER))); | 
 |   EXPECT_TRUE (DecodeTest("YWJj*",     1, "abc",  Flags(STRICT, NO,  CHAR))); | 
 |   EXPECT_TRUE (DecodeTest("YWJj*",     1, "abc",  Flags(STRICT, NO,  ANY))); | 
 |  | 
 |   // Incomplete quantum | 
 |   EXPECT_FALSE(DecodeTest("YWJ",       0, "ab",   Flags(STRICT, NO,  BUFFER))); | 
 |   EXPECT_FALSE(DecodeTest("YWJ",       0, "ab",   Flags(STRICT, NO,  CHAR))); | 
 |   EXPECT_TRUE (DecodeTest("YWJ",       0, "ab",   Flags(STRICT, NO,  ANY))); | 
 | } | 
 |  | 
 | TEST(Base64, GetNextBase64Char) { | 
 |   // The table looks like this: | 
 |   // "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/" | 
 |   char next_char; | 
 |   EXPECT_TRUE(Base64::GetNextBase64Char('A', &next_char)); | 
 |   EXPECT_EQ('B', next_char); | 
 |   EXPECT_TRUE(Base64::GetNextBase64Char('Z', &next_char)); | 
 |   EXPECT_EQ('a', next_char); | 
 |   EXPECT_TRUE(Base64::GetNextBase64Char('/', &next_char)); | 
 |   EXPECT_EQ('A', next_char); | 
 |   EXPECT_FALSE(Base64::GetNextBase64Char('&', &next_char)); | 
 |   EXPECT_FALSE(Base64::GetNextBase64Char('Z', NULL)); | 
 | } |