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      1 /*
      2  * libjingle
      3  * Copyright 2011, Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "talk/base/common.h"
     29 #include "talk/base/base64.h"
     30 #include "talk/base/gunit.h"
     31 #include "talk/base/logging.h"
     32 #include "talk/base/stringutils.h"
     33 #include "talk/base/stream.h"
     34 
     35 #include "talk/base/testbase64.h"
     36 
     37 using namespace std;
     38 using namespace talk_base;
     39 
     40 static struct {
     41   size_t plain_length;
     42   const char* plaintext;
     43   const char* cyphertext;
     44 } base64_tests[] = {
     45 
     46   // Basic bit patterns;
     47   // values obtained with "echo -n '...' | uuencode -m test"
     48 
     49   { 1, "\000", "AA==" },
     50   { 1, "\001", "AQ==" },
     51   { 1, "\002", "Ag==" },
     52   { 1, "\004", "BA==" },
     53   { 1, "\010", "CA==" },
     54   { 1, "\020", "EA==" },
     55   { 1, "\040", "IA==" },
     56   { 1, "\100", "QA==" },
     57   { 1, "\200", "gA==" },
     58 
     59   { 1, "\377", "/w==" },
     60   { 1, "\376", "/g==" },
     61   { 1, "\375", "/Q==" },
     62   { 1, "\373", "+w==" },
     63   { 1, "\367", "9w==" },
     64   { 1, "\357", "7w==" },
     65   { 1, "\337", "3w==" },
     66   { 1, "\277", "vw==" },
     67   { 1, "\177", "fw==" },
     68   { 2, "\000\000", "AAA=" },
     69   { 2, "\000\001", "AAE=" },
     70   { 2, "\000\002", "AAI=" },
     71   { 2, "\000\004", "AAQ=" },
     72   { 2, "\000\010", "AAg=" },
     73   { 2, "\000\020", "ABA=" },
     74   { 2, "\000\040", "ACA=" },
     75   { 2, "\000\100", "AEA=" },
     76   { 2, "\000\200", "AIA=" },
     77   { 2, "\001\000", "AQA=" },
     78   { 2, "\002\000", "AgA=" },
     79   { 2, "\004\000", "BAA=" },
     80   { 2, "\010\000", "CAA=" },
     81   { 2, "\020\000", "EAA=" },
     82   { 2, "\040\000", "IAA=" },
     83   { 2, "\100\000", "QAA=" },
     84   { 2, "\200\000", "gAA=" },
     85 
     86   { 2, "\377\377", "//8=" },
     87   { 2, "\377\376", "//4=" },
     88   { 2, "\377\375", "//0=" },
     89   { 2, "\377\373", "//s=" },
     90   { 2, "\377\367", "//c=" },
     91   { 2, "\377\357", "/+8=" },
     92   { 2, "\377\337", "/98=" },
     93   { 2, "\377\277", "/78=" },
     94   { 2, "\377\177", "/38=" },
     95   { 2, "\376\377", "/v8=" },
     96   { 2, "\375\377", "/f8=" },
     97   { 2, "\373\377", "+/8=" },
     98   { 2, "\367\377", "9/8=" },
     99   { 2, "\357\377", "7/8=" },
    100   { 2, "\337\377", "3/8=" },
    101   { 2, "\277\377", "v/8=" },
    102   { 2, "\177\377", "f/8=" },
    103 
    104   { 3, "\000\000\000", "AAAA" },
    105   { 3, "\000\000\001", "AAAB" },
    106   { 3, "\000\000\002", "AAAC" },
    107   { 3, "\000\000\004", "AAAE" },
    108   { 3, "\000\000\010", "AAAI" },
    109   { 3, "\000\000\020", "AAAQ" },
    110   { 3, "\000\000\040", "AAAg" },
    111   { 3, "\000\000\100", "AABA" },
    112   { 3, "\000\000\200", "AACA" },
    113   { 3, "\000\001\000", "AAEA" },
    114   { 3, "\000\002\000", "AAIA" },
    115   { 3, "\000\004\000", "AAQA" },
    116   { 3, "\000\010\000", "AAgA" },
    117   { 3, "\000\020\000", "ABAA" },
    118   { 3, "\000\040\000", "ACAA" },
    119   { 3, "\000\100\000", "AEAA" },
    120   { 3, "\000\200\000", "AIAA" },
    121   { 3, "\001\000\000", "AQAA" },
    122   { 3, "\002\000\000", "AgAA" },
    123   { 3, "\004\000\000", "BAAA" },
    124   { 3, "\010\000\000", "CAAA" },
    125   { 3, "\020\000\000", "EAAA" },
    126   { 3, "\040\000\000", "IAAA" },
    127   { 3, "\100\000\000", "QAAA" },
    128   { 3, "\200\000\000", "gAAA" },
    129 
    130   { 3, "\377\377\377", "////" },
    131   { 3, "\377\377\376", "///+" },
    132   { 3, "\377\377\375", "///9" },
    133   { 3, "\377\377\373", "///7" },
    134   { 3, "\377\377\367", "///3" },
    135   { 3, "\377\377\357", "///v" },
    136   { 3, "\377\377\337", "///f" },
    137   { 3, "\377\377\277", "//+/" },
    138   { 3, "\377\377\177", "//9/" },
    139   { 3, "\377\376\377", "//7/" },
    140   { 3, "\377\375\377", "//3/" },
    141   { 3, "\377\373\377", "//v/" },
    142   { 3, "\377\367\377", "//f/" },
    143   { 3, "\377\357\377", "/+//" },
    144   { 3, "\377\337\377", "/9//" },
    145   { 3, "\377\277\377", "/7//" },
    146   { 3, "\377\177\377", "/3//" },
    147   { 3, "\376\377\377", "/v//" },
    148   { 3, "\375\377\377", "/f//" },
    149   { 3, "\373\377\377", "+///" },
    150   { 3, "\367\377\377", "9///" },
    151   { 3, "\357\377\377", "7///" },
    152   { 3, "\337\377\377", "3///" },
    153   { 3, "\277\377\377", "v///" },
    154   { 3, "\177\377\377", "f///" },
    155 
    156   // Random numbers: values obtained with
    157   //
    158   //  #! /bin/bash
    159   //  dd bs=$1 count=1 if=/dev/random of=/tmp/bar.random
    160   //  od -N $1 -t o1 /tmp/bar.random
    161   //  uuencode -m test < /tmp/bar.random
    162   //
    163   // where $1 is the number of bytes (2, 3)
    164 
    165   { 2, "\243\361", "o/E=" },
    166   { 2, "\024\167", "FHc=" },
    167   { 2, "\313\252", "y6o=" },
    168   { 2, "\046\041", "JiE=" },
    169   { 2, "\145\236", "ZZ4=" },
    170   { 2, "\254\325", "rNU=" },
    171   { 2, "\061\330", "Mdg=" },
    172   { 2, "\245\032", "pRo=" },
    173   { 2, "\006\000", "BgA=" },
    174   { 2, "\375\131", "/Vk=" },
    175   { 2, "\303\210", "w4g=" },
    176   { 2, "\040\037", "IB8=" },
    177   { 2, "\261\372", "sfo=" },
    178   { 2, "\335\014", "3Qw=" },
    179   { 2, "\233\217", "m48=" },
    180   { 2, "\373\056", "+y4=" },
    181   { 2, "\247\232", "p5o=" },
    182   { 2, "\107\053", "Rys=" },
    183   { 2, "\204\077", "hD8=" },
    184   { 2, "\276\211", "vok=" },
    185   { 2, "\313\110", "y0g=" },
    186   { 2, "\363\376", "8/4=" },
    187   { 2, "\251\234", "qZw=" },
    188   { 2, "\103\262", "Q7I=" },
    189   { 2, "\142\312", "Yso=" },
    190   { 2, "\067\211", "N4k=" },
    191   { 2, "\220\001", "kAE=" },
    192   { 2, "\152\240", "aqA=" },
    193   { 2, "\367\061", "9zE=" },
    194   { 2, "\133\255", "W60=" },
    195   { 2, "\176\035", "fh0=" },
    196   { 2, "\032\231", "Gpk=" },
    197 
    198   { 3, "\013\007\144", "Cwdk" },
    199   { 3, "\030\112\106", "GEpG" },
    200   { 3, "\047\325\046", "J9Um" },
    201   { 3, "\310\160\022", "yHAS" },
    202   { 3, "\131\100\237", "WUCf" },
    203   { 3, "\064\342\134", "NOJc" },
    204   { 3, "\010\177\004", "CH8E" },
    205   { 3, "\345\147\205", "5WeF" },
    206   { 3, "\300\343\360", "wOPw" },
    207   { 3, "\061\240\201", "MaCB" },
    208   { 3, "\225\333\044", "ldsk" },
    209   { 3, "\215\137\352", "jV/q" },
    210   { 3, "\371\147\160", "+Wdw" },
    211   { 3, "\030\320\051", "GNAp" },
    212   { 3, "\044\174\241", "JHyh" },
    213   { 3, "\260\127\037", "sFcf" },
    214   { 3, "\111\045\033", "SSUb" },
    215   { 3, "\202\114\107", "gkxH" },
    216   { 3, "\057\371\042", "L/ki" },
    217   { 3, "\223\247\244", "k6ek" },
    218   { 3, "\047\216\144", "J45k" },
    219   { 3, "\203\070\327", "gzjX" },
    220   { 3, "\247\140\072", "p2A6" },
    221   { 3, "\124\115\116", "VE1O" },
    222   { 3, "\157\162\050", "b3Io" },
    223   { 3, "\357\223\004", "75ME" },
    224   { 3, "\052\117\156", "Kk9u" },
    225   { 3, "\347\154\000", "52wA" },
    226   { 3, "\303\012\142", "wwpi" },
    227   { 3, "\060\035\362", "MB3y" },
    228   { 3, "\130\226\361", "WJbx" },
    229   { 3, "\173\013\071", "ews5" },
    230   { 3, "\336\004\027", "3gQX" },
    231   { 3, "\357\366\234", "7/ac" },
    232   { 3, "\353\304\111", "68RJ" },
    233   { 3, "\024\264\131", "FLRZ" },
    234   { 3, "\075\114\251", "PUyp" },
    235   { 3, "\315\031\225", "zRmV" },
    236   { 3, "\154\201\276", "bIG+" },
    237   { 3, "\200\066\072", "gDY6" },
    238   { 3, "\142\350\267", "Yui3" },
    239   { 3, "\033\000\166", "GwB2" },
    240   { 3, "\210\055\077", "iC0/" },
    241   { 3, "\341\037\124", "4R9U" },
    242   { 3, "\161\103\152", "cUNq" },
    243   { 3, "\270\142\131", "uGJZ" },
    244   { 3, "\337\076\074", "3z48" },
    245   { 3, "\375\106\362", "/Uby" },
    246   { 3, "\227\301\127", "l8FX" },
    247   { 3, "\340\002\234", "4AKc" },
    248   { 3, "\121\064\033", "UTQb" },
    249   { 3, "\157\134\143", "b1xj" },
    250   { 3, "\247\055\327", "py3X" },
    251   { 3, "\340\142\005", "4GIF" },
    252   { 3, "\060\260\143", "MLBj" },
    253   { 3, "\075\203\170", "PYN4" },
    254   { 3, "\143\160\016", "Y3AO" },
    255   { 3, "\313\013\063", "ywsz" },
    256   { 3, "\174\236\135", "fJ5d" },
    257   { 3, "\103\047\026", "QycW" },
    258   { 3, "\365\005\343", "9QXj" },
    259   { 3, "\271\160\223", "uXCT" },
    260   { 3, "\362\255\172", "8q16" },
    261   { 3, "\113\012\015", "SwoN" },
    262 
    263   // various lengths, generated by this python script:
    264   //
    265   // from string import lowercase as lc
    266   // for i in range(27):
    267   //   print '{ %2d, "%s",%s "%s" },' % (i, lc[:i], ' ' * (26-i),
    268   //                                     lc[:i].encode('base64').strip())
    269 
    270   {  0, "abcdefghijklmnopqrstuvwxyz", "" },
    271   {  1, "abcdefghijklmnopqrstuvwxyz", "YQ==" },
    272   {  2, "abcdefghijklmnopqrstuvwxyz", "YWI=" },
    273   {  3, "abcdefghijklmnopqrstuvwxyz", "YWJj" },
    274   {  4, "abcdefghijklmnopqrstuvwxyz", "YWJjZA==" },
    275   {  5, "abcdefghijklmnopqrstuvwxyz", "YWJjZGU=" },
    276   {  6, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVm" },
    277   {  7, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZw==" },
    278   {  8, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2g=" },
    279   {  9, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hp" },
    280   { 10, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpag==" },
    281   { 11, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpams=" },
    282   { 12, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamts" },
    283   { 13, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbQ==" },
    284   { 14, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW4=" },
    285   { 15, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5v" },
    286   { 16, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5vcA==" },
    287   { 17, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5vcHE=" },
    288   { 18, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5vcHFy" },
    289   { 19, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5vcHFycw==" },
    290   { 20, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5vcHFyc3Q=" },
    291   { 21, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5vcHFyc3R1" },
    292   { 22, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dg==" },
    293   { 23, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnc=" },
    294   { 24, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4" },
    295   { 25, "abcdefghijklmnopqrstuvwxy",  "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eQ==" },
    296   { 26, "abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXo=" },
    297 };
    298 #if 0
    299 static struct {
    300   const char* plaintext;
    301   const char* cyphertext;
    302 } base64_strings[] = {
    303 
    304   // The first few Google quotes
    305   // Cyphertext created with "uuencode - GNU sharutils 4.2.1"
    306   {
    307     "Everyone!  We're teetering on the brink of disaster."
    308     " - Sergey Brin, 6/24/99, regarding the company's state "
    309     "after the unleashing of Netscape/Google search",
    310 
    311     "RXZlcnlvbmUhICBXZSdyZSB0ZWV0ZXJpbmcgb24gdGhlIGJyaW5rIG9mIGRp"
    312     "c2FzdGVyLiAtIFNlcmdleSBCcmluLCA2LzI0Lzk5LCByZWdhcmRpbmcgdGhl"
    313     "IGNvbXBhbnkncyBzdGF0ZSBhZnRlciB0aGUgdW5sZWFzaGluZyBvZiBOZXRz"
    314     "Y2FwZS9Hb29nbGUgc2VhcmNo" },
    315 
    316   {
    317     "I'm not sure why we're still alive, but we seem to be."
    318     " - Larry Page, 6/24/99, while hiding in the kitchenette "
    319     "during the Netscape traffic overflow",
    320 
    321     "SSdtIG5vdCBzdXJlIHdoeSB3ZSdyZSBzdGlsbCBhbGl2ZSwgYnV0IHdlIHNl"
    322     "ZW0gdG8gYmUuIC0gTGFycnkgUGFnZSwgNi8yNC85OSwgd2hpbGUgaGlkaW5n"
    323     "IGluIHRoZSBraXRjaGVuZXR0ZSBkdXJpbmcgdGhlIE5ldHNjYXBlIHRyYWZm"
    324     "aWMgb3ZlcmZsb3c" },
    325 
    326   {
    327     "I think kids want porn."
    328     " - Sergey Brin, 6/99, on why Google shouldn't prioritize a "
    329     "filtered search for children and families",
    330 
    331     "SSB0aGluayBraWRzIHdhbnQgcG9ybi4gLSBTZXJnZXkgQnJpbiwgNi85OSwg"
    332     "b24gd2h5IEdvb2dsZSBzaG91bGRuJ3QgcHJpb3JpdGl6ZSBhIGZpbHRlcmVk"
    333     "IHNlYXJjaCBmb3IgY2hpbGRyZW4gYW5kIGZhbWlsaWVz" },
    334 };
    335 #endif
    336 // Compare bytes 0..len-1 of x and y.  If not equal, abort with verbose error
    337 // message showing position and numeric value that differed.
    338 // Handles embedded nulls just like any other byte.
    339 // Only added because string.compare() in gcc-3.3.3 seems to misbehave with
    340 // embedded nulls.
    341 // TODO: switch back to string.compare() if/when gcc is fixed
    342 #define EXPECT_EQ_ARRAY(len, x, y, msg)                      \
    343   for (size_t j = 0; j < len; ++j) {                           \
    344     if (x[j] != y[j]) {                                     \
    345         LOG(LS_ERROR) << "" # x << " != " # y                  \
    346                    << " byte " << j << " msg: " << msg;     \
    347       }                                                     \
    348     }
    349 
    350 size_t Base64Escape(const unsigned char *src, size_t szsrc, char *dest,
    351                     size_t szdest) {
    352   std::string escaped;
    353   Base64::EncodeFromArray((const char *)src, szsrc, &escaped);
    354   memcpy(dest, escaped.data(), min(escaped.size(), szdest));
    355   return escaped.size();
    356 }
    357 
    358 size_t Base64Unescape(const char *src, size_t szsrc, char *dest,
    359                       size_t szdest) {
    360   std::string unescaped;
    361   EXPECT_TRUE(Base64::DecodeFromArray(src, szsrc, Base64::DO_LAX, &unescaped,
    362                                       NULL));
    363   memcpy(dest, unescaped.data(), min(unescaped.size(), szdest));
    364   return unescaped.size();
    365 }
    366 
    367 size_t Base64Unescape(const char *src, size_t szsrc, string *s) {
    368   EXPECT_TRUE(Base64::DecodeFromArray(src, szsrc, Base64::DO_LAX, s, NULL));
    369   return s->size();
    370 }
    371 
    372 TEST(Base64, EncodeDecodeBattery) {
    373   LOG(LS_VERBOSE) << "Testing base-64";
    374 
    375   size_t i;
    376 
    377   // Check the short strings; this tests the math (and boundaries)
    378   for( i = 0; i < sizeof(base64_tests) / sizeof(base64_tests[0]); ++i ) {
    379     char encode_buffer[100];
    380     size_t encode_length;
    381     char decode_buffer[100];
    382     size_t decode_length;
    383     size_t cypher_length;
    384 
    385     LOG(LS_VERBOSE) << "B64: " << base64_tests[i].cyphertext;
    386 
    387     const unsigned char* unsigned_plaintext =
    388       reinterpret_cast<const unsigned char*>(base64_tests[i].plaintext);
    389 
    390     cypher_length = strlen(base64_tests[i].cyphertext);
    391 
    392     // The basic escape function:
    393     memset(encode_buffer, 0, sizeof(encode_buffer));
    394     encode_length = Base64Escape(unsigned_plaintext,
    395                                  base64_tests[i].plain_length,
    396                                  encode_buffer,
    397                                  sizeof(encode_buffer));
    398     //    Is it of the expected length?
    399     EXPECT_EQ(encode_length, cypher_length);
    400 
    401     //    Is it the expected encoded value?
    402     EXPECT_STREQ(encode_buffer, base64_tests[i].cyphertext);
    403 
    404     // If we encode it into a buffer of exactly the right length...
    405     memset(encode_buffer, 0, sizeof(encode_buffer));
    406     encode_length = Base64Escape(unsigned_plaintext,
    407                                  base64_tests[i].plain_length,
    408                                  encode_buffer,
    409                                  cypher_length);
    410     //    Is it still of the expected length?
    411     EXPECT_EQ(encode_length, cypher_length);
    412 
    413     //    And is the value still correct?  (i.e., not losing the last byte)
    414     EXPECT_STREQ(encode_buffer, base64_tests[i].cyphertext);
    415 
    416     // If we decode it back:
    417     memset(decode_buffer, 0, sizeof(decode_buffer));
    418     decode_length = Base64Unescape(encode_buffer,
    419                                    cypher_length,
    420                                    decode_buffer,
    421                                    sizeof(decode_buffer));
    422 
    423     //    Is it of the expected length?
    424     EXPECT_EQ(decode_length, base64_tests[i].plain_length);
    425 
    426     //    Is it the expected decoded value?
    427     EXPECT_EQ(0,  memcmp(decode_buffer, base64_tests[i].plaintext, decode_length));
    428 
    429     // Our decoder treats the padding '=' characters at the end as
    430     // optional.  If encode_buffer has any, run some additional
    431     // tests that fiddle with them.
    432     char* first_equals = strchr(encode_buffer, '=');
    433     if (first_equals) {
    434       // How many equals signs does the string start with?
    435       int equals = (*(first_equals+1) == '=') ? 2 : 1;
    436 
    437       // Try chopping off the equals sign(s) entirely.  The decoder
    438       // should still be okay with this.
    439       string decoded2("this junk should also be ignored");
    440       *first_equals = '\0';
    441       EXPECT_NE(0U, Base64Unescape(encode_buffer, first_equals-encode_buffer,
    442                            &decoded2));
    443       EXPECT_EQ(decoded2.size(), base64_tests[i].plain_length);
    444       EXPECT_EQ_ARRAY(decoded2.size(), decoded2.data(), base64_tests[i].plaintext, i);
    445 
    446       size_t len;
    447 
    448       // try putting some extra stuff after the equals signs, or in between them
    449       if (equals == 2) {
    450         sprintfn(first_equals, 6, " = = ");
    451         len = first_equals - encode_buffer + 5;
    452       } else {
    453         sprintfn(first_equals, 6, " = ");
    454         len = first_equals - encode_buffer + 3;
    455       }
    456       decoded2.assign("this junk should be ignored");
    457       EXPECT_NE(0U, Base64Unescape(encode_buffer, len, &decoded2));
    458       EXPECT_EQ(decoded2.size(), base64_tests[i].plain_length);
    459       EXPECT_EQ_ARRAY(decoded2.size(), decoded2, base64_tests[i].plaintext, i);
    460     }
    461   }
    462 }
    463 
    464 // here's a weird case: a giant base64 encoded stream which broke our base64
    465 // decoding.  Let's test it explicitly.
    466 const char SpecificTest[] =
    467   "/9j/4AAQSkZJRgABAgEASABIAAD/4Q0HRXhpZgAATU0AKgAAAAgADAEOAAIAAAAgAAAAngEPAAI\n"
    468   "AAAAFAAAAvgEQAAIAAAAJAAAAwwESAAMAAAABAAEAAAEaAAUAAAABAAAAzAEbAAUAAAABAAAA1A\n"
    469   "EoAAMAAAABAAIAAAExAAIAAAAUAAAA3AEyAAIAAAAUAAAA8AE8AAIAAAAQAAABBAITAAMAAAABA\n"
    470   "AIAAIdpAAQAAAABAAABFAAAAsQgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgAFNPTlkA\n"
    471   "RFNDLVAyMDAAAAAASAAAAAEAAABIAAAAAUFkb2JlIFBob3Rvc2hvcCA3LjAAMjAwNzowMTozMCA\n"
    472   "yMzoxMDowNABNYWMgT1MgWCAxMC40LjgAAByCmgAFAAAAAQAAAmqCnQAFAAAAAQAAAnKIIgADAA\n"
    473   "AAAQACAACIJwADAAAAAQBkAACQAAAHAAAABDAyMjCQAwACAAAAFAAAAnqQBAACAAAAFAAAAo6RA\n"
    474   "QAHAAAABAECAwCRAgAFAAAAAQAAAqKSBAAKAAAAAQAAAqqSBQAFAAAAAQAAArKSBwADAAAAAQAF\n"
    475   "AACSCAADAAAAAQAAAACSCQADAAAAAQAPAACSCgAFAAAAAQAAArqgAAAHAAAABDAxMDCgAQADAAA\n"
    476   "AAf//AACgAgAEAAAAAQAAAGSgAwAEAAAAAQAAAGSjAAAHAAAAAQMAAACjAQAHAAAAAQEAAACkAQ\n"
    477   "ADAAAAAQAAAACkAgADAAAAAQAAAACkAwADAAAAAQAAAACkBgADAAAAAQAAAACkCAADAAAAAQAAA\n"
    478   "ACkCQADAAAAAQAAAACkCgADAAAAAQAAAAAAAAAAAAAACgAAAZAAAAAcAAAACjIwMDc6MDE6MjAg\n"
    479   "MjM6MDU6NTIAMjAwNzowMToyMCAyMzowNTo1MgAAAAAIAAAAAQAAAAAAAAAKAAAAMAAAABAAAAB\n"
    480   "PAAAACgAAAAYBAwADAAAAAQAGAAABGgAFAAAAAQAAAxIBGwAFAAAAAQAAAxoBKAADAAAAAQACAA\n"
    481   "ACAQAEAAAAAQAAAyICAgAEAAAAAQAACd0AAAAAAAAASAAAAAEAAABIAAAAAf/Y/+AAEEpGSUYAA\n"
    482   "QIBAEgASAAA/+0ADEFkb2JlX0NNAAL/7gAOQWRvYmUAZIAAAAAB/9sAhAAMCAgICQgMCQkMEQsK\n"
    483   "CxEVDwwMDxUYExMVExMYEQwMDAwMDBEMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMAQ0LCw0\n"
    484   "ODRAODhAUDg4OFBQODg4OFBEMDAwMDBERDAwMDAwMEQwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDA\n"
    485   "wMDAz/wAARCABkAGQDASIAAhEBAxEB/90ABAAH/8QBPwAAAQUBAQEBAQEAAAAAAAAAAwABAgQFB\n"
    486   "gcICQoLAQABBQEBAQEBAQAAAAAAAAABAAIDBAUGBwgJCgsQAAEEAQMCBAIFBwYIBQMMMwEAAhED\n"
    487   "BCESMQVBUWETInGBMgYUkaGxQiMkFVLBYjM0coLRQwclklPw4fFjczUWorKDJkSTVGRFwqN0Nhf\n"
    488   "SVeJl8rOEw9N14/NGJ5SkhbSVxNTk9KW1xdXl9VZmdoaWprbG1ub2N0dXZ3eHl6e3x9fn9xEAAg\n"
    489   "IBAgQEAwQFBgcHBgU1AQACEQMhMRIEQVFhcSITBTKBkRShsUIjwVLR8DMkYuFygpJDUxVjczTxJ\n"
    490   "QYWorKDByY1wtJEk1SjF2RFVTZ0ZeLys4TD03Xj80aUpIW0lcTU5PSltcXV5fVWZnaGlqa2xtbm\n"
    491   "9ic3R1dnd4eXp7fH/9oADAMBAAIRAxEAPwDy7bKNTUXNLz9EaJPDWMjxH4ozhtpYwaACT8ShaaW\n"
    492   "bW0uEc9/JFfjj0Q4Hk/PRDxwX7y47W9z/AN9Cv4+O3ILK2DcRqT2CaSvEbcl1Jbz37KG1dBldLo\n"
    493   "qaS4l9xGjG9v6yoDAdYIaIjUk+AREgo4y5sapirb8Yl0NHHdKvBNm4yA1o5Pc+SPEFvCWqB3HZF\n"
    494   "Hj2SbWQ/afGFP0bHP8ATY0uc4w1o1JPkkimGiS2KvqlnmBkOZQTyydzgPMM9v8A0lp4v1Nx9gF1\n"
    495   "tpdqJaGtH/S3I0i3lISXW/8AMqnd/O2bfg2eUkqVYf/Q8zuncO4Bj7lZ+n7f5Mj5KsJcY8NUZ4d\n"
    496   "uEDVo1HkeU0rg3Om4H2rabCWUN7DQuK1n5FWKW4uCwG92gDRJBS6exhxmMboQI+Cv4WFTQ42Bs2\n"
    497   "fvnkkqEmy2YxoMMbpVzaz6jt+RbpHZs8lzkHqrasKkYOKP0jgDfZ4N/wDM1tNrcWfSPmRyq9uNV\n"
    498   "DnFg2s97i7UkjxKVrq0eVz3spZsja+ASDzwsh9jnOk/JFzb3XZD3v1c4yT8UACTCniKDUnKz5Nj\n"
    499   "G33XV1DV73BrT8dF23SejV4zg9g33cOsPb+SxVvqv9ViwNy8vS0iWs/daf8A0Y5dpTi1sADGxCR\n"
    500   "K1o0YBEmInlXWYbDBcDLdPJXa8f71Yrx2jnUoAqLnfZK5hJaW2vdwEk5a/wD/0fN6Ia/e76IiVf\n"
    501   "xavUL7CPpnT4LNbYXAVjuQt/AqDmNYO/Kjnoy4hr5J8SwMhrRMaeSvbsxrfUazcOw4UX0Cisem2\n"
    502   "SBoD4+Kz8nC6llbSLCRrubJA8kwUWbUDa29X1PMa7aQWjuDC0MXMdbDbhI7eazBiUfZ6GOYRe1s\n"
    503   "WvGgJ8Vbw2+m4Bx9s6JpNHuuGo1FF53r/SHYua61gLse0lzXeBP5rkvqx0o5vVWz7WY49QkiQSP\n"
    504   "oN/tLoevW/ogxv0HA7tJ0AnhT+pdDGYVl/wCdcTPkGn2NU0JWNWvlgAbHV6fEqdu2gR/r2WlWwt\n"
    505   "AA5VXAEsLXTqJafArQY5rRr9LiPBJiZsZCI1pJjxCi0j4oncSICSkWwzwkjeaSch//0vO7sP7Lm\n"
    506   "enO9ogtd5FbPT3Q5pCpZVc4ld3Lmn3O8j9EI2BYdunKjOobMQIyI+rusc2wx4d0eutwGnHh/uQc\n"
    507   "Ha7ladj6mVANGvcqOgz0Go7HJ12/GEHcwvB/dPY6ImbbaMaASGuIBjkN7qofs9Ubg9g7OI9p/t/\n"
    508   "RTSmhTHr0v6eSz6UgCPP2/wAVu9Ex2V49dVY2iACB4BZeVXQ/AJ3gzGnnOi2+kACpru8flUsNmt\n"
    509   "zHRf6xfWCnoeAfTh2ZaQKazx/Ke7+QxcKz61fWA2uuObaC4zGhaPJrXBL64ZFmR124O09ENraPK\n"
    510   "N3/AH5GqxIrZVUyp2K2vfdkENsDnxuex9m4Ox9n82xSgNd9D+p/XR1npgseR9ppOy4Dx/NfH/CL\n"
    511   "oQJGunmvMv8AFq3KHVcq3HkYQbD2nuSf0I/rMavSg6TLjLigQhJ7Z58v9QkmlsTOqSCn/9PzL7R\n"
    512   "d6Qq3n0wZ2zotXpT9xLfFYvkr/S7jXeB8E0jRkhKpC3q8LcJ/kmCrTnkuAPCq4do9Q/ytVbuAeY\n"
    513   "Gg5lQybQK+82GBqEQUA1kOHPYf3LLsoyN36G5w8iUfHxepbXE2l0cApALgLHzBq9UxhTXU5hMC1\n"
    514   "ktnSCup6S4Ctk+C5XqVGcaHPfuiuHkeTTuWz0+9zaKiH6CC0/yXBSQ2a/MxojV57634rq+v2PLY\n"
    515   "be1r2nsYG13/AFKxbfCBMcr0brGAzrGEwCG31ncx0SfBzf7S4+zoHUWWsJq3hz9oLfcBH77R9H+\n"
    516   "0pA13u/qPgDp/Q6ri39JlfpXkDx+h/msWn1L6wdO6bSbcrIbU2Q0xLnSe21kuVejJspbVS5+4bd\n"
    517   "ocBAkD/orG+tP1ar67Wy7GtZTm1SCXfRsb+a18fRe38x6SG3/44H1Z3f0y2I+l6DoSXD/8xPrDs\n"
    518   "3enVu3bdnqN3R+//USSVo//1PLohhce+gRWS0Nsby3lRgFkKxQyW7SgUh3em5Tbq2uB9wWw1wey\n"
    519   "J1XGV2XYdm5k7e4WzidXY9oMwo5RZ4T6Hd1ixwfp96PWbAJBVTHzK7O6Ky5oJB1HZMqmUEFlkGy\n"
    520   "xpa4zI1Hkq31dy7bMN9BAc3HeWAnnbyxEycmuup1jiAGglZ31PyrmZ9tQg1WtNj54EHR3/S2qTH\n"
    521   "1Yc5GgD1FFtzPdWGkd2AyflogZmRmsz6PSrbXbdo+txOrP337f3fzVo15DK2uyrTtqpBOnBKx6b\n"
    522   "7MjJsz7tHWOAYP3WD6LU6cqGjFCNl1MmvLcxv6YtDTLSAqP27LrdtYHXFnJZI+Tp3MWg68OpDPv\n"
    523   "UMUM2lkQBoouKQ6swjE9Nml+1sz1PW+z6xt27zuj+skrX2ZvqR5z8kkuOfdPt43/1fMm/grFG6f\n"
    524   "Lss9JA7JG7tnZs/SfJUrfS3foJ9TvHCopJsV8nWx/t24bJn8Fo/5TjWJXMJIS+i+G36TsZ/7Q9P\n"
    525   "8ATfzfeOFofVSZv2/zvt+O3X/v65dJPjt/BiyfN1/wn0zre79nVej/ADG8ep4x2/6Srjd6TdviF\n"
    526   "52ko8m6/Ht9X1KnftEo+POwxzK8mSTF46vrH6T1/OEl5Okkl//Z/+0uHFBob3Rvc2hvcCAzLjAA\n"
    527   "OEJJTQQEAAAAAAArHAIAAAIAAhwCeAAfICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIAA\n"
    528   "4QklNBCUAAAAAABD7Caa9B0wqNp2P4sxXqayFOEJJTQPqAAAAAB2wPD94bWwgdmVyc2lvbj0iMS\n"
    529   "4wIiBlbmNvZGluZz0iVVRGLTgiPz4KPCFET0NUWVBFIHBsaXN0IFBVQkxJQyAiLS8vQXBwbGUgQ\n"
    530   "29tcHV0ZXIvL0RURCBQTElTVCAxLjAvL0VOIiAiaHR0cDovL3d3dy5hcHBsZS5jb20vRFREcy9Q\n"
    531   "cm9wZXJ0eUxpc3QtMS4wLmR0ZCI+CjxwbGlzdCB2ZXJzaW9uPSIxLjAiPgo8ZGljdD4KCTxrZXk\n"
    532   "+Y29tLmFwcGxlLnByaW50LlBhZ2VGb3JtYXQuUE1Ib3Jpem9udGFsUmVzPC9rZXk+Cgk8ZGljdD\n"
    533   "4KCQk8a2V5PmNvbS5hcHBsZS5wcmludC50aWNrZXQuY3JlYXRvcjwva2V5PgoJCTxzdHJpbmc+Y\n"
    534   "29tLmFwcGxlLnByaW50aW5nbWFuYWdlcjwvc3RyaW5nPgoJCTxrZXk+Y29tLmFwcGxlLnByaW50\n"
    535   "LnRpY2tldC5pdGVtQXJyYXk8L2tleT4KCQk8YXJyYXk+CgkJCTxkaWN0PgoJCQkJPGtleT5jb20\n"
    536   "uYXBwbGUucHJpbnQuUGFnZUZvcm1hdC5QTUhvcml6b250YWxSZXM8L2tleT4KCQkJCTxyZWFsPj\n"
    537   "cyPC9yZWFsPgoJCQkJPGtleT5jb20uYXBwbGUucHJpbnQudGlja2V0LmNsaWVudDwva2V5PgoJC\n"
    538   "QkJPHN0cmluZz5jb20uYXBwbGUucHJpbnRpbmdtYW5hZ2VyPC9zdHJpbmc+CgkJCQk8a2V5PmNv\n"
    539   "bS5hcHBsZS5wcmludC50aWNrZXQubW9kRGF0ZTwva2V5PgoJCQkJPGRhdGU+MjAwNy0wMS0zMFQ\n"
    540   "yMjowODo0MVo8L2RhdGU+CgkJCQk8a2V5PmNvbS5hcHBsZS5wcmludC50aWNrZXQuc3RhdGVGbG\n"
    541   "FnPC9rZXk+CgkJCQk8aW50ZWdlcj4wPC9pbnRlZ2VyPgoJCQk8L2RpY3Q+CgkJPC9hcnJheT4KC\n"
    542   "TwvZGljdD4KCTxrZXk+Y29tLmFwcGxlLnByaW50LlBhZ2VGb3JtYXQuUE1PcmllbnRhdGlvbjwv\n"
    543   "a2V5PgoJPGRpY3Q+CgkJPGtleT5jb20uYXBwbGUucHJpbnQudGlja2V0LmNyZWF0b3I8L2tleT4\n"
    544   "KCQk8c3RyaW5nPmNvbS5hcHBsZS5wcmludGluZ21hbmFnZXI8L3N0cmluZz4KCQk8a2V5PmNvbS\n"
    545   "5hcHBsZS5wcmludC50aWNrZXQuaXRlbUFycmF5PC9rZXk+CgkJPGFycmF5PgoJCQk8ZGljdD4KC\n"
    546   "QkJCTxrZXk+Y29tLmFwcGxlLnByaW50LlBhZ2VGb3JtYXQuUE1PcmllbnRhdGlvbjwva2V5PgoJ\n"
    547   "CQkJPGludGVnZXI+MTwvaW50ZWdlcj4KCQkJCTxrZXk+Y29tLmFwcGxlLnByaW50LnRpY2tldC5\n"
    548   "jbGllbnQ8L2tleT4KCQkJCTxzdHJpbmc+Y29tLmFwcGxlLnByaW50aW5nbWFuYWdlcjwvc3RyaW\n"
    549   "5nPgoJCQkJPGtleT5jb20uYXBwbGUucHJpbnQudGlja2V0Lm1vZERhdGU8L2tleT4KCQkJCTxkY\n"
    550   "XRlPjIwMDctMDEtMzBUMjI6MDg6NDFaPC9kYXRlPgoJCQkJPGtleT5jb20uYXBwbGUucHJpbnQu\n"
    551   "dGlja2V0LnN0YXRlRmxhZzwva2V5PgoJCQkJPGludGVnZXI+MDwvaW50ZWdlcj4KCQkJPC9kaWN\n"
    552   "0PgoJCTwvYXJyYXk+Cgk8L2RpY3Q+Cgk8a2V5PmNvbS5hcHBsZS5wcmludC5QYWdlRm9ybWF0Ll\n"
    553   "BNU2NhbGluZzwva2V5PgoJPGRpY3Q+CgkJPGtleT5jb20uYXBwbGUucHJpbnQudGlja2V0LmNyZ\n"
    554   "WF0b3I8L2tleT4KCQk8c3RyaW5nPmNvbS5hcHBsZS5wcmludGluZ21hbmFnZXI8L3N0cmluZz4K\n"
    555   "CQk8a2V5PmNvbS5hcHBsZS5wcmludC50aWNrZXQuaXRlbUFycmF5PC9rZXk+CgkJPGFycmF5Pgo\n"
    556   "JCQk8ZGljdD4KCQkJCTxrZXk+Y29tLmFwcGxlLnByaW50LlBhZ2VGb3JtYXQuUE1TY2FsaW5nPC\n"
    557   "9rZXk+CgkJCQk8cmVhbD4xPC9yZWFsPgoJCQkJPGtleT5jb20uYXBwbGUucHJpbnQudGlja2V0L\n"
    558   "mNsaWVudDwva2V5PgoJCQkJPHN0cmluZz5jb20uYXBwbGUucHJpbnRpbmdtYW5hZ2VyPC9zdHJp\n"
    559   "bmc+CgkJCQk8a2V5PmNvbS5hcHBsZS5wcmludC50aWNrZXQubW9kRGF0ZTwva2V5PgoJCQkJPGR\n"
    560   "hdGU+MjAwNy0wMS0zMFQyMjowODo0MVo8L2RhdGU+CgkJCQk8a2V5PmNvbS5hcHBsZS5wcmludC\n"
    561   "50aWNrZXQuc3RhdGVGbGFnPC9rZXk+CgkJCQk8aW50ZWdlcj4wPC9pbnRlZ2VyPgoJCQk8L2RpY\n"
    562   "3Q+CgkJPC9hcnJheT4KCTwvZGljdD4KCTxrZXk+Y29tLmFwcGxlLnByaW50LlBhZ2VGb3JtYXQu\n"
    563   "UE1WZXJ0aWNhbFJlczwva2V5PgoJPGRpY3Q+CgkJPGtleT5jb20uYXBwbGUucHJpbnQudGlja2V\n"
    564   "0LmNyZWF0b3I8L2tleT4KCQk8c3RyaW5nPmNvbS5hcHBsZS5wcmludGluZ21hbmFnZXI8L3N0cm\n"
    565   "luZz4KCQk8a2V5PmNvbS5hcHBsZS5wcmludC50aWNrZXQuaXRlbUFycmF5PC9rZXk+CgkJPGFyc\n"
    566   "mF5PgoJCQk8ZGljdD4KCQkJCTxrZXk+Y29tLmFwcGxlLnByaW50LlBhZ2VGb3JtYXQuUE1WZXJ0\n"
    567   "aWNhbFJlczwva2V5PgoJCQkJPHJlYWw+NzI8L3JlYWw+CgkJCQk8a2V5PmNvbS5hcHBsZS5wcml\n"
    568   "udC50aWNrZXQuY2xpZW50PC9rZXk+CgkJCQk8c3RyaW5nPmNvbS5hcHBsZS5wcmludGluZ21hbm\n"
    569   "FnZXI8L3N0cmluZz4KCQkJCTxrZXk+Y29tLmFwcGxlLnByaW50LnRpY2tldC5tb2REYXRlPC9rZ\n"
    570   "Xk+CgkJCQk8ZGF0ZT4yMDA3LTAxLTMwVDIyOjA4OjQxWjwvZGF0ZT4KCQkJCTxrZXk+Y29tLmFw\n"
    571   "cGxlLnByaW50LnRpY2tldC5zdGF0ZUZsYWc8L2tleT4KCQkJCTxpbnRlZ2VyPjA8L2ludGVnZXI\n"
    572   "+CgkJCTwvZGljdD4KCQk8L2FycmF5PgoJPC9kaWN0PgoJPGtleT5jb20uYXBwbGUucHJpbnQuUG\n"
    573   "FnZUZvcm1hdC5QTVZlcnRpY2FsU2NhbGluZzwva2V5PgoJPGRpY3Q+CgkJPGtleT5jb20uYXBwb\n"
    574   "GUucHJpbnQudGlja2V0LmNyZWF0b3I8L2tleT4KCQk8c3RyaW5nPmNvbS5hcHBsZS5wcmludGlu\n"
    575   "Z21hbmFnZXI8L3N0cmluZz4KCQk8a2V5PmNvbS5hcHBsZS5wcmludC50aWNrZXQuaXRlbUFycmF\n"
    576   "5PC9rZXk+CgkJPGFycmF5PgoJCQk8ZGljdD4KCQkJCTxrZXk+Y29tLmFwcGxlLnByaW50LlBhZ2\n"
    577   "VGb3JtYXQuUE1WZXJ0aWNhbFNjYWxpbmc8L2tleT4KCQkJCTxyZWFsPjE8L3JlYWw+CgkJCQk8a\n"
    578   "2V5PmNvbS5hcHBsZS5wcmludC50aWNrZXQuY2xpZW50PC9rZXk+CgkJCQk8c3RyaW5nPmNvbS5h\n"
    579   "cHBsZS5wcmludGluZ21hbmFnZXI8L3N0cmluZz4KCQkJCTxrZXk+Y29tLmFwcGxlLnByaW50LnR\n"
    580   "pY2tldC5tb2REYXRlPC9rZXk+CgkJCQk8ZGF0ZT4yMDA3LTAxLTMwVDIyOjA4OjQxWjwvZGF0ZT\n"
    581   "4KCQkJCTxrZXk+Y29tLmFwcGxlLnByaW50LnRpY2tldC5zdGF0ZUZsYWc8L2tleT4KCQkJCTxpb\n"
    582   "nRlZ2VyPjA8L2ludGVnZXI+CgkJCTwvZGljdD4KCQk8L2FycmF5PgoJPC9kaWN0PgoJPGtleT5j\n"
    583   "b20uYXBwbGUucHJpbnQuc3ViVGlja2V0LnBhcGVyX2luZm9fdGlja2V0PC9rZXk+Cgk8ZGljdD4\n"
    584   "KCQk8a2V5PmNvbS5hcHBsZS5wcmludC5QYWdlRm9ybWF0LlBNQWRqdXN0ZWRQYWdlUmVjdDwva2\n"
    585   "V5PgoJCTxkaWN0PgoJCQk8a2V5PmNvbS5hcHBsZS5wcmludC50aWNrZXQuY3JlYXRvcjwva2V5P\n"
    586   "goJCQk8c3RyaW5nPmNvbS5hcHBsZS5wcmludGluZ21hbmFnZXI8L3N0cmluZz4KCQkJPGtleT5j\n"
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    883   "WxhmpWQJ9NW3zZPHz5vlb/nIDVbrWfzO1RJhxGnpDaRL/khA1T7ktmSOTAJhZaAUtLawsbayl8v\n"
    884   "xWi3Gpay0cF3HPcFRJJHJMXVrcJ8UaAFG5LWjF8tAYW9H/wCcOo9bTzxrt/owkTyksZW5gkIKvI\n"
    885   "7k26nvyReRJHyyBWT7dWQyOWlbnK2526e1O1MqIUFE84uPLkOdK9RXI0E2/wD/1/DA1bURZLY/W\n"
    886   "ZDZqwb0eXw7dMgIi7bjllVXsz7yNcfWC0Vd3Ip92Y2UOz0cnsPlwyx8xQ/u24sMxCadoJp9LOXk\n"
    887   "VX/uwRUE0BI8cokbLMyoKouHu2MaKGXw7fLDwgoGSkbHpaNZyLLHRSKcFFQQRvUdMlwUFOQyLzr\n"
    888   "ztpCaba6fPau4ijv4OURY8AjVFKV7ZZiO+7Vnh6XvXkSWNbW2WTb92KDxIFMzwHlZc3zX+fuizW\n"
    889   "f5p3ty8XGDU4YLmCQiisyII3+4rvl8UB5ffEghRGvOm7AbnvWvjk1fen/ONPldPKP5aWOpPCfr2\n"
    890   "uE31y6q2wbaMEn+VAMDSdyzrzj+avlHyTp0l/r2rxWFuHWJuIeacu4qFCRgsajfBwsty89/6Gr/\n"
    891   "ACa9an+JL/hSnrfoubhXwpXpjwhaL//Q8E1AqtcAZMs8l6i1nqMa1oSVP0VynKLDmaWdSfQXl69\n"
    892   "jF1Jv8MhDb5rpB3AO7INRRLhhGp4R05FgaGvTMU8200xS70zVDMRp2pTIOvBmB3PgQP15kxIcnD\n"
    893   "LH/EEz0rRvOJhldr9pQtCqyd6VrShGTqw5d4ARv9jHfOGl+ZJNMluLkyenaFbiRdqFYW5nrWuwO\n"
    894   "MKB5MdSMRxnhlu9N8p6lLFpti63FUjCtFJTrDKvse2bEDZ4XJ9RZB+YPli2/Mjy5bxoUi1a0YS2\n"
    895   "85UOwIXiy9jRu+TBppfOF1+V3m22vrdpNPM8cs/oo0VJlUqQPjValR3+IZNNvtLS9Yu9Mi0/TJr\n"
    896   "kyp6QhWVVCIWRATsKBemwwFrDzT87fybs/wA1bW21PRb+DTvNlgGSRp6iC8i3KJJx+y6n7D0Pwm\n"
    897   "hxBZXT55/6Fi/Nf0PW+qWXq+t6X1X67F6vD/ftK04V/wBl344U8b//0fBapxheVh9ocV+nviqY2\n"
    898   "/qQJDew/bioWHiuQ8m0bbvaPKGtQ6jaxSo9JloCK75gZI0Xb4sgkHo8MouoAvP94BsRmGY7uWJU\n"
    899   "gzbypOQpNOvIdK4Nw2WCE2tXulTkjEEbdafgclxMhFBas93dwyQzsWDghlJFONKHJCZtjOFBJfy\n"
    900   "j1y9vPL9zpbIs0WkXL2sUjA8hDXlGCRXtt07ZuYvL5KJeo6bfajbkzWkcToR8dqshZ6in2fhNK/\n"
    901   "PDTUlXmHVvMdr5o0v9H2kdrqGpfu7m0nkY87Uf7tkKAU4/s03ynLkEBbfihx7dGT6va67LbRMNR\n"
    902   "aKOBuUTKgIBXoK1BOYR1M3aQ0mOt9yxUeZNdtJhFapLqMluSXkg5oxJrUMW5KevQ9MmNXXNqOiH\n"
    903   "Rr/Hmv8A1r9I/oj95w+r+j9Yf1+NP5+nXtTD+dF8tkfkOlv/0vC3ph7f0/alcVTbS4A8QibuKb5\n"
    904   "RI05EBYRFpdX3ly79a2qYCavH/EY7TCYyMD5PSdD8+wXUSn1ArDqOhBzFlipz4ZwWbaV5htbsgF\n"
    905   "qg9crMXKErGyYwajFGzxyHlGSePbbwyqg5UZlCaxrFpaWU95LIqrEjMAT4Dp9OShGy1ZslBhv/A\n"
    906   "Dj9rd/a+aL+xUK+m38L3d0HrxRo2HFtu5D8c27y8t30raarbWkU+u6g4gsNORn+EcUaSh2Pc0/4\n"
    907   "lgtAjezzbT9SutY1i782al8Nxdyotqh6xWybIg+jc5q8s+I27bFDgFPQp9RE+nrag70+L6crrZu\n"
    908   "4jajokdv6LW/Dii1Wo61PXKQN3KPK0L+h4/rnD/K5V78a5LhXxd3/0/DMXXtwxVNtL9Xkaf3f7N\n"
    909   "etfbKMjdjtkZ9D6ufrlK0+HpX8coF9HJ26sXvfqXrf7i/U+uften/d/wCyrmQL6uOav0pvpP8Ai\n"
    910   "b1F+rV59+vH6a5XLhcjH4nRmY/xpxHP0/UptWvT6Mx/RbmjxWK+aP8AFf1M/pCv1Kvxen9inavf\n"
    911   "MrFwXtzcLUeLXq5Mv/I3nz1b0v8AjofuKVry9KrUpTanOlf9jmQ68va/zH9b/COn/o7/AI431mP\n"
    912   "65SvLh+zWvbl9rMfNfC34K4kmj9T6lD6FKclp/DNYXZx5srsPrHor6nXvkgxTPS/U+rv6dPU5mt\n"
    913   "fngFN5ulv+l/pL/Lp/scerHo//2Q==\n";
    914 
    915 static std::string gCommandLine;
    916 
    917 TEST(Base64, LargeSample) {
    918   LOG(LS_VERBOSE) << "Testing specific base64 file";
    919 
    920   char unescaped[64 * 1024];
    921 
    922   // unescape that massive blob above
    923   size_t size = Base64Unescape(SpecificTest,
    924                             sizeof(SpecificTest),
    925                             unescaped,
    926                             sizeof(unescaped));
    927 
    928   EXPECT_EQ(size, sizeof(testbase64));
    929   EXPECT_EQ(0, memcmp(testbase64, unescaped, sizeof(testbase64)));
    930 }
    931 
    932 bool DecodeTest(const char* encoded, size_t expect_unparsed,
    933                 const char* decoded, Base64::DecodeFlags flags)
    934 {
    935   std::string result;
    936   size_t consumed = 0, encoded_len = strlen(encoded);
    937   bool success = Base64::DecodeFromArray(encoded, encoded_len, flags,
    938                                          &result, &consumed);
    939   size_t unparsed = encoded_len - consumed;
    940   EXPECT_EQ(expect_unparsed, unparsed) << "\"" << encoded
    941                                        << "\" -> \"" << decoded
    942                                        << "\"";
    943   EXPECT_STREQ(decoded, result.c_str());
    944   return success;
    945 }
    946 
    947 #define Flags(x,y,z) \
    948   Base64::DO_PARSE_##x | Base64::DO_PAD_##y | Base64::DO_TERM_##z
    949 
    950 TEST(Base64, DecodeParseOptions) {
    951   // Trailing whitespace
    952   EXPECT_TRUE (DecodeTest("YWJjZA== ", 1, "abcd", Flags(STRICT, YES, CHAR)));
    953   EXPECT_TRUE (DecodeTest("YWJjZA== ", 0, "abcd", Flags(WHITE,  YES, CHAR)));
    954   EXPECT_TRUE (DecodeTest("YWJjZA== ", 0, "abcd", Flags(ANY,    YES, CHAR)));
    955 
    956   // Embedded whitespace
    957   EXPECT_FALSE(DecodeTest("YWJjZA= =", 3, "abcd", Flags(STRICT, YES, CHAR)));
    958   EXPECT_TRUE (DecodeTest("YWJjZA= =", 0, "abcd", Flags(WHITE,  YES, CHAR)));
    959   EXPECT_TRUE (DecodeTest("YWJjZA= =", 0, "abcd", Flags(ANY,    YES, CHAR)));
    960 
    961   // Embedded non-base64 characters
    962   EXPECT_FALSE(DecodeTest("YWJjZA=*=", 3, "abcd", Flags(STRICT, YES, CHAR)));
    963   EXPECT_FALSE(DecodeTest("YWJjZA=*=", 3, "abcd", Flags(WHITE,  YES, CHAR)));
    964   EXPECT_TRUE (DecodeTest("YWJjZA=*=", 0, "abcd", Flags(ANY,    YES, CHAR)));
    965 
    966   // Unexpected padding characters
    967   EXPECT_FALSE(DecodeTest("YW=JjZA==", 7, "a",    Flags(STRICT, YES, CHAR)));
    968   EXPECT_FALSE(DecodeTest("YW=JjZA==", 7, "a",    Flags(WHITE,  YES, CHAR)));
    969   EXPECT_TRUE (DecodeTest("YW=JjZA==", 0, "abcd", Flags(ANY,    YES, CHAR)));
    970 }
    971 
    972 TEST(Base64, DecodePadOptions) {
    973   // Padding
    974   EXPECT_TRUE (DecodeTest("YWJjZA==",  0, "abcd", Flags(STRICT, YES, CHAR)));
    975   EXPECT_TRUE (DecodeTest("YWJjZA==",  0, "abcd", Flags(STRICT, ANY, CHAR)));
    976   EXPECT_TRUE (DecodeTest("YWJjZA==",  2, "abcd", Flags(STRICT, NO,  CHAR)));
    977 
    978   // Incomplete padding
    979   EXPECT_FALSE(DecodeTest("YWJjZA=",   1, "abcd", Flags(STRICT, YES, CHAR)));
    980   EXPECT_TRUE (DecodeTest("YWJjZA=",   1, "abcd", Flags(STRICT, ANY, CHAR)));
    981   EXPECT_TRUE (DecodeTest("YWJjZA=",   1, "abcd", Flags(STRICT, NO,  CHAR)));
    982 
    983   // No padding
    984   EXPECT_FALSE(DecodeTest("YWJjZA",    0, "abcd", Flags(STRICT, YES, CHAR)));
    985   EXPECT_TRUE (DecodeTest("YWJjZA",    0, "abcd", Flags(STRICT, ANY, CHAR)));
    986   EXPECT_TRUE (DecodeTest("YWJjZA",    0, "abcd", Flags(STRICT, NO,  CHAR)));
    987 }
    988 
    989 TEST(Base64, DecodeTerminateOptions) {
    990   // Complete quantum
    991   EXPECT_TRUE (DecodeTest("YWJj",      0, "abc",  Flags(STRICT, NO,  BUFFER)));
    992   EXPECT_TRUE (DecodeTest("YWJj",      0, "abc",  Flags(STRICT, NO,  CHAR)));
    993   EXPECT_TRUE (DecodeTest("YWJj",      0, "abc",  Flags(STRICT, NO,  ANY)));
    994 
    995   // Complete quantum with trailing data
    996   EXPECT_FALSE(DecodeTest("YWJj*",     1, "abc",  Flags(STRICT, NO,  BUFFER)));
    997   EXPECT_TRUE (DecodeTest("YWJj*",     1, "abc",  Flags(STRICT, NO,  CHAR)));
    998   EXPECT_TRUE (DecodeTest("YWJj*",     1, "abc",  Flags(STRICT, NO,  ANY)));
    999 
   1000   // Incomplete quantum
   1001   EXPECT_FALSE(DecodeTest("YWJ",       0, "ab",   Flags(STRICT, NO,  BUFFER)));
   1002   EXPECT_FALSE(DecodeTest("YWJ",       0, "ab",   Flags(STRICT, NO,  CHAR)));
   1003   EXPECT_TRUE (DecodeTest("YWJ",       0, "ab",   Flags(STRICT, NO,  ANY)));
   1004 }
   1005 
   1006 TEST(Base64, GetNextBase64Char) {
   1007   // The table looks like this:
   1008   // "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
   1009   char next_char;
   1010   EXPECT_TRUE(Base64::GetNextBase64Char('A', &next_char));
   1011   EXPECT_EQ('B', next_char);
   1012   EXPECT_TRUE(Base64::GetNextBase64Char('Z', &next_char));
   1013   EXPECT_EQ('a', next_char);
   1014   EXPECT_TRUE(Base64::GetNextBase64Char('/', &next_char));
   1015   EXPECT_EQ('A', next_char);
   1016   EXPECT_FALSE(Base64::GetNextBase64Char('&', &next_char));
   1017   EXPECT_FALSE(Base64::GetNextBase64Char('Z', NULL));
   1018 }
   1019