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BCrypt implementation in Oracle 12c PL/SQL.sql

Jan 28th, 2020
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  1. /* We don't want the & symbol in the JAVA source to prompt for input, so turn off substition strings */
  2. SET DEFINE OFF
  3.  
  4. CREATE OR REPLACE AND COMPILE JAVA SOURCE NAMED bcrypt AS
  5.  
  6. import java.io.UnsupportedEncodingException;
  7. import java.security.SecureRandom;
  8.  
  9. /**
  10.  * Implementation of PasswordEncoder that uses the BCrypt strong hashing
  11.  * function. The larger the rounds parameter the more work will have to be done
  12.  * (exponentially) to hash the passwords.
  13.  *
  14.  * @author Dave Syer. Updated for Oracle 12c by Emily Johnson
  15.  *
  16.  */
  17. public class BCryptPasswordEncoder {
  18.     /**
  19.      * Encodes a string using the BCrypt algorithm
  20.      *
  21.      * @param rawPassword the string to encode
  22.      * @param rounds the number of log rounds
  23.      * @return encoded string
  24.     */
  25.     public static String encode(CharSequence rawPassword, Integer rounds) {
  26.         String salt;
  27.  
  28.         SecureRandom random = new SecureRandom();
  29.         if (rounds > 0) {
  30.             if (random != null) {
  31.                 salt = BCrypt.gensalt(rounds, random);
  32.             } else {
  33.                 salt = BCrypt.gensalt(rounds);
  34.             }
  35.         } else {
  36.             salt = BCrypt.gensalt();
  37.         }
  38.         return BCrypt.hashpw(rawPassword.toString(), salt);
  39.     }
  40.  
  41.     /**
  42.      * Checks if a string matches a BCrypt encoded string
  43.      *
  44.      * @param rawPassword the string to match
  45.      * @param encodedPassword encoded string to match against
  46.      * @return 1 if match, 0 if it doesn't match
  47.     */
  48.     public static Integer matches(CharSequence rawPassword, String encodedPassword) {
  49.         return BCrypt.checkpw(rawPassword.toString(), encodedPassword) == true ? 1 : 0;
  50.     }
  51. }
  52.  
  53. class BCrypt {
  54.     // BCrypt parameters
  55.     private static final int GENSALT_DEFAULT_LOG2_ROUNDS = 10;
  56.     private static final int BCRYPT_SALT_LEN = 16;
  57.  
  58.     // Blowfish parameters
  59.     private static final int BLOWFISH_NUM_ROUNDS = 16;
  60.  
  61.     // Initial contents of key schedule
  62.     private static final int P_orig[] = {
  63.         0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344,
  64.         0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89,
  65.         0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c,
  66.         0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917,
  67.         0x9216d5d9, 0x8979fb1b
  68.     };
  69.     private static final int S_orig[] = {
  70.         0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7,
  71.         0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99,
  72.         0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16,
  73.         0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e,
  74.         0x0d95748f, 0x728eb658, 0x718bcd58, 0x82154aee,
  75.         0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013,
  76.         0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef,
  77.         0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e,
  78.         0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60,
  79.         0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440,
  80.         0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce,
  81.         0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a,
  82.         0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e,
  83.         0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677,
  84.         0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193,
  85.         0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032,
  86.         0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88,
  87.         0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239,
  88.         0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e,
  89.         0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0,
  90.         0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3,
  91.         0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98,
  92.         0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88,
  93.         0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe,
  94.         0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6,
  95.         0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d,
  96.         0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b,
  97.         0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7,
  98.         0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x04c006ba,
  99.         0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463,
  100.         0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f,
  101.         0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09,
  102.         0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3,
  103.         0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb,
  104.         0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279,
  105.         0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8,
  106.         0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab,
  107.         0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82,
  108.         0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db,
  109.         0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573,
  110.         0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0,
  111.         0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b,
  112.         0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790,
  113.         0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8,
  114.         0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4,
  115.         0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0,
  116.         0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7,
  117.         0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c,
  118.         0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad,
  119.         0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1,
  120.         0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299,
  121.         0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9,
  122.         0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477,
  123.         0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf,
  124.         0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49,
  125.         0x00250e2d, 0x2071b35e, 0x226800bb, 0x57b8e0af,
  126.         0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa,
  127.         0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5,
  128.         0x83260376, 0x6295cfa9, 0x11c81968, 0x4e734a41,
  129.         0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915,
  130.         0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400,
  131.         0x08ba6fb5, 0x571be91f, 0xf296ec6b, 0x2a0dd915,
  132.         0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664,
  133.         0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a,
  134.         0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623,
  135.         0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266,
  136.         0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1,
  137.         0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e,
  138.         0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6,
  139.         0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1,
  140.         0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x021ecc5e,
  141.         0x09686b3f, 0x3ebaefc9, 0x3c971814, 0x6b6a70a1,
  142.         0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737,
  143.         0x3e07841c, 0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8,
  144.         0xb03ada37, 0xf0500c0d, 0xf01c1f04, 0x0200b3ff,
  145.         0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd,
  146.         0xd19113f9, 0x7ca92ff6, 0x94324773, 0x22f54701,
  147.         0x3ae5e581, 0x37c2dadc, 0xc8b57634, 0x9af3dda7,
  148.         0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41,
  149.         0xe238cd99, 0x3bea0e2f, 0x3280bba1, 0x183eb331,
  150.         0x4e548b38, 0x4f6db908, 0x6f420d03, 0xf60a04bf,
  151.         0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af,
  152.         0xde9a771f, 0xd9930810, 0xb38bae12, 0xdccf3f2e,
  153.         0x5512721f, 0x2e6b7124, 0x501adde6, 0x9f84cd87,
  154.         0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c,
  155.         0xec7aec3a, 0xdb851dfa, 0x63094366, 0xc464c3d2,
  156.         0xef1c1847, 0x3215d908, 0xdd433b37, 0x24c2ba16,
  157.         0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd,
  158.         0x71dff89e, 0x10314e55, 0x81ac77d6, 0x5f11199b,
  159.         0x043556f1, 0xd7a3c76b, 0x3c11183b, 0x5924a509,
  160.         0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e,
  161.         0x86e34570, 0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3,
  162.         0x771fe71c, 0x4e3d06fa, 0x2965dcb9, 0x99e71d0f,
  163.         0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a,
  164.         0xc6150eba, 0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4,
  165.         0xf2f74ea7, 0x361d2b3d, 0x1939260f, 0x19c27960,
  166.         0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66,
  167.         0xe3bc4595, 0xa67bc883, 0xb17f37d1, 0x018cff28,
  168.         0xc332ddef, 0xbe6c5aa5, 0x65582185, 0x68ab9802,
  169.         0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84,
  170.         0x1521b628, 0x29076170, 0xecdd4775, 0x619f1510,
  171.         0x13cca830, 0xeb61bd96, 0x0334fe1e, 0xaa0363cf,
  172.         0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14,
  173.         0xeecc86bc, 0x60622ca7, 0x9cab5cab, 0xb2f3846e,
  174.         0x648b1eaf, 0x19bdf0ca, 0xa02369b9, 0x655abb50,
  175.         0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7,
  176.         0x9b540b19, 0x875fa099, 0x95f7997e, 0x623d7da8,
  177.         0xf837889a, 0x97e32d77, 0x11ed935f, 0x16681281,
  178.         0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99,
  179.         0x57f584a5, 0x1b227263, 0x9b83c3ff, 0x1ac24696,
  180.         0xcdb30aeb, 0x532e3054, 0x8fd948e4, 0x6dbc3128,
  181.         0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73,
  182.         0x5d4a14d9, 0xe864b7e3, 0x42105d14, 0x203e13e0,
  183.         0x45eee2b6, 0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0,
  184.         0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105,
  185.         0xd81e799e, 0x86854dc7, 0xe44b476a, 0x3d816250,
  186.         0xcf62a1f2, 0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3,
  187.         0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285,
  188.         0x095bbf00, 0xad19489d, 0x1462b174, 0x23820e00,
  189.         0x58428d2a, 0x0c55f5ea, 0x1dadf43e, 0x233f7061,
  190.         0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb,
  191.         0x7cde3759, 0xcbee7460, 0x4085f2a7, 0xce77326e,
  192.         0xa6078084, 0x19f8509e, 0xe8efd855, 0x61d99735,
  193.         0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc,
  194.         0x9e447a2e, 0xc3453484, 0xfdd56705, 0x0e1e9ec9,
  195.         0xdb73dbd3, 0x105588cd, 0x675fda79, 0xe3674340,
  196.         0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20,
  197.         0x153e21e7, 0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7,
  198.         0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934,
  199.         0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068,
  200.         0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af,
  201.         0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840,
  202.         0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45,
  203.         0xbfbc09ec, 0x03bd9785, 0x7fac6dd0, 0x31cb8504,
  204.         0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a,
  205.         0x28507825, 0x530429f4, 0x0a2c86da, 0xe9b66dfb,
  206.         0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee,
  207.         0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6,
  208.         0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42,
  209.         0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b,
  210.         0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2,
  211.         0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb,
  212.         0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527,
  213.         0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b,
  214.         0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33,
  215.         0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c,
  216.         0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3,
  217.         0x95c11548, 0xe4c66d22, 0x48c1133f, 0xc70f86dc,
  218.         0x07f9c9ee, 0x41041f0f, 0x404779a4, 0x5d886e17,
  219.         0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564,
  220.         0x257b7834, 0x602a9c60, 0xdff8e8a3, 0x1f636c1b,
  221.         0x0e12b4c2, 0x02e1329e, 0xaf664fd1, 0xcad18115,
  222.         0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922,
  223.         0x85b2a20e, 0xe6ba0d99, 0xde720c8c, 0x2da2f728,
  224.         0xd0127845, 0x95b794fd, 0x647d0862, 0xe7ccf5f0,
  225.         0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e,
  226.         0x0a476341, 0x992eff74, 0x3a6f6eab, 0xf4f8fd37,
  227.         0xa812dc60, 0xa1ebddf8, 0x991be14c, 0xdb6e6b0d,
  228.         0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804,
  229.         0xf1290dc7, 0xcc00ffa3, 0xb5390f92, 0x690fed0b,
  230.         0x667b9ffb, 0xcedb7d9c, 0xa091cf0b, 0xd9155ea3,
  231.         0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb,
  232.         0x37392eb3, 0xcc115979, 0x8026e297, 0xf42e312d,
  233.         0x6842ada7, 0xc66a2b3b, 0x12754ccc, 0x782ef11c,
  234.         0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350,
  235.         0x1a6b1018, 0x11caedfa, 0x3d25bdd8, 0xe2e1c3c9,
  236.         0x44421659, 0x0a121386, 0xd90cec6e, 0xd5abea2a,
  237.         0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe,
  238.         0x9dbc8057, 0xf0f7c086, 0x60787bf8, 0x6003604d,
  239.         0xd1fd8346, 0xf6381fb0, 0x7745ae04, 0xd736fccc,
  240.         0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f,
  241.         0x77a057be, 0xbde8ae24, 0x55464299, 0xbf582e61,
  242.         0x4e58f48f, 0xf2ddfda2, 0xf474ef38, 0x8789bdc2,
  243.         0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9,
  244.         0x7aeb2661, 0x8b1ddf84, 0x846a0e79, 0x915f95e2,
  245.         0x466e598e, 0x20b45770, 0x8cd55591, 0xc902de4c,
  246.         0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e,
  247.         0xb77f19b6, 0xe0a9dc09, 0x662d09a1, 0xc4324633,
  248.         0xe85a1f02, 0x09f0be8c, 0x4a99a025, 0x1d6efe10,
  249.         0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169,
  250.         0xdcb7da83, 0x573906fe, 0xa1e2ce9b, 0x4fcd7f52,
  251.         0x50115e01, 0xa70683fa, 0xa002b5c4, 0x0de6d027,
  252.         0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5,
  253.         0xf0177a28, 0xc0f586e0, 0x006058aa, 0x30dc7d62,
  254.         0x11e69ed7, 0x2338ea63, 0x53c2dd94, 0xc2c21634,
  255.         0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76,
  256.         0x6f05e409, 0x4b7c0188, 0x39720a3d, 0x7c927c24,
  257.         0x86e3725f, 0x724d9db9, 0x1ac15bb4, 0xd39eb8fc,
  258.         0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4,
  259.         0x1e50ef5e, 0xb161e6f8, 0xa28514d9, 0x6c51133c,
  260.         0x6fd5c7e7, 0x56e14ec4, 0x362abfce, 0xddc6c837,
  261.         0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0,
  262.         0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b,
  263.         0x5cb0679e, 0x4fa33742, 0xd3822740, 0x99bc9bbe,
  264.         0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b,
  265.         0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4,
  266.         0x5748ab2f, 0xbc946e79, 0xc6a376d2, 0x6549c2c8,
  267.         0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6,
  268.         0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304,
  269.         0xa1fad5f0, 0x6a2d519a, 0x63ef8ce2, 0x9a86ee22,
  270.         0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4,
  271.         0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6,
  272.         0x2826a2f9, 0xa73a3ae1, 0x4ba99586, 0xef5562e9,
  273.         0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59,
  274.         0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593,
  275.         0xe990fd5a, 0x9e34d797, 0x2cf0b7d9, 0x022b8b51,
  276.         0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28,
  277.         0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c,
  278.         0xe029ac71, 0xe019a5e6, 0x47b0acfd, 0xed93fa9b,
  279.         0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28,
  280.         0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c,
  281.         0x15056dd4, 0x88f46dba, 0x03a16125, 0x0564f0bd,
  282.         0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a,
  283.         0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319,
  284.         0x7533d928, 0xb155fdf5, 0x03563482, 0x8aba3cbb,
  285.         0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f,
  286.         0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991,
  287.         0xea7a90c2, 0xfb3e7bce, 0x5121ce64, 0x774fbe32,
  288.         0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680,
  289.         0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166,
  290.         0xb39a460a, 0x6445c0dd, 0x586cdecf, 0x1c20c8ae,
  291.         0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb,
  292.         0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5,
  293.         0x72eacea8, 0xfa6484bb, 0x8d6612ae, 0xbf3c6f47,
  294.         0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370,
  295.         0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d,
  296.         0x4040cb08, 0x4eb4e2cc, 0x34d2466a, 0x0115af84,
  297.         0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048,
  298.         0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8,
  299.         0x611560b1, 0xe7933fdc, 0xbb3a792b, 0x344525bd,
  300.         0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9,
  301.         0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7,
  302.         0x1a908749, 0xd44fbd9a, 0xd0dadecb, 0xd50ada38,
  303.         0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f,
  304.         0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c,
  305.         0xbf97222c, 0x15e6fc2a, 0x0f91fc71, 0x9b941525,
  306.         0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1,
  307.         0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442,
  308.         0xe0ec6e0e, 0x1698db3b, 0x4c98a0be, 0x3278e964,
  309.         0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e,
  310.         0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8,
  311.         0xdf359f8d, 0x9b992f2e, 0xe60b6f47, 0x0fe3f11d,
  312.         0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f,
  313.         0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299,
  314.         0xf523f357, 0xa6327623, 0x93a83531, 0x56cccd02,
  315.         0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc,
  316.         0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614,
  317.         0xe6c6c7bd, 0x327a140a, 0x45e1d006, 0xc3f27b9a,
  318.         0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6,
  319.         0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b,
  320.         0x53113ec0, 0x1640e3d3, 0x38abbd60, 0x2547adf0,
  321.         0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060,
  322.         0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e,
  323.         0x1948c25c, 0x02fb8a8c, 0x01c36ae4, 0xd6ebe1f9,
  324.         0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f,
  325.         0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6
  326.     };
  327.  
  328.     // bcrypt IV: "OrpheanBeholderScryDoubt"
  329.     static private final int bf_crypt_ciphertext[] = {
  330.         0x4f727068, 0x65616e42, 0x65686f6c,
  331.         0x64657253, 0x63727944, 0x6f756274
  332.     };
  333.  
  334.     // Table for Base64 encoding
  335.     static private final char base64_code[] = {
  336.         '.', '/', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
  337.         'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
  338.         'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h',
  339.         'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
  340.         'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5',
  341.         '6', '7', '8', '9'
  342.     };
  343.  
  344.     // Table for Base64 decoding
  345.     static private final byte index_64[] = {
  346.         -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  347.         -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  348.         -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  349.         -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  350.         -1, -1, -1, -1, -1, -1, 0, 1, 54, 55,
  351.         56, 57, 58, 59, 60, 61, 62, 63, -1, -1,
  352.         -1, -1, -1, -1, -1, 2, 3, 4, 5, 6,
  353.         7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
  354.         17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27,
  355.         -1, -1, -1, -1, -1, -1, 28, 29, 30,
  356.         31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
  357.         41, 42, 43, 44, 45, 46, 47, 48, 49, 50,
  358.         51, 52, 53, -1, -1, -1, -1, -1
  359.     };
  360.  
  361.     // Expanded Blowfish key
  362.     private int P[];
  363.     private int S[];
  364.  
  365.     /**
  366.      * Encode a byte array using bcrypt's slightly-modified base64 encoding
  367.      * scheme. Note that this is *not* compatible with the standard MIME-base64
  368.      * encoding.
  369.      *
  370.      * @param d the byte array to encode
  371.      * @param len the number of bytes to encode
  372.      * @return base64-encoded string
  373.      * @exception IllegalArgumentException if the length is invalid
  374.      */
  375.     private static String encode_base64(byte d[], int len)
  376.             throws IllegalArgumentException {
  377.         int off = 0;
  378.         StringBuffer rs = new StringBuffer();
  379.         int c1, c2;
  380.  
  381.         if (len <= 0 || len > d.length) {
  382.             throw new IllegalArgumentException("Invalid len");
  383.         }
  384.  
  385.         while (off < len) {
  386.             c1 = d[off++] & 0xff;
  387.             rs.append(base64_code[(c1 >> 2) & 0x3f]);
  388.             c1 = (c1 & 0x03) << 4;
  389.             if (off >= len) {
  390.                 rs.append(base64_code[c1 & 0x3f]);
  391.                 break;
  392.             }
  393.             c2 = d[off++] & 0xff;
  394.             c1 |= (c2 >> 4) & 0x0f;
  395.             rs.append(base64_code[c1 & 0x3f]);
  396.             c1 = (c2 & 0x0f) << 2;
  397.             if (off >= len) {
  398.                 rs.append(base64_code[c1 & 0x3f]);
  399.                 break;
  400.             }
  401.             c2 = d[off++] & 0xff;
  402.             c1 |= (c2 >> 6) & 0x03;
  403.             rs.append(base64_code[c1 & 0x3f]);
  404.             rs.append(base64_code[c2 & 0x3f]);
  405.         }
  406.         return rs.toString();
  407.     }
  408.  
  409.     /**
  410.      * Look up the 3 bits base64-encoded by the specified character,
  411.      * range-checking againt conversion table
  412.      *
  413.      * @param x the base64-encoded value
  414.      * @return the decoded value of x
  415.      */
  416.     private static byte char64(char x) {
  417.         if ((int) x < 0 || (int) x > index_64.length) {
  418.             return -1;
  419.         }
  420.         return index_64[(int) x];
  421.     }
  422.  
  423.     /**
  424.      * Decode a string encoded using bcrypt's base64 scheme to a byte array.
  425.      * Note that this is *not* compatible with the standard MIME-base64
  426.      * encoding.
  427.      *
  428.      * @param s the string to decode
  429.      * @param maxolen the maximum number of bytes to decode
  430.      * @return an array containing the decoded bytes
  431.      * @throws IllegalArgumentException if maxolen is invalid
  432.      */
  433.     private static byte[] decode_base64(String s, int maxolen)
  434.             throws IllegalArgumentException {
  435.         StringBuffer rs = new StringBuffer();
  436.         int off = 0, slen = s.length(), olen = 0;
  437.         byte ret[];
  438.         byte c1, c2, c3, c4, o;
  439.  
  440.         if (maxolen <= 0) {
  441.             throw new IllegalArgumentException("Invalid maxolen");
  442.         }
  443.  
  444.         while (off < slen - 1 && olen < maxolen) {
  445.             c1 = char64(s.charAt(off++));
  446.             c2 = char64(s.charAt(off++));
  447.             if (c1 == -1 || c2 == -1) {
  448.                 break;
  449.             }
  450.             o = (byte) (c1 << 2);
  451.             o |= (c2 & 0x30) >> 4;
  452.             rs.append((char) o);
  453.             if (++olen >= maxolen || off >= slen) {
  454.                 break;
  455.             }
  456.             c3 = char64(s.charAt(off++));
  457.             if (c3 == -1) {
  458.                 break;
  459.             }
  460.             o = (byte) ((c2 & 0x0f) << 4);
  461.             o |= (c3 & 0x3c) >> 2;
  462.             rs.append((char) o);
  463.             if (++olen >= maxolen || off >= slen) {
  464.                 break;
  465.             }
  466.             c4 = char64(s.charAt(off++));
  467.             o = (byte) ((c3 & 0x03) << 6);
  468.             o |= c4;
  469.             rs.append((char) o);
  470.             ++olen;
  471.         }
  472.  
  473.         ret = new byte[olen];
  474.         for (off = 0; off < olen; off++) {
  475.             ret[off] = (byte) rs.charAt(off);
  476.         }
  477.         return ret;
  478.     }
  479.  
  480.     /**
  481.      * Blowfish encipher a single 64-bit block encoded as two 32-bit halves
  482.      *
  483.      * @param lr an array containing the two 32-bit half blocks
  484.      * @param off the position in the array of the blocks
  485.      */
  486.     private final void encipher(int lr[], int off) {
  487.         int i, n, l = lr[off], r = lr[off + 1];
  488.  
  489.         l ^= P[0];
  490.         for (i = 0; i <= BLOWFISH_NUM_ROUNDS - 2;) {
  491.             // Feistel substitution on left word
  492.             n = S[(l >> 24) & 0xff];
  493.             n += S[0x100 | ((l >> 16) & 0xff)];
  494.             n ^= S[0x200 | ((l >> 8) & 0xff)];
  495.             n += S[0x300 | (l & 0xff)];
  496.             r ^= n ^ P[++i];
  497.  
  498.             // Feistel substitution on right word
  499.             n = S[(r >> 24) & 0xff];
  500.             n += S[0x100 | ((r >> 16) & 0xff)];
  501.             n ^= S[0x200 | ((r >> 8) & 0xff)];
  502.             n += S[0x300 | (r & 0xff)];
  503.             l ^= n ^ P[++i];
  504.         }
  505.         lr[off] = r ^ P[BLOWFISH_NUM_ROUNDS + 1];
  506.         lr[off + 1] = l;
  507.     }
  508.  
  509.     /**
  510.      * Cycically extract a word of key material
  511.      *
  512.      * @param data the string to extract the data from
  513.      * @param offp a "pointer" (as a one-entry array) to the current offset into
  514.      * data
  515.      * @return the next word of material from data
  516.      */
  517.     private static int streamtoword(byte data[], int offp[]) {
  518.         int i;
  519.         int word = 0;
  520.         int off = offp[0];
  521.  
  522.         for (i = 0; i < 4; i++) {
  523.             word = (word << 8) | (data[off] & 0xff);
  524.             off = (off + 1) % data.length;
  525.         }
  526.  
  527.         offp[0] = off;
  528.         return word;
  529.     }
  530.  
  531.     /**
  532.      * Initialise the Blowfish key schedule
  533.      */
  534.     private void init_key() {
  535.         P = (int[]) P_orig.clone();
  536.         S = (int[]) S_orig.clone();
  537.     }
  538.  
  539.     /**
  540.      * Key the Blowfish cipher
  541.      *
  542.      * @param key an array containing the key
  543.      */
  544.     private void key(byte key[]) {
  545.         int i;
  546.         int koffp[] = {0};
  547.         int lr[] = {0, 0};
  548.         int plen = P.length, slen = S.length;
  549.  
  550.         for (i = 0; i < plen; i++) {
  551.             P[i] = P[i] ^ streamtoword(key, koffp);
  552.         }
  553.  
  554.         for (i = 0; i < plen; i += 2) {
  555.             encipher(lr, 0);
  556.             P[i] = lr[0];
  557.             P[i + 1] = lr[1];
  558.         }
  559.  
  560.         for (i = 0; i < slen; i += 2) {
  561.             encipher(lr, 0);
  562.             S[i] = lr[0];
  563.             S[i + 1] = lr[1];
  564.         }
  565.     }
  566.  
  567.     /**
  568.      * Perform the "enhanced key schedule" step described by Provos and Mazieres
  569.      * in "A Future-Adaptable Password Scheme"
  570.      * http://www.openbsd.org/papers/bcrypt-paper.ps
  571.      *
  572.      * @param data salt information
  573.      * @param key password information
  574.      */
  575.     private void ekskey(byte data[], byte key[]) {
  576.         int i;
  577.         int koffp[] = {0}, doffp[] = {0};
  578.         int lr[] = {0, 0};
  579.         int plen = P.length, slen = S.length;
  580.  
  581.         for (i = 0; i < plen; i++) {
  582.             P[i] = P[i] ^ streamtoword(key, koffp);
  583.         }
  584.  
  585.         for (i = 0; i < plen; i += 2) {
  586.             lr[0] ^= streamtoword(data, doffp);
  587.             lr[1] ^= streamtoword(data, doffp);
  588.             encipher(lr, 0);
  589.             P[i] = lr[0];
  590.             P[i + 1] = lr[1];
  591.         }
  592.  
  593.         for (i = 0; i < slen; i += 2) {
  594.             lr[0] ^= streamtoword(data, doffp);
  595.             lr[1] ^= streamtoword(data, doffp);
  596.             encipher(lr, 0);
  597.             S[i] = lr[0];
  598.             S[i + 1] = lr[1];
  599.         }
  600.     }
  601.  
  602.     /**
  603.      * Perform the central password hashing step in the bcrypt scheme
  604.      *
  605.      * @param password the password to hash
  606.      * @param salt the binary salt to hash with the password
  607.      * @param log_rounds the binary logarithm of the number of rounds of hashing
  608.      * to apply
  609.      * @return an array containing the binary hashed password
  610.      */
  611.     private byte[] crypt_raw(byte password[], byte salt[], int log_rounds) {
  612.         int rounds, i, j;
  613.         int cdata[] = (int[]) bf_crypt_ciphertext.clone();
  614.         int clen = cdata.length;
  615.         byte ret[];
  616.  
  617.         if (log_rounds < 4 || log_rounds > 31) {
  618.             throw new IllegalArgumentException("Bad number of rounds");
  619.         }
  620.         rounds = 1 << log_rounds;
  621.         if (salt.length != BCRYPT_SALT_LEN) {
  622.             throw new IllegalArgumentException("Bad salt length");
  623.         }
  624.  
  625.         init_key();
  626.         ekskey(salt, password);
  627.         for (i = 0; i != rounds; i++) {
  628.             key(password);
  629.             key(salt);
  630.         }
  631.  
  632.         for (i = 0; i < 64; i++) {
  633.             for (j = 0; j < (clen >> 1); j++) {
  634.                 encipher(cdata, j << 1);
  635.             }
  636.         }
  637.  
  638.         ret = new byte[clen * 4];
  639.         for (i = 0, j = 0; i < clen; i++) {
  640.             ret[j++] = (byte) ((cdata[i] >> 24) & 0xff);
  641.             ret[j++] = (byte) ((cdata[i] >> 16) & 0xff);
  642.             ret[j++] = (byte) ((cdata[i] >> 8) & 0xff);
  643.             ret[j++] = (byte) (cdata[i] & 0xff);
  644.         }
  645.         return ret;
  646.     }
  647.  
  648.     /**
  649.      * Hash a password using the OpenBSD bcrypt scheme
  650.      *
  651.      * @param password the password to hash
  652.      * @param salt the salt to hash with (perhaps generated using
  653.      * BCrypt.gensalt)
  654.      * @return the hashed password
  655.      */
  656.     public static String hashpw(String password, String salt) {
  657.         BCrypt B;
  658.         String real_salt;
  659.         byte passwordb[], saltb[], hashed[];
  660.         char minor = (char) 0;
  661.         int rounds, off = 0;
  662.         StringBuffer rs = new StringBuffer();
  663.  
  664.         if (salt.charAt(0) != '$' || salt.charAt(1) != '2') {
  665.             throw new IllegalArgumentException("Invalid salt version");
  666.         }
  667.         if (salt.charAt(2) == '$') {
  668.             off = 3;
  669.         } else {
  670.             minor = salt.charAt(2);
  671.             if (minor != 'a' || salt.charAt(3) != '$') {
  672.                 throw new IllegalArgumentException("Invalid salt revision");
  673.             }
  674.             off = 4;
  675.         }
  676.  
  677.         // Extract number of rounds
  678.         if (salt.charAt(off + 2) > '$') {
  679.             throw new IllegalArgumentException("Missing salt rounds");
  680.         }
  681.         rounds = Integer.parseInt(salt.substring(off, off + 2));
  682.  
  683.         real_salt = salt.substring(off + 3, off + 25);
  684.         try {
  685.             passwordb = (password + (minor >= 'a' ? "\000" : "")).getBytes("UTF-8");
  686.         } catch (UnsupportedEncodingException uee) {
  687.             throw new AssertionError("UTF-8 is not supported");
  688.         }
  689.  
  690.         saltb = decode_base64(real_salt, BCRYPT_SALT_LEN);
  691.  
  692.         B = new BCrypt();
  693.         hashed = B.crypt_raw(passwordb, saltb, rounds);
  694.  
  695.         rs.append("$2");
  696.         if (minor >= 'a') {
  697.             rs.append(minor);
  698.         }
  699.         rs.append("$");
  700.         if (rounds < 10) {
  701.             rs.append("0");
  702.         }
  703.         if (rounds > 31) {
  704.             throw new IllegalArgumentException(
  705.                     "rounds exceeds maximum (31)");
  706.         }
  707.         rs.append(Integer.toString(rounds));
  708.         rs.append("$");
  709.         rs.append(encode_base64(saltb, saltb.length));
  710.         rs.append(encode_base64(hashed,
  711.                 bf_crypt_ciphertext.length * 4 - 1));
  712.         return rs.toString();
  713.     }
  714.  
  715.     /**
  716.      * Generate a salt for use with the BCrypt.hashpw() method
  717.      *
  718.      * @param log_rounds the log2 of the number of rounds of hashing to apply -
  719.      * the work factor therefore increases as 2**log_rounds.
  720.      * @param random an instance of SecureRandom to use
  721.      * @return an encoded salt value
  722.      */
  723.     public static String gensalt(int log_rounds, SecureRandom random) {
  724.         StringBuffer rs = new StringBuffer();
  725.         byte rnd[] = new byte[BCRYPT_SALT_LEN];
  726.  
  727.         random.nextBytes(rnd);
  728.  
  729.         rs.append("$2a$");
  730.         if (log_rounds < 10) {
  731.             rs.append("0");
  732.         }
  733.         if (log_rounds > 31) {
  734.             throw new IllegalArgumentException(
  735.                     "log_rounds exceeds maximum (31)");
  736.         }
  737.         rs.append(Integer.toString(log_rounds));
  738.         rs.append("$");
  739.         rs.append(encode_base64(rnd, rnd.length));
  740.         return rs.toString();
  741.     }
  742.  
  743.     /**
  744.      * Generate a salt for use with the BCrypt.hashpw() method
  745.      *
  746.      * @param log_rounds the log2 of the number of rounds of hashing to apply -
  747.      * the work factor therefore increases as 2**log_rounds.
  748.      * @return an encoded salt value
  749.      */
  750.     public static String gensalt(int log_rounds) {
  751.         return gensalt(log_rounds, new SecureRandom());
  752.     }
  753.  
  754.     /**
  755.      * Generate a salt for use with the BCrypt.hashpw() method, selecting a
  756.      * reasonable default for the number of hashing rounds to apply
  757.      *
  758.      * @return an encoded salt value
  759.      */
  760.     public static String gensalt() {
  761.         return gensalt(GENSALT_DEFAULT_LOG2_ROUNDS);
  762.     }
  763.  
  764.     /**
  765.      * Check that a plaintext password matches a previously hashed one
  766.      *
  767.      * @param plaintext the plaintext password to verify
  768.      * @param hashed the previously-hashed password
  769.      * @return true if the passwords match, false otherwise
  770.      */
  771.     public static boolean checkpw(String plaintext, String hashed) {
  772.         byte hashed_bytes[];
  773.         byte try_bytes[];
  774.         try {
  775.             String try_pw = hashpw(plaintext, hashed);
  776.             hashed_bytes = hashed.getBytes("UTF-8");
  777.             try_bytes = try_pw.getBytes("UTF-8");
  778.         } catch (UnsupportedEncodingException uee) {
  779.             return false;
  780.         }
  781.         if (hashed_bytes.length != try_bytes.length) {
  782.             return false;
  783.         }
  784.         byte ret = 0;
  785.         for (int i = 0; i < try_bytes.length; i++) {
  786.             ret |= hashed_bytes[i] ^ try_bytes[i];
  787.         }
  788.         return ret == 0;
  789.     }
  790. }
  791. /
  792.  
  793. /* Turn back on substitution strings */
  794. SET DEFINE ON
  795.  
  796. CREATE OR REPLACE PACKAGE bcrypt IS
  797.     FUNCTION encrypt (
  798.         p_string  VARCHAR2,
  799.         p_rounds  NUMBER
  800.     ) RETURN VARCHAR2;
  801.  
  802.     FUNCTION matches (
  803.         p_string   VARCHAR2,
  804.         p_encoded  VARCHAR2
  805.     ) RETURN NUMBER;
  806.  
  807. END bcrypt;
  808. /
  809.  
  810. CREATE OR REPLACE PACKAGE BODY bcrypt IS
  811.     FUNCTION encrypt (
  812.         p_string  VARCHAR2,
  813.         p_rounds  NUMBER
  814.     ) RETURN VARCHAR2 IS
  815.         LANGUAGE JAVA
  816.         NAME 'BCryptPasswordEncoder.encode( java.lang.String, java.lang.Integer ) return java.lang.String';
  817.    
  818.     FUNCTION matches (
  819.         p_string   VARCHAR2,
  820.         p_encoded  VARCHAR2
  821.     ) RETURN NUMBER IS
  822.         LANGUAGE JAVA
  823.         NAME 'BCryptPasswordEncoder.matches( java.lang.String,java.lang.String ) return java.lang.Integer';
  824. END bcrypt;
  825. /
  826.  
  827. /* Test queries */
  828. -- SELECT bcrypt.encrypt('first time 256 conversion', 5) AS result FROM dual;
  829. -- SELECT bcrypt.matches('first time 256 conversion', '$2a$05$PobXd17fYlCdREERq7/0/OsFCTlB3nz5V5IcjPE.6iQlYKRq1DiLe') AS result FROM dual;
  830. -- SELECT bcrypt.matches('first time 256 conversion', '$2a$05$mKUx5e2rpSImZrdqD/Gaq.jTvAIEo2tH.Gf/5N6oJfxsmC4LxRusS') AS result FROM dual;
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