LCOV - code coverage report
Current view: top level - contrib/pgcrypto - crypt-blowfish.c (source / functions) Hit Total Coverage
Test: PostgreSQL 13beta1 Lines: 157 162 96.9 %
Date: 2020-06-01 09:07:10 Functions: 5 5 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /*
       2             :  * contrib/pgcrypto/crypt-blowfish.c
       3             :  *
       4             :  * This code comes from John the Ripper password cracker, with reentrant
       5             :  * and crypt(3) interfaces added, but optimizations specific to password
       6             :  * cracking removed.
       7             :  *
       8             :  * Written by Solar Designer <solar at openwall.com> in 1998-2002 and
       9             :  * placed in the public domain.
      10             :  *
      11             :  * There's absolutely no warranty.
      12             :  *
      13             :  * It is my intent that you should be able to use this on your system,
      14             :  * as a part of a software package, or anywhere else to improve security,
      15             :  * ensure compatibility, or for any other purpose. I would appreciate
      16             :  * it if you give credit where it is due and keep your modifications in
      17             :  * the public domain as well, but I don't require that in order to let
      18             :  * you place this code and any modifications you make under a license
      19             :  * of your choice.
      20             :  *
      21             :  * This implementation is compatible with OpenBSD bcrypt.c (version 2a)
      22             :  * by Niels Provos <provos at citi.umich.edu>, and uses some of his
      23             :  * ideas.  The password hashing algorithm was designed by David Mazieres
      24             :  * <dm at lcs.mit.edu>.
      25             :  *
      26             :  * There's a paper on the algorithm that explains its design decisions:
      27             :  *
      28             :  *  http://www.usenix.org/events/usenix99/provos.html
      29             :  *
      30             :  * Some of the tricks in BF_ROUND might be inspired by Eric Young's
      31             :  * Blowfish library (I can't be sure if I would think of something if I
      32             :  * hadn't seen his code).
      33             :  */
      34             : 
      35             : #include "postgres.h"
      36             : #include "miscadmin.h"
      37             : 
      38             : #include "px-crypt.h"
      39             : #include "px.h"
      40             : 
      41             : #ifdef __i386__
      42             : #define BF_ASM              0   /* 1 */
      43             : #define BF_SCALE            1
      44             : #elif defined(__x86_64__) || defined(__alpha__) || defined(__hppa__)
      45             : #define BF_ASM              0
      46             : #define BF_SCALE            1
      47             : #else
      48             : #define BF_ASM              0
      49             : #define BF_SCALE            0
      50             : #endif
      51             : 
      52             : typedef unsigned int BF_word;
      53             : typedef signed int BF_word_signed;
      54             : 
      55             : /* Number of Blowfish rounds, this is also hardcoded into a few places */
      56             : #define BF_N                16
      57             : 
      58             : typedef BF_word BF_key[BF_N + 2];
      59             : 
      60             : typedef struct
      61             : {
      62             :     BF_word     S[4][0x100];
      63             :     BF_key      P;
      64             : } BF_ctx;
      65             : 
      66             : /*
      67             :  * Magic IV for 64 Blowfish encryptions that we do at the end.
      68             :  * The string is "OrpheanBeholderScryDoubt" on big-endian.
      69             :  */
      70             : static BF_word BF_magic_w[6] = {
      71             :     0x4F727068, 0x65616E42, 0x65686F6C,
      72             :     0x64657253, 0x63727944, 0x6F756274
      73             : };
      74             : 
      75             : /*
      76             :  * P-box and S-box tables initialized with digits of Pi.
      77             :  */
      78             : static BF_ctx BF_init_state = {
      79             :     {
      80             :         {
      81             :             0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7,
      82             :             0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99,
      83             :             0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16,
      84             :             0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e,
      85             :             0x0d95748f, 0x728eb658, 0x718bcd58, 0x82154aee,
      86             :             0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013,
      87             :             0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef,
      88             :             0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e,
      89             :             0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60,
      90             :             0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440,
      91             :             0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce,
      92             :             0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a,
      93             :             0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e,
      94             :             0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677,
      95             :             0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193,
      96             :             0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032,
      97             :             0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88,
      98             :             0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239,
      99             :             0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e,
     100             :             0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0,
     101             :             0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3,
     102             :             0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98,
     103             :             0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88,
     104             :             0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe,
     105             :             0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6,
     106             :             0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d,
     107             :             0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b,
     108             :             0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7,
     109             :             0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x04c006ba,
     110             :             0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463,
     111             :             0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f,
     112             :             0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09,
     113             :             0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3,
     114             :             0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb,
     115             :             0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279,
     116             :             0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8,
     117             :             0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab,
     118             :             0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82,
     119             :             0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db,
     120             :             0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573,
     121             :             0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0,
     122             :             0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b,
     123             :             0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790,
     124             :             0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8,
     125             :             0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4,
     126             :             0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0,
     127             :             0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7,
     128             :             0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c,
     129             :             0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad,
     130             :             0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1,
     131             :             0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299,
     132             :             0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9,
     133             :             0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477,
     134             :             0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf,
     135             :             0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49,
     136             :             0x00250e2d, 0x2071b35e, 0x226800bb, 0x57b8e0af,
     137             :             0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa,
     138             :             0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5,
     139             :             0x83260376, 0x6295cfa9, 0x11c81968, 0x4e734a41,
     140             :             0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915,
     141             :             0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400,
     142             :             0x08ba6fb5, 0x571be91f, 0xf296ec6b, 0x2a0dd915,
     143             :             0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664,
     144             :             0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a
     145             :         }, {
     146             :             0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623,
     147             :             0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266,
     148             :             0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1,
     149             :             0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e,
     150             :             0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6,
     151             :             0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1,
     152             :             0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x021ecc5e,
     153             :             0x09686b3f, 0x3ebaefc9, 0x3c971814, 0x6b6a70a1,
     154             :             0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737,
     155             :             0x3e07841c, 0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8,
     156             :             0xb03ada37, 0xf0500c0d, 0xf01c1f04, 0x0200b3ff,
     157             :             0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd,
     158             :             0xd19113f9, 0x7ca92ff6, 0x94324773, 0x22f54701,
     159             :             0x3ae5e581, 0x37c2dadc, 0xc8b57634, 0x9af3dda7,
     160             :             0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41,
     161             :             0xe238cd99, 0x3bea0e2f, 0x3280bba1, 0x183eb331,
     162             :             0x4e548b38, 0x4f6db908, 0x6f420d03, 0xf60a04bf,
     163             :             0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af,
     164             :             0xde9a771f, 0xd9930810, 0xb38bae12, 0xdccf3f2e,
     165             :             0x5512721f, 0x2e6b7124, 0x501adde6, 0x9f84cd87,
     166             :             0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c,
     167             :             0xec7aec3a, 0xdb851dfa, 0x63094366, 0xc464c3d2,
     168             :             0xef1c1847, 0x3215d908, 0xdd433b37, 0x24c2ba16,
     169             :             0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd,
     170             :             0x71dff89e, 0x10314e55, 0x81ac77d6, 0x5f11199b,
     171             :             0x043556f1, 0xd7a3c76b, 0x3c11183b, 0x5924a509,
     172             :             0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e,
     173             :             0x86e34570, 0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3,
     174             :             0x771fe71c, 0x4e3d06fa, 0x2965dcb9, 0x99e71d0f,
     175             :             0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a,
     176             :             0xc6150eba, 0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4,
     177             :             0xf2f74ea7, 0x361d2b3d, 0x1939260f, 0x19c27960,
     178             :             0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66,
     179             :             0xe3bc4595, 0xa67bc883, 0xb17f37d1, 0x018cff28,
     180             :             0xc332ddef, 0xbe6c5aa5, 0x65582185, 0x68ab9802,
     181             :             0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84,
     182             :             0x1521b628, 0x29076170, 0xecdd4775, 0x619f1510,
     183             :             0x13cca830, 0xeb61bd96, 0x0334fe1e, 0xaa0363cf,
     184             :             0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14,
     185             :             0xeecc86bc, 0x60622ca7, 0x9cab5cab, 0xb2f3846e,
     186             :             0x648b1eaf, 0x19bdf0ca, 0xa02369b9, 0x655abb50,
     187             :             0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7,
     188             :             0x9b540b19, 0x875fa099, 0x95f7997e, 0x623d7da8,
     189             :             0xf837889a, 0x97e32d77, 0x11ed935f, 0x16681281,
     190             :             0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99,
     191             :             0x57f584a5, 0x1b227263, 0x9b83c3ff, 0x1ac24696,
     192             :             0xcdb30aeb, 0x532e3054, 0x8fd948e4, 0x6dbc3128,
     193             :             0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73,
     194             :             0x5d4a14d9, 0xe864b7e3, 0x42105d14, 0x203e13e0,
     195             :             0x45eee2b6, 0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0,
     196             :             0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105,
     197             :             0xd81e799e, 0x86854dc7, 0xe44b476a, 0x3d816250,
     198             :             0xcf62a1f2, 0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3,
     199             :             0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285,
     200             :             0x095bbf00, 0xad19489d, 0x1462b174, 0x23820e00,
     201             :             0x58428d2a, 0x0c55f5ea, 0x1dadf43e, 0x233f7061,
     202             :             0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb,
     203             :             0x7cde3759, 0xcbee7460, 0x4085f2a7, 0xce77326e,
     204             :             0xa6078084, 0x19f8509e, 0xe8efd855, 0x61d99735,
     205             :             0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc,
     206             :             0x9e447a2e, 0xc3453484, 0xfdd56705, 0x0e1e9ec9,
     207             :             0xdb73dbd3, 0x105588cd, 0x675fda79, 0xe3674340,
     208             :             0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20,
     209             :             0x153e21e7, 0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7
     210             :         }, {
     211             :             0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934,
     212             :             0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068,
     213             :             0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af,
     214             :             0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840,
     215             :             0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45,
     216             :             0xbfbc09ec, 0x03bd9785, 0x7fac6dd0, 0x31cb8504,
     217             :             0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a,
     218             :             0x28507825, 0x530429f4, 0x0a2c86da, 0xe9b66dfb,
     219             :             0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee,
     220             :             0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6,
     221             :             0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42,
     222             :             0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b,
     223             :             0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2,
     224             :             0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb,
     225             :             0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527,
     226             :             0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b,
     227             :             0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33,
     228             :             0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c,
     229             :             0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3,
     230             :             0x95c11548, 0xe4c66d22, 0x48c1133f, 0xc70f86dc,
     231             :             0x07f9c9ee, 0x41041f0f, 0x404779a4, 0x5d886e17,
     232             :             0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564,
     233             :             0x257b7834, 0x602a9c60, 0xdff8e8a3, 0x1f636c1b,
     234             :             0x0e12b4c2, 0x02e1329e, 0xaf664fd1, 0xcad18115,
     235             :             0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922,
     236             :             0x85b2a20e, 0xe6ba0d99, 0xde720c8c, 0x2da2f728,
     237             :             0xd0127845, 0x95b794fd, 0x647d0862, 0xe7ccf5f0,
     238             :             0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e,
     239             :             0x0a476341, 0x992eff74, 0x3a6f6eab, 0xf4f8fd37,
     240             :             0xa812dc60, 0xa1ebddf8, 0x991be14c, 0xdb6e6b0d,
     241             :             0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804,
     242             :             0xf1290dc7, 0xcc00ffa3, 0xb5390f92, 0x690fed0b,
     243             :             0x667b9ffb, 0xcedb7d9c, 0xa091cf0b, 0xd9155ea3,
     244             :             0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb,
     245             :             0x37392eb3, 0xcc115979, 0x8026e297, 0xf42e312d,
     246             :             0x6842ada7, 0xc66a2b3b, 0x12754ccc, 0x782ef11c,
     247             :             0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350,
     248             :             0x1a6b1018, 0x11caedfa, 0x3d25bdd8, 0xe2e1c3c9,
     249             :             0x44421659, 0x0a121386, 0xd90cec6e, 0xd5abea2a,
     250             :             0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe,
     251             :             0x9dbc8057, 0xf0f7c086, 0x60787bf8, 0x6003604d,
     252             :             0xd1fd8346, 0xf6381fb0, 0x7745ae04, 0xd736fccc,
     253             :             0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f,
     254             :             0x77a057be, 0xbde8ae24, 0x55464299, 0xbf582e61,
     255             :             0x4e58f48f, 0xf2ddfda2, 0xf474ef38, 0x8789bdc2,
     256             :             0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9,
     257             :             0x7aeb2661, 0x8b1ddf84, 0x846a0e79, 0x915f95e2,
     258             :             0x466e598e, 0x20b45770, 0x8cd55591, 0xc902de4c,
     259             :             0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e,
     260             :             0xb77f19b6, 0xe0a9dc09, 0x662d09a1, 0xc4324633,
     261             :             0xe85a1f02, 0x09f0be8c, 0x4a99a025, 0x1d6efe10,
     262             :             0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169,
     263             :             0xdcb7da83, 0x573906fe, 0xa1e2ce9b, 0x4fcd7f52,
     264             :             0x50115e01, 0xa70683fa, 0xa002b5c4, 0x0de6d027,
     265             :             0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5,
     266             :             0xf0177a28, 0xc0f586e0, 0x006058aa, 0x30dc7d62,
     267             :             0x11e69ed7, 0x2338ea63, 0x53c2dd94, 0xc2c21634,
     268             :             0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76,
     269             :             0x6f05e409, 0x4b7c0188, 0x39720a3d, 0x7c927c24,
     270             :             0x86e3725f, 0x724d9db9, 0x1ac15bb4, 0xd39eb8fc,
     271             :             0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4,
     272             :             0x1e50ef5e, 0xb161e6f8, 0xa28514d9, 0x6c51133c,
     273             :             0x6fd5c7e7, 0x56e14ec4, 0x362abfce, 0xddc6c837,
     274             :             0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0
     275             :         }, {
     276             :             0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b,
     277             :             0x5cb0679e, 0x4fa33742, 0xd3822740, 0x99bc9bbe,
     278             :             0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b,
     279             :             0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4,
     280             :             0x5748ab2f, 0xbc946e79, 0xc6a376d2, 0x6549c2c8,
     281             :             0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6,
     282             :             0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304,
     283             :             0xa1fad5f0, 0x6a2d519a, 0x63ef8ce2, 0x9a86ee22,
     284             :             0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4,
     285             :             0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6,
     286             :             0x2826a2f9, 0xa73a3ae1, 0x4ba99586, 0xef5562e9,
     287             :             0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59,
     288             :             0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593,
     289             :             0xe990fd5a, 0x9e34d797, 0x2cf0b7d9, 0x022b8b51,
     290             :             0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28,
     291             :             0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c,
     292             :             0xe029ac71, 0xe019a5e6, 0x47b0acfd, 0xed93fa9b,
     293             :             0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28,
     294             :             0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c,
     295             :             0x15056dd4, 0x88f46dba, 0x03a16125, 0x0564f0bd,
     296             :             0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a,
     297             :             0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319,
     298             :             0x7533d928, 0xb155fdf5, 0x03563482, 0x8aba3cbb,
     299             :             0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f,
     300             :             0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991,
     301             :             0xea7a90c2, 0xfb3e7bce, 0x5121ce64, 0x774fbe32,
     302             :             0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680,
     303             :             0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166,
     304             :             0xb39a460a, 0x6445c0dd, 0x586cdecf, 0x1c20c8ae,
     305             :             0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb,
     306             :             0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5,
     307             :             0x72eacea8, 0xfa6484bb, 0x8d6612ae, 0xbf3c6f47,
     308             :             0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370,
     309             :             0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d,
     310             :             0x4040cb08, 0x4eb4e2cc, 0x34d2466a, 0x0115af84,
     311             :             0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048,
     312             :             0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8,
     313             :             0x611560b1, 0xe7933fdc, 0xbb3a792b, 0x344525bd,
     314             :             0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9,
     315             :             0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7,
     316             :             0x1a908749, 0xd44fbd9a, 0xd0dadecb, 0xd50ada38,
     317             :             0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f,
     318             :             0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c,
     319             :             0xbf97222c, 0x15e6fc2a, 0x0f91fc71, 0x9b941525,
     320             :             0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1,
     321             :             0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442,
     322             :             0xe0ec6e0e, 0x1698db3b, 0x4c98a0be, 0x3278e964,
     323             :             0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e,
     324             :             0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8,
     325             :             0xdf359f8d, 0x9b992f2e, 0xe60b6f47, 0x0fe3f11d,
     326             :             0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f,
     327             :             0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299,
     328             :             0xf523f357, 0xa6327623, 0x93a83531, 0x56cccd02,
     329             :             0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc,
     330             :             0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614,
     331             :             0xe6c6c7bd, 0x327a140a, 0x45e1d006, 0xc3f27b9a,
     332             :             0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6,
     333             :             0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b,
     334             :             0x53113ec0, 0x1640e3d3, 0x38abbd60, 0x2547adf0,
     335             :             0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060,
     336             :             0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e,
     337             :             0x1948c25c, 0x02fb8a8c, 0x01c36ae4, 0xd6ebe1f9,
     338             :             0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f,
     339             :             0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6
     340             :         }
     341             :     }, {
     342             :         0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344,
     343             :         0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89,
     344             :         0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c,
     345             :         0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917,
     346             :         0x9216d5d9, 0x8979fb1b
     347             :     }
     348             : };
     349             : 
     350             : static unsigned char BF_itoa64[64 + 1] =
     351             : "./ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
     352             : 
     353             : static unsigned char BF_atoi64[0x60] = {
     354             :     64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 0, 1,
     355             :     54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 64, 64, 64, 64, 64,
     356             :     64, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
     357             :     17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 64, 64, 64, 64, 64,
     358             :     64, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42,
     359             :     43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 64, 64, 64, 64, 64
     360             : };
     361             : 
     362             : #define BF_safe_atoi64(dst, src) \
     363             : do { \
     364             :     tmp = (unsigned char)(src); \
     365             :     if ((unsigned int)(tmp -= 0x20) >= 0x60) return -1; \
     366             :     tmp = BF_atoi64[tmp]; \
     367             :     if (tmp > 63) return -1; \
     368             :     (dst) = tmp; \
     369             : } while (0)
     370             : 
     371             : static int
     372           8 : BF_decode(BF_word *dst, const char *src, int size)
     373             : {
     374           8 :     unsigned char *dptr = (unsigned char *) dst;
     375           8 :     unsigned char *end = dptr + size;
     376           8 :     const unsigned char *sptr = (const unsigned char *) src;
     377             :     unsigned int tmp,
     378             :                 c1,
     379             :                 c2,
     380             :                 c3,
     381             :                 c4;
     382             : 
     383             :     do
     384             :     {
     385          48 :         BF_safe_atoi64(c1, *sptr++);
     386          48 :         BF_safe_atoi64(c2, *sptr++);
     387          48 :         *dptr++ = (c1 << 2) | ((c2 & 0x30) >> 4);
     388          48 :         if (dptr >= end)
     389           8 :             break;
     390             : 
     391          40 :         BF_safe_atoi64(c3, *sptr++);
     392          40 :         *dptr++ = ((c2 & 0x0F) << 4) | ((c3 & 0x3C) >> 2);
     393          40 :         if (dptr >= end)
     394           0 :             break;
     395             : 
     396          40 :         BF_safe_atoi64(c4, *sptr++);
     397          40 :         *dptr++ = ((c3 & 0x03) << 6) | c4;
     398          40 :     } while (dptr < end);
     399             : 
     400           8 :     return 0;
     401             : }
     402             : 
     403             : static void
     404           8 : BF_encode(char *dst, const BF_word *src, int size)
     405             : {
     406           8 :     const unsigned char *sptr = (const unsigned char *) src;
     407           8 :     const unsigned char *end = sptr + size;
     408           8 :     unsigned char *dptr = (unsigned char *) dst;
     409             :     unsigned int c1,
     410             :                 c2;
     411             : 
     412             :     do
     413             :     {
     414          64 :         c1 = *sptr++;
     415          64 :         *dptr++ = BF_itoa64[c1 >> 2];
     416          64 :         c1 = (c1 & 0x03) << 4;
     417          64 :         if (sptr >= end)
     418             :         {
     419           0 :             *dptr++ = BF_itoa64[c1];
     420           0 :             break;
     421             :         }
     422             : 
     423          64 :         c2 = *sptr++;
     424          64 :         c1 |= c2 >> 4;
     425          64 :         *dptr++ = BF_itoa64[c1];
     426          64 :         c1 = (c2 & 0x0f) << 2;
     427          64 :         if (sptr >= end)
     428             :         {
     429           8 :             *dptr++ = BF_itoa64[c1];
     430           8 :             break;
     431             :         }
     432             : 
     433          56 :         c2 = *sptr++;
     434          56 :         c1 |= c2 >> 6;
     435          56 :         *dptr++ = BF_itoa64[c1];
     436          56 :         *dptr++ = BF_itoa64[c2 & 0x3f];
     437          56 :     } while (sptr < end);
     438           8 : }
     439             : 
     440             : static void
     441          80 : BF_swap(BF_word *x, int count)
     442             : {
     443             :     /* Swap on little-endian hardware, else do nothing */
     444             : #ifndef WORDS_BIGENDIAN
     445             :     BF_word     tmp;
     446             : 
     447             :     do
     448             :     {
     449          80 :         tmp = *x;
     450          80 :         tmp = (tmp << 16) | (tmp >> 16);
     451          80 :         *x++ = ((tmp & 0x00FF00FF) << 8) | ((tmp >> 8) & 0x00FF00FF);
     452          80 :     } while (--count);
     453             : #endif
     454          16 : }
     455             : 
     456             : #if BF_SCALE
     457             : /* Architectures which can shift addresses left by 2 bits with no extra cost */
     458             : #define BF_ROUND(L, R, N) \
     459             :     tmp1 = (L) & 0xFF; \
     460             :     tmp2 = (L) >> 8; \
     461             :     tmp2 &= 0xFF; \
     462             :     tmp3 = (L) >> 16; \
     463             :     tmp3 &= 0xFF; \
     464             :     tmp4 = (L) >> 24; \
     465             :     tmp1 = data.ctx.S[3][tmp1]; \
     466             :     tmp2 = data.ctx.S[2][tmp2]; \
     467             :     tmp3 = data.ctx.S[1][tmp3]; \
     468             :     tmp3 += data.ctx.S[0][tmp4]; \
     469             :     tmp3 ^= tmp2; \
     470             :     (R) ^= data.ctx.P[(N) + 1]; \
     471             :     tmp3 += tmp1; \
     472             :     (R) ^= tmp3
     473             : #else
     474             : /* Architectures with no complicated addressing modes supported */
     475             : #define BF_INDEX(S, i) \
     476             :     (*((BF_word *)(((unsigned char *)(S)) + (i))))
     477             : #define BF_ROUND(L, R, N) \
     478             :     tmp1 = (L) & 0xFF; \
     479             :     tmp1 <<= 2; \
     480             :     tmp2 = (L) >> 6; \
     481             :     tmp2 &= 0x3FC; \
     482             :     tmp3 = (L) >> 14; \
     483             :     tmp3 &= 0x3FC; \
     484             :     tmp4 = (L) >> 22; \
     485             :     tmp4 &= 0x3FC; \
     486             :     tmp1 = BF_INDEX(data.ctx.S[3], tmp1); \
     487             :     tmp2 = BF_INDEX(data.ctx.S[2], tmp2); \
     488             :     tmp3 = BF_INDEX(data.ctx.S[1], tmp3); \
     489             :     tmp3 += BF_INDEX(data.ctx.S[0], tmp4); \
     490             :     tmp3 ^= tmp2; \
     491             :     (R) ^= data.ctx.P[(N) + 1]; \
     492             :     tmp3 += tmp1; \
     493             :     (R) ^= tmp3
     494             : #endif
     495             : 
     496             : /*
     497             :  * Encrypt one block, BF_N is hardcoded here.
     498             :  */
     499             : #define BF_ENCRYPT \
     500             :     L ^= data.ctx.P[0]; \
     501             :     BF_ROUND(L, R, 0); \
     502             :     BF_ROUND(R, L, 1); \
     503             :     BF_ROUND(L, R, 2); \
     504             :     BF_ROUND(R, L, 3); \
     505             :     BF_ROUND(L, R, 4); \
     506             :     BF_ROUND(R, L, 5); \
     507             :     BF_ROUND(L, R, 6); \
     508             :     BF_ROUND(R, L, 7); \
     509             :     BF_ROUND(L, R, 8); \
     510             :     BF_ROUND(R, L, 9); \
     511             :     BF_ROUND(L, R, 10); \
     512             :     BF_ROUND(R, L, 11); \
     513             :     BF_ROUND(L, R, 12); \
     514             :     BF_ROUND(R, L, 13); \
     515             :     BF_ROUND(L, R, 14); \
     516             :     BF_ROUND(R, L, 15); \
     517             :     tmp4 = R; \
     518             :     R = L; \
     519             :     L = tmp4 ^ data.ctx.P[BF_N + 1]
     520             : 
     521             : #if BF_ASM
     522             : 
     523             : extern void _BF_body_r(BF_ctx *ctx);
     524             : 
     525             : #define BF_body() \
     526             :     _BF_body_r(&data.ctx)
     527             : #else
     528             : 
     529             : #define BF_body() \
     530             : do { \
     531             :     L = R = 0; \
     532             :     ptr = data.ctx.P; \
     533             :     do { \
     534             :         ptr += 2; \
     535             :         BF_ENCRYPT; \
     536             :         *(ptr - 2) = L; \
     537             :         *(ptr - 1) = R; \
     538             :     } while (ptr < &data.ctx.P[BF_N + 2]); \
     539             : \
     540             :     ptr = data.ctx.S[0]; \
     541             :     do { \
     542             :         ptr += 2; \
     543             :         BF_ENCRYPT; \
     544             :         *(ptr - 2) = L; \
     545             :         *(ptr - 1) = R; \
     546             :     } while (ptr < &data.ctx.S[3][0xFF]); \
     547             : } while (0)
     548             : #endif
     549             : 
     550             : static void
     551           8 : BF_set_key(const char *key, BF_key expanded, BF_key initial,
     552             :            int sign_extension_bug)
     553             : {
     554           8 :     const char *ptr = key;
     555             :     int         i,
     556             :                 j;
     557             :     BF_word     tmp;
     558             : 
     559         152 :     for (i = 0; i < BF_N + 2; i++)
     560             :     {
     561         144 :         tmp = 0;
     562         720 :         for (j = 0; j < 4; j++)
     563             :         {
     564         576 :             tmp <<= 8;
     565         576 :             if (sign_extension_bug)
     566           0 :                 tmp |= (BF_word_signed) (signed char) *ptr;
     567             :             else
     568         576 :                 tmp |= (unsigned char) *ptr;
     569             : 
     570         576 :             if (!*ptr)
     571         204 :                 ptr = key;
     572             :             else
     573         372 :                 ptr++;
     574             :         }
     575             : 
     576         144 :         expanded[i] = tmp;
     577         144 :         initial[i] = BF_init_state.P[i] ^ tmp;
     578             :     }
     579           8 : }
     580             : 
     581             : char *
     582          14 : _crypt_blowfish_rn(const char *key, const char *setting,
     583             :                    char *output, int size)
     584             : {
     585             :     struct
     586             :     {
     587             :         BF_ctx      ctx;
     588             :         BF_key      expanded_key;
     589             :         union
     590             :         {
     591             :             BF_word     salt[4];
     592             :             BF_word     output[6];
     593             :         }           binary;
     594             :     }           data;
     595             :     BF_word     L,
     596             :                 R;
     597             :     BF_word     tmp1,
     598             :                 tmp2,
     599             :                 tmp3,
     600             :                 tmp4;
     601             :     BF_word    *ptr;
     602             :     BF_word     count;
     603             :     int         i;
     604             : 
     605          14 :     if (size < 7 + 22 + 31 + 1)
     606           0 :         return NULL;
     607             : 
     608             :     /*
     609             :      * Blowfish salt value must be formatted as follows: "$2a$" or "$2x$", a
     610             :      * two digit cost parameter, "$", and 22 digits from the alphabet
     611             :      * "./0-9A-Za-z". -- from the PHP crypt docs. Apparently we enforce a few
     612             :      * more restrictions on the count in the salt as well.
     613             :      */
     614          14 :     if (strlen(setting) < 29)
     615           2 :         ereport(ERROR,
     616             :                 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
     617             :                  errmsg("invalid salt")));
     618             : 
     619          12 :     if (setting[0] != '$' ||
     620          12 :         setting[1] != '2' ||
     621          12 :         (setting[2] != 'a' && setting[2] != 'x') ||
     622          12 :         setting[3] != '$' ||
     623          12 :         setting[4] < '0' || setting[4] > '3' ||
     624          10 :         setting[5] < '0' || setting[5] > '9' ||
     625          10 :         (setting[4] == '3' && setting[5] > '1') ||
     626          10 :         setting[6] != '$')
     627             :     {
     628           2 :         ereport(ERROR,
     629             :                 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
     630             :                  errmsg("invalid salt")));
     631             :     }
     632             : 
     633          10 :     count = (BF_word) 1 << ((setting[4] - '0') * 10 + (setting[5] - '0'));
     634          10 :     if (count < 16 || BF_decode(data.binary.salt, &setting[7], 16))
     635             :     {
     636           2 :         px_memset(data.binary.salt, 0, sizeof(data.binary.salt));
     637           2 :         ereport(ERROR,
     638             :                 (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
     639             :                  errmsg("invalid salt")));
     640             :     }
     641           8 :     BF_swap(data.binary.salt, 4);
     642             : 
     643           8 :     BF_set_key(key, data.expanded_key, data.ctx.P, setting[2] == 'x');
     644             : 
     645           8 :     memcpy(data.ctx.S, BF_init_state.S, sizeof(data.ctx.S));
     646             : 
     647           8 :     L = R = 0;
     648          80 :     for (i = 0; i < BF_N + 2; i += 2)
     649             :     {
     650          72 :         L ^= data.binary.salt[i & 2];
     651          72 :         R ^= data.binary.salt[(i & 2) + 1];
     652          72 :         BF_ENCRYPT;
     653          72 :         data.ctx.P[i] = L;
     654          72 :         data.ctx.P[i + 1] = R;
     655             :     }
     656             : 
     657           8 :     ptr = data.ctx.S[0];
     658             :     do
     659             :     {
     660        2048 :         ptr += 4;
     661        2048 :         L ^= data.binary.salt[(BF_N + 2) & 3];
     662        2048 :         R ^= data.binary.salt[(BF_N + 3) & 3];
     663        2048 :         BF_ENCRYPT;
     664        2048 :         *(ptr - 4) = L;
     665        2048 :         *(ptr - 3) = R;
     666             : 
     667        2048 :         L ^= data.binary.salt[(BF_N + 4) & 3];
     668        2048 :         R ^= data.binary.salt[(BF_N + 5) & 3];
     669        2048 :         BF_ENCRYPT;
     670        2048 :         *(ptr - 2) = L;
     671        2048 :         *(ptr - 1) = R;
     672        2048 :     } while (ptr < &data.ctx.S[3][0xFF]);
     673             : 
     674             :     do
     675             :     {
     676        1280 :         CHECK_FOR_INTERRUPTS();
     677             : 
     678        1280 :         data.ctx.P[0] ^= data.expanded_key[0];
     679        1280 :         data.ctx.P[1] ^= data.expanded_key[1];
     680        1280 :         data.ctx.P[2] ^= data.expanded_key[2];
     681        1280 :         data.ctx.P[3] ^= data.expanded_key[3];
     682        1280 :         data.ctx.P[4] ^= data.expanded_key[4];
     683        1280 :         data.ctx.P[5] ^= data.expanded_key[5];
     684        1280 :         data.ctx.P[6] ^= data.expanded_key[6];
     685        1280 :         data.ctx.P[7] ^= data.expanded_key[7];
     686        1280 :         data.ctx.P[8] ^= data.expanded_key[8];
     687        1280 :         data.ctx.P[9] ^= data.expanded_key[9];
     688        1280 :         data.ctx.P[10] ^= data.expanded_key[10];
     689        1280 :         data.ctx.P[11] ^= data.expanded_key[11];
     690        1280 :         data.ctx.P[12] ^= data.expanded_key[12];
     691        1280 :         data.ctx.P[13] ^= data.expanded_key[13];
     692        1280 :         data.ctx.P[14] ^= data.expanded_key[14];
     693        1280 :         data.ctx.P[15] ^= data.expanded_key[15];
     694        1280 :         data.ctx.P[16] ^= data.expanded_key[16];
     695        1280 :         data.ctx.P[17] ^= data.expanded_key[17];
     696             : 
     697      665600 :         BF_body();
     698             : 
     699        1280 :         tmp1 = data.binary.salt[0];
     700        1280 :         tmp2 = data.binary.salt[1];
     701        1280 :         tmp3 = data.binary.salt[2];
     702        1280 :         tmp4 = data.binary.salt[3];
     703        1280 :         data.ctx.P[0] ^= tmp1;
     704        1280 :         data.ctx.P[1] ^= tmp2;
     705        1280 :         data.ctx.P[2] ^= tmp3;
     706        1280 :         data.ctx.P[3] ^= tmp4;
     707        1280 :         data.ctx.P[4] ^= tmp1;
     708        1280 :         data.ctx.P[5] ^= tmp2;
     709        1280 :         data.ctx.P[6] ^= tmp3;
     710        1280 :         data.ctx.P[7] ^= tmp4;
     711        1280 :         data.ctx.P[8] ^= tmp1;
     712        1280 :         data.ctx.P[9] ^= tmp2;
     713        1280 :         data.ctx.P[10] ^= tmp3;
     714        1280 :         data.ctx.P[11] ^= tmp4;
     715        1280 :         data.ctx.P[12] ^= tmp1;
     716        1280 :         data.ctx.P[13] ^= tmp2;
     717        1280 :         data.ctx.P[14] ^= tmp3;
     718        1280 :         data.ctx.P[15] ^= tmp4;
     719        1280 :         data.ctx.P[16] ^= tmp1;
     720        1280 :         data.ctx.P[17] ^= tmp2;
     721             : 
     722      665600 :         BF_body();
     723        1280 :     } while (--count);
     724             : 
     725          32 :     for (i = 0; i < 6; i += 2)
     726             :     {
     727          24 :         L = BF_magic_w[i];
     728          24 :         R = BF_magic_w[i + 1];
     729             : 
     730          24 :         count = 64;
     731             :         do
     732             :         {
     733        1536 :             BF_ENCRYPT;
     734        1536 :         } while (--count);
     735             : 
     736          24 :         data.binary.output[i] = L;
     737          24 :         data.binary.output[i + 1] = R;
     738             :     }
     739             : 
     740           8 :     memcpy(output, setting, 7 + 22 - 1);
     741           8 :     output[7 + 22 - 1] = BF_itoa64[(int)
     742           8 :                                    BF_atoi64[(int) setting[7 + 22 - 1] - 0x20] & 0x30];
     743             : 
     744             : /* This has to be bug-compatible with the original implementation, so
     745             :  * only encode 23 of the 24 bytes. :-) */
     746           8 :     BF_swap(data.binary.output, 6);
     747           8 :     BF_encode(&output[7 + 22], data.binary.output, 23);
     748           8 :     output[7 + 22 + 31] = '\0';
     749             : 
     750             : /* Overwrite the most obvious sensitive data we have on the stack. Note
     751             :  * that this does not guarantee there's no sensitive data left on the
     752             :  * stack and/or in registers; I'm not aware of portable code that does. */
     753           8 :     px_memset(&data, 0, sizeof(data));
     754             : 
     755           8 :     return output;
     756             : }

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