greenplumn saslprep 源码
greenplumn saslprep 代码
文件路径：/src/common/saslprep.c
/*-------------------------------------------------------------------------
* saslprep.c
* SASLprep normalization, for SCRAM authentication
*
* The SASLprep algorithm is used to process a user-supplied password into
* canonical form. For more details, see:
*
* [RFC3454] Preparation of Internationalized Strings ("stringprep"),
* http://www.ietf.org/rfc/rfc3454.txt
*
* [RFC4013] SASLprep: Stringprep Profile for User Names and Passwords
* http://www.ietf.org/rfc/rfc4013.txt
*
*
* Portions Copyright (c) 2017-2019, PostgreSQL Global Development Group
*
* IDENTIFICATION
* src/common/saslprep.c
*
*-------------------------------------------------------------------------
*/
#ifndef FRONTEND
#include "postgres.h"
#else
#include "postgres_fe.h"
#endif
#include "common/saslprep.h"
#include "common/unicode_norm.h"
/*
* Note: The functions in this file depend on functions from
* src/backend/utils/mb/wchar.c, so in order to use this in frontend
* code, you will need to link that in, too.
*/
#include "mb/pg_wchar.h"
/*
* Limit on how large password's we will try to process. A password
* larger than this will be treated the same as out-of-memory.
*/
#define MAX_PASSWORD_LENGTH 1024
/*
* In backend, we will use palloc/pfree. In frontend, use malloc, and
* return SASLPREP_OOM on out-of-memory.
*/
#ifndef FRONTEND
#define STRDUP(s) pstrdup(s)
#define ALLOC(size) palloc(size)
#define FREE(size) pfree(size)
#else
#define STRDUP(s) strdup(s)
#define ALLOC(size) malloc(size)
#define FREE(size) free(size)
#endif
/* Prototypes for local functions */
static int codepoint_range_cmp(const void *a, const void *b);
static bool is_code_in_table(pg_wchar code, const pg_wchar *map, int mapsize);
static int pg_utf8_string_len(const char *source);
static bool pg_is_ascii_string(const char *p);
/*
* Stringprep Mapping Tables.
*
* The stringprep specification includes a number of tables of Unicode
* codepoints, used in different parts of the algorithm. They are below,
* as arrays of codepoint ranges. Each range is a pair of codepoints,
* for the first and last codepoint included the range (inclusive!).
*/
/*
* C.1.2 Non-ASCII space characters
*
* These are all mapped to the ASCII space character (U+00A0).
*/
static const pg_wchar non_ascii_space_ranges[] =
{
0x00A0, 0x00A0,
0x1680, 0x1680,
0x2000, 0x200B,
0x202F, 0x202F,
0x205F, 0x205F,
0x3000, 0x3000
};
/*
* B.1 Commonly mapped to nothing
*
* If any of these appear in the input, they are removed.
*/
static const pg_wchar commonly_mapped_to_nothing_ranges[] =
{
0x00AD, 0x00AD,
0x034F, 0x034F,
0x1806, 0x1806,
0x180B, 0x180D,
0x200B, 0x200D,
0x2060, 0x2060,
0xFE00, 0xFE0F,
0xFEFF, 0xFEFF
};
/*
* prohibited_output_ranges is a union of all the characters from
* the following tables:
*
* C.1.2 Non-ASCII space characters
* C.2.1 ASCII control characters
* C.2.2 Non-ASCII control characters
* C.3 Private Use characters
* C.4 Non-character code points
* C.5 Surrogate code points
* C.6 Inappropriate for plain text characters
* C.7 Inappropriate for canonical representation characters
* C.7 Change display properties or deprecated characters
* C.8 Tagging characters
*
* These are the tables that are listed as "prohibited output"
* characters in the SASLprep profile.
*
* The comment after each code range indicates which source table
* the code came from. Note that there is some overlap in the source
* tables, so one code might originate from multiple source tables.
* Adjacent ranges have also been merged together, to save space.
*/
static const pg_wchar prohibited_output_ranges[] =
{
0x0000, 0x001F, /* C.2.1 */
0x007F, 0x00A0, /* C.1.2, C.2.1, C.2.2 */
0x0340, 0x0341, /* C.8 */
0x06DD, 0x06DD, /* C.2.2 */
0x070F, 0x070F, /* C.2.2 */
0x1680, 0x1680, /* C.1.2 */
0x180E, 0x180E, /* C.2.2 */
0x2000, 0x200F, /* C.1.2, C.2.2, C.8 */
0x2028, 0x202F, /* C.1.2, C.2.2, C.8 */
0x205F, 0x2063, /* C.1.2, C.2.2 */
0x206A, 0x206F, /* C.2.2, C.8 */
0x2FF0, 0x2FFB, /* C.7 */
0x3000, 0x3000, /* C.1.2 */
0xD800, 0xF8FF, /* C.3, C.5 */
0xFDD0, 0xFDEF, /* C.4 */
0xFEFF, 0xFEFF, /* C.2.2 */
0xFFF9, 0xFFFF, /* C.2.2, C.4, C.6 */
0x1D173, 0x1D17A, /* C.2.2 */
0x1FFFE, 0x1FFFF, /* C.4 */
0x2FFFE, 0x2FFFF, /* C.4 */
0x3FFFE, 0x3FFFF, /* C.4 */
0x4FFFE, 0x4FFFF, /* C.4 */
0x5FFFE, 0x5FFFF, /* C.4 */
0x6FFFE, 0x6FFFF, /* C.4 */
0x7FFFE, 0x7FFFF, /* C.4 */
0x8FFFE, 0x8FFFF, /* C.4 */
0x9FFFE, 0x9FFFF, /* C.4 */
0xAFFFE, 0xAFFFF, /* C.4 */
0xBFFFE, 0xBFFFF, /* C.4 */
0xCFFFE, 0xCFFFF, /* C.4 */
0xDFFFE, 0xDFFFF, /* C.4 */
0xE0001, 0xE0001, /* C.9 */
0xE0020, 0xE007F, /* C.9 */
0xEFFFE, 0xEFFFF, /* C.4 */
0xF0000, 0xFFFFF, /* C.3, C.4 */
0x100000, 0x10FFFF /* C.3, C.4 */
};
/* A.1 Unassigned code points in Unicode 3.2 */
static const pg_wchar unassigned_codepoint_ranges[] =
{
0x0221, 0x0221,
0x0234, 0x024F,
0x02AE, 0x02AF,
0x02EF, 0x02FF,
0x0350, 0x035F,
0x0370, 0x0373,
0x0376, 0x0379,
0x037B, 0x037D,
0x037F, 0x0383,
0x038B, 0x038B,
0x038D, 0x038D,
0x03A2, 0x03A2,
0x03CF, 0x03CF,
0x03F7, 0x03FF,
0x0487, 0x0487,
0x04CF, 0x04CF,
0x04F6, 0x04F7,
0x04FA, 0x04FF,
0x0510, 0x0530,
0x0557, 0x0558,
0x0560, 0x0560,
0x0588, 0x0588,
0x058B, 0x0590,
0x05A2, 0x05A2,
0x05BA, 0x05BA,
0x05C5, 0x05CF,
0x05EB, 0x05EF,
0x05F5, 0x060B,
0x060D, 0x061A,
0x061C, 0x061E,
0x0620, 0x0620,
0x063B, 0x063F,
0x0656, 0x065F,
0x06EE, 0x06EF,
0x06FF, 0x06FF,
0x070E, 0x070E,
0x072D, 0x072F,
0x074B, 0x077F,
0x07B2, 0x0900,
0x0904, 0x0904,
0x093A, 0x093B,
0x094E, 0x094F,
0x0955, 0x0957,
0x0971, 0x0980,
0x0984, 0x0984,
0x098D, 0x098E,
0x0991, 0x0992,
0x09A9, 0x09A9,
0x09B1, 0x09B1,
0x09B3, 0x09B5,
0x09BA, 0x09BB,
0x09BD, 0x09BD,
0x09C5, 0x09C6,
0x09C9, 0x09CA,
0x09CE, 0x09D6,
0x09D8, 0x09DB,
0x09DE, 0x09DE,
0x09E4, 0x09E5,
0x09FB, 0x0A01,
0x0A03, 0x0A04,
0x0A0B, 0x0A0E,
0x0A11, 0x0A12,
0x0A29, 0x0A29,
0x0A31, 0x0A31,
0x0A34, 0x0A34,
0x0A37, 0x0A37,
0x0A3A, 0x0A3B,
0x0A3D, 0x0A3D,
0x0A43, 0x0A46,
0x0A49, 0x0A4A,
0x0A4E, 0x0A58,
0x0A5D, 0x0A5D,
0x0A5F, 0x0A65,
0x0A75, 0x0A80,
0x0A84, 0x0A84,
0x0A8C, 0x0A8C,
0x0A8E, 0x0A8E,
0x0A92, 0x0A92,
0x0AA9, 0x0AA9,
0x0AB1, 0x0AB1,
0x0AB4, 0x0AB4,
0x0ABA, 0x0ABB,
0x0AC6, 0x0AC6,
0x0ACA, 0x0ACA,
0x0ACE, 0x0ACF,
0x0AD1, 0x0ADF,
0x0AE1, 0x0AE5,
0x0AF0, 0x0B00,
0x0B04, 0x0B04,
0x0B0D, 0x0B0E,
0x0B11, 0x0B12,
0x0B29, 0x0B29,
0x0B31, 0x0B31,
0x0B34, 0x0B35,
0x0B3A, 0x0B3B,
0x0B44, 0x0B46,
0x0B49, 0x0B4A,
0x0B4E, 0x0B55,
0x0B58, 0x0B5B,
0x0B5E, 0x0B5E,
0x0B62, 0x0B65,
0x0B71, 0x0B81,
0x0B84, 0x0B84,
0x0B8B, 0x0B8D,
0x0B91, 0x0B91,
0x0B96, 0x0B98,
0x0B9B, 0x0B9B,
0x0B9D, 0x0B9D,
0x0BA0, 0x0BA2,
0x0BA5, 0x0BA7,
0x0BAB, 0x0BAD,
0x0BB6, 0x0BB6,
0x0BBA, 0x0BBD,
0x0BC3, 0x0BC5,
0x0BC9, 0x0BC9,
0x0BCE, 0x0BD6,
0x0BD8, 0x0BE6,
0x0BF3, 0x0C00,
0x0C04, 0x0C04,
0x0C0D, 0x0C0D,
0x0C11, 0x0C11,
0x0C29, 0x0C29,
0x0C34, 0x0C34,
0x0C3A, 0x0C3D,
0x0C45, 0x0C45,
0x0C49, 0x0C49,
0x0C4E, 0x0C54,
0x0C57, 0x0C5F,
0x0C62, 0x0C65,
0x0C70, 0x0C81,
0x0C84, 0x0C84,
0x0C8D, 0x0C8D,
0x0C91, 0x0C91,
0x0CA9, 0x0CA9,
0x0CB4, 0x0CB4,
0x0CBA, 0x0CBD,
0x0CC5, 0x0CC5,
0x0CC9, 0x0CC9,
0x0CCE, 0x0CD4,
0x0CD7, 0x0CDD,
0x0CDF, 0x0CDF,
0x0CE2, 0x0CE5,
0x0CF0, 0x0D01,
0x0D04, 0x0D04,
0x0D0D, 0x0D0D,
0x0D11, 0x0D11,
0x0D29, 0x0D29,
0x0D3A, 0x0D3D,
0x0D44, 0x0D45,
0x0D49, 0x0D49,
0x0D4E, 0x0D56,
0x0D58, 0x0D5F,
0x0D62, 0x0D65,
0x0D70, 0x0D81,
0x0D84, 0x0D84,
0x0D97, 0x0D99,
0x0DB2, 0x0DB2,
0x0DBC, 0x0DBC,
0x0DBE, 0x0DBF,
0x0DC7, 0x0DC9,
0x0DCB, 0x0DCE,
0x0DD5, 0x0DD5,
0x0DD7, 0x0DD7,
0x0DE0, 0x0DF1,
0x0DF5, 0x0E00,
0x0E3B, 0x0E3E,
0x0E5C, 0x0E80,
0x0E83, 0x0E83,
0x0E85, 0x0E86,
0x0E89, 0x0E89,
0x0E8B, 0x0E8C,
0x0E8E, 0x0E93,
0x0E98, 0x0E98,
0x0EA0, 0x0EA0,
0x0EA4, 0x0EA4,
0x0EA6, 0x0EA6,
0x0EA8, 0x0EA9,
0x0EAC, 0x0EAC,
0x0EBA, 0x0EBA,
0x0EBE, 0x0EBF,
0x0EC5, 0x0EC5,
0x0EC7, 0x0EC7,
0x0ECE, 0x0ECF,
0x0EDA, 0x0EDB,
0x0EDE, 0x0EFF,
0x0F48, 0x0F48,
0x0F6B, 0x0F70,
0x0F8C, 0x0F8F,
0x0F98, 0x0F98,
0x0FBD, 0x0FBD,
0x0FCD, 0x0FCE,
0x0FD0, 0x0FFF,
0x1022, 0x1022,
0x1028, 0x1028,
0x102B, 0x102B,
0x1033, 0x1035,
0x103A, 0x103F,
0x105A, 0x109F,
0x10C6, 0x10CF,
0x10F9, 0x10FA,
0x10FC, 0x10FF,
0x115A, 0x115E,
0x11A3, 0x11A7,
0x11FA, 0x11FF,
0x1207, 0x1207,
0x1247, 0x1247,
0x1249, 0x1249,
0x124E, 0x124F,
0x1257, 0x1257,
0x1259, 0x1259,
0x125E, 0x125F,
0x1287, 0x1287,
0x1289, 0x1289,
0x128E, 0x128F,
0x12AF, 0x12AF,
0x12B1, 0x12B1,
0x12B6, 0x12B7,
0x12BF, 0x12BF,
0x12C1, 0x12C1,
0x12C6, 0x12C7,
0x12CF, 0x12CF,
0x12D7, 0x12D7,
0x12EF, 0x12EF,
0x130F, 0x130F,
0x1311, 0x1311,
0x1316, 0x1317,
0x131F, 0x131F,
0x1347, 0x1347,
0x135B, 0x1360,
0x137D, 0x139F,
0x13F5, 0x1400,
0x1677, 0x167F,
0x169D, 0x169F,
0x16F1, 0x16FF,
0x170D, 0x170D,
0x1715, 0x171F,
0x1737, 0x173F,
0x1754, 0x175F,
0x176D, 0x176D,
0x1771, 0x1771,
0x1774, 0x177F,
0x17DD, 0x17DF,
0x17EA, 0x17FF,
0x180F, 0x180F,
0x181A, 0x181F,
0x1878, 0x187F,
0x18AA, 0x1DFF,
0x1E9C, 0x1E9F,
0x1EFA, 0x1EFF,
0x1F16, 0x1F17,
0x1F1E, 0x1F1F,
0x1F46, 0x1F47,
0x1F4E, 0x1F4F,
0x1F58, 0x1F58,
0x1F5A, 0x1F5A,
0x1F5C, 0x1F5C,
0x1F5E, 0x1F5E,
0x1F7E, 0x1F7F,
0x1FB5, 0x1FB5,
0x1FC5, 0x1FC5,
0x1FD4, 0x1FD5,
0x1FDC, 0x1FDC,
0x1FF0, 0x1FF1,
0x1FF5, 0x1FF5,
0x1FFF, 0x1FFF,
0x2053, 0x2056,
0x2058, 0x205E,
0x2064, 0x2069,
0x2072, 0x2073,
0x208F, 0x209F,
0x20B2, 0x20CF,
0x20EB, 0x20FF,
0x213B, 0x213C,
0x214C, 0x2152,
0x2184, 0x218F,
0x23CF, 0x23FF,
0x2427, 0x243F,
0x244B, 0x245F,
0x24FF, 0x24FF,
0x2614, 0x2615,
0x2618, 0x2618,
0x267E, 0x267F,
0x268A, 0x2700,
0x2705, 0x2705,
0x270A, 0x270B,
0x2728, 0x2728,
0x274C, 0x274C,
0x274E, 0x274E,
0x2753, 0x2755,
0x2757, 0x2757,
0x275F, 0x2760,
0x2795, 0x2797,
0x27B0, 0x27B0,
0x27BF, 0x27CF,
0x27EC, 0x27EF,
0x2B00, 0x2E7F,
0x2E9A, 0x2E9A,
0x2EF4, 0x2EFF,
0x2FD6, 0x2FEF,
0x2FFC, 0x2FFF,
0x3040, 0x3040,
0x3097, 0x3098,
0x3100, 0x3104,
0x312D, 0x3130,
0x318F, 0x318F,
0x31B8, 0x31EF,
0x321D, 0x321F,
0x3244, 0x3250,
0x327C, 0x327E,
0x32CC, 0x32CF,
0x32FF, 0x32FF,
0x3377, 0x337A,
0x33DE, 0x33DF,
0x33FF, 0x33FF,
0x4DB6, 0x4DFF,
0x9FA6, 0x9FFF,
0xA48D, 0xA48F,
0xA4C7, 0xABFF,
0xD7A4, 0xD7FF,
0xFA2E, 0xFA2F,
0xFA6B, 0xFAFF,
0xFB07, 0xFB12,
0xFB18, 0xFB1C,
0xFB37, 0xFB37,
0xFB3D, 0xFB3D,
0xFB3F, 0xFB3F,
0xFB42, 0xFB42,
0xFB45, 0xFB45,
0xFBB2, 0xFBD2,
0xFD40, 0xFD4F,
0xFD90, 0xFD91,
0xFDC8, 0xFDCF,
0xFDFD, 0xFDFF,
0xFE10, 0xFE1F,
0xFE24, 0xFE2F,
0xFE47, 0xFE48,
0xFE53, 0xFE53,
0xFE67, 0xFE67,
0xFE6C, 0xFE6F,
0xFE75, 0xFE75,
0xFEFD, 0xFEFE,
0xFF00, 0xFF00,
0xFFBF, 0xFFC1,
0xFFC8, 0xFFC9,
0xFFD0, 0xFFD1,
0xFFD8, 0xFFD9,
0xFFDD, 0xFFDF,
0xFFE7, 0xFFE7,
0xFFEF, 0xFFF8,
0x10000, 0x102FF,
0x1031F, 0x1031F,
0x10324, 0x1032F,
0x1034B, 0x103FF,
0x10426, 0x10427,
0x1044E, 0x1CFFF,
0x1D0F6, 0x1D0FF,
0x1D127, 0x1D129,
0x1D1DE, 0x1D3FF,
0x1D455, 0x1D455,
0x1D49D, 0x1D49D,
0x1D4A0, 0x1D4A1,
0x1D4A3, 0x1D4A4,
0x1D4A7, 0x1D4A8,
0x1D4AD, 0x1D4AD,
0x1D4BA, 0x1D4BA,
0x1D4BC, 0x1D4BC,
0x1D4C1, 0x1D4C1,
0x1D4C4, 0x1D4C4,
0x1D506, 0x1D506,
0x1D50B, 0x1D50C,
0x1D515, 0x1D515,
0x1D51D, 0x1D51D,
0x1D53A, 0x1D53A,
0x1D53F, 0x1D53F,
0x1D545, 0x1D545,
0x1D547, 0x1D549,
0x1D551, 0x1D551,
0x1D6A4, 0x1D6A7,
0x1D7CA, 0x1D7CD,
0x1D800, 0x1FFFD,
0x2A6D7, 0x2F7FF,
0x2FA1E, 0x2FFFD,
0x30000, 0x3FFFD,
0x40000, 0x4FFFD,
0x50000, 0x5FFFD,
0x60000, 0x6FFFD,
0x70000, 0x7FFFD,
0x80000, 0x8FFFD,
0x90000, 0x9FFFD,
0xA0000, 0xAFFFD,
0xB0000, 0xBFFFD,
0xC0000, 0xCFFFD,
0xD0000, 0xDFFFD,
0xE0000, 0xE0000,
0xE0002, 0xE001F,
0xE0080, 0xEFFFD
};
/* D.1 Characters with bidirectional property "R" or "AL" */
static const pg_wchar RandALCat_codepoint_ranges[] =
{
0x05BE, 0x05BE,
0x05C0, 0x05C0,
0x05C3, 0x05C3,
0x05D0, 0x05EA,
0x05F0, 0x05F4,
0x061B, 0x061B,
0x061F, 0x061F,
0x0621, 0x063A,
0x0640, 0x064A,
0x066D, 0x066F,
0x0671, 0x06D5,
0x06DD, 0x06DD,
0x06E5, 0x06E6,
0x06FA, 0x06FE,
0x0700, 0x070D,
0x0710, 0x0710,
0x0712, 0x072C,
0x0780, 0x07A5,
0x07B1, 0x07B1,
0x200F, 0x200F,
0xFB1D, 0xFB1D,
0xFB1F, 0xFB28,
0xFB2A, 0xFB36,
0xFB38, 0xFB3C,
0xFB3E, 0xFB3E,
0xFB40, 0xFB41,
0xFB43, 0xFB44,
0xFB46, 0xFBB1,
0xFBD3, 0xFD3D,
0xFD50, 0xFD8F,
0xFD92, 0xFDC7,
0xFDF0, 0xFDFC,
0xFE70, 0xFE74,
0xFE76, 0xFEFC
};
/* D.2 Characters with bidirectional property "L" */
static const pg_wchar LCat_codepoint_ranges[] =
{
0x0041, 0x005A,
0x0061, 0x007A,
0x00AA, 0x00AA,
0x00B5, 0x00B5,
0x00BA, 0x00BA,
0x00C0, 0x00D6,
0x00D8, 0x00F6,
0x00F8, 0x0220,
0x0222, 0x0233,
0x0250, 0x02AD,
0x02B0, 0x02B8,
0x02BB, 0x02C1,
0x02D0, 0x02D1,
0x02E0, 0x02E4,
0x02EE, 0x02EE,
0x037A, 0x037A,
0x0386, 0x0386,
0x0388, 0x038A,
0x038C, 0x038C,
0x038E, 0x03A1,
0x03A3, 0x03CE,
0x03D0, 0x03F5,
0x0400, 0x0482,
0x048A, 0x04CE,
0x04D0, 0x04F5,
0x04F8, 0x04F9,
0x0500, 0x050F,
0x0531, 0x0556,
0x0559, 0x055F,
0x0561, 0x0587,
0x0589, 0x0589,
0x0903, 0x0903,
0x0905, 0x0939,
0x093D, 0x0940,
0x0949, 0x094C,
0x0950, 0x0950,
0x0958, 0x0961,
0x0964, 0x0970,
0x0982, 0x0983,
0x0985, 0x098C,
0x098F, 0x0990,
0x0993, 0x09A8,
0x09AA, 0x09B0,
0x09B2, 0x09B2,
0x09B6, 0x09B9,
0x09BE, 0x09C0,
0x09C7, 0x09C8,
0x09CB, 0x09CC,
0x09D7, 0x09D7,
0x09DC, 0x09DD,
0x09DF, 0x09E1,
0x09E6, 0x09F1,
0x09F4, 0x09FA,
0x0A05, 0x0A0A,
0x0A0F, 0x0A10,
0x0A13, 0x0A28,
0x0A2A, 0x0A30,
0x0A32, 0x0A33,
0x0A35, 0x0A36,
0x0A38, 0x0A39,
0x0A3E, 0x0A40,
0x0A59, 0x0A5C,
0x0A5E, 0x0A5E,
0x0A66, 0x0A6F,
0x0A72, 0x0A74,
0x0A83, 0x0A83,
0x0A85, 0x0A8B,
0x0A8D, 0x0A8D,
0x0A8F, 0x0A91,
0x0A93, 0x0AA8,
0x0AAA, 0x0AB0,
0x0AB2, 0x0AB3,
0x0AB5, 0x0AB9,
0x0ABD, 0x0AC0,
0x0AC9, 0x0AC9,
0x0ACB, 0x0ACC,
0x0AD0, 0x0AD0,
0x0AE0, 0x0AE0,
0x0AE6, 0x0AEF,
0x0B02, 0x0B03,
0x0B05, 0x0B0C,
0x0B0F, 0x0B10,
0x0B13, 0x0B28,
0x0B2A, 0x0B30,
0x0B32, 0x0B33,
0x0B36, 0x0B39,
0x0B3D, 0x0B3E,
0x0B40, 0x0B40,
0x0B47, 0x0B48,
0x0B4B, 0x0B4C,
0x0B57, 0x0B57,
0x0B5C, 0x0B5D,
0x0B5F, 0x0B61,
0x0B66, 0x0B70,
0x0B83, 0x0B83,
0x0B85, 0x0B8A,
0x0B8E, 0x0B90,
0x0B92, 0x0B95,
0x0B99, 0x0B9A,
0x0B9C, 0x0B9C,
0x0B9E, 0x0B9F,
0x0BA3, 0x0BA4,
0x0BA8, 0x0BAA,
0x0BAE, 0x0BB5,
0x0BB7, 0x0BB9,
0x0BBE, 0x0BBF,
0x0BC1, 0x0BC2,
0x0BC6, 0x0BC8,
0x0BCA, 0x0BCC,
0x0BD7, 0x0BD7,
0x0BE7, 0x0BF2,
0x0C01, 0x0C03,
0x0C05, 0x0C0C,
0x0C0E, 0x0C10,
0x0C12, 0x0C28,
0x0C2A, 0x0C33,
0x0C35, 0x0C39,
0x0C41, 0x0C44,
0x0C60, 0x0C61,
0x0C66, 0x0C6F,
0x0C82, 0x0C83,
0x0C85, 0x0C8C,
0x0C8E, 0x0C90,
0x0C92, 0x0CA8,
0x0CAA, 0x0CB3,
0x0CB5, 0x0CB9,
0x0CBE, 0x0CBE,
0x0CC0, 0x0CC4,
0x0CC7, 0x0CC8,
0x0CCA, 0x0CCB,
0x0CD5, 0x0CD6,
0x0CDE, 0x0CDE,
0x0CE0, 0x0CE1,
0x0CE6, 0x0CEF,
0x0D02, 0x0D03,
0x0D05, 0x0D0C,
0x0D0E, 0x0D10,
0x0D12, 0x0D28,
0x0D2A, 0x0D39,
0x0D3E, 0x0D40,
0x0D46, 0x0D48,
0x0D4A, 0x0D4C,
0x0D57, 0x0D57,
0x0D60, 0x0D61,
0x0D66, 0x0D6F,
0x0D82, 0x0D83,
0x0D85, 0x0D96,
0x0D9A, 0x0DB1,
0x0DB3, 0x0DBB,
0x0DBD, 0x0DBD,
0x0DC0, 0x0DC6,
0x0DCF, 0x0DD1,
0x0DD8, 0x0DDF,
0x0DF2, 0x0DF4,
0x0E01, 0x0E30,
0x0E32, 0x0E33,
0x0E40, 0x0E46,
0x0E4F, 0x0E5B,
0x0E81, 0x0E82,
0x0E84, 0x0E84,
0x0E87, 0x0E88,
0x0E8A, 0x0E8A,
0x0E8D, 0x0E8D,
0x0E94, 0x0E97,
0x0E99, 0x0E9F,
0x0EA1, 0x0EA3,
0x0EA5, 0x0EA5,
0x0EA7, 0x0EA7,
0x0EAA, 0x0EAB,
0x0EAD, 0x0EB0,
0x0EB2, 0x0EB3,
0x0EBD, 0x0EBD,
0x0EC0, 0x0EC4,
0x0EC6, 0x0EC6,
0x0ED0, 0x0ED9,
0x0EDC, 0x0EDD,
0x0F00, 0x0F17,
0x0F1A, 0x0F34,
0x0F36, 0x0F36,
0x0F38, 0x0F38,
0x0F3E, 0x0F47,
0x0F49, 0x0F6A,
0x0F7F, 0x0F7F,
0x0F85, 0x0F85,
0x0F88, 0x0F8B,
0x0FBE, 0x0FC5,
0x0FC7, 0x0FCC,
0x0FCF, 0x0FCF,
0x1000, 0x1021,
0x1023, 0x1027,
0x1029, 0x102A,
0x102C, 0x102C,
0x1031, 0x1031,
0x1038, 0x1038,
0x1040, 0x1057,
0x10A0, 0x10C5,
0x10D0, 0x10F8,
0x10FB, 0x10FB,
0x1100, 0x1159,
0x115F, 0x11A2,
0x11A8, 0x11F9,
0x1200, 0x1206,
0x1208, 0x1246,
0x1248, 0x1248,
0x124A, 0x124D,
0x1250, 0x1256,
0x1258, 0x1258,
0x125A, 0x125D,
0x1260, 0x1286,
0x1288, 0x1288,
0x128A, 0x128D,
0x1290, 0x12AE,
0x12B0, 0x12B0,
0x12B2, 0x12B5,
0x12B8, 0x12BE,
0x12C0, 0x12C0,
0x12C2, 0x12C5,
0x12C8, 0x12CE,
0x12D0, 0x12D6,
0x12D8, 0x12EE,
0x12F0, 0x130E,
0x1310, 0x1310,
0x1312, 0x1315,
0x1318, 0x131E,
0x1320, 0x1346,
0x1348, 0x135A,
0x1361, 0x137C,
0x13A0, 0x13F4,
0x1401, 0x1676,
0x1681, 0x169A,
0x16A0, 0x16F0,
0x1700, 0x170C,
0x170E, 0x1711,
0x1720, 0x1731,
0x1735, 0x1736,
0x1740, 0x1751,
0x1760, 0x176C,
0x176E, 0x1770,
0x1780, 0x17B6,
0x17BE, 0x17C5,
0x17C7, 0x17C8,
0x17D4, 0x17DA,
0x17DC, 0x17DC,
0x17E0, 0x17E9,
0x1810, 0x1819,
0x1820, 0x1877,
0x1880, 0x18A8,
0x1E00, 0x1E9B,
0x1EA0, 0x1EF9,
0x1F00, 0x1F15,
0x1F18, 0x1F1D,
0x1F20, 0x1F45,
0x1F48, 0x1F4D,
0x1F50, 0x1F57,
0x1F59, 0x1F59,
0x1F5B, 0x1F5B,
0x1F5D, 0x1F5D,
0x1F5F, 0x1F7D,
0x1F80, 0x1FB4,
0x1FB6, 0x1FBC,
0x1FBE, 0x1FBE,
0x1FC2, 0x1FC4,
0x1FC6, 0x1FCC,
0x1FD0, 0x1FD3,
0x1FD6, 0x1FDB,
0x1FE0, 0x1FEC,
0x1FF2, 0x1FF4,
0x1FF6, 0x1FFC,
0x200E, 0x200E,
0x2071, 0x2071,
0x207F, 0x207F,
0x2102, 0x2102,
0x2107, 0x2107,
0x210A, 0x2113,
0x2115, 0x2115,
0x2119, 0x211D,
0x2124, 0x2124,
0x2126, 0x2126,
0x2128, 0x2128,
0x212A, 0x212D,
0x212F, 0x2131,
0x2133, 0x2139,
0x213D, 0x213F,
0x2145, 0x2149,
0x2160, 0x2183,
0x2336, 0x237A,
0x2395, 0x2395,
0x249C, 0x24E9,
0x3005, 0x3007,
0x3021, 0x3029,
0x3031, 0x3035,
0x3038, 0x303C,
0x3041, 0x3096,
0x309D, 0x309F,
0x30A1, 0x30FA,
0x30FC, 0x30FF,
0x3105, 0x312C,
0x3131, 0x318E,
0x3190, 0x31B7,
0x31F0, 0x321C,
0x3220, 0x3243,
0x3260, 0x327B,
0x327F, 0x32B0,
0x32C0, 0x32CB,
0x32D0, 0x32FE,
0x3300, 0x3376,
0x337B, 0x33DD,
0x33E0, 0x33FE,
0x3400, 0x4DB5,
0x4E00, 0x9FA5,
0xA000, 0xA48C,
0xAC00, 0xD7A3,
0xD800, 0xFA2D,
0xFA30, 0xFA6A,
0xFB00, 0xFB06,
0xFB13, 0xFB17,
0xFF21, 0xFF3A,
0xFF41, 0xFF5A,
0xFF66, 0xFFBE,
0xFFC2, 0xFFC7,
0xFFCA, 0xFFCF,
0xFFD2, 0xFFD7,
0xFFDA, 0xFFDC,
0x10300, 0x1031E,
0x10320, 0x10323,
0x10330, 0x1034A,
0x10400, 0x10425,
0x10428, 0x1044D,
0x1D000, 0x1D0F5,
0x1D100, 0x1D126,
0x1D12A, 0x1D166,
0x1D16A, 0x1D172,
0x1D183, 0x1D184,
0x1D18C, 0x1D1A9,
0x1D1AE, 0x1D1DD,
0x1D400, 0x1D454,
0x1D456, 0x1D49C,
0x1D49E, 0x1D49F,
0x1D4A2, 0x1D4A2,
0x1D4A5, 0x1D4A6,
0x1D4A9, 0x1D4AC,
0x1D4AE, 0x1D4B9,
0x1D4BB, 0x1D4BB,
0x1D4BD, 0x1D4C0,
0x1D4C2, 0x1D4C3,
0x1D4C5, 0x1D505,
0x1D507, 0x1D50A,
0x1D50D, 0x1D514,
0x1D516, 0x1D51C,
0x1D51E, 0x1D539,
0x1D53B, 0x1D53E,
0x1D540, 0x1D544,
0x1D546, 0x1D546,
0x1D54A, 0x1D550,
0x1D552, 0x1D6A3,
0x1D6A8, 0x1D7C9,
0x20000, 0x2A6D6,
0x2F800, 0x2FA1D,
0xF0000, 0xFFFFD,
0x100000, 0x10FFFD
};
/* End of stringprep tables */
/* Is the given Unicode codepoint in the given table of ranges? */
#define IS_CODE_IN_TABLE(code, map) is_code_in_table(code, map, lengthof(map))
static int
codepoint_range_cmp(const void *a, const void *b)
{
const pg_wchar *key = (const pg_wchar *) a;
const pg_wchar *range = (const pg_wchar *) b;
if (*key < range[0])
return -1; /* less than lower bound */
if (*key > range[1])
return 1; /* greater than upper bound */
return 0; /* within range */
}
static bool
is_code_in_table(pg_wchar code, const pg_wchar *map, int mapsize)
{
Assert(mapsize % 2 == 0);
if (code < map[0] || code > map[mapsize - 1])
return false;
if (bsearch(&code, map, mapsize / 2, sizeof(pg_wchar) * 2,
codepoint_range_cmp))
return true;
else
return false;
}
/*
* Calculate the length in characters of a null-terminated UTF-8 string.
*
* Returns -1 if the input is not valid UTF-8.
*/
static int
pg_utf8_string_len(const char *source)
{
const unsigned char *p = (const unsigned char *) source;
int l;
int num_chars = 0;
while (*p)
{
l = pg_utf_mblen(p);
if (!pg_utf8_islegal(p, l))
return -1;
p += l;
num_chars++;
}
return num_chars;
}
/*
* Returns true if the input string is pure ASCII.
*/
static bool
pg_is_ascii_string(const char *p)
{
while (*p)
{
if (IS_HIGHBIT_SET(*p))
return false;
p++;
}
return true;
}
/*
* pg_saslprep - Normalize a password with SASLprep.
*
* SASLprep requires the input to be in UTF-8 encoding, but PostgreSQL
* supports many encodings, so we don't blindly assume that. pg_saslprep
* will check if the input looks like valid UTF-8, and returns
* SASLPREP_INVALID_UTF8 if not.
*
* If the string contains prohibited characters (or more precisely, if the
* output string would contain prohibited characters after normalization),
* returns SASLPREP_PROHIBITED.
*
* On success, returns SASLPREP_SUCCESS, and the normalized string in
* *output.
*
* In frontend, the normalized string is malloc'd, and the caller is
* responsible for freeing it. If an allocation fails, returns
* SASLPREP_OOM. In backend, the normalized string is palloc'd instead,
* and a failed allocation leads to ereport(ERROR).
*/
pg_saslprep_rc
pg_saslprep(const char *input, char **output)
{
pg_wchar *input_chars = NULL;
pg_wchar *output_chars = NULL;
int input_size;
char *result;
int result_size;
int count;
int i;
bool contains_RandALCat;
unsigned char *p;
pg_wchar *wp;
/* Ensure we return *output as NULL on failure */
*output = NULL;
/* Check that the password isn't stupendously long */
if (strlen(input) > MAX_PASSWORD_LENGTH)
{
#ifndef FRONTEND
ereport(ERROR,
(errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
errmsg("password too long")));
#else
return SASLPREP_OOM;
#endif
}
/*
* Quick check if the input is pure ASCII. An ASCII string requires no
* further processing.
*/
if (pg_is_ascii_string(input))
{
*output = STRDUP(input);
if (!(*output))
goto oom;
return SASLPREP_SUCCESS;
}
/*
* Convert the input from UTF-8 to an array of Unicode codepoints.
*
* This also checks that the input is a legal UTF-8 string.
*/
input_size = pg_utf8_string_len(input);
if (input_size < 0)
return SASLPREP_INVALID_UTF8;
input_chars = ALLOC((input_size + 1) * sizeof(pg_wchar));
if (!input_chars)
goto oom;
p = (unsigned char *) input;
for (i = 0; i < input_size; i++)
{
input_chars[i] = utf8_to_unicode(p);
p += pg_utf_mblen(p);
}
input_chars[i] = (pg_wchar) '\0';
/*
* The steps below correspond to the steps listed in [RFC3454], Section
* "2. Preparation Overview"
*/
/*
* 1) Map -- For each character in the input, check if it has a mapping
* and, if so, replace it with its mapping.
*/
count = 0;
for (i = 0; i < input_size; i++)
{
pg_wchar code = input_chars[i];
if (IS_CODE_IN_TABLE(code, non_ascii_space_ranges))
input_chars[count++] = 0x0020;
else if (IS_CODE_IN_TABLE(code, commonly_mapped_to_nothing_ranges))
{
/* map to nothing */
}
else
input_chars[count++] = code;
}
input_chars[count] = (pg_wchar) '\0';
input_size = count;
if (input_size == 0)
goto prohibited; /* don't allow empty password */
/*
* 2) Normalize -- Normalize the result of step 1 using Unicode
* normalization.
*/
output_chars = unicode_normalize_kc(input_chars);
if (!output_chars)
goto oom;
/*
* 3) Prohibit -- Check for any characters that are not allowed in the
* output. If any are found, return an error.
*/
for (i = 0; i < input_size; i++)
{
pg_wchar code = input_chars[i];
if (IS_CODE_IN_TABLE(code, prohibited_output_ranges))
goto prohibited;
if (IS_CODE_IN_TABLE(code, unassigned_codepoint_ranges))
goto prohibited;
}
/*
* 4) Check bidi -- Possibly check for right-to-left characters, and if
* any are found, make sure that the whole string satisfies the
* requirements for bidirectional strings. If the string does not satisfy
* the requirements for bidirectional strings, return an error.
*
* [RFC3454], Section "6. Bidirectional Characters" explains in more
* detail what that means:
*
* "In any profile that specifies bidirectional character handling, all
* three of the following requirements MUST be met:
*
* 1) The characters in section 5.8 MUST be prohibited.
*
* 2) If a string contains any RandALCat character, the string MUST NOT
* contain any LCat character.
*
* 3) If a string contains any RandALCat character, a RandALCat character
* MUST be the first character of the string, and a RandALCat character
* MUST be the last character of the string."
*/
contains_RandALCat = false;
for (i = 0; i < input_size; i++)
{
pg_wchar code = input_chars[i];
if (IS_CODE_IN_TABLE(code, RandALCat_codepoint_ranges))
{
contains_RandALCat = true;
break;
}
}
if (contains_RandALCat)
{
pg_wchar first = input_chars[0];
pg_wchar last = input_chars[input_size - 1];
for (i = 0; i < input_size; i++)
{
pg_wchar code = input_chars[i];
if (IS_CODE_IN_TABLE(code, LCat_codepoint_ranges))
goto prohibited;
}
if (!IS_CODE_IN_TABLE(first, RandALCat_codepoint_ranges) ||
!IS_CODE_IN_TABLE(last, RandALCat_codepoint_ranges))
goto prohibited;
}
/*
* Finally, convert the result back to UTF-8.
*/
result_size = 0;
for (wp = output_chars; *wp; wp++)
{
unsigned char buf[4];
unicode_to_utf8(*wp, buf);
result_size += pg_utf_mblen(buf);
}
result = ALLOC(result_size + 1);
if (!result)
goto oom;
/*
* There are no error exits below here, so the error exit paths don't need
* to worry about possibly freeing "result".
*/
p = (unsigned char *) result;
for (wp = output_chars; *wp; wp++)
{
unicode_to_utf8(*wp, p);
p += pg_utf_mblen(p);
}
Assert((char *) p == result + result_size);
*p = '\0';
FREE(input_chars);
FREE(output_chars);
*output = result;
return SASLPREP_SUCCESS;
prohibited:
if (input_chars)
FREE(input_chars);
if (output_chars)
FREE(output_chars);
return SASLPREP_PROHIBITED;
oom:
if (input_chars)
FREE(input_chars);
if (output_chars)
FREE(output_chars);
return SASLPREP_OOM;
}
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