chkpass.c File Reference

#include "postgres.h"
#include <time.h>
#include <unistd.h>
#include "fmgr.h"
#include "utils/builtins.h"

Include dependency graph for chkpass.c:

Go to the source code of this file.

Data Structures
struct	chkpass
Typedefs
typedef struct chkpass	chkpass
Functions
Datum	chkpass_in (PG_FUNCTION_ARGS)
Datum	chkpass_out (PG_FUNCTION_ARGS)
Datum	chkpass_rout (PG_FUNCTION_ARGS)
Datum	chkpass_eq (PG_FUNCTION_ARGS)
Datum	chkpass_ne (PG_FUNCTION_ARGS)
static int	verify_pass (const char *str)
	PG_FUNCTION_INFO_V1 (chkpass_in)
	PG_FUNCTION_INFO_V1 (chkpass_out)
	PG_FUNCTION_INFO_V1 (chkpass_rout)
	PG_FUNCTION_INFO_V1 (chkpass_eq)
	PG_FUNCTION_INFO_V1 (chkpass_ne)
Variables
	PG_MODULE_MAGIC

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Typedef Documentation

typedef struct chkpass chkpass

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Function Documentation

Datum chkpass_eq

(

PG_FUNCTION_ARGS

)

Definition at line 139 of file chkpass.c.

References a1, a2, crypt(), chkpass::password, PG_GETARG_POINTER, PG_GETARG_TEXT_PP, PG_RETURN_BOOL, and text_to_cstring_buffer().

{
    chkpass    *a1 = (chkpass *) PG_GETARG_POINTER(0);
    text       *a2 = PG_GETARG_TEXT_PP(1);
    char        str[9];

    text_to_cstring_buffer(a2, str, sizeof(str));
    PG_RETURN_BOOL(strcmp(a1->password, crypt(str, a1->password)) == 0);
}

Datum chkpass_in

(

PG_FUNCTION_ARGS

)

Definition at line 68 of file chkpass.c.

References crypt(), ereport, errcode(), errmsg(), ERROR, palloc(), chkpass::password, PG_GETARG_CSTRING, PG_RETURN_POINTER, random(), strlcpy(), and verify_pass().

{
    char       *str = PG_GETARG_CSTRING(0);
    chkpass    *result;
    char        mysalt[4];
    static char salt_chars[] =
    "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";

    /* special case to let us enter encrypted passwords */
    if (*str == ':')
    {
        result = (chkpass *) palloc(sizeof(chkpass));
        strlcpy(result->password, str + 1, 13 + 1);
        PG_RETURN_POINTER(result);
    }

    if (verify_pass(str) != 0)
        ereport(ERROR,
                (errcode(ERRCODE_DATA_EXCEPTION),
                 errmsg("password \"%s\" is weak", str)));

    result = (chkpass *) palloc(sizeof(chkpass));

    mysalt[0] = salt_chars[random() & 0x3f];
    mysalt[1] = salt_chars[random() & 0x3f];
    mysalt[2] = 0;              /* technically the terminator is not necessary
                                 * but I like to play safe */
    strcpy(result->password, crypt(str, mysalt));
    PG_RETURN_POINTER(result);
}

Datum chkpass_ne

(

PG_FUNCTION_ARGS

)

Definition at line 151 of file chkpass.c.

References a1, a2, crypt(), chkpass::password, PG_GETARG_POINTER, PG_GETARG_TEXT_PP, PG_RETURN_BOOL, and text_to_cstring_buffer().

{
    chkpass    *a1 = (chkpass *) PG_GETARG_POINTER(0);
    text       *a2 = PG_GETARG_TEXT_PP(1);
    char        str[9];

    text_to_cstring_buffer(a2, str, sizeof(str));
    PG_RETURN_BOOL(strcmp(a1->password, crypt(str, a1->password)) != 0);
}

Datum chkpass_out

(

PG_FUNCTION_ARGS

)

Definition at line 106 of file chkpass.c.

References palloc(), chkpass::password, PG_GETARG_POINTER, and PG_RETURN_CSTRING.

{
    chkpass    *password = (chkpass *) PG_GETARG_POINTER(0);
    char       *result;

    result = (char *) palloc(16);
    result[0] = ':';
    strcpy(result + 1, password->password);

    PG_RETURN_CSTRING(result);
}

Datum chkpass_rout

(

PG_FUNCTION_ARGS

)

Definition at line 125 of file chkpass.c.

References cstring_to_text(), chkpass::password, PG_GETARG_POINTER, and PG_RETURN_TEXT_P.

{
    chkpass    *password = (chkpass *) PG_GETARG_POINTER(0);

    PG_RETURN_TEXT_P(cstring_to_text(password->password));
}

PG_FUNCTION_INFO_V1

(

chkpass_in

)

PG_FUNCTION_INFO_V1

(

chkpass_rout

)

PG_FUNCTION_INFO_V1

(

chkpass_ne

)

PG_FUNCTION_INFO_V1

(

chkpass_eq

)

PG_FUNCTION_INFO_V1

(

chkpass_out

)

static int verify_pass

(

const char *

str

)

[static]

Definition at line 58 of file chkpass.c.

Referenced by chkpass_in().

{
    return 0;
}

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Variable Documentation

PG_MODULE_MAGIC

Definition at line 22 of file chkpass.c.