px-crypt.c File Reference

#include "postgres.h"
#include "px.h"
#include "px-crypt.h"

Include dependency graph for px-crypt.c:

Go to the source code of this file.

Data Structures
struct	px_crypt_algo
struct	generator
Functions
static char *	run_crypt_des (const char *psw, const char *salt, char *buf, unsigned len)
static char *	run_crypt_md5 (const char *psw, const char *salt, char *buf, unsigned len)
static char *	run_crypt_bf (const char *psw, const char *salt, char *buf, unsigned len)
char *	px_crypt (const char *psw, const char *salt, char *buf, unsigned len)
int	px_gen_salt (const char *salt_type, char *buf, int rounds)
Variables
static struct px_crypt_algo	px_crypt_list []
static struct generator	gen_list []

---

Function Documentation

char* px_crypt	(	const char *	psw,
		const char *	salt,
		char *	buf,
		unsigned	len
	)

Definition at line 91 of file px-crypt.c.

References px_crypt_algo::crypt, px_crypt_algo::id, px_crypt_algo::id_len, and NULL.

Referenced by pg_crypt().

{
    const struct px_crypt_algo *c;

    for (c = px_crypt_list; c->id; c++)
    {
        if (!c->id_len)
            break;
        if (strncmp(salt, c->id, c->id_len) == 0)
            break;
    }

    if (c->crypt == NULL)
        return NULL;

    return c->crypt(psw, salt, buf, len);
}

int px_gen_salt	(	const char *	salt_type,
		char *	buf,
		int	rounds
	)

Definition at line 133 of file px-crypt.c.

References generator::def_rounds, generator::gen, generator::input_len, generator::max_rounds, generator::min_rounds, generator::name, NULL, pg_strcasecmp(), px_get_pseudo_random_bytes(), and PX_MAX_SALT_LEN.

Referenced by pg_gen_salt(), and pg_gen_salt_rounds().

{
    int         res;
    struct generator *g;
    char       *p;
    char        rbuf[16];

    for (g = gen_list; g->name; g++)
        if (pg_strcasecmp(g->name, salt_type) == 0)
            break;

    if (g->name == NULL)
        return PXE_UNKNOWN_SALT_ALGO;

    if (g->def_rounds)
    {
        if (rounds == 0)
            rounds = g->def_rounds;

        if (rounds < g->min_rounds || rounds > g->max_rounds)
            return PXE_BAD_SALT_ROUNDS;
    }

    res = px_get_pseudo_random_bytes((uint8 *) rbuf, g->input_len);
    if (res < 0)
        return res;

    p = g->gen(rounds, rbuf, g->input_len, buf, PX_MAX_SALT_LEN);
    memset(rbuf, 0, sizeof(rbuf));

    if (p == NULL)
        return PXE_BAD_SALT_ROUNDS;

    return strlen(p);
}

static char* run_crypt_bf	(	const char *	psw,
		const char *	salt,
		char *	buf,
		unsigned	len
	)			[static]

Definition at line 62 of file px-crypt.c.

References _crypt_blowfish_rn().

{
    char       *res;

    res = _crypt_blowfish_rn(psw, salt, buf, len);
    return res;
}

static char* run_crypt_des	(	const char *	psw,
		const char *	salt,
		char *	buf,
		unsigned	len
	)			[static]

Definition at line 39 of file px-crypt.c.

References px_crypt_des().

{
    char       *res;

    res = px_crypt_des(psw, salt);
    if (strlen(res) > len - 1)
        return NULL;
    strcpy(buf, res);
    return buf;
}

static char* run_crypt_md5	(	const char *	psw,
		const char *	salt,
		char *	buf,
		unsigned	len
	)			[static]

Definition at line 52 of file px-crypt.c.

References px_crypt_md5().

{
    char       *res;

    res = px_crypt_md5(psw, salt, buf, len);
    return res;
}

---

Variable Documentation

struct generator gen_list[] [static]

Initial value:

 {
    {"des", _crypt_gensalt_traditional_rn, 2, 0, 0, 0},
    {"md5", _crypt_gensalt_md5_rn, 6, 0, 0, 0},
    {"xdes", _crypt_gensalt_extended_rn, 3, PX_XDES_ROUNDS, 1, 0xFFFFFF},
    {"bf", _crypt_gensalt_blowfish_rn, 16, PX_BF_ROUNDS, 4, 31},
    {NULL, NULL, 0, 0, 0, 0}
}

Definition at line 124 of file px-crypt.c.

struct px_crypt_algo px_crypt_list[] [static]

Initial value:

 {
    {"$2a$", 4, run_crypt_bf},
    {"$2x$", 4, run_crypt_bf},
    {"$2$", 3, NULL},           
    {"$1$", 3, run_crypt_md5},
    {"_", 1, run_crypt_des},
    {"", 0, run_crypt_des},
    {NULL, 0, NULL}
}

Definition at line 80 of file px-crypt.c.