496 lines
12 KiB
C
496 lines
12 KiB
C
/* apps/passwd.c */
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#if defined NO_MD5 || defined CHARSET_EBCDIC
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# define NO_MD5CRYPT_1
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#endif
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#if !defined(NO_DES) || !defined(NO_MD5CRYPT_1)
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#include <assert.h>
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#include <string.h>
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#include "apps.h"
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#include <openssl/bio.h>
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#include <openssl/err.h>
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#include <openssl/evp.h>
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#include <openssl/rand.h>
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#ifndef NO_DES
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# include <openssl/des.h>
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#endif
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#ifndef NO_MD5CRYPT_1
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# include <openssl/md5.h>
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#endif
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#undef PROG
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#define PROG passwd_main
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static unsigned const char cov_2char[64]={
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/* from crypto/des/fcrypt.c */
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0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35,
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0x36,0x37,0x38,0x39,0x41,0x42,0x43,0x44,
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0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,
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0x4D,0x4E,0x4F,0x50,0x51,0x52,0x53,0x54,
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0x55,0x56,0x57,0x58,0x59,0x5A,0x61,0x62,
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0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,
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0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,
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0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A
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};
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static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
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char *passwd, BIO *out, int quiet, int table, int reverse,
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size_t pw_maxlen, int usecrypt, int use1, int useapr1);
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/* -crypt - standard Unix password algorithm (default, only choice)
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* -1 - MD5-based password algorithm
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* -apr1 - MD5-based password algorithm, Apache variant
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* -salt string - salt
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* -in file - read passwords from file
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* -stdin - read passwords from stdin
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* -quiet - no warnings
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* -table - format output as table
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* -reverse - switch table columns
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*/
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int MAIN(int, char **);
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int MAIN(int argc, char **argv)
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{
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int ret = 1;
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char *infile = NULL;
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int in_stdin = 0;
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char *salt = NULL, *passwd = NULL, **passwds = NULL;
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char *salt_malloc = NULL, *passwd_malloc = NULL;
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size_t passwd_malloc_size = 0;
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int pw_source_defined = 0;
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BIO *in = NULL, *out = NULL;
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int i, badopt, opt_done;
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int passed_salt = 0, quiet = 0, table = 0, reverse = 0;
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int usecrypt = 0, use1 = 0, useapr1 = 0;
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size_t pw_maxlen = 0;
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apps_startup();
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if (bio_err == NULL)
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if ((bio_err=BIO_new(BIO_s_file())) != NULL)
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BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
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out = BIO_new(BIO_s_file());
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if (out == NULL)
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goto err;
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BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);
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badopt = 0, opt_done = 0;
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i = 0;
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while (!badopt && !opt_done && argv[++i] != NULL)
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{
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if (strcmp(argv[i], "-crypt") == 0)
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usecrypt = 1;
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else if (strcmp(argv[i], "-1") == 0)
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use1 = 1;
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else if (strcmp(argv[i], "-apr1") == 0)
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useapr1 = 1;
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else if (strcmp(argv[i], "-salt") == 0)
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{
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if ((argv[i+1] != NULL) && (salt == NULL))
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{
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passed_salt = 1;
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salt = argv[++i];
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}
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else
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badopt = 1;
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}
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else if (strcmp(argv[i], "-in") == 0)
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{
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if ((argv[i+1] != NULL) && !pw_source_defined)
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{
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pw_source_defined = 1;
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infile = argv[++i];
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}
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else
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badopt = 1;
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}
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else if (strcmp(argv[i], "-stdin") == 0)
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{
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if (!pw_source_defined)
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{
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pw_source_defined = 1;
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in_stdin = 1;
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}
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else
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badopt = 1;
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}
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else if (strcmp(argv[i], "-quiet") == 0)
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quiet = 1;
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else if (strcmp(argv[i], "-table") == 0)
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table = 1;
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else if (strcmp(argv[i], "-reverse") == 0)
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reverse = 1;
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else if (argv[i][0] == '-')
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badopt = 1;
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else if (!pw_source_defined)
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/* non-option arguments, use as passwords */
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{
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pw_source_defined = 1;
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passwds = &argv[i];
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opt_done = 1;
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}
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else
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badopt = 1;
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}
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if (!usecrypt && !use1 && !useapr1) /* use default */
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usecrypt = 1;
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if (usecrypt + use1 + useapr1 > 1) /* conflict */
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badopt = 1;
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/* reject unsupported algorithms */
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#ifdef NO_DES
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if (usecrypt) badopt = 1;
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#endif
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#ifdef NO_MD5CRYPT_1
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if (use1 || useapr1) badopt = 1;
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#endif
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if (badopt)
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{
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BIO_printf(bio_err, "Usage: passwd [options] [passwords]\n");
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BIO_printf(bio_err, "where options are\n");
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#ifndef NO_DES
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BIO_printf(bio_err, "-crypt standard Unix password algorithm (default)\n");
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#endif
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#ifndef NO_MD5CRYPT_1
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BIO_printf(bio_err, "-1 MD5-based password algorithm\n");
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BIO_printf(bio_err, "-apr1 MD5-based password algorithm, Apache variant\n");
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#endif
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BIO_printf(bio_err, "-salt string use provided salt\n");
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BIO_printf(bio_err, "-in file read passwords from file\n");
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BIO_printf(bio_err, "-stdin read passwords from stdin\n");
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BIO_printf(bio_err, "-quiet no warnings\n");
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BIO_printf(bio_err, "-table format output as table\n");
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BIO_printf(bio_err, "-reverse switch table columns\n");
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goto err;
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}
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if ((infile != NULL) || in_stdin)
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{
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in = BIO_new(BIO_s_file());
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if (in == NULL)
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goto err;
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if (infile != NULL)
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{
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assert(in_stdin == 0);
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if (BIO_read_filename(in, infile) <= 0)
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goto err;
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}
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else
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{
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assert(in_stdin);
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BIO_set_fp(in, stdin, BIO_NOCLOSE);
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}
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}
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if (usecrypt)
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pw_maxlen = 8;
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else if (use1 || useapr1)
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pw_maxlen = 256; /* arbitrary limit, should be enough for most passwords */
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if (passwds == NULL)
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{
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/* no passwords on the command line */
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passwd_malloc_size = pw_maxlen + 2;
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/* longer than necessary so that we can warn about truncation */
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passwd = passwd_malloc = OPENSSL_malloc(passwd_malloc_size);
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if (passwd_malloc == NULL)
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goto err;
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}
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if ((in == NULL) && (passwds == NULL))
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{
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/* build a null-terminated list */
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static char *passwds_static[2] = {NULL, NULL};
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passwds = passwds_static;
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if (in == NULL)
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if (EVP_read_pw_string(passwd_malloc, passwd_malloc_size, "Password: ", 0) != 0)
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goto err;
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passwds[0] = passwd_malloc;
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}
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if (in == NULL)
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{
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assert(passwds != NULL);
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assert(*passwds != NULL);
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do /* loop over list of passwords */
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{
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passwd = *passwds++;
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if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, out,
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quiet, table, reverse, pw_maxlen, usecrypt, use1, useapr1))
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goto err;
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}
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while (*passwds != NULL);
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}
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else
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/* in != NULL */
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{
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int done;
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assert (passwd != NULL);
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do
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{
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int r = BIO_gets(in, passwd, pw_maxlen + 1);
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if (r > 0)
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{
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char *c = (strchr(passwd, '\n')) ;
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if (c != NULL)
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*c = 0; /* truncate at newline */
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else
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{
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/* ignore rest of line */
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char trash[BUFSIZ];
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do
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r = BIO_gets(in, trash, sizeof trash);
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while ((r > 0) && (!strchr(trash, '\n')));
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}
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if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, out,
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quiet, table, reverse, pw_maxlen, usecrypt, use1, useapr1))
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goto err;
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}
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done = (r <= 0);
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}
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while (!done);
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}
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err:
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ERR_print_errors(bio_err);
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if (salt_malloc)
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OPENSSL_free(salt_malloc);
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if (passwd_malloc)
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OPENSSL_free(passwd_malloc);
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if (in)
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BIO_free(in);
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if (out)
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BIO_free(out);
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EXIT(ret);
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}
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#ifndef NO_MD5CRYPT_1
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/* MD5-based password algorithm (should probably be available as a library
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* function; then the static buffer would not be acceptable).
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* For magic string "1", this should be compatible to the MD5-based BSD
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* password algorithm.
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* For 'magic' string "apr1", this is compatible to the MD5-based Apache
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* password algorithm.
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* (Apparently, the Apache password algorithm is identical except that the
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* 'magic' string was changed -- the laziest application of the NIH principle
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* I've ever encountered.)
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*/
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static char *md5crypt(const char *passwd, const char *magic, const char *salt)
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{
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static char out_buf[6 + 9 + 24 + 2]; /* "$apr1$..salt..$.......md5hash..........\0" */
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unsigned char buf[MD5_DIGEST_LENGTH];
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char *salt_out;
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int n, i;
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MD5_CTX md;
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size_t passwd_len, salt_len;
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passwd_len = strlen(passwd);
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out_buf[0] = '$';
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out_buf[1] = 0;
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assert(strlen(magic) <= 4); /* "1" or "apr1" */
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strncat(out_buf, magic, 4);
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strncat(out_buf, "$", 1);
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strncat(out_buf, salt, 8);
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assert(strlen(out_buf) <= 6 + 8); /* "$apr1$..salt.." */
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salt_out = out_buf + 6;
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salt_len = strlen(salt_out);
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assert(salt_len <= 8);
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MD5_Init(&md);
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MD5_Update(&md, passwd, passwd_len);
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MD5_Update(&md, "$", 1);
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MD5_Update(&md, magic, strlen(magic));
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MD5_Update(&md, "$", 1);
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MD5_Update(&md, salt_out, salt_len);
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{
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MD5_CTX md2;
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MD5_Init(&md2);
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MD5_Update(&md2, passwd, passwd_len);
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MD5_Update(&md2, salt_out, salt_len);
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MD5_Update(&md2, passwd, passwd_len);
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MD5_Final(buf, &md2);
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}
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for (i = passwd_len; i > sizeof buf; i -= sizeof buf)
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MD5_Update(&md, buf, sizeof buf);
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MD5_Update(&md, buf, i);
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n = passwd_len;
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while (n)
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{
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MD5_Update(&md, (n & 1) ? "\0" : passwd, 1);
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n >>= 1;
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}
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MD5_Final(buf, &md);
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for (i = 0; i < 1000; i++)
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{
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MD5_CTX md2;
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MD5_Init(&md2);
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MD5_Update(&md2, (i & 1) ? (unsigned char *) passwd : buf,
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(i & 1) ? passwd_len : sizeof buf);
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if (i % 3)
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MD5_Update(&md2, salt_out, salt_len);
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if (i % 7)
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MD5_Update(&md2, passwd, passwd_len);
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MD5_Update(&md2, (i & 1) ? buf : (unsigned char *) passwd,
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(i & 1) ? sizeof buf : passwd_len);
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MD5_Final(buf, &md2);
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}
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{
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/* transform buf into output string */
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unsigned char buf_perm[sizeof buf];
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int dest, source;
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char *output;
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/* silly output permutation */
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for (dest = 0, source = 0; dest < 14; dest++, source = (source + 6) % 17)
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buf_perm[dest] = buf[source];
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buf_perm[14] = buf[5];
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buf_perm[15] = buf[11];
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#ifndef PEDANTIC /* Unfortunately, this generates a "no effect" warning */
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assert(16 == sizeof buf_perm);
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#endif
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output = salt_out + salt_len;
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assert(output == out_buf + strlen(out_buf));
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*output++ = '$';
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for (i = 0; i < 15; i += 3)
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{
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*output++ = cov_2char[buf_perm[i+2] & 0x3f];
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*output++ = cov_2char[((buf_perm[i+1] & 0xf) << 2) |
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(buf_perm[i+2] >> 6)];
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*output++ = cov_2char[((buf_perm[i] & 3) << 4) |
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(buf_perm[i+1] >> 4)];
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*output++ = cov_2char[buf_perm[i] >> 2];
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}
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assert(i == 15);
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*output++ = cov_2char[buf_perm[i] & 0x3f];
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*output++ = cov_2char[buf_perm[i] >> 6];
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*output = 0;
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assert(strlen(out_buf) < sizeof(out_buf));
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}
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return out_buf;
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}
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#endif
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static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
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char *passwd, BIO *out, int quiet, int table, int reverse,
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size_t pw_maxlen, int usecrypt, int use1, int useapr1)
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{
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char *hash = NULL;
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assert(salt_p != NULL);
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assert(salt_malloc_p != NULL);
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/* first make sure we have a salt */
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if (!passed_salt)
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{
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#ifndef NO_DES
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if (usecrypt)
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{
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if (*salt_malloc_p == NULL)
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{
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*salt_p = *salt_malloc_p = OPENSSL_malloc(3);
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if (*salt_malloc_p == NULL)
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goto err;
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}
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if (RAND_pseudo_bytes((unsigned char *)*salt_p, 2) < 0)
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goto err;
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(*salt_p)[0] = cov_2char[(*salt_p)[0] & 0x3f]; /* 6 bits */
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(*salt_p)[1] = cov_2char[(*salt_p)[1] & 0x3f]; /* 6 bits */
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(*salt_p)[2] = 0;
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#ifdef CHARSET_EBCDIC
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ascii2ebcdic(*salt_p, *salt_p, 2); /* des_crypt will convert
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* back to ASCII */
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#endif
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}
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#endif /* !NO_DES */
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#ifndef NO_MD5CRYPT_1
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if (use1 || useapr1)
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{
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int i;
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if (*salt_malloc_p == NULL)
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{
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*salt_p = *salt_malloc_p = OPENSSL_malloc(9);
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if (*salt_malloc_p == NULL)
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goto err;
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}
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if (RAND_pseudo_bytes((unsigned char *)*salt_p, 8) < 0)
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goto err;
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for (i = 0; i < 8; i++)
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(*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */
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(*salt_p)[8] = 0;
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}
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#endif /* !NO_MD5CRYPT_1 */
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}
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assert(*salt_p != NULL);
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/* truncate password if necessary */
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if ((strlen(passwd) > pw_maxlen))
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{
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if (!quiet)
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BIO_printf(bio_err, "Warning: truncating password to %u characters\n", pw_maxlen);
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passwd[pw_maxlen] = 0;
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}
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assert(strlen(passwd) <= pw_maxlen);
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/* now compute password hash */
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#ifndef NO_DES
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if (usecrypt)
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hash = des_crypt(passwd, *salt_p);
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#endif
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#ifndef NO_MD5CRYPT_1
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if (use1 || useapr1)
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hash = md5crypt(passwd, (use1 ? "1" : "apr1"), *salt_p);
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#endif
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assert(hash != NULL);
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if (table && !reverse)
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BIO_printf(out, "%s\t%s\n", passwd, hash);
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else if (table && reverse)
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BIO_printf(out, "%s\t%s\n", hash, passwd);
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else
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BIO_printf(out, "%s\n", hash);
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return 1;
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err:
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return 0;
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}
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#else
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int MAIN(int argc, char **argv)
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{
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fputs("Program not available.\n", stderr)
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EXIT(1);
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}
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#endif
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