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openssl/apps/passwd.c
Geoff Thorpe 2754597013 A general spring-cleaning (in autumn) to fix up signed/unsigned warnings. 
I have tried to convert 'len' type variable declarations to unsigned as a
means to address these warnings when appropriate, but when in doubt I have
used casts in the comparisons instead. The better solution (that would get
us all lynched by API users) would be to go through and convert all the
function prototypes and structure definitions to use unsigned variables
except when signed is necessary. The proliferation of (signed) "int" for
strictly non-negative uses is unfortunate.
2003-10-29 20:24:15 +00:00

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/* apps/passwd.c */
#if defined OPENSSL_NO_MD5 || defined CHARSET_EBCDIC
# define NO_MD5CRYPT_1
#endif
#if !defined(OPENSSL_NO_DES) || !defined(NO_MD5CRYPT_1)
#include <assert.h>
#include <string.h>
#include "apps.h"
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/rand.h>
#ifndef OPENSSL_NO_DES
# include <openssl/des.h>
#endif
#ifndef NO_MD5CRYPT_1
# include <openssl/md5.h>
#endif
#undef PROG
#define PROG passwd_main
static unsigned const char cov_2char[64]={
/* from crypto/des/fcrypt.c */
0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35,
0x36,0x37,0x38,0x39,0x41,0x42,0x43,0x44,
0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,
0x4D,0x4E,0x4F,0x50,0x51,0x52,0x53,0x54,
0x55,0x56,0x57,0x58,0x59,0x5A,0x61,0x62,
0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,
0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,
0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A
};
static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
char *passwd, BIO *out, int quiet, int table, int reverse,
size_t pw_maxlen, int usecrypt, int use1, int useapr1);
/* -crypt - standard Unix password algorithm (default)
* -1 - MD5-based password algorithm
* -apr1 - MD5-based password algorithm, Apache variant
* -salt string - salt
* -in file - read passwords from file
* -stdin - read passwords from stdin
* -noverify - never verify when reading password from terminal
* -quiet - no warnings
* -table - format output as table
* -reverse - switch table columns
*/
int MAIN(int, char **);
int MAIN(int argc, char **argv)
{
int ret = 1;
char *infile = NULL;
int in_stdin = 0;
int in_noverify = 0;
char *salt = NULL, *passwd = NULL, **passwds = NULL;
char *salt_malloc = NULL, *passwd_malloc = NULL;
size_t passwd_malloc_size = 0;
int pw_source_defined = 0;
BIO *in = NULL, *out = NULL;
int i, badopt, opt_done;
int passed_salt = 0, quiet = 0, table = 0, reverse = 0;
int usecrypt = 0, use1 = 0, useapr1 = 0;
size_t pw_maxlen = 0;
apps_startup();
if (bio_err == NULL)
if ((bio_err=BIO_new(BIO_s_file())) != NULL)
BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
if (!load_config(bio_err, NULL))
goto err;
out = BIO_new(BIO_s_file());
if (out == NULL)
goto err;
BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);
#ifdef OPENSSL_SYS_VMS
{
BIO *tmpbio = BIO_new(BIO_f_linebuffer());
out = BIO_push(tmpbio, out);
}
#endif
badopt = 0, opt_done = 0;
i = 0;
while (!badopt && !opt_done && argv[++i] != NULL)
{
if (strcmp(argv[i], "-crypt") == 0)
usecrypt = 1;
else if (strcmp(argv[i], "-1") == 0)
use1 = 1;
else if (strcmp(argv[i], "-apr1") == 0)
useapr1 = 1;
else if (strcmp(argv[i], "-salt") == 0)
{
if ((argv[i+1] != NULL) && (salt == NULL))
{
passed_salt = 1;
salt = argv[++i];
}
else
badopt = 1;
}
else if (strcmp(argv[i], "-in") == 0)
{
if ((argv[i+1] != NULL) && !pw_source_defined)
{
pw_source_defined = 1;
infile = argv[++i];
}
else
badopt = 1;
}
else if (strcmp(argv[i], "-stdin") == 0)
{
if (!pw_source_defined)
{
pw_source_defined = 1;
in_stdin = 1;
}
else
badopt = 1;
}
else if (strcmp(argv[i], "-noverify") == 0)
in_noverify = 1;
else if (strcmp(argv[i], "-quiet") == 0)
quiet = 1;
else if (strcmp(argv[i], "-table") == 0)
table = 1;
else if (strcmp(argv[i], "-reverse") == 0)
reverse = 1;
else if (argv[i][0] == '-')
badopt = 1;
else if (!pw_source_defined)
/* non-option arguments, use as passwords */
{
pw_source_defined = 1;
passwds = &argv[i];
opt_done = 1;
}
else
badopt = 1;
}
if (!usecrypt && !use1 && !useapr1) /* use default */
usecrypt = 1;
if (usecrypt + use1 + useapr1 > 1) /* conflict */
badopt = 1;
/* reject unsupported algorithms */
#ifdef OPENSSL_NO_DES
if (usecrypt) badopt = 1;
#endif
#ifdef NO_MD5CRYPT_1
if (use1 || useapr1) badopt = 1;
#endif
if (badopt)
{
BIO_printf(bio_err, "Usage: passwd [options] [passwords]\n");
BIO_printf(bio_err, "where options are\n");
#ifndef OPENSSL_NO_DES
BIO_printf(bio_err, "-crypt standard Unix password algorithm (default)\n");
#endif
#ifndef NO_MD5CRYPT_1
BIO_printf(bio_err, "-1 MD5-based password algorithm\n");
BIO_printf(bio_err, "-apr1 MD5-based password algorithm, Apache variant\n");
#endif
BIO_printf(bio_err, "-salt string use provided salt\n");
BIO_printf(bio_err, "-in file read passwords from file\n");
BIO_printf(bio_err, "-stdin read passwords from stdin\n");
BIO_printf(bio_err, "-noverify never verify when reading password from terminal\n");
BIO_printf(bio_err, "-quiet no warnings\n");
BIO_printf(bio_err, "-table format output as table\n");
BIO_printf(bio_err, "-reverse switch table columns\n");
goto err;
}
if ((infile != NULL) || in_stdin)
{
in = BIO_new(BIO_s_file());
if (in == NULL)
goto err;
if (infile != NULL)
{
assert(in_stdin == 0);
if (BIO_read_filename(in, infile) <= 0)
goto err;
}
else
{
assert(in_stdin);
BIO_set_fp(in, stdin, BIO_NOCLOSE);
}
}
if (usecrypt)
pw_maxlen = 8;
else if (use1 || useapr1)
pw_maxlen = 256; /* arbitrary limit, should be enough for most passwords */
if (passwds == NULL)
{
/* no passwords on the command line */
passwd_malloc_size = pw_maxlen + 2;
/* longer than necessary so that we can warn about truncation */
passwd = passwd_malloc = OPENSSL_malloc(passwd_malloc_size);
if (passwd_malloc == NULL)
goto err;
}
if ((in == NULL) && (passwds == NULL))
{
/* build a null-terminated list */
static char *passwds_static[2] = {NULL, NULL};
passwds = passwds_static;
if (in == NULL)
if (EVP_read_pw_string(passwd_malloc, passwd_malloc_size, "Password: ", !(passed_salt || in_noverify)) != 0)
goto err;
passwds[0] = passwd_malloc;
}
if (in == NULL)
{
assert(passwds != NULL);
assert(*passwds != NULL);
do /* loop over list of passwords */
{
passwd = *passwds++;
if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, out,
quiet, table, reverse, pw_maxlen, usecrypt, use1, useapr1))
goto err;
}
while (*passwds != NULL);
}
else
/* in != NULL */
{
int done;
assert (passwd != NULL);
do
{
int r = BIO_gets(in, passwd, pw_maxlen + 1);
if (r > 0)
{
char *c = (strchr(passwd, '\n')) ;
if (c != NULL)
*c = 0; /* truncate at newline */
else
{
/* ignore rest of line */
char trash[BUFSIZ];
do
r = BIO_gets(in, trash, sizeof trash);
while ((r > 0) && (!strchr(trash, '\n')));
}
if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, out,
quiet, table, reverse, pw_maxlen, usecrypt, use1, useapr1))
goto err;
}
done = (r <= 0);
}
while (!done);
}
ret = 0;
err:
ERR_print_errors(bio_err);
if (salt_malloc)
OPENSSL_free(salt_malloc);
if (passwd_malloc)
OPENSSL_free(passwd_malloc);
if (in)
BIO_free(in);
if (out)
BIO_free_all(out);
apps_shutdown();
OPENSSL_EXIT(ret);
}
#ifndef NO_MD5CRYPT_1
/* MD5-based password algorithm (should probably be available as a library
* function; then the static buffer would not be acceptable).
* For magic string "1", this should be compatible to the MD5-based BSD
* password algorithm.
* For 'magic' string "apr1", this is compatible to the MD5-based Apache
* password algorithm.
* (Apparently, the Apache password algorithm is identical except that the
* 'magic' string was changed -- the laziest application of the NIH principle
* I've ever encountered.)
*/
static char *md5crypt(const char *passwd, const char *magic, const char *salt)
{
static char out_buf[6 + 9 + 24 + 2]; /* "$apr1$..salt..$.......md5hash..........\0" */
unsigned char buf[MD5_DIGEST_LENGTH];
char *salt_out;
int n;
unsigned int i;
EVP_MD_CTX md,md2;
size_t passwd_len, salt_len;
passwd_len = strlen(passwd);
out_buf[0] = '$';
out_buf[1] = 0;
assert(strlen(magic) <= 4); /* "1" or "apr1" */
strncat(out_buf, magic, 4);
strncat(out_buf, "$", 1);
strncat(out_buf, salt, 8);
assert(strlen(out_buf) <= 6 + 8); /* "$apr1$..salt.." */
salt_out = out_buf + 2 + strlen(magic);
salt_len = strlen(salt_out);
assert(salt_len <= 8);
EVP_MD_CTX_init(&md);
EVP_DigestInit_ex(&md,EVP_md5(), NULL);
EVP_DigestUpdate(&md, passwd, passwd_len);
EVP_DigestUpdate(&md, "$", 1);
EVP_DigestUpdate(&md, magic, strlen(magic));
EVP_DigestUpdate(&md, "$", 1);
EVP_DigestUpdate(&md, salt_out, salt_len);
EVP_MD_CTX_init(&md2);
EVP_DigestInit_ex(&md2,EVP_md5(), NULL);
EVP_DigestUpdate(&md2, passwd, passwd_len);
EVP_DigestUpdate(&md2, salt_out, salt_len);
EVP_DigestUpdate(&md2, passwd, passwd_len);
EVP_DigestFinal_ex(&md2, buf, NULL);
for (i = passwd_len; i > sizeof buf; i -= sizeof buf)
EVP_DigestUpdate(&md, buf, sizeof buf);
EVP_DigestUpdate(&md, buf, i);
n = passwd_len;
while (n)
{
EVP_DigestUpdate(&md, (n & 1) ? "\0" : passwd, 1);
n >>= 1;
}
EVP_DigestFinal_ex(&md, buf, NULL);
for (i = 0; i < 1000; i++)
{
EVP_DigestInit_ex(&md2,EVP_md5(), NULL);
EVP_DigestUpdate(&md2, (i & 1) ? (unsigned char *) passwd : buf,
(i & 1) ? passwd_len : sizeof buf);
if (i % 3)
EVP_DigestUpdate(&md2, salt_out, salt_len);
if (i % 7)
EVP_DigestUpdate(&md2, passwd, passwd_len);
EVP_DigestUpdate(&md2, (i & 1) ? buf : (unsigned char *) passwd,
(i & 1) ? sizeof buf : passwd_len);
EVP_DigestFinal_ex(&md2, buf, NULL);
}
EVP_MD_CTX_cleanup(&md2);
{
/* transform buf into output string */
unsigned char buf_perm[sizeof buf];
int dest, source;
char *output;
/* silly output permutation */
for (dest = 0, source = 0; dest < 14; dest++, source = (source + 6) % 17)
buf_perm[dest] = buf[source];
buf_perm[14] = buf[5];
buf_perm[15] = buf[11];
#ifndef PEDANTIC /* Unfortunately, this generates a "no effect" warning */
assert(16 == sizeof buf_perm);
#endif
output = salt_out + salt_len;
assert(output == out_buf + strlen(out_buf));
*output++ = '$';
for (i = 0; i < 15; i += 3)
{
*output++ = cov_2char[buf_perm[i+2] & 0x3f];
*output++ = cov_2char[((buf_perm[i+1] & 0xf) << 2) |
(buf_perm[i+2] >> 6)];
*output++ = cov_2char[((buf_perm[i] & 3) << 4) |
(buf_perm[i+1] >> 4)];
*output++ = cov_2char[buf_perm[i] >> 2];
}
assert(i == 15);
*output++ = cov_2char[buf_perm[i] & 0x3f];
*output++ = cov_2char[buf_perm[i] >> 6];
*output = 0;
assert(strlen(out_buf) < sizeof(out_buf));
}
EVP_MD_CTX_cleanup(&md);
return out_buf;
}
#endif
static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p,
char *passwd, BIO *out, int quiet, int table, int reverse,
size_t pw_maxlen, int usecrypt, int use1, int useapr1)
{
char *hash = NULL;
assert(salt_p != NULL);
assert(salt_malloc_p != NULL);
/* first make sure we have a salt */
if (!passed_salt)
{
#ifndef OPENSSL_NO_DES
if (usecrypt)
{
if (*salt_malloc_p == NULL)
{
*salt_p = *salt_malloc_p = OPENSSL_malloc(3);
if (*salt_malloc_p == NULL)
goto err;
}
if (RAND_pseudo_bytes((unsigned char *)*salt_p, 2) < 0)
goto err;
(*salt_p)[0] = cov_2char[(*salt_p)[0] & 0x3f]; /* 6 bits */
(*salt_p)[1] = cov_2char[(*salt_p)[1] & 0x3f]; /* 6 bits */
(*salt_p)[2] = 0;
#ifdef CHARSET_EBCDIC
ascii2ebcdic(*salt_p, *salt_p, 2); /* des_crypt will convert
* back to ASCII */
#endif
}
#endif /* !OPENSSL_NO_DES */
#ifndef NO_MD5CRYPT_1
if (use1 || useapr1)
{
int i;
if (*salt_malloc_p == NULL)
{
*salt_p = *salt_malloc_p = OPENSSL_malloc(9);
if (*salt_malloc_p == NULL)
goto err;
}
if (RAND_pseudo_bytes((unsigned char *)*salt_p, 8) < 0)
goto err;
for (i = 0; i < 8; i++)
(*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */
(*salt_p)[8] = 0;
}
#endif /* !NO_MD5CRYPT_1 */
}
assert(*salt_p != NULL);
/* truncate password if necessary */
if ((strlen(passwd) > pw_maxlen))
{
if (!quiet)
BIO_printf(bio_err, "Warning: truncating password to %u characters\n", pw_maxlen);
passwd[pw_maxlen] = 0;
}
assert(strlen(passwd) <= pw_maxlen);
/* now compute password hash */
#ifndef OPENSSL_NO_DES
if (usecrypt)
hash = DES_crypt(passwd, *salt_p);
#endif
#ifndef NO_MD5CRYPT_1
if (use1 || useapr1)
hash = md5crypt(passwd, (use1 ? "1" : "apr1"), *salt_p);
#endif
assert(hash != NULL);
if (table && !reverse)
BIO_printf(out, "%s\t%s\n", passwd, hash);
else if (table && reverse)
BIO_printf(out, "%s\t%s\n", hash, passwd);
else
BIO_printf(out, "%s\n", hash);
return 1;
err:
return 0;
}
#else
int MAIN(int argc, char **argv)
{
fputs("Program not available.\n", stderr)
OPENSSL_EXIT(1);
}
#endif
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