passwd.c revision 68651
159191Skris/* apps/passwd.c */ 259191Skris 359191Skris#if defined NO_MD5 || defined CHARSET_EBCDIC 468651Skris# define NO_MD5CRYPT_1 559191Skris#endif 659191Skris 768651Skris#if !defined(NO_DES) || !defined(NO_MD5CRYPT_1) 859191Skris 959191Skris#include <assert.h> 1059191Skris#include <string.h> 1159191Skris 1259191Skris#include "apps.h" 1359191Skris 1459191Skris#include <openssl/bio.h> 1559191Skris#include <openssl/err.h> 1659191Skris#include <openssl/evp.h> 1759191Skris#include <openssl/rand.h> 1859191Skris 1959191Skris#ifndef NO_DES 2059191Skris# include <openssl/des.h> 2159191Skris#endif 2268651Skris#ifndef NO_MD5CRYPT_1 2359191Skris# include <openssl/md5.h> 2459191Skris#endif 2559191Skris 2659191Skris 2759191Skris#undef PROG 2859191Skris#define PROG passwd_main 2959191Skris 3059191Skris 3159191Skrisstatic unsigned const char cov_2char[64]={ 3259191Skris /* from crypto/des/fcrypt.c */ 3359191Skris 0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35, 3459191Skris 0x36,0x37,0x38,0x39,0x41,0x42,0x43,0x44, 3559191Skris 0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C, 3659191Skris 0x4D,0x4E,0x4F,0x50,0x51,0x52,0x53,0x54, 3759191Skris 0x55,0x56,0x57,0x58,0x59,0x5A,0x61,0x62, 3859191Skris 0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A, 3959191Skris 0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72, 4059191Skris 0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A 4159191Skris}; 4259191Skris 4359191Skrisstatic int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p, 4459191Skris char *passwd, BIO *out, int quiet, int table, int reverse, 4568651Skris size_t pw_maxlen, int usecrypt, int use1, int useapr1); 4659191Skris 4768651Skris/* -crypt - standard Unix password algorithm (default) 4868651Skris * -1 - MD5-based password algorithm 4968651Skris * -apr1 - MD5-based password algorithm, Apache variant 5059191Skris * -salt string - salt 5159191Skris * -in file - read passwords from file 5259191Skris * -stdin - read passwords from stdin 5359191Skris * -quiet - no warnings 5459191Skris * -table - format output as table 5559191Skris * -reverse - switch table columns 5659191Skris */ 5759191Skris 5859191Skrisint MAIN(int, char **); 5959191Skris 6059191Skrisint MAIN(int argc, char **argv) 6159191Skris { 6259191Skris int ret = 1; 6359191Skris char *infile = NULL; 6459191Skris int in_stdin = 0; 6559191Skris char *salt = NULL, *passwd = NULL, **passwds = NULL; 6659191Skris char *salt_malloc = NULL, *passwd_malloc = NULL; 6768651Skris size_t passwd_malloc_size = 0; 6859191Skris int pw_source_defined = 0; 6959191Skris BIO *in = NULL, *out = NULL; 7059191Skris int i, badopt, opt_done; 7159191Skris int passed_salt = 0, quiet = 0, table = 0, reverse = 0; 7268651Skris int usecrypt = 0, use1 = 0, useapr1 = 0; 7359191Skris size_t pw_maxlen = 0; 7459191Skris 7559191Skris apps_startup(); 7659191Skris 7759191Skris if (bio_err == NULL) 7859191Skris if ((bio_err=BIO_new(BIO_s_file())) != NULL) 7959191Skris BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); 8059191Skris out = BIO_new(BIO_s_file()); 8159191Skris if (out == NULL) 8259191Skris goto err; 8359191Skris BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT); 8468651Skris#ifdef VMS 8568651Skris { 8668651Skris BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 8768651Skris out = BIO_push(tmpbio, out); 8868651Skris } 8968651Skris#endif 9059191Skris 9159191Skris badopt = 0, opt_done = 0; 9259191Skris i = 0; 9359191Skris while (!badopt && !opt_done && argv[++i] != NULL) 9459191Skris { 9559191Skris if (strcmp(argv[i], "-crypt") == 0) 9659191Skris usecrypt = 1; 9768651Skris else if (strcmp(argv[i], "-1") == 0) 9868651Skris use1 = 1; 9959191Skris else if (strcmp(argv[i], "-apr1") == 0) 10059191Skris useapr1 = 1; 10159191Skris else if (strcmp(argv[i], "-salt") == 0) 10259191Skris { 10359191Skris if ((argv[i+1] != NULL) && (salt == NULL)) 10459191Skris { 10559191Skris passed_salt = 1; 10659191Skris salt = argv[++i]; 10759191Skris } 10859191Skris else 10959191Skris badopt = 1; 11059191Skris } 11159191Skris else if (strcmp(argv[i], "-in") == 0) 11259191Skris { 11359191Skris if ((argv[i+1] != NULL) && !pw_source_defined) 11459191Skris { 11559191Skris pw_source_defined = 1; 11659191Skris infile = argv[++i]; 11759191Skris } 11859191Skris else 11959191Skris badopt = 1; 12059191Skris } 12159191Skris else if (strcmp(argv[i], "-stdin") == 0) 12259191Skris { 12359191Skris if (!pw_source_defined) 12459191Skris { 12559191Skris pw_source_defined = 1; 12659191Skris in_stdin = 1; 12759191Skris } 12859191Skris else 12959191Skris badopt = 1; 13059191Skris } 13159191Skris else if (strcmp(argv[i], "-quiet") == 0) 13259191Skris quiet = 1; 13359191Skris else if (strcmp(argv[i], "-table") == 0) 13459191Skris table = 1; 13559191Skris else if (strcmp(argv[i], "-reverse") == 0) 13659191Skris reverse = 1; 13759191Skris else if (argv[i][0] == '-') 13859191Skris badopt = 1; 13959191Skris else if (!pw_source_defined) 14059191Skris /* non-option arguments, use as passwords */ 14159191Skris { 14259191Skris pw_source_defined = 1; 14359191Skris passwds = &argv[i]; 14459191Skris opt_done = 1; 14559191Skris } 14659191Skris else 14759191Skris badopt = 1; 14859191Skris } 14959191Skris 15068651Skris if (!usecrypt && !use1 && !useapr1) /* use default */ 15159191Skris usecrypt = 1; 15268651Skris if (usecrypt + use1 + useapr1 > 1) /* conflict */ 15359191Skris badopt = 1; 15459191Skris 15559191Skris /* reject unsupported algorithms */ 15659191Skris#ifdef NO_DES 15759191Skris if (usecrypt) badopt = 1; 15859191Skris#endif 15968651Skris#ifdef NO_MD5CRYPT_1 16068651Skris if (use1 || useapr1) badopt = 1; 16159191Skris#endif 16259191Skris 16359191Skris if (badopt) 16459191Skris { 16559191Skris BIO_printf(bio_err, "Usage: passwd [options] [passwords]\n"); 16659191Skris BIO_printf(bio_err, "where options are\n"); 16759191Skris#ifndef NO_DES 16859191Skris BIO_printf(bio_err, "-crypt standard Unix password algorithm (default)\n"); 16959191Skris#endif 17068651Skris#ifndef NO_MD5CRYPT_1 17168651Skris BIO_printf(bio_err, "-1 MD5-based password algorithm\n"); 17268651Skris BIO_printf(bio_err, "-apr1 MD5-based password algorithm, Apache variant\n"); 17359191Skris#endif 17459191Skris BIO_printf(bio_err, "-salt string use provided salt\n"); 17559191Skris BIO_printf(bio_err, "-in file read passwords from file\n"); 17659191Skris BIO_printf(bio_err, "-stdin read passwords from stdin\n"); 17759191Skris BIO_printf(bio_err, "-quiet no warnings\n"); 17859191Skris BIO_printf(bio_err, "-table format output as table\n"); 17959191Skris BIO_printf(bio_err, "-reverse switch table columns\n"); 18059191Skris 18159191Skris goto err; 18259191Skris } 18359191Skris 18459191Skris if ((infile != NULL) || in_stdin) 18559191Skris { 18659191Skris in = BIO_new(BIO_s_file()); 18759191Skris if (in == NULL) 18859191Skris goto err; 18959191Skris if (infile != NULL) 19059191Skris { 19159191Skris assert(in_stdin == 0); 19259191Skris if (BIO_read_filename(in, infile) <= 0) 19359191Skris goto err; 19459191Skris } 19559191Skris else 19659191Skris { 19759191Skris assert(in_stdin); 19859191Skris BIO_set_fp(in, stdin, BIO_NOCLOSE); 19959191Skris } 20059191Skris } 20159191Skris 20259191Skris if (usecrypt) 20359191Skris pw_maxlen = 8; 20468651Skris else if (use1 || useapr1) 20559191Skris pw_maxlen = 256; /* arbitrary limit, should be enough for most passwords */ 20659191Skris 20759191Skris if (passwds == NULL) 20859191Skris { 20959191Skris /* no passwords on the command line */ 21068651Skris 21168651Skris passwd_malloc_size = pw_maxlen + 2; 21268651Skris /* longer than necessary so that we can warn about truncation */ 21368651Skris passwd = passwd_malloc = OPENSSL_malloc(passwd_malloc_size); 21459191Skris if (passwd_malloc == NULL) 21559191Skris goto err; 21659191Skris } 21759191Skris 21859191Skris if ((in == NULL) && (passwds == NULL)) 21959191Skris { 22059191Skris /* build a null-terminated list */ 22159191Skris static char *passwds_static[2] = {NULL, NULL}; 22259191Skris 22359191Skris passwds = passwds_static; 22459191Skris if (in == NULL) 22568651Skris if (EVP_read_pw_string(passwd_malloc, passwd_malloc_size, "Password: ", 0) != 0) 22659191Skris goto err; 22759191Skris passwds[0] = passwd_malloc; 22859191Skris } 22959191Skris 23059191Skris if (in == NULL) 23159191Skris { 23259191Skris assert(passwds != NULL); 23359191Skris assert(*passwds != NULL); 23459191Skris 23559191Skris do /* loop over list of passwords */ 23659191Skris { 23759191Skris passwd = *passwds++; 23859191Skris if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, out, 23968651Skris quiet, table, reverse, pw_maxlen, usecrypt, use1, useapr1)) 24059191Skris goto err; 24159191Skris } 24259191Skris while (*passwds != NULL); 24359191Skris } 24459191Skris else 24559191Skris /* in != NULL */ 24659191Skris { 24759191Skris int done; 24859191Skris 24959191Skris assert (passwd != NULL); 25059191Skris do 25159191Skris { 25259191Skris int r = BIO_gets(in, passwd, pw_maxlen + 1); 25359191Skris if (r > 0) 25459191Skris { 25559191Skris char *c = (strchr(passwd, '\n')) ; 25659191Skris if (c != NULL) 25759191Skris *c = 0; /* truncate at newline */ 25859191Skris else 25959191Skris { 26059191Skris /* ignore rest of line */ 26159191Skris char trash[BUFSIZ]; 26259191Skris do 26359191Skris r = BIO_gets(in, trash, sizeof trash); 26459191Skris while ((r > 0) && (!strchr(trash, '\n'))); 26559191Skris } 26659191Skris 26759191Skris if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, out, 26868651Skris quiet, table, reverse, pw_maxlen, usecrypt, use1, useapr1)) 26959191Skris goto err; 27059191Skris } 27159191Skris done = (r <= 0); 27259191Skris } 27359191Skris while (!done); 27459191Skris } 27559191Skris 27659191Skriserr: 27759191Skris ERR_print_errors(bio_err); 27859191Skris if (salt_malloc) 27968651Skris OPENSSL_free(salt_malloc); 28059191Skris if (passwd_malloc) 28168651Skris OPENSSL_free(passwd_malloc); 28259191Skris if (in) 28359191Skris BIO_free(in); 28459191Skris if (out) 28568651Skris BIO_free_all(out); 28659191Skris EXIT(ret); 28759191Skris } 28859191Skris 28959191Skris 29068651Skris#ifndef NO_MD5CRYPT_1 29168651Skris/* MD5-based password algorithm (should probably be available as a library 29268651Skris * function; then the static buffer would not be acceptable). 29368651Skris * For magic string "1", this should be compatible to the MD5-based BSD 29468651Skris * password algorithm. 29568651Skris * For 'magic' string "apr1", this is compatible to the MD5-based Apache 29668651Skris * password algorithm. 29768651Skris * (Apparently, the Apache password algorithm is identical except that the 29868651Skris * 'magic' string was changed -- the laziest application of the NIH principle 29968651Skris * I've ever encountered.) 30068651Skris */ 30168651Skrisstatic char *md5crypt(const char *passwd, const char *magic, const char *salt) 30259191Skris { 30359191Skris static char out_buf[6 + 9 + 24 + 2]; /* "$apr1$..salt..$.......md5hash..........\0" */ 30459191Skris unsigned char buf[MD5_DIGEST_LENGTH]; 30559191Skris char *salt_out; 30659191Skris int n, i; 30759191Skris MD5_CTX md; 30859191Skris size_t passwd_len, salt_len; 30959191Skris 31059191Skris passwd_len = strlen(passwd); 31168651Skris out_buf[0] = '$'; 31268651Skris out_buf[1] = 0; 31368651Skris assert(strlen(magic) <= 4); /* "1" or "apr1" */ 31468651Skris strncat(out_buf, magic, 4); 31568651Skris strncat(out_buf, "$", 1); 31659191Skris strncat(out_buf, salt, 8); 31759191Skris assert(strlen(out_buf) <= 6 + 8); /* "$apr1$..salt.." */ 31859191Skris salt_out = out_buf + 6; 31959191Skris salt_len = strlen(salt_out); 32059191Skris assert(salt_len <= 8); 32159191Skris 32259191Skris MD5_Init(&md); 32359191Skris MD5_Update(&md, passwd, passwd_len); 32468651Skris MD5_Update(&md, "$", 1); 32568651Skris MD5_Update(&md, magic, strlen(magic)); 32668651Skris MD5_Update(&md, "$", 1); 32759191Skris MD5_Update(&md, salt_out, salt_len); 32859191Skris 32959191Skris { 33059191Skris MD5_CTX md2; 33159191Skris 33259191Skris MD5_Init(&md2); 33359191Skris MD5_Update(&md2, passwd, passwd_len); 33459191Skris MD5_Update(&md2, salt_out, salt_len); 33559191Skris MD5_Update(&md2, passwd, passwd_len); 33659191Skris MD5_Final(buf, &md2); 33759191Skris } 33859191Skris for (i = passwd_len; i > sizeof buf; i -= sizeof buf) 33959191Skris MD5_Update(&md, buf, sizeof buf); 34059191Skris MD5_Update(&md, buf, i); 34159191Skris 34259191Skris n = passwd_len; 34359191Skris while (n) 34459191Skris { 34559191Skris MD5_Update(&md, (n & 1) ? "\0" : passwd, 1); 34659191Skris n >>= 1; 34759191Skris } 34859191Skris MD5_Final(buf, &md); 34959191Skris 35059191Skris for (i = 0; i < 1000; i++) 35159191Skris { 35259191Skris MD5_CTX md2; 35359191Skris 35459191Skris MD5_Init(&md2); 35559191Skris MD5_Update(&md2, (i & 1) ? (unsigned char *) passwd : buf, 35659191Skris (i & 1) ? passwd_len : sizeof buf); 35759191Skris if (i % 3) 35859191Skris MD5_Update(&md2, salt_out, salt_len); 35959191Skris if (i % 7) 36059191Skris MD5_Update(&md2, passwd, passwd_len); 36159191Skris MD5_Update(&md2, (i & 1) ? buf : (unsigned char *) passwd, 36259191Skris (i & 1) ? sizeof buf : passwd_len); 36359191Skris MD5_Final(buf, &md2); 36459191Skris } 36559191Skris 36659191Skris { 36759191Skris /* transform buf into output string */ 36859191Skris 36959191Skris unsigned char buf_perm[sizeof buf]; 37059191Skris int dest, source; 37159191Skris char *output; 37259191Skris 37359191Skris /* silly output permutation */ 37459191Skris for (dest = 0, source = 0; dest < 14; dest++, source = (source + 6) % 17) 37559191Skris buf_perm[dest] = buf[source]; 37659191Skris buf_perm[14] = buf[5]; 37759191Skris buf_perm[15] = buf[11]; 37859191Skris#ifndef PEDANTIC /* Unfortunately, this generates a "no effect" warning */ 37959191Skris assert(16 == sizeof buf_perm); 38059191Skris#endif 38159191Skris 38259191Skris output = salt_out + salt_len; 38359191Skris assert(output == out_buf + strlen(out_buf)); 38459191Skris 38559191Skris *output++ = '$'; 38659191Skris 38759191Skris for (i = 0; i < 15; i += 3) 38859191Skris { 38959191Skris *output++ = cov_2char[buf_perm[i+2] & 0x3f]; 39059191Skris *output++ = cov_2char[((buf_perm[i+1] & 0xf) << 2) | 39159191Skris (buf_perm[i+2] >> 6)]; 39259191Skris *output++ = cov_2char[((buf_perm[i] & 3) << 4) | 39359191Skris (buf_perm[i+1] >> 4)]; 39459191Skris *output++ = cov_2char[buf_perm[i] >> 2]; 39559191Skris } 39659191Skris assert(i == 15); 39759191Skris *output++ = cov_2char[buf_perm[i] & 0x3f]; 39859191Skris *output++ = cov_2char[buf_perm[i] >> 6]; 39959191Skris *output = 0; 40059191Skris assert(strlen(out_buf) < sizeof(out_buf)); 40159191Skris } 40259191Skris 40359191Skris return out_buf; 40459191Skris } 40559191Skris#endif 40659191Skris 40759191Skris 40859191Skrisstatic int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p, 40959191Skris char *passwd, BIO *out, int quiet, int table, int reverse, 41068651Skris size_t pw_maxlen, int usecrypt, int use1, int useapr1) 41159191Skris { 41259191Skris char *hash = NULL; 41359191Skris 41459191Skris assert(salt_p != NULL); 41559191Skris assert(salt_malloc_p != NULL); 41659191Skris 41759191Skris /* first make sure we have a salt */ 41859191Skris if (!passed_salt) 41959191Skris { 42059191Skris#ifndef NO_DES 42159191Skris if (usecrypt) 42259191Skris { 42359191Skris if (*salt_malloc_p == NULL) 42459191Skris { 42568651Skris *salt_p = *salt_malloc_p = OPENSSL_malloc(3); 42659191Skris if (*salt_malloc_p == NULL) 42759191Skris goto err; 42859191Skris } 42959191Skris if (RAND_pseudo_bytes((unsigned char *)*salt_p, 2) < 0) 43059191Skris goto err; 43159191Skris (*salt_p)[0] = cov_2char[(*salt_p)[0] & 0x3f]; /* 6 bits */ 43259191Skris (*salt_p)[1] = cov_2char[(*salt_p)[1] & 0x3f]; /* 6 bits */ 43359191Skris (*salt_p)[2] = 0; 43459191Skris#ifdef CHARSET_EBCDIC 43559191Skris ascii2ebcdic(*salt_p, *salt_p, 2); /* des_crypt will convert 43659191Skris * back to ASCII */ 43759191Skris#endif 43859191Skris } 43959191Skris#endif /* !NO_DES */ 44059191Skris 44168651Skris#ifndef NO_MD5CRYPT_1 44268651Skris if (use1 || useapr1) 44359191Skris { 44459191Skris int i; 44559191Skris 44659191Skris if (*salt_malloc_p == NULL) 44759191Skris { 44868651Skris *salt_p = *salt_malloc_p = OPENSSL_malloc(9); 44959191Skris if (*salt_malloc_p == NULL) 45059191Skris goto err; 45159191Skris } 45259191Skris if (RAND_pseudo_bytes((unsigned char *)*salt_p, 8) < 0) 45359191Skris goto err; 45459191Skris 45559191Skris for (i = 0; i < 8; i++) 45659191Skris (*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */ 45759191Skris (*salt_p)[8] = 0; 45859191Skris } 45968651Skris#endif /* !NO_MD5CRYPT_1 */ 46059191Skris } 46159191Skris 46259191Skris assert(*salt_p != NULL); 46359191Skris 46459191Skris /* truncate password if necessary */ 46559191Skris if ((strlen(passwd) > pw_maxlen)) 46659191Skris { 46759191Skris if (!quiet) 46859191Skris BIO_printf(bio_err, "Warning: truncating password to %u characters\n", pw_maxlen); 46959191Skris passwd[pw_maxlen] = 0; 47059191Skris } 47159191Skris assert(strlen(passwd) <= pw_maxlen); 47259191Skris 47359191Skris /* now compute password hash */ 47459191Skris#ifndef NO_DES 47559191Skris if (usecrypt) 47659191Skris hash = des_crypt(passwd, *salt_p); 47759191Skris#endif 47868651Skris#ifndef NO_MD5CRYPT_1 47968651Skris if (use1 || useapr1) 48068651Skris hash = md5crypt(passwd, (use1 ? "1" : "apr1"), *salt_p); 48159191Skris#endif 48259191Skris assert(hash != NULL); 48359191Skris 48459191Skris if (table && !reverse) 48559191Skris BIO_printf(out, "%s\t%s\n", passwd, hash); 48659191Skris else if (table && reverse) 48759191Skris BIO_printf(out, "%s\t%s\n", hash, passwd); 48859191Skris else 48959191Skris BIO_printf(out, "%s\n", hash); 49059191Skris return 1; 49159191Skris 49259191Skriserr: 49359191Skris return 0; 49459191Skris } 49559191Skris#else 49659191Skris 49759191Skrisint MAIN(int argc, char **argv) 49859191Skris { 49959191Skris fputs("Program not available.\n", stderr) 50059191Skris EXIT(1); 50159191Skris } 50259191Skris#endif 503