/* apps/passwd.c */ #if defined NO_MD5 || defined CHARSET_EBCDIC # define NO_MD5CRYPT_1 #endif #if !defined(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 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, only choice) * -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 * -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; 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); out = BIO_new(BIO_s_file()); if (out == NULL) goto err; BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT); 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], "-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 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 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, "-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: ", 0) != 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); } 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(out); 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..$.......md5hash..........\0" */ unsigned char buf[MD5_DIGEST_LENGTH]; char *salt_out; int n, i; MD5_CTX md; size_t passwd_len, salt_len; passwd_len = strlen(passwd); out_buf[0] = '$'; 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$..salt.." */ salt_out = out_buf + 6; salt_len = strlen(salt_out); assert(salt_len <= 8); MD5_Init(&md); MD5_Update(&md, passwd, passwd_len); MD5_Update(&md, "$", 1); MD5_Update(&md, magic, strlen(magic)); MD5_Update(&md, "$", 1); MD5_Update(&md, salt_out, salt_len); { MD5_CTX md2; MD5_Init(&md2); MD5_Update(&md2, passwd, passwd_len); MD5_Update(&md2, salt_out, salt_len); MD5_Update(&md2, passwd, passwd_len); MD5_Final(buf, &md2); } for (i = passwd_len; i > sizeof buf; i -= sizeof buf) MD5_Update(&md, buf, sizeof buf); MD5_Update(&md, buf, i); n = passwd_len; while (n) { MD5_Update(&md, (n & 1) ? "\0" : passwd, 1); n >>= 1; } MD5_Final(buf, &md); for (i = 0; i < 1000; i++) { MD5_CTX md2; MD5_Init(&md2); MD5_Update(&md2, (i & 1) ? (unsigned char *) passwd : buf, (i & 1) ? passwd_len : sizeof buf); if (i % 3) MD5_Update(&md2, salt_out, salt_len); if (i % 7) MD5_Update(&md2, passwd, passwd_len); MD5_Update(&md2, (i & 1) ? buf : (unsigned char *) passwd, (i & 1) ? sizeof buf : passwd_len); MD5_Final(buf, &md2); } { /* transform buf into output string */ unsigned char buf_perm[sizeof buf]; int dest, source; char *output; /* silly output permutation */ for (dest = 0, source = 0; dest < 14; dest++, source = (source + 6) % 17) buf_perm[dest] = buf[source]; buf_perm[14] = buf[5]; buf_perm[15] = buf[11]; #ifndef PEDANTIC /* Unfortunately, this generates a "no effect" warning */ assert(16 == sizeof buf_perm); #endif output = salt_out + salt_len; assert(output == out_buf + strlen(out_buf)); *output++ = '$'; 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)); } 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 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 /* !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 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) EXIT(1); } #endif