diff options
Diffstat (limited to 'apps/passwd.c')
-rw-r--r-- | apps/passwd.c | 502 |
1 files changed, 502 insertions, 0 deletions
diff --git a/apps/passwd.c b/apps/passwd.c new file mode 100644 index 0000000000..6851a9927d --- /dev/null +++ b/apps/passwd.c @@ -0,0 +1,502 @@ +/* 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) + * -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); +#ifdef 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], "-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_all(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 |