diff options
Diffstat (limited to 'apps/passwd.c')
| -rw-r--r-- | apps/passwd.c | 975 |
1 files changed, 667 insertions, 308 deletions
diff --git a/apps/passwd.c b/apps/passwd.c index 56e10ad3d8f1..aa516c874e65 100644 --- a/apps/passwd.c +++ b/apps/passwd.c @@ -1,29 +1,26 @@ -/* 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) +/* + * Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ -# include <assert.h> -# include <string.h> +#include <string.h> -# include "apps.h" +#include "apps.h" +#include "progs.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 +#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 +#include <openssl/md5.h> +#include <openssl/sha.h> static unsigned const char cov_2char[64] = { /* from crypto/des/fcrypt.c */ @@ -37,191 +34,220 @@ static unsigned const char cov_2char[64] = { 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A }; +static const char ascii_dollar[] = { 0x24, 0x00 }; + +typedef enum { + passwd_unset = 0, + passwd_crypt, + passwd_md5, + passwd_apr1, + passwd_sha256, + passwd_sha512, + passwd_aixmd5 +} passwd_modes; + 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 reverse, size_t pw_maxlen, passwd_modes mode); + +typedef enum OPTION_choice { + OPT_ERR = -1, OPT_EOF = 0, OPT_HELP, + OPT_IN, + OPT_NOVERIFY, OPT_QUIET, OPT_TABLE, OPT_REVERSE, OPT_APR1, + OPT_1, OPT_5, OPT_6, OPT_CRYPT, OPT_AIXMD5, OPT_SALT, OPT_STDIN, + OPT_R_ENUM +} OPTION_CHOICE; + +const OPTIONS passwd_options[] = { + {"help", OPT_HELP, '-', "Display this summary"}, + {"in", OPT_IN, '<', "Read passwords from file"}, + {"noverify", OPT_NOVERIFY, '-', + "Never verify when reading password from terminal"}, + {"quiet", OPT_QUIET, '-', "No warnings"}, + {"table", OPT_TABLE, '-', "Format output as table"}, + {"reverse", OPT_REVERSE, '-', "Switch table columns"}, + {"salt", OPT_SALT, 's', "Use provided salt"}, + {"stdin", OPT_STDIN, '-', "Read passwords from stdin"}, + {"6", OPT_6, '-', "SHA512-based password algorithm"}, + {"5", OPT_5, '-', "SHA256-based password algorithm"}, + {"apr1", OPT_APR1, '-', "MD5-based password algorithm, Apache variant"}, + {"1", OPT_1, '-', "MD5-based password algorithm"}, + {"aixmd5", OPT_AIXMD5, '-', "AIX MD5-based password algorithm"}, +#ifndef OPENSSL_NO_DES + {"crypt", OPT_CRYPT, '-', "Standard Unix password algorithm (default)"}, +#endif + OPT_R_OPTIONS, + {NULL} +}; -int MAIN(int argc, char **argv) +int passwd_main(int argc, char **argv) { - int ret = 1; - char *infile = NULL; - int in_stdin = 0; + BIO *in = NULL; + char *infile = NULL, *salt = NULL, *passwd = NULL, **passwds = NULL; + char *salt_malloc = NULL, *passwd_malloc = NULL, *prog; + OPTION_CHOICE o; + int in_stdin = 0, pw_source_defined = 0; +#ifndef OPENSSL_NO_UI_CONSOLE 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; +#endif 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) + int ret = 1; + passwd_modes mode = passwd_unset; + size_t passwd_malloc_size = 0; + size_t pw_maxlen = 256; /* arbitrary limit, should be enough for most + * passwords */ + + prog = opt_init(argc, argv, passwd_options); + while ((o = opt_next()) != OPT_EOF) { + switch (o) { + case OPT_EOF: + case OPT_ERR: + opthelp: + BIO_printf(bio_err, "%s: Use -help for summary.\n", prog); + goto end; + case OPT_HELP: + opt_help(passwd_options); + ret = 0; + goto end; + case OPT_IN: + if (pw_source_defined) + goto opthelp; + infile = opt_arg(); + pw_source_defined = 1; + break; + case OPT_NOVERIFY: +#ifndef OPENSSL_NO_UI_CONSOLE in_noverify = 1; - else if (strcmp(argv[i], "-quiet") == 0) +#endif + break; + case OPT_QUIET: quiet = 1; - else if (strcmp(argv[i], "-table") == 0) + break; + case OPT_TABLE: table = 1; - else if (strcmp(argv[i], "-reverse") == 0) + break; + case OPT_REVERSE: reverse = 1; - else if (argv[i][0] == '-') - badopt = 1; - else if (!pw_source_defined) - /* non-option arguments, use as passwords */ - { + break; + case OPT_1: + if (mode != passwd_unset) + goto opthelp; + mode = passwd_md5; + break; + case OPT_5: + if (mode != passwd_unset) + goto opthelp; + mode = passwd_sha256; + break; + case OPT_6: + if (mode != passwd_unset) + goto opthelp; + mode = passwd_sha512; + break; + case OPT_APR1: + if (mode != passwd_unset) + goto opthelp; + mode = passwd_apr1; + break; + case OPT_AIXMD5: + if (mode != passwd_unset) + goto opthelp; + mode = passwd_aixmd5; + break; + case OPT_CRYPT: +#ifndef OPENSSL_NO_DES + if (mode != passwd_unset) + goto opthelp; + mode = passwd_crypt; +#endif + break; + case OPT_SALT: + passed_salt = 1; + salt = opt_arg(); + break; + case OPT_STDIN: + if (pw_source_defined) + goto opthelp; + in_stdin = 1; pw_source_defined = 1; - passwds = &argv[i]; - opt_done = 1; - } else - badopt = 1; + break; + case OPT_R_CASES: + if (!opt_rand(o)) + goto end; + break; + } + } + argc = opt_num_rest(); + argv = opt_rest(); + + if (*argv != NULL) { + if (pw_source_defined) + goto opthelp; + pw_source_defined = 1; + passwds = argv; } - 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 (mode == passwd_unset) { + /* use default */ + mode = passwd_crypt; + } - 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"); +#ifdef OPENSSL_NO_DES + if (mode == passwd_crypt) + goto opthelp; +#endif - goto err; + if (infile != NULL && in_stdin) { + BIO_printf(bio_err, "%s: Can't combine -in and -stdin\n", prog); + goto end; } - if ((infile != NULL) || in_stdin) { - in = BIO_new(BIO_s_file()); + if (infile != NULL || in_stdin) { + /* + * If in_stdin is true, we know that infile is NULL, and that + * bio_open_default() will give us back an alias for stdin. + */ + in = bio_open_default(infile, 'r', FORMAT_TEXT); 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); - } + goto end; } - if (usecrypt) + if (mode == passwd_crypt) 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; + /* longer than necessary so that we can warn about truncation */ + passwd = passwd_malloc = + app_malloc(passwd_malloc_size, "password buffer"); } 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; + /* + * we use the following method to make sure what + * in the 'else' section is always compiled, to + * avoid rot of not-frequently-used code. + */ + if (1) { +#ifndef OPENSSL_NO_UI_CONSOLE + /* 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 end; + } + passwds[0] = passwd_malloc; + } else { +#endif + BIO_printf(bio_err, "password required\n"); + goto end; + } } if (in == NULL) { @@ -230,15 +256,12 @@ int MAIN(int argc, char **argv) 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 + if (!do_passwd(passed_salt, &salt, &salt_malloc, passwd, bio_out, + quiet, table, reverse, pw_maxlen, mode)) + goto end; + } while (*passwds != NULL); + } else { /* in != NULL */ - { int done; assert(passwd != NULL); @@ -246,9 +269,9 @@ int MAIN(int argc, char **argv) int r = BIO_gets(in, passwd, pw_maxlen + 1); if (r > 0) { char *c = (strchr(passwd, '\n')); - if (c != NULL) + if (c != NULL) { *c = 0; /* truncate at newline */ - else { + } else { /* ignore rest of line */ char trash[BUFSIZ]; do @@ -256,32 +279,26 @@ int MAIN(int argc, char **argv) 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; + if (!do_passwd + (passed_salt, &salt, &salt_malloc, passwd, bio_out, quiet, + table, reverse, pw_maxlen, mode)) + goto end; } done = (r <= 0); - } - while (!done); + } while (!done); } ret = 0; - err: + end: +#if 0 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); +#endif + OPENSSL_free(salt_malloc); + OPENSSL_free(passwd_malloc); + BIO_free(in); + return 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 @@ -296,67 +313,131 @@ static char *md5crypt(const char *passwd, const char *magic, const char *salt) /* "$apr1$..salt..$.......md5hash..........\0" */ static char out_buf[6 + 9 + 24 + 2]; unsigned char buf[MD5_DIGEST_LENGTH]; + char ascii_magic[5]; /* "apr1" plus '\0' */ + char ascii_salt[9]; /* Max 8 chars plus '\0' */ + char *ascii_passwd = NULL; char *salt_out; int n; unsigned int i; - EVP_MD_CTX md, md2; - size_t passwd_len, salt_len; + EVP_MD_CTX *md = NULL, *md2 = NULL; + size_t passwd_len, salt_len, magic_len; passwd_len = strlen(passwd); - out_buf[0] = '$'; - 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, "$", 1); - EVP_DigestUpdate(&md, salt_out, salt_len); - - EVP_MD_CTX_init(&md2); - EVP_DigestInit_ex(&md2, EVP_md5(), NULL); - EVP_DigestUpdate(&md2, passwd, passwd_len); - EVP_DigestUpdate(&md2, salt_out, salt_len); - EVP_DigestUpdate(&md2, passwd, passwd_len); - EVP_DigestFinal_ex(&md2, buf, NULL); - - for (i = passwd_len; i > sizeof(buf); i -= sizeof(buf)) - EVP_DigestUpdate(&md, buf, sizeof(buf)); - EVP_DigestUpdate(&md, buf, i); + + out_buf[0] = 0; + magic_len = strlen(magic); + OPENSSL_strlcpy(ascii_magic, magic, sizeof(ascii_magic)); +#ifdef CHARSET_EBCDIC + if ((magic[0] & 0x80) != 0) /* High bit is 1 in EBCDIC alnums */ + ebcdic2ascii(ascii_magic, ascii_magic, magic_len); +#endif + + /* The salt gets truncated to 8 chars */ + OPENSSL_strlcpy(ascii_salt, salt, sizeof(ascii_salt)); + salt_len = strlen(ascii_salt); +#ifdef CHARSET_EBCDIC + ebcdic2ascii(ascii_salt, ascii_salt, salt_len); +#endif + +#ifdef CHARSET_EBCDIC + ascii_passwd = OPENSSL_strdup(passwd); + if (ascii_passwd == NULL) + return NULL; + ebcdic2ascii(ascii_passwd, ascii_passwd, passwd_len); + passwd = ascii_passwd; +#endif + + if (magic_len > 0) { + OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf)); + + if (magic_len > 4) /* assert it's "1" or "apr1" */ + goto err; + + OPENSSL_strlcat(out_buf, ascii_magic, sizeof(out_buf)); + OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf)); + } + + OPENSSL_strlcat(out_buf, ascii_salt, sizeof(out_buf)); + + if (strlen(out_buf) > 6 + 8) /* assert "$apr1$..salt.." */ + goto err; + + salt_out = out_buf; + if (magic_len > 0) + salt_out += 2 + magic_len; + + if (salt_len > 8) + goto err; + + md = EVP_MD_CTX_new(); + if (md == NULL + || !EVP_DigestInit_ex(md, EVP_md5(), NULL) + || !EVP_DigestUpdate(md, passwd, passwd_len)) + goto err; + + if (magic_len > 0) + if (!EVP_DigestUpdate(md, ascii_dollar, 1) + || !EVP_DigestUpdate(md, ascii_magic, magic_len) + || !EVP_DigestUpdate(md, ascii_dollar, 1)) + goto err; + + if (!EVP_DigestUpdate(md, ascii_salt, salt_len)) + goto err; + + md2 = EVP_MD_CTX_new(); + if (md2 == NULL + || !EVP_DigestInit_ex(md2, EVP_md5(), NULL) + || !EVP_DigestUpdate(md2, passwd, passwd_len) + || !EVP_DigestUpdate(md2, ascii_salt, salt_len) + || !EVP_DigestUpdate(md2, passwd, passwd_len) + || !EVP_DigestFinal_ex(md2, buf, NULL)) + goto err; + + for (i = passwd_len; i > sizeof(buf); i -= sizeof(buf)) { + if (!EVP_DigestUpdate(md, buf, sizeof(buf))) + goto err; + } + if (!EVP_DigestUpdate(md, buf, i)) + goto err; n = passwd_len; while (n) { - EVP_DigestUpdate(&md, (n & 1) ? "\0" : passwd, 1); + if (!EVP_DigestUpdate(md, (n & 1) ? "\0" : passwd, 1)) + goto err; n >>= 1; } - EVP_DigestFinal_ex(&md, buf, NULL); + if (!EVP_DigestFinal_ex(md, buf, NULL)) + return NULL; for (i = 0; i < 1000; i++) { - EVP_DigestInit_ex(&md2, EVP_md5(), NULL); - EVP_DigestUpdate(&md2, (i & 1) ? (unsigned const 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 const char *)passwd, - (i & 1) ? sizeof(buf) : passwd_len); - EVP_DigestFinal_ex(&md2, buf, NULL); + if (!EVP_DigestInit_ex(md2, EVP_md5(), NULL)) + goto err; + if (!EVP_DigestUpdate(md2, + (i & 1) ? (unsigned const char *)passwd : buf, + (i & 1) ? passwd_len : sizeof(buf))) + goto err; + if (i % 3) { + if (!EVP_DigestUpdate(md2, ascii_salt, salt_len)) + goto err; + } + if (i % 7) { + if (!EVP_DigestUpdate(md2, passwd, passwd_len)) + goto err; + } + if (!EVP_DigestUpdate(md2, + (i & 1) ? buf : (unsigned const char *)passwd, + (i & 1) ? sizeof(buf) : passwd_len)) + goto err; + if (!EVP_DigestFinal_ex(md2, buf, NULL)) + goto err; } - EVP_MD_CTX_cleanup(&md2); + EVP_MD_CTX_free(md2); + EVP_MD_CTX_free(md); + md2 = NULL; + md = NULL; { /* transform buf into output string */ - unsigned char buf_perm[sizeof(buf)]; int dest, source; char *output; @@ -367,15 +448,15 @@ static char *md5crypt(const char *passwd, const char *magic, const char *salt) buf_perm[dest] = buf[source]; buf_perm[14] = buf[5]; buf_perm[15] = buf[11]; -# ifndef PEDANTIC /* Unfortunately, this generates a "no +# ifndef PEDANTIC /* Unfortunately, this generates a "no * effect" warning */ assert(16 == sizeof(buf_perm)); -# endif +# endif output = salt_out + salt_len; assert(output == out_buf + strlen(out_buf)); - *output++ = '$'; + *output++ = ascii_dollar[0]; for (i = 0; i < 15; i += 3) { *output++ = cov_2char[buf_perm[i + 2] & 0x3f]; @@ -390,17 +471,309 @@ static char *md5crypt(const char *passwd, const char *magic, const char *salt) *output++ = cov_2char[buf_perm[i] >> 6]; *output = 0; assert(strlen(out_buf) < sizeof(out_buf)); +#ifdef CHARSET_EBCDIC + ascii2ebcdic(out_buf, out_buf, strlen(out_buf)); +#endif } - EVP_MD_CTX_cleanup(&md); return out_buf; + + err: + OPENSSL_free(ascii_passwd); + EVP_MD_CTX_free(md2); + EVP_MD_CTX_free(md); + return NULL; +} + +/* + * SHA based password algorithm, describe by Ulrich Drepper here: + * https://www.akkadia.org/drepper/SHA-crypt.txt + * (note that it's in the public domain) + */ +static char *shacrypt(const char *passwd, const char *magic, const char *salt) +{ + /* Prefix for optional rounds specification. */ + static const char rounds_prefix[] = "rounds="; + /* Maximum salt string length. */ +# define SALT_LEN_MAX 16 + /* Default number of rounds if not explicitly specified. */ +# define ROUNDS_DEFAULT 5000 + /* Minimum number of rounds. */ +# define ROUNDS_MIN 1000 + /* Maximum number of rounds. */ +# define ROUNDS_MAX 999999999 + + /* "$6$rounds=<N>$......salt......$...shahash(up to 86 chars)...\0" */ + static char out_buf[3 + 17 + 17 + 86 + 1]; + unsigned char buf[SHA512_DIGEST_LENGTH]; + unsigned char temp_buf[SHA512_DIGEST_LENGTH]; + size_t buf_size = 0; + char ascii_magic[2]; + char ascii_salt[17]; /* Max 16 chars plus '\0' */ + char *ascii_passwd = NULL; + size_t n; + EVP_MD_CTX *md = NULL, *md2 = NULL; + const EVP_MD *sha = NULL; + size_t passwd_len, salt_len, magic_len; + unsigned int rounds = 5000; /* Default */ + char rounds_custom = 0; + char *p_bytes = NULL; + char *s_bytes = NULL; + char *cp = NULL; + + passwd_len = strlen(passwd); + magic_len = strlen(magic); + + /* assert it's "5" or "6" */ + if (magic_len != 1) + return NULL; + + switch (magic[0]) { + case '5': + sha = EVP_sha256(); + buf_size = 32; + break; + case '6': + sha = EVP_sha512(); + buf_size = 64; + break; + default: + return NULL; + } + + if (strncmp(salt, rounds_prefix, sizeof(rounds_prefix) - 1) == 0) { + const char *num = salt + sizeof(rounds_prefix) - 1; + char *endp; + unsigned long int srounds = strtoul (num, &endp, 10); + if (*endp == '$') { + salt = endp + 1; + if (srounds > ROUNDS_MAX) + rounds = ROUNDS_MAX; + else if (srounds < ROUNDS_MIN) + rounds = ROUNDS_MIN; + else + rounds = (unsigned int)srounds; + rounds_custom = 1; + } else { + return NULL; + } + } + + OPENSSL_strlcpy(ascii_magic, magic, sizeof(ascii_magic)); +#ifdef CHARSET_EBCDIC + if ((magic[0] & 0x80) != 0) /* High bit is 1 in EBCDIC alnums */ + ebcdic2ascii(ascii_magic, ascii_magic, magic_len); +#endif + + /* The salt gets truncated to 16 chars */ + OPENSSL_strlcpy(ascii_salt, salt, sizeof(ascii_salt)); + salt_len = strlen(ascii_salt); +#ifdef CHARSET_EBCDIC + ebcdic2ascii(ascii_salt, ascii_salt, salt_len); +#endif + +#ifdef CHARSET_EBCDIC + ascii_passwd = OPENSSL_strdup(passwd); + if (ascii_passwd == NULL) + return NULL; + ebcdic2ascii(ascii_passwd, ascii_passwd, passwd_len); + passwd = ascii_passwd; +#endif + + out_buf[0] = 0; + OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf)); + OPENSSL_strlcat(out_buf, ascii_magic, sizeof(out_buf)); + OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf)); + if (rounds_custom) { + char tmp_buf[80]; /* "rounds=999999999" */ + sprintf(tmp_buf, "rounds=%u", rounds); +#ifdef CHARSET_EBCDIC + /* In case we're really on a ASCII based platform and just pretend */ + if (tmp_buf[0] != 0x72) /* ASCII 'r' */ + ebcdic2ascii(tmp_buf, tmp_buf, strlen(tmp_buf)); +#endif + OPENSSL_strlcat(out_buf, tmp_buf, sizeof(out_buf)); + OPENSSL_strlcat(out_buf, ascii_dollar, sizeof(out_buf)); + } + OPENSSL_strlcat(out_buf, ascii_salt, sizeof(out_buf)); + + /* assert "$5$rounds=999999999$......salt......" */ + if (strlen(out_buf) > 3 + 17 * rounds_custom + salt_len ) + goto err; + + md = EVP_MD_CTX_new(); + if (md == NULL + || !EVP_DigestInit_ex(md, sha, NULL) + || !EVP_DigestUpdate(md, passwd, passwd_len) + || !EVP_DigestUpdate(md, ascii_salt, salt_len)) + goto err; + + md2 = EVP_MD_CTX_new(); + if (md2 == NULL + || !EVP_DigestInit_ex(md2, sha, NULL) + || !EVP_DigestUpdate(md2, passwd, passwd_len) + || !EVP_DigestUpdate(md2, ascii_salt, salt_len) + || !EVP_DigestUpdate(md2, passwd, passwd_len) + || !EVP_DigestFinal_ex(md2, buf, NULL)) + goto err; + + for (n = passwd_len; n > buf_size; n -= buf_size) { + if (!EVP_DigestUpdate(md, buf, buf_size)) + goto err; + } + if (!EVP_DigestUpdate(md, buf, n)) + goto err; + + n = passwd_len; + while (n) { + if (!EVP_DigestUpdate(md, + (n & 1) ? buf : (unsigned const char *)passwd, + (n & 1) ? buf_size : passwd_len)) + goto err; + n >>= 1; + } + if (!EVP_DigestFinal_ex(md, buf, NULL)) + return NULL; + + /* P sequence */ + if (!EVP_DigestInit_ex(md2, sha, NULL)) + goto err; + + for (n = passwd_len; n > 0; n--) + if (!EVP_DigestUpdate(md2, passwd, passwd_len)) + goto err; + + if (!EVP_DigestFinal_ex(md2, temp_buf, NULL)) + return NULL; + + if ((p_bytes = OPENSSL_zalloc(passwd_len)) == NULL) + goto err; + for (cp = p_bytes, n = passwd_len; n > buf_size; n -= buf_size, cp += buf_size) + memcpy(cp, temp_buf, buf_size); + memcpy(cp, temp_buf, n); + + /* S sequence */ + if (!EVP_DigestInit_ex(md2, sha, NULL)) + goto err; + + for (n = 16 + buf[0]; n > 0; n--) + if (!EVP_DigestUpdate(md2, ascii_salt, salt_len)) + goto err; + + if (!EVP_DigestFinal_ex(md2, temp_buf, NULL)) + return NULL; + + if ((s_bytes = OPENSSL_zalloc(salt_len)) == NULL) + goto err; + for (cp = s_bytes, n = salt_len; n > buf_size; n -= buf_size, cp += buf_size) + memcpy(cp, temp_buf, buf_size); + memcpy(cp, temp_buf, n); + + for (n = 0; n < rounds; n++) { + if (!EVP_DigestInit_ex(md2, sha, NULL)) + goto err; + if (!EVP_DigestUpdate(md2, + (n & 1) ? (unsigned const char *)p_bytes : buf, + (n & 1) ? passwd_len : buf_size)) + goto err; + if (n % 3) { + if (!EVP_DigestUpdate(md2, s_bytes, salt_len)) + goto err; + } + if (n % 7) { + if (!EVP_DigestUpdate(md2, p_bytes, passwd_len)) + goto err; + } + if (!EVP_DigestUpdate(md2, + (n & 1) ? buf : (unsigned const char *)p_bytes, + (n & 1) ? buf_size : passwd_len)) + goto err; + if (!EVP_DigestFinal_ex(md2, buf, NULL)) + goto err; + } + EVP_MD_CTX_free(md2); + EVP_MD_CTX_free(md); + md2 = NULL; + md = NULL; + OPENSSL_free(p_bytes); + OPENSSL_free(s_bytes); + p_bytes = NULL; + s_bytes = NULL; + + cp = out_buf + strlen(out_buf); + *cp++ = ascii_dollar[0]; + +# define b64_from_24bit(B2, B1, B0, N) \ + do { \ + unsigned int w = ((B2) << 16) | ((B1) << 8) | (B0); \ + int i = (N); \ + while (i-- > 0) \ + { \ + *cp++ = cov_2char[w & 0x3f]; \ + w >>= 6; \ + } \ + } while (0) + + switch (magic[0]) { + case '5': + b64_from_24bit (buf[0], buf[10], buf[20], 4); + b64_from_24bit (buf[21], buf[1], buf[11], 4); + b64_from_24bit (buf[12], buf[22], buf[2], 4); + b64_from_24bit (buf[3], buf[13], buf[23], 4); + b64_from_24bit (buf[24], buf[4], buf[14], 4); + b64_from_24bit (buf[15], buf[25], buf[5], 4); + b64_from_24bit (buf[6], buf[16], buf[26], 4); + b64_from_24bit (buf[27], buf[7], buf[17], 4); + b64_from_24bit (buf[18], buf[28], buf[8], 4); + b64_from_24bit (buf[9], buf[19], buf[29], 4); + b64_from_24bit (0, buf[31], buf[30], 3); + break; + case '6': + b64_from_24bit (buf[0], buf[21], buf[42], 4); + b64_from_24bit (buf[22], buf[43], buf[1], 4); + b64_from_24bit (buf[44], buf[2], buf[23], 4); + b64_from_24bit (buf[3], buf[24], buf[45], 4); + b64_from_24bit (buf[25], buf[46], buf[4], 4); + b64_from_24bit (buf[47], buf[5], buf[26], 4); + b64_from_24bit (buf[6], buf[27], buf[48], 4); + b64_from_24bit (buf[28], buf[49], buf[7], 4); + b64_from_24bit (buf[50], buf[8], buf[29], 4); + b64_from_24bit (buf[9], buf[30], buf[51], 4); + b64_from_24bit (buf[31], buf[52], buf[10], 4); + b64_from_24bit (buf[53], buf[11], buf[32], 4); + b64_from_24bit (buf[12], buf[33], buf[54], 4); + b64_from_24bit (buf[34], buf[55], buf[13], 4); + b64_from_24bit (buf[56], buf[14], buf[35], 4); + b64_from_24bit (buf[15], buf[36], buf[57], 4); + b64_from_24bit (buf[37], buf[58], buf[16], 4); + b64_from_24bit (buf[59], buf[17], buf[38], 4); + b64_from_24bit (buf[18], buf[39], buf[60], 4); + b64_from_24bit (buf[40], buf[61], buf[19], 4); + b64_from_24bit (buf[62], buf[20], buf[41], 4); + b64_from_24bit (0, 0, buf[63], 2); + break; + default: + goto err; + } + *cp = '\0'; +#ifdef CHARSET_EBCDIC + ascii2ebcdic(out_buf, out_buf, strlen(out_buf)); +#endif + + return out_buf; + + err: + EVP_MD_CTX_free(md2); + EVP_MD_CTX_free(md); + OPENSSL_free(p_bytes); + OPENSSL_free(s_bytes); + OPENSSL_free(ascii_passwd); + return NULL; } -# 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) + int reverse, size_t pw_maxlen, passwd_modes mode) { char *hash = NULL; @@ -409,42 +782,34 @@ static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p, /* 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_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 */ + size_t saltlen = 0; + size_t i; -# ifndef NO_MD5CRYPT_1 - if (use1 || useapr1) { - int i; +#ifndef OPENSSL_NO_DES + if (mode == passwd_crypt) + saltlen = 2; +#endif /* !OPENSSL_NO_DES */ - if (*salt_malloc_p == NULL) { - *salt_p = *salt_malloc_p = OPENSSL_malloc(9); - if (*salt_malloc_p == NULL) - goto err; - } - if (RAND_bytes((unsigned char *)*salt_p, 8) <= 0) - goto err; + if (mode == passwd_md5 || mode == passwd_apr1 || mode == passwd_aixmd5) + saltlen = 8; - 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 */ + if (mode == passwd_sha256 || mode == passwd_sha512) + saltlen = 16; + + assert(saltlen != 0); + + if (*salt_malloc_p == NULL) + *salt_p = *salt_malloc_p = app_malloc(saltlen + 1, "salt buffer"); + if (RAND_bytes((unsigned char *)*salt_p, saltlen) <= 0) + goto end; + + for (i = 0; i < saltlen; i++) + (*salt_p)[i] = cov_2char[(*salt_p)[i] & 0x3f]; /* 6 bits */ + (*salt_p)[i] = 0; +# ifdef CHARSET_EBCDIC + /* The password encryption funtion will convert back to ASCII */ + ascii2ebcdic(*salt_p, *salt_p, saltlen); +# endif } assert(*salt_p != NULL); @@ -463,14 +828,16 @@ static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p, assert(strlen(passwd) <= pw_maxlen); /* now compute password hash */ -# ifndef OPENSSL_NO_DES - if (usecrypt) +#ifndef OPENSSL_NO_DES + if (mode == passwd_crypt) hash = DES_crypt(passwd, *salt_p); -# endif -# ifndef NO_MD5CRYPT_1 - if (use1 || useapr1) - hash = md5crypt(passwd, (use1 ? "1" : "apr1"), *salt_p); -# endif +#endif + if (mode == passwd_md5 || mode == passwd_apr1) + hash = md5crypt(passwd, (mode == passwd_md5 ? "1" : "apr1"), *salt_p); + if (mode == passwd_aixmd5) + hash = md5crypt(passwd, "", *salt_p); + if (mode == passwd_sha256 || mode == passwd_sha512) + hash = shacrypt(passwd, (mode == passwd_sha256 ? "5" : "6"), *salt_p); assert(hash != NULL); if (table && !reverse) @@ -481,14 +848,6 @@ static int do_passwd(int passed_salt, char **salt_p, char **salt_malloc_p, BIO_printf(out, "%s\n", hash); return 1; - err: + end: return 0; } -#else - -int MAIN(int argc, char **argv) -{ - fputs("Program not available.\n", stderr) - OPENSSL_EXIT(1); -} -#endif |