mirror of https://github.com/hashcat/hashcat.git
Fist0urs
5 years ago
parent
4653447dfa
commit
afb010870a
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Load Diff
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/**
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* Author......: See docs/credits.txt
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* License.....: MIT
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*/
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#include "common.h"
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#include "types.h"
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#include "modules.h"
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#include "bitops.h"
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#include "convert.h"
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#include "shared.h"
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static const u32 ATTACK_EXEC = ATTACK_EXEC_OUTSIDE_KERNEL;
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static const u32 DGST_POS0 = 0;
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static const u32 DGST_POS1 = 1;
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static const u32 DGST_POS2 = 2;
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static const u32 DGST_POS3 = 3;
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static const u32 DGST_SIZE = DGST_SIZE_4_4;
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static const u32 HASH_CATEGORY = HASH_CATEGORY_NETWORK_PROTOCOL;
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static const char *HASH_NAME = "Kerberos 5 TGS-REP etype 17 (AES128-CTS-HMAC-SHA1-96)";
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static const u64 KERN_TYPE = 19600;
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static const u32 OPTI_TYPE = OPTI_TYPE_ZERO_BYTE
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| OPTI_TYPE_NOT_ITERATED
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| OPTI_TYPE_SLOW_HASH_SIMD_LOOP;
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static const u64 OPTS_TYPE = OPTS_TYPE_PT_GENERATE_LE;
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static const u32 SALT_TYPE = SALT_TYPE_EMBEDDED;
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static const char *ST_PASS = "hashcat";
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static const char *ST_HASH = "$krb5tgs$17$srv_http$synacktiv.local$849e31b3db1c1f203fa20b85$948690f5875125348286ad3346d27b43eaabc71896b620c16de7ddcdbd561628c650c508856a3f574261948b6db4b48332d30536e978046a423ad4368f9a69b4dc4642dab4e0d475d8299be718fd6f98ac85a771b457b2453e78c9411dfce572b19660fe7a5a8246d9b2a91ea2f14d1986ea0a77ecf9b8330bc8fd9ab540bcf46b74c5aa7005cfccd89ec05f66aeab30c6b2bf8595cf6c9a1b68ad885258850c4b1dd9265f270fb2af52fd76c16246df51ea67efc58a65c345686c84e43642febe908a";
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u32 module_attack_exec (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ATTACK_EXEC; }
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u32 module_dgst_pos0 (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return DGST_POS0; }
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u32 module_dgst_pos1 (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return DGST_POS1; }
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u32 module_dgst_pos2 (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return DGST_POS2; }
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u32 module_dgst_pos3 (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return DGST_POS3; }
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u32 module_dgst_size (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return DGST_SIZE; }
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u32 module_hash_category (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return HASH_CATEGORY; }
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const char *module_hash_name (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return HASH_NAME; }
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u64 module_kern_type (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return KERN_TYPE; }
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u32 module_opti_type (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return OPTI_TYPE; }
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u64 module_opts_type (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return OPTS_TYPE; }
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u32 module_salt_type (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return SALT_TYPE; }
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const char *module_st_hash (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ST_HASH; }
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const char *module_st_pass (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ST_PASS; }
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typedef struct krb5tgs_17
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{
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u32 user[128];
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u32 domain[128];
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u32 account_info[512];
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u32 account_info_len;
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u32 checksum[3];
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u32 edata2[5120];
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u32 edata2_len;
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} krb5tgs_17_t;
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typedef struct krb5tgs_17_tmp
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{
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u32 ipad[5];
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u32 opad[5];
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u32 dgst[10];
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u32 out[10];
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} krb5tgs_17_tmp_t;
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static const char *SIGNATURE_KRB5TGS = "$krb5tgs$17$";
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u64 module_tmp_size (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra)
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{
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const u64 tmp_size = (const u64) sizeof (krb5tgs_17_tmp_t);
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return tmp_size;
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}
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u64 module_esalt_size (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra)
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{
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const u64 esalt_size = (const u64) sizeof (krb5tgs_17_t);
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return esalt_size;
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}
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int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED void *digest_buf, MAYBE_UNUSED salt_t *salt, MAYBE_UNUSED void *esalt_buf, MAYBE_UNUSED void *hook_salt_buf, MAYBE_UNUSED hashinfo_t *hash_info, const char *line_buf, MAYBE_UNUSED const int line_len)
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{
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u32 *digest = (u32 *) digest_buf;
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krb5tgs_17_t *krb5tgs = (krb5tgs_17_t *) esalt_buf;
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token_t token;
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token.signatures_cnt = 1;
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token.signatures_buf[0] = SIGNATURE_KRB5TGS;
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token.len[0] = 12;
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token.attr[0] = TOKEN_ATTR_FIXED_LENGTH
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| TOKEN_ATTR_VERIFY_SIGNATURE;
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/**
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* $krb5tgs$17$*user*realm*$checksum$edata2
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* $krb5tgs$17$*user*realm*spn*$checksum$edata2
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*/
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// assume no signature found
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if (line_len < 12) return (PARSER_SALT_LENGTH);
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char *spn_info_start = strchr ((const char *) line_buf + 12 + 1, '*');
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int is_spn_provided = 0;
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// assume $krb5tgs$17$user$realm$checksum$edata2
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if (spn_info_start == NULL)
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{
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token.token_cnt = 5;
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token.sep[1] = '$';
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token.len_min[1] = 1;
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token.len_max[1] = 512;
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token.attr[1] = TOKEN_ATTR_VERIFY_LENGTH;
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token.sep[2] = '$';
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token.len_min[2] = 1;
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token.len_max[2] = 512;
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token.attr[2] = TOKEN_ATTR_VERIFY_LENGTH;
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token.sep[3] = '$';
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// hmac-sha1 stripped to 12bytes
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token.len_min[3] = 24;
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token.len_max[3] = 24;
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token.attr[3] = TOKEN_ATTR_VERIFY_LENGTH
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| TOKEN_ATTR_VERIFY_HEX;
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token.sep[4] = '$';
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token.len_min[4] = 64;
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token.len_max[4] = 40960;
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token.attr[4] = TOKEN_ATTR_VERIFY_LENGTH
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| TOKEN_ATTR_VERIFY_HEX;
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}
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// assume $krb5tgs$17$user$realm$*spn*$checksum$edata2
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else
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{
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char *spn_info_stop = strchr ((const char *) spn_info_start + 1, '*');
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if (spn_info_stop == NULL) return (PARSER_SEPARATOR_UNMATCHED);
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spn_info_stop++; // we want the * $char included
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spn_info_stop++; // we want the $ char included
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const int spn_info_len = spn_info_stop - spn_info_start;
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token.token_cnt = 6;
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token.sep[1] = '$';
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token.len_min[1] = 1;
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token.len_max[1] = 512;
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token.attr[1] = TOKEN_ATTR_VERIFY_LENGTH;
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token.sep[2] = '$';
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token.len_min[2] = 1;
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token.len_max[2] = 512;
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token.attr[2] = TOKEN_ATTR_VERIFY_LENGTH;
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token.len[3] = spn_info_len;
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token.attr[3] = TOKEN_ATTR_FIXED_LENGTH;
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token.sep[4] = '$';
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token.len_min[4] = 24;
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token.len_max[4] = 24;
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token.attr[4] = TOKEN_ATTR_VERIFY_LENGTH
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| TOKEN_ATTR_VERIFY_HEX;
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token.sep[5] = '$';
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token.len_min[5] = 64;
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token.len_max[5] = 40960;
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token.attr[5] = TOKEN_ATTR_VERIFY_LENGTH
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| TOKEN_ATTR_VERIFY_HEX;
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is_spn_provided = 1;
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}
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const int rc_tokenizer = input_tokenizer ((const u8 *) line_buf, line_len, &token);
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if (rc_tokenizer != PARSER_OK) return (rc_tokenizer);
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const u8 *user_pos;
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const u8 *domain_pos;
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const u8 *checksum_pos;
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const u8 *data_pos;
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int user_len;
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int domain_len;
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int data_len;
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int account_info_len;
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user_pos = token.buf[1];
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user_len = token.len[1];
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memcpy(krb5tgs->user, user_pos, user_len);
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domain_pos = token.buf[2];
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domain_len = token.len[2];
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memcpy(krb5tgs->domain, domain_pos, domain_len);
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checksum_pos = token.buf[3 + is_spn_provided];
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data_pos = token.buf[4 + is_spn_provided];
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data_len = token.len[4 + is_spn_provided];
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account_info_len = token.len[2] + token.len[1];
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u8 *account_info_ptr = (u8 *) krb5tgs->account_info;
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// domain must be uppercase
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u8 domain[128];
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memcpy(domain, domain_pos, domain_len);
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uppercase(domain, domain_len);
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memcpy(account_info_ptr, domain, domain_len);
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memcpy(account_info_ptr + domain_len, user_pos, user_len);
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krb5tgs->account_info_len = account_info_len;
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// hmac-sha1 is reduced to 12 bytes
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krb5tgs->checksum[0] = byte_swap_32 (hex_to_u32 (checksum_pos + 0));
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krb5tgs->checksum[1] = byte_swap_32 (hex_to_u32 (checksum_pos + 8));
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krb5tgs->checksum[2] = byte_swap_32 (hex_to_u32 (checksum_pos + 16));
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u8 *edata_ptr = (u8 *) krb5tgs->edata2;
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for (int i = 0; i < data_len; i += 2)
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{
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const u8 p0 = data_pos[i + 0];
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const u8 p1 = data_pos[i + 1];
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*edata_ptr++ = hex_convert (p1) << 0
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| hex_convert (p0) << 4;
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}
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krb5tgs->edata2_len = data_len / 2;
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salt->salt_buf[0] = krb5tgs->checksum[0];
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salt->salt_buf[1] = krb5tgs->checksum[1];
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salt->salt_buf[2] = krb5tgs->checksum[2];
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salt->salt_iter = 4096 - 1;
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digest[0] = krb5tgs->checksum[0];
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digest[1] = krb5tgs->checksum[1];
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digest[2] = krb5tgs->checksum[2];
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digest[3] = 0;
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return (PARSER_OK);
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}
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int module_hash_encode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const void *digest_buf, MAYBE_UNUSED const salt_t *salt, MAYBE_UNUSED const void *esalt_buf, MAYBE_UNUSED const void *hook_salt_buf, MAYBE_UNUSED const hashinfo_t *hash_info, char *line_buf, MAYBE_UNUSED const int line_size)
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{
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const u32 *digest = (const u32 *) digest_buf;
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const krb5tgs_17_t *krb5tgs = (const krb5tgs_17_t *) esalt_buf;
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char data[5120 * 4 * 2] = { 0 };
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for (u32 i = 0, j = 0; i < krb5tgs->edata2_len; i += 1, j += 2)
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{
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u8 *ptr_edata2 = (u8 *) krb5tgs->edata2;
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sprintf (data + j, "%02x", ptr_edata2[i]);
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}
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const int line_len = snprintf (line_buf, line_size, "%s%s$%s$%08x%08x%08x$%s",
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SIGNATURE_KRB5TGS,
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(char *) krb5tgs->user,
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(char *) krb5tgs->domain,
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krb5tgs->checksum[0],
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krb5tgs->checksum[1],
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krb5tgs->checksum[2],
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data);
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return line_len;
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}
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void module_init (module_ctx_t *module_ctx)
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{
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module_ctx->module_context_size = MODULE_CONTEXT_SIZE_CURRENT;
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module_ctx->module_interface_version = MODULE_INTERFACE_VERSION_CURRENT;
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module_ctx->module_attack_exec = module_attack_exec;
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module_ctx->module_benchmark_esalt = MODULE_DEFAULT;
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module_ctx->module_benchmark_hook_salt = MODULE_DEFAULT;
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module_ctx->module_benchmark_mask = MODULE_DEFAULT;
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module_ctx->module_benchmark_salt = MODULE_DEFAULT;
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module_ctx->module_build_plain_postprocess = MODULE_DEFAULT;
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module_ctx->module_deep_comp_kernel = MODULE_DEFAULT;
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module_ctx->module_dgst_pos0 = module_dgst_pos0;
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module_ctx->module_dgst_pos1 = module_dgst_pos1;
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module_ctx->module_dgst_pos2 = module_dgst_pos2;
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module_ctx->module_dgst_pos3 = module_dgst_pos3;
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module_ctx->module_dgst_size = module_dgst_size;
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module_ctx->module_dictstat_disable = MODULE_DEFAULT;
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module_ctx->module_esalt_size = module_esalt_size;
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module_ctx->module_extra_buffer_size = MODULE_DEFAULT;
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module_ctx->module_extra_tmp_size = MODULE_DEFAULT;
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module_ctx->module_forced_outfile_format = MODULE_DEFAULT;
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module_ctx->module_hash_binary_count = MODULE_DEFAULT;
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module_ctx->module_hash_binary_parse = MODULE_DEFAULT;
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module_ctx->module_hash_binary_save = MODULE_DEFAULT;
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module_ctx->module_hash_decode_outfile = MODULE_DEFAULT;
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module_ctx->module_hash_decode_zero_hash = MODULE_DEFAULT;
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module_ctx->module_hash_decode = module_hash_decode;
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module_ctx->module_hash_encode_status = MODULE_DEFAULT;
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module_ctx->module_hash_encode = module_hash_encode;
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module_ctx->module_hash_init_selftest = MODULE_DEFAULT;
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module_ctx->module_hash_mode = MODULE_DEFAULT;
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module_ctx->module_hash_category = module_hash_category;
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module_ctx->module_hash_name = module_hash_name;
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module_ctx->module_hlfmt_disable = MODULE_DEFAULT;
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module_ctx->module_hook12 = MODULE_DEFAULT;
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module_ctx->module_hook23 = MODULE_DEFAULT;
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module_ctx->module_hook_salt_size = MODULE_DEFAULT;
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module_ctx->module_hook_size = MODULE_DEFAULT;
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module_ctx->module_jit_build_options = MODULE_DEFAULT;
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module_ctx->module_jit_cache_disable = MODULE_DEFAULT;
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module_ctx->module_kernel_accel_max = MODULE_DEFAULT;
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module_ctx->module_kernel_accel_min = MODULE_DEFAULT;
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module_ctx->module_kernel_loops_max = MODULE_DEFAULT;
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module_ctx->module_kernel_loops_min = MODULE_DEFAULT;
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module_ctx->module_kernel_threads_max = MODULE_DEFAULT;
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module_ctx->module_kernel_threads_min = MODULE_DEFAULT;
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module_ctx->module_kern_type = module_kern_type;
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module_ctx->module_kern_type_dynamic = MODULE_DEFAULT;
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module_ctx->module_opti_type = module_opti_type;
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module_ctx->module_opts_type = module_opts_type;
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module_ctx->module_outfile_check_disable = MODULE_DEFAULT;
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module_ctx->module_outfile_check_nocomp = MODULE_DEFAULT;
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module_ctx->module_potfile_disable = MODULE_DEFAULT;
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module_ctx->module_potfile_keep_all_hashes = MODULE_DEFAULT;
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module_ctx->module_pwdump_column = MODULE_DEFAULT;
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module_ctx->module_pw_max = MODULE_DEFAULT;
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module_ctx->module_pw_min = MODULE_DEFAULT;
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module_ctx->module_salt_max = MODULE_DEFAULT;
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module_ctx->module_salt_min = MODULE_DEFAULT;
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module_ctx->module_salt_type = module_salt_type;
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module_ctx->module_separator = MODULE_DEFAULT;
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module_ctx->module_st_hash = module_st_hash;
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module_ctx->module_st_pass = module_st_pass;
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module_ctx->module_tmp_size = module_tmp_size;
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module_ctx->module_unstable_warning = MODULE_DEFAULT;
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module_ctx->module_warmup_disable = MODULE_DEFAULT;
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}
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@ -0,0 +1,349 @@
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/**
|
||||
* Author......: See docs/credits.txt
|
||||
* License.....: MIT
|
||||
*/
|
||||
|
||||
#include "common.h"
|
||||
#include "types.h"
|
||||
#include "modules.h"
|
||||
#include "bitops.h"
|
||||
#include "convert.h"
|
||||
#include "shared.h"
|
||||
|
||||
static const u32 ATTACK_EXEC = ATTACK_EXEC_OUTSIDE_KERNEL;
|
||||
static const u32 DGST_POS0 = 0;
|
||||
static const u32 DGST_POS1 = 1;
|
||||
static const u32 DGST_POS2 = 2;
|
||||
static const u32 DGST_POS3 = 3;
|
||||
static const u32 DGST_SIZE = DGST_SIZE_4_4;
|
||||
static const u32 HASH_CATEGORY = HASH_CATEGORY_NETWORK_PROTOCOL;
|
||||
static const char *HASH_NAME = "Kerberos 5 TGS-REP etype 18 (AES256-CTS-HMAC-SHA1-96)";
|
||||
static const u64 KERN_TYPE = 19700;
|
||||
static const u32 OPTI_TYPE = OPTI_TYPE_ZERO_BYTE
|
||||
| OPTI_TYPE_NOT_ITERATED
|
||||
| OPTI_TYPE_SLOW_HASH_SIMD_LOOP;
|
||||
static const u64 OPTS_TYPE = OPTS_TYPE_PT_GENERATE_LE;
|
||||
static const u32 SALT_TYPE = SALT_TYPE_EMBEDDED;
|
||||
static const char *ST_PASS = "hashcat";
|
||||
static const char *ST_HASH = "$krb5tgs$18$srv_http$synacktiv.local$16ce51f6eba20c8ee534ff8a$57d07b23643a516834795f0c010da8f549b7e65063e5a367ca9240f9b800adad1734df7e7d5dd8307e785de4f40aacf901df41aa6ce695f8619ec579c1fa57ee93661cf402aeef4e3a42e7e3477645d52c09dc72feade03512dffe0df517344f673c63532b790c242cc1d50f4b4b34976cb6e08ab325b3aefb2684262a5ee9faacb14d059754f50553be5bfa5c4c51e833ff2b6ac02c6e5d4c4eb193e27d7dde301bd1ddf480e5e282b8c27ef37b136c8f140b56de105b73adeb1de16232fa1ab5c9f6";
|
||||
|
||||
u32 module_attack_exec (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ATTACK_EXEC; }
|
||||
u32 module_dgst_pos0 (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return DGST_POS0; }
|
||||
u32 module_dgst_pos1 (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return DGST_POS1; }
|
||||
u32 module_dgst_pos2 (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return DGST_POS2; }
|
||||
u32 module_dgst_pos3 (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return DGST_POS3; }
|
||||
u32 module_dgst_size (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return DGST_SIZE; }
|
||||
u32 module_hash_category (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return HASH_CATEGORY; }
|
||||
const char *module_hash_name (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return HASH_NAME; }
|
||||
u64 module_kern_type (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return KERN_TYPE; }
|
||||
u32 module_opti_type (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return OPTI_TYPE; }
|
||||
u64 module_opts_type (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return OPTS_TYPE; }
|
||||
u32 module_salt_type (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return SALT_TYPE; }
|
||||
const char *module_st_hash (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ST_HASH; }
|
||||
const char *module_st_pass (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra) { return ST_PASS; }
|
||||
|
||||
typedef struct krb5tgs_18
|
||||
{
|
||||
u32 user[128];
|
||||
u32 domain[128];
|
||||
u32 account_info[512];
|
||||
u32 account_info_len;
|
||||
|
||||
u32 checksum[3];
|
||||
u32 edata2[5120];
|
||||
u32 edata2_len;
|
||||
|
||||
} krb5tgs_18_t;
|
||||
|
||||
typedef struct krb5tgs_18_tmp
|
||||
{
|
||||
u32 ipad[5];
|
||||
u32 opad[5];
|
||||
u32 dgst[16];
|
||||
u32 out[16];
|
||||
|
||||
} krb5tgs_18_tmp_t;
|
||||
|
||||
static const char *SIGNATURE_KRB5TGS = "$krb5tgs$18$";
|
||||
|
||||
u64 module_tmp_size (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra)
|
||||
{
|
||||
const u64 tmp_size = (const u64) sizeof (krb5tgs_18_tmp_t);
|
||||
|
||||
return tmp_size;
|
||||
}
|
||||
|
||||
u64 module_esalt_size (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const user_options_t *user_options, MAYBE_UNUSED const user_options_extra_t *user_options_extra)
|
||||
{
|
||||
const u64 esalt_size = (const u64) sizeof (krb5tgs_18_t);
|
||||
|
||||
return esalt_size;
|
||||
}
|
||||
|
||||
int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED void *digest_buf, MAYBE_UNUSED salt_t *salt, MAYBE_UNUSED void *esalt_buf, MAYBE_UNUSED void *hook_salt_buf, MAYBE_UNUSED hashinfo_t *hash_info, const char *line_buf, MAYBE_UNUSED const int line_len)
|
||||
{
|
||||
u32 *digest = (u32 *) digest_buf;
|
||||
|
||||
krb5tgs_18_t *krb5tgs = (krb5tgs_18_t *) esalt_buf;
|
||||
|
||||
token_t token;
|
||||
|
||||
token.signatures_cnt = 1;
|
||||
token.signatures_buf[0] = SIGNATURE_KRB5TGS;
|
||||
|
||||
token.len[0] = 12;
|
||||
token.attr[0] = TOKEN_ATTR_FIXED_LENGTH
|
||||
| TOKEN_ATTR_VERIFY_SIGNATURE;
|
||||
|
||||
/**
|
||||
* $krb5tgs$18$*user*realm*$checksum$edata2
|
||||
* $krb5tgs$18$*user*realm*spn*$checksum$edata2
|
||||
*/
|
||||
|
||||
// assume no signature found
|
||||
if (line_len < 12) return (PARSER_SALT_LENGTH);
|
||||
|
||||
char *spn_info_start = strchr ((const char *) line_buf + 12 + 1, '*');
|
||||
|
||||
int is_spn_provided = 0;
|
||||
|
||||
// assume $krb5tgs$17$user$realm$checksum$edata2
|
||||
if (spn_info_start == NULL)
|
||||
{
|
||||
token.token_cnt = 5;
|
||||
|
||||
token.sep[1] = '$';
|
||||
token.len_min[1] = 1;
|
||||
token.len_max[1] = 512;
|
||||
token.attr[1] = TOKEN_ATTR_VERIFY_LENGTH;
|
||||
|
||||
token.sep[2] = '$';
|
||||
token.len_min[2] = 1;
|
||||
token.len_max[2] = 512;
|
||||
token.attr[2] = TOKEN_ATTR_VERIFY_LENGTH;
|
||||
|
||||
token.sep[3] = '$';
|
||||
// hmac-sha1 stripped to 12bytes
|
||||
token.len_min[3] = 24;
|
||||
token.len_max[3] = 24;
|
||||
token.attr[3] = TOKEN_ATTR_VERIFY_LENGTH
|
||||
| TOKEN_ATTR_VERIFY_HEX;
|
||||
|
||||
token.sep[4] = '$';
|
||||
token.len_min[4] = 64;
|
||||
token.len_max[4] = 40960;
|
||||
token.attr[4] = TOKEN_ATTR_VERIFY_LENGTH
|
||||
| TOKEN_ATTR_VERIFY_HEX;
|
||||
}
|
||||
// assume $krb5tgs$18$user$realm$*spn*$checksum$edata2
|
||||
else
|
||||
{
|
||||
char *spn_info_stop = strchr ((const char *) spn_info_start + 1, '*');
|
||||
|
||||
if (spn_info_stop == NULL) return (PARSER_SEPARATOR_UNMATCHED);
|
||||
|
||||
spn_info_stop++; // we want the * $char included
|
||||
spn_info_stop++; // we want the $ char included
|
||||
|
||||
const int spn_info_len = spn_info_stop - spn_info_start;
|
||||
|
||||
token.token_cnt = 6;
|
||||
|
||||
token.sep[1] = '$';
|
||||
token.len_min[1] = 1;
|
||||
token.len_max[1] = 512;
|
||||
token.attr[1] = TOKEN_ATTR_VERIFY_LENGTH;
|
||||
|
||||
token.sep[2] = '$';
|
||||
token.len_min[2] = 1;
|
||||
token.len_max[2] = 512;
|
||||
token.attr[2] = TOKEN_ATTR_VERIFY_LENGTH;
|
||||
|
||||
token.len[3] = spn_info_len;
|
||||
token.attr[3] = TOKEN_ATTR_FIXED_LENGTH;
|
||||
|
||||
token.sep[4] = '$';
|
||||
token.len_min[4] = 24;
|
||||
token.len_max[4] = 24;
|
||||
token.attr[4] = TOKEN_ATTR_VERIFY_LENGTH
|
||||
| TOKEN_ATTR_VERIFY_HEX;
|
||||
|
||||
token.sep[5] = '$';
|
||||
token.len_min[5] = 64;
|
||||
token.len_max[5] = 40960;
|
||||
token.attr[5] = TOKEN_ATTR_VERIFY_LENGTH
|
||||
| TOKEN_ATTR_VERIFY_HEX;
|
||||
|
||||
is_spn_provided = 1;
|
||||
}
|
||||
|
||||
const int rc_tokenizer = input_tokenizer ((const u8 *) line_buf, line_len, &token);
|
||||
|
||||
if (rc_tokenizer != PARSER_OK) return (rc_tokenizer);
|
||||
|
||||
const u8 *user_pos;
|
||||
const u8 *domain_pos;
|
||||
const u8 *checksum_pos;
|
||||
const u8 *data_pos;
|
||||
|
||||
int user_len;
|
||||
int domain_len;
|
||||
int data_len;
|
||||
int account_info_len;
|
||||
|
||||
user_pos = token.buf[1];
|
||||
user_len = token.len[1];
|
||||
|
||||
memcpy(krb5tgs->user, user_pos, user_len);
|
||||
|
||||
domain_pos = token.buf[2];
|
||||
domain_len = token.len[2];
|
||||
|
||||
memcpy(krb5tgs->domain, domain_pos, domain_len);
|
||||
|
||||
checksum_pos = token.buf[3 + is_spn_provided];
|
||||
|
||||
data_pos = token.buf[4 + is_spn_provided];
|
||||
data_len = token.len[4 + is_spn_provided];
|
||||
|
||||
account_info_len = token.len[2] + token.len[1];
|
||||
|
||||
u8 *account_info_ptr = (u8 *) krb5tgs->account_info;
|
||||
|
||||
// domain must be uppercase
|
||||
u8 domain[128];
|
||||
memcpy(domain, domain_pos, domain_len);
|
||||
uppercase(domain, domain_len);
|
||||
|
||||
memcpy(account_info_ptr, domain, domain_len);
|
||||
memcpy(account_info_ptr + domain_len, user_pos, user_len);
|
||||
|
||||
krb5tgs->account_info_len = account_info_len;
|
||||
|
||||
// hmac-sha1 is reduced to 12 bytes
|
||||
krb5tgs->checksum[0] = byte_swap_32 (hex_to_u32 (checksum_pos + 0));
|
||||
krb5tgs->checksum[1] = byte_swap_32 (hex_to_u32 (checksum_pos + 8));
|
||||
krb5tgs->checksum[2] = byte_swap_32 (hex_to_u32 (checksum_pos + 16));
|
||||
|
||||
u8 *edata_ptr = (u8 *) krb5tgs->edata2;
|
||||
|
||||
for (int i = 0; i < data_len; i += 2)
|
||||
{
|
||||
const u8 p0 = data_pos[i + 0];
|
||||
const u8 p1 = data_pos[i + 1];
|
||||
|
||||
*edata_ptr++ = hex_convert (p1) << 0
|
||||
| hex_convert (p0) << 4;
|
||||
}
|
||||
|
||||
krb5tgs->edata2_len = data_len / 2;
|
||||
|
||||
salt->salt_buf[0] = krb5tgs->checksum[0];
|
||||
salt->salt_buf[1] = krb5tgs->checksum[1];
|
||||
salt->salt_buf[2] = krb5tgs->checksum[2];
|
||||
|
||||
salt->salt_iter = 4096 - 1;
|
||||
|
||||
digest[0] = krb5tgs->checksum[0];
|
||||
digest[1] = krb5tgs->checksum[1];
|
||||
digest[2] = krb5tgs->checksum[2];
|
||||
digest[3] = 0;
|
||||
|
||||
return (PARSER_OK);
|
||||
}
|
||||
|
||||
int module_hash_encode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSED const void *digest_buf, MAYBE_UNUSED const salt_t *salt, MAYBE_UNUSED const void *esalt_buf, MAYBE_UNUSED const void *hook_salt_buf, MAYBE_UNUSED const hashinfo_t *hash_info, char *line_buf, MAYBE_UNUSED const int line_size)
|
||||
{
|
||||
const u32 *digest = (const u32 *) digest_buf;
|
||||
|
||||
const krb5tgs_18_t *krb5tgs = (const krb5tgs_18_t *) esalt_buf;
|
||||
|
||||
char data[5120 * 4 * 2] = { 0 };
|
||||
|
||||
for (u32 i = 0, j = 0; i < krb5tgs->edata2_len; i += 1, j += 2)
|
||||
{
|
||||
u8 *ptr_edata2 = (u8 *) krb5tgs->edata2;
|
||||
|
||||
sprintf (data + j, "%02x", ptr_edata2[i]);
|
||||
}
|
||||
|
||||
const int line_len = snprintf (line_buf, line_size, "%s%s$%s$%08x%08x%08x$%s",
|
||||
SIGNATURE_KRB5TGS,
|
||||
(char *) krb5tgs->user,
|
||||
(char *) krb5tgs->domain,
|
||||
krb5tgs->checksum[0],
|
||||
krb5tgs->checksum[1],
|
||||
krb5tgs->checksum[2],
|
||||
data);
|
||||
|
||||
return line_len;
|
||||
}
|
||||
|
||||
void module_init (module_ctx_t *module_ctx)
|
||||
{
|
||||
module_ctx->module_context_size = MODULE_CONTEXT_SIZE_CURRENT;
|
||||
module_ctx->module_interface_version = MODULE_INTERFACE_VERSION_CURRENT;
|
||||
|
||||
module_ctx->module_attack_exec = module_attack_exec;
|
||||
module_ctx->module_benchmark_esalt = MODULE_DEFAULT;
|
||||
module_ctx->module_benchmark_hook_salt = MODULE_DEFAULT;
|
||||
module_ctx->module_benchmark_mask = MODULE_DEFAULT;
|
||||
module_ctx->module_benchmark_salt = MODULE_DEFAULT;
|
||||
module_ctx->module_build_plain_postprocess = MODULE_DEFAULT;
|
||||
module_ctx->module_deep_comp_kernel = MODULE_DEFAULT;
|
||||
module_ctx->module_dgst_pos0 = module_dgst_pos0;
|
||||
module_ctx->module_dgst_pos1 = module_dgst_pos1;
|
||||
module_ctx->module_dgst_pos2 = module_dgst_pos2;
|
||||
module_ctx->module_dgst_pos3 = module_dgst_pos3;
|
||||
module_ctx->module_dgst_size = module_dgst_size;
|
||||
module_ctx->module_dictstat_disable = MODULE_DEFAULT;
|
||||
module_ctx->module_esalt_size = module_esalt_size;
|
||||
module_ctx->module_extra_buffer_size = MODULE_DEFAULT;
|
||||
module_ctx->module_extra_tmp_size = MODULE_DEFAULT;
|
||||
module_ctx->module_forced_outfile_format = MODULE_DEFAULT;
|
||||
module_ctx->module_hash_binary_count = MODULE_DEFAULT;
|
||||
module_ctx->module_hash_binary_parse = MODULE_DEFAULT;
|
||||
module_ctx->module_hash_binary_save = MODULE_DEFAULT;
|
||||
module_ctx->module_hash_decode_outfile = MODULE_DEFAULT;
|
||||
module_ctx->module_hash_decode_zero_hash = MODULE_DEFAULT;
|
||||
module_ctx->module_hash_decode = module_hash_decode;
|
||||
module_ctx->module_hash_encode_status = MODULE_DEFAULT;
|
||||
module_ctx->module_hash_encode = module_hash_encode;
|
||||
module_ctx->module_hash_init_selftest = MODULE_DEFAULT;
|
||||
module_ctx->module_hash_mode = MODULE_DEFAULT;
|
||||
module_ctx->module_hash_category = module_hash_category;
|
||||
module_ctx->module_hash_name = module_hash_name;
|
||||
module_ctx->module_hlfmt_disable = MODULE_DEFAULT;
|
||||
module_ctx->module_hook12 = MODULE_DEFAULT;
|
||||
module_ctx->module_hook23 = MODULE_DEFAULT;
|
||||
module_ctx->module_hook_salt_size = MODULE_DEFAULT;
|
||||
module_ctx->module_hook_size = MODULE_DEFAULT;
|
||||
module_ctx->module_jit_build_options = MODULE_DEFAULT;
|
||||
module_ctx->module_jit_cache_disable = MODULE_DEFAULT;
|
||||
module_ctx->module_kernel_accel_max = MODULE_DEFAULT;
|
||||
module_ctx->module_kernel_accel_min = MODULE_DEFAULT;
|
||||
module_ctx->module_kernel_loops_max = MODULE_DEFAULT;
|
||||
module_ctx->module_kernel_loops_min = MODULE_DEFAULT;
|
||||
module_ctx->module_kernel_threads_max = MODULE_DEFAULT;
|
||||
module_ctx->module_kernel_threads_min = MODULE_DEFAULT;
|
||||
module_ctx->module_kern_type = module_kern_type;
|
||||
module_ctx->module_kern_type_dynamic = MODULE_DEFAULT;
|
||||
module_ctx->module_opti_type = module_opti_type;
|
||||
module_ctx->module_opts_type = module_opts_type;
|
||||
module_ctx->module_outfile_check_disable = MODULE_DEFAULT;
|
||||
module_ctx->module_outfile_check_nocomp = MODULE_DEFAULT;
|
||||
module_ctx->module_potfile_disable = MODULE_DEFAULT;
|
||||
module_ctx->module_potfile_keep_all_hashes = MODULE_DEFAULT;
|
||||
module_ctx->module_pwdump_column = MODULE_DEFAULT;
|
||||
module_ctx->module_pw_max = MODULE_DEFAULT;
|
||||
module_ctx->module_pw_min = MODULE_DEFAULT;
|
||||
module_ctx->module_salt_max = MODULE_DEFAULT;
|
||||
module_ctx->module_salt_min = MODULE_DEFAULT;
|
||||
module_ctx->module_salt_type = module_salt_type;
|
||||
module_ctx->module_separator = MODULE_DEFAULT;
|
||||
module_ctx->module_st_hash = module_st_hash;
|
||||
module_ctx->module_st_pass = module_st_pass;
|
||||
module_ctx->module_tmp_size = module_tmp_size;
|
||||
module_ctx->module_unstable_warning = MODULE_DEFAULT;
|
||||
module_ctx->module_warmup_disable = MODULE_DEFAULT;
|
||||
}
|
||||
@ -0,0 +1,219 @@
|
||||
#!/usr/bin/env perl
|
||||
|
||||
##
|
||||
## Author......: See docs/credits.txt
|
||||
## License.....: MIT
|
||||
##
|
||||
|
||||
use strict;
|
||||
use warnings;
|
||||
|
||||
use Digest::SHA qw (hmac_sha1);
|
||||
use Crypt::Mode::CBC;
|
||||
use Crypt::PBKDF2;
|
||||
use Encode;
|
||||
use POSIX qw (strftime);
|
||||
|
||||
sub byte2hex
|
||||
{
|
||||
my $input = shift;
|
||||
return unpack ("H*", $input);
|
||||
}
|
||||
|
||||
sub hex2byte
|
||||
{
|
||||
my $input = shift;
|
||||
return pack ("H*", $input);
|
||||
}
|
||||
|
||||
sub pad
|
||||
{
|
||||
my $n = shift;
|
||||
my $size = shift;
|
||||
|
||||
return (~$n + 1) & ($size - 1);
|
||||
}
|
||||
|
||||
sub module_constraints { [[0, 256], [16, 16], [-1, -1], [-1, -1], [-1, -1]] }
|
||||
|
||||
sub module_generate_hash
|
||||
{
|
||||
my $word = shift;
|
||||
my $salt = shift;
|
||||
my $user = shift // "user";
|
||||
my $realm = shift // "realm";
|
||||
my $checksum = shift;
|
||||
my $edata2 = shift;
|
||||
|
||||
my $mysalt = uc $realm;
|
||||
$mysalt = $mysalt . $user;
|
||||
|
||||
# first we generate the 'seed'
|
||||
my $iter = 4096;
|
||||
my $pbkdf2 = Crypt::PBKDF2->new
|
||||
(
|
||||
hash_class => 'HMACSHA1',
|
||||
iterations => $iter,
|
||||
output_len => 16
|
||||
);
|
||||
|
||||
my $b_seed = $pbkdf2->PBKDF2 ($mysalt, $word);
|
||||
|
||||
# we can precompute this
|
||||
my $b_kerberos_nfolded = hex2byte('6b65726265726f737b9b5b2b93132b93');
|
||||
|
||||
my $b_iv = hex2byte('0' x 32);
|
||||
|
||||
# 'key_bytes' will be the AES key used to generate 'ki' (for final hmac-sha1)
|
||||
# and 'ke' (AES key to decrypt/encrypt the ticket)
|
||||
my $cbc = Crypt::Mode::CBC->new ('AES', 0);
|
||||
my $b_key_bytes = $cbc->encrypt ($b_kerberos_nfolded, $b_seed, $b_iv);
|
||||
|
||||
# precomputed stuff
|
||||
my $b_nfolded1 = hex2byte('62dc6e371a63a80958ac562b15404ac5');
|
||||
my $b_nfolded2 = hex2byte('b5b0582c14b6500aad56ab55aa80556a');
|
||||
|
||||
my $b_ki = $cbc->encrypt ($b_nfolded1, $b_key_bytes, $b_iv);
|
||||
my $b_ke = $cbc->encrypt ($b_nfolded2, $b_key_bytes, $b_iv);
|
||||
|
||||
my $cleartext_ticket = '6381b03081ada00703050050a00000a11b3019a003020117a1'.
|
||||
'12041058e0d77776e8b8e03991f2966939222aa2171b154d594b5242544553542e434f4e5'.
|
||||
'44f534f2e434f4da3133011a003020102a10a30081b067472616e6365a40b3009a0030201'.
|
||||
'01a1020400a511180f32303136303231353134343735305aa611180f32303136303231353'.
|
||||
'134343735305aa711180f32303136303231363030343735305aa811180f32303136303232'.
|
||||
'323134343735305a';
|
||||
|
||||
if (defined $edata2)
|
||||
{
|
||||
my $len_last_block = length($edata2) % 32;
|
||||
|
||||
my $tmp = $len_last_block + 32;
|
||||
|
||||
my $b_truncated_enc_ticket = hex2byte (substr $edata2, 0, -$tmp);
|
||||
|
||||
my $b_last_block = hex2byte (substr $edata2, -$len_last_block);
|
||||
|
||||
my $b_n_1_block = hex2byte (substr(substr($edata2, -$tmp), 0, 32));
|
||||
|
||||
my $b_truncated_ticket_decrypted = $cbc->decrypt ($b_truncated_enc_ticket, $b_ke, $b_iv);
|
||||
|
||||
my $truncated_ticket_decrypted = byte2hex($b_truncated_ticket_decrypted);
|
||||
|
||||
my $check_correct = ((substr ($truncated_ticket_decrypted, 32, 4) eq "6381" && substr ($truncated_ticket_decrypted, 38, 2) eq "30") ||
|
||||
(substr ($truncated_ticket_decrypted, 32, 4) eq "6382")) &&
|
||||
((substr ($truncated_ticket_decrypted, 48, 6) eq "030500") ||
|
||||
(substr ($truncated_ticket_decrypted, 48, 8) eq "050307A0"));
|
||||
|
||||
if ($check_correct == 1)
|
||||
{
|
||||
my $b_n_2 = substr $b_truncated_enc_ticket, -16;
|
||||
|
||||
my $b_n_1_decrypted = $cbc->decrypt ($b_n_1_block, $b_ke, $b_iv);
|
||||
|
||||
my $b_last_plain = substr $b_n_1_decrypted, 0, $len_last_block/2;
|
||||
|
||||
$b_last_plain = $b_last_plain ^ $b_last_block;
|
||||
|
||||
my $omitted = substr $b_n_1_decrypted, -(16 - $len_last_block/2);
|
||||
|
||||
my $b_n_1 = $b_last_block . $omitted;
|
||||
|
||||
$b_n_1 = $cbc->decrypt ($b_n_1, $b_ke, $b_iv);
|
||||
|
||||
$b_n_1 = $b_n_1 ^ $b_n_2;
|
||||
|
||||
my $b_cleartext_ticket = $b_truncated_ticket_decrypted . $b_n_1 . $b_last_plain;
|
||||
|
||||
$cleartext_ticket = byte2hex($b_cleartext_ticket);
|
||||
}
|
||||
else # validation failed
|
||||
{
|
||||
# fake/wrong ticket (otherwise if we just decrypt/encrypt we end
|
||||
#up with false positives all the time)
|
||||
$cleartext_ticket = "0" x (length ($cleartext_ticket) + 32);
|
||||
}
|
||||
}
|
||||
|
||||
if (defined $checksum)
|
||||
{
|
||||
$checksum = pack ("H*", $checksum);
|
||||
}
|
||||
else
|
||||
{
|
||||
if (!defined $edata2)
|
||||
{
|
||||
my $nonce = unpack ("H*", random_bytes (16));
|
||||
|
||||
$cleartext_ticket = $nonce . $cleartext_ticket;
|
||||
}
|
||||
# we have what is required to compute checksum
|
||||
$checksum = hmac_sha1 (hex2byte($cleartext_ticket), $b_ki);
|
||||
|
||||
$checksum = substr $checksum, 0, 12;
|
||||
}
|
||||
|
||||
my $len_cleartext_last_block = length($cleartext_ticket) % 32;
|
||||
my $cleartext_last_block = substr $cleartext_ticket, -$len_cleartext_last_block;
|
||||
|
||||
my $padding = pad(length($cleartext_ticket), 32);
|
||||
|
||||
my $b_cleartext_last_block_padded = hex2byte($cleartext_last_block . '0' x $padding);
|
||||
|
||||
# we will encrypt until n-1 block (included)
|
||||
my $truncated_cleartext_ticket = substr $cleartext_ticket, 0, -$len_cleartext_last_block;
|
||||
|
||||
my $b_truncated_enc_ticket = $cbc->encrypt (hex2byte($truncated_cleartext_ticket), $b_ke, $b_iv);
|
||||
|
||||
my $b_enc_ticket_n_1_block= substr $b_truncated_enc_ticket, -16;
|
||||
|
||||
my $b_enc_last_block = substr $b_enc_ticket_n_1_block, 0, $len_cleartext_last_block/2;
|
||||
|
||||
# we now craft the new n-1 block
|
||||
my $tmp = $b_enc_ticket_n_1_block ^ $b_cleartext_last_block_padded;
|
||||
|
||||
$b_enc_ticket_n_1_block = $cbc->encrypt ($tmp, $b_ke, $b_iv);
|
||||
|
||||
$tmp = substr $b_truncated_enc_ticket, 0, -16;
|
||||
|
||||
$edata2 = $tmp . $b_enc_ticket_n_1_block . $b_enc_last_block;
|
||||
|
||||
my $tmp_hash = sprintf ('$krb5tgs$17$%s$%s$%s$%s', $user, $realm, unpack ("H*", $checksum), unpack ("H*", $edata2));
|
||||
|
||||
return $tmp_hash;
|
||||
}
|
||||
|
||||
sub module_verify_hash
|
||||
{
|
||||
my $line = shift;
|
||||
|
||||
my ($hash, $word) = split (':', $line);
|
||||
|
||||
return unless defined $hash;
|
||||
return unless defined $word;
|
||||
|
||||
my @data = split ('\$', $hash);
|
||||
|
||||
return unless scalar @data == 7;
|
||||
|
||||
shift @data;
|
||||
|
||||
my $signature = shift @data;
|
||||
my $algorithm = shift @data;
|
||||
my $user = shift @data;
|
||||
my $realm = shift @data;
|
||||
my $checksum = shift @data;
|
||||
my $edata2 = shift @data;
|
||||
|
||||
return unless ($signature eq "krb5tgs");
|
||||
return unless ($algorithm eq "17");
|
||||
return unless (length ($checksum) == 24);
|
||||
return unless (length ($edata2) >= 64);
|
||||
|
||||
my $word_packed = pack_if_HEX_notation ($word);
|
||||
|
||||
my $new_hash = module_generate_hash ($word_packed, undef, $user, $realm, $checksum, $edata2);
|
||||
|
||||
return ($new_hash, $word);
|
||||
}
|
||||
|
||||
1;
|
||||
@ -0,0 +1,234 @@
|
||||
#!/usr/bin/env perl
|
||||
|
||||
##
|
||||
## Author......: See docs/credits.txt
|
||||
## License.....: MIT
|
||||
##
|
||||
|
||||
use strict;
|
||||
use warnings;
|
||||
|
||||
use Digest::SHA qw (hmac_sha1);
|
||||
use Crypt::Mode::CBC;
|
||||
use Crypt::PBKDF2;
|
||||
use Encode;
|
||||
use POSIX qw (strftime);
|
||||
|
||||
sub byte2hex
|
||||
{
|
||||
my $input = shift;
|
||||
return unpack ("H*", $input);
|
||||
}
|
||||
|
||||
sub hex2byte
|
||||
{
|
||||
my $input = shift;
|
||||
return pack ("H*", $input);
|
||||
}
|
||||
|
||||
sub pad
|
||||
{
|
||||
my $n = shift;
|
||||
my $size = shift;
|
||||
|
||||
return (~$n + 1) & ($size - 1);
|
||||
}
|
||||
|
||||
sub module_constraints { [[0, 256], [16, 16], [-1, -1], [-1, -1], [-1, -1]] }
|
||||
|
||||
sub module_generate_hash
|
||||
{
|
||||
my $word = shift;
|
||||
my $salt = shift;
|
||||
my $user = shift // "user";
|
||||
my $realm = shift // "realm";
|
||||
my $checksum = shift;
|
||||
my $edata2 = shift;
|
||||
|
||||
my $mysalt = uc $realm;
|
||||
$mysalt = $mysalt . $user;
|
||||
|
||||
# first we generate the 'seed'
|
||||
my $iter = 4096;
|
||||
my $pbkdf2 = Crypt::PBKDF2->new
|
||||
(
|
||||
hash_class => 'HMACSHA1',
|
||||
iterations => $iter,
|
||||
output_len => 32
|
||||
);
|
||||
|
||||
my $b_seed = $pbkdf2->PBKDF2 ($mysalt, $word);
|
||||
|
||||
printf "seed: %s\n", byte2hex($b_seed);
|
||||
|
||||
# we can precompute this
|
||||
my $b_kerberos_nfolded = hex2byte('6b65726265726f737b9b5b2b93132b93');
|
||||
|
||||
my $b_iv = hex2byte('0' x 32);
|
||||
|
||||
# 'key_bytes' will be the AES key used to generate 'ki' (for final hmac-sha1)
|
||||
# and 'ke' (AES key to decrypt/encrypt the ticket)
|
||||
my $cbc = Crypt::Mode::CBC->new ('AES', 0);
|
||||
|
||||
my $b_key_bytes = $cbc->encrypt ($b_kerberos_nfolded, $b_seed, $b_iv);
|
||||
|
||||
$b_key_bytes = $b_key_bytes . $cbc->encrypt ($b_key_bytes, $b_seed, $b_iv);
|
||||
|
||||
printf "key_bytes: %s\n", byte2hex($b_key_bytes);
|
||||
|
||||
# precomputed stuff
|
||||
my $b_nfolded1 = hex2byte('62dc6e371a63a80958ac562b15404ac5');
|
||||
my $b_nfolded2 = hex2byte('b5b0582c14b6500aad56ab55aa80556a');
|
||||
|
||||
my $b_ki = $cbc->encrypt ($b_nfolded1, $b_key_bytes, $b_iv);
|
||||
|
||||
$b_ki = $b_ki . $cbc->encrypt ($b_ki, $b_key_bytes, $b_iv);
|
||||
|
||||
my $b_ke = $cbc->encrypt ($b_nfolded2, $b_key_bytes, $b_iv);
|
||||
|
||||
$b_ke = $b_ke . $cbc->encrypt ($b_ke, $b_key_bytes, $b_iv);
|
||||
|
||||
printf "ki: %s\n", byte2hex($b_ki);
|
||||
printf "ke: %s\n", byte2hex($b_ke);
|
||||
|
||||
my $cleartext_ticket = '6381b03081ada00703050050a00000a11b3019a003020117a1'.
|
||||
'12041058e0d77776e8b8e03991f2966939222aa2171b154d594b5242544553542e434f4e5'.
|
||||
'44f534f2e434f4da3133011a003020102a10a30081b067472616e6365a40b3009a0030201'.
|
||||
'01a1020400a511180f32303136303231353134343735305aa611180f32303136303231353'.
|
||||
'134343735305aa711180f32303136303231363030343735305aa811180f32303136303232'.
|
||||
'323134343735305a';
|
||||
|
||||
if (defined $edata2)
|
||||
{
|
||||
my $len_last_block = length($edata2) % 32;
|
||||
|
||||
my $tmp = $len_last_block + 32;
|
||||
|
||||
my $b_truncated_enc_ticket = hex2byte (substr $edata2, 0, -$tmp);
|
||||
|
||||
my $b_last_block = hex2byte (substr $edata2, -$len_last_block);
|
||||
|
||||
my $b_n_1_block = hex2byte (substr(substr($edata2, -$tmp), 0, 32));
|
||||
|
||||
my $b_truncated_ticket_decrypted = $cbc->decrypt ($b_truncated_enc_ticket, $b_ke, $b_iv);
|
||||
|
||||
my $truncated_ticket_decrypted = byte2hex($b_truncated_ticket_decrypted);
|
||||
|
||||
my $check_correct = ((substr ($truncated_ticket_decrypted, 32, 4) eq "6381" && substr ($truncated_ticket_decrypted, 38, 2) eq "30") ||
|
||||
(substr ($truncated_ticket_decrypted, 32, 4) eq "6382")) &&
|
||||
((substr ($truncated_ticket_decrypted, 48, 6) eq "030500") ||
|
||||
(substr ($truncated_ticket_decrypted, 48, 8) eq "050307A0"));
|
||||
|
||||
if ($check_correct == 1)
|
||||
{
|
||||
my $b_n_2 = substr $b_truncated_enc_ticket, -16;
|
||||
|
||||
my $b_n_1_decrypted = $cbc->decrypt ($b_n_1_block, $b_ke, $b_iv);
|
||||
|
||||
my $b_last_plain = substr $b_n_1_decrypted, 0, $len_last_block/2;
|
||||
|
||||
$b_last_plain = $b_last_plain ^ $b_last_block;
|
||||
|
||||
my $omitted = substr $b_n_1_decrypted, -(16 - $len_last_block/2);
|
||||
|
||||
my $b_n_1 = $b_last_block . $omitted;
|
||||
|
||||
$b_n_1 = $cbc->decrypt ($b_n_1, $b_ke, $b_iv);
|
||||
|
||||
$b_n_1 = $b_n_1 ^ $b_n_2;
|
||||
|
||||
my $b_cleartext_ticket = $b_truncated_ticket_decrypted . $b_n_1 . $b_last_plain;
|
||||
|
||||
$cleartext_ticket = byte2hex($b_cleartext_ticket);
|
||||
}
|
||||
else # validation failed
|
||||
{
|
||||
# fake/wrong ticket (otherwise if we just decrypt/encrypt we end
|
||||
#up with false positives all the time)
|
||||
$cleartext_ticket = "0" x (length ($cleartext_ticket) + 32);
|
||||
}
|
||||
}
|
||||
|
||||
if (defined $checksum)
|
||||
{
|
||||
$checksum = pack ("H*", $checksum);
|
||||
}
|
||||
else
|
||||
{
|
||||
if (!defined $edata2)
|
||||
{
|
||||
my $nonce = unpack ("H*", random_bytes (16));
|
||||
|
||||
$cleartext_ticket = $nonce . $cleartext_ticket;
|
||||
}
|
||||
# we have what is required to compute checksum
|
||||
$checksum = hmac_sha1 (hex2byte($cleartext_ticket), $b_ki);
|
||||
|
||||
$checksum = substr $checksum, 0, 12;
|
||||
}
|
||||
|
||||
my $len_cleartext_last_block = length($cleartext_ticket)%32;
|
||||
my $cleartext_last_block = substr $cleartext_ticket, -$len_cleartext_last_block;
|
||||
|
||||
my $padding = pad(length($cleartext_ticket), 32);
|
||||
|
||||
my $b_cleartext_last_block_padded = hex2byte($cleartext_last_block . '0' x $padding);
|
||||
|
||||
# we will encrypt until n-1 block (included)
|
||||
my $truncated_cleartext_ticket = substr $cleartext_ticket, 0, -$len_cleartext_last_block;
|
||||
|
||||
my $b_truncated_enc_ticket = $cbc->encrypt (hex2byte($truncated_cleartext_ticket), $b_ke, $b_iv);
|
||||
|
||||
my $b_enc_ticket_n_1_block= substr $b_truncated_enc_ticket, -16;
|
||||
|
||||
my $b_enc_last_block = substr $b_enc_ticket_n_1_block, 0, $len_cleartext_last_block/2;
|
||||
|
||||
# we now craft the new n-1 block
|
||||
my $tmp = $b_enc_ticket_n_1_block ^ $b_cleartext_last_block_padded;
|
||||
|
||||
$b_enc_ticket_n_1_block = $cbc->encrypt ($tmp, $b_ke, $b_iv);
|
||||
|
||||
$tmp = substr $b_truncated_enc_ticket, 0, -16;
|
||||
|
||||
$edata2 = $tmp . $b_enc_ticket_n_1_block . $b_enc_last_block;
|
||||
|
||||
my $tmp_hash = sprintf ('$krb5tgs$18$%s$%s$%s$%s', $user, $realm, unpack ("H*", $checksum), unpack ("H*", $edata2));
|
||||
|
||||
return $tmp_hash;
|
||||
}
|
||||
|
||||
sub module_verify_hash
|
||||
{
|
||||
my $line = shift;
|
||||
|
||||
my ($hash, $word) = split (':', $line);
|
||||
|
||||
return unless defined $hash;
|
||||
return unless defined $word;
|
||||
|
||||
my @data = split ('\$', $hash);
|
||||
|
||||
return unless scalar @data == 7;
|
||||
|
||||
shift @data;
|
||||
|
||||
my $signature = shift @data;
|
||||
my $algorithm = shift @data;
|
||||
my $user = shift @data;
|
||||
my $realm = shift @data;
|
||||
my $checksum = shift @data;
|
||||
my $edata2 = shift @data;
|
||||
|
||||
return unless ($signature eq "krb5tgs");
|
||||
return unless ($algorithm eq "18");
|
||||
return unless (length ($checksum) == 24);
|
||||
return unless (length ($edata2) >= 64);
|
||||
|
||||
my $word_packed = pack_if_HEX_notation ($word);
|
||||
|
||||
my $new_hash = module_generate_hash ($word_packed, undef, $user, $realm, $checksum, $edata2);
|
||||
|
||||
return ($new_hash, $word);
|
||||
}
|
||||
|
||||
1;
|
||||
Loading…
Reference in new issue