mirror of
https://github.com/hashcat/hashcat.git
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420 lines
17 KiB
C
420 lines
17 KiB
C
/**
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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, etype 18, AS-REP";
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static const u64 KERN_TYPE = 32200;
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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_STOCK_MODULE
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| 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 = "$krb5asrep$18$user$EXAMPLE.COM$aa4c494f520b27873a4de8f7$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";
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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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// Struct to store the hash structure - same fields as TGS-REP type 18
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typedef struct krb5asrep_18
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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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u32 format;
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} krb5asrep_18_t;
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typedef struct krb5asrep_18_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[16];
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u32 out[16];
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} krb5asrep_18_tmp_t;
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static const char *SIGNATURE_KRB5ASREP = "$krb5asrep$18$";
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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 (krb5asrep_18_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 (krb5asrep_18_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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krb5asrep_18_t *krb5asrep = (krb5asrep_18_t *) esalt_buf;
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hc_token_t token;
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memset (&token, 0, sizeof (hc_token_t));
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token.signatures_cnt = 1;
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token.signatures_buf[0] = SIGNATURE_KRB5ASREP;
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token.len[0] = strlen (SIGNATURE_KRB5ASREP);
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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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* Haschat
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* format 1: $krb5asrep$18$user$realm$checksum$edata2
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*
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* JtR
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* format 2: $krb5asrep$18$salt$edata2$checksum
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*/
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if (line_len < (int) strlen (SIGNATURE_KRB5ASREP)) return (PARSER_SALT_LENGTH);
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memset (krb5asrep, 0, sizeof (krb5asrep_18_t));
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/**
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* JtR format has the checksum at the end, so can identify it based on the
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* separator ('$') being at a fixed length from the end of the line. Checksum
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* is 24 characters in length, so then there should be a '$' at line_len - 25
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*/
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if (line_buf[line_len - 25] == '$')
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{
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// JtR format
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krb5asrep->format = 2;
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}
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else
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{
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// Hashcat format
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krb5asrep->format = 1;
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}
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token.token_cnt = 4;
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if (krb5asrep->format == 1)
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{
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token.token_cnt++;
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// user
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token.sep[1] = '$';
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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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// realm
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token.sep[2] = '$';
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token.len_min[2] = 1;
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token.len_max[2] = 512;
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token.attr[2] = TOKEN_ATTR_VERIFY_LENGTH;
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// checksum
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token.sep[3] = '$';
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// hmac-sha1 stripped to 12bytes
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token.len[3] = 24;
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token.attr[3] = TOKEN_ATTR_FIXED_LENGTH
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| TOKEN_ATTR_VERIFY_HEX;
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// edata2
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token.sep[4] = '$';
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token.len_min[4] = 64;
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token.len_max[4] = 40960;
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token.attr[4] = TOKEN_ATTR_VERIFY_LENGTH
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| TOKEN_ATTR_VERIFY_HEX;
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}
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else
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{
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// salt
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token.sep[1] = '$';
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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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// edata2
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token.sep[2] = '$';
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token.len_min[2] = 64;
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token.len_max[2] = 40960;
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token.attr[2] = TOKEN_ATTR_VERIFY_LENGTH
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| TOKEN_ATTR_VERIFY_HEX;
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// checksum
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token.sep[3] = '$';
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// hmac-sha1 stripped to 12bytes
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token.len[3] = 24;
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token.attr[3] = TOKEN_ATTR_FIXED_LENGTH
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| TOKEN_ATTR_VERIFY_HEX;
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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 *salt_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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if (krb5asrep->format == 1)
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{
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user_pos = token.buf[1];
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user_len = token.len[1];
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memcpy (krb5asrep->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 (krb5asrep->domain, domain_pos, domain_len);
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checksum_pos = token.buf[3];
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data_pos = token.buf[4];
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data_len = token.len[4];
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account_info_len = token.len[2] + token.len[1];
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}
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else
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{
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salt_pos = token.buf[1];
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account_info_len = token.len[1];
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memcpy (krb5asrep->account_info, salt_pos, account_info_len);
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/**
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* JtR format only has the final salt/account_info value (combination of
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* user and domain), rather than separate "user" and "domain" values. Since
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* user and domain won't be used for the JtR format, their values won't
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* matter, so set them both to the same value as account_info.
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*/
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user_pos = token.buf[1];
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user_len = token.len[1];
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memcpy (krb5asrep->user, user_pos, user_len);
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domain_pos = token.buf[1];
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domain_len = token.len[1];
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memcpy (krb5asrep->domain, domain_pos, domain_len);
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data_pos = token.buf[2];
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data_len = token.len[2];
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checksum_pos = token.buf[3];
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}
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u8 *account_info_ptr = (u8 *) krb5asrep->account_info;
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// Domain must be uppercase
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u8 domain[128];
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if (krb5asrep->format == 1)
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{
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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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}
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krb5asrep->account_info_len = account_info_len;
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// hmac-sha1 is reduced to 12 bytes
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krb5asrep->checksum[0] = byte_swap_32 (hex_to_u32 (checksum_pos + 0));
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krb5asrep->checksum[1] = byte_swap_32 (hex_to_u32 (checksum_pos + 8));
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krb5asrep->checksum[2] = byte_swap_32 (hex_to_u32 (checksum_pos + 16));
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u8 *edata_ptr = (u8 *) krb5asrep->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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krb5asrep->edata2_len = data_len / 2;
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salt->salt_buf[0] = krb5asrep->checksum[0];
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salt->salt_buf[1] = krb5asrep->checksum[1];
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salt->salt_buf[2] = krb5asrep->checksum[2];
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salt->salt_len = 12;
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salt->salt_iter = 4096 - 1;
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digest[0] = krb5asrep->checksum[0];
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digest[1] = krb5asrep->checksum[1];
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digest[2] = krb5asrep->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 krb5asrep_18_t *krb5asrep = (const krb5asrep_18_t *) esalt_buf;
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char data[5120 * 4 * 2] = { 0 };
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for (u32 i = 0, j = 0; i < krb5asrep->edata2_len; i += 1, j += 2)
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{
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u8 *ptr_edata2 = (u8 *) krb5asrep->edata2;
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snprintf (data + j, 3, "%02x", ptr_edata2[i]);
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}
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int line_len = 0;
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if (krb5asrep->format == 1)
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{
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line_len = snprintf (line_buf, line_size, "%s%s$%s$%08x%08x%08x$%s",
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SIGNATURE_KRB5ASREP,
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(char *) krb5asrep->user,
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(char *) krb5asrep->domain,
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krb5asrep->checksum[0],
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krb5asrep->checksum[1],
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krb5asrep->checksum[2],
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data);
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}
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else
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{
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line_len = snprintf (line_buf, line_size, "%s%s$%s$%08x%08x%08x",
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SIGNATURE_KRB5ASREP,
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(char *) krb5asrep->account_info,
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data,
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krb5asrep->checksum[0],
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krb5asrep->checksum[1],
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krb5asrep->checksum[2]);
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}
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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_charset = 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_deprecated_notice = 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_extra_tuningdb_block = 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_postprocess = MODULE_DEFAULT;
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module_ctx->module_hash_decode_potfile = 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_potfile = 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_hashes_count_min = MODULE_DEFAULT;
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module_ctx->module_hashes_count_max = MODULE_DEFAULT;
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module_ctx->module_hlfmt_disable = MODULE_DEFAULT;
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module_ctx->module_hook_extra_param_size = MODULE_DEFAULT;
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module_ctx->module_hook_extra_param_init = MODULE_DEFAULT;
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module_ctx->module_hook_extra_param_term = 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;
|
|
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_custom_check = 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;
|
|
}
|