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now we can crack the hash direct from pdf2john.pl, no need to alter it ourselves anymore

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This commit is contained in:
Your Name 2021-04-10 00:07:00 +02:00
parent d52f9c2cad
commit 4b24e91610
2 changed files with 16 additions and 25 deletions
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20
OpenCL/m25400-pure.cl
View File

@ -3,6 +3,9 @@
* License.....: MIT
*/
// TODO use user password as input for md5 of o_digest if no owner password is set
// TODO dynamically add user password including padding to the RC4 input for the computation of the pdf o-value
#ifdef KERNEL_STATIC
#include "inc_vendor.h"
#include "inc_types.h"
@ -214,21 +217,6 @@ KERNEL_FQ void m25400_init (KERN_ATTR_TMPS_ESALT (pdf14_tmp_t, pdf_t))
//LOCAL_AS RC4_KEY rc4_keys[64];
//LOCAL_AS RC4_KEY *rc4_key = &rc4_keys[lid];
/**
* U_buf
*/
u32 o_buf[8];
o_buf[0] = esalt_bufs[DIGESTS_OFFSET].o_buf[0];
o_buf[1] = esalt_bufs[DIGESTS_OFFSET].o_buf[1];
o_buf[2] = esalt_bufs[DIGESTS_OFFSET].o_buf[2];
o_buf[3] = esalt_bufs[DIGESTS_OFFSET].o_buf[3];
o_buf[4] = esalt_bufs[DIGESTS_OFFSET].o_buf[4];
o_buf[5] = esalt_bufs[DIGESTS_OFFSET].o_buf[5];
o_buf[6] = esalt_bufs[DIGESTS_OFFSET].o_buf[6];
o_buf[7] = esalt_bufs[DIGESTS_OFFSET].o_buf[7];
u32 P = esalt_bufs[DIGESTS_OFFSET].P;
u32 id_buf[12];
@ -285,7 +273,7 @@ KERNEL_FQ void m25400_init (KERN_ATTR_TMPS_ESALT (pdf14_tmp_t, pdf_t))
// add password
// truncate at 32 is wanted, not a bug!
// add o_buf
// add padding
w0_t[0] |= w0[0];
w0_t[1] |= w0[1];

21
src/modules/module_25400.c
View File

@ -3,6 +3,9 @@
* License.....: MIT
*/
// TODO use user password as input for md5 of o_digest if no owner password is set
// TODO dynamically add user password including padding to the RC4 input for the computation of the pdf o-value
#include "common.h"
#include "types.h"
#include "modules.h"
@ -25,7 +28,7 @@ static const u32 OPTI_TYPE = OPTI_TYPE_ZERO_BYTE
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 = "$pdf$2*3*128*-3904*1*16*631ed33746e50fba5caf56bcc39e09c6*32*842103b0a0dc886db9223b94afe2d7cd63389079b61986a4fcf70095ad630c24*32*5f9d0e4f0b39835dace0d306c40cd6b700000000000000000000000000000000";
static const char *ST_HASH = "$pdf$2*3*128*-3904*1*16*631ed33746e50fba5caf56bcc39e09c6*32*5f9d0e4f0b39835dace0d306c40cd6b700000000000000000000000000000000*32*842103b0a0dc886db9223b94afe2d7cd63389079b61986a4fcf70095ad630c24";
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; }
@ -242,9 +245,9 @@ int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSE
const u8 *id_len_pos = token.buf[6];
const u8 *id_buf_pos = token.buf[7];
const u8 *u_len_pos = token.buf[8];
const u8 *u_buf_pos = token.buf[9];
const u8 *u_buf_pos = token.buf[9]; // user hash
const u8 *o_len_pos = token.buf[10];
const u8 *o_buf_pos = token.buf[11];
const u8 *o_buf_pos = token.buf[11]; // owner hash
// validate data
@ -358,16 +361,16 @@ int module_hash_decode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSE
salt->salt_buf[1] = pdf->id_buf[1];
salt->salt_buf[2] = pdf->id_buf[2];
salt->salt_buf[3] = pdf->id_buf[3];
salt->salt_buf[4] = pdf->u_buf[0];
salt->salt_buf[5] = pdf->u_buf[1];
salt->salt_buf[6] = pdf->o_buf[0];
salt->salt_buf[7] = pdf->o_buf[1];
salt->salt_buf[4] = pdf->o_buf[0]; // switched u_buf with o_buf vs m10500
salt->salt_buf[5] = pdf->o_buf[1];
salt->salt_buf[6] = pdf->u_buf[0];
salt->salt_buf[7] = pdf->u_buf[1];
salt->salt_len = pdf->id_len + 16;
salt->salt_iter = (50 + 20);
digest[0] = pdf->u_buf[0];
digest[1] = pdf->u_buf[1];
digest[0] = pdf->o_buf[0]; // o_buf instead of u_buf vs m10500
digest[1] = pdf->o_buf[1];
digest[2] = 0;
digest[3] = 0;