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405 lines
8.2 KiB
Common Lisp
405 lines
8.2 KiB
Common Lisp
/**
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* Author......: See docs/credits.txt
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* License.....: MIT
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*/
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//shared mem too small
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//#define NEW_SIMD_CODE
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#ifdef KERNEL_STATIC
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#include "inc_vendor.h"
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#include "inc_types.h"
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#include "inc_platform.cl"
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#include "inc_common.cl"
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#include "inc_hash_md4.cl"
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#include "inc_hash_md5.cl"
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#include "inc_cipher_rc4.cl"
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#endif
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typedef struct krb5asrep
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{
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u32 account_info[512];
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u32 checksum[4];
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u32 edata2[5120];
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u32 edata2_len;
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} krb5asrep_t;
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DECLSPEC int decrypt_and_check (LOCAL_AS u32 *S, u32 *data, GLOBAL_AS const u32 *edata2, const u32 edata2_len, const u32 *K2, const u32 *checksum)
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{
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rc4_init_128 (S, data);
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u32 out0[4];
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/*
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8 first bytes are nonce, then ASN1 structs (DER encoding: TLV)
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The first byte is always 0x79 (01 1 11001, where 01 = "class=APPLICATION", 1 = "form=constructed", 11001 is application type 25)
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The next byte is the length:
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if length < 128 bytes:
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length is on 1 byte, and the next byte is 0x30 (class=SEQUENCE)
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else if length <= 256:
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length is on 2 bytes, the first byte is 0x81, and the third byte is 0x30 (class=SEQUENCE)
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else if length > 256:
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length is on 3 bytes, the first byte is 0x82, and the fourth byte is 0x30 (class=SEQUENCE)
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*/
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rc4_next_16_global (S, 0, 0, edata2 + 0, out0);
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if (((out0[2] & 0x00ff80ff) != 0x00300079) &&
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((out0[2] & 0xFF00FFFF) != 0x30008179) &&
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((out0[2] & 0x0000FFFF) != 0x00008279 || (out0[3] & 0x000000FF) != 0x00000030))
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return 0;
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rc4_init_128 (S, data);
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u8 i = 0;
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u8 j = 0;
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// init hmac
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u32 w0[4];
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u32 w1[4];
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u32 w2[4];
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u32 w3[4];
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w0[0] = K2[0];
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w0[1] = K2[1];
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w0[2] = K2[2];
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w0[3] = K2[3];
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w1[0] = 0;
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w1[1] = 0;
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w1[2] = 0;
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w1[3] = 0;
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w2[0] = 0;
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w2[1] = 0;
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w2[2] = 0;
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w2[3] = 0;
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w3[0] = 0;
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w3[1] = 0;
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w3[2] = 0;
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w3[3] = 0;
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md5_hmac_ctx_t ctx;
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md5_hmac_init_64 (&ctx, w0, w1, w2, w3);
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int edata2_left;
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for (edata2_left = edata2_len; edata2_left >= 64; edata2_left -= 64)
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{
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j = rc4_next_16_global (S, i, j, edata2, w0); i += 16; edata2 += 4;
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j = rc4_next_16_global (S, i, j, edata2, w1); i += 16; edata2 += 4;
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j = rc4_next_16_global (S, i, j, edata2, w2); i += 16; edata2 += 4;
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j = rc4_next_16_global (S, i, j, edata2, w3); i += 16; edata2 += 4;
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md5_hmac_update_64 (&ctx, w0, w1, w2, w3, 64);
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}
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w0[0] = 0;
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w0[1] = 0;
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w0[2] = 0;
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w0[3] = 0;
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w1[0] = 0;
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w1[1] = 0;
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w1[2] = 0;
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w1[3] = 0;
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w2[0] = 0;
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w2[1] = 0;
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w2[2] = 0;
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w2[3] = 0;
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w3[0] = 0;
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w3[1] = 0;
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w3[2] = 0;
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w3[3] = 0;
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if (edata2_left < 16)
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{
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j = rc4_next_16_global (S, i, j, edata2, w0); i += 16; edata2 += 4;
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truncate_block_4x4_le_S (w0, edata2_left & 0xf);
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}
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else if (edata2_left < 32)
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{
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j = rc4_next_16_global (S, i, j, edata2, w0); i += 16; edata2 += 4;
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j = rc4_next_16_global (S, i, j, edata2, w1); i += 16; edata2 += 4;
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truncate_block_4x4_le_S (w1, edata2_left & 0xf);
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}
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else if (edata2_left < 48)
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{
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j = rc4_next_16_global (S, i, j, edata2, w0); i += 16; edata2 += 4;
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j = rc4_next_16_global (S, i, j, edata2, w1); i += 16; edata2 += 4;
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j = rc4_next_16_global (S, i, j, edata2, w2); i += 16; edata2 += 4;
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truncate_block_4x4_le_S (w2, edata2_left & 0xf);
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}
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else
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{
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j = rc4_next_16_global (S, i, j, edata2, w0); i += 16; edata2 += 4;
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j = rc4_next_16_global (S, i, j, edata2, w1); i += 16; edata2 += 4;
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j = rc4_next_16_global (S, i, j, edata2, w2); i += 16; edata2 += 4;
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j = rc4_next_16_global (S, i, j, edata2, w3); i += 16; edata2 += 4;
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truncate_block_4x4_le_S (w3, edata2_left & 0xf);
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}
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md5_hmac_update_64 (&ctx, w0, w1, w2, w3, edata2_left);
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md5_hmac_final (&ctx);
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if (checksum[0] != ctx.opad.h[0]) return 0;
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if (checksum[1] != ctx.opad.h[1]) return 0;
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if (checksum[2] != ctx.opad.h[2]) return 0;
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if (checksum[3] != ctx.opad.h[3]) return 0;
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return 1;
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}
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DECLSPEC void kerb_prepare (const u32 *K, const u32 *checksum, u32 *digest, u32 *K2)
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{
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// K1=MD5_HMAC(K,1); with 1 encoded as little indian on 4 bytes (01000000 in hexa);
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u32 w0[4];
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u32 w1[4];
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u32 w2[4];
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u32 w3[4];
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w0[0] = K[0];
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w0[1] = K[1];
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w0[2] = K[2];
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w0[3] = K[3];
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w1[0] = 0;
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w1[1] = 0;
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w1[2] = 0;
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w1[3] = 0;
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w2[0] = 0;
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w2[1] = 0;
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w2[2] = 0;
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w2[3] = 0;
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w3[0] = 0;
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w3[1] = 0;
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w3[2] = 0;
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w3[3] = 0;
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md5_hmac_ctx_t ctx1;
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md5_hmac_init_64 (&ctx1, w0, w1, w2, w3);
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w0[0] = 8;
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w0[1] = 0;
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w0[2] = 0;
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w0[3] = 0;
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w1[0] = 0;
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w1[1] = 0;
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w1[2] = 0;
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w1[3] = 0;
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w2[0] = 0;
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w2[1] = 0;
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w2[2] = 0;
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w2[3] = 0;
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w3[0] = 0;
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w3[1] = 0;
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w3[2] = 0;
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w3[3] = 0;
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md5_hmac_update_64 (&ctx1, w0, w1, w2, w3, 4);
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md5_hmac_final (&ctx1);
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w0[0] = ctx1.opad.h[0];
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w0[1] = ctx1.opad.h[1];
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w0[2] = ctx1.opad.h[2];
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w0[3] = ctx1.opad.h[3];
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w1[0] = 0;
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w1[1] = 0;
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w1[2] = 0;
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w1[3] = 0;
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w2[0] = 0;
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w2[1] = 0;
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w2[2] = 0;
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w2[3] = 0;
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w3[0] = 0;
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w3[1] = 0;
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w3[2] = 0;
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w3[3] = 0;
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md5_hmac_ctx_t ctx;
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md5_hmac_init_64 (&ctx, w0, w1, w2, w3);
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w0[0] = checksum[0];
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w0[1] = checksum[1];
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w0[2] = checksum[2];
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w0[3] = checksum[3];
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w1[0] = 0;
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w1[1] = 0;
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w1[2] = 0;
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w1[3] = 0;
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w2[0] = 0;
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w2[1] = 0;
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w2[2] = 0;
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w2[3] = 0;
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w3[0] = 0;
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w3[1] = 0;
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w3[2] = 0;
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w3[3] = 0;
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md5_hmac_update_64 (&ctx, w0, w1, w2, w3, 16);
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md5_hmac_final (&ctx);
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digest[0] = ctx.opad.h[0];
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digest[1] = ctx.opad.h[1];
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digest[2] = ctx.opad.h[2];
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digest[3] = ctx.opad.h[3];
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K2[0] = ctx1.opad.h[0];
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K2[1] = ctx1.opad.h[1];
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K2[2] = ctx1.opad.h[2];
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K2[3] = ctx1.opad.h[3];
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}
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KERNEL_FQ void m18200_mxx (KERN_ATTR_VECTOR_ESALT (krb5asrep_t))
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{
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/**
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* modifier
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*/
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const u64 lid = get_local_id (0);
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const u64 gid = get_global_id (0);
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if (gid >= gid_max) return;
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/**
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* base
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*/
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const u32 pw_len = pws[gid].pw_len;
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u32x w[64] = { 0 };
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for (u32 i = 0, idx = 0; i < pw_len; i += 4, idx += 1)
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{
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w[idx] = pws[gid].i[idx];
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}
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LOCAL_VK u32 S[64 * FIXED_LOCAL_SIZE];
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u32 checksum[4];
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checksum[0] = esalt_bufs[DIGESTS_OFFSET].checksum[0];
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checksum[1] = esalt_bufs[DIGESTS_OFFSET].checksum[1];
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checksum[2] = esalt_bufs[DIGESTS_OFFSET].checksum[2];
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checksum[3] = esalt_bufs[DIGESTS_OFFSET].checksum[3];
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/**
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* loop
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*/
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u32x w0l = w[0];
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for (u32 il_pos = 0; il_pos < il_cnt; il_pos += VECT_SIZE)
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{
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const u32x w0r = words_buf_r[il_pos / VECT_SIZE];
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const u32x w0 = w0l | w0r;
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w[0] = w0;
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md4_ctx_t ctx;
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md4_init (&ctx);
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md4_update_utf16le (&ctx, w, pw_len);
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md4_final (&ctx);
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u32 digest[4];
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u32 K2[4];
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kerb_prepare (ctx.h, checksum, digest, K2);
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if (decrypt_and_check (S, digest, esalt_bufs[DIGESTS_OFFSET].edata2, esalt_bufs[DIGESTS_OFFSET].edata2_len, K2, checksum) == 1)
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{
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if (hc_atomic_inc (&hashes_shown[DIGESTS_OFFSET]) == 0)
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{
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mark_hash (plains_buf, d_return_buf, SALT_POS, digests_cnt, 0, DIGESTS_OFFSET + 0, gid, il_pos, 0, 0);
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}
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}
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}
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}
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KERNEL_FQ void m18200_sxx (KERN_ATTR_VECTOR_ESALT (krb5asrep_t))
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{
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/**
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* modifier
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*/
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const u64 lid = get_local_id (0);
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const u64 gid = get_global_id (0);
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if (gid >= gid_max) return;
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/**
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* base
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*/
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const u32 pw_len = pws[gid].pw_len;
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u32x w[64] = { 0 };
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for (u32 i = 0, idx = 0; i < pw_len; i += 4, idx += 1)
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{
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w[idx] = pws[gid].i[idx];
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}
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LOCAL_VK u32 S[64 * FIXED_LOCAL_SIZE];
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u32 checksum[4];
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checksum[0] = esalt_bufs[DIGESTS_OFFSET].checksum[0];
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checksum[1] = esalt_bufs[DIGESTS_OFFSET].checksum[1];
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checksum[2] = esalt_bufs[DIGESTS_OFFSET].checksum[2];
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checksum[3] = esalt_bufs[DIGESTS_OFFSET].checksum[3];
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/**
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* loop
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*/
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u32x w0l = w[0];
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for (u32 il_pos = 0; il_pos < il_cnt; il_pos += VECT_SIZE)
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{
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const u32x w0r = words_buf_r[il_pos / VECT_SIZE];
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const u32x w0 = w0l | w0r;
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w[0] = w0;
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md4_ctx_t ctx;
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md4_init (&ctx);
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md4_update_utf16le (&ctx, w, pw_len);
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md4_final (&ctx);
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u32 digest[4];
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u32 K2[4];
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kerb_prepare (ctx.h, checksum, digest, K2);
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if (decrypt_and_check (S, digest, esalt_bufs[DIGESTS_OFFSET].edata2, esalt_bufs[DIGESTS_OFFSET].edata2_len, K2, checksum) == 1)
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{
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if (hc_atomic_inc (&hashes_shown[DIGESTS_OFFSET]) == 0)
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{
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mark_hash (plains_buf, d_return_buf, SALT_POS, digests_cnt, 0, DIGESTS_OFFSET + 0, gid, il_pos, 0, 0);
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}
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}
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}
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}
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