FreeCalypso > hg > freecalypso-tools
annotate target-utils/tf-breakin/mkembed.c @ 463:131eefcbe4d7
doc/Loadtools-usage: refer to Flash-boot-wa article when explaining
the extension of fc-iram to support second program invokation
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 10 Feb 2019 22:04:49 +0000 |
parents | e7502631a0f9 |
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1 #include <sys/types.h> |
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2 #include <sys/file.h> |
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3 #include <sys/stat.h> |
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4 #include <stdio.h> |
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5 #include <stdlib.h> |
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6 #include <unistd.h> |
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7 |
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8 #define PAYLOAD_SIZE 116 |
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9 u_char payload_buf[PAYLOAD_SIZE]; |
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10 |
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11 read_binary(filename) |
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12 char *filename; |
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13 { |
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14 int fd; |
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15 struct stat st; |
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16 |
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17 fd = open(filename, O_RDONLY); |
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18 if (fd < 0) { |
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19 perror(filename); |
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20 exit(1); |
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21 } |
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22 fstat(fd, &st); |
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23 if (!S_ISREG(st.st_mode)) { |
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24 fprintf(stderr, "error: %s is not a regular file\n", filename); |
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25 exit(1); |
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26 } |
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27 if (st.st_size != PAYLOAD_SIZE) { |
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28 fprintf(stderr, "error: %s size mismatch\n", filename); |
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29 exit(1); |
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30 } |
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31 if (read(fd, payload_buf, PAYLOAD_SIZE) != PAYLOAD_SIZE) { |
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32 perror("read error"); |
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33 exit(1); |
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34 } |
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35 close(fd); |
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36 } |
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37 |
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38 write_output(filename) |
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39 char *filename; |
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40 { |
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41 FILE *of; |
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42 int i, j, idx; |
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43 |
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44 of = fopen(filename, "w"); |
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45 if (!of) { |
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46 perror(filename); |
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47 exit(1); |
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48 } |
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49 fprintf(of, "u_char shellcode[%d] = {\n", PAYLOAD_SIZE); |
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50 idx = 0; |
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51 for (i = 0; i < 15; i++) { |
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52 for (j = 0; j < 8; j++) { |
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53 if (j) |
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54 putc(' ', of); |
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55 else |
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56 putc('\t', of); |
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57 fprintf(of, "0x%02X,", payload_buf[idx++]); |
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58 if (idx >= PAYLOAD_SIZE) |
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59 break; |
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60 } |
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61 putc('\n', of); |
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62 } |
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63 fputs("};\n", of); |
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64 fclose(of); |
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65 } |
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66 |
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67 main(argc, argv) |
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68 char **argv; |
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69 { |
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70 if (argc != 3) { |
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71 fprintf(stderr, "usage: %s payload.bin output.c\n", argv[0]); |
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72 exit(1); |
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73 } |
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74 read_binary(argv[1]); |
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75 write_output(argv[2]); |
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76 exit(0); |
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77 } |