1 | #include <stdio.h> |
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2 | #include "libpacketdump.h" |
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3 | |
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4 | #define POPBYTE(x) \ |
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5 | do { \ |
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6 | if (len<1) return; \ |
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7 | x=*(packet++); \ |
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8 | } while(0) |
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9 | |
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10 | #define POPWORD(x) \ |
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11 | do { \ |
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12 | if (len<2) return; \ |
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13 | x=htons(*(uint16_t*)packet); \ |
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14 | packet+=2; \ |
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15 | } while(0) |
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16 | |
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17 | static void decode_eap_request(char *packet, unsigned len) |
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18 | { |
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19 | int v; |
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20 | POPBYTE(v); |
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21 | printf(" 802.1x: EAP: Identifier: %u\n",v); |
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22 | POPWORD(v); |
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23 | printf(" 802.1x: EAP: Length: %u\n",v); |
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24 | POPBYTE(v); |
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25 | printf(" 802.1x: EAP: Type: "); |
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26 | switch(v) { |
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27 | case 1: printf(" Identity (1)\n"); break; |
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28 | case 2: printf(" Notification (2)\n"); break; |
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29 | case 3: printf(" NAK (3)\n"); break; |
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30 | case 4: printf(" MD5-Challenge (4)\n"); break; |
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31 | case 5: printf(" One-Time Password (5)\n"); break; |
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32 | case 6: printf(" Generic Token Card (6)\n"); break; |
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33 | } |
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34 | } |
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35 | |
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36 | static void decode_eap(char *packet, unsigned len) |
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37 | { |
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38 | int v; |
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39 | POPWORD(v); |
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40 | printf(" 802.1x: Length: %d\n",v); |
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41 | POPBYTE(v); |
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42 | printf(" 802.1x: EAP: "); |
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43 | switch(v) { |
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44 | case 1: |
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45 | printf("Request (1)\n"); |
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46 | decode_eap_request(packet,len); |
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47 | break; |
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48 | case 2: printf("Response (2)\n"); break; |
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49 | case 3: printf("Success (3)\n"); break; |
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50 | case 4: printf("Failure (4)\n"); break; |
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51 | default: printf("#0x%02x\n",v); break; |
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52 | } |
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53 | |
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54 | } |
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55 | |
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56 | static void decode_eapol_start(char *packet, unsigned len) |
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57 | { |
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58 | int v; |
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59 | POPWORD(v); |
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60 | printf(" 802.1x: Length: %d\n",v); |
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61 | } |
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62 | |
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63 | static void decode_eapol_logoff(char *packet, unsigned len) |
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64 | { |
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65 | int v; |
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66 | POPWORD(v); |
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67 | printf(" 802.1x: Length: %d\n",v); |
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68 | } |
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69 | |
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70 | struct key_descriptor { |
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71 | uint8_t descriptor_type; |
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72 | uint16_t key_length; |
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73 | uint64_t replay_counter; |
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74 | uint8_t key_iv[27-12]; |
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75 | uint8_t kevy_index; |
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76 | uint8_t key_signature[44-29]; |
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77 | }; |
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78 | |
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79 | static void decode_eapol_key(char *packet, unsigned len) |
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80 | { |
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81 | int v; |
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82 | POPWORD(v); |
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83 | printf(" 802.1x: Length: %d\n",v); |
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84 | } |
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85 | |
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86 | static void decode_eapol_encapsulated_asf_alert(char *packet, unsigned len) |
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87 | { |
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88 | int v; |
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89 | POPWORD(v); |
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90 | printf(" 802.1x: Length: %d\n",v); |
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91 | } |
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92 | |
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93 | void decode(int link_type,char *packet,unsigned len) |
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94 | { |
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95 | int offset; |
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96 | int v; |
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97 | int type; |
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98 | POPBYTE(v); |
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99 | printf(" 802.1x: Version: %u\n",v); |
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100 | POPBYTE(type); |
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101 | printf(" 802.1x: Type: "); |
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102 | switch (type) { |
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103 | case 0: |
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104 | printf(" EAP-Packet (0)\n"); |
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105 | decode_eap(packet,len); |
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106 | break; |
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107 | case 1: printf(" EAPOL-Start (1)\n"); |
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108 | decode_eapol_start(packet,len); |
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109 | break; |
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110 | case 2: |
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111 | printf(" EAPOL-Logoff (2)\n"); |
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112 | decode_eapol_logoff(packet,len); |
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113 | break; |
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114 | case 3: |
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115 | printf(" EAPOL-Key (3)\n"); |
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116 | decode_eapol_key(packet,len); |
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117 | break; |
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118 | case 4: |
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119 | printf(" EAPOL-Encasulated-ASF-Alert (4)\n"); |
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120 | decode_eapol_encapsulated_asf_alert(packet,len); |
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121 | break; |
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122 | default: |
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123 | printf(" Unknown #0x%02x\n",v); |
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124 | decode_next(packet,len,"eapol",type); |
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125 | break; |
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126 | } |
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127 | |
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128 | return; |
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129 | } |
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