src/crypto/ssl.c

   1 #if 0
   2
   3 #include "ssl.h"
   4 #include "ssl_constructs.h"
   5 #include <string.h> // for bcopy()
   6 #include <time.h> // for time()
   7 #include <stdlib.h> // for rand(), htons?, htonl?
   8 // note net byte order is big-endian
   9 // Need to set error codes
  10
  11 int CreateSSLHello(SSL_t *ssl)
  12 {
  13   printf("In CreateSSLHello()\n",ssl);
  14
  15   // Initalize the structure
  16   bzero(ssl,sizeof(SSL_t));
  17   //ssl->max_size = sizeof(ssl->buffer);
  18   ssl->max_size = 18456;
  19
  20   // Declare variables
  21   int i; void *ptr;
  22
  23   // Set pointers into buffer
  24   SSLPlaintext *record = (SSLPlaintext *)ssl->buffer;
  25   Handshake *handshake = (Handshake *)record->fragment;
  26   // the body starts right after the handshake
  27   printf("sizeof(Handshake) = %d\n",sizeof(Handshake));
  28   ClientHello *hello = (ClientHello *)(handshake + 1);
  29
  30   printf("record->%#x, handshake->%#x, hello->%#x\n",record,handshake,hello);
  31
  32   // Construct ClientHello Message
  33   hello->client_version = version;
  34   i = htonl(time(NULL));
  35   bcopy(&i,hello->random.gmt_unix_time,4);
  36   for(i=0;i<28;i++){ hello->random.random_bytes[i] = (uint8)rand(); }
  37   hello->session_id_length = 0;
  38   hello->session_id = &hello->session_id_length;
  39   hello->session_id_end = hello->session_id;
  40   hello->cipher_suites_length = (CipherSuiteLength *)(hello->session_id_end + 1);
  41   hello->cipher_suites = (hello->cipher_suites_length + 1);
  42   hello->cipher_suites_end = hello->cipher_suites;
  43   i = htons(2*5); // 2 bytes per Suite * 5 Suites
  44   bcopy(&i,hello->cipher_suites_length,2);
  45   bcopy(SSL_NULL_WITH_NULL_NULL,hello->cipher_suites_end,sizeof(CipherSuite));
  46   *hello->cipher_suites_end++;
  47   bcopy(SSL_DH_DSS_EXPORT_WITH_DES40_CBC_SHA,hello->cipher_suites_end,sizeof(CipherSuite));
  48   *hello->cipher_suites_end++;
  49   bcopy(SSL_DH_DSS_WITH_DES_CBC_SHA,hello->cipher_suites_end,sizeof(CipherSuite));
  50   *hello->cipher_suites_end++;
  51   bcopy(SSL_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA,hello->cipher_suites_end,sizeof(CipherSuite));
  52   *hello->cipher_suites_end++;
  53   bcopy(SSL_DH_anon_WITH_RC4_128_MD5,hello->cipher_suites_end,sizeof(CipherSuite));
  54   hello->compression_methods_length = (CompressionMethodLength *)(hello->cipher_suites_end + 1);
  55   hello->compression_methods = (hello->compression_methods_length + 1);
  56   hello->compression_methods_end = hello->compression_methods;
  57   *hello->compression_methods_length = 1;
  58   *hello->compression_methods_end = compression_method_null;
  59
  60   // Construct Handshake Message
  61   handshake->msg_type = handshake_type_client_hello;
  62   i = (void *)(hello->compression_methods_end + 1) - (void *)hello;
  63   printf("Handshake.length = %d\n", i);
  64   handshake->length[0] = (char)*(&i+8);
  65   handshake->length[1] = (char)*(&i+8);
  66   handshake->length[2] = (char)i;
  67   //bcopy((&i+1),handshake->length,3); // +1 so we copy 3 bytes
  68
  69   // Construct SSL Record
  70   printf("sizeof(ContentType)=%d\n",sizeof(ContentType));
  71   printf("sizeof(uint8)=%d\n",sizeof(uint8));
  72   record->type = content_type_handshake;
  73   record->version = version;
  74   i += sizeof(Handshake);
  75   printf("SSLPlaintext.length = %d\n",i);
  76   record->length[0] = (char)*(&i+8);
  77   record->length[1] = (char)i;
  78   //bcopy(&i,record->length,4); // length of handshake
  79
  80   // Set total size of message
  81   i += sizeof(ContentType) + sizeof(ProtocolVersion) + sizeof(uint16);
  82   ssl->length = i;
  83   printf("End of CreateSSLHello\n");
  84   return 0;
  85 }
  86
  87 void PrintSSLPacket(SSL_t *ssl)
  88 {
  89   printf("Printing packet with length:%d\n", ssl->length);
  90   char *ptr = ssl->buffer;
  91   char *begin = ptr;
  92   char *tmp;
  93   char *end = ssl->buffer + ssl->length;
  94   printf("Record Layer:\n");
  95   printf("\tContentType: %2hhX\n",(char)*ptr++);
  96   printf("\tVersion: %2hhX %2hhX\n", (char)*ptr++, (char)*ptr++);
  97   printf("\tLength: %2hhX %2hhX\n", (char)*ptr++, (char)*ptr++);
  98
  99   printf("Handshake:\n");
 100   printf("\tType: %2hhX\n", (char)*ptr++);
 101   printf("\tLength: %2hhX %2hhX %2hhX\n", (char)*ptr++, (char)*ptr++, (char)*ptr++);
 102   printf("\tVersion: %2hhX %2hhX\n", (char)*ptr++, (char)*ptr++);
 103   printf("\tgmt_unix_time: %2hhX %2hhX %2hhX %2hhX\n", (char)*ptr++, (char)*ptr++, (char)*ptr++, (char)*ptr++);
 104   printf("\trandom: ");
 105   tmp = ptr + 28;
 106   for(;ptr<tmp;ptr++){printf("%2hhX ", (char)*ptr);}
 107
 108   printf("\n\nHexDump:\n");
 109
 110   int ctr = 0;
 111   for(;begin<end;begin++){printf("%2hhX ",(char)*begin);if(++ctr%10==0){printf("\n");}}
 112   printf("\n\n");
 113 }
 114
 115 int ReadSSLHello(SSL_t *ssl)
 116 {
 117   SSLCiphertext *ct = (SSLCiphertext *)ssl->buffer;
 118
 119   if(ct->type == content_type_alert){
 120     // assuming text is still plaintext
 121     Alert *a = (Alert *)&ct->fragment;
 122     if(a->level == alert_level_fatal){
 123       printf("Fatal Alert %d, connection terminated\n",a->description);
 124       return (1);
 125     }else if(a->level == alert_level_warning){
 126       printf("Warning Alert %d\n", a->description);
 127     }else{
 128       printf("Unknown alert level %d\n", a->level);
 129     }
 130   }else{
 131     printf("SSL type %d\n",ct->type);
 132   }
 133   return (0);
 134 }
 135
 136 #endif