Andrew Boyson / crypto

A simple library to support serving https.

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tls/tls-response.c@21:a6d6e26dd742, 2019-10-16 (annotated)

Committer:
andrewboyson
Date:
Wed Oct 16 17:14:03 2019 +0000
Revision:
21:a6d6e26dd742
Parent:
19:f22327e8be7b
Child:
23:e93d5529b7a6
Removed debug messages

Who changed what in which revision?

UserRevisionLine numberNew contents of line
andrewboyson 21:a6d6e26dd742 1 #include "tls.h"
andrewboyson 10:e269fd7b9500 2 #include "tls-defs.h"
andrewboyson 10:e269fd7b9500 3 #include "tls-connection.h"
andrewboyson 10:e269fd7b9500 4 #include "tls-session.h"
andrewboyson 10:e269fd7b9500 5 #include "tls-log.h"
andrewboyson 10:e269fd7b9500 6 #include "tls-prf.h"
andrewboyson 10:e269fd7b9500 7 #include "ser-cer.h"
andrewboyson 10:e269fd7b9500 8 #include "pri-key.h"
andrewboyson 10:e269fd7b9500 9 #include "log.h"
andrewboyson 18:e3cf22ba2a06 10 #include "tls-aes128cbc-sha.h"
andrewboyson 10:e269fd7b9500 11 #include "random.h"
andrewboyson 10:e269fd7b9500 12 #include "tls-mac.h"
andrewboyson 10:e269fd7b9500 13 #include "http.h"
andrewboyson 10:e269fd7b9500 14
andrewboyson 10:e269fd7b9500 15 void backfillSize(uint8_t* pCurrent, uint8_t* pStart)
andrewboyson 10:e269fd7b9500 16 {
andrewboyson 10:e269fd7b9500 17 int size = pCurrent - pStart - 2;
andrewboyson 10:e269fd7b9500 18 *(pStart + 0) = size >> 8;
andrewboyson 10:e269fd7b9500 19 *(pStart + 1) = size & 0xFF;
andrewboyson 10:e269fd7b9500 20 }
andrewboyson 14:03a0b8fd6ddc 21 void addSize(uint8_t** pp, int size)
andrewboyson 14:03a0b8fd6ddc 22 {
andrewboyson 14:03a0b8fd6ddc 23 uint8_t* p = *pp;
andrewboyson 14:03a0b8fd6ddc 24 *p++ = size >> 8;
andrewboyson 14:03a0b8fd6ddc 25 *p++ = size & 0xFF;
andrewboyson 14:03a0b8fd6ddc 26 *pp = p;
andrewboyson 14:03a0b8fd6ddc 27 }
andrewboyson 14:03a0b8fd6ddc 28 static uint8_t* pHandshakeSize;
andrewboyson 14:03a0b8fd6ddc 29 static uint8_t* pHandshakePayload;
andrewboyson 14:03a0b8fd6ddc 30 static void addHandshakeStart(uint8_t** pp)
andrewboyson 10:e269fd7b9500 31 {
andrewboyson 14:03a0b8fd6ddc 32 uint8_t* p = *pp;
andrewboyson 14:03a0b8fd6ddc 33
andrewboyson 14:03a0b8fd6ddc 34 *p++ = TLS_CONTENT_TYPE_HANDSHAKE;
andrewboyson 14:03a0b8fd6ddc 35 *p++ = 0x03; *p++ = 0x03;
andrewboyson 14:03a0b8fd6ddc 36 pHandshakeSize = p; //Store the position to backfill the handshake size
andrewboyson 14:03a0b8fd6ddc 37 p += 2; //Leave room to backfill the handshake size
andrewboyson 14:03a0b8fd6ddc 38 pHandshakePayload = p; //Record the position of the handshake payload to later calculate the hash
andrewboyson 10:e269fd7b9500 39
andrewboyson 14:03a0b8fd6ddc 40 *pp = p;
andrewboyson 14:03a0b8fd6ddc 41 }
andrewboyson 14:03a0b8fd6ddc 42 static void addHandshakeEnd(uint8_t* p, struct TlsConnection* pConnection)
andrewboyson 14:03a0b8fd6ddc 43 {
andrewboyson 14:03a0b8fd6ddc 44 backfillSize(p, pHandshakeSize);
andrewboyson 14:03a0b8fd6ddc 45 Sha256Add(&pConnection->handshakeSha, pHandshakePayload, p - pHandshakePayload); //Add the handshake hash
andrewboyson 14:03a0b8fd6ddc 46 pConnection->serverSequence++;
andrewboyson 14:03a0b8fd6ddc 47 }
andrewboyson 14:03a0b8fd6ddc 48 static void addHandshakeServerHello(uint8_t** pp, struct TlsConnection* pConnection)
andrewboyson 14:03a0b8fd6ddc 49 {
andrewboyson 21:a6d6e26dd742 50 if (TlsTrace) Log(" sending handshake server hello\r\n");
andrewboyson 14:03a0b8fd6ddc 51 uint8_t* p = *pp;
andrewboyson 14:03a0b8fd6ddc 52
andrewboyson 14:03a0b8fd6ddc 53 *p++ = TLS_HANDSHAKE_SERVER_HELLO;
andrewboyson 10:e269fd7b9500 54 *p++ = 0x00;
andrewboyson 14:03a0b8fd6ddc 55 uint8_t* pSize = p;
andrewboyson 14:03a0b8fd6ddc 56 p += 2;
andrewboyson 14:03a0b8fd6ddc 57 *p++ = 0x03; *p++ = 0x03;
andrewboyson 17:93feb2a51d58 58 for (int i = 0; i < TLS_LENGTH_RANDOM; i++)
andrewboyson 10:e269fd7b9500 59 {
andrewboyson 10:e269fd7b9500 60 uint8_t r = RandomGetByte();
andrewboyson 10:e269fd7b9500 61 pConnection->serverRandom[i] = r;
andrewboyson 14:03a0b8fd6ddc 62 *p++ = r; //32 bit random number
andrewboyson 10:e269fd7b9500 63 }
andrewboyson 14:03a0b8fd6ddc 64 *p++ = 0x04; //SessionId length 4
andrewboyson 14:03a0b8fd6ddc 65 *p++ = pConnection->sessionId >> 24; //Session id
andrewboyson 14:03a0b8fd6ddc 66 *p++ = pConnection->sessionId >> 16; //Session id
andrewboyson 14:03a0b8fd6ddc 67 *p++ = pConnection->sessionId >> 8; //Session id
andrewboyson 14:03a0b8fd6ddc 68 *p++ = pConnection->sessionId >> 0; //Session id
andrewboyson 14:03a0b8fd6ddc 69 *p++ = 0x00; *p++ = 0x2f; //Cipher Suite: TLS_RSA_WITH_AES_128_CBC_SHA (0x002f)
andrewboyson 14:03a0b8fd6ddc 70 *p++ = 0x00; //Compression method none
andrewboyson 14:03a0b8fd6ddc 71 *p++ = 0x00; *p++ = 0x05; //Extensions length (2 bytes) 5 bytes
andrewboyson 14:03a0b8fd6ddc 72 *p++ = 0xff; *p++ = 0x01; //Extension Renegotiation Info
andrewboyson 14:03a0b8fd6ddc 73 *p++ = 0x00; *p++ = 0x01; //1 bytes of "Renegotiation Info" extension data follows
andrewboyson 14:03a0b8fd6ddc 74 *p++ = 0x00; //length is zero, because this is a new connection
andrewboyson 14:03a0b8fd6ddc 75 backfillSize(p, pSize);
andrewboyson 10:e269fd7b9500 76
andrewboyson 14:03a0b8fd6ddc 77 *pp = p;
andrewboyson 14:03a0b8fd6ddc 78 }
andrewboyson 14:03a0b8fd6ddc 79 static void addHandshakeCertificate(uint8_t** pp)
andrewboyson 14:03a0b8fd6ddc 80 {
andrewboyson 14:03a0b8fd6ddc 81 uint8_t* p = *pp;
andrewboyson 14:03a0b8fd6ddc 82
andrewboyson 14:03a0b8fd6ddc 83 *p++ = TLS_HANDSHAKE_CERTIFICATE; *p++ = 0x00;
andrewboyson 13:0a80b49a5e78 84 addSize(&p, SerCerSize + 6); *p++ = 0x00; //Size of this handshake
andrewboyson 13:0a80b49a5e78 85 addSize(&p, SerCerSize + 3); *p++ = 0x00; //Size of all certificates
andrewboyson 13:0a80b49a5e78 86 addSize(&p, SerCerSize ); //Size of first certificate
andrewboyson 10:e269fd7b9500 87 for (int i = 0; i < SerCerSize; i++) *p++ = SerCerData[i]; //Certificate
andrewboyson 10:e269fd7b9500 88
andrewboyson 14:03a0b8fd6ddc 89 *pp = p;
andrewboyson 14:03a0b8fd6ddc 90 }
andrewboyson 14:03a0b8fd6ddc 91 static void addHandshakeServerHelloDone(uint8_t** pp)
andrewboyson 14:03a0b8fd6ddc 92 {
andrewboyson 21:a6d6e26dd742 93 if (TlsTrace) LogTime(" sending handshake server hello done\r\n");
andrewboyson 14:03a0b8fd6ddc 94 uint8_t* p = *pp;
andrewboyson 10:e269fd7b9500 95
andrewboyson 14:03a0b8fd6ddc 96 *p++ = TLS_HANDSHAKE_SERVER_HELLO_DONE; *p++ = 0x00;
andrewboyson 14:03a0b8fd6ddc 97 addSize(&p, 0);
andrewboyson 14:03a0b8fd6ddc 98
andrewboyson 14:03a0b8fd6ddc 99 *pp = p;
andrewboyson 10:e269fd7b9500 100 }
andrewboyson 14:03a0b8fd6ddc 101 static void addHandshakeFinished(uint8_t** pp, struct TlsConnection* pConnection, struct TlsSession* pSession)
andrewboyson 10:e269fd7b9500 102 {
andrewboyson 21:a6d6e26dd742 103 if (TlsTrace) LogTime(" sending handshake finished\r\n");
andrewboyson 14:03a0b8fd6ddc 104 uint8_t* p = *pp;
andrewboyson 10:e269fd7b9500 105
andrewboyson 18:e3cf22ba2a06 106 TlsAes128CbcSha1EncryptStart(&p);
andrewboyson 15:4ddb73b5fea1 107
andrewboyson 16:7eeb5f6626ad 108 //Make the 'finished' handshake which is part of the payload to be encrypted
andrewboyson 15:4ddb73b5fea1 109 *p++ = TLS_HANDSHAKE_FINISHED;
andrewboyson 15:4ddb73b5fea1 110 *p++ = 0x00;
andrewboyson 15:4ddb73b5fea1 111 *p++ = 0x00;
andrewboyson 17:93feb2a51d58 112 *p++ = TLS_LENGTH_VERIFY; //Length 12
andrewboyson 15:4ddb73b5fea1 113
andrewboyson 10:e269fd7b9500 114 //Hash over all handshake payloads exchanged so far
andrewboyson 17:93feb2a51d58 115 uint8_t hash[SHA256_HASH_SIZE];
andrewboyson 10:e269fd7b9500 116 Sha256Finish(&pConnection->handshakeSha, hash);
andrewboyson 10:e269fd7b9500 117
andrewboyson 10:e269fd7b9500 118 //Make verify data
andrewboyson 15:4ddb73b5fea1 119 TlsPrfServerFinished(pSession->masterSecret, hash, p); //Hash over all handshakes
andrewboyson 17:93feb2a51d58 120 p += TLS_LENGTH_VERIFY;
andrewboyson 10:e269fd7b9500 121
andrewboyson 18:e3cf22ba2a06 122 TlsAes128CbcSha1EncryptEnd(&p, pConnection, TLS_CONTENT_TYPE_HANDSHAKE);
andrewboyson 14:03a0b8fd6ddc 123
andrewboyson 14:03a0b8fd6ddc 124 *pp = p;
andrewboyson 14:03a0b8fd6ddc 125 }
andrewboyson 14:03a0b8fd6ddc 126 static void addChangeCipher(uint8_t** pp, struct TlsConnection* pConnection)
andrewboyson 14:03a0b8fd6ddc 127 {
andrewboyson 21:a6d6e26dd742 128 if (TlsTrace) LogTime(" sending change cipher\r\n");
andrewboyson 14:03a0b8fd6ddc 129 uint8_t* p = *pp;
andrewboyson 14:03a0b8fd6ddc 130
andrewboyson 14:03a0b8fd6ddc 131 *p++ = TLS_CONTENT_TYPE_CHANGE_CIPHER; //Content is change cipher
andrewboyson 14:03a0b8fd6ddc 132 *p++ = 0x03; *p++ = 0x03; //Legacy TLS version
andrewboyson 14:03a0b8fd6ddc 133 *p++ = 0x00; *p++ = 0x01; //Change cipher Length (2 bytes)
andrewboyson 14:03a0b8fd6ddc 134 *p++ = 0x01; //Change cipher message 1
andrewboyson 10:e269fd7b9500 135
andrewboyson 14:03a0b8fd6ddc 136 //Record that all outgoing messages are now encrypted
andrewboyson 14:03a0b8fd6ddc 137 pConnection->serverEncrypted = true;
andrewboyson 14:03a0b8fd6ddc 138 pConnection->serverSequence = 0;
andrewboyson 14:03a0b8fd6ddc 139
andrewboyson 14:03a0b8fd6ddc 140 *pp = p;
andrewboyson 14:03a0b8fd6ddc 141 }
andrewboyson 14:03a0b8fd6ddc 142 static void addAlert(uint8_t** pp, struct TlsConnection* pConnection, uint8_t level, uint8_t description)
andrewboyson 14:03a0b8fd6ddc 143 {
andrewboyson 21:a6d6e26dd742 144 if (TlsTrace) LogTime(" sending alert\r\n");
andrewboyson 14:03a0b8fd6ddc 145 Log (" - "); TlsLogAlertLevel(level); Log(": "); TlsLogAlertDescription(description); Log("\r\n");
andrewboyson 14:03a0b8fd6ddc 146
andrewboyson 14:03a0b8fd6ddc 147 uint8_t* p = *pp;
andrewboyson 14:03a0b8fd6ddc 148
andrewboyson 14:03a0b8fd6ddc 149 *p++ = TLS_CONTENT_TYPE_ALERT;
andrewboyson 14:03a0b8fd6ddc 150 *p++ = 0x03; *p++ = 0x03;
andrewboyson 14:03a0b8fd6ddc 151 addSize(&p, 2);
andrewboyson 14:03a0b8fd6ddc 152 *p++ = level;
andrewboyson 14:03a0b8fd6ddc 153 *p++ = description;
andrewboyson 14:03a0b8fd6ddc 154
andrewboyson 10:e269fd7b9500 155 pConnection->serverSequence++;
andrewboyson 14:03a0b8fd6ddc 156
andrewboyson 14:03a0b8fd6ddc 157 *pp = p;
andrewboyson 14:03a0b8fd6ddc 158 }
andrewboyson 14:03a0b8fd6ddc 159 static void sendServerHelloNew(struct TlsConnection* pConnection, struct TlsSession* pSession, int* pWindowSize, uint8_t* pWindow, uint32_t positionOfWindowInStream)
andrewboyson 14:03a0b8fd6ddc 160 {
andrewboyson 14:03a0b8fd6ddc 161 uint8_t* p = pWindow;
andrewboyson 14:03a0b8fd6ddc 162
andrewboyson 14:03a0b8fd6ddc 163 addHandshakeStart (&p);
andrewboyson 14:03a0b8fd6ddc 164 addHandshakeServerHello (&p, pConnection);
andrewboyson 14:03a0b8fd6ddc 165 addHandshakeCertificate (&p);
andrewboyson 14:03a0b8fd6ddc 166 addHandshakeServerHelloDone(&p);
andrewboyson 14:03a0b8fd6ddc 167 addHandshakeEnd ( p, pConnection);
andrewboyson 14:03a0b8fd6ddc 168
andrewboyson 10:e269fd7b9500 169 *pWindowSize = p - pWindow;
andrewboyson 10:e269fd7b9500 170 pConnection->serverPositionInStreamOffset = positionOfWindowInStream + *pWindowSize;
andrewboyson 10:e269fd7b9500 171 }
andrewboyson 14:03a0b8fd6ddc 172 static void sendServerHelloResume(struct TlsConnection* pConnection, struct TlsSession* pSession, int* pWindowSize, uint8_t* pWindow, uint32_t positionOfWindowInStream)
andrewboyson 10:e269fd7b9500 173 {
andrewboyson 10:e269fd7b9500 174 uint8_t* p = pWindow;
andrewboyson 14:03a0b8fd6ddc 175
andrewboyson 14:03a0b8fd6ddc 176 addHandshakeStart (&p);
andrewboyson 14:03a0b8fd6ddc 177 addHandshakeServerHello(&p, pConnection);
andrewboyson 14:03a0b8fd6ddc 178 addHandshakeEnd ( p, pConnection);
andrewboyson 10:e269fd7b9500 179
andrewboyson 19:f22327e8be7b 180 TlsPrfKeysAes128Sha1(pSession->masterSecret, pConnection->clientRandom, pConnection->serverRandom, pConnection->clientMacKey,
andrewboyson 19:f22327e8be7b 181 pConnection->serverMacKey,
andrewboyson 19:f22327e8be7b 182 pConnection->clientWriteKey,
andrewboyson 19:f22327e8be7b 183 pConnection->serverWriteKey);
andrewboyson 14:03a0b8fd6ddc 184
andrewboyson 14:03a0b8fd6ddc 185 addChangeCipher (&p, pConnection);
andrewboyson 14:03a0b8fd6ddc 186
andrewboyson 14:03a0b8fd6ddc 187 addHandshakeStart (&p);
andrewboyson 14:03a0b8fd6ddc 188 addHandshakeFinished (&p, pConnection, pSession);
andrewboyson 14:03a0b8fd6ddc 189 addHandshakeEnd ( p, pConnection);
andrewboyson 10:e269fd7b9500 190
andrewboyson 10:e269fd7b9500 191 *pWindowSize = p - pWindow;
andrewboyson 14:03a0b8fd6ddc 192 pConnection->serverPositionInStreamOffset = positionOfWindowInStream + *pWindowSize;
andrewboyson 14:03a0b8fd6ddc 193 }
andrewboyson 14:03a0b8fd6ddc 194 static void sendServerChange(struct TlsConnection* pConnection, struct TlsSession* pSession, int* pWindowSize, uint8_t* pWindow, uint32_t positionOfWindowInStream)
andrewboyson 14:03a0b8fd6ddc 195 {
andrewboyson 14:03a0b8fd6ddc 196 uint8_t* p = pWindow;
andrewboyson 14:03a0b8fd6ddc 197
andrewboyson 14:03a0b8fd6ddc 198 addChangeCipher(&p, pConnection);
andrewboyson 14:03a0b8fd6ddc 199
andrewboyson 14:03a0b8fd6ddc 200 addHandshakeStart (&p);
andrewboyson 14:03a0b8fd6ddc 201 addHandshakeFinished(&p, pConnection, pSession);
andrewboyson 14:03a0b8fd6ddc 202 addHandshakeEnd ( p, pConnection);
andrewboyson 14:03a0b8fd6ddc 203
andrewboyson 14:03a0b8fd6ddc 204 *pWindowSize = p - pWindow;
andrewboyson 14:03a0b8fd6ddc 205 pConnection->serverPositionInStreamOffset = positionOfWindowInStream + *pWindowSize;
andrewboyson 14:03a0b8fd6ddc 206 }
andrewboyson 14:03a0b8fd6ddc 207 static void sendFatal(uint8_t description, struct TlsConnection* pConnection, int* pWindowSize, uint8_t* pWindow, uint32_t positionOfWindowInStream)
andrewboyson 14:03a0b8fd6ddc 208 {
andrewboyson 14:03a0b8fd6ddc 209 uint8_t* p = pWindow;
andrewboyson 14:03a0b8fd6ddc 210
andrewboyson 14:03a0b8fd6ddc 211 addAlert(&p, pConnection, TLS_ALERT_FATAL, description);
andrewboyson 14:03a0b8fd6ddc 212
andrewboyson 14:03a0b8fd6ddc 213 *pWindowSize = p - pWindow;
andrewboyson 14:03a0b8fd6ddc 214 pConnection->serverPositionInStreamOffset = positionOfWindowInStream + *pWindowSize;
andrewboyson 10:e269fd7b9500 215 }
andrewboyson 10:e269fd7b9500 216 static bool sendContent(struct TlsConnection* pConnection, int* pWindowSize, uint8_t* pWindow, uint32_t positionOfWindowInStream)
andrewboyson 10:e269fd7b9500 217 {
andrewboyson 10:e269fd7b9500 218 //Start
andrewboyson 21:a6d6e26dd742 219 if (TlsTrace)
andrewboyson 21:a6d6e26dd742 220 {
andrewboyson 21:a6d6e26dd742 221 LogTime(" adding application content\r\n");
andrewboyson 21:a6d6e26dd742 222 LogF("- available window size %d\r\n", *pWindowSize);
andrewboyson 21:a6d6e26dd742 223 LogF("- position of window in stream %d\r\n", positionOfWindowInStream);
andrewboyson 21:a6d6e26dd742 224 }
andrewboyson 10:e269fd7b9500 225 uint8_t* p = pWindow;
andrewboyson 13:0a80b49a5e78 226 *p++ = TLS_CONTENT_TYPE_APPLICATION;
andrewboyson 10:e269fd7b9500 227 *p++ = 0x03; *p++ = 0x03;
andrewboyson 10:e269fd7b9500 228
andrewboyson 10:e269fd7b9500 229 //Prepare a place to backfill the size
andrewboyson 10:e269fd7b9500 230 uint8_t* pBackfillSize = p;
andrewboyson 10:e269fd7b9500 231 *p++ = 0; *p++ = 0;
andrewboyson 10:e269fd7b9500 232
andrewboyson 18:e3cf22ba2a06 233 TlsAes128CbcSha1EncryptStart(&p);
andrewboyson 10:e269fd7b9500 234
andrewboyson 10:e269fd7b9500 235 //Add the plain payload
andrewboyson 18:e3cf22ba2a06 236 int payloadSize = *pWindowSize - 5 - TLS_AES_128_CBC_SHA1_MAX_OVERHEAD;
andrewboyson 21:a6d6e26dd742 237 if (TlsTrace) LogF("- available payload size %d\r\n", payloadSize);
andrewboyson 10:e269fd7b9500 238 uint32_t positionOfPayloadInStream = positionOfWindowInStream - pConnection->serverPositionInStreamOffset;
andrewboyson 21:a6d6e26dd742 239 if (TlsTrace) LogF("- position of payload in stream %d\r\n", positionOfPayloadInStream);
andrewboyson 16:7eeb5f6626ad 240 bool finished = HttpAdd(pConnection->id, &payloadSize, (char*)p, positionOfPayloadInStream); //Return whatever HTTP would be
andrewboyson 21:a6d6e26dd742 241 if (TlsTrace) LogF("- resulting payload size %d\r\n", payloadSize);
andrewboyson 16:7eeb5f6626ad 242 p += payloadSize;
andrewboyson 10:e269fd7b9500 243
andrewboyson 18:e3cf22ba2a06 244 TlsAes128CbcSha1EncryptEnd(&p, pConnection, TLS_CONTENT_TYPE_APPLICATION);
andrewboyson 10:e269fd7b9500 245
andrewboyson 10:e269fd7b9500 246 //Backfill the size
andrewboyson 10:e269fd7b9500 247 backfillSize(p, pBackfillSize);
andrewboyson 10:e269fd7b9500 248
andrewboyson 16:7eeb5f6626ad 249 //Finalise
andrewboyson 16:7eeb5f6626ad 250 pConnection->serverSequence++;
andrewboyson 10:e269fd7b9500 251 *pWindowSize = p - pWindow;
andrewboyson 21:a6d6e26dd742 252 if (TlsTrace) LogF("- resulting window size %d\r\n", *pWindowSize);
andrewboyson 16:7eeb5f6626ad 253 pConnection->serverPositionInStreamOffset += *pWindowSize - payloadSize;
andrewboyson 10:e269fd7b9500 254
andrewboyson 10:e269fd7b9500 255 return finished;
andrewboyson 10:e269fd7b9500 256 }
andrewboyson 10:e269fd7b9500 257 bool TlsResponse(int connectionId, bool clientFinished, int* pWindowSize, uint8_t* pWindow, uint32_t positionOfWindowInStream)
andrewboyson 10:e269fd7b9500 258 {
andrewboyson 10:e269fd7b9500 259 struct TlsConnection* pConnection = TlsConnectionOrNull(connectionId);
andrewboyson 10:e269fd7b9500 260 if (!pConnection)
andrewboyson 10:e269fd7b9500 261 {
andrewboyson 10:e269fd7b9500 262 *pWindowSize = 0;
andrewboyson 10:e269fd7b9500 263 return false;
andrewboyson 10:e269fd7b9500 264 }
andrewboyson 10:e269fd7b9500 265
andrewboyson 10:e269fd7b9500 266 if (!pConnection->sessionId)
andrewboyson 10:e269fd7b9500 267 {
andrewboyson 10:e269fd7b9500 268 *pWindowSize = 0;
andrewboyson 10:e269fd7b9500 269 return false;
andrewboyson 10:e269fd7b9500 270 }
andrewboyson 10:e269fd7b9500 271
andrewboyson 10:e269fd7b9500 272 struct TlsSession* pSession = TlsSessionOrNull(pConnection->sessionId);
andrewboyson 10:e269fd7b9500 273 if (!pSession)
andrewboyson 10:e269fd7b9500 274 {
andrewboyson 10:e269fd7b9500 275 LogTimeF("TlsPoll - invalid session %u\r\n", pConnection->sessionId);
andrewboyson 10:e269fd7b9500 276 *pWindowSize = 0;
andrewboyson 10:e269fd7b9500 277 return false;
andrewboyson 10:e269fd7b9500 278 }
andrewboyson 10:e269fd7b9500 279
andrewboyson 10:e269fd7b9500 280 switch (pConnection->toDo)
andrewboyson 10:e269fd7b9500 281 {
andrewboyson 10:e269fd7b9500 282 case DO_WAIT_CLIENT_HELLO:
andrewboyson 10:e269fd7b9500 283 case DO_WAIT_CLIENT_CHANGE:
andrewboyson 10:e269fd7b9500 284 case DO_WAIT_DECRYPT_MASTER_SECRET:
andrewboyson 10:e269fd7b9500 285 *pWindowSize = 0;
andrewboyson 10:e269fd7b9500 286 if (clientFinished) return true; //The client hasn't made a request and never will so finish
andrewboyson 10:e269fd7b9500 287 else return false; //The client hasn't made a request yet but it could.
andrewboyson 10:e269fd7b9500 288
andrewboyson 14:03a0b8fd6ddc 289 case DO_SEND_SERVER_HELLO_NEW:
andrewboyson 14:03a0b8fd6ddc 290 sendServerHelloNew(pConnection, pSession, pWindowSize, pWindow, positionOfWindowInStream);
andrewboyson 14:03a0b8fd6ddc 291 pConnection->toDo = DO_WAIT_CLIENT_CHANGE;
andrewboyson 14:03a0b8fd6ddc 292 return false; //Not finished
andrewboyson 14:03a0b8fd6ddc 293
andrewboyson 14:03a0b8fd6ddc 294 case DO_SEND_SERVER_HELLO_RESUME:
andrewboyson 14:03a0b8fd6ddc 295 sendServerHelloResume(pConnection, pSession, pWindowSize, pWindow, positionOfWindowInStream);
andrewboyson 10:e269fd7b9500 296 pConnection->toDo = DO_WAIT_CLIENT_CHANGE;
andrewboyson 10:e269fd7b9500 297 return false; //Not finished
andrewboyson 10:e269fd7b9500 298
andrewboyson 10:e269fd7b9500 299 case DO_SEND_SERVER_CHANGE:
andrewboyson 10:e269fd7b9500 300 sendServerChange(pConnection, pSession, pWindowSize, pWindow, positionOfWindowInStream);
andrewboyson 10:e269fd7b9500 301 pConnection->toDo = DO_APPLICATION;
andrewboyson 10:e269fd7b9500 302 return false;
andrewboyson 10:e269fd7b9500 303
andrewboyson 10:e269fd7b9500 304 case DO_APPLICATION:
andrewboyson 10:e269fd7b9500 305 {
andrewboyson 10:e269fd7b9500 306 int status = HttpPoll(connectionId, clientFinished);
andrewboyson 10:e269fd7b9500 307 bool finished;
andrewboyson 10:e269fd7b9500 308 switch (status)
andrewboyson 10:e269fd7b9500 309 {
andrewboyson 10:e269fd7b9500 310 case HTTP_WAIT: finished = false; *pWindowSize = 0; break;
andrewboyson 10:e269fd7b9500 311 case HTTP_FINISHED: finished = true; *pWindowSize = 0; break;
andrewboyson 10:e269fd7b9500 312 case HTTP_HAVE_SOMETHING_TO_SEND: finished = sendContent(pConnection, pWindowSize, pWindow, positionOfWindowInStream); break;
andrewboyson 10:e269fd7b9500 313 }
andrewboyson 10:e269fd7b9500 314 if (finished) pConnection->toDo = DO_WAIT_CLIENT_HELLO;
andrewboyson 10:e269fd7b9500 315 return finished;
andrewboyson 10:e269fd7b9500 316 }
andrewboyson 10:e269fd7b9500 317 case DO_SEND_ALERT_ILLEGAL_PARAMETER:
andrewboyson 14:03a0b8fd6ddc 318 sendFatal(TLS_ALERT_ILLEGAL_PARAMETER, pConnection, pWindowSize, pWindow, positionOfWindowInStream);
andrewboyson 10:e269fd7b9500 319 pConnection->toDo = DO_WAIT_CLIENT_HELLO;
andrewboyson 10:e269fd7b9500 320 return true; //Finished
andrewboyson 10:e269fd7b9500 321
andrewboyson 10:e269fd7b9500 322 case DO_SEND_ALERT_INTERNAL_ERROR:
andrewboyson 14:03a0b8fd6ddc 323 sendFatal(TLS_ALERT_INTERNAL_ERROR, pConnection, pWindowSize, pWindow, positionOfWindowInStream);
andrewboyson 10:e269fd7b9500 324 pConnection->toDo = DO_WAIT_CLIENT_HELLO;
andrewboyson 10:e269fd7b9500 325 return true; //Finished
andrewboyson 10:e269fd7b9500 326
andrewboyson 10:e269fd7b9500 327 default:
andrewboyson 10:e269fd7b9500 328 LogTimeF("TlsPoll - unspecified TLS state %d\r\n", pConnection->toDo);
andrewboyson 14:03a0b8fd6ddc 329 sendFatal(TLS_ALERT_INTERNAL_ERROR, pConnection, pWindowSize, pWindow, positionOfWindowInStream); //Internal error
andrewboyson 10:e269fd7b9500 330 pConnection->toDo = DO_WAIT_CLIENT_HELLO;
andrewboyson 10:e269fd7b9500 331 return true; //Finished
andrewboyson 10:e269fd7b9500 332 }
andrewboyson 10:e269fd7b9500 333 }