A simple library to support serving https.
Dependents: oldheating gps motorhome heating
tls/tls-request.c@19:f22327e8be7b, 2019-10-15 (annotated)
- Committer:
- andrewboyson
- Date:
- Tue Oct 15 07:26:15 2019 +0000
- Revision:
- 19:f22327e8be7b
- Parent:
- 18:e3cf22ba2a06
- Child:
- 21:a6d6e26dd742
Pulled AES128_CBC_SHA1 into its own routines to keep it apart from future work.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
andrewboyson | 2:82268409e83f | 1 | #include "tls.h" |
andrewboyson | 2:82268409e83f | 2 | #include "tls-defs.h" |
andrewboyson | 5:ee5489ee1117 | 3 | #include "tls-connection.h" |
andrewboyson | 2:82268409e83f | 4 | #include "tls-session.h" |
andrewboyson | 2:82268409e83f | 5 | #include "tls-log.h" |
andrewboyson | 8:5e66a6b4b38c | 6 | #include "tls-prf.h" |
andrewboyson | 2:82268409e83f | 7 | #include "mstimer.h" |
andrewboyson | 2:82268409e83f | 8 | #include "log.h" |
andrewboyson | 2:82268409e83f | 9 | #include "pri-key.h" |
andrewboyson | 18:e3cf22ba2a06 | 10 | #include "tls-aes128cbc-sha.h" |
andrewboyson | 9:f354b4859b0b | 11 | #include "tls-mac.h" |
andrewboyson | 8:5e66a6b4b38c | 12 | #include "led.h" |
andrewboyson | 9:f354b4859b0b | 13 | #include "http.h" |
andrewboyson | 2:82268409e83f | 14 | |
andrewboyson | 14:03a0b8fd6ddc | 15 | static void handleClientHello(int length, uint8_t* pBuffer, struct TlsConnection* pConnection) |
andrewboyson | 5:ee5489ee1117 | 16 | { |
andrewboyson | 2:82268409e83f | 17 | //Check things look ok |
andrewboyson | 4:6a1d887f1cad | 18 | uint8_t* p = pBuffer; |
andrewboyson | 2:82268409e83f | 19 | if (length < 100) |
andrewboyson | 2:82268409e83f | 20 | { |
andrewboyson | 2:82268409e83f | 21 | LogF("TLS - %d byte client hello message is not at least 100 bytes long\r\n", length); |
andrewboyson | 14:03a0b8fd6ddc | 22 | pConnection->toDo = DO_SEND_ALERT_ILLEGAL_PARAMETER; |
andrewboyson | 14:03a0b8fd6ddc | 23 | return; |
andrewboyson | 2:82268409e83f | 24 | } |
andrewboyson | 4:6a1d887f1cad | 25 | |
andrewboyson | 14:03a0b8fd6ddc | 26 | //get the version |
andrewboyson | 4:6a1d887f1cad | 27 | uint8_t versionH = *p++; |
andrewboyson | 4:6a1d887f1cad | 28 | uint8_t versionL = *p++; |
andrewboyson | 2:82268409e83f | 29 | |
andrewboyson | 14:03a0b8fd6ddc | 30 | //Get the client random |
andrewboyson | 6:819c17738dc2 | 31 | for (int i = 0; i < 32; i++) pConnection->clientRandom[i] = *p++; |
andrewboyson | 2:82268409e83f | 32 | |
andrewboyson | 14:03a0b8fd6ddc | 33 | //Get the session id |
andrewboyson | 2:82268409e83f | 34 | int sessionIdLength = *p++; |
andrewboyson | 4:6a1d887f1cad | 35 | uint8_t* pSessionId = p; |
andrewboyson | 2:82268409e83f | 36 | |
andrewboyson | 10:e269fd7b9500 | 37 | if (sessionIdLength == 4) |
andrewboyson | 2:82268409e83f | 38 | { |
andrewboyson | 10:e269fd7b9500 | 39 | pConnection->sessionId = *p++; |
andrewboyson | 10:e269fd7b9500 | 40 | pConnection->sessionId <<= 8; |
andrewboyson | 10:e269fd7b9500 | 41 | pConnection->sessionId |= *p++; |
andrewboyson | 10:e269fd7b9500 | 42 | pConnection->sessionId <<= 8; |
andrewboyson | 10:e269fd7b9500 | 43 | pConnection->sessionId |= *p++; |
andrewboyson | 10:e269fd7b9500 | 44 | pConnection->sessionId <<= 8; |
andrewboyson | 10:e269fd7b9500 | 45 | pConnection->sessionId |= *p++; |
andrewboyson | 2:82268409e83f | 46 | } |
andrewboyson | 10:e269fd7b9500 | 47 | else |
andrewboyson | 10:e269fd7b9500 | 48 | { |
andrewboyson | 10:e269fd7b9500 | 49 | pConnection->sessionId = 0; |
andrewboyson | 10:e269fd7b9500 | 50 | p += sessionIdLength; |
andrewboyson | 10:e269fd7b9500 | 51 | } |
andrewboyson | 14:03a0b8fd6ddc | 52 | |
andrewboyson | 14:03a0b8fd6ddc | 53 | //Work out from the session id if this connection can be resumed from an existing session |
andrewboyson | 14:03a0b8fd6ddc | 54 | struct TlsSession* pSession = TlsSessionOrNull(pConnection->sessionId); |
andrewboyson | 14:03a0b8fd6ddc | 55 | //pSession = NULL; |
andrewboyson | 14:03a0b8fd6ddc | 56 | pConnection->resume = pSession && pSession->valid; |
andrewboyson | 14:03a0b8fd6ddc | 57 | |
andrewboyson | 14:03a0b8fd6ddc | 58 | //If it cannot be resumed then create a new one |
andrewboyson | 14:03a0b8fd6ddc | 59 | if (!pConnection->resume) |
andrewboyson | 10:e269fd7b9500 | 60 | { |
andrewboyson | 10:e269fd7b9500 | 61 | pSession = TlsSessionNew(); |
andrewboyson | 10:e269fd7b9500 | 62 | pConnection->sessionId = pSession->id; |
andrewboyson | 10:e269fd7b9500 | 63 | } |
andrewboyson | 2:82268409e83f | 64 | |
andrewboyson | 2:82268409e83f | 65 | pSession->lastUsed = MsTimerCount; |
andrewboyson | 2:82268409e83f | 66 | |
andrewboyson | 2:82268409e83f | 67 | //Log the parameters |
andrewboyson | 2:82268409e83f | 68 | if (TlsTrace) |
andrewboyson | 2:82268409e83f | 69 | { |
andrewboyson | 2:82268409e83f | 70 | LogF("- client version HH:LL: %02x:%02x\r\n", versionH, versionL); |
andrewboyson | 17:93feb2a51d58 | 71 | Log ("- client random:\r\n"); LogBytesAsHex(pConnection->clientRandom, TLS_LENGTH_RANDOM); Log("\r\n"); |
andrewboyson | 2:82268409e83f | 72 | Log ("- client session id:\r\n"); LogBytesAsHex(pSessionId, sessionIdLength); Log("\r\n"); |
andrewboyson | 10:e269fd7b9500 | 73 | LogF("- session index: %u\r\n", pConnection->sessionId); |
andrewboyson | 14:03a0b8fd6ddc | 74 | if (pConnection->resume) Log ("- existing session so resume\r\n"); |
andrewboyson | 14:03a0b8fd6ddc | 75 | else Log ("- new session\r\n"); |
andrewboyson | 2:82268409e83f | 76 | } |
andrewboyson | 14:03a0b8fd6ddc | 77 | |
andrewboyson | 14:03a0b8fd6ddc | 78 | if (pConnection->resume) pConnection->toDo = DO_SEND_SERVER_HELLO_RESUME; |
andrewboyson | 14:03a0b8fd6ddc | 79 | else pConnection->toDo = DO_SEND_SERVER_HELLO_NEW; |
andrewboyson | 14:03a0b8fd6ddc | 80 | |
andrewboyson | 14:03a0b8fd6ddc | 81 | return; |
andrewboyson | 2:82268409e83f | 82 | } |
andrewboyson | 14:03a0b8fd6ddc | 83 | static void handleClientKeyExchange(int length, uint8_t* pBuffer, struct TlsConnection* pConnection) //returns 0 on success; -1 on error |
andrewboyson | 2:82268409e83f | 84 | { |
andrewboyson | 10:e269fd7b9500 | 85 | struct TlsSession* pSession = TlsSessionOrNull(pConnection->sessionId); |
andrewboyson | 5:ee5489ee1117 | 86 | if (!pSession) |
andrewboyson | 5:ee5489ee1117 | 87 | { |
andrewboyson | 10:e269fd7b9500 | 88 | LogTimeF("handleClientKeyExchange - invalid session %u\r\n", pConnection->sessionId); |
andrewboyson | 14:03a0b8fd6ddc | 89 | pConnection->toDo = DO_SEND_ALERT_ILLEGAL_PARAMETER; |
andrewboyson | 14:03a0b8fd6ddc | 90 | return; |
andrewboyson | 5:ee5489ee1117 | 91 | } |
andrewboyson | 2:82268409e83f | 92 | |
andrewboyson | 2:82268409e83f | 93 | if (length != 130) |
andrewboyson | 2:82268409e83f | 94 | { |
andrewboyson | 2:82268409e83f | 95 | LogF("TLS - %d byte client key exchange message is not 130 bytes long\r\n", length); |
andrewboyson | 14:03a0b8fd6ddc | 96 | pConnection->toDo = DO_SEND_ALERT_ILLEGAL_PARAMETER; |
andrewboyson | 14:03a0b8fd6ddc | 97 | return; |
andrewboyson | 2:82268409e83f | 98 | } |
andrewboyson | 2:82268409e83f | 99 | int premasterLength = pBuffer[0] << 8 | pBuffer[1]; //Overall length 2 bytes |
andrewboyson | 2:82268409e83f | 100 | if (premasterLength != 128) |
andrewboyson | 2:82268409e83f | 101 | { |
andrewboyson | 2:82268409e83f | 102 | LogF("TLS - %d byte encrypted pre master secret is not 128 bytes long\r\n", length); |
andrewboyson | 14:03a0b8fd6ddc | 103 | pConnection->toDo = DO_SEND_ALERT_ILLEGAL_PARAMETER; |
andrewboyson | 14:03a0b8fd6ddc | 104 | return; |
andrewboyson | 2:82268409e83f | 105 | } |
andrewboyson | 4:6a1d887f1cad | 106 | uint8_t* pEncryptedPreMasterSecret = pBuffer + 2; |
andrewboyson | 14:03a0b8fd6ddc | 107 | pConnection->slotPriKeyDecryption = PriKeyDecryptStart(pEncryptedPreMasterSecret); |
andrewboyson | 2:82268409e83f | 108 | |
andrewboyson | 2:82268409e83f | 109 | if (TlsTrace) |
andrewboyson | 2:82268409e83f | 110 | { |
andrewboyson | 2:82268409e83f | 111 | LogF("- encrypted pre master\r\n", premasterLength); |
andrewboyson | 2:82268409e83f | 112 | LogBytesAsHex(pEncryptedPreMasterSecret, 128); |
andrewboyson | 2:82268409e83f | 113 | Log("\r\n"); |
andrewboyson | 2:82268409e83f | 114 | } |
andrewboyson | 2:82268409e83f | 115 | |
andrewboyson | 14:03a0b8fd6ddc | 116 | pConnection->toDo = DO_WAIT_DECRYPT_MASTER_SECRET; |
andrewboyson | 14:03a0b8fd6ddc | 117 | return; |
andrewboyson | 2:82268409e83f | 118 | } |
andrewboyson | 14:03a0b8fd6ddc | 119 | static void handleClientFinished(int length, uint8_t* pBuffer, struct TlsConnection* pConnection) //returns 0 on success; -1 on error |
andrewboyson | 8:5e66a6b4b38c | 120 | { |
andrewboyson | 10:e269fd7b9500 | 121 | struct TlsSession* pSession = TlsSessionOrNull(pConnection->sessionId); |
andrewboyson | 8:5e66a6b4b38c | 122 | if (!pSession) |
andrewboyson | 8:5e66a6b4b38c | 123 | { |
andrewboyson | 10:e269fd7b9500 | 124 | LogTimeF("handleClientKeyExchange - invalid session %u\r\n", pConnection->sessionId); |
andrewboyson | 14:03a0b8fd6ddc | 125 | pConnection->toDo = DO_SEND_ALERT_ILLEGAL_PARAMETER; |
andrewboyson | 14:03a0b8fd6ddc | 126 | return; |
andrewboyson | 8:5e66a6b4b38c | 127 | } |
andrewboyson | 8:5e66a6b4b38c | 128 | |
andrewboyson | 8:5e66a6b4b38c | 129 | //Calculate the verify message |
andrewboyson | 17:93feb2a51d58 | 130 | uint8_t verify[TLS_LENGTH_VERIFY]; |
andrewboyson | 8:5e66a6b4b38c | 131 | TlsPrfClientFinished(pSession->masterSecret, pConnection->clientHandshakeHash, verify); |
andrewboyson | 8:5e66a6b4b38c | 132 | Log("- verify handshake\r\n"); |
andrewboyson | 17:93feb2a51d58 | 133 | LogBytesAsHex(verify, TLS_LENGTH_VERIFY); |
andrewboyson | 8:5e66a6b4b38c | 134 | Log("\r\n"); |
andrewboyson | 8:5e66a6b4b38c | 135 | |
andrewboyson | 14:03a0b8fd6ddc | 136 | if (pConnection->resume) pConnection->toDo = DO_APPLICATION; |
andrewboyson | 14:03a0b8fd6ddc | 137 | else pConnection->toDo = DO_SEND_SERVER_CHANGE; |
andrewboyson | 14:03a0b8fd6ddc | 138 | |
andrewboyson | 14:03a0b8fd6ddc | 139 | return; |
andrewboyson | 8:5e66a6b4b38c | 140 | } |
andrewboyson | 6:819c17738dc2 | 141 | static void changeCipher(int length, uint8_t* pBuffer, struct TlsConnection* pConnection) |
andrewboyson | 6:819c17738dc2 | 142 | { |
andrewboyson | 6:819c17738dc2 | 143 | uint8_t message = pBuffer[0]; |
andrewboyson | 6:819c17738dc2 | 144 | if (TlsTrace) |
andrewboyson | 6:819c17738dc2 | 145 | { |
andrewboyson | 6:819c17738dc2 | 146 | LogF("- message: %d\r\n", message); |
andrewboyson | 6:819c17738dc2 | 147 | } |
andrewboyson | 8:5e66a6b4b38c | 148 | |
andrewboyson | 8:5e66a6b4b38c | 149 | //Take snapshot of the handshake hash up to this point |
andrewboyson | 8:5e66a6b4b38c | 150 | struct Sha256State handshakeSha; |
andrewboyson | 8:5e66a6b4b38c | 151 | Sha256Copy (&handshakeSha, &pConnection->handshakeSha); |
andrewboyson | 8:5e66a6b4b38c | 152 | Sha256Finish(&handshakeSha, pConnection->clientHandshakeHash); |
andrewboyson | 8:5e66a6b4b38c | 153 | |
andrewboyson | 8:5e66a6b4b38c | 154 | //Record that all incoming messages are now encrypted |
andrewboyson | 6:819c17738dc2 | 155 | pConnection->clientEncrypted = true; |
andrewboyson | 8:5e66a6b4b38c | 156 | pConnection->clientSequence = 0; |
andrewboyson | 6:819c17738dc2 | 157 | } |
andrewboyson | 4:6a1d887f1cad | 158 | static void handleAlert(int length, uint8_t* pBuffer) |
andrewboyson | 2:82268409e83f | 159 | { |
andrewboyson | 4:6a1d887f1cad | 160 | uint8_t level = pBuffer[0]; |
andrewboyson | 4:6a1d887f1cad | 161 | uint8_t description = pBuffer[1]; |
andrewboyson | 2:82268409e83f | 162 | if (TlsTrace) |
andrewboyson | 2:82268409e83f | 163 | { |
andrewboyson | 2:82268409e83f | 164 | Log("- alert level: "); TlsLogAlertLevel (level); Log("\r\n"); |
andrewboyson | 2:82268409e83f | 165 | Log("- alert description: "); TlsLogAlertDescription(description); Log("\r\n"); |
andrewboyson | 2:82268409e83f | 166 | } |
andrewboyson | 2:82268409e83f | 167 | } |
andrewboyson | 9:f354b4859b0b | 168 | static void handleApplication(int length, uint8_t* pBuffer, struct TlsConnection* pConnection) |
andrewboyson | 2:82268409e83f | 169 | { |
andrewboyson | 2:82268409e83f | 170 | if (TlsTrace) |
andrewboyson | 2:82268409e83f | 171 | { |
andrewboyson | 2:82268409e83f | 172 | Log("- application data:\r\n"); |
andrewboyson | 2:82268409e83f | 173 | LogBytesAsHex(pBuffer, length); |
andrewboyson | 2:82268409e83f | 174 | Log("\r\n"); |
andrewboyson | 9:f354b4859b0b | 175 | } |
andrewboyson | 10:e269fd7b9500 | 176 | HttpRequest(pConnection->id, length, (char*)pBuffer, 0); |
andrewboyson | 2:82268409e83f | 177 | } |
andrewboyson | 5:ee5489ee1117 | 178 | |
andrewboyson | 5:ee5489ee1117 | 179 | static void handleHandshake(int length, uint8_t* pBuffer, struct TlsConnection* pConnection) |
andrewboyson | 2:82268409e83f | 180 | { |
andrewboyson | 8:5e66a6b4b38c | 181 | Sha256Add(&pConnection->handshakeSha, pBuffer, length); |
andrewboyson | 7:94ef5824c3c0 | 182 | |
andrewboyson | 5:ee5489ee1117 | 183 | uint8_t* p = pBuffer; |
andrewboyson | 5:ee5489ee1117 | 184 | while (p < pBuffer + length) |
andrewboyson | 5:ee5489ee1117 | 185 | { |
andrewboyson | 5:ee5489ee1117 | 186 | uint8_t handshakeType = *p++; |
andrewboyson | 5:ee5489ee1117 | 187 | int handshakeLength = *p++ << 16; |
andrewboyson | 5:ee5489ee1117 | 188 | handshakeLength |= *p++ << 8; |
andrewboyson | 5:ee5489ee1117 | 189 | handshakeLength |= *p++ ; //Handshake length 3 bytes |
andrewboyson | 5:ee5489ee1117 | 190 | |
andrewboyson | 5:ee5489ee1117 | 191 | if (TlsTrace) |
andrewboyson | 5:ee5489ee1117 | 192 | { |
andrewboyson | 5:ee5489ee1117 | 193 | Log ("- handshake type: "); TlsLogHandshakeType(handshakeType); Log("\r\n"); |
andrewboyson | 5:ee5489ee1117 | 194 | LogF("- handshake length: %d\r\n", handshakeLength); |
andrewboyson | 5:ee5489ee1117 | 195 | } |
andrewboyson | 5:ee5489ee1117 | 196 | |
andrewboyson | 5:ee5489ee1117 | 197 | switch (handshakeType) |
andrewboyson | 5:ee5489ee1117 | 198 | { |
andrewboyson | 13:0a80b49a5e78 | 199 | case TLS_HANDSHAKE_CLIENT_HELLO: |
andrewboyson | 14:03a0b8fd6ddc | 200 | handleClientHello(handshakeLength, p, pConnection); |
andrewboyson | 5:ee5489ee1117 | 201 | break; |
andrewboyson | 5:ee5489ee1117 | 202 | |
andrewboyson | 13:0a80b49a5e78 | 203 | case TLS_HANDSHAKE_CLIENT_KEY_EXCHANGE: |
andrewboyson | 14:03a0b8fd6ddc | 204 | handleClientKeyExchange(handshakeLength, p, pConnection); |
andrewboyson | 5:ee5489ee1117 | 205 | break; |
andrewboyson | 5:ee5489ee1117 | 206 | |
andrewboyson | 13:0a80b49a5e78 | 207 | case TLS_HANDSHAKE_FINISHED: |
andrewboyson | 14:03a0b8fd6ddc | 208 | handleClientFinished(handshakeLength, p, pConnection); |
andrewboyson | 8:5e66a6b4b38c | 209 | break; |
andrewboyson | 8:5e66a6b4b38c | 210 | |
andrewboyson | 5:ee5489ee1117 | 211 | default: |
andrewboyson | 5:ee5489ee1117 | 212 | LogF("TLS - ignoring handshake type "); |
andrewboyson | 5:ee5489ee1117 | 213 | TlsLogHandshakeType(handshakeType); |
andrewboyson | 5:ee5489ee1117 | 214 | LogF(" and skipping %d bytes\r\n", handshakeLength); |
andrewboyson | 5:ee5489ee1117 | 215 | break; |
andrewboyson | 5:ee5489ee1117 | 216 | } |
andrewboyson | 5:ee5489ee1117 | 217 | p += handshakeLength; |
andrewboyson | 5:ee5489ee1117 | 218 | } |
andrewboyson | 5:ee5489ee1117 | 219 | } |
andrewboyson | 8:5e66a6b4b38c | 220 | static int handleContent(struct TlsConnection* pConnection, uint8_t* pBuffer, int available) |
andrewboyson | 8:5e66a6b4b38c | 221 | { |
andrewboyson | 5:ee5489ee1117 | 222 | uint8_t contentType = *pBuffer++; |
andrewboyson | 5:ee5489ee1117 | 223 | uint8_t versionH = *pBuffer++; |
andrewboyson | 5:ee5489ee1117 | 224 | uint8_t versionL = *pBuffer++; |
andrewboyson | 5:ee5489ee1117 | 225 | int length = *pBuffer++ << 8; |
andrewboyson | 5:ee5489ee1117 | 226 | length |= *pBuffer++; |
andrewboyson | 5:ee5489ee1117 | 227 | int overallLen = length + 5; |
andrewboyson | 5:ee5489ee1117 | 228 | |
andrewboyson | 2:82268409e83f | 229 | if (TlsTrace) |
andrewboyson | 2:82268409e83f | 230 | { |
andrewboyson | 2:82268409e83f | 231 | Log ("- content type: "); TlsLogContentType(contentType); Log("\r\n"); |
andrewboyson | 2:82268409e83f | 232 | LogF("- legacy HH:LL: %02x:%02x\r\n", versionH, versionL); |
andrewboyson | 2:82268409e83f | 233 | LogF("- length : %d\r\n" , length); |
andrewboyson | 2:82268409e83f | 234 | } |
andrewboyson | 8:5e66a6b4b38c | 235 | |
andrewboyson | 8:5e66a6b4b38c | 236 | if (contentType < 20 || contentType > 24) return overallLen; |
andrewboyson | 8:5e66a6b4b38c | 237 | if (versionH != 3 ) return overallLen; |
andrewboyson | 8:5e66a6b4b38c | 238 | if (overallLen > available ) return overallLen; |
andrewboyson | 13:0a80b49a5e78 | 239 | |
andrewboyson | 8:5e66a6b4b38c | 240 | if (pConnection->clientEncrypted) |
andrewboyson | 8:5e66a6b4b38c | 241 | { |
andrewboyson | 8:5e66a6b4b38c | 242 | //Decrypt the message |
andrewboyson | 18:e3cf22ba2a06 | 243 | TlsAes128CbcSha1Decrypt(&length, &pBuffer, pConnection, contentType); |
andrewboyson | 8:5e66a6b4b38c | 244 | } |
andrewboyson | 8:5e66a6b4b38c | 245 | |
andrewboyson | 2:82268409e83f | 246 | switch (contentType) |
andrewboyson | 2:82268409e83f | 247 | { |
andrewboyson | 13:0a80b49a5e78 | 248 | case TLS_CONTENT_TYPE_HANDSHAKE: |
andrewboyson | 8:5e66a6b4b38c | 249 | handleHandshake(length, pBuffer, pConnection); |
andrewboyson | 6:819c17738dc2 | 250 | break; |
andrewboyson | 6:819c17738dc2 | 251 | |
andrewboyson | 6:819c17738dc2 | 252 | case TLS_CONTENT_TYPE_CHANGE_CIPHER: |
andrewboyson | 6:819c17738dc2 | 253 | changeCipher(length, pBuffer, pConnection); |
andrewboyson | 5:ee5489ee1117 | 254 | break; |
andrewboyson | 5:ee5489ee1117 | 255 | |
andrewboyson | 5:ee5489ee1117 | 256 | case TLS_CONTENT_TYPE_ALERT: |
andrewboyson | 5:ee5489ee1117 | 257 | handleAlert(length, pBuffer); |
andrewboyson | 5:ee5489ee1117 | 258 | break; |
andrewboyson | 5:ee5489ee1117 | 259 | |
andrewboyson | 13:0a80b49a5e78 | 260 | case TLS_CONTENT_TYPE_APPLICATION: |
andrewboyson | 9:f354b4859b0b | 261 | handleApplication(length, pBuffer, pConnection); |
andrewboyson | 5:ee5489ee1117 | 262 | pConnection->toDo = DO_APPLICATION; |
andrewboyson | 5:ee5489ee1117 | 263 | break; |
andrewboyson | 5:ee5489ee1117 | 264 | |
andrewboyson | 5:ee5489ee1117 | 265 | default: |
andrewboyson | 5:ee5489ee1117 | 266 | Log("TLS - ignoring content type "); |
andrewboyson | 5:ee5489ee1117 | 267 | TlsLogContentType(contentType); |
andrewboyson | 5:ee5489ee1117 | 268 | LogF(" and skipping %d bytes\r\n", overallLen); |
andrewboyson | 5:ee5489ee1117 | 269 | pConnection->toDo = DO_WAIT_CLIENT_HELLO; |
andrewboyson | 5:ee5489ee1117 | 270 | break; |
andrewboyson | 5:ee5489ee1117 | 271 | } |
andrewboyson | 5:ee5489ee1117 | 272 | return overallLen; |
andrewboyson | 5:ee5489ee1117 | 273 | } |
andrewboyson | 5:ee5489ee1117 | 274 | void TlsRequest(int connectionId, int size, uint8_t* pRequestStream, uint32_t positionInRequestStream) |
andrewboyson | 6:819c17738dc2 | 275 | { |
andrewboyson | 5:ee5489ee1117 | 276 | //Log what we are doing |
andrewboyson | 6:819c17738dc2 | 277 | if (TlsTrace) LogF("TLS %d <<< %d (%u)\r\n", connectionId, size, positionInRequestStream); |
andrewboyson | 5:ee5489ee1117 | 278 | |
andrewboyson | 5:ee5489ee1117 | 279 | //Get new or existing connection information |
andrewboyson | 5:ee5489ee1117 | 280 | struct TlsConnection* pConnection; |
andrewboyson | 5:ee5489ee1117 | 281 | if (!positionInRequestStream) |
andrewboyson | 5:ee5489ee1117 | 282 | { |
andrewboyson | 8:5e66a6b4b38c | 283 | //If this is the start of the request then open a new connection (this starts handshakeSha) |
andrewboyson | 5:ee5489ee1117 | 284 | pConnection = TlsConnectionNew(connectionId); |
andrewboyson | 5:ee5489ee1117 | 285 | } |
andrewboyson | 5:ee5489ee1117 | 286 | else |
andrewboyson | 5:ee5489ee1117 | 287 | { |
andrewboyson | 5:ee5489ee1117 | 288 | //If this is in the middle of a request then open an existing connection |
andrewboyson | 5:ee5489ee1117 | 289 | pConnection = TlsConnectionOrNull(connectionId); |
andrewboyson | 5:ee5489ee1117 | 290 | if (!pConnection) |
andrewboyson | 2:82268409e83f | 291 | { |
andrewboyson | 5:ee5489ee1117 | 292 | LogTimeF("TlsRequest - no connection corresponds to id %d\r\n", connectionId); |
andrewboyson | 2:82268409e83f | 293 | return; |
andrewboyson | 2:82268409e83f | 294 | } |
andrewboyson | 5:ee5489ee1117 | 295 | } |
andrewboyson | 2:82268409e83f | 296 | |
andrewboyson | 5:ee5489ee1117 | 297 | //Handle each item of coalesced content |
andrewboyson | 5:ee5489ee1117 | 298 | uint8_t* pNext = pRequestStream; |
andrewboyson | 8:5e66a6b4b38c | 299 | uint8_t* pDeferred = pConnection->deferredContent; |
andrewboyson | 8:5e66a6b4b38c | 300 | while (pNext < pRequestStream + size) |
andrewboyson | 8:5e66a6b4b38c | 301 | { |
andrewboyson | 8:5e66a6b4b38c | 302 | if (pConnection->clientEncrypted && pConnection->toDo == DO_WAIT_DECRYPT_MASTER_SECRET) |
andrewboyson | 8:5e66a6b4b38c | 303 | { |
andrewboyson | 8:5e66a6b4b38c | 304 | if (pDeferred >= pConnection->deferredContent + TLS_DEFERRED_CONTENT_SIZE) break; |
andrewboyson | 8:5e66a6b4b38c | 305 | *pDeferred++ = *pNext++; //Defer handling the remaining content until have master secret |
andrewboyson | 8:5e66a6b4b38c | 306 | } |
andrewboyson | 8:5e66a6b4b38c | 307 | else |
andrewboyson | 8:5e66a6b4b38c | 308 | { |
andrewboyson | 8:5e66a6b4b38c | 309 | pNext += handleContent(pConnection, pNext, size + pRequestStream - pNext); |
andrewboyson | 8:5e66a6b4b38c | 310 | } |
andrewboyson | 8:5e66a6b4b38c | 311 | } |
andrewboyson | 8:5e66a6b4b38c | 312 | } |
andrewboyson | 8:5e66a6b4b38c | 313 | void TlsAsync() |
andrewboyson | 8:5e66a6b4b38c | 314 | { |
andrewboyson | 8:5e66a6b4b38c | 315 | struct TlsConnection* pConnection = TlsConnectionGetNext(); |
andrewboyson | 8:5e66a6b4b38c | 316 | |
andrewboyson | 8:5e66a6b4b38c | 317 | if (pConnection->toDo != DO_WAIT_DECRYPT_MASTER_SECRET) return; |
andrewboyson | 8:5e66a6b4b38c | 318 | |
andrewboyson | 10:e269fd7b9500 | 319 | struct TlsSession* pSession = TlsSessionOrNull(pConnection->sessionId); |
andrewboyson | 8:5e66a6b4b38c | 320 | if (!pSession) |
andrewboyson | 8:5e66a6b4b38c | 321 | { |
andrewboyson | 10:e269fd7b9500 | 322 | LogTimeF("TlsRequestAsync - invalid session %u\r\n", pConnection->sessionId); |
andrewboyson | 8:5e66a6b4b38c | 323 | return; |
andrewboyson | 8:5e66a6b4b38c | 324 | } |
andrewboyson | 8:5e66a6b4b38c | 325 | |
andrewboyson | 10:e269fd7b9500 | 326 | if (pSession->valid) return; |
andrewboyson | 8:5e66a6b4b38c | 327 | |
andrewboyson | 14:03a0b8fd6ddc | 328 | if (!PriKeyDecryptFinished(pConnection->slotPriKeyDecryption)) return; |
andrewboyson | 8:5e66a6b4b38c | 329 | |
andrewboyson | 17:93feb2a51d58 | 330 | uint8_t preMasterSecret[TLS_LENGTH_PRE_MASTER_SECRET]; |
andrewboyson | 17:93feb2a51d58 | 331 | PriKeyDecryptResultTail(pConnection->slotPriKeyDecryption, TLS_LENGTH_PRE_MASTER_SECRET, preMasterSecret); |
andrewboyson | 17:93feb2a51d58 | 332 | LogTime("Pre master secret\r\n"); LogBytesAsHex(preMasterSecret, TLS_LENGTH_PRE_MASTER_SECRET); Log("\r\n"); |
andrewboyson | 14:03a0b8fd6ddc | 333 | PriKeyDecryptClear(pConnection->slotPriKeyDecryption); |
andrewboyson | 8:5e66a6b4b38c | 334 | |
andrewboyson | 8:5e66a6b4b38c | 335 | TlsPrfMasterSecret(preMasterSecret, pConnection->clientRandom, pConnection->serverRandom, pSession->masterSecret); |
andrewboyson | 8:5e66a6b4b38c | 336 | |
andrewboyson | 19:f22327e8be7b | 337 | TlsPrfKeysAes128Sha1(pSession->masterSecret, pConnection->clientRandom, pConnection->serverRandom, pConnection->clientMacKey, |
andrewboyson | 19:f22327e8be7b | 338 | pConnection->serverMacKey, |
andrewboyson | 19:f22327e8be7b | 339 | pConnection->clientWriteKey, |
andrewboyson | 19:f22327e8be7b | 340 | pConnection->serverWriteKey); |
andrewboyson | 14:03a0b8fd6ddc | 341 | |
andrewboyson | 10:e269fd7b9500 | 342 | pSession->valid = true; |
andrewboyson | 8:5e66a6b4b38c | 343 | |
andrewboyson | 8:5e66a6b4b38c | 344 | LogTime("Sending deferred encrypted bytes\r\n"); LogBytesAsHex(pConnection->deferredContent, TLS_DEFERRED_CONTENT_SIZE); Log("\r\n"); |
andrewboyson | 8:5e66a6b4b38c | 345 | |
andrewboyson | 8:5e66a6b4b38c | 346 | handleContent(pConnection, pConnection->deferredContent, TLS_DEFERRED_CONTENT_SIZE); |
andrewboyson | 2:82268409e83f | 347 | } |
andrewboyson | 5:ee5489ee1117 | 348 | void TlsReset(int connectionId) |
andrewboyson | 5:ee5489ee1117 | 349 | { |
andrewboyson | 5:ee5489ee1117 | 350 | TlsConnectionReset(connectionId); |
andrewboyson | 10:e269fd7b9500 | 351 | HttpReset(connectionId); |
andrewboyson | 5:ee5489ee1117 | 352 | } |