Add TLS 1.3 early data examples #530
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Introduces client and server examples that demonstrate the use of TLS 1.3 early data (0-RTT) with session resumption. The client example performs an initial handshake to obtain a session ticket, then reconnects and sends early data. The server example receives early data and sends back a reply.
rizlik
requested changes
Nov 6, 2025
tls/client-tls13-earlydata.c
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| /* Check if ticket was received */ | ||
| if (!wolfSSL_SessionIsSetup(wolfSSL_SSL_get0_session(ssl))) { | ||
| /* Attempt to read a session ticket from server */ | ||
| (void)wolfSSL_read(ssl, recvBuf, sizeof(recvBuf)-1); |
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For null termination
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if we receive data here then data is never use, probably it's better to to check and print
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This is outdated. Its using wolfSSL_peek now.
rizlik
requested changes
Nov 7, 2025
tls/client-tls13-earlydata.c
Outdated
| /* Check if ticket was received */ | ||
| if (!wolfSSL_SessionIsSetup(wolfSSL_SSL_get0_session(ssl))) { | ||
| /* Attempt to read a session ticket from server */ | ||
| (void)wolfSSL_read(ssl, recvBuf, sizeof(recvBuf)-1); |
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if we receive data here then data is never use, probably it's better to to check and print
rizlik
requested changes
Nov 21, 2025
dtls/client-dtls13-earlydata.c
Outdated
| } | ||
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| /* === 1st connection: perform handshake and get session ticket === */ | ||
| sockfd = udp_connect(server_ip, DEFAULT_PORT, &servAddr); |
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can you rename in udp_create_socket?
dtls/client-dtls13-earlydata.c
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| sockfd = -1; | ||
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| /* === 2nd connection: resume session and send early data === */ | ||
| sockfd = udp_connect(server_ip, DEFAULT_PORT, &servAddr); |
During the resumed (second) DTLS connection, read any server data that arrives during the handshake and print it. This adds a memset and wolfSSL_read into recvBuf and prints when len > 0.
rizlik
requested changes
Dec 9, 2025
| printf("Server sent during handshake: %s\n", recvBuf); | ||
| } | ||
| } | ||
| } |
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Here is cleaner to keep calling wolfSSL_connect after reading server 1-RTT data
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Introduces client and server examples that demonstrate the use of
TLS 1.3 early data (0-RTT) with session resumption.
The client example performs an initial handshake to obtain a session
ticket, then reconnects and sends early data. The server example
receives early data and sends back a reply.
DTLS 1.3 examples depend on wolfSSL/wolfssl#9367