Don't try to write empty early data in the tool.
We'll return 0 and get confused. (Negotiating early data and not using
it is plausible if, say, the client preconnects but gets a ServerHello
before any request binds the socket.)
Change-Id: I94d458e18c58223f73c9340cac06e5ec5f8c84a0
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/47684
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/tool/client.cc b/tool/client.cc
index 31378d6..a36d7ea 100644
--- a/tool/client.cc
+++ b/tool/client.cc
@@ -313,15 +313,17 @@
}
early_data = std::string(data.begin(), data.end());
}
- int ed_size = early_data.size();
- int ssl_ret = SSL_write(ssl.get(), early_data.data(), ed_size);
- if (ssl_ret <= 0) {
- int ssl_err = SSL_get_error(ssl.get(), ssl_ret);
- PrintSSLError(stderr, "Error while writing", ssl_err, ssl_ret);
- return false;
- } else if (ssl_ret != ed_size) {
- fprintf(stderr, "Short write from SSL_write.\n");
- return false;
+ if (!early_data.empty()) {
+ int ed_size = early_data.size();
+ int ssl_ret = SSL_write(ssl.get(), early_data.data(), ed_size);
+ if (ssl_ret <= 0) {
+ int ssl_err = SSL_get_error(ssl.get(), ssl_ret);
+ PrintSSLError(stderr, "Error while writing", ssl_err, ssl_ret);
+ return false;
+ } else if (ssl_ret != ed_size) {
+ fprintf(stderr, "Short write from SSL_write.\n");
+ return false;
+ }
}
}