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Catch and display SSL errors for fatal alerts (#7681)

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Partial fix to #7678
This commit is contained in:
Earle F. Philhower, III 2020-10-27 22:18:26 -07:00 committed by GitHub
parent eb7e082a3c
commit cfdcff1028
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 13 additions and 2 deletions
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15
libraries/ESP8266WiFi/src/WiFiClientSecureBearSSL.cpp
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@ -1254,11 +1254,22 @@ bool WiFiClientSecure::_connectSSLServerEC(const X509List *chain,
int WiFiClientSecure::getLastSSLError(char *dest, size_t len) {
int err = 0;
const char *t = PSTR("OK");
const char *recv_fatal = "";
const char *send_fatal = "";
if (_sc || _sc_svr) {
err = br_ssl_engine_last_error(_eng);
}
if (_oom_err) {
err = -1000;
} else {
if (err & BR_ERR_RECV_FATAL_ALERT) {
recv_fatal = PSTR("SSL received fatal alert - ");
err &= ~BR_ERR_RECV_FATAL_ALERT;
}
if (err & BR_ERR_SEND_FATAL_ALERT) {
send_fatal = PSTR("SSL sent fatal alert - ");
err &= ~BR_ERR_SEND_FATAL_ALERT;
}
}
switch (err) {
case -1000: t = PSTR("Unable to allocate memory for SSL structures and buffers."); break;
@ -1323,8 +1334,8 @@ int WiFiClientSecure::getLastSSLError(char *dest, size_t len) {
default: t = PSTR("Unknown error code."); break;
}
if (dest) {
strncpy_P(dest, t, len);
dest[len - 1] = 0;
// snprintf is PSTR safe and guaranteed to 0-terminate
snprintf(dest, len, "%s%s%s", recv_fatal, send_fatal, t);
}
return err;
}