Mercurial > hg > nginx
changeset 7965:f2bbbc0ccdfb stable-1.20
SSL: use of the SSL_OP_IGNORE_UNEXPECTED_EOF option.
A new behaviour was introduced in OpenSSL 1.1.1e, when a peer does not send
close_notify before closing the connection. Previously, it was to return
SSL_ERROR_SYSCALL with errno 0, known since at least OpenSSL 0.9.7, and is
handled gracefully in nginx. Now it returns SSL_ERROR_SSL with a distinct
reason SSL_R_UNEXPECTED_EOF_WHILE_READING ("unexpected eof while reading").
This leads to critical errors seen in nginx within various routines such as
SSL_do_handshake(), SSL_read(), SSL_shutdown(). The behaviour was restored
in OpenSSL 1.1.1f, but presents in OpenSSL 3.0 by default.
Use of the SSL_OP_IGNORE_UNEXPECTED_EOF option added in OpenSSL 3.0 allows
to set a compatible behaviour to return SSL_ERROR_ZERO_RETURN:
https://git.openssl.org/?p=openssl.git;a=commitdiff;h=09b90e0
See for additional details: https://github.com/openssl/openssl/issues/11381
| author | Sergey Kandaurov <pluknet@nginx.com> |
|---|---|
| date | Tue, 10 Aug 2021 23:43:17 +0300 |
| parents | 7b79f0944197 |
| children | 5d09596909c6 |
| files | src/event/ngx_event_openssl.c |
| diffstat | 1 files changed, 4 insertions(+), 0 deletions(-) [+] |
line wrap: on
line diff
--- a/src/event/ngx_event_openssl.c +++ b/src/event/ngx_event_openssl.c @@ -378,6 +378,10 @@ ngx_ssl_create(ngx_ssl_t *ssl, ngx_uint_ SSL_CTX_set_options(ssl->ctx, SSL_OP_NO_CLIENT_RENEGOTIATION); #endif +#ifdef SSL_OP_IGNORE_UNEXPECTED_EOF + SSL_CTX_set_options(ssl->ctx, SSL_OP_IGNORE_UNEXPECTED_EOF); +#endif + #ifdef SSL_MODE_RELEASE_BUFFERS SSL_CTX_set_mode(ssl->ctx, SSL_MODE_RELEASE_BUFFERS); #endif