diff options
| -rw-r--r-- | ext/openssl/ossl_ssl.c | 8 | ||||
| -rw-r--r-- | test/test_pair.rb | 11 |
2 files changed, 18 insertions, 1 deletions
diff --git a/ext/openssl/ossl_ssl.c b/ext/openssl/ossl_ssl.c index 4c0f82b3..a443c055 100644 --- a/ext/openssl/ossl_ssl.c +++ b/ext/openssl/ossl_ssl.c @@ -1776,7 +1776,13 @@ ossl_ssl_write_internal(VALUE self, VALUE str, VALUE opts) if (ssl_started(ssl)) { for (;;){ - nwrite = SSL_write(ssl, RSTRING_PTR(str), RSTRING_LENINT(str)); + int num = RSTRING_LENINT(str); + + /* SSL_write(3ssl) manpage states num == 0 is undefined */ + if (num == 0) + goto end; + + nwrite = SSL_write(ssl, RSTRING_PTR(str), num); switch(ssl_get_error(ssl, nwrite)){ case SSL_ERROR_NONE: goto end; diff --git a/test/test_pair.rb b/test/test_pair.rb index ee43a0c6..610aa982 100644 --- a/test/test_pair.rb +++ b/test/test_pair.rb @@ -311,6 +311,17 @@ module OpenSSL::TestPairM } end + def test_write_zero + ssl_pair {|s1, s2| + assert_equal 0, s2.write_nonblock('', exception: false) + assert_kind_of Symbol, s1.read_nonblock(1, exception: false) + assert_equal 0, s2.syswrite('') + assert_kind_of Symbol, s1.read_nonblock(1, exception: false) + assert_equal 0, s2.write('') + assert_kind_of Symbol, s1.read_nonblock(1, exception: false) + } + end + def tcp_pair host = "127.0.0.1" serv = TCPServer.new(host, 0) |