+/* Four test cases for custom extensions:
+ * 0 - no ClientHello extension or ServerHello response
+ * 1 - ClientHello with "abc", no response
+ * 2 - ClientHello with "abc", empty response
+ * 3 - ClientHello with "abc", "defg" response
+ */
+
+static int custom_ext_0_cli_first_cb(SSL *s, unsigned short ext_type,
+ const unsigned char **out,
+ unsigned short *outlen, void *arg)
+ {
+ if (ext_type != CUSTOM_EXT_TYPE_0)
+ custom_ext_error = 1;
+ return -1; /* Don't send an extension */
+ }
+
+static int custom_ext_0_cli_second_cb(SSL *s, unsigned short ext_type,
+ const unsigned char *in,
+ unsigned short inlen, int *al,
+ void *arg)
+ {
+ custom_ext_error = 1; /* Shouldn't be called */
+ return 0;
+ }
+
+static int custom_ext_1_cli_first_cb(SSL *s, unsigned short ext_type,
+ const unsigned char **out,
+ unsigned short *outlen, void *arg)
+ {
+ if (ext_type != CUSTOM_EXT_TYPE_1)
+ custom_ext_error = 1;
+ *out = (const unsigned char*)custom_ext_cli_string;
+ *outlen = strlen(custom_ext_cli_string);
+ return 1; /* Send "abc" */
+ }
+
+static int custom_ext_1_cli_second_cb(SSL *s, unsigned short ext_type,
+ const unsigned char *in,
+ unsigned short inlen, int *al,
+ void *arg)
+ {
+ custom_ext_error = 1; /* Shouldn't be called */
+ return 0;
+ }
+
+static int custom_ext_2_cli_first_cb(SSL *s, unsigned short ext_type,
+ const unsigned char **out,
+ unsigned short *outlen, void *arg)
+ {
+ if (ext_type != CUSTOM_EXT_TYPE_2)
+ custom_ext_error = 1;
+ *out = (const unsigned char*)custom_ext_cli_string;
+ *outlen = strlen(custom_ext_cli_string);
+ return 1; /* Send "abc" */
+ }
+
+static int custom_ext_2_cli_second_cb(SSL *s, unsigned short ext_type,
+ const unsigned char *in,
+ unsigned short inlen, int *al,
+ void *arg)
+ {
+ if (ext_type != CUSTOM_EXT_TYPE_2)
+ custom_ext_error = 1;
+ if (inlen != 0)
+ custom_ext_error = 1; /* Should be empty response */
+ return 1;
+ }
+
+static int custom_ext_3_cli_first_cb(SSL *s, unsigned short ext_type,
+ const unsigned char **out,
+ unsigned short *outlen, void *arg)
+ {
+ if (ext_type != CUSTOM_EXT_TYPE_3)
+ custom_ext_error = 1;
+ *out = (const unsigned char*)custom_ext_cli_string;
+ *outlen = strlen(custom_ext_cli_string);
+ return 1; /* Send "abc" */
+ }
+
+static int custom_ext_3_cli_second_cb(SSL *s, unsigned short ext_type,
+ const unsigned char *in,
+ unsigned short inlen, int *al,
+ void *arg)
+ {
+ if (ext_type != CUSTOM_EXT_TYPE_3)
+ custom_ext_error = 1;
+ if (inlen != strlen(custom_ext_srv_string))
+ custom_ext_error = 1;
+ if (memcmp(custom_ext_srv_string, in, inlen) != 0)
+ custom_ext_error = 1; /* Check for "defg" */
+ return 1;
+ }
+
+
+static int custom_ext_0_srv_first_cb(SSL *s, unsigned short ext_type,
+ const unsigned char *in,
+ unsigned short inlen, int *al,
+ void *arg)
+ {
+ custom_ext_error = 1;
+ return 0; /* Shouldn't be called */
+ }
+
+static int custom_ext_0_srv_second_cb(SSL *s, unsigned short ext_type,
+ const unsigned char **out,
+ unsigned short *outlen, void *arg)
+ {
+ custom_ext_error = 1;
+ return 0; /* Shouldn't be called */
+ }
+
+static int custom_ext_1_srv_first_cb(SSL *s, unsigned short ext_type,
+ const unsigned char *in,
+ unsigned short inlen, int *al,
+ void *arg)
+ {
+ if (ext_type != CUSTOM_EXT_TYPE_1)
+ custom_ext_error = 1;
+ /* Check for "abc" */
+ if (inlen != strlen(custom_ext_cli_string))
+ custom_ext_error = 1;
+ if (memcmp(in, custom_ext_cli_string, inlen) != 0)
+ custom_ext_error = 1;
+ return 1;
+ }
+
+static int custom_ext_1_srv_second_cb(SSL *s, unsigned short ext_type,
+ const unsigned char **out,
+ unsigned short *outlen, void *arg)
+ {
+ return -1; /* Don't send an extension */
+ }
+
+static int custom_ext_2_srv_first_cb(SSL *s, unsigned short ext_type,
+ const unsigned char *in,
+ unsigned short inlen, int *al,
+ void *arg)
+ {
+ if (ext_type != CUSTOM_EXT_TYPE_2)
+ custom_ext_error = 1;
+ /* Check for "abc" */
+ if (inlen != strlen(custom_ext_cli_string))
+ custom_ext_error = 1;
+ if (memcmp(in, custom_ext_cli_string, inlen) != 0)
+ custom_ext_error = 1;
+ return 1;
+ }
+
+static int custom_ext_2_srv_second_cb(SSL *s, unsigned short ext_type,
+ const unsigned char **out,
+ unsigned short *outlen, void *arg)
+ {
+ *out = NULL;
+ *outlen = 0;
+ return 1; /* Send empty extension */
+ }
+
+static int custom_ext_3_srv_first_cb(SSL *s, unsigned short ext_type,
+ const unsigned char *in,
+ unsigned short inlen, int *al,
+ void *arg)
+ {
+ if (ext_type != CUSTOM_EXT_TYPE_3)
+ custom_ext_error = 1;
+ /* Check for "abc" */
+ if (inlen != strlen(custom_ext_cli_string))
+ custom_ext_error = 1;
+ if (memcmp(in, custom_ext_cli_string, inlen) != 0)
+ custom_ext_error = 1;
+ return 1;
+ }
+
+static int custom_ext_3_srv_second_cb(SSL *s, unsigned short ext_type,
+ const unsigned char **out,
+ unsigned short *outlen, void *arg)
+ {
+ *out = (const unsigned char*)custom_ext_srv_string;
+ *outlen = strlen(custom_ext_srv_string);
+ return 1; /* Send "defg" */
+ }
+
+