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-rw-r--r--lib/krb5.c34
1 files changed, 19 insertions, 15 deletions
diff --git a/lib/krb5.c b/lib/krb5.c
index 842bda17b..2530395d1 100644
--- a/lib/krb5.c
+++ b/lib/krb5.c
@@ -178,7 +178,7 @@ krb5_auth(void *app_data, struct connectdata *conn)
struct SessionHandle *data = conn->data;
CURLcode result;
const char *service = "ftp", *srv_host = "host";
- gss_buffer_desc gssbuf, _gssresp, *gssresp;
+ gss_buffer_desc input_buffer, output_buffer, _gssresp, *gssresp;
OM_uint32 maj, min;
gss_name_t gssname;
gss_ctx_id_t *context = app_data;
@@ -214,28 +214,31 @@ krb5_auth(void *app_data, struct connectdata *conn)
return -1;
}
- gssbuf.value = data->state.buffer;
- gssbuf.length = snprintf(gssbuf.value, BUFSIZE, "%s@%s", service, host);
- maj = gss_import_name(&min, &gssbuf, GSS_C_NT_HOSTBASED_SERVICE, &gssname);
+ input_buffer.value = data->state.buffer;
+ input_buffer.length = snprintf(input_buffer.value, BUFSIZE, "%s@%s",
+ service, host);
+ maj = gss_import_name(&min, &input_buffer, GSS_C_NT_HOSTBASED_SERVICE,
+ &gssname);
if(maj != GSS_S_COMPLETE) {
gss_release_name(&min, &gssname);
if(service == srv_host) {
- Curl_failf(data, "Error importing service name %s", gssbuf.value);
+ Curl_failf(data, "Error importing service name %s", input_buffer.value);
return AUTH_ERROR;
}
service = srv_host;
continue;
}
- {
- /* We pass NULL as |output_name_type| to avoid a leak. */
- gss_display_name(&min, gssname, &gssbuf, NULL);
- Curl_infof(data, "Trying against %s\n", gssbuf.value);
- gss_release_buffer(&min, &gssbuf);
- }
+ /* We pass NULL as |output_name_type| to avoid a leak. */
+ gss_display_name(&min, gssname, &output_buffer, NULL);
+ Curl_infof(data, "Trying against %s\n", output_buffer.value);
gssresp = GSS_C_NO_BUFFER;
*context = GSS_C_NO_CONTEXT;
do {
+ /* Release the buffer at each iteration to avoid leaking: the first time
+ we are releasing the memory from gss_display_name. The last item is
+ taken care by a final gss_release_buffer. */
+ gss_release_buffer(&min, &output_buffer);
ret = AUTH_OK;
maj = gss_init_sec_context(&min,
GSS_C_NO_CREDENTIAL,
@@ -247,7 +250,7 @@ krb5_auth(void *app_data, struct connectdata *conn)
&chan,
gssresp,
NULL,
- &gssbuf,
+ &output_buffer,
NULL,
NULL);
@@ -262,9 +265,9 @@ krb5_auth(void *app_data, struct connectdata *conn)
break;
}
- if(gssbuf.length != 0) {
- if(Curl_base64_encode(data, (char *)gssbuf.value, gssbuf.length, &p)
- < 1) {
+ if(output_buffer.length != 0) {
+ if(Curl_base64_encode(data, (char *)output_buffer.value,
+ output_buffer.length, &p) < 1) {
Curl_infof(data, "Out of memory base64-encoding");
ret = AUTH_CONTINUE;
break;
@@ -307,6 +310,7 @@ krb5_auth(void *app_data, struct connectdata *conn)
} while(maj == GSS_S_CONTINUE_NEEDED);
gss_release_name(&min, &gssname);
+ gss_release_buffer(&min, &output_buffer);
if(gssresp)
free(_gssresp.value);