[Qemu-devel] [PATCH 2/3] curl: Add sslverify option

[Matthew Booth]

This allows qemu to use images over https with a self-signed certificate. It
defaults to verifying the certificate.

Signed-off-by: Matthew Booth <address@hidden>
---
 block/curl.c | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/block/curl.c b/block/curl.c
index 4de6856..e427e52 100644
--- a/block/curl.c
+++ b/block/curl.c
@@ -23,6 +23,7 @@
  */
 #include "qemu-common.h"
 #include "block/block_int.h"
+#include "qapi/qmp/qbool.h"
 #include <curl/curl.h>
 
 // #define DEBUG
@@ -54,6 +55,7 @@
 
 #define CURL_BLOCK_OPT_URL       "url"
 #define CURL_BLOCK_OPT_READAHEAD "readahead"
+#define CURL_BLOCK_OPT_SSLVERIFY "sslverify"
 
 struct BDRVCURLState;
 
@@ -91,6 +93,7 @@ typedef struct BDRVCURLState {
     CURLState states[CURL_NUM_STATES];
     char *url;
     size_t readahead_size;
+    bool sslverify;
     bool accept_range;
 } BDRVCURLState;
 
@@ -357,6 +360,7 @@ static CURLState *curl_init_state(BDRVCURLState *s)
             return NULL;
         }
         curl_easy_setopt(state->curl, CURLOPT_URL, s->url);
+        curl_easy_setopt(state->curl, CURLOPT_SSL_VERIFYPEER, s->sslverify);
         curl_easy_setopt(state->curl, CURLOPT_TIMEOUT, 5);
         curl_easy_setopt(state->curl, CURLOPT_WRITEFUNCTION,
                          (void *)curl_read_cb);
@@ -440,6 +444,27 @@ static void curl_parse_filename(const char *filename, 
QDict *options,
                 *end = '\0';
                 qdict_put(options, CURL_BLOCK_OPT_READAHEAD,
                           qstring_from_str(value));
+            } else if (opt_len == strlen(CURL_BLOCK_OPT_SSLVERIFY) &&
+                       memcmp(opt_start, CURL_BLOCK_OPT_SSLVERIFY,
+                       opt_len) == 0) {
+                /* This is redundant after the first iteration */
+                *end = '\0';
+
+                int sslverify;
+                if (value_len == strlen("on") &&
+                    memcmp(value, "on", value_len) == 0) {
+                    sslverify = 1;
+                } else if (value_len == strlen("off") &&
+                         memcmp(value, "off", value_len) == 0) {
+                    sslverify = 0;
+                } else {
+                    error_set(errp, QERR_INVALID_PARAMETER_VALUE,
+                              CURL_BLOCK_OPT_SSLVERIFY, "'on' or 'off'");
+                    goto out;
+                }
+
+                qdict_put(options, CURL_BLOCK_OPT_SSLVERIFY,
+                          qbool_from_int(sslverify));
             } else {
                 /* Unknown option */
                 break;
@@ -454,6 +479,7 @@ static void curl_parse_filename(const char *filename, QDict 
*options,
 
     qdict_put(options, CURL_BLOCK_OPT_URL, qstring_from_str(file));
 
+out:
     g_free(file);
 }
 
@@ -471,6 +497,11 @@ static QemuOptsList runtime_opts = {
             .type = QEMU_OPT_SIZE,
             .help = "Readahead size",
         },
+        {
+            .name = CURL_BLOCK_OPT_SSLVERIFY,
+            .type = QEMU_OPT_BOOL,
+            .help = "Verify SSL certificate"
+        },
         { /* end of list */ }
     },
 };
@@ -507,6 +538,8 @@ static int curl_open(BlockDriverState *bs, QDict *options, 
int flags,
         goto out_noclean;
     }
 
+    s->sslverify = qemu_opt_get_bool(opts, CURL_BLOCK_OPT_SSLVERIFY, true);
+
     file = qemu_opt_get(opts, CURL_BLOCK_OPT_URL);
     if (file == NULL) {
         error_setg(errp, "curl block driver requires an 'url' option");
-- 
1.9.0