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block/curl: HTTP header fields allow whitespace around values

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RH-Author: Richard Jones <rjones@redhat.com>
Message-id: <20200528142737.17318-2-rjones@redhat.com>
Patchwork-id: 96894
O-Subject: [RHEL-AV-8.2.1 qemu-kvm PATCH 1/2] block/curl: HTTP header fields allow whitespace around values
Bugzilla: 1841038
RH-Acked-by: Eric Blake <eblake@redhat.com>
RH-Acked-by: Max Reitz <mreitz@redhat.com>
RH-Acked-by: Danilo de Paula <ddepaula@redhat.com>

From: David Edmondson <david.edmondson@oracle.com>

RFC 7230 section 3.2 indicates that whitespace is permitted between
the field name and field value and after the field value.

Signed-off-by: David Edmondson <david.edmondson@oracle.com>
Message-Id: <20200224101310.101169-2-david.edmondson@oracle.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
(cherry picked from commit 7788a319399f17476ff1dd43164c869e320820a2)
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
This commit is contained in:
Chen Qun 2020-05-28 14:27:36 +01:00
parent 7cdb42a8eb
commit a3094362d2
1 changed files with 75 additions and 0 deletions
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75
block-curl-HTTP-header-fields-allow-whitespace-aroun.patch Normal file
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@ -0,0 +1,75 @@
From c8fd37c06fd24d1242629dda329dd16bea20f319 Mon Sep 17 00:00:00 2001
From: Richard Jones <rjones@redhat.com>
Date: Thu, 28 May 2020 14:27:36 +0100
Subject: [PATCH] block/curl: HTTP header fields allow whitespace around values
RH-Author: Richard Jones <rjones@redhat.com>
Message-id: <20200528142737.17318-2-rjones@redhat.com>
Patchwork-id: 96894
O-Subject: [RHEL-AV-8.2.1 qemu-kvm PATCH 1/2] block/curl: HTTP header fields allow whitespace around values
Bugzilla: 1841038
RH-Acked-by: Eric Blake <eblake@redhat.com>
RH-Acked-by: Max Reitz <mreitz@redhat.com>
RH-Acked-by: Danilo de Paula <ddepaula@redhat.com>
From: David Edmondson <david.edmondson@oracle.com>
RFC 7230 section 3.2 indicates that whitespace is permitted between
the field name and field value and after the field value.
Signed-off-by: David Edmondson <david.edmondson@oracle.com>
Message-Id: <20200224101310.101169-2-david.edmondson@oracle.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
(cherry picked from commit 7788a319399f17476ff1dd43164c869e320820a2)
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
block/curl.c | 31 +++++++++++++++++++++++++++----
1 file changed, 27 insertions(+), 4 deletions(-)
diff --git a/block/curl.c b/block/curl.c
index d4c8e94f3e..bfabe7eabd 100644
--- a/block/curl.c
+++ b/block/curl.c
@@ -212,11 +212,34 @@ static size_t curl_header_cb(void *ptr, size_t size, size_t nmemb, void *opaque)
{
BDRVCURLState *s = opaque;
size_t realsize = size * nmemb;
- const char *accept_line = "Accept-Ranges: bytes";
+ const char *header = (char *)ptr;
+ const char *end = header + realsize;
+ const char *accept_ranges = "Accept-Ranges:";
+ const char *bytes = "bytes";
- if (realsize >= strlen(accept_line)
- && strncmp((char *)ptr, accept_line, strlen(accept_line)) == 0) {
- s->accept_range = true;
+ if (realsize >= strlen(accept_ranges)
+ && strncmp(header, accept_ranges, strlen(accept_ranges)) == 0) {
+
+ char *p = strchr(header, ':') + 1;
+
+ /* Skip whitespace between the header name and value. */
+ while (p < end && *p && g_ascii_isspace(*p)) {
+ p++;
+ }
+
+ if (end - p >= strlen(bytes)
+ && strncmp(p, bytes, strlen(bytes)) == 0) {
+
+ /* Check that there is nothing but whitespace after the value. */
+ p += strlen(bytes);
+ while (p < end && *p && g_ascii_isspace(*p)) {
+ p++;
+ }
+
+ if (p == end || !*p) {
+ s->accept_range = true;
+ }
+ }
}
return realsize;
--
2.27.0