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Wed, 11 Mar 2020 13:52:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1583934753; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=a6t3X74nlBAIN+SErRk0soe+wHgMWzGzq3342XWA9qk=; b=MEJB43366p1KXM6uFISdBzqoHY7rehQudka9A0BditQsdWeJTxua+0FQuzNMtNVQkACEWc WcmiCcmuPeHOaD9o9fpOHzCifsiSN1pUQunhGaS/F2Y4jISOk1q8/xDNgyjMkayH4fDuEG FCuSeZRLPHY2K7Ov9WSOSrtaJG0wZ6w= X-MC-Unique: yCqzhhXQN4CdysaCqDxJUQ-1 From: Max Reitz To: qemu-block@nongnu.org Subject: [PULL 05/19] block/curl: HTTP header fields allow whitespace around values Date: Wed, 11 Mar 2020 14:51:59 +0100 Message-Id: <20200311135213.1242028-6-mreitz@redhat.com> In-Reply-To: <20200311135213.1242028-1-mreitz@redhat.com> References: <20200311135213.1242028-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 207.211.31.120 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Peter Maydell , qemu-devel@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" From: David Edmondson 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 Message-Id: <20200224101310.101169-2-david.edmondson@oracle.com> Reviewed-by: Max Reitz Signed-off-by: Max Reitz --- block/curl.c | 31 +++++++++++++++++++++++++++---- 1 file changed, 27 insertions(+), 4 deletions(-) diff --git a/block/curl.c b/block/curl.c index f86299378e..f9ffb7f4e2 100644 --- a/block/curl.c +++ b/block/curl.c @@ -214,11 +214,34 @@ static size_t curl_header_cb(void *ptr, size_t size, = size_t nmemb, void *opaque) { BDRVCURLState *s =3D opaque; size_t realsize =3D size * nmemb; - const char *accept_line =3D "Accept-Ranges: bytes"; + const char *header =3D (char *)ptr; + const char *end =3D header + realsize; + const char *accept_ranges =3D "Accept-Ranges:"; + const char *bytes =3D "bytes"; =20 - if (realsize >=3D strlen(accept_line) - && strncmp((char *)ptr, accept_line, strlen(accept_line)) =3D=3D 0= ) { - s->accept_range =3D true; + if (realsize >=3D strlen(accept_ranges) + && strncmp(header, accept_ranges, strlen(accept_ranges)) =3D=3D 0)= { + + char *p =3D strchr(header, ':') + 1; + + /* Skip whitespace between the header name and value. */ + while (p < end && *p && g_ascii_isspace(*p)) { + p++; + } + + if (end - p >=3D strlen(bytes) + && strncmp(p, bytes, strlen(bytes)) =3D=3D 0) { + + /* Check that there is nothing but whitespace after the value.= */ + p +=3D strlen(bytes); + while (p < end && *p && g_ascii_isspace(*p)) { + p++; + } + + if (p =3D=3D end || !*p) { + s->accept_range =3D true; + } + } } =20 return realsize; --=20 2.24.1