linux-kernel - [PATCH 5/9] pefile: Parse the presumed PKCS#7 content of the certificate blob

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Date:	Thu,  3 Jul 2014 17:07:17 -0400
From:	Vivek Goyal <vgoyal@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	ebiederm@...ssion.com, hpa@...or.com, mjg59@...f.ucam.org,
	greg@...ah.com, bp@...en8.de, dyoung@...hat.com,
	chaowang@...hat.com, bhe@...hat.com, akpm@...ux-foundation.org,
	dhowells@...hat.com, pjones@...hat.com,
	Vivek Goyal <vgoyal@...hat.com>
Subject: [PATCH 5/9] pefile: Parse the presumed PKCS#7 content of the certificate blob

Parse the content of the certificate blob, presuming it to be PKCS#7 format.

Signed-off-by: David Howells <dhowells@...hat.com>
Signed-off-by: Vivek Goyal <vgoyal@...hat.com>
---
 arch/x86/kernel/pefile_parser.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/pefile_parser.c b/arch/x86/kernel/pefile_parser.c
index 088779e..e4d3410 100644
--- a/arch/x86/kernel/pefile_parser.c
+++ b/arch/x86/kernel/pefile_parser.c
@@ -199,6 +199,7 @@ static int pefile_parse_binary(const void *pebuf, unsigned int pelen,
  */
 int pefile_parse_verify_sig(const void *pebuf, unsigned int pelen)
 {
+	void *pkcs7;
 	struct pefile_context ctx;
 	int ret;
 
@@ -213,6 +214,15 @@ int pefile_parse_verify_sig(const void *pebuf, unsigned int pelen)
 	if (ret < 0)
 		return ret;
 
+	pkcs7 = pkcs7_parse_message(pebuf + ctx.sig_offset, ctx.sig_len);
+	if (IS_ERR(pkcs7))
+		return PTR_ERR(pkcs7);
+	ctx.pkcs7 = pkcs7;
+
 	/* Not yet complete */
-	return -ENOANO;
+	ret = -ENOANO;
+
+error:
+	pkcs7_free_message(ctx.pkcs7);
+	return ret;
 }
-- 
1.9.0

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