mbedtls: add support for pkcs7
PKCS7 signing format is used by OpenPOWER Key Management, which is
using mbedtls as its crypto library.
This patch adds the limited support of pkcs7 parser and verification
to the mbedtls. The limitations are:
* Only signed data is supported.
* CRLs are not currently handled.
* Single signer is supported.
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Eric Richter <erichte@linux.ibm.com>
Signed-off-by: Nayna Jain <nayna@linux.ibm.com>
diff --git a/include/mbedtls/asn1.h b/include/mbedtls/asn1.h
index be2cae7..21ade1b 100644
--- a/include/mbedtls/asn1.h
+++ b/include/mbedtls/asn1.h
@@ -38,8 +38,9 @@
/**
* \name ASN1 Error codes
- * These error codes are OR'ed to X509 error codes for
+ * These error codes are combined with other error codes for
* higher error granularity.
+ * e.g. X.509 and PKCS #7 error codes
* ASN1 is a standard to specify data structures.
* \{
*/