lib: crypto: add pkcs7 message parser
Imported from linux kernel v5.3:
pkcs7.asn1 without changes
pkcs7.h with changes marked as __UBOOT__
pkcs7_parser.h without changes
pkcs7_parser.c with changes marked as __UBOOT__
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
diff --git a/lib/crypto/pkcs7_parser.h b/lib/crypto/pkcs7_parser.h
new file mode 100644
index 0000000..6565fdc
--- /dev/null
+++ b/lib/crypto/pkcs7_parser.h
@@ -0,0 +1,65 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* PKCS#7 crypto data parser internal definitions
+ *
+ * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ */
+
+#include <linux/oid_registry.h>
+#include <crypto/pkcs7.h>
+#include "x509_parser.h"
+
+#define kenter(FMT, ...) \
+ pr_devel("==> %s("FMT")\n", __func__, ##__VA_ARGS__)
+#define kleave(FMT, ...) \
+ pr_devel("<== %s()"FMT"\n", __func__, ##__VA_ARGS__)
+
+struct pkcs7_signed_info {
+ struct pkcs7_signed_info *next;
+ struct x509_certificate *signer; /* Signing certificate (in msg->certs) */
+ unsigned index;
+ bool unsupported_crypto; /* T if not usable due to missing crypto */
+ bool blacklisted;
+
+ /* Message digest - the digest of the Content Data (or NULL) */
+ const void *msgdigest;
+ unsigned msgdigest_len;
+
+ /* Authenticated Attribute data (or NULL) */
+ unsigned authattrs_len;
+ const void *authattrs;
+ unsigned long aa_set;
+#define sinfo_has_content_type 0
+#define sinfo_has_signing_time 1
+#define sinfo_has_message_digest 2
+#define sinfo_has_smime_caps 3
+#define sinfo_has_ms_opus_info 4
+#define sinfo_has_ms_statement_type 5
+ time64_t signing_time;
+
+ /* Message signature.
+ *
+ * This contains the generated digest of _either_ the Content Data or
+ * the Authenticated Attributes [RFC2315 9.3]. If the latter, one of
+ * the attributes contains the digest of the the Content Data within
+ * it.
+ *
+ * THis also contains the issuing cert serial number and issuer's name
+ * [PKCS#7 or CMS ver 1] or issuing cert's SKID [CMS ver 3].
+ */
+ struct public_key_signature *sig;
+};
+
+struct pkcs7_message {
+ struct x509_certificate *certs; /* Certificate list */
+ struct x509_certificate *crl; /* Revocation list */
+ struct pkcs7_signed_info *signed_infos;
+ u8 version; /* Version of cert (1 -> PKCS#7 or CMS; 3 -> CMS) */
+ bool have_authattrs; /* T if have authattrs */
+
+ /* Content Data (or NULL) */
+ enum OID data_type; /* Type of Data */
+ size_t data_len; /* Length of Data */
+ size_t data_hdrlen; /* Length of Data ASN.1 header */
+ const void *data; /* Content Data (or 0) */
+};