Move pkcs7_get_content_data as a helper function that can be
shared by legacy crypto lib and MbedTLS implementation.
Signed-off-by: Raymond Mao <raymond....@linaro.org>
---
Changes in v4
- Initial patch.
lib/crypto/Makefile | 1 +
lib/crypto/pkcs7_helper.c | 40 +++++++++++++++++++++++++++++++++++++++
lib/crypto/pkcs7_parser.c | 28 ---------------------------
3 files changed, 41 insertions(+), 28 deletions(-)
create mode 100644 lib/crypto/pkcs7_helper.c
diff --git a/lib/crypto/Makefile b/lib/crypto/Makefile
index 946cc3a7b59..16059088f26 100644
--- a/lib/crypto/Makefile
+++ b/lib/crypto/Makefile
@@ -53,6 +53,7 @@ $(obj)/x509_akid.asn1.o: $(obj)/x509_akid.asn1.c
$(obj)/x509_akid.asn1.h
obj-$(CONFIG_$(SPL_)PKCS7_MESSAGE_PARSER) += pkcs7_message.o
pkcs7_message-y := \
pkcs7.asn1.o \
+ pkcs7_helper.o \
pkcs7_parser.o
obj-$(CONFIG_$(SPL_)PKCS7_VERIFY) += pkcs7_verify.o
diff --git a/lib/crypto/pkcs7_helper.c b/lib/crypto/pkcs7_helper.c
new file mode 100644
index 00000000000..6c8dcd1a935
--- /dev/null
+++ b/lib/crypto/pkcs7_helper.c
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * PKCS7 helper functions
+ *
+ * Copyright (c) 2012 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowe...@redhat.com)
+ *
+ * Copyright (c) 2024 Linaro Limited
+ * Author: Raymond Mao <raymond....@linaro.org>
+ */
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <crypto/pkcs7_parser.h>
+
+/**
+ * pkcs7_get_content_data - Get access to the PKCS#7 content
+ * @pkcs7: The preparsed PKCS#7 message to access
+ * @_data: Place to return a pointer to the data
+ * @_data_len: Place to return the data length
+ * @_headerlen: Size of ASN.1 header not included in _data
+ *
+ * Get access to the data content of the PKCS#7 message. The size of the
+ * header of the ASN.1 object that contains it is also provided and can be used
+ * to adjust *_data and *_data_len to get the entire object.
+ *
+ * Returns -ENODATA if the data object was missing from the message.
+ */
+int pkcs7_get_content_data(const struct pkcs7_message *pkcs7,
+ const void **_data, size_t *_data_len,
+ size_t *_headerlen)
+{
+ if (!pkcs7->data)
+ return -ENODATA;
+
+ *_data = pkcs7->data;
+ *_data_len = pkcs7->data_len;
+ if (_headerlen)
+ *_headerlen = pkcs7->data_hdrlen;
+ return 0;
+}
diff --git a/lib/crypto/pkcs7_parser.c b/lib/crypto/pkcs7_parser.c
index d5efa828d6a..c849dc0d92d 100644
--- a/lib/crypto/pkcs7_parser.c
+++ b/lib/crypto/pkcs7_parser.c
@@ -182,34 +182,6 @@ out_no_ctx:
}
EXPORT_SYMBOL_GPL(pkcs7_parse_message);
-/**
- * pkcs7_get_content_data - Get access to the PKCS#7 content
- * @pkcs7: The preparsed PKCS#7 message to access
- * @_data: Place to return a pointer to the data
- * @_data_len: Place to return the data length
- * @_headerlen: Size of ASN.1 header not included in _data
- *
- * Get access to the data content of the PKCS#7 message. The size of the
- * header of the ASN.1 object that contains it is also provided and can be used
- * to adjust *_data and *_data_len to get the entire object.
- *
- * Returns -ENODATA if the data object was missing from the message.
- */
-int pkcs7_get_content_data(const struct pkcs7_message *pkcs7,
- const void **_data, size_t *_data_len,
- size_t *_headerlen)
-{
- if (!pkcs7->data)
- return -ENODATA;
-
- *_data = pkcs7->data;
- *_data_len = pkcs7->data_len;
- if (_headerlen)
- *_headerlen = pkcs7->data_hdrlen;
- return 0;
-}
-EXPORT_SYMBOL_GPL(pkcs7_get_content_data);
-
/*
* Note an OID when we find one for later processing when we know how
* to interpret it.
--
2.25.1
