PKCS#7: Provide a key type for testing PKCS#7

Provide a key type for testing the PKCS#7 parser.  It is given a non-detached
PKCS#7 message as payload:

	keyctl padd pkcs7_test a @s <stuff.pkcs7

The PKCS#7 wrapper is validated against the trusted certificates available and
then stripped off.  If successful, the key can be read, which will give the
data content of the PKCS#7 message.

A suitable message can be created by running make on the attached Makefile.
This will produce a file called stuff.pkcs7 for test loading.  The key3.x509
file should be put into the kernel source tree before it is built and
converted to DER form:

	openssl x509 -in .../pkcs7/key3.x509 -outform DER -out key3.x509

###############################################################################
#
# Create a pkcs7 message and sign it twice
#
#	openssl x509 -text -inform PEM -noout -in key2.x509
#
###############################################################################
stuff.pkcs7: stuff.txt key2.priv key2.x509 key4.priv key4.x509 certs
	$(RM) $@
	openssl smime -sign \
		-signer key2.x509 \
		-inkey key2.priv \
		-signer key4.x509 \
		-inkey key4.priv \
		-in stuff.txt \
		-certfile certs \
		-out $@ -binary -outform DER -nodetach
	openssl pkcs7 -inform DER -in stuff.pkcs7  -print_certs -noout
	openssl asn1parse -inform DER -in stuff.pkcs7  -i >out

stuff.txt:
	echo "The quick red fox jumped over the lazy brown dog" >stuff.txt

certs: key1.x509 key2.x509 key3.x509 key4.x509
	cat key{1,3}.x509 >$@

###############################################################################
#
# Generate a signed key
#
#	openssl x509 -text -inform PEM -noout -in key2.x509
#
###############################################################################
key2.x509: key2.x509_unsigned key1.priv key1.x509
	openssl x509 \
		-req -in key2.x509_unsigned \
		-out key2.x509 \
		-extfile key2.genkey -extensions myexts \
		-CA key1.x509 \
		-CAkey key1.priv \
		-CAcreateserial

key2.priv key2.x509_unsigned: key2.genkey
	openssl req -new -nodes -utf8 -sha1 -days 36500 \
		-batch -outform PEM \
		-config key2.genkey \
		-keyout key2.priv \
		-out key2.x509_unsigned

key2.genkey:
	@echo Generating X.509 key generation config
	@echo  >$@ "[ req ]"
	@echo >>$@ "default_bits = 4096"
	@echo >>$@ "distinguished_name = req_distinguished_name"
	@echo >>$@ "prompt = no"
	@echo >>$@ "string_mask = utf8only"
	@echo >>$@ "x509_extensions = myexts"
	@echo >>$@
	@echo >>$@ "[ req_distinguished_name ]"
	@echo >>$@ "O = Magrathea"
	@echo >>$@ "CN = PKCS7 key 2"
	@echo >>$@ "emailAddress = slartibartfast@magrathea.h2g2"
	@echo >>$@
	@echo >>$@ "[ myexts ]"
	@echo >>$@ "basicConstraints=critical,CA:FALSE"
	@echo >>$@ "keyUsage=digitalSignature"
	@echo >>$@ "subjectKeyIdentifier=hash"
	@echo >>$@ "authorityKeyIdentifier=keyid"

###############################################################################
#
# Generate a couple of signing keys
#
#	openssl x509 -text -inform PEM -noout -in key1.x509
#
###############################################################################
key1.x509: key1.x509_unsigned key4.priv key4.x509
	openssl x509 \
		-req -in key1.x509_unsigned \
		-out key1.x509 \
		-extfile key1.genkey -extensions myexts \
		-CA key4.x509 \
		-CAkey key4.priv \
		-CAcreateserial

key1.priv key1.x509_unsigned: key1.genkey
	openssl req -new -nodes -utf8 -sha1 -days 36500 \
		-batch -outform PEM \
		-config key1.genkey \
		-keyout key1.priv \
		-out key1.x509_unsigned

key1.genkey:
	@echo Generating X.509 key generation config
	@echo  >$@ "[ req ]"
	@echo >>$@ "default_bits = 4096"
	@echo >>$@ "distinguished_name = req_distinguished_name"
	@echo >>$@ "prompt = no"
	@echo >>$@ "string_mask = utf8only"
	@echo >>$@ "x509_extensions = myexts"
	@echo >>$@
	@echo >>$@ "[ req_distinguished_name ]"
	@echo >>$@ "O = Magrathea"
	@echo >>$@ "CN = PKCS7 key 1"
	@echo >>$@ "emailAddress = slartibartfast@magrathea.h2g2"
	@echo >>$@
	@echo >>$@ "[ myexts ]"
	@echo >>$@ "basicConstraints=critical,CA:TRUE"
	@echo >>$@ "keyUsage=digitalSignature,keyCertSign"
	@echo >>$@ "subjectKeyIdentifier=hash"
	@echo >>$@ "authorityKeyIdentifier=keyid"

###############################################################################
#
# Generate a signed key
#
#	openssl x509 -text -inform PEM -noout -in key4.x509
#
###############################################################################
key4.x509: key4.x509_unsigned key3.priv key3.x509
	openssl x509 \
		-req -in key4.x509_unsigned \
		-out key4.x509 \
		-extfile key4.genkey -extensions myexts \
		-CA key3.x509 \
		-CAkey key3.priv \
		-CAcreateserial

key4.priv key4.x509_unsigned: key4.genkey
	openssl req -new -nodes -utf8 -sha1 -days 36500 \
		-batch -outform PEM \
		-config key4.genkey \
		-keyout key4.priv \
		-out key4.x509_unsigned

key4.genkey:
	@echo Generating X.509 key generation config
	@echo  >$@ "[ req ]"
	@echo >>$@ "default_bits = 4096"
	@echo >>$@ "distinguished_name = req_distinguished_name"
	@echo >>$@ "prompt = no"
	@echo >>$@ "string_mask = utf8only"
	@echo >>$@ "x509_extensions = myexts"
	@echo >>$@
	@echo >>$@ "[ req_distinguished_name ]"
	@echo >>$@ "O = Magrathea"
	@echo >>$@ "CN = PKCS7 key 4"
	@echo >>$@ "emailAddress = slartibartfast@magrathea.h2g2"
	@echo >>$@
	@echo >>$@ "[ myexts ]"
	@echo >>$@ "basicConstraints=critical,CA:TRUE"
	@echo >>$@ "keyUsage=digitalSignature,keyCertSign"
	@echo >>$@ "subjectKeyIdentifier=hash"
	@echo >>$@ "authorityKeyIdentifier=keyid"

###############################################################################
#
# Generate a couple of signing keys
#
#	openssl x509 -text -inform PEM -noout -in key3.x509
#
###############################################################################
key3.priv key3.x509: key3.genkey
	openssl req -new -nodes -utf8 -sha1 -days 36500 \
		-batch -x509 -outform PEM \
		-config key3.genkey \
		-keyout key3.priv \
		-out key3.x509

key3.genkey:
	@echo Generating X.509 key generation config
	@echo  >$@ "[ req ]"
	@echo >>$@ "default_bits = 4096"
	@echo >>$@ "distinguished_name = req_distinguished_name"
	@echo >>$@ "prompt = no"
	@echo >>$@ "string_mask = utf8only"
	@echo >>$@ "x509_extensions = myexts"
	@echo >>$@
	@echo >>$@ "[ req_distinguished_name ]"
	@echo >>$@ "O = Magrathea"
	@echo >>$@ "CN = PKCS7 key 3"
	@echo >>$@ "emailAddress = slartibartfast@magrathea.h2g2"
	@echo >>$@
	@echo >>$@ "[ myexts ]"
	@echo >>$@ "basicConstraints=critical,CA:TRUE"
	@echo >>$@ "keyUsage=digitalSignature,keyCertSign"
	@echo >>$@ "subjectKeyIdentifier=hash"
	@echo >>$@ "authorityKeyIdentifier=keyid"

clean:
	$(RM) *~
	$(RM) key1.* key2.* key3.* key4.* stuff.* out certs

Signed-off-by: David Howells <dhowells@redhat.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/crypto/asymmetric_keys/Makefile b/crypto/asymmetric_keys/Makefile
index d63cb4320b96..92d0e9af24d5 100644
--- a/crypto/asymmetric_keys/Makefile
+++ b/crypto/asymmetric_keys/Makefile
@@ -40,3 +40,10 @@ $(obj)/pkcs7_parser.o: $(obj)/pkcs7-asn1.h
 $(obj)/pkcs7-asn1.o: $(obj)/pkcs7-asn1.c $(obj)/pkcs7-asn1.h
 
 clean-files	+= pkcs7-asn1.c pkcs7-asn1.h
+
+#
+# PKCS#7 parser testing key
+#
+obj-$(CONFIG_PKCS7_TEST_KEY) += pkcs7_test_key.o
+pkcs7_test_key-y := \
+	pkcs7_key_type.o