[PATCH v4 07/18] lib: crypto: allow to build crypyo in SPL

[Philippe Reynes]

This commit adds the options:
- SPL_ASYMMETRIC_KEY_TYPE
- SPL_ASYMMETRIC_PUBLIC_KEY_SUBTYPE
- SPL_RSA_PUBLIC_KEY_PARSER

Signed-off-by: Philippe Reynes <philippe.reynes at softathome.com>
---
 lib/Makefile        |  3 ++-
 lib/crypto/Kconfig  | 29 +++++++++++++++++++++++++++++
 lib/crypto/Makefile | 19 +++++++++++++------
 3 files changed, 44 insertions(+), 7 deletions(-)

diff --git a/lib/Makefile b/lib/Makefile
index fc284d68f8..7aaee3488b 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -17,7 +17,6 @@ obj-$(CONFIG_OF_LIVE) += of_live.o
 obj-$(CONFIG_CMD_DHRYSTONE) += dhry/
 obj-$(CONFIG_ARCH_AT91) += at91/
 obj-$(CONFIG_OPTEE_LIB) += optee/
-obj-y += crypto/
 
 obj-$(CONFIG_AES) += aes.o
 obj-$(CONFIG_AES) += aes/
@@ -63,6 +62,8 @@ obj-$(CONFIG_TPM_V1) += tpm-v1.o
 obj-$(CONFIG_TPM_V2) += tpm-v2.o
 endif
 
+obj-y += crypto/
+
 obj-$(CONFIG_$(SPL_TPL_)GENERATE_ACPI_TABLE) += acpi/
 obj-$(CONFIG_$(SPL_)MD5) += md5.o
 obj-$(CONFIG_ECDSA) += ecdsa/
diff --git a/lib/crypto/Kconfig b/lib/crypto/Kconfig
index 6369bafac0..509bc28311 100644
--- a/lib/crypto/Kconfig
+++ b/lib/crypto/Kconfig
@@ -8,6 +8,15 @@ menuconfig ASYMMETRIC_KEY_TYPE
 
 if ASYMMETRIC_KEY_TYPE
 
+config SPL_ASYMMETRIC_KEY_TYPE
+	bool "Asymmetric (public-key cryptographic) key Support within SPL"
+	depends on SPL
+	help
+	  This option provides support for a key type that holds the data for
+	  the asymmetric keys used for public key cryptographic operations such
+	  as encryption, decryption, signature generation and signature
+	  verification in the SPL.
+
 config ASYMMETRIC_PUBLIC_KEY_SUBTYPE
 	bool "Asymmetric public-key crypto algorithm subtype"
 	help
@@ -16,6 +25,15 @@ config ASYMMETRIC_PUBLIC_KEY_SUBTYPE
 	  appropriate hash algorithms (such as SHA-1) must be available.
 	  ENOPKG will be reported if the requisite algorithm is unavailable.
 
+config SPL_ASYMMETRIC_PUBLIC_KEY_SUBTYPE
+	bool "Asymmetric public-key crypto algorithm subtype within SPL"
+	depends on ASYMMETRIC_PUBLIC_KEY_SUBTYPE
+	help
+	  This option provides support for asymmetric public key type handling in the SPL.
+	  If signature generation and/or verification are to be used,
+	  appropriate hash algorithms (such as SHA-1) must be available.
+	  ENOPKG will be reported if the requisite algorithm is unavailable.
+
 config RSA_PUBLIC_KEY_PARSER
 	bool "RSA public key parser"
 	depends on ASYMMETRIC_PUBLIC_KEY_SUBTYPE
@@ -27,6 +45,17 @@ config RSA_PUBLIC_KEY_PARSER
 	  public key data and provides the ability to instantiate a public
 	  key.
 
+config SPL_RSA_PUBLIC_KEY_PARSER
+	bool "RSA public key parser within SPL"
+	depends on ASYMMETRIC_PUBLIC_KEY_SUBTYPE
+	select SPL_ASN1_DECODER
+	select ASN1_COMPILER
+	select SPL_OID_REGISTRY
+	help
+	  This option provides support for parsing a blob containing RSA
+	  public key data and provides the ability to instantiate a public
+	  key in the SPL.
+
 config X509_CERTIFICATE_PARSER
 	bool "X.509 certificate parser"
 	depends on ASYMMETRIC_PUBLIC_KEY_SUBTYPE
diff --git a/lib/crypto/Makefile b/lib/crypto/Makefile
index f3a414525d..6792b1d4f0 100644
--- a/lib/crypto/Makefile
+++ b/lib/crypto/Makefile
@@ -3,27 +3,34 @@
 # Makefile for asymmetric cryptographic keys
 #
 
-obj-$(CONFIG_ASYMMETRIC_KEY_TYPE) += asymmetric_keys.o
+obj-$(CONFIG_$(SPL_)ASYMMETRIC_KEY_TYPE) += asymmetric_keys.o
 
 asymmetric_keys-y := asymmetric_type.o
 
-obj-$(CONFIG_ASYMMETRIC_PUBLIC_KEY_SUBTYPE) += public_key.o
+obj-$(CONFIG_$(SPL_)ASYMMETRIC_PUBLIC_KEY_SUBTYPE) += public_key.o
 
 #
 # RSA public key parser
 #
-obj-$(CONFIG_RSA_PUBLIC_KEY_PARSER) += rsa_public_key.o
+obj-$(CONFIG_$(SPL_)RSA_PUBLIC_KEY_PARSER) += rsa_public_key.o
 rsa_public_key-y := \
 	rsapubkey.asn1.o \
 	rsa_helper.o
 
 $(obj)/rsapubkey.asn1.o: $(obj)/rsapubkey.asn1.c $(obj)/rsapubkey.asn1.h
+ifdef CONFIG_SPL_BUILD
+CFLAGS_rsapubkey.asn1.o += -I$(obj)
+endif
+
 $(obj)/rsa_helper.o: $(obj)/rsapubkey.asn1.h
+ifdef CONFIG_SPL_BUILD
+CFLAGS_rsa_helper.o += -I$(obj)
+endif
 
 #
 # X.509 Certificate handling
 #
-obj-$(CONFIG_X509_CERTIFICATE_PARSER) += x509_key_parser.o
+obj-$(CONFIG_$(SPL_)X509_CERTIFICATE_PARSER) += x509_key_parser.o
 x509_key_parser-y := \
 	x509.asn1.o \
 	x509_akid.asn1.o \
@@ -40,11 +47,11 @@ $(obj)/x509_akid.asn1.o: $(obj)/x509_akid.asn1.c $(obj)/x509_akid.asn1.h
 #
 # PKCS#7 message handling
 #
-obj-$(CONFIG_PKCS7_MESSAGE_PARSER) += pkcs7_message.o
+obj-$(CONFIG_$(SPL_)PKCS7_MESSAGE_PARSER) += pkcs7_message.o
 pkcs7_message-y := \
 	pkcs7.asn1.o \
 	pkcs7_parser.o
-obj-$(CONFIG_PKCS7_VERIFY) += pkcs7_verify.o
+obj-$(CONFIG_$(SPL_)PKCS7_VERIFY) += pkcs7_verify.o
 
 $(obj)/pkcs7_parser.o: $(obj)/pkcs7.asn1.h
 $(obj)/pkcs7.asn1.o: $(obj)/pkcs7.asn1.c $(obj)/pkcs7.asn1.h
-- 
2.17.1