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image: Add RSA support for image signing

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RSA provides a public key encryption facility which is ideal for image
signing and verification.

Images are signed using a private key by mkimage. Then at run-time, the
images are verified using a private key.

This implementation uses openssl for the host part (mkimage). To avoid
bringing large libraries into the U-Boot binary, the RSA public key
is encoded using a simple numeric representation in the device tree.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2013-06-13 15:10:02 -07:00
committed by Tom Rini
parent 56518e7104
commit 19c402afa2
9 changed files with 1031 additions and 2 deletions
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config.mk
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@@ -96,6 +96,7 @@ HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp")
HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress")
else
HOSTCC = gcc
HOSTLIBS += -lssl -lcrypto
endif
ifeq ($(HOSTOS),cygwin)