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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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7
common/image-sig.c
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@ -27,8 +27,15 @@ DECLARE_GLOBAL_DATA_PTR;
#endif /* !USE_HOSTCC*/
#include <errno.h>
#include <image.h>
#include <rsa.h>
struct image_sig_algo image_sig_algos[] = {
{
"sha1,rsa2048",
rsa_sign,
rsa_add_verify_data,
rsa_verify,
}
};
struct image_sig_algo *image_get_sig_algo(const char *name)