Merge branch 'next'

1 files changed, 24 insertions, 0 deletions

diff --git a/include/rsa.h b/include/rsa.h
index add4c78..a5680ab 100644
--- a/include/rsa.h
+++ b/include/rsa.h
@@ -15,6 +15,20 @@
 #include <errno.h>
 #include <image.h>
 
+/**
+ * struct rsa_public_key - holder for a public key
+ *
+ * An RSA public key consists of a modulus (typically called N), the inverse
+ * and R^2, where R is 2^(# key bits).
+ */
+
+struct rsa_public_key {
+	uint len;		/* len of modulus[] in number of uint32_t */
+	uint32_t n0inv;		/* -1 / modulus[0] mod 2^32 */
+	uint32_t *modulus;	/* modulus as little endian array */
+	uint32_t *rr;		/* R^2 as little endian array */
+};
+
 #if IMAGE_ENABLE_SIGN
 /**
  * sign() - calculate and return signature for given input data
@@ -89,4 +103,14 @@ static inline int rsa_verify(struct image_sign_info *info,
 }
 #endif
 
+#define RSA2048_BYTES	(2048 / 8)
+#define RSA4096_BYTES	(4096 / 8)
+
+/* This is the minimum/maximum key size we support, in bits */
+#define RSA_MIN_KEY_BITS	2048
+#define RSA_MAX_KEY_BITS	4096
+
+/* This is the maximum signature length that we support, in bits */
+#define RSA_MAX_SIG_BITS	4096
+
 #endif