DM: crypto/rsa_mod_exp: Add rsa Modular Exponentiation DM driver

[platform/kernel/u-boot.git] / include / u-boot / rsa-mod-exp.h

diff --git a/include/u-boot/rsa-mod-exp.h b/include/u-boot/rsa-mod-exp.h
index 59cd9ea..fce445a 100644 (file)
--- a/include/u-boot/rsa-mod-exp.h
+++ b/include/u-boot/rsa-mod-exp.h
@@ -35,9 +35,41 @@ struct key_prop {
  * @sig:       RSA PKCS1.5 signature
  * @sig_len:   Length of signature in number of bytes
  * @node:      Node with RSA key elements like modulus, exponent, R^2, n0inv
- * @out:       Result in form of byte array
+ * @out:       Result in form of byte array of len equal to sig_len
  */
 int rsa_mod_exp_sw(const uint8_t *sig, uint32_t sig_len,
                struct key_prop *node, uint8_t *out);
 
+int rsa_mod_exp(struct udevice *dev, const uint8_t *sig, uint32_t sig_len,
+               struct key_prop *node, uint8_t *out);
+
+/**
+ * struct struct mod_exp_ops - Driver model for RSA Modular Exponentiation
+ *                             operations
+ *
+ * The uclass interface is implemented by all crypto devices which use
+ * driver model.
+ */
+struct mod_exp_ops {
+       /**
+        * Perform Modular Exponentiation
+        *
+        * Operation: out[] = sig ^ exponent % modulus
+        *
+        * @dev:        RSA Device
+        * @sig:        RSA PKCS1.5 signature
+        * @sig_len:    Length of signature in number of bytes
+        * @node:       Node with RSA key elements like modulus, exponent,
+        *              R^2, n0inv
+        * @out:        Result in form of byte array of len equal to sig_len
+        *
+        * This function computes exponentiation over the signature.
+        * Returns: 0 if exponentiation is successful, or a negative value
+        * if it wasn't.
+        */
+       int (*mod_exp)(struct udevice *dev, const uint8_t *sig,
+                          uint32_t sig_len, struct key_prop *node,
+                          uint8_t *outp);
+};
+
 #endif