-also cover private key case

1 files changed, 23 insertions, 0 deletions

diff --git a/src/util/crypto_ecc.c b/src/util/crypto_ecc.c
index 25393cbf6..429d2bf4b 100644
--- a/src/util/crypto_ecc.c
+++ b/src/util/crypto_ecc.c
@@ -1561,4 +1561,27 @@ GNUNET_CRYPTO_ecdsa_public_to_ecdhe (const struct GNUNET_CRYPTO_EcdsaPublicKey *
 }
 
 
+
+/**
+ * @ingroup crypto
+ * Convert ECDSA private key to ECDHE private key.
+ * Please be very careful when using this function, as mixing
+ * cryptographic primitives is not always healthy.
+ *
+ * @param ecdsa ecdsa private key
+ * @param ecdhe[OUT] ecdhe private key
+ */
+void
+GNUNET_CRYPTO_ecdsa_private_to_ecdhe (const struct GNUNET_CRYPTO_EcdsaPrivateKey *ecdsa,
+                                     struct GNUNET_CRYPTO_EcdhePrivateKey *ecdhe)
+{
+  GNUNET_assert (sizeof (struct GNUNET_CRYPTO_EcdhePrivateKey) ==
+                 sizeof (struct GNUNET_CRYPTO_EcdsaPrivateKey));
+  memcpy (ecdhe,
+          ecdsa,
+          sizeof (struct GNUNET_CRYPTO_EcdhePrivateKey));
+
+}
+
+
 /* end of crypto_ecc.c */