HKDF (does not work yet)

[oweals/gnunet.git] / src / include / gnunet_crypto_lib.h

diff --git a/src/include/gnunet_crypto_lib.h b/src/include/gnunet_crypto_lib.h
index d31dfcfa69fe048f0d687fb7549cf76fdc90682e..479e0e42dd6030e1c1931d9197b798667400a7b7 100644 (file)
--- a/src/include/gnunet_crypto_lib.h
+++ b/src/include/gnunet_crypto_lib.h
@@ -511,6 +511,27 @@ int GNUNET_CRYPTO_hash_xorcmp (const GNUNET_HashCode * h1,
                                const GNUNET_HashCode * target);
 
 
+/**
+ * @brief Derive key
+ * @param xtr_algo hash algorithm for the extraction phase, GCRY_MD_...
+ * @param prf_algo hash algorithm for the expansion phase, GCRY_MD_...
+ * @param xts salt
+ * @param xts_len length of xts
+ * @param skm source key material
+ * @param skm_len length of skm
+ * @param ctx context info
+ * @param ctx_len length of ctx
+ * @param out_len desired length of the derived key
+ * @param result buffer for the derived key, allocated by caller
+ * @return GNUNET_YES on success
+ */
+int
+GNUNET_CRYPTO_hkdf (int xtr_algo, int prf_algo, const void *xts,
+    const size_t xts_len, const void *skm, const size_t skm_len,
+    const void *ctx, const size_t ctx_len, const unsigned long long out_len,
+    void *result);
+
+
 /**
  * Create a new private key. Caller must free return value.
  *