diff --git a/crypto/ripemd.h b/crypto/ripemd.h
new file mode 100644
index 0000000..2858e22
--- /dev/null
+++ b/crypto/ripemd.h
@@ -0,0 +1,26 @@
+/*
+ * Common values for RIPEMD algorithms
+ */
+
+#ifndef _CRYPTO_RMD_H
+#define _CRYPTO_RMD_H
+
+#define RMD128_DIGEST_SIZE      16
+#define RMD128_BLOCK_SIZE       64
+
+#define RMD160_DIGEST_SIZE      20
+#define RMD160_BLOCK_SIZE       64
+
+#define RMD256_DIGEST_SIZE      32
+#define RMD256_BLOCK_SIZE       64
+
+#define RMD320_DIGEST_SIZE      40
+#define RMD320_BLOCK_SIZE       64
+
+#define RMD_H0  0x67452301UL
+#define RMD_H1  0xefcdab89UL
+#define RMD_H2  0x98badcfeUL
+#define RMD_H3  0x10325476UL
+#define RMD_H4  0xc3d2e1f0UL
+
+#endif