1 files changed, 91 insertions, 0 deletions
diff --git a/lib/crypto/c_src/digest.c b/lib/crypto/c_src/digest.c
new file mode 100644
index 0000000000..ba879ab464
--- /dev/null
+++ b/lib/crypto/c_src/digest.c
@@ -0,0 +1,91 @@
+#include "digest.h"
+
+static struct digest_type_t digest_types[] =
+{
+    {{"md4"}, {&EVP_md4}},
+    {{"md5"}, {&EVP_md5}},
+    {{"ripemd160"}, {&EVP_ripemd160}},
+    {{"sha"}, {&EVP_sha1}},
+    {{"sha224"},
+#ifdef HAVE_SHA224
+     {&EVP_sha224}
+#else
+     {NULL}
+#endif
+    },
+    {{"sha256"},
+#ifdef HAVE_SHA256
+     {&EVP_sha256}
+#else
+     {NULL}
+#endif
+    },
+    {{"sha384"},
+#ifdef HAVE_SHA384
+     {&EVP_sha384}
+#else
+     {NULL}
+#endif
+    },
+    {{"sha512"},
+#ifdef HAVE_SHA512
+     {&EVP_sha512}
+#else
+     {NULL}
+#endif
+    },
+    {{"sha3_224"},
+#ifdef HAVE_SHA3_224
+     {&EVP_sha3_224}
+#else
+     {NULL}
+#endif
+    },
+    {{"sha3_256"},
+#ifdef HAVE_SHA3_256
+     {&EVP_sha3_256}
+#else
+     {NULL}
+#endif
+    },
+    {{"sha3_384"},
+#ifdef HAVE_SHA3_384
+     {&EVP_sha3_384}
+#else
+     {NULL}
+#endif
+    },
+    {{"sha3_512"},
+#ifdef HAVE_SHA3_512
+     {&EVP_sha3_512}
+#else
+     {NULL}
+#endif
+    },
+
+    {{NULL}}
+};
+
+void init_digest_types(ErlNifEnv* env)
+{
+    struct digest_type_t* p = digest_types;
+
+    for (p = digest_types; p->type.str; p++) {
+	p->type.atom = enif_make_atom(env, p->type.str);
+	if (p->md.funcp)
+	    p->md.p = p->md.funcp();
+    }
+    p->type.atom = atom_false;  /* end marker */
+}
+
+struct digest_type_t* get_digest_type(ERL_NIF_TERM type)
+{
+    struct digest_type_t* p = NULL;
+    for (p = digest_types; p->type.atom != atom_false; p++) {
+	if (type == p->type.atom) {
+	    return p;
+	}
+    }
+    return NULL;
+}
+