add package signing code

[zpackage] / crypto / libeddsa / lib / eddsa.h

diff --git a/crypto/libeddsa/lib/eddsa.h b/crypto/libeddsa/lib/eddsa.h
new file mode 100644 (file)
index 0000000..fe00c88
--- /dev/null
+++ b/crypto/libeddsa/lib/eddsa.h
@@ -0,0 +1,122 @@
+#ifndef EDDSA_H
+#define EDDSA_H
+
+#include <stddef.h>    /* for size_t */
+#include <stdbool.h>   /* foor bool */
+#include <stdint.h>    /* for uint8_t */
+
+#ifndef __has_attribute
+#define __has_attribute(x) 0
+#endif
+
+#ifndef EDDSA_STATIC
+#  if defined(_WIN32) || defined(__CYGWIN__)
+#    ifdef EDDSA_BUILD
+#      define EDDSA_DECL __declspec(dllexport)
+#    else
+#      define EDDSA_DECL __declspec(dllimport)
+#    endif
+#  elif defined(EDDSA_BUILD) && defined(__GNUC__) && __GNUC__ >= 4
+#    define EDDSA_DECL __attribute__((visibility ("default")))
+#  elif defined(EDDSA_BUILD) && defined(__CLANG__) && __has_attribute(visibility)
+#    define EDDSA_DECL __attribute__((visibility ("default")))
+#  endif
+#endif
+
+#ifndef EDDSA_DECL
+#define EDDSA_DECL
+#endif
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+
+/*
+ * Ed25519 DSA
+ */
+
+#define ED25519_KEY_LEN                32
+#define ED25519_SIG_LEN                64
+
+EDDSA_DECL void        ed25519_genpub(uint8_t pub[ED25519_KEY_LEN],
+                              const uint8_t sec[ED25519_KEY_LEN]);
+
+EDDSA_DECL void        ed25519_sign(uint8_t sig[ED25519_SIG_LEN],
+                            const uint8_t sec[ED25519_KEY_LEN],
+                            const uint8_t pub[ED25519_KEY_LEN],
+                            const uint8_t *data, size_t len);
+
+EDDSA_DECL bool        ed25519_verify(const uint8_t sig[ED25519_SIG_LEN],
+                              const uint8_t pub[ED25519_KEY_LEN],
+                              const uint8_t *data, size_t len);
+
+
+
+/*
+ * X25519 Diffie-Hellman
+ */
+
+#define X25519_KEY_LEN         32
+
+EDDSA_DECL void        x25519_base(uint8_t out[X25519_KEY_LEN],
+                           const uint8_t scalar[X25519_KEY_LEN]);
+
+EDDSA_DECL void        x25519(uint8_t out[X25519_KEY_LEN],
+                      const uint8_t scalar[X25519_KEY_LEN],
+                      const uint8_t point[X25519_KEY_LEN]);
+
+
+
+/*
+ * Key-conversion between ed25519 and x25519
+ */
+
+EDDSA_DECL void pk_ed25519_to_x25519(uint8_t out[X25519_KEY_LEN],
+                                    const uint8_t in[ED25519_KEY_LEN]);
+
+EDDSA_DECL void sk_ed25519_to_x25519(uint8_t out[X25519_KEY_LEN],
+                                    const uint8_t in[ED25519_KEY_LEN]);
+
+
+
+
+
+/*
+ * Obsolete Interface
+ */
+
+/* eddsa */
+EDDSA_DECL void        eddsa_genpub(uint8_t pub[32], const uint8_t sec[32]);
+
+EDDSA_DECL void        eddsa_sign(uint8_t sig[64],
+                          const uint8_t sec[32],
+                          const uint8_t pub[32],
+                          const uint8_t *data, size_t len);
+
+EDDSA_DECL bool        eddsa_verify(const uint8_t sig[64],
+                            const uint8_t pub[32],
+                            const uint8_t *data, size_t len);
+
+
+/* diffie-hellman */
+EDDSA_DECL void        DH(uint8_t out[32], const uint8_t sec[32],
+                  const uint8_t point[32]);
+
+
+/* key conversion */
+EDDSA_DECL void eddsa_pk_eddsa_to_dh(uint8_t out[32],
+                                    const uint8_t in[32]);
+
+EDDSA_DECL void eddsa_sk_eddsa_to_dh(uint8_t out[32],
+                                    const uint8_t in[32]);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif