1 files changed, 75 insertions, 0 deletions
diff --git a/src/providers/dime/common/dcrypto.h b/src/providers/dime/common/dcrypto.h
new file mode 100644
index 00000000..677ee32c
--- /dev/null
+++ b/src/providers/dime/common/dcrypto.h
@@ -0,0 +1,75 @@
+#ifndef CRYPTO_H
+#define CRYPTO_H
+
+#include <openssl/obj_mac.h>
+#include <openssl/ec.h>
+#include <openssl/ecdsa.h>
+#include <openssl/pem.h>
+
+#include "dime/ed25519/ed25519.h"
+#include "dime/common/error.h"
+
+#define AES_256_PADDING_SIZE 16
+#define AES_256_KEY_SIZE     32
+#define AES_256_KEK_SIZE     48
+
+#define EC_SIGNING_CURVE NID_secp256k1
+#define EC_ENCRYPT_CURVE NID_secp256k1
+
+#define ED25519_KEY_SIZE     32
+#define ED25519_KEY_B64_SIZE 43
+#define ED25519_SIG_SIZE     64
+#define ED25519_SIG_B64_SIZE 86
+#define EC_PUBKEY_SIZE       65
+
+// Wrappers around ED25519 functions
+typedef struct {
+    ed25519_secret_key private_key;
+    ed25519_public_key public_key;
+} ED25519_KEY;
+
+
+// Initialization and finalization routines.
+PUBLIC_FUNC_DECL(int,             crypto_init,              void);
+PUBLIC_FUNC_DECL(void,            crypto_shutdown,          void);
+
+// Generating, loading, and freeing elliptical curve keys.
+PUBLIC_FUNC_DECL(EC_KEY *,        load_ec_privkey,          const char *filename);
+PUBLIC_FUNC_DECL(EC_KEY *,        load_ec_pubkey,           const char *filename);
+PUBLIC_FUNC_DECL(EC_KEY *,        generate_ec_keypair, void);
+PUBLIC_FUNC_DECL(void,            free_ec_key,              EC_KEY *key);
+
+// EC signature routines.
+PUBLIC_FUNC_DECL(unsigned char *, ec_sign_data,             const unsigned char *hash, size_t hlen, EC_KEY *key, size_t *siglen);
+PUBLIC_FUNC_DECL(unsigned char *, ec_sign_sha_data,         const unsigned char *data, size_t dlen, unsigned int shabits, EC_KEY *key, size_t *siglen);
+PUBLIC_FUNC_DECL(int,             verify_ec_signature,      const unsigned char *hash, size_t hlen, const unsigned char *sig, size_t slen, EC_KEY *key);
+PUBLIC_FUNC_DECL(int,             verify_ec_sha_signature,  const unsigned char *data, size_t dlen, unsigned int shabits, const unsigned char *sig, size_t slen, EC_KEY *key);
+
+// Other EC-related routines.
+PUBLIC_FUNC_DECL(void *,          ecies_env_derivation,     const void *input, size_t ilen, void *output, size_t *olen);
+PUBLIC_FUNC_DECL(int,             compute_aes256_kek,       EC_KEY *public_key, EC_KEY *private_key, unsigned char *keybuf);
+
+// EC key serialization/deserialization.
+PUBLIC_FUNC_DECL(unsigned char *, serialize_ec_pubkey,      EC_KEY *key, size_t *outsize);
+PUBLIC_FUNC_DECL(EC_KEY *,        deserialize_ec_pubkey,    const unsigned char *buf, size_t blen, int signing);
+PUBLIC_FUNC_DECL(unsigned char *, serialize_ec_privkey,     EC_KEY *key, size_t *outsize);
+PUBLIC_FUNC_DECL(EC_KEY *,        deserialize_ec_privkey,   const unsigned char *buf, size_t blen, int signing);
+
+// ED25519 key routines.
+PUBLIC_FUNC_DECL(ED25519_KEY *,   load_ed25519_privkey,     const char *filename);
+PUBLIC_FUNC_DECL(ED25519_KEY *,   generate_ed25519_keypair, void);
+PUBLIC_FUNC_DECL(int,             ed25519_sign_data,        const unsigned char *data, size_t dlen, ED25519_KEY *key, ed25519_signature sigbuf);
+PUBLIC_FUNC_DECL(int,             ed25519_verify_sig,       const unsigned char *data, size_t dlen, ED25519_KEY *key, ed25519_signature sigbuf);
+PUBLIC_FUNC_DECL(void,            free_ed25519_key,         ED25519_KEY *key);
+PUBLIC_FUNC_DECL(void,            free_ed25519_key_chain,         ED25519_KEY **keys);
+PUBLIC_FUNC_DECL(ED25519_KEY *,   deserialize_ed25519_pubkey, const unsigned char *serial_pubkey);
+PUBLIC_FUNC_DECL(ED25519_KEY *,   deserialize_ed25519_privkey, const unsigned char *serial_privkey);
+
+// Symmetric encryption routines.
+PUBLIC_FUNC_DECL(int,             encrypt_aes_256,          unsigned char *outbuf, const unsigned char *data, size_t dlen, const unsigned char *key, const unsigned char *iv);
+PUBLIC_FUNC_DECL(int,             decrypt_aes_256,          unsigned char *outbuf, const unsigned char *data, size_t dlen, const unsigned char *key, const unsigned char *iv);
+
+// Miscellaneous.
+PUBLIC_FUNC_DECL(int,             get_random_bytes,         void *buf, size_t len);
+
+#endif