AstroBWT algorithm (DERO) support

To test:

- Download https://github.com/deroproject/derosuite/releases/tag/AstroBWT
- Run daemon with `--testnet` in command line

In config.json:
- "coin":"dero"
- "url":"127.0.0.1:30306"
- "daemon:"true"

src/crypto/astrobwt/salsa20_ref/ecrypt-sync.h

@@ -0,0 +1,279 @@
+/* ecrypt-sync.h */
+
+/* 
+ * Header file for synchronous stream ciphers without authentication
+ * mechanism.
+ * 
+ * *** Please only edit parts marked with "[edit]". ***
+ */
+
+#ifndef ECRYPT_SYNC
+#define ECRYPT_SYNC
+
+#include "ecrypt-portable.h"
+
+/* ------------------------------------------------------------------------- */
+
+/* Cipher parameters */
+
+/* 
+ * The name of your cipher.
+ */
+#define ECRYPT_NAME "Salsa20"    /* [edit] */ 
+#define ECRYPT_PROFILE "S!_H."
+
+/*
+ * Specify which key and IV sizes are supported by your cipher. A user
+ * should be able to enumerate the supported sizes by running the
+ * following code:
+ *
+ * for (i = 0; ECRYPT_KEYSIZE(i) <= ECRYPT_MAXKEYSIZE; ++i)
+ *   {
+ *     keysize = ECRYPT_KEYSIZE(i);
+ *
+ *     ...
+ *   }
+ *
+ * All sizes are in bits.
+ */
+
+#define ECRYPT_MAXKEYSIZE 256                 /* [edit] */
+#define ECRYPT_KEYSIZE(i) (128 + (i)*128)     /* [edit] */
+
+#define ECRYPT_MAXIVSIZE 64                   /* [edit] */
+#define ECRYPT_IVSIZE(i) (64 + (i)*64)        /* [edit] */
+
+/* ------------------------------------------------------------------------- */
+
+/* Data structures */
+
+/* 
+ * ECRYPT_ctx is the structure containing the representation of the
+ * internal state of your cipher. 
+ */
+
+typedef struct
+{
+  u32 input[16]; /* could be compressed */
+  /* 
+   * [edit]
+   *
+   * Put here all state variable needed during the encryption process.
+   */
+} ECRYPT_ctx;
+
+/* ------------------------------------------------------------------------- */
+
+/* Mandatory functions */
+
+/*
+ * Key and message independent initialization. This function will be
+ * called once when the program starts (e.g., to build expanded S-box
+ * tables).
+ */
+void ECRYPT_init();
+
+/*
+ * Key setup. It is the user's responsibility to select the values of
+ * keysize and ivsize from the set of supported values specified
+ * above.
+ */
+void ECRYPT_keysetup(
+  ECRYPT_ctx* ctx, 
+  const u8* key, 
+  u32 keysize,                /* Key size in bits. */ 
+  u32 ivsize);                /* IV size in bits. */ 
+
+/*
+ * IV setup. After having called ECRYPT_keysetup(), the user is
+ * allowed to call ECRYPT_ivsetup() different times in order to
+ * encrypt/decrypt different messages with the same key but different
+ * IV's.
+ */
+void ECRYPT_ivsetup(
+  ECRYPT_ctx* ctx, 
+  const u8* iv);
+
+/*
+ * Encryption/decryption of arbitrary length messages.
+ *
+ * For efficiency reasons, the API provides two types of
+ * encrypt/decrypt functions. The ECRYPT_encrypt_bytes() function
+ * (declared here) encrypts byte strings of arbitrary length, while
+ * the ECRYPT_encrypt_blocks() function (defined later) only accepts
+ * lengths which are multiples of ECRYPT_BLOCKLENGTH.
+ * 
+ * The user is allowed to make multiple calls to
+ * ECRYPT_encrypt_blocks() to incrementally encrypt a long message,
+ * but he is NOT allowed to make additional encryption calls once he
+ * has called ECRYPT_encrypt_bytes() (unless he starts a new message
+ * of course). For example, this sequence of calls is acceptable:
+ *
+ * ECRYPT_keysetup();
+ *
+ * ECRYPT_ivsetup();
+ * ECRYPT_encrypt_blocks();
+ * ECRYPT_encrypt_blocks();
+ * ECRYPT_encrypt_bytes();
+ *
+ * ECRYPT_ivsetup();
+ * ECRYPT_encrypt_blocks();
+ * ECRYPT_encrypt_blocks();
+ *
+ * ECRYPT_ivsetup();
+ * ECRYPT_encrypt_bytes();
+ * 
+ * The following sequence is not:
+ *
+ * ECRYPT_keysetup();
+ * ECRYPT_ivsetup();
+ * ECRYPT_encrypt_blocks();
+ * ECRYPT_encrypt_bytes();
+ * ECRYPT_encrypt_blocks();
+ */
+
+void ECRYPT_encrypt_bytes(
+  ECRYPT_ctx* ctx, 
+  const u8* plaintext, 
+  u8* ciphertext, 
+  u32 msglen);                /* Message length in bytes. */ 
+
+void ECRYPT_decrypt_bytes(
+  ECRYPT_ctx* ctx, 
+  const u8* ciphertext, 
+  u8* plaintext, 
+  u32 msglen);                /* Message length in bytes. */ 
+
+/* ------------------------------------------------------------------------- */
+
+/* Optional features */
+
+/* 
+ * For testing purposes it can sometimes be useful to have a function
+ * which immediately generates keystream without having to provide it
+ * with a zero plaintext. If your cipher cannot provide this function
+ * (e.g., because it is not strictly a synchronous cipher), please
+ * reset the ECRYPT_GENERATES_KEYSTREAM flag.
+ */
+
+#define ECRYPT_GENERATES_KEYSTREAM
+#ifdef ECRYPT_GENERATES_KEYSTREAM
+
+void ECRYPT_keystream_bytes(
+  ECRYPT_ctx* ctx,
+  u8* keystream,
+  u32 length);                /* Length of keystream in bytes. */
+
+#endif
+
+/* ------------------------------------------------------------------------- */
+
+/* Optional optimizations */
+
+/* 
+ * By default, the functions in this section are implemented using
+ * calls to functions declared above. However, you might want to
+ * implement them differently for performance reasons.
+ */
+
+/*
+ * All-in-one encryption/decryption of (short) packets.
+ *
+ * The default definitions of these functions can be found in
+ * "ecrypt-sync.c". If you want to implement them differently, please
+ * undef the ECRYPT_USES_DEFAULT_ALL_IN_ONE flag.
+ */
+#define ECRYPT_USES_DEFAULT_ALL_IN_ONE        /* [edit] */
+
+void ECRYPT_encrypt_packet(
+  ECRYPT_ctx* ctx, 
+  const u8* iv,
+  const u8* plaintext, 
+  u8* ciphertext, 
+  u32 msglen);
+
+void ECRYPT_decrypt_packet(
+  ECRYPT_ctx* ctx, 
+  const u8* iv,
+  const u8* ciphertext, 
+  u8* plaintext, 
+  u32 msglen);
+
+/*
+ * Encryption/decryption of blocks.
+ * 
+ * By default, these functions are defined as macros. If you want to
+ * provide a different implementation, please undef the
+ * ECRYPT_USES_DEFAULT_BLOCK_MACROS flag and implement the functions
+ * declared below.
+ */
+
+#define ECRYPT_BLOCKLENGTH 64                  /* [edit] */
+
+#define ECRYPT_USES_DEFAULT_BLOCK_MACROS      /* [edit] */
+#ifdef ECRYPT_USES_DEFAULT_BLOCK_MACROS
+
+#define ECRYPT_encrypt_blocks(ctx, plaintext, ciphertext, blocks)  \
+  ECRYPT_encrypt_bytes(ctx, plaintext, ciphertext,                 \
+    (blocks) * ECRYPT_BLOCKLENGTH)
+
+#define ECRYPT_decrypt_blocks(ctx, ciphertext, plaintext, blocks)  \
+  ECRYPT_decrypt_bytes(ctx, ciphertext, plaintext,                 \
+    (blocks) * ECRYPT_BLOCKLENGTH)
+
+#ifdef ECRYPT_GENERATES_KEYSTREAM
+
+#define ECRYPT_keystream_blocks(ctx, keystream, blocks)            \
+  ECRYPT_keystream_bytes(ctx, keystream,                        \
+    (blocks) * ECRYPT_BLOCKLENGTH)
+
+#endif
+
+#else
+
+void ECRYPT_encrypt_blocks(
+  ECRYPT_ctx* ctx, 
+  const u8* plaintext, 
+  u8* ciphertext, 
+  u32 blocks);                /* Message length in blocks. */ 
+
+void ECRYPT_decrypt_blocks(
+  ECRYPT_ctx* ctx, 
+  const u8* ciphertext, 
+  u8* plaintext, 
+  u32 blocks);                /* Message length in blocks. */ 
+
+#ifdef ECRYPT_GENERATES_KEYSTREAM
+
+void ECRYPT_keystream_blocks(
+  ECRYPT_ctx* ctx,
+  const u8* keystream,
+  u32 blocks);                /* Keystream length in blocks. */ 
+
+#endif
+
+#endif
+
+/*
+ * If your cipher can be implemented in different ways, you can use
+ * the ECRYPT_VARIANT parameter to allow the user to choose between
+ * them at compile time (e.g., gcc -DECRYPT_VARIANT=3 ...). Please
+ * only use this possibility if you really think it could make a
+ * significant difference and keep the number of variants
+ * (ECRYPT_MAXVARIANT) as small as possible (definitely not more than
+ * 10). Note also that all variants should have exactly the same
+ * external interface (i.e., the same ECRYPT_BLOCKLENGTH, etc.). 
+ */
+#define ECRYPT_MAXVARIANT 1                   /* [edit] */
+
+#ifndef ECRYPT_VARIANT
+#define ECRYPT_VARIANT 1
+#endif
+
+#if (ECRYPT_VARIANT > ECRYPT_MAXVARIANT)
+#error this variant does not exist
+#endif
+
+/* ------------------------------------------------------------------------- */
+
+#endif