First commit, Vystem v0.1

Blastproof/keygen/api.h

@@ -0,0 +1,77 @@
+#ifndef SPX_API_H
+#define SPX_API_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "params.h"
+
+#define CRYPTO_ALGNAME "SPHINCS+"
+
+#define CRYPTO_SECRETKEYBYTES SPX_SK_BYTES
+#define CRYPTO_PUBLICKEYBYTES SPX_PK_BYTES
+#define CRYPTO_BYTES SPX_BYTES
+#define CRYPTO_SEEDBYTES 3*SPX_N
+
+/*
+ * Returns the length of a secret key, in bytes
+ */
+unsigned long long crypto_sign_secretkeybytes(void);
+
+/*
+ * Returns the length of a public key, in bytes
+ */
+unsigned long long crypto_sign_publickeybytes(void);
+
+/*
+ * Returns the length of a signature, in bytes
+ */
+unsigned long long crypto_sign_bytes(void);
+
+/*
+ * Returns the length of the seed required to generate a key pair, in bytes
+ */
+unsigned long long crypto_sign_seedbytes(void);
+
+/*
+ * Generates a SPHINCS+ key pair given a seed.
+ * Format sk: [SK_SEED || SK_PRF || PUB_SEED || root]
+ * Format pk: [root || PUB_SEED]
+ */
+int crypto_sign_seed_keypair(unsigned char *pk, unsigned char *sk,
+                             const unsigned char *seed);
+
+/*
+ * Generates a SPHINCS+ key pair.
+ * Format sk: [SK_SEED || SK_PRF || PUB_SEED || root]
+ * Format pk: [root || PUB_SEED]
+ */
+int crypto_sign_keypair(unsigned char *pk, unsigned char *sk);
+
+/**
+ * Returns an array containing a detached signature.
+ */
+int crypto_sign_signature(uint8_t *sig, size_t *siglen,
+                          const uint8_t *m, size_t mlen, const uint8_t *sk);
+
+/**
+ * Verifies a detached signature and message under a given public key.
+ */
+int crypto_sign_verify(const uint8_t *sig, size_t siglen,
+                       const uint8_t *m, size_t mlen, const uint8_t *pk);
+
+/**
+ * Returns an array containing the signature followed by the message.
+ */
+int crypto_sign(unsigned char *sm, unsigned long long *smlen,
+                const unsigned char *m, unsigned long long mlen,
+                const unsigned char *sk);
+
+/**
+ * Verifies a given signature-message pair under a given public key.
+ */
+int crypto_sign_open(unsigned char *m, unsigned long long *mlen,
+                     const unsigned char *sm, unsigned long long smlen,
+                     const unsigned char *pk);
+
+#endif