initial commit

1 files changed, 40 insertions, 0 deletions

diff --git a/code/crypto/test/ed25519_sign.c b/code/crypto/test/ed25519_sign.c
new file mode 100644
index 0000000..da098bd
--- /dev/null
+++ b/code/crypto/test/ed25519_sign.c
@@ -0,0 +1,40 @@
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <curve25519.h>
+
+#define KEY_LEN     32
+#define SIG_LEN     64
+
+static int v_rng(void *buf, size_t bufsize) {
+    int fd;
+    
+    if((fd = open("/dev/urandom", O_RDONLY)) < 0) return -1;
+    size_t nb = read(fd, buf, bufsize);
+    close(fd);
+    if (nb != bufsize) return -1;
+    return 0;
+}
+
+int main(int argc, char *argv[]) {
+    unsigned char msg[1024];
+    size_t msg_len;
+    unsigned char public[KEY_LEN];
+    unsigned char private[KEY_LEN * 2];
+    unsigned char signature[SIG_LEN];
+
+    strcpy((char *)msg, "PERA JE CAR!");
+    msg_len = strlen((char *)msg) + 1;
+    
+    ED25519_keypair(public, private, v_rng);
+    ED25519_sign(signature, msg, msg_len, private);
+
+    unlink("msg.sig");
+    int fd = open("msg.sig", O_WRONLY | O_CREAT);
+    write(fd, public, KEY_LEN);
+    write(fd, signature, SIG_LEN);
+    close(fd);
+}
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