diff options
Diffstat (limited to 'src/tools/pubkey.c')
-rw-r--r-- | src/tools/pubkey.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/tools/pubkey.c b/src/tools/pubkey.c new file mode 100644 index 0000000..d9a97d9 --- /dev/null +++ b/src/tools/pubkey.c @@ -0,0 +1,33 @@ +/* Copyright 2015-2016 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. */ + +#include <errno.h> +#include <resolv.h> +#include <stdio.h> + +#include "curve25519.h" +#include "base64.h" + +int pubkey_main(__attribute__((unused)) int argc, __attribute__((unused)) char *argv[]) +{ + unsigned char private_key[CURVE25519_POINT_SIZE + 1] = { 0 }, public_key[CURVE25519_POINT_SIZE] = { 0 }; + char private_key_base64[b64_len(CURVE25519_POINT_SIZE)] = { 0 }, public_key_base64[b64_len(CURVE25519_POINT_SIZE)] = { 0 }; + + if (fread(private_key_base64, 1, sizeof(private_key_base64) - 1, stdin) != sizeof(private_key_base64) - 1) { + errno = EINVAL; + perror("fread(private key)"); + return 1; + } + if (b64_pton(private_key_base64, private_key, sizeof(private_key)) < 0) { + errno = EINVAL; + perror("b64"); + return 1; + } + curve25519_generate_public(public_key, private_key); + if (b64_ntop(public_key, sizeof(public_key), public_key_base64, sizeof(public_key_base64)) < 0) { + errno = EINVAL; + perror("b64"); + return 1; + } + puts(public_key_base64); + return 0; +} |