| // SPDX-License-Identifier: GPL-2.0 OR MIT |
| /* |
| * Copyright (C) 2015-2020 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. |
| */ |
| |
| #include <errno.h> |
| #include <stdio.h> |
| |
| #include "curve25519.h" |
| #include "encoding.h" |
| #include "subcommands.h" |
| #include "ctype.h" |
| |
| int pubkey_main(int argc, const char *argv[]) |
| { |
| uint8_t key[WG_KEY_LEN] __attribute__((aligned(sizeof(uintptr_t)))); |
| char base64[WG_KEY_LEN_BASE64]; |
| int trailing_char; |
| |
| if (argc != 1) { |
| fprintf(stderr, "Usage: %s %s\n", PROG_NAME, argv[0]); |
| return 1; |
| } |
| |
| if (fread(base64, 1, sizeof(base64) - 1, stdin) != sizeof(base64) - 1) { |
| errno = EINVAL; |
| fprintf(stderr, "%s: Key is not the correct length or format\n", PROG_NAME); |
| return 1; |
| } |
| base64[WG_KEY_LEN_BASE64 - 1] = '\0'; |
| |
| for (;;) { |
| trailing_char = getc(stdin); |
| if (!trailing_char || char_is_space(trailing_char)) |
| continue; |
| if (trailing_char == EOF) |
| break; |
| fprintf(stderr, "%s: Trailing characters found after key\n", PROG_NAME); |
| return 1; |
| } |
| |
| if (!key_from_base64(key, base64)) { |
| fprintf(stderr, "%s: Key is not the correct length or format\n", PROG_NAME); |
| return 1; |
| } |
| curve25519_generate_public(key, key); |
| key_to_base64(base64, key); |
| puts(base64); |
| return 0; |
| } |