48 lines
1.1 KiB
C
48 lines
1.1 KiB
C
/* Copyright (C) 2015-2017 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. */
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#include <errno.h>
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#include <stdio.h>
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#include <ctype.h>
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#include "curve25519.h"
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#include "encoding.h"
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#include "subcommands.h"
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int pubkey_main(int argc, char *argv[])
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{
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uint8_t key[WG_KEY_LEN];
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char base64[WG_KEY_LEN_BASE64];
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int trailing_char;
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if (argc != 1) {
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fprintf(stderr, "Usage: %s %s\n", PROG_NAME, argv[0]);
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return 1;
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}
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if (fread(base64, 1, sizeof(base64) - 1, stdin) != sizeof(base64) - 1) {
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errno = EINVAL;
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fprintf(stderr, "%s: Key is not the correct length or format\n", PROG_NAME);
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return 1;
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}
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base64[WG_KEY_LEN_BASE64 - 1] = '\0';
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for (;;) {
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trailing_char = getc(stdin);
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if (!trailing_char || isspace(trailing_char) || isblank(trailing_char))
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continue;
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if (trailing_char == EOF)
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break;
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fprintf(stderr, "%s: Trailing characters found after key\n", PROG_NAME);
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return 1;
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}
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if (!key_from_base64(key, base64)) {
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fprintf(stderr, "%s: Key is not the correct length or format\n", PROG_NAME);
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return 1;
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}
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curve25519_generate_public(key, key);
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key_to_base64(base64, key);
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puts(base64);
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return 0;
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}
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