34 lines
1 KiB
C
34 lines
1 KiB
C
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/* Copyright 2015-2016 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. */
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#include <errno.h>
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#include <resolv.h>
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#include <stdio.h>
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#include "curve25519.h"
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#include "base64.h"
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int pubkey_main(__attribute__((unused)) int argc, __attribute__((unused)) char *argv[])
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{
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unsigned char private_key[CURVE25519_POINT_SIZE + 1] = { 0 }, public_key[CURVE25519_POINT_SIZE] = { 0 };
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char private_key_base64[b64_len(CURVE25519_POINT_SIZE)] = { 0 }, public_key_base64[b64_len(CURVE25519_POINT_SIZE)] = { 0 };
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if (fread(private_key_base64, 1, sizeof(private_key_base64) - 1, stdin) != sizeof(private_key_base64) - 1) {
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errno = EINVAL;
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perror("fread(private key)");
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return 1;
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}
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if (b64_pton(private_key_base64, private_key, sizeof(private_key)) < 0) {
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errno = EINVAL;
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perror("b64");
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return 1;
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}
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curve25519_generate_public(public_key, private_key);
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if (b64_ntop(public_key, sizeof(public_key), public_key_base64, sizeof(public_key_base64)) < 0) {
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errno = EINVAL;
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perror("b64");
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return 1;
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}
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puts(public_key_base64);
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return 0;
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}
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