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https://github.com/cryb-to/cryb-to.git
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d017611d76
If the key length is not a multiple of 40 bits, its base32 representation may be padded, and that padding will be encoded. We already decoded the label (which may contain spaces and other unsafe characters), but not the key. For the sake of simplicity and robustness, we now decode the name and value of every property. This corresponds to OpenPAM r886.
95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
/*-
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* Copyright (c) 2013 The University of Oslo
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "cryb/impl.h"
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#include <sys/types.h>
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#include <inttypes.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <cryb/rfc4648.h>
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#include <cryb/strlcmp.h>
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#include <cryb/oath.h>
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char *
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oath_key_to_uri(const struct oath_key *key)
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{
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const char *hash;
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char *tmp, *uri;
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size_t kslen, urilen;
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switch (key->hash) {
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case oh_sha1:
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hash = "SHA1";
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break;
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case oh_sha256:
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hash = "SHA256";
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break;
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case oh_sha512:
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hash = "SHA512";
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break;
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case oh_md5:
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hash = "MD5";
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break;
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default:
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return (NULL);
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}
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/* XXX the label and secret should be URI-encoded */
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if (key->mode == om_hotp) {
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urilen = asprintf(&uri, "otpauth://%s/%s?"
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"algorithm=%s&digits=%d&counter=%ju&secret=",
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"hotp", key->label, hash, key->digits,
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(uintmax_t)key->counter);
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} else if (key->mode == om_totp) {
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urilen = asprintf(&uri, "otpauth://%s/%s?"
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"algorithm=%s&digits=%d&period=%u&lastused=%ju&secret=",
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"totp", key->label, hash, key->digits, key->timestep,
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(uintmax_t)key->lastused);
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} else {
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/* unreachable */
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return (NULL);
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}
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/* compute length of base32-encoded key and append it */
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kslen = base32_enclen(key->keylen) + 1;
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if ((tmp = realloc(uri, urilen + kslen)) == NULL) {
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free(uri);
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return (NULL);
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}
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uri = tmp;
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if (base32_encode(key->key, key->keylen, uri + urilen, &kslen) != 0) {
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free(uri);
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return (NULL);
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}
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return (uri);
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}
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