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/* See LICENSE file for copyright and license details. */
#include "common.h"
static size_t
encode_params(char *buf, size_t bufsize, const struct libar2_argon2_parameters *params)
{
if (params->salt) {
return libar2_encode_params(buf, params);
}
return 1 + (size_t)snprintf(buf, bufsize, "$%s$v=%i$m=%lu,t=%lu,p=%lu$*%zu$",
libar2_type_to_string(params->type, LIBAR2_LOWER_CASE),
(int)params->version,
(unsigned long int)params->m_cost,
(unsigned long int)params->t_cost,
(unsigned long int)params->lanes,
params->saltlen);
}
char *
libar2simplified_encode(const struct libar2_argon2_parameters *params_, void *hash)
{
struct libar2_argon2_parameters params = *params_;
size_t size, off;
char *ret;
if (libar2_validate_params(¶ms, NULL) != LIBAR2_OK) {
errno = EINVAL;
return NULL;
}
size = encode_params(NULL, 0, ¶ms);
if (hash)
size += libar2_encode_base64(NULL, NULL, params.hashlen) - 1;
else
size += (size_t)snprintf(NULL, 0, "*%zu", params.hashlen);
ret = malloc(size);
if (!ret) {
errno = ENOMEM;
return NULL;
}
off = encode_params(ret, size, ¶ms) - 1;
if (off > size - 1)
abort();
if (hash)
off += libar2_encode_base64(&ret[off], hash, params.hashlen) - 1;
else
off += (size_t)sprintf(&ret[off], "*%zu", params.hashlen);
if (off > size - 1)
abort();
return ret;
}
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