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Change lengths/sums to unsigned variables. #22

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Change lengths/sums to unsigned variables. #22

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3c7b8f9
Update wots.c
rubeecube Oct 2, 2023
9836c17
Update wots.c
rubeecube Oct 2, 2023
f00a689
Update wots.c
rubeecube Oct 2, 2023
4df74c4
Merge pull request #3 from rubeecube/patch-2
rubeecube Oct 2, 2023
873acad
Merge pull request #1 from rubeecube/patch-3
rubeecube Oct 2, 2023
b4fea9b
Merge pull request #2 from rubeecube/patch-1
rubeecube Oct 2, 2023
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10 changes: 5 additions & 5 deletions wots.c
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Original file line number Diff line number Diff line change
Expand Up @@ -80,9 +80,9 @@ static void base_w(const xmss_params *params,

/* Computes the WOTS+ checksum over a message (in base_w). */
static void wots_checksum(const xmss_params *params,
int *csum_base_w, const int *msg_base_w)
int *csum_base_w, const unsigned int *msg_base_w)
{
int csum = 0;
unsigned long long csum = 0;
unsigned char csum_bytes[(params->wots_len2 * params->wots_log_w + 7) / 8];
unsigned int i;

Expand All @@ -100,7 +100,7 @@ static void wots_checksum(const xmss_params *params,

/* Takes a message and derives the matching chain lengths. */
static void chain_lengths(const xmss_params *params,
int *lengths, const unsigned char *msg)
unsigned int *lengths, const unsigned char *msg)
{
base_w(params, lengths, params->wots_len1, msg);
wots_checksum(params, lengths + params->wots_len1, lengths);
Expand Down Expand Up @@ -139,7 +139,7 @@ void wots_sign(const xmss_params *params,
const unsigned char *seed, const unsigned char *pub_seed,
uint32_t addr[8])
{
int lengths[params->wots_len];
unsigned int lengths[params->wots_len];
uint32_t i;

chain_lengths(params, lengths, msg);
Expand All @@ -163,7 +163,7 @@ void wots_pk_from_sig(const xmss_params *params, unsigned char *pk,
const unsigned char *sig, const unsigned char *msg,
const unsigned char *pub_seed, uint32_t addr[8])
{
int lengths[params->wots_len];
unsigned int lengths[params->wots_len];
uint32_t i;

chain_lengths(params, lengths, msg);
Expand Down