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LMS: fix for when WOLFSSL_LMS_MAX_LEVELS is 1

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This commit is contained in:
Sean Parkinson
2025-04-17 11:19:41 +10:00
parent bfab68f40c
commit 62f28759d8
1 changed files with 6 additions and 0 deletions
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6
wolfcrypt/src/wc_lms_impl.c
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@ -3476,7 +3476,9 @@ static int wc_hss_sign_build_sig(LmsState* state, byte* priv_raw,
/* Build from bottom up. */ /* Build from bottom up. */
for (i = params->levels - 1; (ret == 0) && (i >= 0); i--) { for (i = params->levels - 1; (ret == 0) && (i >= 0); i--) {
byte* p = priv + i * (LMS_Q_LEN + params->hash_len + LMS_I_LEN); byte* p = priv + i * (LMS_Q_LEN + params->hash_len + LMS_I_LEN);
#if !defined(WOLFSSL_LMS_MAX_LEVELS) || WOLFSSL_LMS_MAX_LEVELS > 1
byte* root = NULL; byte* root = NULL;
#endif
#ifndef WOLFSSL_LMS_NO_SIG_CACHE #ifndef WOLFSSL_LMS_NO_SIG_CACHE
int store_p = 0; int store_p = 0;
word32 q_32 = LMS_Q_AT_LEVEL(q, params->levels, i, word32 q_32 = LMS_Q_AT_LEVEL(q, params->levels, i,
@ -3487,10 +3489,12 @@ static int wc_hss_sign_build_sig(LmsState* state, byte* priv_raw,
/* Move to start of next signature at this level. */ /* Move to start of next signature at this level. */
sig -= LMS_SIG_LEN(params->height, params->p, params->hash_len); sig -= LMS_SIG_LEN(params->height, params->p, params->hash_len);
#if !defined(WOLFSSL_LMS_MAX_LEVELS) || WOLFSSL_LMS_MAX_LEVELS > 1
if (i != 0) { if (i != 0) {
/* Put root node into signature at this index. */ /* Put root node into signature at this index. */
root = sig - params->hash_len; root = sig - params->hash_len;
} }
#endif
#ifndef WOLFSSL_LMS_NO_SIG_CACHE #ifndef WOLFSSL_LMS_NO_SIG_CACHE
/* Check if we have a cached version of C and the p hashes that we /* Check if we have a cached version of C and the p hashes that we
@ -3526,10 +3530,12 @@ static int wc_hss_sign_build_sig(LmsState* state, byte* priv_raw,
/* Copy the authentication path out of the private key. */ /* Copy the authentication path out of the private key. */
XMEMCPY(s, priv_key->state[i].auth_path, XMEMCPY(s, priv_key->state[i].auth_path,
params->height * params->hash_len); params->height * params->hash_len);
#if !defined(WOLFSSL_LMS_MAX_LEVELS) || WOLFSSL_LMS_MAX_LEVELS > 1
/* Copy the root node into signature unless at top. */ /* Copy the root node into signature unless at top. */
if (i != 0) { if (i != 0) {
XMEMCPY(root, priv_key->state[i].root, params->hash_len); XMEMCPY(root, priv_key->state[i].root, params->hash_len);
} }
#endif
} }
if ((ret == 0) && (i != 0)) { if ((ret == 0) && (i != 0)) {
/* Create public data for this level if there is another. */ /* Create public data for this level if there is another. */