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Deduplicate XMSS/XMSSMT key generation

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Joost Rijneveld 2017-10-24 12:02:42 +02:00
parent d9a9723125
commit d794ae30ee
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1 changed files with 4 additions and 19 deletions
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23
xmss_core.c
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@ -91,25 +91,10 @@ static void treehash(const xmss_params *params,
int xmss_core_keypair(const xmss_params *params,
unsigned char *pk, unsigned char *sk)
{
/* We do not need the auth path in key generation, but it simplifies the
code to have just one treehash routine that computes both root and path
in one function. */
unsigned char auth_path[params->tree_height * params->n];
uint32_t top_tree_addr[8] = {0};
/* Initialize index to 0. */
memset(sk, 0, params->index_len);
sk += 4;
/* Initialize SK_SEED, SK_PRF and PUB_SEED. */
randombytes(sk, 3 * params->n);
memcpy(pk + params->n, sk + 2*params->n, params->n);
/* Compute root node. */
treehash(params, pk, auth_path, sk, pk + params->n, 0, top_tree_addr);
memcpy(sk + 3*params->n, pk, params->n);
return 0;
/* The key generation procedure of XMSS and XMSSMT is exactly the same.
The only important detail is that the right subtree must be selected;
this requires us to correctly set the d=1 parameter for XMSS. */
return xmssmt_core_keypair(params, pk, sk);
}
/**