102 Zeilen
2.8 KiB
C
102 Zeilen
2.8 KiB
C
#include <stdint.h>
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#include "params_runtime.h"
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#include "xmss_core.h"
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/* This file provides wrapper functions that take keys that include OIDs to
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identify the parameter set to be used. After setting the parameters accordingly
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it falls back to the regular XMSS core functions. */
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int xmss_keypair(unsigned char *pk, unsigned char *sk, const uint32_t oid)
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{
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unsigned int i;
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if (xmss_parse_oid(oid)) {
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return 1;
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}
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for (i = 0; i < XMSS_OID_LEN; i++) {
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pk[i] = (oid >> (8 * i)) & 0xFF;
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/* For an implementation that uses runtime parameters, it is crucial
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that the OID is part of the secret key as well. */
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sk[i] = (oid >> (8 * i)) & 0xFF;
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}
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return xmss_core_keypair(pk + XMSS_OID_LEN, sk + XMSS_OID_LEN);
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}
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int xmss_sign(unsigned char *sk,
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unsigned char *sm, unsigned long long *smlen,
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const unsigned char *m, unsigned long long mlen)
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{
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uint32_t oid = 0;
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unsigned int i;
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for (i = 0; i < XMSS_OID_LEN; i++) {
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oid |= sk[i] << (i * 8);
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}
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if (xmss_parse_oid(oid)) {
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return 1;
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}
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return xmss_core_sign(sk + XMSS_OID_LEN, sm, smlen, m, mlen);
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}
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int xmss_sign_open(unsigned char *m, unsigned long long *mlen,
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const unsigned char *sm, unsigned long long smlen,
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const unsigned char *pk)
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{
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uint32_t oid = 0;
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unsigned int i;
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for (i = 0; i < XMSS_OID_LEN; i++) {
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oid |= pk[i] << (i * 8);
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}
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if (xmss_parse_oid(oid)) {
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return 1;
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}
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return xmss_core_sign_open(m, mlen, sm, smlen, pk + XMSS_OID_LEN);
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}
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int xmssmt_keypair(unsigned char *pk, unsigned char *sk, const uint32_t oid)
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{
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unsigned int i;
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if (xmssmt_parse_oid(oid)) {
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return 1;
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}
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for (i = 0; i < XMSS_OID_LEN; i++) {
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pk[i] = (oid >> (8 * i)) & 0xFF;
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sk[i] = (oid >> (8 * i)) & 0xFF;
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}
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return xmssmt_core_keypair(pk + XMSS_OID_LEN, sk + XMSS_OID_LEN);
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}
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int xmssmt_sign(unsigned char *sk,
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unsigned char *sm, unsigned long long *smlen,
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const unsigned char *m, unsigned long long mlen)
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{
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uint32_t oid = 0;
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unsigned int i;
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for (i = 0; i < XMSS_OID_LEN; i++) {
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oid |= sk[i] << (i * 8);
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}
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if (xmssmt_parse_oid(oid)) {
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return 1;
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}
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return xmssmt_core_sign(sk + XMSS_OID_LEN, sm, smlen, m, mlen);
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}
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int xmssmt_sign_open(unsigned char *m, unsigned long long *mlen,
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const unsigned char *sm, unsigned long long smlen,
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const unsigned char *pk)
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{
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uint32_t oid = 0;
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unsigned int i;
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for (i = 0; i < XMSS_OID_LEN; i++) {
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oid |= pk[i] << (i * 8);
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}
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if (xmssmt_parse_oid(oid)) {
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return 1;
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}
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return xmssmt_core_sign_open(m, mlen, sm, smlen, pk + XMSS_OID_LEN);
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}
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