MODULE = CryptX PACKAGE = Crypt::PK::ECC
PROTOTYPES: DISABLE
Crypt::PK::ECC
_new(Class)
CODE:
{
int rv;
Newz(0, RETVAL, 1, struct ecc_struct);
if (!RETVAL) croak("FATAL: Newz failed");
RETVAL->pindex = find_prng("chacha20");
RETVAL->last_pid = (IV)PerlProc_getpid();
RETVAL->key.type = -1;
if (RETVAL->pindex == -1) {
zeromem(RETVAL, sizeof(*RETVAL));
Safefree(RETVAL);
croak("FATAL: find_prng('chacha20') failed");
}
rv = rng_make_prng(320, RETVAL->pindex, &RETVAL->pstate, NULL); /* 320bits = 40bytes */
if (rv != CRYPT_OK) {
zeromem(RETVAL, sizeof(*RETVAL));
Safefree(RETVAL);
croak("FATAL: rng_make_prng failed: %s", error_to_string(rv));
}
}
OUTPUT:
RETVAL
void
generate_key(Crypt::PK::ECC self, SV *curve)
PPCODE:
{
int rv;
cryptx_internal_pk_prng_reseed(&self->pstate, self->pindex, &self->last_pid);
/* setup dp structure */
rv = cryptx_internal_ecc_set_curve_from_SV(&self->key, curve); /* croaks on error */
if (rv != CRYPT_OK) croak("FATAL: ecc_set_curve failed: %s", error_to_string(rv));
/* gen the key */
rv = ecc_generate_key(&self->pstate, self->pindex, &self->key);
if (rv != CRYPT_OK) croak("FATAL: ecc_generate_key failed: %s", error_to_string(rv));
XPUSHs(ST(0)); /* return self */
}
void
_import(Crypt::PK::ECC self, SV * key_data)
PPCODE:
{
int rv;
unsigned char *data=NULL;
STRLEN data_len=0;
data = (unsigned char *)SvPVbyte(key_data, data_len);
if (self->key.type != -1) { ecc_free(&self->key); self->key.type = -1; }
rv = ecc_import_openssl(data, (unsigned long)data_len, &self->key);
if (rv != CRYPT_OK) croak("FATAL: ecc_import_openssl failed: %s", error_to_string(rv));
XPUSHs(ST(0)); /* return self */
}
void
_import_old(Crypt::PK::ECC self, SV * key_data)
PPCODE:
{
int rv;
unsigned char *data=NULL;
STRLEN data_len=0;
data = (unsigned char *)SvPVbyte(key_data, data_len);
if (self->key.type != -1) { ecc_free(&self->key); self->key.type = -1; }
rv = ecc_import(data, (unsigned long)data_len, &self->key);
if (rv != CRYPT_OK) croak("FATAL: ecc_import failed: %s", error_to_string(rv));
XPUSHs(ST(0)); /* return self */
}
void
_import_pkcs8(Crypt::PK::ECC self, SV * key_data, SV * passwd)
PPCODE:
{
int rv;
unsigned char *data = NULL;
STRLEN data_len = 0;
password_ctx pw_ctx = { cryptx_internal_password_cb_getpw, cryptx_internal_password_cb_free, passwd };
data = (unsigned char *)SvPVbyte(key_data, data_len);
if (self->key.type != -1) { ecc_free(&self->key); self->key.type = -1; }
if (SvOK(passwd)) {
rv = ecc_import_pkcs8(data, (unsigned long)data_len, &pw_ctx, &self->key);
}
else {
rv = ecc_import_pkcs8(data, (unsigned long)data_len, NULL, &self->key);
}
if (rv != CRYPT_OK) croak("FATAL: ecc_import_pkcs8 failed: %s", error_to_string(rv));
XPUSHs(ST(0)); /* return self */
}
void
_import_pem(Crypt::PK::ECC self, SV * key_data, SV * passwd)
PPCODE:
{
int rv;
unsigned char *data = NULL;
STRLEN data_len = 0;
password_ctx pw_ctx = { cryptx_internal_password_cb_getpw, cryptx_internal_password_cb_free, passwd };
ltc_pka_key key_from_pem;
data = (unsigned char *)SvPVbyte(key_data, data_len);
if (self->key.type != -1) { ecc_free(&self->key); self->key.type = -1; }
if (SvOK(passwd)) {
rv = pem_decode_pkcs(data, (unsigned long)data_len, &key_from_pem, &pw_ctx);
}
else {
rv = pem_decode_pkcs(data, (unsigned long)data_len, &key_from_pem, NULL);
}
if (rv != CRYPT_OK) croak("FATAL: pem_decode_pkcs failed: %s", error_to_string(rv));
if (key_from_pem.id != LTC_PKA_EC) {
pka_key_free(&key_from_pem);
croak("FATAL: pem_decode_pkcs decoded non-ECC key");
}
self->key = key_from_pem.u.ecc;
XPUSHs(ST(0)); /* return self */
}
void
_import_openssh(Crypt::PK::ECC self, SV * key_data, SV * passwd)
PPCODE:
{
int rv;
unsigned char *data = NULL;
STRLEN data_len = 0;
password_ctx pw_ctx = { cryptx_internal_password_cb_getpw, cryptx_internal_password_cb_free, passwd };
ltc_pka_key key_from_pem;
data = (unsigned char *)SvPVbyte(key_data, data_len);
if (self->key.type != -1) { ecc_free(&self->key); self->key.type = -1; }
if (SvOK(passwd)) {
rv = pem_decode_openssh(data, (unsigned long)data_len, &key_from_pem, &pw_ctx);
}
else {
rv = pem_decode_openssh(data, (unsigned long)data_len, &key_from_pem, NULL);
}
if (rv != CRYPT_OK) croak("FATAL: pem_decode_openssh failed: %s", error_to_string(rv));
if (key_from_pem.id != LTC_PKA_EC) {
pka_key_free(&key_from_pem);
croak("FATAL: pem_decode_openssh decoded non-ECC key");
}
self->key = key_from_pem.u.ecc;
XPUSHs(ST(0)); /* return self */
}
void
_import_x509(Crypt::PK::ECC self, SV * key_data)
PPCODE:
{
int rv;
unsigned char *data=NULL;
STRLEN data_len=0;
data = (unsigned char *)SvPVbyte(key_data, data_len);
if (self->key.type != -1) { ecc_free(&self->key); self->key.type = -1; }
rv = ecc_import_x509(data, (unsigned long)data_len, &self->key);
if (rv != CRYPT_OK) croak("FATAL: ecc_import_x509 failed: %s", error_to_string(rv));
XPUSHs(ST(0)); /* return self */
}
void
import_key_raw(Crypt::PK::ECC self, SV * key_data, SV * curve)
PPCODE:
{
int rv, type;
unsigned char *data=NULL;
STRLEN data_len=0;
data = (unsigned char *)SvPVbyte(key_data, data_len);
if (self->key.type != -1) { ecc_free(&self->key); self->key.type = -1; }
/* setup dp structure */
rv = cryptx_internal_ecc_set_curve_from_SV(&self->key, curve); /* croaks on error */
if (rv != CRYPT_OK) croak("FATAL: ecc_set_curve failed: %s", error_to_string(rv));
/* import key */
type = (data_len == (STRLEN)ecc_get_size(&self->key)) ? PK_PRIVATE : PK_PUBLIC;
rv = ecc_set_key(data, (unsigned long)data_len, type, &self->key);
if (rv != CRYPT_OK) croak("FATAL: ecc_set_key failed: %s", error_to_string(rv));
XPUSHs(ST(0)); /* return self */
}
int
is_private(Crypt::PK::ECC self)
CODE:
if (self->key.type == -1) XSRETURN_UNDEF;
RETVAL = (self->key.type == PK_PRIVATE) ? 1 : 0;
OUTPUT:
RETVAL
int
size(Crypt::PK::ECC self)
CODE:
if (self->key.type == -1) XSRETURN_UNDEF;
RETVAL = ecc_get_size(&self->key);
OUTPUT:
RETVAL
SV*
key2hash(Crypt::PK::ECC self)
PREINIT:
HV *rv_hash;
size_t siz;
long esize;
char buf[20001];
SV **not_used;
CODE:
if (self->key.type == -1) XSRETURN_UNDEF;
esize = ecc_get_size(&self->key);
rv_hash = newHV();
/* k */
siz = (self->key.k) ? mp_ubin_size(self->key.k) : 0;
if (siz>10000) {
zeromem(buf, sizeof(buf));
croak("FATAL: key2hash failed - 'k' too big number");
}
if (siz>0) {
cryptx_internal_mp2hex_with_leading_zero(self->key.k, buf, 20000, esize*2);
not_used = hv_store(rv_hash, "k", 1, newSVpv(buf, strlen(buf)), 0);
}
else{
not_used = hv_store(rv_hash, "k", 1, newSVpv("", 0), 0);
}
/* pub_x */
siz = (self->key.pubkey.x) ? mp_ubin_size(self->key.pubkey.x) : 0;
if (siz>10000) {
zeromem(buf, sizeof(buf));
croak("FATAL: key2hash failed - 'pub_x' too big number");
}
if (siz>0) {
cryptx_internal_mp2hex_with_leading_zero(self->key.pubkey.x, buf, 20000, esize*2);
not_used = hv_store(rv_hash, "pub_x", 5, newSVpv(buf, strlen(buf)), 0);
}
else{
not_used = hv_store(rv_hash, "pub_x", 5, newSVpv("", 0), 0);
}
/* pub_y */
siz = (self->key.pubkey.y) ? mp_ubin_size(self->key.pubkey.y) : 0;
if (siz>10000) {
zeromem(buf, sizeof(buf));
croak("FATAL: key2hash failed - 'pub_y' too big number");
}
if (siz>0) {
cryptx_internal_mp2hex_with_leading_zero(self->key.pubkey.y, buf, 20000, esize*2);
not_used = hv_store(rv_hash, "pub_y", 5, newSVpv(buf, strlen(buf)), 0);
}
else{
not_used = hv_store(rv_hash, "pub_y", 5, newSVpv("", 0), 0);
}
/* curve_... */
{
not_used = hv_store(rv_hash, "curve_cofactor", 14, newSViv(self->key.dp.cofactor), 0);
cryptx_internal_mp2hex_with_leading_zero(self->key.dp.prime, buf, 20000, 0);
not_used = hv_store(rv_hash, "curve_prime", 11, newSVpv(buf, strlen(buf)), 0);
cryptx_internal_mp2hex_with_leading_zero(self->key.dp.A, buf, 20000, 0);
not_used = hv_store(rv_hash, "curve_A", 7, newSVpv(buf, strlen(buf)), 0);
cryptx_internal_mp2hex_with_leading_zero(self->key.dp.B, buf, 20000, 0);
not_used = hv_store(rv_hash, "curve_B", 7, newSVpv(buf, strlen(buf)), 0);
cryptx_internal_mp2hex_with_leading_zero(self->key.dp.order, buf, 20000, 0);
not_used = hv_store(rv_hash, "curve_order", 11, newSVpv(buf, strlen(buf)), 0);
cryptx_internal_mp2hex_with_leading_zero(self->key.dp.base.x, buf, 20000, 0);
not_used = hv_store(rv_hash, "curve_Gx", 8, newSVpv(buf, strlen(buf)), 0);
cryptx_internal_mp2hex_with_leading_zero(self->key.dp.base.y, buf, 20000, 0);
not_used = hv_store(rv_hash, "curve_Gy", 8, newSVpv(buf, strlen(buf)), 0);
not_used = hv_store(rv_hash, "curve_bytes", 11, newSViv(mp_ubin_size(self->key.dp.prime)), 0);
not_used = hv_store(rv_hash, "curve_bits", 10, newSViv(mp_count_bits(self->key.dp.prime)), 0);
if (self->key.dp.oidlen > 0) {
unsigned long i;
HV *h;
SV **pref, *cname;
char *cname_ptr, *oid_ptr;
STRLEN cname_len;
/* OID -> "curve_oid" */
SV *oid = newSVpv("", 0);
for(i = 0; i < self->key.dp.oidlen - 1; i++) sv_catpvf(oid, "%lu.", self->key.dp.oid[i]);
sv_catpvf(oid, "%lu", self->key.dp.oid[i]);
oid_ptr = SvPVX(oid);
not_used = hv_store(rv_hash, "curve_oid", 9, oid, 0);
/* curve name -> "curve_name" */
if ((h = get_hv("Crypt::PK::ECC::curve_oid2name", 0)) != NULL) {
pref = hv_fetch(h, oid_ptr, (U32)strlen(oid_ptr), 0);
if (pref) {
cname_ptr = SvPV(*pref, cname_len);
cname = newSVpv(cname_ptr, cname_len);
cname_ptr = SvPVX(cname);
not_used = hv_store(rv_hash, "curve_name", 10, cname, 0);
}
}
}
}
/* size */
not_used = hv_store(rv_hash, "size", 4, newSViv(esize), 0);
/* type */
not_used = hv_store(rv_hash, "type", 4, newSViv(self->key.type), 0);
LTC_UNUSED_PARAM(not_used);
zeromem(buf, sizeof(buf));
RETVAL = newRV_noinc((SV*)rv_hash);
OUTPUT:
RETVAL
SV *
export_key_der(Crypt::PK::ECC self, char * type)
CODE:
{
int rv;
unsigned char out[4096];
unsigned long int out_len = 4096;
if (self->key.type == -1) croak("FATAL: export_key_der no key");
if (strEQ(type, "private_short")) {
rv = ecc_export_openssl(out, &out_len, PK_PRIVATE|PK_CURVEOID, &self->key);
if (rv != CRYPT_OK) { zeromem(out, sizeof(out)); croak("FATAL: ecc_export_openssl(PK_PRIVATE|PK_CURVEOID) failed: %s", error_to_string(rv)); }
RETVAL = newSVpvn((char*)out, out_len);
}
else if (strEQ(type, "private_compressed")) {
rv = ecc_export_openssl(out, &out_len, PK_PRIVATE|PK_CURVEOID|PK_COMPRESSED, &self->key);
if (rv != CRYPT_OK) { zeromem(out, sizeof(out)); croak("FATAL: ecc_export_openssl(PK_PRIVATE|PK_CURVEOID|PK_COMPRESSED) failed: %s", error_to_string(rv)); }
RETVAL = newSVpvn((char*)out, out_len);
}
else if (strEQ(type, "private")) {
rv = ecc_export_openssl(out, &out_len, PK_PRIVATE, &self->key);
if (rv != CRYPT_OK) { zeromem(out, sizeof(out)); croak("FATAL: ecc_export_openssl(PK_PRIVATE) failed: %s", error_to_string(rv)); }
RETVAL = newSVpvn((char*)out, out_len);
}
else if (strEQ(type, "public_compressed")) {
rv = ecc_export_openssl(out, &out_len, PK_PUBLIC|PK_CURVEOID|PK_COMPRESSED, &self->key);
if (rv != CRYPT_OK) { zeromem(out, sizeof(out)); croak("FATAL: ecc_export_openssl(PK_PUBLIC|PK_CURVEOID|PK_COMPRESSED) failed: %s", error_to_string(rv)); }
RETVAL = newSVpvn((char*)out, out_len);
}
else if (strEQ(type, "public_short")) {
rv = ecc_export_openssl(out, &out_len, PK_PUBLIC|PK_CURVEOID, &self->key);
if (rv != CRYPT_OK) { zeromem(out, sizeof(out)); croak("FATAL: ecc_export_openssl(PK_PUBLIC|PK_CURVEOID) failed: %s", error_to_string(rv)); }
RETVAL = newSVpvn((char*)out, out_len);
}
else if (strEQ(type, "public")) {
rv = ecc_export_openssl(out, &out_len, PK_PUBLIC, &self->key);
if (rv != CRYPT_OK) { zeromem(out, sizeof(out)); croak("FATAL: ecc_export_openssl(PK_PUBLIC) failed: %s", error_to_string(rv)); }
RETVAL = newSVpvn((char*)out, out_len);
}
else {
croak("FATAL: export_key_der invalid type '%s'", type);
}
zeromem(out, sizeof(out));
}
OUTPUT:
RETVAL
SV *
export_key_raw(Crypt::PK::ECC self, char * type)
CODE:
{
int rv;
unsigned char out[4096];
unsigned long int out_len = sizeof(out);
if (self->key.type == -1) croak("FATAL: export_key_raw no key");
if (strEQ(type, "private")) {
rv = ecc_get_key(out, &out_len, PK_PRIVATE, &self->key);
if (rv != CRYPT_OK) { zeromem(out, sizeof(out)); croak("FATAL: ecc_get_key(private) failed: %s", error_to_string(rv)); }
RETVAL = newSVpvn((char*)out, out_len);
}
else if (strEQ(type, "public_compressed")) {
rv = ecc_get_key(out, &out_len, PK_PUBLIC|PK_COMPRESSED, &self->key);
if (rv != CRYPT_OK) { zeromem(out, sizeof(out)); croak("FATAL: ecc_get_key(public_compressed) failed: %s", error_to_string(rv)); }
RETVAL = newSVpvn((char*)out, out_len);
}
else if (strEQ(type, "public")) {
rv = ecc_get_key(out, &out_len, PK_PUBLIC, &self->key);
if (rv != CRYPT_OK) { zeromem(out, sizeof(out)); croak("FATAL: ecc_get_key(public) failed: %s", error_to_string(rv)); }
RETVAL = newSVpvn((char*)out, out_len);
}
else {
croak("FATAL: export_key_raw invalid type '%s'", type);
}
zeromem(out, sizeof(out));
}
OUTPUT:
RETVAL
SV *
encrypt(Crypt::PK::ECC self, SV * data, const char * hash_name = "SHA1")
CODE:
{
int rv, hash_id;
unsigned char *data_ptr=NULL;
STRLEN data_len=0;
unsigned char buffer[1024];
unsigned long buffer_len = 1024;
data_ptr = (unsigned char *)SvPVbyte(data, data_len);
cryptx_internal_pk_prng_reseed(&self->pstate, self->pindex, &self->last_pid);
hash_id = cryptx_internal_find_hash(hash_name);
if (hash_id == -1) croak("FATAL: find_hash failed for '%s'", hash_name);
rv = ecc_encrypt_key(data_ptr, (unsigned long)data_len, buffer, &buffer_len,
&self->pstate, self->pindex,
hash_id, &self->key);
if (rv != CRYPT_OK) { zeromem(buffer, sizeof(buffer)); croak("FATAL: ecc_encrypt_key failed: %s", error_to_string(rv)); }
RETVAL = newSVpvn((char*)buffer, buffer_len);
zeromem(buffer, sizeof(buffer));
}
OUTPUT:
RETVAL
SV *
decrypt(Crypt::PK::ECC self, SV * data)
CODE:
{
int rv;
unsigned char *data_ptr=NULL;
STRLEN data_len=0;
unsigned char buffer[1024];
unsigned long buffer_len = 1024;
data_ptr = (unsigned char *)SvPVbyte(data, data_len);
rv = ecc_decrypt_key(data_ptr, (unsigned long)data_len, buffer, &buffer_len, &self->key);
if (rv != CRYPT_OK) { zeromem(buffer, sizeof(buffer)); croak("FATAL: ecc_decrypt_key failed: %s", error_to_string(rv)); }
RETVAL = newSVpvn((char*)buffer, buffer_len);
zeromem(buffer, sizeof(buffer));
}
OUTPUT:
RETVAL
SV *
sign_hash(Crypt::PK::ECC self, SV * data, const char * hash_name = NULL, const char * hash_rfc6979_name = NULL)
ALIAS:
sign_hash_rfc7518 = 3
sign_message = 1
sign_message_rfc7518 = 2
sign_hash_eth = 4
CODE:
{
int rv, id, hash_rfc6979_id;
unsigned char buffer[1024], tmp[MAXBLOCKSIZE], *data_ptr = NULL;
unsigned long tmp_len = MAXBLOCKSIZE, buffer_len = 1024;
STRLEN data_len = 0;
ltc_ecc_sig_opts sig_opts;
sig_opts.type = LTC_ECCSIG_ANSIX962;
sig_opts.prng = &self->pstate;
sig_opts.wprng = self->pindex;
sig_opts.enable_recovery_id = 0;
sig_opts.recovery_id = -1;
sig_opts.rfc6979_hash_alg = NULL;
/* Handle dual signature modes for backward compatibility: if only 2 params passed, treat second as RFC6979 hash */
if ((ix == 0 || ix == 3 || ix == 4) && hash_name != NULL && hash_rfc6979_name == NULL) {
hash_rfc6979_name = hash_name;
}
data_ptr = (unsigned char *)SvPVbyte(data, data_len);
cryptx_internal_pk_prng_reseed(&self->pstate, self->pindex, &self->last_pid);
if (ix == 1 || ix == 2) {
/* for backward compatibility, if hash_name is NULL, use SHA1 */
if (hash_name == NULL) {
hash_name = "SHA1";
}
id = cryptx_internal_find_hash(hash_name);
if (id == -1) croak("FATAL: find_hash failed for '%s'", hash_name);
rv = hash_memory(id, data_ptr, (unsigned long)data_len, tmp, &tmp_len);
if (rv != CRYPT_OK) { zeromem(tmp, sizeof(tmp)); croak("FATAL: hash_memory failed: %s", error_to_string(rv)); }
data_ptr = tmp;
data_len = tmp_len;
}
if (hash_rfc6979_name != NULL) {
/* deterministic signing */
hash_rfc6979_id = cryptx_internal_find_hash(hash_rfc6979_name);
if (hash_rfc6979_id == -1) croak("FATAL: find_hash failed for rfc6979 hash '%s'", hash_rfc6979_name);
sig_opts.rfc6979_hash_alg = hash_descriptor[hash_rfc6979_id].name;
}
if (ix == 2 || ix == 3) {
/* rfc7518 */
sig_opts.type = LTC_ECCSIG_RFC7518;
}
else if (ix == 4) {
/* eth27 */
sig_opts.type = LTC_ECCSIG_ETH27;
}
else {
/* default */
sig_opts.type = LTC_ECCSIG_ANSIX962;
}
rv = ecc_sign_hash_v2(data_ptr, (unsigned long)data_len, buffer, &buffer_len, &sig_opts, &self->key);
if (rv != CRYPT_OK) {
zeromem(buffer, sizeof(buffer));
zeromem(tmp, sizeof(tmp));
croak("FATAL: ecc_sign_hash_v2 failed: %s", error_to_string(rv));
}
RETVAL = newSVpvn((char*)buffer, buffer_len);
zeromem(buffer, sizeof(buffer));
zeromem(tmp, sizeof(tmp));
}
OUTPUT:
RETVAL
int
verify_hash(Crypt::PK::ECC self, SV * sig, SV * data, const char * hash_name = "SHA1")
ALIAS:
verify_hash_rfc7518 = 3
verify_message = 1
verify_message_rfc7518 = 2
verify_hash_eth = 4
CODE:
{
int rv, stat, id;
unsigned char tmp[MAXBLOCKSIZE], *data_ptr = NULL, *sig_ptr = NULL;
unsigned long tmp_len = MAXBLOCKSIZE;
STRLEN data_len = 0, sig_len = 0;
ltc_ecc_sig_opts sig_opts;
sig_opts.type = LTC_ECCSIG_ANSIX962;
sig_opts.prng = &self->pstate;
sig_opts.wprng = self->pindex;
sig_opts.enable_recovery_id = 0;
sig_opts.recovery_id = -1;
sig_opts.rfc6979_hash_alg = NULL;
data_ptr = (unsigned char *)SvPVbyte(data, data_len);
sig_ptr = (unsigned char *)SvPVbyte(sig, sig_len);
cryptx_internal_pk_prng_reseed(&self->pstate, self->pindex, &self->last_pid);
if (ix == 1 || ix == 2) {
id = cryptx_internal_find_hash(hash_name);
if (id == -1) croak("FATAL: find_hash failed for '%s'", hash_name);
rv = hash_memory(id, data_ptr, (unsigned long)data_len, tmp, &tmp_len);
if (rv != CRYPT_OK) croak("FATAL: hash_memory failed: %s", error_to_string(rv));
data_ptr = tmp;
data_len = tmp_len;
}
RETVAL = 1;
stat = 0;
if (ix == 2 || ix == 3) {
/* rfc7518 */
sig_opts.type = LTC_ECCSIG_RFC7518;
}
else if (ix == 4) {
/* eth27 */
sig_opts.type = LTC_ECCSIG_ETH27;
}
else {
/* default */
sig_opts.type = LTC_ECCSIG_ANSIX962;
}
rv = ecc_verify_hash_v2(sig_ptr, (unsigned long)sig_len, data_ptr, (unsigned long)data_len, &sig_opts, &stat, &self->key);
if (rv != CRYPT_OK || stat != 1) RETVAL = 0;
}
OUTPUT:
RETVAL
SV *
shared_secret(Crypt::PK::ECC self, Crypt::PK::ECC pubkey)
CODE:
{
int rv;
unsigned char buffer[1024];
unsigned long buffer_len = 1024;
rv = ecc_shared_secret(&self->key, &pubkey->key, buffer, &buffer_len);
if (rv != CRYPT_OK) { zeromem(buffer, sizeof(buffer)); croak("FATAL: ecc_shared_secret failed: %s", error_to_string(rv)); }
RETVAL = newSVpvn((char*)buffer, buffer_len);
zeromem(buffer, sizeof(buffer));
}
OUTPUT:
RETVAL
int
recovery_pub(Crypt::PK::ECC self, SV * sig, SV* hash, SV* recid = NULL)
ALIAS:
recovery_pub_rfc7518 = 1
recovery_pub_eth = 2
CODE:
{
int rv;
unsigned char *sig_ptr = NULL, *hash_ptr = NULL;
STRLEN hash_len = 0, sig_len = 0;
ltc_ecc_sig_opts sig_opts;
sig_opts.type = LTC_ECCSIG_ANSIX962;
sig_opts.prng = &self->pstate;
sig_opts.wprng = self->pindex;
sig_opts.enable_recovery_id = 0;
sig_opts.recovery_id = -1;
sig_opts.rfc6979_hash_alg = NULL;
if (recid != NULL) {
sig_opts.enable_recovery_id = 1;
sig_opts.recovery_id = (int) SvIV(recid);
}
else if (ix != 2) {
if (ix == 1) {
croak("FATAL: recovery_pub_rfc7518 requires recid argument");
} else {
croak("FATAL: recovery_pub requires recid argument");
}
}
sig_ptr = (unsigned char *)SvPVbyte(sig, sig_len);
hash_ptr = (unsigned char *)SvPVbyte(hash, hash_len);
cryptx_internal_pk_prng_reseed(&self->pstate, self->pindex, &self->last_pid);
if (ix == 1) {
sig_opts.type = LTC_ECCSIG_RFC7518;
}
else if (ix == 2) {
sig_opts.type = LTC_ECCSIG_ETH27;
}
else {
sig_opts.type = LTC_ECCSIG_ANSIX962;
}
rv = ecc_recover_key(sig_ptr, (unsigned long)sig_len, hash_ptr, (unsigned long) hash_len, &sig_opts, &self->key);
if (rv != CRYPT_OK) croak("FATAL: ecc_recover_key failed: %s", error_to_string(rv));
RETVAL = 1;
}
OUTPUT:
RETVAL
void
DESTROY(Crypt::PK::ECC self)
CODE:
if (self->key.type != -1) { ecc_free(&self->key); self->key.type = -1; }
if (self->pindex >= 0 && prng_is_valid(self->pindex) == CRYPT_OK && prng_descriptor[self->pindex].done) {
prng_descriptor[self->pindex].done(&self->pstate);
}
zeromem(self, sizeof(*self));
Safefree(self);