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|
MODULE = CryptX PACKAGE = Crypt::PK::DH
PROTOTYPES: DISABLE
Crypt::PK::DH
_new(Class)
CODE:
{
int rv;
Newz(0, RETVAL, 1, struct dh_struct);
if (!RETVAL) croak("FATAL: Newz failed");
RETVAL->key.type = -1;
RETVAL->pindex = find_prng("chacha20");
if (RETVAL->pindex == -1) {
Safefree(RETVAL);
croak("FATAL: find_prng('chacha20') failed");
}
rv = rng_make_prng(320, RETVAL->pindex, &RETVAL->pstate, NULL); /* 320bits = 40bytes */
if (rv != CRYPT_OK) {
Safefree(RETVAL);
croak("FATAL: rng_make_prng failed: %s", error_to_string(rv));
}
}
OUTPUT:
RETVAL
void
_generate_key_size(Crypt::PK::DH self, int groupsize=256)
PPCODE:
{
int rv;
rv = dh_set_pg_groupsize(groupsize, &self->key);
if (rv != CRYPT_OK) croak("FATAL: dh_set_pg_groupsize failed: %s", error_to_string(rv));
rv = dh_generate_key(&self->pstate, self->pindex, &self->key);
if (rv != CRYPT_OK) croak("FATAL: dh_generate_key failed: %s", error_to_string(rv));
XPUSHs(ST(0)); /* return self */
}
void
_generate_key_gp(Crypt::PK::DH self, char *g, char *p)
PPCODE:
{
int rv;
unsigned char pbin[1024], gbin[512];
unsigned long plen=sizeof(pbin), glen=sizeof(gbin);
if (p && strlen(p) > 0 && g && strlen(g) > 0) {
rv = radix_to_bin(p, 16, pbin, &plen);
if (rv != CRYPT_OK) croak("FATAL: radix_to_bin(p) failed: %s", error_to_string(rv));
rv = radix_to_bin(g, 16, gbin, &glen);
if (rv != CRYPT_OK) croak("FATAL: radix_to_bin(g) failed: %s", error_to_string(rv));
rv = dh_set_pg(pbin, plen, gbin, glen, &self->key);
if (rv != CRYPT_OK) croak("FATAL: dh_set_pg failed: %s", error_to_string(rv));
rv = dh_generate_key(&self->pstate, self->pindex, &self->key);
if (rv != CRYPT_OK) croak("FATAL: dh_generate_key failed: %s", error_to_string(rv));
}
XPUSHs(ST(0)); /* return self */
}
void
_generate_key_dhparam(Crypt::PK::DH self, SV * dhparam)
PPCODE:
{
int rv;
unsigned char *data=NULL;
STRLEN data_len=0;
data = (unsigned char *)SvPVbyte(dhparam, data_len);
/* load d p q */
rv = dh_set_pg_dhparam(data, (unsigned long)data_len, &self->key);
if (rv != CRYPT_OK) croak("FATAL: dh_set_pg_dhparam failed: %s", error_to_string(rv));
/* gen the key */
rv = dh_generate_key(&self->pstate, self->pindex, &self->key);
if (rv != CRYPT_OK) croak("FATAL: dh_generate_key failed: %s", error_to_string(rv));
XPUSHs(ST(0)); /* return self */
}
void
_import(Crypt::PK::DH 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) { dh_free(&self->key); self->key.type = -1; }
rv = dh_import(data, (unsigned long)data_len, &self->key);
if (rv != CRYPT_OK) croak("FATAL: dh_import failed: %s", error_to_string(rv));
XPUSHs(ST(0)); /* return self */
}
void
_import_raw(Crypt::PK::DH self, SV * raw_key, int type, char * g, char * p)
PPCODE:
{
int rv;
unsigned char *data=NULL;
STRLEN data_len=0;
unsigned char pbin[1024], gbin[512];
unsigned long plen=sizeof(pbin), glen=sizeof(gbin);
data = (unsigned char *)SvPVbyte(raw_key, data_len);
if (self->key.type != -1) { dh_free(&self->key); self->key.type = -1; }
if (p && strlen(p) > 0 && g && strlen(g) > 0) {
rv = radix_to_bin(p, 16, pbin, &plen);
if (rv != CRYPT_OK) croak("FATAL: radix_to_bin(p) failed: %s", error_to_string(rv));
rv = radix_to_bin(g, 16, gbin, &glen);
if (rv != CRYPT_OK) croak("FATAL: radix_to_bin(g) failed: %s", error_to_string(rv));
rv = dh_set_pg(pbin, plen, gbin, glen, &self->key);
if (rv != CRYPT_OK) croak("FATAL: dh_set_pg failed: %s", error_to_string(rv));
if (type == 0) {
/* public */
rv = dh_set_key(data, (unsigned long)data_len, PK_PUBLIC, &self->key);
if (rv != CRYPT_OK) croak("FATAL: dh_set_key failed: %s", error_to_string(rv));
}
else if (type == 1) {
/* private */
rv = dh_set_key(data, (unsigned long)data_len, PK_PRIVATE, &self->key);
if (rv != CRYPT_OK) croak("FATAL: dh_set_key failed: %s", error_to_string(rv));
}
else {
croak("FATAL: import_raw invalid type '%d'", type);
}
}
XPUSHs(ST(0)); /* return self */
}
int
is_private(Crypt::PK::DH self)
CODE:
if (self->key.type == -1) XSRETURN_UNDEF;
RETVAL = (self->key.type == PK_PRIVATE) ? 1 : 0;
OUTPUT:
RETVAL
int
size(Crypt::PK::DH self)
CODE:
if (self->key.type == -1) XSRETURN_UNDEF;
RETVAL = dh_get_groupsize(&self->key);
OUTPUT:
RETVAL
SV*
key2hash(Crypt::PK::DH self)
PREINIT:
HV *rv_hash;
size_t siz;
char buf[20001];
SV **not_used;
CODE:
if (self->key.type == -1) XSRETURN_UNDEF;
rv_hash = newHV();
/* x */
siz = (self->key.x) ? mp_ubin_size(self->key.x) : 0;
if (siz>10000) {
croak("FATAL: key2hash failed - 'x' too big number");
}
if (siz>0) {
cryptx_internal_mp2hex_with_leading_zero(self->key.x, buf, 20000, 0);
not_used = hv_store(rv_hash, "x", 1, newSVpv(buf, strlen(buf)), 0);
}
else{
not_used = hv_store(rv_hash, "x", 1, newSVpv("", 0), 0);
}
/* y */
siz = (self->key.y) ? mp_ubin_size(self->key.y) : 0;
if (siz>10000) {
croak("FATAL: key2hash failed - 'y' too big number");
}
if (siz>0) {
cryptx_internal_mp2hex_with_leading_zero(self->key.y, buf, 20000, 0);
not_used = hv_store(rv_hash, "y", 1, newSVpv(buf, strlen(buf)), 0);
}
else{
not_used = hv_store(rv_hash, "y", 1, newSVpv("", 0), 0);
}
/* p */
siz = (self->key.prime) ? mp_ubin_size(self->key.prime) : 0;
if (siz>10000) {
croak("FATAL: key2hash failed - 'p' too big number");
}
if (siz>0) {
cryptx_internal_mp2hex_with_leading_zero(self->key.prime, buf, 20000, 0);
not_used = hv_store(rv_hash, "p", 1, newSVpv(buf, strlen(buf)), 0);
}
else {
not_used = hv_store(rv_hash, "p", 1, newSVpv("", 0), 0);
}
/* g */
siz = (self->key.base) ? mp_ubin_size(self->key.base) : 0;
if (siz>10000) {
croak("FATAL: key2hash failed - 'g' too big number");
}
if (siz>0) {
cryptx_internal_mp2hex_with_leading_zero(self->key.base, buf, 20000, 0);
not_used = hv_store(rv_hash, "g", 1, newSVpv(buf, strlen(buf)), 0);
}
else {
not_used = hv_store(rv_hash, "g", 1, newSVpv("", 0), 0);
}
/* size */
not_used = hv_store(rv_hash, "size", 4, newSViv(dh_get_groupsize(&self->key)), 0);
/* type */
not_used = hv_store(rv_hash, "type", 4, newSViv(self->key.type), 0);
LTC_UNUSED_PARAM(not_used);
RETVAL = newRV_noinc((SV*)rv_hash);
OUTPUT:
RETVAL
SV*
params2hash(Crypt::PK::DH self)
PREINIT:
HV *rv_hash;
long siz;
char buf[20001];
SV **not_used;
CODE:
if (self->key.type == -1) XSRETURN_UNDEF;
rv_hash = newHV();
/* p */
siz = (self->key.prime) ? mp_ubin_size(self->key.prime) : 0;
if (siz>10000) {
croak("FATAL: key2hash failed - 'p' too big number");
}
if (siz>0) {
cryptx_internal_mp2hex_with_leading_zero(self->key.prime, buf, 20000, 0);
not_used = hv_store(rv_hash, "p", 1, newSVpv(buf, strlen(buf)), 0);
}
else {
not_used = hv_store(rv_hash, "p", 1, newSVpv("", 0), 0);
}
/* g */
siz = (self->key.base) ? mp_ubin_size(self->key.base) : 0;
if (siz>10000) {
croak("FATAL: key2hash failed - 'g' too big number");
}
if (siz>0) {
cryptx_internal_mp2hex_with_leading_zero(self->key.base, buf, 20000, 0);
not_used = hv_store(rv_hash, "g", 1, newSVpv(buf, strlen(buf)), 0);
}
else {
not_used = hv_store(rv_hash, "g", 1, newSVpv("", 0), 0);
}
if (not_used) not_used = NULL; /* just silence the warning: variable 'not_used' set but not used */
RETVAL = newRV_noinc((SV*)rv_hash);
OUTPUT:
RETVAL
SV *
export_key(Crypt::PK::DH self, char * type)
CODE:
{
int rv;
unsigned long int out_len = 4096;
unsigned char out[4096];
RETVAL = newSVpvn(NULL, 0); /* undef */
if (strnEQ(type, "private", 7)) {
rv = dh_export(out, &out_len, PK_PRIVATE, &self->key);
if (rv != CRYPT_OK) croak("FATAL: dh_export(PK_PRIVATE) failed: %s", error_to_string(rv));
RETVAL = newSVpvn((char*)out, out_len);
}
else if (strnEQ(type, "public", 6)) {
rv = dh_export(out, &out_len, PK_PUBLIC, &self->key);
if (rv != CRYPT_OK) croak("FATAL: dh_export(PK_PUBLIC) failed: %s", error_to_string(rv));
RETVAL = newSVpvn((char*)out, out_len);
}
else {
croak("FATAL: export_key_der invalid type '%s'", type);
}
}
OUTPUT:
RETVAL
SV *
shared_secret(Crypt::PK::DH self, Crypt::PK::DH pubkey)
CODE:
{
int rv;
unsigned long buffer_len = 1024;
unsigned char buffer[1024];
rv = dh_shared_secret(&self->key, &pubkey->key, buffer, &buffer_len);
if (rv != CRYPT_OK) croak("FATAL: dh_shared_secret failed: %s", error_to_string(rv));
RETVAL = newSVpvn((char*)buffer, buffer_len);
}
OUTPUT:
RETVAL
SV *
export_key_raw(Crypt::PK::DH self, char * type)
CODE:
{
int rv;
unsigned char out[1024];
unsigned long out_len = 1024;
RETVAL = newSVpvn(NULL, 0); /* undef */
if (strnEQ(type, "private", 7)) {
rv = dh_export_key(out, &out_len, PK_PRIVATE, &self->key);
if (rv != CRYPT_OK) croak("FATAL: dh_export_key(PK_PRIVATE) failed: %s", error_to_string(rv));
RETVAL = newSVpvn((char*)out, out_len);
}
else if (strnEQ(type, "public", 6)) {
rv = dh_export_key(out, &out_len, PK_PUBLIC, &self->key);
if (rv != CRYPT_OK) croak("FATAL: dh_export_key(PK_PUBLIC) failed: %s", error_to_string(rv));
RETVAL = newSVpvn((char*)out, out_len);
}
else {
croak("FATAL: export_key_raw: invalid type '%s'", type);
}
}
OUTPUT:
RETVAL
void
DESTROY(Crypt::PK::DH self)
CODE:
if (self->key.type != -1) { dh_free(&self->key); self->key.type = -1; }
Safefree(self);
|
