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#include "rw.h"
#include <openssl/asn1.h>
#include <stdio.h>
TRwKey* RwNew(void) {
TRwKey* ret = NULL;
ret = (TRwKey*)malloc(sizeof(TRwKey));
if (ret == NULL) {
return (NULL);
}
ret->Meth = RwDefaultMethods();
ret->P = NULL;
ret->Q = NULL;
ret->N = NULL;
ret->Iqmp = NULL;
ret->Twomq = NULL;
ret->Twomp = NULL;
ret->Dp = NULL;
ret->Dq = NULL;
return ret;
}
void RwFree(TRwKey* r) {
if (r == NULL)
return;
if (r->P != NULL)
BN_clear_free(r->P);
if (r->Q != NULL)
BN_clear_free(r->Q);
if (r->N != NULL)
BN_clear_free(r->N);
if (r->Iqmp != NULL)
BN_clear_free(r->Iqmp);
if (r->Dp != NULL)
BN_clear_free(r->Dp);
if (r->Dq != NULL)
BN_clear_free(r->Dq);
if (r->Twomp != NULL)
BN_clear_free(r->Twomp);
if (r->Twomq != NULL)
BN_clear_free(r->Twomq);
free(r);
}
int RwSize(const TRwKey* r) {
int ret = 0, i = 0;
ASN1_INTEGER bs;
unsigned char buf[4]; /* 4 bytes looks really small.
However, i2d_ASN1_INTEGER() will not look
beyond the first byte, as long as the second
parameter is NULL. */
i = BN_num_bits(r->N);
bs.length = (i + 7) / 8;
bs.data = buf;
bs.type = V_ASN1_INTEGER;
/* If the top bit is set the asn1 encoding is 1 larger. */
buf[0] = 0xff;
i = i2d_ASN1_INTEGER(&bs, NULL);
ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE);
return ret;
}
int RwModSize(const TRwKey* rw) {
if (rw == NULL || rw->N == NULL)
return 0;
return BN_num_bytes(rw->N);
}
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