static void keyver(FILE *in, FILE *out)
{
char buf[1024];
char lbuf[1024];
char *keyword, *value;
BIGNUM *p = NULL, *q = NULL, *g = NULL, *X = NULL, *Y = NULL;
BIGNUM *Y2;
BN_CTX *ctx = NULL;
int dsa2, L, N;
int paramcheck = 0;
ctx = BN_CTX_new();
Y2 = BN_new();
while(fgets(buf,sizeof buf,in) != NULL)
{
if (!parse_line(&keyword, &value, lbuf, buf))
{
fputs(buf,out);
continue;
}
if(!strcmp(keyword,"[mod"))
{
if (p)
BN_free(p);
p = NULL;
if (q)
BN_free(q);
q = NULL;
if (g)
BN_free(g);
g = NULL;
paramcheck = 0;
if (!parse_mod(value, &dsa2, &L, &N, NULL))
{
fprintf(stderr, "Mod Parse Error\n");
exit (1);
}
}
else if(!strcmp(keyword,"P"))
p=hex2bn(value);
else if(!strcmp(keyword,"Q"))
q=hex2bn(value);
else if(!strcmp(keyword,"G"))
g=hex2bn(value);
else if(!strcmp(keyword,"X"))
X=hex2bn(value);
else if(!strcmp(keyword,"Y"))
{
Y=hex2bn(value);
if (!p || !q || !g || !X || !Y)
{
fprintf(stderr, "Parse Error\n");
exit (1);
}
do_bn_print_name(out, "P",p);
do_bn_print_name(out, "Q",q);
do_bn_print_name(out, "G",g);
do_bn_print_name(out, "X",X);
do_bn_print_name(out, "Y",Y);
if (!paramcheck)
{
if (dss_paramcheck(L, N, p, q, g, ctx))
paramcheck = 1;
else
paramcheck = -1;
}
if (paramcheck != 1)
fprintf(out, "Result = F\n");
else
{
if (!BN_mod_exp(Y2, g, X, p, ctx) || BN_cmp(Y2, Y))
fprintf(out, "Result = F\n");
else
fprintf(out, "Result = P\n");
}
BN_free(X);
BN_free(Y);
X = NULL;
Y = NULL;
}
}
if (p)
BN_free(p);
if (q)
BN_free(q);
if (g)
BN_free(g);
if (Y2)
BN_free(Y2);
}
static void keyver()
{
char buf[1024];
char lbuf[1024];
char *keyword, *value;
BIGNUM *p = NULL, *q = NULL, *g = NULL, *X = NULL, *Y = NULL;
BIGNUM *Y2;
BN_CTX *ctx = NULL;
int nmod = 0, paramcheck = 0;
ctx = BN_CTX_new();
Y2 = BN_new();
while (fgets(buf, sizeof buf, stdin) != NULL) {
if (!parse_line(&keyword, &value, lbuf, buf)) {
fputs(buf, stdout);
continue;
}
if (!strcmp(keyword, "[mod")) {
if (p)
BN_free(p);
p = NULL;
if (q)
BN_free(q);
q = NULL;
if (g)
BN_free(g);
g = NULL;
paramcheck = 0;
nmod = atoi(value);
} else if (!strcmp(keyword, "P"))
p = hex2bn(value);
else if (!strcmp(keyword, "Q"))
q = hex2bn(value);
else if (!strcmp(keyword, "G"))
g = hex2bn(value);
else if (!strcmp(keyword, "X"))
X = hex2bn(value);
else if (!strcmp(keyword, "Y")) {
Y = hex2bn(value);
if (!p || !q || !g || !X || !Y) {
fprintf(stderr, "Parse Error\n");
exit(1);
}
pbn("P", p);
pbn("Q", q);
pbn("G", g);
pbn("X", X);
pbn("Y", Y);
if (!paramcheck) {
if (dss_paramcheck(nmod, p, q, g, ctx))
paramcheck = 1;
else
paramcheck = -1;
}
if (paramcheck != 1)
printf("Result = F\n");
else {
if (!BN_mod_exp(Y2, g, X, p, ctx) || BN_cmp(Y2, Y))
printf("Result = F\n");
else
printf("Result = P\n");
}
BN_free(X);
BN_free(Y);
X = NULL;
Y = NULL;
}
}
if (p)
BN_free(p);
if (q)
BN_free(q);
if (g)
BN_free(g);
if (Y2)
BN_free(Y2);
}
