static int capi_get_provname(CAPI_CTX *ctx, LPSTR *pname, DWORD *ptype, DWORD idx)
{
LPSTR name;
DWORD len, err;
CAPI_trace(ctx, "capi_get_provname, index=%d\n", idx);
if (!CryptEnumProvidersA(idx, NULL, 0, ptype, NULL, &len))
{
err = GetLastError();
if (err == ERROR_NO_MORE_ITEMS)
return 2;
CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
capi_adderror(err);
return 0;
}
name = OPENSSL_malloc(len);
if (!CryptEnumProvidersA(idx, NULL, 0, ptype, name, &len))
{
err = GetLastError();
if (err == ERROR_NO_MORE_ITEMS)
return 2;
CAPIerr(CAPI_F_CAPI_GET_PROVNAME, CAPI_R_CRYPTENUMPROVIDERS_ERROR);
capi_adderror(err);
return 0;
}
*pname = name;
CAPI_trace(ctx, "capi_get_provname, returned name=%s, type=%d\n", name, *ptype);
return 1;
}
impl(const std::string & token) : provider(token) {
char buffer[80];
DWORD type;
DWORD len;
// Find the type of the provider
for(DWORD i = 0; ; ++i) {
len = sizeof(buffer);
if(!CryptEnumProvidersA(i, NULL, 0, &type, buffer, &len)) {
error("Could not find provider name");
}
if(buffer == provider) {
break;
}
}
if(!CryptAcquireContextA(&hProv, NULL, provider.c_str(), type,
CRYPT_VERIFYCONTEXT | CRYPT_SILENT)) {
error("Could not acquire CSP context");
}
}
