#include <stdio.h>
#include "utilities/SecCFRelease.h"
#include "utilities/der_plist.h"
#include "utilities/der_plist_internal.h"
#include <corecrypto/ccder.h>
#include <CoreFoundation/CoreFoundation.h>
const uint8_t* der_decode_string(CFAllocatorRef allocator,
CFStringRef* string, CFErrorRef *error,
const uint8_t* der, const uint8_t *der_end)
{
if (NULL == der) {
SecCFDERCreateError(kSecDERErrorNullInput, CFSTR("null input"), NULL, error);
return NULL;
}
size_t payload_size = 0;
const uint8_t *payload = ccder_decode_tl(CCDER_UTF8_STRING, &payload_size, der, der_end);
if (NULL == payload || (ssize_t) (der_end - payload) < (ssize_t) payload_size){
SecCFDERCreateError(kSecDERErrorUnknownEncoding, CFSTR("Unknown string encoding"), NULL, error);
return NULL;
}
*string = CFStringCreateWithBytes(allocator, payload, payload_size, kCFStringEncodingUTF8, false);
if (NULL == *string) {
SecCFDERCreateError(kSecDERErrorAllocationFailure, CFSTR("String allocation failed"), NULL, error);
return NULL;
}
return payload + payload_size;
}
size_t der_sizeof_string(CFStringRef str, CFErrorRef *error)
{
const CFIndex str_length = CFStringGetLength(str);
const CFIndex maximum = CFStringGetMaximumSizeForEncoding(str_length, kCFStringEncodingUTF8);
CFIndex encodedLen = 0;
CFIndex converted = CFStringGetBytes(str, CFRangeMake(0, str_length), kCFStringEncodingUTF8, 0, false, NULL, maximum, &encodedLen);
return ccder_sizeof(CCDER_UTF8_STRING, (converted == str_length) ? encodedLen : 0);
}
uint8_t* der_encode_string(CFStringRef string, CFErrorRef *error,
const uint8_t *der, uint8_t *der_end)
{
if (NULL == der_end) {
SecCFDERCreateError(kSecDERErrorNullInput, CFSTR("null input"), NULL, error);
return NULL;
}
const CFIndex str_length = CFStringGetLength(string);
ptrdiff_t der_space = der_end - der;
CFIndex bytes_used = 0;
uint8_t *buffer = der_end - der_space;
CFIndex converted = CFStringGetBytes(string, CFRangeMake(0, str_length), kCFStringEncodingUTF8, 0, false, buffer, der_space, &bytes_used);
if (converted != str_length){
SecCFDERCreateError(kSecDERErrorUnsupportedCFObject, CFSTR("String extraction failed"), NULL, error);
return NULL;
}
return SecCCDEREncodeHandleResult(ccder_encode_tl(CCDER_UTF8_STRING, bytes_used, der,
ccder_encode_body(bytes_used, buffer, der, der_end)),
error);
}