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Implement writing private key DER and PEM data

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This commit is contained in:
Sergey Abramchuk
2017-09-07 14:50:08 +03:00
parent 6b1b0c95eb
commit ebb2157390
1 changed files with 51 additions and 0 deletions
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51
OpenVPN Adapter/OpenVPNPrivateKey.m
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@@ -77,6 +77,57 @@
return key;
}
- (NSData *)pemData:(out NSError **)error {
size_t buffer_length = (self.size / 8) * 2;
unsigned char *pem_buffer = malloc(buffer_length);
int result = mbedtls_pk_write_key_pem(self.ctx, pem_buffer, buffer_length);
if (result < 0) {
if (error) {
NSString *reason = [NSError reasonFromResult:result];
*error = [NSError errorWithDomain:OpenVPNIdentityErrorDomain code:result userInfo:@{
NSLocalizedDescriptionKey: @"Failed to write PEM data.",
NSLocalizedFailureReasonErrorKey: reason
}];
}
free(pem_buffer);
return nil;
}
NSData *pemData = [[NSString stringWithCString:(const char *)pem_buffer encoding:NSUTF8StringEncoding] dataUsingEncoding:NSUTF8StringEncoding];
free(pem_buffer);
return pemData;
}
- (NSData *)derData:(out NSError **)error {
size_t buffer_length = (self.size / 8) * 2;
unsigned char *der_buffer = malloc(buffer_length);
int result = mbedtls_pk_write_key_der(self.ctx, der_buffer, buffer_length);
if (result < 0) {
if (error) {
NSString *reason = [NSError reasonFromResult:result];
*error = [NSError errorWithDomain:OpenVPNIdentityErrorDomain code:result userInfo:@{
NSLocalizedDescriptionKey: @"Failed to write DER data.",
NSLocalizedFailureReasonErrorKey: reason
}];
}
free(der_buffer);
return nil;
}
NSUInteger location = buffer_length - result;
NSRange range = NSMakeRange(location, result);
NSData *derData = [[NSData dataWithBytes:der_buffer length:buffer_length] subdataWithRange:range];
free(der_buffer);
return derData;
}
- (void)dealloc {
mbedtls_pk_free(self.ctx);
free(self.ctx);