1/* 2 * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10/* 11 * RSA low level APIs are deprecated for public use, but still ok for 12 * internal use. 13 */ 14#include "internal/deprecated.h" 15 16#include "internal/cryptlib.h" 17#include <openssl/bn.h> 18#include <openssl/rsa.h> 19 20int RSA_padding_add_none(unsigned char *to, int tlen, 21 const unsigned char *from, int flen) 22{ 23 if (flen > tlen) { 24 ERR_raise(ERR_LIB_RSA, RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE); 25 return 0; 26 } 27 28 if (flen < tlen) { 29 ERR_raise(ERR_LIB_RSA, RSA_R_DATA_TOO_SMALL_FOR_KEY_SIZE); 30 return 0; 31 } 32 33 memcpy(to, from, (unsigned int)flen); 34 return 1; 35} 36 37int RSA_padding_check_none(unsigned char *to, int tlen, 38 const unsigned char *from, int flen, int num) 39{ 40 41 if (flen > tlen) { 42 ERR_raise(ERR_LIB_RSA, RSA_R_DATA_TOO_LARGE); 43 return -1; 44 } 45 46 memset(to, 0, tlen - flen); 47 memcpy(to + tlen - flen, from, flen); 48 return tlen; 49} 50