mirror of
https://github.com/ossrs/srs.git
synced 2025-03-09 15:49:59 +00:00
117 lines
2.6 KiB
C
117 lines
2.6 KiB
C
/*
|
|
* Copyright 2005-2017 The OpenSSL Project Authors. All Rights Reserved.
|
|
*
|
|
* Licensed under the OpenSSL license (the "License"). You may not use
|
|
* this file except in compliance with the License. You can obtain a copy
|
|
* in the file LICENSE in the source distribution or at
|
|
* https://www.openssl.org/source/license.html
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include "internal/cryptlib.h"
|
|
#include <openssl/bn.h>
|
|
#include <openssl/rsa.h>
|
|
#include <openssl/objects.h>
|
|
|
|
int RSA_padding_add_X931(unsigned char *to, int tlen,
|
|
const unsigned char *from, int flen)
|
|
{
|
|
int j;
|
|
unsigned char *p;
|
|
|
|
/*
|
|
* Absolute minimum amount of padding is 1 header nibble, 1 padding
|
|
* nibble and 2 trailer bytes: but 1 hash if is already in 'from'.
|
|
*/
|
|
|
|
j = tlen - flen - 2;
|
|
|
|
if (j < 0) {
|
|
RSAerr(RSA_F_RSA_PADDING_ADD_X931, RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
|
|
return -1;
|
|
}
|
|
|
|
p = (unsigned char *)to;
|
|
|
|
/* If no padding start and end nibbles are in one byte */
|
|
if (j == 0) {
|
|
*p++ = 0x6A;
|
|
} else {
|
|
*p++ = 0x6B;
|
|
if (j > 1) {
|
|
memset(p, 0xBB, j - 1);
|
|
p += j - 1;
|
|
}
|
|
*p++ = 0xBA;
|
|
}
|
|
memcpy(p, from, (unsigned int)flen);
|
|
p += flen;
|
|
*p = 0xCC;
|
|
return 1;
|
|
}
|
|
|
|
int RSA_padding_check_X931(unsigned char *to, int tlen,
|
|
const unsigned char *from, int flen, int num)
|
|
{
|
|
int i = 0, j;
|
|
const unsigned char *p;
|
|
|
|
p = from;
|
|
if ((num != flen) || ((*p != 0x6A) && (*p != 0x6B))) {
|
|
RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_HEADER);
|
|
return -1;
|
|
}
|
|
|
|
if (*p++ == 0x6B) {
|
|
j = flen - 3;
|
|
for (i = 0; i < j; i++) {
|
|
unsigned char c = *p++;
|
|
if (c == 0xBA)
|
|
break;
|
|
if (c != 0xBB) {
|
|
RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_PADDING);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
j -= i;
|
|
|
|
if (i == 0) {
|
|
RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_PADDING);
|
|
return -1;
|
|
}
|
|
|
|
} else {
|
|
j = flen - 2;
|
|
}
|
|
|
|
if (p[j] != 0xCC) {
|
|
RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_TRAILER);
|
|
return -1;
|
|
}
|
|
|
|
memcpy(to, p, (unsigned int)j);
|
|
|
|
return j;
|
|
}
|
|
|
|
/* Translate between X931 hash ids and NIDs */
|
|
|
|
int RSA_X931_hash_id(int nid)
|
|
{
|
|
switch (nid) {
|
|
case NID_sha1:
|
|
return 0x33;
|
|
|
|
case NID_sha256:
|
|
return 0x34;
|
|
|
|
case NID_sha384:
|
|
return 0x36;
|
|
|
|
case NID_sha512:
|
|
return 0x35;
|
|
|
|
}
|
|
return -1;
|
|
}
|