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base64_decode() also forcefully returns on dst == NULL

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This commit is contained in:
Paul Bakker 2013-07-05 10:29:12 +02:00
parent 82024bf7b9
commit f4a1427ae7
2 changed files with 6 additions and 6 deletions
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8
include/polarssl/base64.h
View File

@ -3,7 +3,7 @@
*
* \brief RFC 1521 base64 encoding/decoding
*
* Copyright (C) 2006-2010, Brainspark B.V.
* Copyright (C) 2006-2013, Brainspark B.V.
*
* This file is part of PolarSSL (http://www.polarssl.org)
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@ -57,7 +57,7 @@ int base64_encode( unsigned char *dst, size_t *dlen,
/**
* \brief Decode a base64-formatted buffer
*
* \param dst destination buffer
* \param dst destination buffer (can be NULL for checking size)
* \param dlen size of the buffer
* \param src source buffer
* \param slen amount of data to be decoded
@ -67,8 +67,8 @@ int base64_encode( unsigned char *dst, size_t *dlen,
* not correct. *dlen is always updated to reflect the amount
* of data that has (or would have) been written.
*
* \note Call this function with *dlen = 0 to obtain the
* required buffer size in *dlen
* \note Call this function with *dst = NULL or *dlen = 0 to obtain
* the required buffer size in *dlen
*/
int base64_decode( unsigned char *dst, size_t *dlen,
const unsigned char *src, size_t slen );

4
library/base64.c
View File

@ -1,7 +1,7 @@
/*
* RFC 1521 base64 encoding/decoding
*
* Copyright (C) 2006-2010, Brainspark B.V.
* Copyright (C) 2006-2013, Brainspark B.V.
*
* This file is part of PolarSSL (http://www.polarssl.org)
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
@ -163,7 +163,7 @@ int base64_decode( unsigned char *dst, size_t *dlen,
n = ((n * 6) + 7) >> 3;
if( *dlen < n )
if( dst == NULL || *dlen < n )
{
*dlen = n;
return( POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL );