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verify jump link for valid characters

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orignal 2023-10-29 22:11:38 -04:00
parent c8ae15041f
commit 3286bdb4a7
4 changed files with 60 additions and 13 deletions
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12
libi2pd/Base.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2013-2022, The PurpleI2P Project
* Copyright (c) 2013-2023, The PurpleI2P Project
*
* This file is part of Purple i2pd project and licensed under BSD3
*
@ -28,6 +28,11 @@ namespace data
return T32;
}
bool IsBase32 (char ch)
{
return (ch >= 'a' && ch <= 'z') || (ch >= '2' && ch <= '7');
}
static void iT64Build(void);
/*
@ -55,6 +60,11 @@ namespace data
return T64;
}
bool IsBase64 (char ch)
{
return (ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z') || ch == '-' || ch == '~';
}
/*
* Reverse Substitution Table (built in run time)
*/

4
libi2pd/Base.h
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2013-2020, The PurpleI2P Project
* Copyright (c) 2013-2023, The PurpleI2P Project
*
* This file is part of Purple i2pd project and licensed under BSD3
*
@ -19,9 +19,11 @@ namespace data {
size_t Base64ToByteStream (const char * InBuffer, size_t InCount, uint8_t * OutBuffer, size_t len );
const char * GetBase32SubstitutionTable ();
const char * GetBase64SubstitutionTable ();
bool IsBase64 (char ch);
size_t Base32ToByteStream (const char * inBuf, size_t len, uint8_t * outBuf, size_t outLen);
size_t ByteStreamToBase32 (const uint8_t * InBuf, size_t len, char * outBuf, size_t outLen);
bool IsBase32 (char ch);
/**
* Compute the size for a buffer to contain encoded base64 given that the size of the input is input_size bytes