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Reject incorrect base64 in HTTP auth

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In addition, to make sure that no call site ignores the invalid
decoding status, make the pf_invalid argument mandatory.
This commit is contained in:
Pieter Wuille
2022-04-08 23:17:01 -04:00
committed by MacroFake
parent d648b5120b
commit a4377a0843
5 changed files with 17 additions and 15 deletions
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12
src/util/strencodings.cpp
View File

@@ -167,7 +167,7 @@ std::vector<unsigned char> DecodeBase64(const char* p, bool* pf_invalid)
++p;
}
valid = valid && (p - e) % 4 == 0 && p - q < 4;
if (pf_invalid) *pf_invalid = !valid;
*pf_invalid = !valid;
return ret;
}
@@ -175,9 +175,7 @@ std::vector<unsigned char> DecodeBase64(const char* p, bool* pf_invalid)
std::string DecodeBase64(const std::string& str, bool* pf_invalid)
{
if (!ValidAsCString(str)) {
if (pf_invalid) {
*pf_invalid = true;
}
*pf_invalid = true;
return {};
}
std::vector<unsigned char> vchRet = DecodeBase64(str.c_str(), pf_invalid);
@@ -245,7 +243,7 @@ std::vector<unsigned char> DecodeBase32(const char* p, bool* pf_invalid)
++p;
}
valid = valid && (p - e) % 8 == 0 && p - q < 8;
if (pf_invalid) *pf_invalid = !valid;
*pf_invalid = !valid;
return ret;
}
@@ -253,9 +251,7 @@ std::vector<unsigned char> DecodeBase32(const char* p, bool* pf_invalid)
std::string DecodeBase32(const std::string& str, bool* pf_invalid)
{
if (!ValidAsCString(str)) {
if (pf_invalid) {
*pf_invalid = true;
}
*pf_invalid = true;
return {};
}
std::vector<unsigned char> vchRet = DecodeBase32(str.c_str(), pf_invalid);

8
src/util/strencodings.h
View File

@@ -64,13 +64,13 @@ bool IsHex(std::string_view str);
* Return true if the string is a hex number, optionally prefixed with "0x"
*/
bool IsHexNumber(std::string_view str);
std::vector<unsigned char> DecodeBase64(const char* p, bool* pf_invalid = nullptr);
std::string DecodeBase64(const std::string& str, bool* pf_invalid = nullptr);
std::vector<unsigned char> DecodeBase64(const char* p, bool* pf_invalid);
std::string DecodeBase64(const std::string& str, bool* pf_invalid);
std::string EncodeBase64(Span<const unsigned char> input);
inline std::string EncodeBase64(Span<const std::byte> input) { return EncodeBase64(MakeUCharSpan(input)); }
inline std::string EncodeBase64(const std::string& str) { return EncodeBase64(MakeUCharSpan(str)); }
std::vector<unsigned char> DecodeBase32(const char* p, bool* pf_invalid = nullptr);
std::string DecodeBase32(const std::string& str, bool* pf_invalid = nullptr);
std::vector<unsigned char> DecodeBase32(const char* p, bool* pf_invalid);
std::string DecodeBase32(const std::string& str, bool* pf_invalid);
/**
* Base32 encode.