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Exception and non exception based decoding

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This commit is contained in:
Arun M 2017-12-16 18:50:44 +05:30
parent 7a511c46fe
commit c484ced63d
4 changed files with 53 additions and 6 deletions
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4
include/jwt/impl/error_codes.ipp
View file

@ -43,6 +43,8 @@ struct DecodeErrorCategory: std::error_category
{
switch (static_cast<DecodeErrc>(ev))
{
case DecodeErrc::EmptyAlgoList:
return "empty algorithm list";
case DecodeErrc::AlgHeaderMiss:
return "missing algorithm header";
case DecodeErrc::TypHeaderMiss:
@ -82,6 +84,8 @@ struct VerificationErrorCategory: std::error_category
return "invalid audience";
case VerificationErrc::ImmatureSignature:
return "immature signature";
case VerificationErrc::InvalidSignature:
return "invalid signature";
};
assert (0 && "Code not reached");

41
include/jwt/impl/jwt.ipp
View file

@ -470,10 +470,15 @@ template <typename SequenceT, typename... Args>
jwt_object decode(const string_view enc_str,
const string_view key,
const params::detail::algorithms_param<SequenceT>& algos,
std::error_code& ec,
Args&&... args)
{
ec.clear();
jwt_object obj;
if (algos.get().size() == 0) {
throw DecodeError("Algorithms list cannot be empty");
ec = DecodeErrc::EmptyAlgoList;
return obj;
}
struct decode_params
@ -495,7 +500,6 @@ jwt_object decode(const string_view enc_str,
decode_params dparams{};
set_decode_params(dparams, std::forward<Args>(args)...);
jwt_object obj;
auto parts = jwt_object::three_parts(enc_str);
//throws decode error
@ -505,7 +509,9 @@ jwt_object decode(const string_view enc_str,
obj.payload(jwt_payload{parts[1]});
if (dparams.verify) {
std::error_code ec = obj.verify(dparams, algos);
ec = obj.verify(dparams, algos);
if (ec) return obj;
}
jwt_signature jsign{key};
@ -514,18 +520,43 @@ jwt_object decode(const string_view enc_str,
// Addition of '1' to account for the '.' character.
auto l = parts[0].length() + 1 + parts[1].length();
//MemoryAllocationError is not caught
verify_result_t res = jsign.verify(obj.header(), enc_str.substr(0, l), parts[2]);
if (res.second) {
throw VerificationError(res.second.message());
ec = res.second;
return obj;
}
if (!res.first) {
throw VerificationError("Verification failed due to unknown reason");
ec = VerificationErrc::InvalidSignature;
return obj;
}
return obj;
}
template <typename SequenceT, typename... Args>
jwt_object decode(const string_view enc_str,
const string_view key,
const params::detail::algorithms_param<SequenceT>& algos,
Args&&... args)
{
std::error_code ec{};
auto jwt_obj = decode(enc_str,
key,
algos,
ec,
std::forward<Args>(args)...);
if (ec) {
jwt_throw_exception(ec);
}
return jwt_obj;
}
} // END namespace jwt