Move magic enum to local and avoid allocation

CMakeLists.txt

@@ -39,6 +39,7 @@ add_library(${PROJECT_NAME}
     src/electronic-ids/ms-cryptoapi/MsCryptoApiElectronicID.cpp
     src/electronic-ids/ms-cryptoapi/MsCryptoApiElectronicID.hpp
   >
+  src/magic_enum/magic_enum.hpp
 )
 
 target_include_directories(${PROJECT_NAME}

include/electronic-id/electronic-id.hpp

@@ -26,6 +26,7 @@
 
 #include <functional>
 #include <optional>
+#include <set>
 
 namespace electronic_id
 {
@@ -99,15 +100,15 @@ class ElectronicID
      * By default, this function does nothing. It serves as an extension point for
      * Pkcs11ElectronicID which needs to release the PKCS#11 module before the application exits to
      * prevent potential crashes. */
-    virtual void release() const {}
+    virtual void release() const { }
 
     virtual std::string name() const = 0;
     virtual Type type() const = 0;
 
     virtual pcsc_cpp::SmartCard const& smartcard() const { return card; }
 
 protected:
-    ElectronicID(pcsc_cpp::SmartCard&& _card) noexcept : card(std::move(_card)) {}
+    ElectronicID(pcsc_cpp::SmartCard&& _card) noexcept : card(std::move(_card)) { }
 
     pcsc_cpp::SmartCard card;
 };

include/electronic-id/enums.hpp

@@ -24,7 +24,6 @@
 
 #include "pcsc-cpp/pcsc-cpp.hpp"
 
-#include <set>
 #include <string>
 
 namespace electronic_id
@@ -35,15 +34,17 @@ class CertificateType
 public:
     enum CertificateTypeEnum : int8_t { AUTHENTICATION, SIGNING, NONE = -1 };
 
-    CertificateType() = default;
-    constexpr CertificateType(const CertificateTypeEnum _value) : value(_value) {}
+    constexpr CertificateType() noexcept = default;
+    constexpr CertificateType(const CertificateTypeEnum _value) noexcept : value(_value) { }
 
-    bool isAuthentication() const { return value == AUTHENTICATION; }
+    constexpr bool isAuthentication() const noexcept { return value == AUTHENTICATION; }
+    constexpr bool isSigning() const noexcept { return value == SIGNING; }
 
-    bool isSigning() const { return value == SIGNING; }
-
-    constexpr bool operator==(const CertificateType other) const { return value == other.value; }
-    operator std::string() const;
+    constexpr bool operator==(const CertificateType other) const noexcept
+    {
+        return value == other.value;
+    }
+    operator std::string_view() const noexcept;
 
 private:
     CertificateTypeEnum value = NONE;
@@ -66,27 +67,27 @@ class HashAlgorithm
         NONE = -1
     };
 
-    HashAlgorithm() = default;
-    constexpr HashAlgorithm(const HashAlgorithmEnum _value) : value(_value) {}
+    constexpr HashAlgorithm() = default;
+    constexpr HashAlgorithm(const HashAlgorithmEnum _value) noexcept : value(_value) { }
     // String conversion constructor.
-    HashAlgorithm(const std::string&);
+    explicit HashAlgorithm(const std::string&);
 
     constexpr bool operator==(HashAlgorithmEnum other) const { return value == other; }
-    constexpr operator HashAlgorithmEnum() const { return value; }
+    constexpr operator HashAlgorithmEnum() const noexcept { return value; }
 
-    operator std::string() const;
+    operator std::string_view() const noexcept;
 
-    constexpr size_t hashByteLength() const
+    constexpr size_t hashByteLength() const noexcept
     {
-        return size_t(value <= SHA512 ? value / 8 : (value / 10) / 8);
+        return size_t((value <= SHA512 ? value : (value / 10)) / 8);
     }
 
-    constexpr bool isSHA2() const
+    constexpr bool isSHA2() const noexcept
     {
         return value >= HashAlgorithm::SHA224 && value <= HashAlgorithm::SHA512;
     }
 
-    constexpr bool isSHA3() const
+    constexpr bool isSHA3() const noexcept
     {
         return value >= HashAlgorithm::SHA3_224 && value <= HashAlgorithm::SHA3_512;
     }
@@ -136,26 +137,25 @@ class SignatureAlgorithm
         NONE = -1
     };
 
-    constexpr SignatureAlgorithm(const SignatureAlgorithmEnum _value) : value(_value) {}
-    constexpr SignatureAlgorithm(const SignatureAlgorithmEnum key, const HashAlgorithm hash) :
+    constexpr SignatureAlgorithm(const SignatureAlgorithmEnum _value) noexcept : value(_value) { }
+    constexpr SignatureAlgorithm(const SignatureAlgorithmEnum key,
+                                 const HashAlgorithm hash) noexcept :
         value(SignatureAlgorithmEnum(key | int16_t(hash)))
     {
     }
 
-    constexpr bool operator==(HashAlgorithm other) const
+    constexpr bool operator==(HashAlgorithm other) const noexcept
     {
         return other.operator==(operator HashAlgorithm());
     }
-    constexpr bool operator==(SignatureAlgorithmEnum other) const { return value == other; }
-
-    constexpr operator HashAlgorithm() const
+    constexpr operator HashAlgorithm() const noexcept
     {
         return HashAlgorithm::HashAlgorithmEnum(value & ~(ES | PS | RS));
     }
 
-    constexpr operator SignatureAlgorithmEnum() const { return value; }
+    constexpr operator SignatureAlgorithmEnum() const noexcept { return value; }
 
-    operator std::string() const;
+    operator std::string_view() const noexcept;
 
 private:
     SignatureAlgorithmEnum value = NONE;
@@ -178,14 +178,14 @@ class JsonWebSignatureAlgorithm
         NONE = -1
     };
 
-    constexpr JsonWebSignatureAlgorithm(const JsonWebSignatureAlgorithmEnum _value) : value(_value)
+    constexpr JsonWebSignatureAlgorithm(const JsonWebSignatureAlgorithmEnum _value) noexcept :
+        value(_value)
     {
     }
 
-    constexpr bool operator==(JsonWebSignatureAlgorithmEnum other) const { return value == other; }
-    constexpr operator JsonWebSignatureAlgorithmEnum() const { return value; }
+    constexpr operator JsonWebSignatureAlgorithmEnum() const noexcept { return value; }
 
-    operator std::string() const;
+    operator std::string_view() const noexcept;
 
     constexpr HashAlgorithm hashAlgorithm() const
     {
@@ -208,12 +208,12 @@ class JsonWebSignatureAlgorithm
         }
     }
 
-    constexpr bool isRSAWithPKCS1Padding()
+    constexpr bool isRSAWithPKCS1Padding() const noexcept
     {
         return value == RS256 || value == RS384 || value == RS512;
     }
 
-    constexpr size_t hashByteLength() const { return hashAlgorithm().hashByteLength(); }
+    constexpr size_t hashByteLength() const noexcept { return hashAlgorithm().hashByteLength(); }
 
 private:
     JsonWebSignatureAlgorithmEnum value = NONE;

lib/libpcsc-cpp/CMakeLists.txt

@@ -9,7 +9,6 @@ add_library(${PROJECT_NAME}
   include/${PROJECT_NAME}/${PROJECT_NAME}.hpp
   include/${PROJECT_NAME}/${PROJECT_NAME}-utils.hpp
   include/${PROJECT_NAME}/comp_winscard.hpp
-  include/magic_enum/magic_enum.hpp
   src/Context.hpp
   src/SCardCall.hpp
   src/SmartCard.cpp

lib/libpcsc-cpp/include/pcsc-cpp/pcsc-cpp-utils.hpp

@@ -69,7 +69,5 @@ constexpr const char* removeAbsolutePathPrefix(std::string_view filePath)
 
 #define REQUIRE_NON_NULL(val)                                                                      \
     if (!(val)) {                                                                                  \
-        throw std::logic_error("Null " + std::string(#val) + " in "                                \
-                               + pcsc_cpp::removeAbsolutePathPrefix(__FILE__) + ':'                \
-                               + std::to_string(__LINE__) + ':' + __func__);                       \
+        THROW(std::logic_error, "Null " #val);                                                     \
     }

src/electronic-id.cpp

@@ -211,11 +211,11 @@ const std::vector<MaskedATREntry> MASKED_ATRS = {
      constructor<ElectronicID::Type::LuxEID>},
 };
 
-const auto SUPPORTED_ALGORITHMS = std::map<std::string, HashAlgorithm> {
-    {"SHA-224"s, HashAlgorithm::SHA224},    {"SHA-256"s, HashAlgorithm::SHA256},
-    {"SHA-384"s, HashAlgorithm::SHA384},    {"SHA-512"s, HashAlgorithm::SHA512},
-    {"SHA3-224"s, HashAlgorithm::SHA3_224}, {"SHA3-256"s, HashAlgorithm::SHA3_256},
-    {"SHA3-384"s, HashAlgorithm::SHA3_384}, {"SHA3-512"s, HashAlgorithm::SHA3_512},
+const auto SUPPORTED_ALGORITHMS = std::map<std::string_view, HashAlgorithm> {
+    {"SHA-224", HashAlgorithm::SHA224},    {"SHA-256", HashAlgorithm::SHA256},
+    {"SHA-384", HashAlgorithm::SHA384},    {"SHA-512", HashAlgorithm::SHA512},
+    {"SHA3-224", HashAlgorithm::SHA3_224}, {"SHA3-256", HashAlgorithm::SHA3_256},
+    {"SHA3-384", HashAlgorithm::SHA3_384}, {"SHA3-512", HashAlgorithm::SHA3_512},
 };
 
 } // namespace
@@ -265,14 +265,14 @@ bool ElectronicID::isSupportedSigningHashAlgorithm(const HashAlgorithm hashAlgo)
 }
 
 AutoSelectFailed::AutoSelectFailed(Reason r) :
-    Error(std::string("Auto-select card failed, reason: ") + std::string(magic_enum::enum_name(r))),
+    Error(std::string("Auto-select card failed, reason: ").append(magic_enum::enum_name(r))),
     _reason(r)
 {
 }
 
 VerifyPinFailed::VerifyPinFailed(const Status s, const observer_ptr<pcsc_cpp::ResponseApdu> ra,
                                  const int8_t r) :
-    Error(std::string("Verify PIN failed, status: ") + std::string(magic_enum::enum_name(s))
+    Error(std::string("Verify PIN failed, status: ").append(magic_enum::enum_name(s))
           + (ra ? ", response: " + *ra : "")),
     _status(s), _retries(r)
 {
@@ -288,68 +288,71 @@ HashAlgorithm::HashAlgorithm(const std::string& algoName)
     value = SUPPORTED_ALGORITHMS.at(algoName);
 }
 
-HashAlgorithm::operator std::string() const
+HashAlgorithm::operator std::string_view() const noexcept
 {
     const auto algoNameValuePair =
         std::find_if(SUPPORTED_ALGORITHMS.cbegin(), SUPPORTED_ALGORITHMS.cend(),
                      [this](const auto& pair) { return pair.second == value; });
-    return algoNameValuePair != SUPPORTED_ALGORITHMS.cend() ? algoNameValuePair->first : "UNKNOWN";
+    if (algoNameValuePair != SUPPORTED_ALGORITHMS.cend())
+        return algoNameValuePair->first;
+    return "UNKNOWN";
 }
 
 std::string HashAlgorithm::allSupportedAlgorithmNames()
 {
     static const auto SUPPORTED_ALGORITHM_NAMES = std::accumulate(
         std::next(SUPPORTED_ALGORITHMS.begin()), SUPPORTED_ALGORITHMS.end(),
         std::string(SUPPORTED_ALGORITHMS.begin()->first),
-        [](auto result, const auto& value) { return result + ", "s + std::string(value.first); });
+        [](auto result, const auto& value) { return (result + ", ").append(value.first); });
     return SUPPORTED_ALGORITHM_NAMES;
 }
 
 pcsc_cpp::byte_vector HashAlgorithm::rsaOID(const HashAlgorithmEnum hash)
 {
     switch (hash) {
-    case HashAlgorithm::SHA224:
+        using enum HashAlgorithm::HashAlgorithmEnum;
+    case SHA224:
         return {0x30, 0x2d, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01,
                 0x65, 0x03, 0x04, 0x02, 0x04, 0x05, 0x00, 0x04, 0x1c};
-    case HashAlgorithm::SHA256:
+    case SHA256:
         return {0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01,
                 0x65, 0x03, 0x04, 0x02, 0x01, 0x05, 0x00, 0x04, 0x20};
-    case HashAlgorithm::SHA384:
+    case SHA384:
         return {0x30, 0x41, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01,
                 0x65, 0x03, 0x04, 0x02, 0x02, 0x05, 0x00, 0x04, 0x30};
-    case HashAlgorithm::SHA512:
+    case SHA512:
         return {0x30, 0x51, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01,
                 0x65, 0x03, 0x04, 0x02, 0x03, 0x05, 0x00, 0x04, 0x40};
-    case HashAlgorithm::SHA3_224:
+    case SHA3_224:
         return {0x30, 0x2d, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01,
                 0x65, 0x03, 0x04, 0x02, 0x07, 0x05, 0x00, 0x04, 0x1c};
-    case HashAlgorithm::SHA3_256:
+    case SHA3_256:
         return {0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01,
                 0x65, 0x03, 0x04, 0x02, 0x08, 0x05, 0x00, 0x04, 0x20};
-    case HashAlgorithm::SHA3_384:
+    case SHA3_384:
         return {0x30, 0x41, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01,
                 0x65, 0x03, 0x04, 0x02, 0x09, 0x05, 0x00, 0x04, 0x30};
-    case HashAlgorithm::SHA3_512:
+    case SHA3_512:
         return {0x30, 0x51, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01,
                 0x65, 0x03, 0x04, 0x02, 0x0A, 0x05, 0x00, 0x04, 0x40};
     default:
         THROW(ArgumentFatalError, "No OID for algorithm " + std::string(HashAlgorithm(hash)));
     }
 }
 
-CertificateType::operator std::string() const
+CertificateType::operator std::string_view() const noexcept
 {
-    return std::string(magic_enum::enum_name(value));
+    return magic_enum::enum_name(value);
 }
 
-JsonWebSignatureAlgorithm::operator std::string() const
+JsonWebSignatureAlgorithm::operator std::string_view() const noexcept
 {
-    return std::string(magic_enum::enum_name(value));
+    return magic_enum::enum_name(value);
 }
 
-SignatureAlgorithm::operator std::string() const
+SignatureAlgorithm::operator std::string_view() const noexcept
 {
-    return std::string(magic_enum::enum_name(value));
+    return magic_enum::enum_name(value);
 }
 
 } // namespace electronic_id

src/electronic-ids/ms-cryptoapi/MsCryptoApiElectronicID.cpp

@@ -37,7 +37,7 @@ JsonWebSignatureAlgorithm MsCryptoApiElectronicID::authSignatureAlgorithm() cons
 byte_vector MsCryptoApiElectronicID::signWithAuthKey(byte_vector&& /* pin */,
                                                      const byte_vector& hash) const
 {
-    if (certType != CertificateType::AUTHENTICATION) {
+    if (!certType.isAuthentication()) {
         THROW(WrongCertificateTypeError,
               "This electronic ID does not support signing with the authentication key. "
               "It contains a "
@@ -59,7 +59,7 @@ ElectronicID::Signature
 MsCryptoApiElectronicID::signWithSigningKey(byte_vector&& /* pin */, const byte_vector& hash,
                                             const HashAlgorithm hashAlgo) const
 {
-    if (certType != CertificateType::SIGNING) {
+    if (!certType.isSigning()) {
         THROW(WrongCertificateTypeError,
               "This electronic ID does not support signing with the digital signature key. "
               "It contains a "