5 files changed, 10 insertions, 10 deletions
diff --git a/src/lib/modes/aead/ocb/ocb.cpp b/src/lib/modes/aead/ocb/ocb.cpp
index 08157cd47..77126ec7a 100644
--- a/src/lib/modes/aead/ocb/ocb.cpp
+++ b/src/lib/modes/aead/ocb/ocb.cpp
@@ -15,7 +15,7 @@ namespace Botan {
 class L_computer
    {
    public:
-      L_computer(const BlockCipher& cipher)
+      explicit L_computer(const BlockCipher& cipher)
          {
          m_L_star.resize(cipher.block_size());
          cipher.encrypt(m_L_star);
diff --git a/src/lib/modes/aead/siv/siv.h b/src/lib/modes/aead/siv/siv.h
index d46c7dcfd..d3e4c5270 100644
--- a/src/lib/modes/aead/siv/siv.h
+++ b/src/lib/modes/aead/siv/siv.h
@@ -43,7 +43,7 @@ class BOTAN_DLL SIV_Mode : public AEAD_Mode
       size_t tag_size() const override { return 16; }
 
    protected:
-      SIV_Mode(BlockCipher* cipher);
+      explicit SIV_Mode(BlockCipher* cipher);
 
       StreamCipher& ctr() { return *m_ctr; }
 
@@ -73,7 +73,7 @@ class BOTAN_DLL SIV_Encryption final : public SIV_Mode
       /**
       * @param cipher a block cipher
       */
-      SIV_Encryption(BlockCipher* cipher) : SIV_Mode(cipher) {}
+      explicit SIV_Encryption(BlockCipher* cipher) : SIV_Mode(cipher) {}
 
       void finish(secure_vector<byte>& final_block, size_t offset = 0) override;
 
@@ -92,7 +92,7 @@ class BOTAN_DLL SIV_Decryption final : public SIV_Mode
       /**
       * @param cipher a 128-bit block cipher
       */
-      SIV_Decryption(BlockCipher* cipher) : SIV_Mode(cipher) {}
+      explicit SIV_Decryption(BlockCipher* cipher) : SIV_Mode(cipher) {}
 
       void finish(secure_vector<byte>& final_block, size_t offset = 0) override;
 
diff --git a/src/lib/modes/cbc/cbc.h b/src/lib/modes/cbc/cbc.h
index 9a767d3a0..961991d4a 100644
--- a/src/lib/modes/cbc/cbc.h
+++ b/src/lib/modes/cbc/cbc.h
@@ -80,7 +80,7 @@ class BOTAN_DLL CBC_Encryption : public CBC_Mode
 class BOTAN_DLL CTS_Encryption final : public CBC_Encryption
    {
    public:
-      CTS_Encryption(BlockCipher* cipher) : CBC_Encryption(cipher, nullptr) {}
+      explicit CTS_Encryption(BlockCipher* cipher) : CBC_Encryption(cipher, nullptr) {}
 
       size_t output_length(size_t input_length) const override;
 
@@ -117,7 +117,7 @@ class BOTAN_DLL CBC_Decryption : public CBC_Mode
 class BOTAN_DLL CTS_Decryption final : public CBC_Decryption
    {
    public:
-      CTS_Decryption(BlockCipher* cipher) : CBC_Decryption(cipher, nullptr) {}
+      explicit CTS_Decryption(BlockCipher* cipher) : CBC_Decryption(cipher, nullptr) {}
 
       void finish(secure_vector<byte>& final_block, size_t offset = 0) override;
 
diff --git a/src/lib/modes/stream_mode.h b/src/lib/modes/stream_mode.h
index 5450bc37d..f5f1aa33a 100644
--- a/src/lib/modes/stream_mode.h
+++ b/src/lib/modes/stream_mode.h
@@ -15,7 +15,7 @@ namespace Botan {
 class BOTAN_DLL Stream_Cipher_Mode : public Cipher_Mode
    {
    public:
-      Stream_Cipher_Mode(StreamCipher* cipher) : m_cipher(cipher) {}
+      explicit Stream_Cipher_Mode(StreamCipher* cipher) : m_cipher(cipher) {}
 
       void update(secure_vector<byte>& buf, size_t offset) override
          {
diff --git a/src/lib/modes/xts/xts.h b/src/lib/modes/xts/xts.h
index 2df18e82f..e751b1644 100644
--- a/src/lib/modes/xts/xts.h
+++ b/src/lib/modes/xts/xts.h
@@ -33,7 +33,7 @@ class BOTAN_DLL XTS_Mode : public Cipher_Mode
 
       void clear() override;
    protected:
-      XTS_Mode(BlockCipher* cipher);
+      explicit XTS_Mode(BlockCipher* cipher);
 
       const byte* tweak() const { return m_tweak.data(); }
 
@@ -55,7 +55,7 @@ class BOTAN_DLL XTS_Mode : public Cipher_Mode
 class BOTAN_DLL XTS_Encryption final : public XTS_Mode
    {
    public:
-      XTS_Encryption(BlockCipher* cipher) : XTS_Mode(cipher) {}
+      explicit XTS_Encryption(BlockCipher* cipher) : XTS_Mode(cipher) {}
 
       void update(secure_vector<byte>& blocks, size_t offset = 0) override;
 
@@ -70,7 +70,7 @@ class BOTAN_DLL XTS_Encryption final : public XTS_Mode
 class BOTAN_DLL XTS_Decryption final : public XTS_Mode
    {
    public:
-      XTS_Decryption(BlockCipher* cipher) : XTS_Mode(cipher) {}
+      explicit XTS_Decryption(BlockCipher* cipher) : XTS_Mode(cipher) {}
 
       void update(secure_vector<byte>& blocks, size_t offset = 0) override;