5 files changed, 11 insertions, 7 deletions
diff --git a/src/block/aes/aes.cpp b/src/block/aes/aes.cpp
index b19699dbc..d510a4a24 100644
--- a/src/block/aes/aes.cpp
+++ b/src/block/aes/aes.cpp
@@ -616,7 +616,7 @@ void aes_key_schedule(const byte key[], size_t length,
       0x01000000, 0x02000000, 0x04000000, 0x08000000, 0x10000000,
       0x20000000, 0x40000000, 0x80000000, 0x1B000000, 0x36000000 };
 
-   const u32bit rounds = (length / 4) + 6;
+   const size_t rounds = (length / 4) + 6;
 
    SecureVector<u32bit> XEK(length + 32), XDK(length + 32);
 
diff --git a/src/hash/gost_3411/gost_3411.cpp b/src/hash/gost_3411/gost_3411.cpp
index 075f26889..c0f39da47 100644
--- a/src/hash/gost_3411/gost_3411.cpp
+++ b/src/hash/gost_3411/gost_3411.cpp
@@ -71,7 +71,7 @@ void GOST_34_11::compress_n(const byte input[], size_t blocks)
    {
    for(size_t i = 0; i != blocks; ++i)
       {
-      for(size_t j = 0, carry = 0; j != 32; ++j)
+      for(u16bit j = 0, carry = 0; j != 32; ++j)
          {
          u16bit s = sum[j] + input[32*i+j] + carry;
          carry = get_byte(0, s);
diff --git a/src/hash/keccak/keccak.cpp b/src/hash/keccak/keccak.cpp
index 37fdc0d86..841c8875d 100644
--- a/src/hash/keccak/keccak.cpp
+++ b/src/hash/keccak/keccak.cpp
@@ -104,7 +104,7 @@ void keccak_f_1600(u64bit A[25])
 Keccak_1600::Keccak_1600(size_t output_bits) :
    output_bits(output_bits),
    bitrate(1600 - 2*output_bits),
-   diversifier(output_bits / 8),
+   diversifier(static_cast<byte>(output_bits / 8)),
    S(25),
    S_pos(0)
    {
@@ -179,7 +179,10 @@ void Keccak_1600::add_data(const byte input[], size_t length)
 
 void Keccak_1600::final_result(byte output[])
    {
-   const byte padding[4] = { 0x01, diversifier, bitrate / 8, 0x01 };
+   const byte padding[4] = { 0x01,
+                             diversifier,
+                             static_cast<byte>(bitrate / 8),
+                             0x01 };
 
    add_data(padding, sizeof(padding));
 
diff --git a/src/hash/md2/md2.cpp b/src/hash/md2/md2.cpp
index 195c0843e..761528dc6 100644
--- a/src/hash/md2/md2.cpp
+++ b/src/hash/md2/md2.cpp
@@ -52,7 +52,8 @@ void MD2::hash(const byte input[])
          T = X[k+4] ^= SBOX[T]; T = X[k+5] ^= SBOX[T];
          T = X[k+6] ^= SBOX[T]; T = X[k+7] ^= SBOX[T];
          }
-      T += i;
+
+      T += static_cast<byte>(i);
       }
 
    T = checksum[15];
diff --git a/src/math/numbertheory/point_gfp.cpp b/src/math/numbertheory/point_gfp.cpp
index 5e42e37a5..fab731d29 100644
--- a/src/math/numbertheory/point_gfp.cpp
+++ b/src/math/numbertheory/point_gfp.cpp
@@ -486,7 +486,7 @@ SecureVector<byte> EC2OSP(const PointGFp& point, byte format)
    else if(format == PointGFp::COMPRESSED)
       {
       SecureVector<byte> result;
-      result.push_back(0x02 | y.get_bit(0));
+      result.push_back(0x02 | static_cast<byte>(y.get_bit(0)));
 
       result += bX;
 
@@ -495,7 +495,7 @@ SecureVector<byte> EC2OSP(const PointGFp& point, byte format)
    else if(format == PointGFp::HYBRID)
       {
       SecureVector<byte> result;
-      result.push_back(0x06 | y.get_bit(0));
+      result.push_back(0x06 | static_cast<byte>(y.get_bit(0)));
 
       result += bX;
       result += bY;