Port hash computation to cmCryptoHash

Avoid using KWSys MD5 or `cm_sha2` and use the `cmCryptoHash`
abstraction instead.

Source/CPack/WiX/cmCPackWIXGenerator.cxx

@@ -1060,8 +1060,8 @@ std::string cmCPackWIXGenerator::CreateNewIdForPath(std::string const& path)
 std::string cmCPackWIXGenerator::CreateHashedId(
   std::string const& path, std::string const& normalizedFilename)
 {
-  CM_AUTO_PTR<cmCryptoHash> sha1 = cmCryptoHash::New("SHA1");
-  std::string hash = sha1->HashString(path.c_str());
+  cmCryptoHash sha1(cmCryptoHash::AlgoSHA1);
+  std::string const hash = sha1.HashString(path);
 
   std::string identifier;
   identifier += hash.substr(0, 7) + "_";

Source/CTest/cmCTestLaunch.cxx

@@ -4,6 +4,7 @@
 
 #include <cmConfigure.h>
 
+#include "cmCryptoHash.h"
 #include "cmGeneratedFileStream.h"
 #include "cmGlobalGenerator.h"
 #include "cmMakefile.h"
@@ -14,7 +15,6 @@
 
 #include <cm_auto_ptr.hxx>
 #include <cmsys/FStream.hxx>
-#include <cmsys/MD5.h>
 #include <cmsys/Process.h>
 #include <cmsys/RegularExpression.hxx>
 #include <iostream>
@@ -167,17 +167,14 @@ void cmCTestLaunch::ComputeFileNames()
 
   // We hash the input command working dir and command line to obtain
   // a repeatable and (probably) unique name for log files.
-  char hash[32];
-  cmsysMD5* md5 = cmsysMD5_New();
-  cmsysMD5_Initialize(md5);
-  cmsysMD5_Append(md5, (unsigned char const*)(this->CWD.c_str()), -1);
+  cmCryptoHash md5(cmCryptoHash::AlgoMD5);
+  md5.Initialize();
+  md5.Append(this->CWD);
   for (std::vector<std::string>::const_iterator ai = this->RealArgs.begin();
        ai != this->RealArgs.end(); ++ai) {
-    cmsysMD5_Append(md5, (unsigned char const*)ai->c_str(), -1);
+    md5.Append(*ai);
   }
-  cmsysMD5_FinalizeHex(md5, hash);
-  cmsysMD5_Delete(md5);
-  this->LogHash.assign(hash, 32);
+  this->LogHash = md5.FinalizeHex();
 
   // We store stdout and stderr in temporary log files.
   this->LogOut = this->LogDir;

Source/cmFileCommand.cxx

@@ -2553,7 +2553,8 @@ bool cmFileCommand::HandleDownloadCommand(std::vector<std::string> const& args)
         this->SetError("DOWNLOAD missing sum value for EXPECTED_MD5.");
         return false;
       }
-      hash = CM_AUTO_PTR<cmCryptoHash>(cmCryptoHash::New("MD5"));
+      hash =
+        CM_AUTO_PTR<cmCryptoHash>(new cmCryptoHash(cmCryptoHash::AlgoMD5));
       hashMatchMSG = "MD5 sum";
       expectedHash = cmSystemTools::LowerCase(*i);
     } else if (*i == "SHOW_PROGRESS") {

Source/cmFilePathUuid.cxx

@@ -107,8 +107,8 @@ std::string cmFilePathUuid::GetChecksumString(
   {
     // Calculate the file ( seed + relative path + name ) checksum
     std::vector<unsigned char> hashBytes =
-      cmCryptoHash::New("SHA256")->ByteHashString(
-        sourceRelSeed + sourceRelPath + sourceFilename);
+      cmCryptoHash(cmCryptoHash::AlgoSHA256)
+        .ByteHashString(sourceRelSeed + sourceRelPath + sourceFilename);
 
     checksumBase32 =
       cmBase32Encoder().encodeString(&hashBytes[0], hashBytes.size(), false);

Source/cmGlobalGenerator.cxx

@@ -44,9 +44,9 @@
 #include <string.h>
 
 #if defined(CMAKE_BUILD_WITH_CMAKE)
+#include "cmCryptoHash.h"
 #include <cm_jsoncpp_value.h>
 #include <cm_jsoncpp_writer.h>
-#include <cmsys/MD5.h>
 #endif
 
 class cmInstalledFile;
@@ -2616,14 +2616,9 @@ void cmGlobalGenerator::AddRuleHash(const std::vector<std::string>& outputs,
   // Compute a hash of the rule.
   RuleHash hash;
   {
-    unsigned char const* data =
-      reinterpret_cast<unsigned char const*>(content.c_str());
-    int length = static_cast<int>(content.length());
-    cmsysMD5* sum = cmsysMD5_New();
-    cmsysMD5_Initialize(sum);
-    cmsysMD5_Append(sum, data, length);
-    cmsysMD5_FinalizeHex(sum, hash.Data);
-    cmsysMD5_Delete(sum);
+    cmCryptoHash md5(cmCryptoHash::AlgoMD5);
+    std::string const md5_hex = md5.HashString(content);
+    memcpy(hash.Data, md5_hex.c_str(), 32);
   }
 
   // Shorten the output name (in expected use case).

Source/cmLocalGenerator.cxx

@@ -26,7 +26,7 @@
 
 #if defined(CMAKE_BUILD_WITH_CMAKE)
 #define CM_LG_ENCODE_OBJECT_NAMES
-#include <cmsys/MD5.h>
+#include "cmCryptoHash.h"
 #endif
 
 #include <algorithm>
@@ -2001,17 +2001,6 @@ void cmLocalGenerator::GenerateTargetInstallRules(
 }
 
 #if defined(CM_LG_ENCODE_OBJECT_NAMES)
-static std::string cmLocalGeneratorMD5(const char* input)
-{
-  char md5out[32];
-  cmsysMD5* md5 = cmsysMD5_New();
-  cmsysMD5_Initialize(md5);
-  cmsysMD5_Append(md5, reinterpret_cast<unsigned char const*>(input), -1);
-  cmsysMD5_FinalizeHex(md5, md5out);
-  cmsysMD5_Delete(md5);
-  return std::string(md5out, 32);
-}
-
 static bool cmLocalGeneratorShortenObjectName(std::string& objName,
                                               std::string::size_type max_len)
 {
@@ -2020,7 +2009,8 @@ static bool cmLocalGeneratorShortenObjectName(std::string& objName,
   std::string::size_type pos =
     objName.find('/', objName.size() - max_len + 32);
   if (pos != objName.npos) {
-    std::string md5name = cmLocalGeneratorMD5(objName.substr(0, pos).c_str());
+    cmCryptoHash md5(cmCryptoHash::AlgoMD5);
+    std::string md5name = md5.HashString(objName.substr(0, pos));
     md5name += objName.substr(pos);
     objName = md5name;
 

Source/cmSystemTools.cxx

@@ -847,8 +847,8 @@ bool cmSystemTools::RenameFile(const char* oldname, const char* newname)
 bool cmSystemTools::ComputeFileMD5(const std::string& source, char* md5out)
 {
 #if defined(CMAKE_BUILD_WITH_CMAKE)
-  CM_AUTO_PTR<cmCryptoHash> md5 = cmCryptoHash::New("MD5");
-  std::string str = md5->HashFile(source);
+  cmCryptoHash md5(cmCryptoHash::AlgoMD5);
+  std::string const str = md5.HashFile(source);
   strncpy(md5out, str.c_str(), 32);
   return !str.empty();
 #else
@@ -863,8 +863,8 @@ bool cmSystemTools::ComputeFileMD5(const std::string& source, char* md5out)
 std::string cmSystemTools::ComputeStringMD5(const std::string& input)
 {
 #if defined(CMAKE_BUILD_WITH_CMAKE)
-  CM_AUTO_PTR<cmCryptoHash> md5 = cmCryptoHash::New("MD5");
-  return md5->HashString(input);
+  cmCryptoHash md5(cmCryptoHash::AlgoMD5);
+  return md5.HashString(input);
 #else
   (void)input;
   cmSystemTools::Message("md5sum not supported in bootstrapping mode",

Source/cmUuid.cxx

@@ -2,9 +2,8 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmUuid.h"
 
-#include "cm_sha2.h"
+#include "cmCryptoHash.h"
 
-#include <cmsys/MD5.h>
 #include <string.h>
 
 cmUuid::cmUuid()
@@ -22,16 +21,12 @@ std::string cmUuid::FromMd5(std::vector<unsigned char> const& uuidNamespace,
   std::vector<unsigned char> hashInput;
   this->CreateHashInput(uuidNamespace, name, hashInput);
 
-  cmsysMD5_s* md5 = cmsysMD5_New();
-  cmsysMD5_Initialize(md5);
-  cmsysMD5_Append(md5, &hashInput[0], int(hashInput.size()));
+  cmCryptoHash md5(cmCryptoHash::AlgoMD5);
+  md5.Initialize();
+  md5.Append(&hashInput[0], hashInput.size());
+  std::vector<unsigned char> digest = md5.Finalize();
 
-  unsigned char digest[16] = { 0 };
-  cmsysMD5_Finalize(md5, digest);
-
-  cmsysMD5_Delete(md5);
-
-  return this->FromDigest(digest, 3);
+  return this->FromDigest(&digest[0], 3);
 }
 
 std::string cmUuid::FromSha1(std::vector<unsigned char> const& uuidNamespace,
@@ -40,16 +35,12 @@ std::string cmUuid::FromSha1(std::vector<unsigned char> const& uuidNamespace,
   std::vector<unsigned char> hashInput;
   this->CreateHashInput(uuidNamespace, name, hashInput);
 
-  SHA_CTX* sha = new SHA_CTX;
-  SHA1_Init(sha);
-  SHA1_Update(sha, &hashInput[0], hashInput.size());
+  cmCryptoHash sha1(cmCryptoHash::AlgoSHA1);
+  sha1.Initialize();
+  sha1.Append(&hashInput[0], hashInput.size());
+  std::vector<unsigned char> digest = sha1.Finalize();
 
-  unsigned char digest[SHA1_DIGEST_LENGTH] = { 0 };
-  SHA1_Final(digest, sha);
-
-  delete sha;
-
-  return this->FromDigest(digest, 5);
+  return this->FromDigest(&digest[0], 5);
 }
 
 void cmUuid::CreateHashInput(std::vector<unsigned char> const& uuidNamespace,