Digest.h

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#ifndef FWCore_Utilities_Digest_h
#define FWCore_Utilities_Digest_h
 
#include "md5.h"
 
#include <iosfwd>
#include <string>
 
namespace cms {
 
  struct MD5Result {
    // The default-constructed MD5Result is invalid; all others are
    // valid. The MD5 digest of the empty string is the value of the
    // default-constructed MD5Result.
    MD5Result();
 
    // This is the MD5 digest.
    unsigned char bytes[16];
 
    // Convert the digest to a printable string (the 'hexdigest')
    std::string toString() const;
 
    // The MD5 digest (not hexdigest) in string form
    // 'std::basic_string<char>', rather than
    // 'unsigned char [16]'
    std::string compactForm() const;
 
    // Set our data from the given hexdigest string.
    void fromHexifiedString(std::string const& s);
 
    bool isValid() const;
  };
 
  bool operator==(MD5Result const& a, MD5Result const& b);
  bool operator<(MD5Result const& a, MD5Result const& b);
 
  inline bool operator!=(MD5Result const& a, MD5Result const& b) { return !(a == b); }
 
  inline std::ostream& operator<<(std::ostream& os, MD5Result const& r) {
    os << r.toString();
    return os;
  }
 
  // Digest creates an MD5 digest of the given string. The digest can
  // be updated by using 'append'.
  class Digest {
  public:
    Digest();
    explicit Digest(std::string const& s);
 
    void append(std::string const& s);
    void append(const char* data, size_t size);
 
    MD5Result digest();
 
  private:
    md5_state_t state_;
  };
}  // namespace cms
 
#endif