HmacException.h

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#ifndef HMACEXCEPTION_H_
#define HMACEXCEPTION_H_

#include "LibCryptoSecException.h"

class HmacException : public LibCryptoSecException {

public:
    enum ErrorCode {
        UNKNOWN,
        CTX_INIT,
        CTX_UPDATE,
        CTX_FINISH,
        INVALID_ALGORITHM
    };

    HmacException(std::string where)
    {
        this->where = where;
        this->errorCode = HmacException::UNKNOWN;
    }

    HmacException(HmacException::ErrorCode errorCode, std::string where)
    {
        this->where = where;
        this->errorCode = errorCode;
    }

    ~HmacException()  throw () {}

    virtual std::string getMessage() const
    {
        return (HmacException::errorCode2Message(this->errorCode));
    }

    virtual std::string toString() const
    {
        std::string ret;
        if (this->errorCode == HmacException::UNKNOWN)
        {
            ret = "HmacException. Called by: " + this->where + ".";
        }
        else
        {
            ret = "HmacException: " + HmacException::errorCode2Message(this->errorCode) + ". Called by: " + this->where + ".";
        }
        return ret;
    }

    virtual HmacException::ErrorCode getErrorCode()
    {
        return this->errorCode;
    }

    static std::string errorCode2Message(HmacException::ErrorCode errorCode)
    {
        std::string ret;
        switch (errorCode)
        {
            case MessageDigestException::UNKNOWN:
                ret = "Unknown error";
                break;
            case MessageDigestException::INVALID_ALGORITHM:
                ret = "Invalid message digest algorithm";
                break;
            case MessageDigestException::CTX_INIT:
                ret = "Creating hmac context";
                break;
            case MessageDigestException::CTX_UPDATE:
                ret = "Updating hmac context";
                break;
            case MessageDigestException::CTX_FINISH:
                ret = "Finishing hmac context";
                break;
        }
        return ret;
    }

protected:
    HmacException::ErrorCode errorCode;

};

#endif