C++ (Cpp) wc_HmacFinal Beispiele

Beispiel #1

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Datei: crypto.c Projekt: agnov8/wolfssl

/* Get HMAC Final into digest */
int CRYPT_HMAC_Finalize(CRYPT_HMAC_CTX* hmac, unsigned char* digest)
{
    if (hmac == NULL || digest == NULL)
        return BAD_FUNC_ARG;

    return wc_HmacFinal((Hmac*)hmac, digest);
}

Beispiel #2

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Datei: hmac.c Projekt: NickolasLapp/wolfssl

    /* HMAC-KDF-Extract.
     * RFC 5869 - HMAC-based Extract-and-Expand Key Derivation Function (HKDF).
     *
     * type     The hash algorithm type.
     * salt     The optional salt value.
     * saltSz   The size of the salt.
     * inKey    The input keying material.
     * inKeySz  The size of the input keying material.
     * out      The pseudorandom key with the length that of the hash.
     * returns 0 on success, otherwise failure.
     */
    int wc_HKDF_Extract(int type, const byte* salt, word32 saltSz,
                        const byte* inKey, word32 inKeySz, byte* out)
    {
        byte   tmp[MAX_DIGEST_SIZE]; /* localSalt helper */
        Hmac   myHmac;
        int    ret;
        const  byte* localSalt;  /* either points to user input or tmp */
        int    hashSz;

        ret = wc_HmacSizeByType(type);
        if (ret < 0)
            return ret;

        hashSz = ret;
        localSalt = salt;
        if (localSalt == NULL) {
            XMEMSET(tmp, 0, hashSz);
            localSalt = tmp;
            saltSz    = hashSz;
        }

        ret = wc_HmacSetKey(&myHmac, type, localSalt, saltSz);
        if (ret == 0)
            ret = wc_HmacUpdate(&myHmac, inKey, inKeySz);
        if (ret == 0)
            ret = wc_HmacFinal(&myHmac,  out);

        return ret;
    }

Beispiel #3

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Datei: hmac.c Projekt: kaleb-himes/wolfssl

    /* HMAC-KDF-Expand.
     * RFC 5869 - HMAC-based Extract-and-Expand Key Derivation Function (HKDF).
     *
     * type     The hash algorithm type.
     * inKey    The input key.
     * inKeySz  The size of the input key.
     * info     The application specific information.
     * infoSz   The size of the application specific information.
     * out      The output keying material.
     * returns 0 on success, otherwise failure.
     */
    int wc_HKDF_Expand(int type, const byte* inKey, word32 inKeySz,
                       const byte* info, word32 infoSz, byte* out, word32 outSz)
    {
        byte   tmp[WC_MAX_DIGEST_SIZE];
        Hmac   myHmac;
        int    ret = 0;
        word32 outIdx = 0;
        word32 hashSz = wc_HmacSizeByType(type);
        byte   n = 0x1;

        ret = wc_HmacInit(&myHmac, NULL, INVALID_DEVID);
        if (ret != 0)
            return ret;

        while (outIdx < outSz) {
            int    tmpSz = (n == 1) ? 0 : hashSz;
            word32 left = outSz - outIdx;

            ret = wc_HmacSetKey(&myHmac, type, inKey, inKeySz);
            if (ret != 0)
                break;
            ret = wc_HmacUpdate(&myHmac, tmp, tmpSz);
            if (ret != 0)
                break;
            ret = wc_HmacUpdate(&myHmac, info, infoSz);
            if (ret != 0)
                break;
            ret = wc_HmacUpdate(&myHmac, &n, 1);
            if (ret != 0)
                break;
            ret = wc_HmacFinal(&myHmac, tmp);
            if (ret != 0)
                break;

            left = min(left, hashSz);
            XMEMCPY(out+outIdx, tmp, left);

            outIdx += hashSz;
            n++;
        }

        wc_HmacFree(&myHmac);

        return ret;
    }

Beispiel #4

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Datei: pwdbased.c Projekt: shihrer/wolfssl

int wc_PBKDF2(byte* output, const byte* passwd, int pLen, const byte* salt,
           int sLen, int iterations, int kLen, int hashType)
{
    word32 i = 1;
    int    hLen;
    int    j, ret;
    Hmac   hmac;
#ifdef WOLFSSL_SMALL_STACK
    byte*  buffer;
#else
    byte   buffer[MAX_DIGEST_SIZE];
#endif

    hLen = GetDigestSize(hashType);
    if (hLen < 0)
        return BAD_FUNC_ARG;

#ifdef WOLFSSL_SMALL_STACK
    buffer = (byte*)XMALLOC(MAX_DIGEST_SIZE, NULL, DYNAMIC_TYPE_TMP_BUFFER);
    if (buffer == NULL)
        return MEMORY_E;
#endif

    ret = wc_HmacSetKey(&hmac, hashType, passwd, pLen);

    if (ret == 0) {
        while (kLen) {
            int currentLen;

            ret = wc_HmacUpdate(&hmac, salt, sLen);
            if (ret != 0)
                break;

            /* encode i */
            for (j = 0; j < 4; j++) {
                byte b = (byte)(i >> ((3-j) * 8));

                ret = wc_HmacUpdate(&hmac, &b, 1);
                if (ret != 0)
                    break;
            }

            /* check ret from inside for loop */
            if (ret != 0)
                break;

            ret = wc_HmacFinal(&hmac, buffer);
            if (ret != 0)
                break;

            currentLen = min(kLen, hLen);
            XMEMCPY(output, buffer, currentLen);

            for (j = 1; j < iterations; j++) {
                ret = wc_HmacUpdate(&hmac, buffer, hLen);
                if (ret != 0)
                    break;
                ret = wc_HmacFinal(&hmac, buffer);
                if (ret != 0)
                    break;
                xorbuf(output, buffer, currentLen);
            }

            /* check ret from inside for loop */
            if (ret != 0)
                break;

            output += currentLen;
            kLen   -= currentLen;
            i++;
        }
    }

#ifdef WOLFSSL_SMALL_STACK
    XFREE(buffer, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif

    return ret;
}

Beispiel #5

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