static AzureIoTResult_t prvSplitJWS()

in ports/mbedTLS/azure_iot_jws_mbedtls.c [87:140]
47 lines of code
8 McCabe index (conditional complexity)

static AzureIoTResult_t prvSplitJWS( uint8_t * pucJWS,
                                     uint32_t ulJWSLength,
                                     uint8_t ** ppucHeader,
                                     uint32_t * pulHeaderLength,
                                     uint8_t ** ppucPayload,
                                     uint32_t * pulPayloadLength,
                                     uint8_t ** ppucSignature,
                                     uint32_t * pulSignatureLength )
{
    uint8_t * pucFirstDot;
    uint8_t * pucSecondDot;
    uint32_t ulDotCount = 0;
    uint32_t ulIndex = 0;

    *ppucHeader = pucJWS;

    while( ulIndex < ulJWSLength )
    {
        if( *pucJWS == '.' )
        {
            ulDotCount++;

            if( ulDotCount == 1 )
            {
                pucFirstDot = pucJWS;
            }
            else if( ulDotCount == 2 )
            {
                pucSecondDot = pucJWS;
            }
            else if( ulDotCount > 2 )
            {
                AZLogError( ( "JWS had more '.' than required (2)" ) );
                return eAzureIoTErrorFailed;
            }
        }

        pucJWS++;
        ulIndex++;
    }

    if( ( ulDotCount != 2 ) || ( pucSecondDot >= ( *ppucHeader + ulJWSLength - 1 ) ) )
    {
        return eAzureIoTErrorFailed;
    }

    *pulHeaderLength = pucFirstDot - *ppucHeader;
    *ppucPayload = pucFirstDot + 1;
    *pulPayloadLength = pucSecondDot - *ppucPayload;
    *ppucSignature = pucSecondDot + 1;
    *pulSignatureLength = *ppucHeader + ulJWSLength - *ppucSignature;

    return eAzureIoTSuccess;
}