From c3e4c9a25c2910d2d66d52215b3406b13d5b23d5 Mon Sep 17 00:00:00 2001 From: Yuval Adam Date: Sun, 29 Jun 2014 12:34:32 +0300 Subject: Add more board models --- .../tdes_cbc_decrypt/tdes_cbc_decrypt.c | 657 +++++++++++++++++++++ 1 file changed, 657 insertions(+) create mode 100644 boards/dk-tm4c129x/tdes_cbc_decrypt/tdes_cbc_decrypt.c (limited to 'boards/dk-tm4c129x/tdes_cbc_decrypt/tdes_cbc_decrypt.c') diff --git a/boards/dk-tm4c129x/tdes_cbc_decrypt/tdes_cbc_decrypt.c b/boards/dk-tm4c129x/tdes_cbc_decrypt/tdes_cbc_decrypt.c new file mode 100644 index 0000000..bcb575f --- /dev/null +++ b/boards/dk-tm4c129x/tdes_cbc_decrypt/tdes_cbc_decrypt.c @@ -0,0 +1,657 @@ +//***************************************************************************** +// +// tdes_cbc_decrypt.c - Simple TDES CBC decryption demo. +// +// Copyright (c) 2013-2014 Texas Instruments Incorporated. All rights reserved. +// Software License Agreement +// +// Texas Instruments (TI) is supplying this software for use solely and +// exclusively on TI's microcontroller products. The software is owned by +// TI and/or its suppliers, and is protected under applicable copyright +// laws. You may not combine this software with "viral" open-source +// software in order to form a larger program. +// +// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS. +// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT +// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY +// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL +// DAMAGES, FOR ANY REASON WHATSOEVER. +// +// This is part of revision 2.1.0.12573 of the DK-TM4C129X Firmware Package. +// +//***************************************************************************** + +#include +#include +#include "inc/hw_des.h" +#include "inc/hw_ints.h" +#include "inc/hw_memmap.h" +#include "driverlib/des.h" +#include "driverlib/debug.h" +#include "driverlib/fpu.h" +#include "driverlib/gpio.h" +#include "driverlib/interrupt.h" +#include "driverlib/pin_map.h" +#include "driverlib/rom.h" +#include "driverlib/rom_map.h" +#include "driverlib/sysctl.h" +#include "driverlib/uart.h" +#include "driverlib/udma.h" +#include "grlib/grlib.h" +#include "drivers/frame.h" +#include "drivers/kentec320x240x16_ssd2119.h" +#include "drivers/pinout.h" +#include "utils/uartstdio.h" + +//***************************************************************************** +// +//! \addtogroup example_list +//!

TDES CBC Decryption Demo (tdes_cbc_decrypt)

+//! +//! Simple demo showing an decryption operation using the DES module with +//! triple DES in CBC mode. A single block of data is decrypted at a time. +//! The module is also capable of performing in DES mode, but this has been +//! proven to be cryptographically insecure. CBC mode is also not recommended +//! because it will always produce the same ciphertext for a block of +//! plaintext. CBC and CFB modes are recommended instead. +//! +//! Please note that the use of interrupts and uDMA is not required for the +//! operation of the module. It is only done for demonstration purposes. +// +//***************************************************************************** + +//***************************************************************************** +// +// Configuration defines. +// +//***************************************************************************** +#define CCM_LOOP_TIMEOUT 500000 + +//***************************************************************************** +// +// The DMA control structure table. +// +//***************************************************************************** +#if defined(ewarm) +#pragma data_alignment=1024 +tDMAControlTable g_psDMAControlTable[64]; +#elif defined(ccs) +#pragma DATA_ALIGN(g_psDMAControlTable, 1024) +tDMAControlTable g_psDMAControlTable[64]; +#else +tDMAControlTable g_psDMAControlTable[64] __attribute__((aligned(1024))); +#endif + +//***************************************************************************** +// +// Triple DES test vector. +// The plaintext is from the AES example. The key was randomly generated. +// The resulting ciphertext was then generated using a Perl script with the +// Crypt::DES_EDE3 module. +// +//***************************************************************************** +uint32_t g_pui32TDESPlainText[16] = +{ + 0xe2bec16b, 0x969f402e, 0x117e3de9, 0x2a179373, + 0x578a2dae, 0x9cac031e, 0xac6fb79e, 0x518eaf45, + 0x461cc830, 0x11e45ca3, 0x19c1fbe5, 0xef520a1a, + 0x45249ff6, 0x179b4fdf, 0x7b412bad, 0x10376ce6 +}; + +uint32_t g_pui32TDESKey[6] = +{ + 0xc7f51c87, 0x8076211f, 0x5de5c871, 0xa243cf7e, + 0xd25fdb75, 0xad73068f +}; + +uint32_t g_pui32TDESIV[2] = +{ + 0x6d8ecac4, 0x3b27c885 +}; + +uint32_t g_pui32TDESCipherText[16] = +{ + 0x24c69385, 0xb338be54, 0x6eeeb276, 0x1a952b4e, + 0x7242ce4b, 0x9ec147cf, 0x765916ee, 0x3d25e685, + 0xfe5865b4, 0xf2238cb8, 0x2a5b68d5, 0x0f79a41a, + 0x6f4a7601, 0x7a57235f, 0xce84d08a, 0x1a34d011 +}; + +//***************************************************************************** +// +// The error routine that is called if the driver library encounters an error. +// +//***************************************************************************** +#ifdef DEBUG +void +__error__(char *pcFilename, uint32_t ui32Line) +{ +} +#endif + +//***************************************************************************** +// +// Round up length to nearest 8 byte boundary. This is needed because all +// two data registers must be written at once. This is handled in the DES +// driver, but if using uDMA, the length must rounded up. +// +//***************************************************************************** +uint32_t +LengthRoundUp(uint32_t ui32Length) +{ + uint32_t ui32Remainder; + + ui32Remainder = ui32Length % 8; + if(ui32Remainder == 0) + { + return(ui32Length); + } + else + { + return(ui32Length + (8 - ui32Remainder)); + } +} + +//***************************************************************************** +// +// The TDES interrupt handler and interrupt flags. +// +//***************************************************************************** +static volatile bool g_bContextInIntFlag; +static volatile bool g_bDataInIntFlag; +static volatile bool g_bDataOutIntFlag; +static volatile bool g_bContextInDMADoneIntFlag; +static volatile bool g_bDataInDMADoneIntFlag; +static volatile bool g_bDataOutDMADoneIntFlag; + +void +TDESIntHandler(void) +{ + uint32_t ui32IntStatus; + + // + // Read the DES masked interrupt status. + // + ui32IntStatus = ROM_DESIntStatus(DES_BASE, true); + + // + // Print a different message depending on the interrupt source. + // + if(ui32IntStatus & DES_INT_CONTEXT_IN) + { + ROM_DESIntDisable(DES_BASE, DES_INT_CONTEXT_IN); + g_bContextInIntFlag = true; + UARTprintf(" Context input registers are ready.\n"); + } + if(ui32IntStatus & DES_INT_DATA_IN) + { + ROM_DESIntDisable(DES_BASE, DES_INT_DATA_IN); + g_bDataInIntFlag = true; + UARTprintf(" Data FIFO is ready to receive data.\n"); + } + if(ui32IntStatus & DES_INT_DATA_OUT) + { + ROM_DESIntDisable(DES_BASE, DES_INT_DATA_OUT); + g_bDataOutIntFlag = true; + UARTprintf(" Data FIFO is ready to provide data.\n"); + } + if(ui32IntStatus & DES_INT_DMA_CONTEXT_IN) + { + ROM_DESIntClear(DES_BASE, DES_INT_DMA_CONTEXT_IN); + g_bContextInDMADoneIntFlag = true; + UARTprintf(" DMA completed a context write to the internal\n"); + UARTprintf(" registers.\n"); + } + if(ui32IntStatus & DES_INT_DMA_DATA_IN) + { + ROM_DESIntClear(DES_BASE, DES_INT_DMA_DATA_IN); + g_bDataInDMADoneIntFlag = true; + UARTprintf(" DMA has written the last word of input data to\n"); + UARTprintf(" the internal FIFO of the engine.\n"); + } + if(ui32IntStatus & DES_INT_DMA_DATA_OUT) + { + ROM_DESIntClear(DES_BASE, DES_INT_DMA_DATA_OUT); + g_bDataOutDMADoneIntFlag = true; + UARTprintf(" DMA has written the last word of process result.\n"); + } +} + +//***************************************************************************** +// +// Perform an decryption operation. +// +//***************************************************************************** +bool +TDESCBCDecrypt(uint32_t *pui32Src, uint32_t *pui32Dst, uint32_t *pui32Key, + uint32_t ui32Length, uint32_t *pui32IV, bool bUseDMA) +{ + // + // Perform a soft reset. + // + ROM_DESReset(DES_BASE); + + // + // Clear the interrupt flags. + // + g_bContextInIntFlag = false; + g_bDataInIntFlag = false; + g_bDataOutIntFlag = false; + g_bContextInDMADoneIntFlag = false; + g_bDataInDMADoneIntFlag = false; + g_bDataOutDMADoneIntFlag = false; + + // + // Enable all interrupts. + // + ROM_DESIntEnable(DES_BASE, (DES_INT_CONTEXT_IN | + DES_INT_DATA_IN | DES_INT_DATA_OUT)); + + // + // Configure the DES module. + // + ROM_DESConfigSet(DES_BASE, (DES_CFG_DIR_DECRYPT | DES_CFG_TRIPLE | + DES_CFG_MODE_CBC)); + + // + // Write the key. + // + ROM_DESKeySet(DES_BASE, pui32Key); + + // + // Write the IV. + // + ROM_DESIVSet(DES_BASE, pui32IV); + + // + // Depending on the argument, perform the decryption + // with or without uDMA. + // + if(bUseDMA) + { + // + // Enable DMA interrupts. + // + ROM_DESIntEnable(DES_BASE, (DES_INT_DMA_CONTEXT_IN | + DES_INT_DMA_DATA_IN | + DES_INT_DMA_DATA_OUT)); + + // + // Setup the DMA module to copy data in. + // + ROM_uDMAChannelAssign(UDMA_CH21_DES0DIN); + ROM_uDMAChannelAttributeDisable(UDMA_CH21_DES0DIN, + UDMA_ATTR_ALTSELECT | + UDMA_ATTR_USEBURST | + UDMA_ATTR_HIGH_PRIORITY | + UDMA_ATTR_REQMASK); + ROM_uDMAChannelControlSet(UDMA_CH21_DES0DIN | UDMA_PRI_SELECT, + UDMA_SIZE_32 | UDMA_SRC_INC_32 | + UDMA_DST_INC_NONE | UDMA_ARB_2 | + UDMA_DST_PROT_PRIV); + ROM_uDMAChannelTransferSet(UDMA_CH21_DES0DIN | UDMA_PRI_SELECT, + UDMA_MODE_BASIC, (void *)pui32Src, + (void *)(DES_BASE + DES_O_DATA_L), + LengthRoundUp(ui32Length) / 4); + UARTprintf("Data in DMA request enabled.\n"); + + // + // Setup the DMA module to copy the data out. + // + ROM_uDMAChannelAssign(UDMA_CH22_DES0DOUT); + ROM_uDMAChannelAttributeDisable(UDMA_CH22_DES0DOUT, + UDMA_ATTR_ALTSELECT | + UDMA_ATTR_USEBURST | + UDMA_ATTR_HIGH_PRIORITY | + UDMA_ATTR_REQMASK); + ROM_uDMAChannelControlSet(UDMA_CH22_DES0DOUT | UDMA_PRI_SELECT, + UDMA_SIZE_32 | UDMA_SRC_INC_NONE | + UDMA_DST_INC_32 | UDMA_ARB_2 | + UDMA_SRC_PROT_PRIV); + ROM_uDMAChannelTransferSet(UDMA_CH22_DES0DOUT | UDMA_PRI_SELECT, + UDMA_MODE_BASIC, + (void *)(DES_BASE + DES_O_DATA_L), + (void *)pui32Dst, + LengthRoundUp(ui32Length) / 4); + UARTprintf("Data out DMA request enabled.\n"); + + // + // Enable DMA requests + // + ROM_DESDMAEnable(DES_BASE, DES_DMA_DATA_IN | DES_DMA_DATA_OUT); + + // + // Write the length registers to start the process. + // + ROM_DESLengthSet(DES_BASE, ui32Length); + + // + // Enable the DMA channels to start the transfers. This must be done after + // writing the length to prevent data from copying before the context is + // truly ready. + // + ROM_uDMAChannelEnable(UDMA_CH21_DES0DIN); + ROM_uDMAChannelEnable(UDMA_CH22_DES0DOUT); + + // + // Wait for the data in DMA done interrupt. + // + while(!g_bDataInDMADoneIntFlag) + { + } + + // + // Wait for the data out DMA done interrupt. + // + while(!g_bDataOutDMADoneIntFlag) + { + } + } + else + { + // + // Perform the decryption. + // + ROM_DESDataProcess(DES_BASE, pui32Src, pui32Dst, ui32Length); + } + + return(true); +} + +//***************************************************************************** +// +// Initialize the DES and CCM modules. +// +//***************************************************************************** +bool +DESInit(void) +{ + uint32_t ui32Loop; + + // + // Check that the CCM peripheral is present. + // + if(!ROM_SysCtlPeripheralPresent(SYSCTL_PERIPH_CCM0)) + { + UARTprintf("No CCM peripheral found!\n"); + + // + // Return failure. + // + return(false); + } + + // + // The hardware is available, enable it. + // + ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_CCM0); + + // + // Wait for the peripheral to be ready. + // + ui32Loop = 0; + while(!ROM_SysCtlPeripheralReady(SYSCTL_PERIPH_CCM0)) + { + // + // Increment our poll counter. + // + ui32Loop++; + + if(ui32Loop > CCM_LOOP_TIMEOUT) + { + // + // Timed out, notify and spin. + // + UARTprintf("Time out on CCM ready after enable.\n"); + + // + // Return failure. + // + return(false); + } + } + + // + // Reset the peripheral to ensure we are starting from a known condition. + // + ROM_SysCtlPeripheralReset(SYSCTL_PERIPH_CCM0); + + // + // Wait for the peripheral to be ready again. + // + ui32Loop = 0; + while(!ROM_SysCtlPeripheralReady(SYSCTL_PERIPH_CCM0)) + { + // + // Increment our poll counter. + // + ui32Loop++; + + if(ui32Loop > CCM_LOOP_TIMEOUT) + { + // + // Timed out, spin. + // + UARTprintf("Time out on CCM ready after reset.\n"); + + // + // Return failure. + // + return(false); + } + } + + // + // Return initialization success. + // + return(true); +} + +//***************************************************************************** +// +// Configure the UART and its pins. This must be called before UARTprintf(). +// +//***************************************************************************** +void +ConfigureUART(void) +{ + // + // Enable the GPIO Peripheral used by the UART. + // + ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA); + + // + // Enable UART0 + // + ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0); + + // + // Configure GPIO Pins for UART mode. + // + ROM_GPIOPinConfigure(GPIO_PA0_U0RX); + ROM_GPIOPinConfigure(GPIO_PA1_U0TX); + ROM_GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1); + + // + // Use the internal 16MHz oscillator as the UART clock source. + // + ROM_UARTClockSourceSet(UART0_BASE, UART_CLOCK_PIOSC); + + // + // Initialize the UART for console I/O. + // + UARTStdioConfig(0, 115200, 16000000); +} + +//***************************************************************************** +// +// This example decrypts blocks of plaintext using TDES in CBC mode. It +// does the decryption first without uDMA and then with uDMA. The results +// are checked after each operation. +// +//***************************************************************************** +int +main(void) +{ + uint32_t pui32PlainText[16], ui32Errors, ui32Idx, ui32SysClock; + tContext sContext; + + // + // Run from the PLL at 120 MHz. + // + ui32SysClock = MAP_SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ | + SYSCTL_OSC_MAIN | SYSCTL_USE_PLL | + SYSCTL_CFG_VCO_480), 120000000); + + // + // Configure the device pins. + // + PinoutSet(); + + // + // Initialize the display driver. + // + Kentec320x240x16_SSD2119Init(ui32SysClock); + + // + // Initialize the graphics context. + // + GrContextInit(&sContext, &g_sKentec320x240x16_SSD2119); + + // + // Draw the application frame. + // + FrameDraw(&sContext, "tdes-cbc-decrypt"); + + // + // Show some instructions on the display + // + GrContextFontSet(&sContext, g_psFontCm20); + GrContextForegroundSet(&sContext, ClrWhite); + GrStringDrawCentered(&sContext, "Connect a terminal to", -1, + GrContextDpyWidthGet(&sContext) / 2, 60, false); + GrStringDrawCentered(&sContext, "UART0 (115200,N,8,1)", -1, + GrContextDpyWidthGet(&sContext) / 2, 80, false); + GrStringDrawCentered(&sContext, "for more information.", -1, + GrContextDpyWidthGet(&sContext) / 2, 100, false); + + // + // Initialize local variables. + // + ui32Errors = 0; + for(ui32Idx = 0; ui32Idx < 16; ui32Idx++) + { + pui32PlainText[ui32Idx] = 0; + } + + // + // Enable stacking for interrupt handlers. This allows floating-point + // instructions to be used within interrupt handlers, but at the expense of + // extra stack usage. + // + ROM_FPUStackingEnable(); + + // + // Enable DES interrupts. + // + ROM_IntEnable(INT_DES0); + + // + // Enable debug output on UART0 and print a welcome message. + // + ConfigureUART(); + UARTprintf("Starting TDES CBC decryption demo.\n"); + GrStringDrawCentered(&sContext, "Starting demo...", -1, + GrContextDpyWidthGet(&sContext) / 2, 140, false); + + // + // Enable the uDMA module. + // + ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_UDMA); + + // + // Setup the control table. + // + ROM_uDMAEnable(); + ROM_uDMAControlBaseSet(g_psDMAControlTable); + + // + // Initialize the CCM and DES modules. + // + if(!DESInit()) + { + UARTprintf("Initialization of the DES module failed.\n"); + ui32Errors |= 0x00000001; + } + + // + // Perform the decryption without uDMA. + // + UARTprintf("Performing decryption without uDMA.\n"); + TDESCBCDecrypt(g_pui32TDESCipherText, pui32PlainText, g_pui32TDESKey, + 64, g_pui32TDESIV, false); + + // + // Check the result. + // + for(ui32Idx = 0; ui32Idx < 16; ui32Idx++) + { + if(pui32PlainText[ui32Idx] != g_pui32TDESPlainText[ui32Idx]) + { + UARTprintf("Plaintext mismatch on word %d. Exp: 0x%x, Act: " + "0x%x\n", ui32Idx, g_pui32TDESPlainText[ui32Idx], + pui32PlainText[ui32Idx]); + ui32Errors |= (ui32Idx << 16) | 0x00000002; + } + } + + // + // Clear the array containing the plaintext. + // + for(ui32Idx = 0; ui32Idx < 16; ui32Idx++) + { + pui32PlainText[ui32Idx] = 0; + } + + // + // Perform the decryption with uDMA. + // + UARTprintf("Performing decryption with uDMA.\n"); + TDESCBCDecrypt(g_pui32TDESCipherText, pui32PlainText, g_pui32TDESKey, + 64, g_pui32TDESIV, true); + + // + // Check the result. + // + for(ui32Idx = 0; ui32Idx < 16; ui32Idx++) + { + if(pui32PlainText[ui32Idx] != g_pui32TDESPlainText[ui32Idx]) + { + UARTprintf("Plaintext mismatch on word %d. Exp: 0x%x, Act: " + "0x%x\n", ui32Idx, g_pui32TDESPlainText[ui32Idx], + pui32PlainText[ui32Idx]); + ui32Errors |= (ui32Idx << 16) | 0x00000004; + } + } + + // + // Finished. + // + if(ui32Errors) + { + UARTprintf("Demo failed with error code 0x%x.\n", ui32Errors); + GrStringDrawCentered(&sContext, "Demo failed.", -1, + GrContextDpyWidthGet(&sContext) / 2, 180, false); + } + else + { + UARTprintf("Demo completed successfully.\n"); + GrStringDrawCentered(&sContext, "Demo passed.", -1, + GrContextDpyWidthGet(&sContext) / 2, 180, false); + } + + while(1) + { + } +} -- cgit v1.3.1