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https://github.com/wolfSSL/wolfssl.git
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Allow use of FREESCALE hw RNG without a specific port
This commit is contained in:
Daniele Lacamera
@ -923,7 +923,7 @@ int wc_RNG_GenerateBlock(WC_RNG* rng, byte* output, word32 sz)
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return BAD_FUNC_ARG;
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if (sz == 0)
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return 0;
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return 0;
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#ifdef WOLF_CRYPTO_CB
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if (rng->devId != INVALID_DEVID) {
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@ -1798,131 +1798,135 @@ int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
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}
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#endif /* WOLFSSL_PIC32MZ_RNG */
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#elif defined(FREESCALE_K70_RNGA) || defined(FREESCALE_RNGA)
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/*
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* wc_Generates a RNG seed using the Random Number Generator Accelerator
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* on the Kinetis K70. Documentation located in Chapter 37 of
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* K70 Sub-Family Reference Manual (see Note 3 in the README for link).
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*/
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int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
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{
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word32 i;
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/* turn on RNGA module */
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#if defined(SIM_SCGC3_RNGA_MASK)
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SIM_SCGC3 |= SIM_SCGC3_RNGA_MASK;
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#endif
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#if defined(SIM_SCGC6_RNGA_MASK)
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/* additionally needed for at least K64F */
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SIM_SCGC6 |= SIM_SCGC6_RNGA_MASK;
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#endif
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/* set SLP bit to 0 - "RNGA is not in sleep mode" */
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RNG_CR &= ~RNG_CR_SLP_MASK;
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/* set HA bit to 1 - "security violations masked" */
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RNG_CR |= RNG_CR_HA_MASK;
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/* set GO bit to 1 - "output register loaded with data" */
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RNG_CR |= RNG_CR_GO_MASK;
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for (i = 0; i < sz; i++) {
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/* wait for RNG FIFO to be full */
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while((RNG_SR & RNG_SR_OREG_LVL(0xF)) == 0) {}
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/* get value */
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output[i] = RNG_OR;
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}
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return 0;
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}
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#elif defined(FREESCALE_K53_RNGB) || defined(FREESCALE_RNGB)
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/*
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* wc_Generates a RNG seed using the Random Number Generator (RNGB)
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* on the Kinetis K53. Documentation located in Chapter 33 of
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* K53 Sub-Family Reference Manual (see note in the README for link).
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*/
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int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
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{
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int i;
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/* turn on RNGB module */
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SIM_SCGC3 |= SIM_SCGC3_RNGB_MASK;
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/* reset RNGB */
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RNG_CMD |= RNG_CMD_SR_MASK;
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/* FIFO generate interrupt, return all zeros on underflow,
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* set auto reseed */
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RNG_CR |= (RNG_CR_FUFMOD_MASK | RNG_CR_AR_MASK);
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/* gen seed, clear interrupts, clear errors */
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RNG_CMD |= (RNG_CMD_GS_MASK | RNG_CMD_CI_MASK | RNG_CMD_CE_MASK);
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/* wait for seeding to complete */
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while ((RNG_SR & RNG_SR_SDN_MASK) == 0) {}
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for (i = 0; i < sz; i++) {
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/* wait for a word to be available from FIFO */
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while((RNG_SR & RNG_SR_FIFO_LVL_MASK) == 0) {}
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/* get value */
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output[i] = RNG_OUT;
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}
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return 0;
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}
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#elif defined(FREESCALE_KSDK_2_0_TRNG)
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#ifndef TRNG0
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#define TRNG0 TRNG
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#endif
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int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
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{
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status_t status;
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status = TRNG_GetRandomData(TRNG0, output, sz);
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if (status == kStatus_Success)
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{
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return(0);
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}
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else
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{
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return RAN_BLOCK_E;
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}
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}
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#elif defined(FREESCALE_KSDK_2_0_RNGA)
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int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
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{
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status_t status;
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status = RNGA_GetRandomData(RNG, output, sz);
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if (status == kStatus_Success)
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{
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return(0);
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}
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else
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{
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return RAN_BLOCK_E;
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}
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}
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#elif defined(FREESCALE_RNGA)
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int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
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{
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RNGA_DRV_GetRandomData(RNGA_INSTANCE, output, sz);
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return 0;
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}
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#elif defined(FREESCALE_MQX) || defined(FREESCALE_KSDK_MQX) || \
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defined(FREESCALE_KSDK_BM) || defined(FREESCALE_FREE_RTOS)
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#if defined(FREESCALE_K70_RNGA) || defined(FREESCALE_RNGA)
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/*
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* wc_Generates a RNG seed using the Random Number Generator Accelerator
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* on the Kinetis K70. Documentation located in Chapter 37 of
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* K70 Sub-Family Reference Manual (see Note 3 in the README for link).
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*/
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int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
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{
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word32 i;
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/* turn on RNGA module */
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#if defined(SIM_SCGC3_RNGA_MASK)
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SIM_SCGC3 |= SIM_SCGC3_RNGA_MASK;
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#endif
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#if defined(SIM_SCGC6_RNGA_MASK)
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/* additionally needed for at least K64F */
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SIM_SCGC6 |= SIM_SCGC6_RNGA_MASK;
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#endif
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/* set SLP bit to 0 - "RNGA is not in sleep mode" */
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RNG_CR &= ~RNG_CR_SLP_MASK;
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/* set HA bit to 1 - "security violations masked" */
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RNG_CR |= RNG_CR_HA_MASK;
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/* set GO bit to 1 - "output register loaded with data" */
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RNG_CR |= RNG_CR_GO_MASK;
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for (i = 0; i < sz; i++) {
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/* wait for RNG FIFO to be full */
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while((RNG_SR & RNG_SR_OREG_LVL(0xF)) == 0) {}
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/* get value */
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output[i] = RNG_OR;
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}
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return 0;
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}
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#elif defined(FREESCALE_K53_RNGB) || defined(FREESCALE_RNGB)
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/*
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* wc_Generates a RNG seed using the Random Number Generator (RNGB)
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* on the Kinetis K53. Documentation located in Chapter 33 of
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* K53 Sub-Family Reference Manual (see note in the README for link).
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*/
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int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
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{
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int i;
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/* turn on RNGB module */
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SIM_SCGC3 |= SIM_SCGC3_RNGB_MASK;
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/* reset RNGB */
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RNG_CMD |= RNG_CMD_SR_MASK;
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/* FIFO generate interrupt, return all zeros on underflow,
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* set auto reseed */
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RNG_CR |= (RNG_CR_FUFMOD_MASK | RNG_CR_AR_MASK);
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/* gen seed, clear interrupts, clear errors */
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RNG_CMD |= (RNG_CMD_GS_MASK | RNG_CMD_CI_MASK | RNG_CMD_CE_MASK);
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/* wait for seeding to complete */
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while ((RNG_SR & RNG_SR_SDN_MASK) == 0) {}
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for (i = 0; i < sz; i++) {
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/* wait for a word to be available from FIFO */
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while((RNG_SR & RNG_SR_FIFO_LVL_MASK) == 0) {}
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/* get value */
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output[i] = RNG_OUT;
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}
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return 0;
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}
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#elif defined(FREESCALE_KSDK_2_0_TRNG)
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int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
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{
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status_t status;
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status = TRNG_GetRandomData(TRNG0, output, sz);
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if (status == kStatus_Success)
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{
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return(0);
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}
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else
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{
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return RAN_BLOCK_E;
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}
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}
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#elif defined(FREESCALE_KSDK_2_0_RNGA)
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int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
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{
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status_t status;
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status = RNGA_GetRandomData(RNG, output, sz);
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if (status == kStatus_Success)
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{
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return(0);
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}
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else
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{
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return RAN_BLOCK_E;
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}
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}
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#elif defined(FREESCALE_RNGA)
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int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
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{
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RNGA_DRV_GetRandomData(RNGA_INSTANCE, output, sz);
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return 0;
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}
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#else
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#define USE_TEST_GENSEED
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#endif /* FREESCALE_K70_RNGA */
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defined(FREESCALE_KSDK_BM) || defined(FREESCALE_FREE_RTOS)
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/*
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* Fallback to USE_TEST_GENSEED if a FREESCALE platform did not match any
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* of the TRNG/RNGA/RNGB support
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*/
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#define USE_TEST_GENSEED
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#elif defined(WOLFSSL_SILABS_SE_ACCEL)
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int wc_GenerateSeed(OS_Seed* os, byte* output, word32 sz)
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