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This commit is contained in:
atul.jha 2020-08-13 15:58:23 +02:00
parent 90f9e7f5b7
commit 1ecaf19e8c
5 changed files with 25 additions and 21 deletions
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3
trial3/defines.h
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@ -46,7 +46,8 @@
/* SPECIFIC AND SPECIAL VALUES */ /* SPECIFIC AND SPECIAL VALUES */
/* DO NOT CHANGE THIS BLOCK */ /* DO NOT CHANGE THIS BLOCK */
#define IDENTITY "Identity"
#define ALIAS "Alias"
#define ACCUM_BUFF_OFFSET 2 #define ACCUM_BUFF_OFFSET 2
#define ENTROPY_LEN 32 #define ENTROPY_LEN 32

14
trial3/layer1.c
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@ -1,8 +1,6 @@
#include "layer1.h" #include "layer1.h"
#define IDENTITY "identity"
int readUDS(uint8_t* UDSdigest) int readUDS(uint8_t* UDSdigest)
{ {
//Read 8 bytes from RANDFILE //Read 8 bytes from RANDFILE
@ -245,7 +243,6 @@ int seedRNGSource(void *data, unsigned char *output, size_t len)
mbedtls_entropy_context * p_ent = data; mbedtls_entropy_context * p_ent = data;
printf("manual update entropy with CDI\n"); printf("manual update entropy with CDI\n");
printf("%d : len of buffer\n", (int)sizeof(p_ent -> accumulator.buffer) );
if(memcpy(output, p_ent -> accumulator.buffer + ACCUM_BUFF_OFFSET , ENTROPY_LEN) < 0) if(memcpy(output, p_ent -> accumulator.buffer + ACCUM_BUFF_OFFSET , ENTROPY_LEN) < 0)
return( MBEDTLS_ERR_ENTROPY_SOURCE_FAILED ); return( MBEDTLS_ERR_ENTROPY_SOURCE_FAILED );
@ -308,11 +305,8 @@ int deriveECCKeyPair(KeyDrv_context * KD_ctx)
mbedtls_entropy_add_source( &entropyCtx, use_dev_random, mbedtls_entropy_add_source( &entropyCtx, use_dev_random,
NULL, ENTROPY_LEN, MBEDTLS_ENTROPY_SOURCE_STRONG ); NULL, ENTROPY_LEN, MBEDTLS_ENTROPY_SOURCE_STRONG );
mbedtls_ctr_drbg_seed(&drbgCtx, mbedtls_entropy_func, mbedtls_ctr_drbg_seed(&drbgCtx, mbedtls_entropy_func, &entropyCtx,
&entropyCtx, (const unsigned char *) KD_ctx->phrase, strlen(KD_ctx->phrase) );
(const unsigned char *) KD_ctx->phrase ,
strlen(KD_ctx->phrase)
);
} }
else if (KD_ctx->ENT_MODE == DETERM) // Deterministic derviation with seed else if (KD_ctx->ENT_MODE == DETERM) // Deterministic derviation with seed
@ -337,9 +331,7 @@ int deriveECCKeyPair(KeyDrv_context * KD_ctx)
printf("Accumulating entropy ...\n"); printf("Accumulating entropy ...\n");
mbedtls_entropy_update_manual(&entropyCtx, KD_ctx->seed, ENTROPY_LEN); mbedtls_entropy_update_manual(&entropyCtx, KD_ctx->seed, ENTROPY_LEN);
mbedtls_ctr_drbg_seed(&drbgCtx, mbedtls_entropy_func, &entropyCtx, mbedtls_ctr_drbg_seed(&drbgCtx, mbedtls_entropy_func, &entropyCtx,
(const unsigned char *) KD_ctx->phrase , (const unsigned char *) KD_ctx->phrase, strlen(KD_ctx->phrase) );
strlen(KD_ctx->phrase)
);
} }
if(mbedtls_ecp_gen_keypair(&ecpGrp, &secret, &Public, if(mbedtls_ecp_gen_keypair(&ecpGrp, &secret, &Public,

3
trial3/layer2.h
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@ -19,9 +19,6 @@
//#include "defines.h" //#include "defines.h"
#define IDENTITY "Identity"
#define ALIAS "ALIAS"
void ROMprotocol(void); void ROMprotocol(void);

14
trial3/links.txt
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@ -24,3 +24,17 @@ https://forums.mbed.com/t/mbedtls-porting-into-new-environment-help-with-network
https://os.mbed.com/docs/mbed-os/v6.2/porting/entropy-sources.html https://os.mbed.com/docs/mbed-os/v6.2/porting/entropy-sources.html
https://tls.mbed.org/discussions/crypto-and-ssl/deterministic-random-bit-generator-help https://tls.mbed.org/discussions/crypto-and-ssl/deterministic-random-bit-generator-help
removing sensitive data rom RAM
https://stackoverflow.com/questions/42771298/explicitly-removing-sensitive-data-from-memory
compiler removes memset(,0,) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=8537

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trial3/out/main
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