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all core functionality *works*

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This commit is contained in:
Conor Patrick
2018-07-11 21:55:20 -04:00
parent 156dc3163a
commit eaa7e15499
15 changed files with 850 additions and 63 deletions
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51
efm32/src/crypto.c
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@@ -33,6 +33,7 @@ static mbedtls_ctr_drbg_context ctr_drbg;
static const struct uECC_Curve_t * _es256_curve = NULL;
static const uint8_t * _signing_key = NULL;
static int _external_key_len = 0;
// Secrets for testing only
static uint8_t master_secret[32] = "\x00\x11\x22\x33\x44\x55\x66\x77\x88\x99\xaa\xbb\xcc\xdd\xee\xff"
@@ -182,11 +183,15 @@ void crypto_ecc256_init()
}
void crypto_ecc256_load_attestation_key()
void crypto_load_external_key(uint8_t * key, int len)
{
_signing_key = attestation_key;
_signing_key = key;
_external_key_len = len;
}
/**
* \brief Import a point from unsigned binary data
*
@@ -269,6 +274,48 @@ void crypto_ecc256_sign(uint8_t * data, int len, uint8_t * sig)
}
void crypto_ecdsa_sign(uint8_t * data, int len, uint8_t * sig, int MBEDTLS_ECP_ID)
{
mbedtls_ecp_group grp; /*!< Elliptic curve and base point */
mbedtls_mpi d; /*!< our secret value */
//#define CRYPTO_ENABLE CMU->HFBUSCLKEN0 |= CMU_HFBUSCLKEN0_CRYPTO; \
// CRYPTO->IFC = _CRYPTO_IFC_MASK; \
// CRYPTO->CMD = CRYPTO_CMD_SEQSTOP; \
// CRYPTO->CTRL = CRYPTO_CTRL_DMA0RSEL_DDATA0; \
// CRYPTO->SEQCTRL = 0; \
// CRYPTO->SEQCTRLB = 0
//
//#define CRYPTO_DISABLE \
// CRYPTO->IEN = 0; \
// CMU->HFBUSCLKEN0 &= ~CMU_HFBUSCLKEN0_CRYPTO;
// CRYPTO_DISABLE;
// CRYPTO_ENABLE;
// mbedtls_ecp_group_init( &grp );
// mbedtls_mpi_init( &d );
// mbedtls_ecp_group_load(&grp, MBEDTLS_ECP_DP_SECP256R1);
// mbedtls_mpi_read_binary(&d, _signing_key, 32);
//
// mbedtls_mpi r,s;
// mbedtls_mpi_init(&r);
// mbedtls_mpi_init(&s);
//
// printf("signing..\n");
// dump_hex(data,len);
// mbedtls_ecdsa_sign_det( &grp, &r, &s, &d,
// data, 32, MBEDTLS_MD_SHA256 );// Issue: this will freeze on 13th iteration..
// printf("signed\n");
//
// mbedtls_mpi_write_binary(&r,sig,32);
// mbedtls_mpi_write_binary(&s,sig+32,32);
if ( uECC_sign(_signing_key, data, len, sig, _es256_curve) == 0)
{
printf("error, uECC failed\n");
exit(1);
}
}
/*
* Generate a keypair with configurable base point
*/