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Fixup TinyCrypt PK wrap: Check TinyCrypt signature return code

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This commit is contained in:
Hanno Becker 2019-09-04 16:07:52 +01:00
parent 96d34d57ec
commit d2929b5626
1 changed files with 6 additions and 1 deletions
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7
library/pk_wrap.c
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@ -685,6 +685,7 @@ static int uecc_eckey_sign_wrap( void *ctx, mbedtls_md_type_t md_alg,
{
const mbedtls_uecc_keypair *keypair = (const mbedtls_uecc_keypair *) ctx;
const struct uECC_Curve_t * uecc_curve = uECC_secp256r1();
int ret;
/*
* RFC-4492 page 20:
@ -703,7 +704,11 @@ static int uecc_eckey_sign_wrap( void *ctx, mbedtls_md_type_t md_alg,
*/
#define MAX_SECP256R1_ECDSA_SIG_LEN ( 3 + 2 * ( 3 + NUM_ECC_BYTES ) )
uECC_sign( keypair->private_key, hash, hash_len, sig, uecc_curve );
ret = uECC_sign( keypair->private_key, hash, hash_len, sig, uecc_curve );
/* TinyCrypt uses 0 to signal errors. */
if( ret == 0 )
return( MBEDTLS_ERR_PK_HW_ACCEL_FAILED );
*sig_len = 2 * NUM_ECC_BYTES;
/* uECC owns its rng function pointer */