diff options
| -rw-r--r-- | chip/g/dcrypto/dcrypto_bn.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/chip/g/dcrypto/dcrypto_bn.c b/chip/g/dcrypto/dcrypto_bn.c index b8f8fef4f4..76801773b0 100644 --- a/chip/g/dcrypto/dcrypto_bn.c +++ b/chip/g/dcrypto/dcrypto_bn.c @@ -1275,6 +1275,8 @@ int dcrypto_modexp_blinded(struct LITE_BIGNUM *output, uint32_t r_buf[RSA_MAX_WORDS]; uint32_t rinv_buf[RSA_MAX_WORDS]; + uint32_t rx[2]; + struct LITE_BIGNUM r; struct LITE_BIGNUM rinv; @@ -1302,7 +1304,10 @@ int dcrypto_modexp_blinded(struct LITE_BIGNUM *output, result = setup_and_lock(N, input); /* Pick !0 64-bit random for exponent blinding */ - rand64(ctx->rnd); + rand64(rx); + ctx->rnd[0] = rx[0]; + ctx->rnd[1] = rx[1]; + ctx->pubexp = pubexp; ctx->_pad1[0] = ctx->_pad1[1] = ctx->_pad1[2] = 0; |