diff options
Diffstat (limited to 'firmware/2lib/2rsa.c')
| -rw-r--r-- | firmware/2lib/2rsa.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/firmware/2lib/2rsa.c b/firmware/2lib/2rsa.c index 1a23d023..962558df 100644 --- a/firmware/2lib/2rsa.c +++ b/firmware/2lib/2rsa.c @@ -342,7 +342,7 @@ vb2_error_t vb2_rsa_verify_digest(const struct vb2_public_key *key, int sig_size; int pad_size; int exp; - vb2_error_t rv; + vb2_error_t rv = VB2_ERROR_EX_HWCRYPTO_UNSUPPORTED; if (!key || !sig || !digest) return VB2_ERROR_RSA_VERIFY_PARAM; @@ -367,7 +367,22 @@ vb2_error_t vb2_rsa_verify_digest(const struct vb2_public_key *key, return VB2_ERROR_RSA_VERIFY_WORKBUF; } - modpow(key, sig, workbuf32, exp); + if (key->allow_hwcrypto) { + rv = vb2ex_hwcrypto_modexp(key, sig, workbuf32, exp); + + if (rv == VB2_SUCCESS) + VB2_DEBUG("Using HW modexp engine for sig_alg %d\n", + key->sig_alg); + else + VB2_DEBUG("HW modexp for sig_alg %d not supported, using SW\n", + key->sig_alg); + } else { + VB2_DEBUG("HW modexp forbidden, using SW\n"); + } + + if (rv != VB2_SUCCESS) { + modpow(key, sig, workbuf32, exp); + } vb2_workbuf_free(&wblocal, 3 * key_bytes); |