diff options
Diffstat (limited to 'crypto/dh/dh_key.c')
| -rw-r--r-- | crypto/dh/dh_key.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/crypto/dh/dh_key.c b/crypto/dh/dh_key.c index 9e1d8e58225be..1d80fb2c5f600 100644 --- a/crypto/dh/dh_key.c +++ b/crypto/dh/dh_key.c @@ -94,6 +94,20 @@ int DH_compute_key(unsigned char *key, const BIGNUM *pub_key, DH *dh) return dh->meth->compute_key(key, pub_key, dh); } +int DH_compute_key_padded(unsigned char *key, const BIGNUM *pub_key, DH *dh) +{ + int rv, pad; + rv = dh->meth->compute_key(key, pub_key, dh); + if (rv <= 0) + return rv; + pad = BN_num_bytes(dh->p) - rv; + if (pad > 0) { + memmove(key + pad, key, rv); + memset(key, 0, pad); + } + return rv + pad; +} + static DH_METHOD dh_ossl = { "OpenSSL DH Method", generate_key, |