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| author | Dr. Stephen Henson <steve@openssl.org> | 2011-03-08 19:07:26 +0000 |
|---|---|---|
| committer | Dr. Stephen Henson <steve@openssl.org> | 2011-03-08 19:07:26 +0000 |
| commit | bc91494e064ebdcff68f987947f97e404fbca0b5 (patch) | |
| tree | a2cdc113e234f0886918d9b1e43e4132f1569661 /crypto/dh/dh_key.c | |
| parent | a1e7883edb9041aff44700fc9817891c800ac703 (diff) | |
| download | openssl-bc91494e064ebdcff68f987947f97e404fbca0b5.tar.gz | |
New SP 800-56A compliant version of DH_compute_key().
Diffstat (limited to 'crypto/dh/dh_key.c')
| -rw-r--r-- | crypto/dh/dh_key.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/crypto/dh/dh_key.c b/crypto/dh/dh_key.c index bba83be312..6c7a457267 100644 --- a/crypto/dh/dh_key.c +++ b/crypto/dh/dh_key.c @@ -86,6 +86,21 @@ 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, |