diff options
Diffstat (limited to 'crypto/dh/dh_backend.c')
| -rw-r--r-- | crypto/dh/dh_backend.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/crypto/dh/dh_backend.c b/crypto/dh/dh_backend.c index 97f5271a5a..aebb38d1c9 100644 --- a/crypto/dh/dh_backend.c +++ b/crypto/dh/dh_backend.c @@ -17,6 +17,7 @@ #include <openssl/core_names.h> #include "internal/param_build_set.h" #include "crypto/dh.h" +#include "dh_local.h" /* * The intention with the "backend" source file is to offer backend functions @@ -117,6 +118,49 @@ int ossl_dh_key_todata(DH *dh, OSSL_PARAM_BLD *bld, OSSL_PARAM params[]) return 1; } +static ossl_inline int dh_bn_dup_check(BIGNUM **out, const BIGNUM *f) +{ + if (f != NULL && (*out = BN_dup(f)) == NULL) + return 0; + return 1; +} + +DH *ossl_dh_dup(const DH *dh) +{ + DH *dupkey = NULL; + +#ifndef FIPS_MODULE + /* Do not try to duplicate foreign DH keys */ + if (ossl_dh_get_method(dh) != DH_OpenSSL()) + return NULL; +#endif + + if ((dupkey = ossl_dh_new_ex(dh->libctx)) == NULL) + return NULL; + + dupkey->length = DH_get_length(dh); + if (!ossl_ffc_params_copy(&dupkey->params, &dh->params)) + goto err; + + dupkey->flags = dh->flags; + + if (!dh_bn_dup_check(&dupkey->pub_key, dh->pub_key)) + goto err; + if (!dh_bn_dup_check(&dupkey->priv_key, dh->priv_key)) + goto err; + +#ifndef FIPS_MODULE + if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_DH, + &dupkey->ex_data, &dh->ex_data)) + goto err; +#endif + + return dupkey; + + err: + DH_free(dupkey); + return NULL; +} #ifndef FIPS_MODULE DH *ossl_dh_key_from_pkcs8(const PKCS8_PRIV_KEY_INFO *p8inf, OSSL_LIB_CTX *libctx, const char *propq) |