diff options
Diffstat (limited to 'lib/crypto/c_src/crypto.c')
| -rw-r--r-- | lib/crypto/c_src/crypto.c | 58 |
1 files changed, 56 insertions, 2 deletions
diff --git a/lib/crypto/c_src/crypto.c b/lib/crypto/c_src/crypto.c index 067e220863..1eccc669bb 100644 --- a/lib/crypto/c_src/crypto.c +++ b/lib/crypto/c_src/crypto.c @@ -93,6 +93,9 @@ #if OPENSSL_VERSION_NUMBER >= 0x1000100fL # define HAVE_EVP_AES_CTR # define HAVE_GCM +# if OPENSSL_VERSION_NUMBER < 0x1000104fL +# define HAVE_GCM_EVP_DECRYPT_BUG +# endif #endif #if defined(NID_chacha20) && !defined(OPENSSL_NO_CHACHA) && !defined(OPENSSL_NO_POLY1305) @@ -244,6 +247,9 @@ static ERL_NIF_TERM rand_seed_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM a static ERL_NIF_TERM aes_gcm_encrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]); static ERL_NIF_TERM aes_gcm_decrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]); +#ifdef HAVE_GCM_EVP_DECRYPT_BUG +static ERL_NIF_TERM aes_gcm_decrypt_NO_EVP(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]); +#endif static ERL_NIF_TERM chacha20_poly1305_encrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]); static ERL_NIF_TERM chacha20_poly1305_decrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]); @@ -1710,7 +1716,9 @@ out_err: static ERL_NIF_TERM aes_gcm_decrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]) {/* (Key,Iv,AAD,In,Tag) */ -#if defined(HAVE_GCM) +#if defined(HAVE_GCM_EVP_DECRYPT_BUG) + return aes_gcm_decrypt_NO_EVP(env, argc, argv); +#elif defined(HAVE_GCM) EVP_CIPHER_CTX ctx; const EVP_CIPHER *cipher = NULL; ErlNifBinary key, iv, aad, in, tag; @@ -1763,12 +1771,58 @@ static ERL_NIF_TERM aes_gcm_decrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM out_err: EVP_CIPHER_CTX_cleanup(&ctx); return atom_error; - #else return enif_raise_exception(env, atom_notsup); #endif } +#ifdef HAVE_GCM_EVP_DECRYPT_BUG +static ERL_NIF_TERM aes_gcm_decrypt_NO_EVP(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]) +{ + GCM128_CONTEXT *ctx; + ErlNifBinary key, iv, aad, in, tag; + AES_KEY aes_key; + unsigned char *outp; + ERL_NIF_TERM out; + + if (!enif_inspect_iolist_as_binary(env, argv[0], &key) + || AES_set_encrypt_key(key.data, key.size*8, &aes_key) != 0 + || !enif_inspect_binary(env, argv[1], &iv) || iv.size == 0 + || !enif_inspect_iolist_as_binary(env, argv[2], &aad) + || !enif_inspect_iolist_as_binary(env, argv[3], &in) + || !enif_inspect_iolist_as_binary(env, argv[4], &tag) || tag.size != EVP_GCM_TLS_TAG_LEN) { + return enif_make_badarg(env); + } + + if (!(ctx = CRYPTO_gcm128_new(&aes_key, (block128_f)AES_encrypt))) + return atom_error; + + CRYPTO_gcm128_setiv(ctx, iv.data, iv.size); + + if (CRYPTO_gcm128_aad(ctx, aad.data, aad.size)) + goto out_err; + + outp = enif_make_new_binary(env, in.size, &out); + + /* decrypt */ + if (CRYPTO_gcm128_decrypt(ctx, in.data, outp, in.size)) + goto out_err; + + /* calculate and check the tag */ + if (CRYPTO_gcm128_finish(ctx, tag.data, EVP_GCM_TLS_TAG_LEN)) + goto out_err; + + CRYPTO_gcm128_release(ctx); + CONSUME_REDS(env, in); + + return out; + +out_err: + CRYPTO_gcm128_release(ctx); + return atom_error; +} +#endif /* HAVE_GCM_EVP_DECRYPT_BUG */ + #if defined(HAVE_CHACHA20_POLY1305) static void poly1305_update_with_length(poly1305_state *poly1305, |