diff options
Diffstat (limited to 'lib/crypto')
| -rw-r--r-- | lib/crypto/c_src/crypto.c | 98 |
1 files changed, 64 insertions, 34 deletions
diff --git a/lib/crypto/c_src/crypto.c b/lib/crypto/c_src/crypto.c index bb2771163d..b9684168ba 100644 --- a/lib/crypto/c_src/crypto.c +++ b/lib/crypto/c_src/crypto.c @@ -1620,44 +1620,62 @@ static ERL_NIF_TERM aes_ctr_stream_encrypt(ErlNifEnv* env, int argc, const ERL_N static ERL_NIF_TERM aes_gcm_encrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]) {/* (Key,Iv,AAD,In) */ #if defined(HAVE_GCM) - GCM128_CONTEXT *ctx = NULL; + EVP_CIPHER_CTX *ctx; + const EVP_CIPHER *cipher = NULL; ErlNifBinary key, iv, aad, in; - AES_KEY aes_key; - unsigned char *outp; + unsigned char *outp, *tagp; ERL_NIF_TERM out, out_tag; + int len; if (!enif_inspect_iolist_as_binary(env, argv[0], &key) - || AES_set_encrypt_key(key.data, key.size*8, &aes_key) != 0 + || (key.size != 16 && key.size != 24 && key.size != 32) || !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)) { return enif_make_badarg(env); } - if (!(ctx = CRYPTO_gcm128_new(&aes_key, (block128_f)AES_encrypt))) - return atom_error; + if (key.size == 16) + cipher = EVP_aes_128_gcm(); + else if (key.size == 24) + cipher = EVP_aes_192_gcm(); + else if (key.size == 32) + cipher = EVP_aes_256_gcm(); - CRYPTO_gcm128_setiv(ctx, iv.data, iv.size); + if (!(ctx = EVP_CIPHER_CTX_new())) + return atom_error; + if (EVP_EncryptInit_ex(ctx, cipher, NULL, NULL, NULL) != 1) + goto out_err; - if (CRYPTO_gcm128_aad(ctx, aad.data, aad.size)) - goto out_err; + EVP_CIPHER_CTX_set_padding(ctx, 0); + + if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_GCM_SET_IVLEN, iv.size, NULL) != 1) + goto out_err; + if (EVP_EncryptInit_ex(ctx, NULL, NULL, key.data, iv.data) != 1) + goto out_err; + if (EVP_EncryptUpdate(ctx, NULL, &len, aad.data, aad.size) != 1) + goto out_err; outp = enif_make_new_binary(env, in.size, &out); - /* encrypt */ - if (CRYPTO_gcm128_encrypt(ctx, in.data, outp, in.size)) - goto out_err; + if (EVP_EncryptUpdate(ctx, outp, &len, in.data, in.size) != 1) + goto out_err; + if (EVP_EncryptFinal_ex(ctx, outp+len, &len) != 1) + goto out_err; + + tagp = enif_make_new_binary(env, EVP_GCM_TLS_TAG_LEN, &out_tag); - /* calculate the tag */ - CRYPTO_gcm128_tag(ctx, enif_make_new_binary(env, EVP_GCM_TLS_TAG_LEN, &out_tag), EVP_GCM_TLS_TAG_LEN); - CRYPTO_gcm128_release(ctx); + if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_GCM_GET_TAG, EVP_GCM_TLS_TAG_LEN, tagp) != 1) + goto out_err; + + EVP_CIPHER_CTX_free(ctx); CONSUME_REDS(env, in); return enif_make_tuple2(env, out, out_tag); out_err: - CRYPTO_gcm128_release(ctx); + EVP_CIPHER_CTX_free(ctx); return atom_error; #else @@ -1668,14 +1686,15 @@ 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) - GCM128_CONTEXT *ctx; + EVP_CIPHER_CTX *ctx; + const EVP_CIPHER *cipher = NULL; ErlNifBinary key, iv, aad, in, tag; - AES_KEY aes_key; unsigned char *outp; ERL_NIF_TERM out; + int len; if (!enif_inspect_iolist_as_binary(env, argv[0], &key) - || AES_set_encrypt_key(key.data, key.size*8, &aes_key) != 0 + || (key.size != 16 && key.size != 24 && key.size != 32) || !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) @@ -1683,32 +1702,43 @@ static ERL_NIF_TERM aes_gcm_decrypt(ErlNifEnv* env, int argc, const ERL_NIF_TERM 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; + if (key.size == 16) + cipher = EVP_aes_128_gcm(); + else if (key.size == 24) + cipher = EVP_aes_192_gcm(); + else if (key.size == 32) + cipher = EVP_aes_256_gcm(); + + if (!(ctx = EVP_CIPHER_CTX_new())) + return atom_error; + if (EVP_DecryptInit_ex(ctx, cipher, NULL, NULL, NULL) != 1) + goto out_err; + if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_GCM_SET_IVLEN, iv.size, NULL) != 1) + goto out_err; + if (EVP_DecryptInit_ex(ctx, NULL, NULL, key.data, iv.data) != 1) + goto out_err; + if (EVP_DecryptUpdate(ctx, NULL, &len, aad.data, aad.size) != 1) + 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; + if (EVP_DecryptUpdate(ctx, outp, &len, in.data, in.size) != 1) + goto out_err; + if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_GCM_SET_TAG, EVP_GCM_TLS_TAG_LEN, tag.data) != 1) + goto out_err; + if (EVP_DecryptFinal_ex(ctx, outp+len, &len) != 1) + goto out_err; - /* calculate and check the tag */ - if (CRYPTO_gcm128_finish(ctx, tag.data, EVP_GCM_TLS_TAG_LEN)) - goto out_err; + EVP_CIPHER_CTX_free(ctx); - CRYPTO_gcm128_release(ctx); CONSUME_REDS(env, in); return out; out_err: - CRYPTO_gcm128_release(ctx); + EVP_CIPHER_CTX_free(ctx); return atom_error; + #else return enif_raise_exception(env, atom_notsup); #endif |