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Implement S/G IO for batched sends and eliminate another frame copy (#2874)

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This commit is contained in:
Cameron Gutman
2024-07-18 23:04:18 -05:00
committed by GitHub
parent 16f62436a9
commit 3935d305ae
6 changed files with 199 additions and 56 deletions
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15
src/crypto.cpp
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@@ -185,7 +185,7 @@ namespace crypto {
* The resulting ciphertext and the GCM tag are written into the tagged_cipher buffer.
*/
int
gcm_t::encrypt(const std::string_view &plaintext, std::uint8_t *tagged_cipher, aes_t *iv) {
gcm_t::encrypt(const std::string_view &plaintext, std::uint8_t *tag, std::uint8_t *ciphertext, aes_t *iv) {
if (!encrypt_ctx && init_encrypt_gcm(encrypt_ctx, &key, iv, padding)) {
return -1;
}
@@ -196,18 +196,15 @@ namespace crypto {
return -1;
}
auto tag = tagged_cipher;
auto cipher = tag + tag_size;
int update_outlen, final_outlen;
// Encrypt into the caller's buffer
if (EVP_EncryptUpdate(encrypt_ctx.get(), cipher, &update_outlen, (const std::uint8_t *) plaintext.data(), plaintext.size()) != 1) {
if (EVP_EncryptUpdate(encrypt_ctx.get(), ciphertext, &update_outlen, (const std::uint8_t *) plaintext.data(), plaintext.size()) != 1) {
return -1;
}
// GCM encryption won't ever fill ciphertext here but we have to call it anyway
if (EVP_EncryptFinal_ex(encrypt_ctx.get(), cipher + update_outlen, &final_outlen) != 1) {
if (EVP_EncryptFinal_ex(encrypt_ctx.get(), ciphertext + update_outlen, &final_outlen) != 1) {
return -1;
}
@@ -218,6 +215,12 @@ namespace crypto {
return update_outlen + final_outlen;
}
int
gcm_t::encrypt(const std::string_view &plaintext, std::uint8_t *tagged_cipher, aes_t *iv) {
// This overload handles the common case of [GCM tag][cipher text] buffer layout
return encrypt(plaintext, tagged_cipher, tagged_cipher + tag_size, iv);
}
int
ecb_t::decrypt(const std::string_view &cipher, std::vector<std::uint8_t> &plaintext) {
auto fg = util::fail_guard([this]() {