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src: refactor IsSupportedAuthenticatedMode #42368

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merged 1 commit into from
Mar 21, 2022
Merged

src: refactor IsSupportedAuthenticatedMode #42368

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25 changes: 12 additions & 13 deletions src/crypto/crypto_cipher.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -24,21 +24,20 @@ using v8::Uint32;
using v8::Value;

namespace crypto {
#ifdef OPENSSL_NO_OCB
# define IS_OCB_MODE(mode) false
#else
# define IS_OCB_MODE(mode) ((mode) == EVP_CIPH_OCB_MODE)
#endif

namespace {
bool IsSupportedAuthenticatedMode(const EVP_CIPHER* cipher) {
const int mode = EVP_CIPHER_mode(cipher);
// Check `chacha20-poly1305` separately, it is also an AEAD cipher,
// but its mode is 0 which doesn't indicate
return EVP_CIPHER_nid(cipher) == NID_chacha20_poly1305 ||
mode == EVP_CIPH_CCM_MODE ||
mode == EVP_CIPH_GCM_MODE ||
IS_OCB_MODE(mode);
switch (EVP_CIPHER_mode(cipher)) {
case EVP_CIPH_CCM_MODE:
case EVP_CIPH_GCM_MODE:
#ifndef OPENSSL_NO_OCB
case EVP_CIPH_OCB_MODE:
#endif
return true;
case EVP_CIPH_STREAM_CIPHER:
return EVP_CIPHER_nid(cipher) == NID_chacha20_poly1305;
default:
return false;
}
}

bool IsSupportedAuthenticatedMode(const EVP_CIPHER_CTX* ctx) {
Expand Down