EVP_GCM_TLS_TAG_LEN
if (len < EVP_GCM_TLS_TAG_LEN)
len -= EVP_GCM_TLS_TAG_LEN;
return EVP_GCM_TLS_TAG_LEN;
len < (EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN))
len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN);
rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, EVP_GCM_TLS_TAG_LEN);
if (memcmp(ctx->buf, in + len, EVP_GCM_TLS_TAG_LEN)) {