/* Provenance: openssl/openssl siv_cipher (fixed).
 * repo: openssl/openssl
 * commit: 00e2f5eea29994d19293ec4e8c8775ba73678598
 * parent: 175fa8469fc78f6cf35dfb87d26899e60e9ff1d4
 * commit_url: https://github.com/openssl/openssl/commit/00e2f5eea29994d19293ec4e8c8775ba73678598
 * cve: CVE-2023-2975
 * license: Apache-2.0
 * function: siv_cipher
 * relpath: providers/implementations/ciphers/cipher_aes_siv.c
 */

static int siv_cipher(void *vctx, unsigned char *out, size_t *outl,
                      size_t outsize, const unsigned char *in, size_t inl)
{
    PROV_AES_SIV_CTX *ctx = (PROV_AES_SIV_CTX *)vctx;

    if (!ossl_prov_is_running())
        return 0;

    /* Ignore just empty encryption/decryption call and not AAD. */
    if (out != NULL) {
        if (inl == 0) {
            if (outl != NULL)
                *outl = 0;
            return 1;
        }

        if (outsize < inl) {
            ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
            return 0;
        }
    }

    if (ctx->hw->cipher(ctx, out, in, inl) <= 0)
        return 0;

    if (outl != NULL)
        *outl = inl;
    return 1;
}