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31 lines
996 B
31 lines
996 B
diff --git a/providers/implementations/ciphers/cipher_aes_siv.c b/providers/implementations/ciphers/cipher_aes_siv.c
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index 45010b90db..b396c8651a 100644
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--- a/providers/implementations/ciphers/cipher_aes_siv.c
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+++ b/providers/implementations/ciphers/cipher_aes_siv.c
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@@ -120,14 +120,18 @@ static int siv_cipher(void *vctx, unsigned char *out, size_t *outl,
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if (!ossl_prov_is_running())
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return 0;
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- if (inl == 0) {
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- *outl = 0;
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- return 1;
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- }
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+ /* Ignore just empty encryption/decryption call and not AAD. */
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+ if (out != NULL) {
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+ if (inl == 0) {
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+ if (outl != NULL)
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+ *outl = 0;
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+ return 1;
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+ }
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- if (outsize < inl) {
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- ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
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- return 0;
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+ if (outsize < inl) {
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+ ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
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+ return 0;
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+ }
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}
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if (ctx->hw->cipher(ctx, out, in, inl) <= 0)
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