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Correct tag len check when determining how much space we have in the pkt

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If the available space is equal to the tag length then we have no available
space for plaintext data.

Fixes #22699

Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22715)
This commit is contained in:
Matt Caswell 2023-11-13 11:27:54 +00:00 committed by Tomas Mraz
parent aa6ac60728
commit 46376fcf4b
1 changed files with 1 additions and 1 deletions
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2
ssl/quic/quic_record_tx.c
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@ -422,7 +422,7 @@ int ossl_qtx_calculate_plaintext_payload_len(OSSL_QTX *qtx, uint32_t enc_level,
tag_len = ossl_qrl_get_suite_cipher_tag_len(el->suite_id);
if (ciphertext_len < tag_len) {
if (ciphertext_len <= tag_len) {
*plaintext_len = 0;
return 0;
}