westonpace commented on PR #39216:
URL: https://github.com/apache/arrow/pull/39216#issuecomment-1865210877
A few more details from the call that fails:
```
499 if (!EVP_DecryptUpdate(
500 ctx_, plaintext, &len, ciphertext + length_buffer_length_ +
kNonceLength,
501 ciphertext_len - length_buffer_length_ - kNonceLength -
kGcmTagLength)) {
502 throw ParquetException("Failed decryption update");
503 }
(gdb) p ctx_
$1 = (EVP_CIPHER_CTX *) 0x555556cc7440
(gdb) p plaintext
$2 = (uint8_t *) 0x7fff44001180 "\274"
(gdb) p len
$3 = 0
(gdb) p ciphertext
$4 = (const uint8_t *) 0x7fff4802ac84 "*"
(gdb) p length_buffer_length
No symbol "length_buffer_length" in current context.
(gdb) p length_buffer_length_
$5 = 4
(gdb) p kNonceLength
$6 = 12
(gdb) p ciphertext_len
$7 = 46
(gdb) p kGcmTagLength
$8 = 16
```
Sorry, I don't know the crypto stuff well. `len` is 0 which might be
suspicious or it might be completely normal.
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