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Update crypto.md to correct function description for decipher.setAAD #33095

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Update crypto.md to correct function description for decipher.setAAD #33095

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Update crypto.md
jbuhacoff Apr 27, 2020
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Update crypto.md
jbuhacoff Apr 27, 2020
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Merge branch 'patch-1' of github.com:jbuhacoff/node into patch-1
jbuhacoff Apr 27, 2020
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7 changes: 6 additions & 1 deletion doc/api/crypto.md
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Expand Up @@ -3095,7 +3095,12 @@ mode must adhere to certain restrictions when using the cipher API:
mode might fail as CCM cannot handle more than one chunk of data per instance.
* When passing additional authenticated data (AAD), the length of the actual
message in bytes must be passed to `setAAD()` via the `plaintextLength`
option. This is not necessary if no AAD is used.
option.
Many crypto libraries include the authentication tag in the ciphertext,
which means that they produce ciphertexts of the length
`plaintextLength + authTagLength`. Node.js does not include the authentication
tag, so the ciphertext length is always `plaintextLength`.
This is not necessary if no AAD is used.
* As CCM processes the whole message at once, `update()` can only be called
once.
* Even though calling `update()` is sufficient to encrypt/decrypt the message,
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