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crypto: make update(buf, enc) ignore encoding #31766

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Make the cipher/decipher/hash/hmac update() methods ignore the input
encoding when the input is a buffer.

This is the documented behavior but some inputs were rejected, notably
when the specified encoding is 'hex' and the buffer has an odd length
(because a string with an odd length is never a valid hex string.)

The sign/verify update() methods work okay because they use different
validation logic.

Fixes: #31751

Make the cipher/decipher/hash/hmac update() methods ignore the input
encoding when the input is a buffer.

This is the documented behavior but some inputs were rejected, notably
when the specified encoding is 'hex' and the buffer has an odd length
(because a _string_ with an odd length is never a valid hex string.)

The sign/verify update() methods work okay because they use different
validation logic.

Fixes: nodejs#31751
@nodejs-github-bot nodejs-github-bot added the crypto Issues and PRs related to the crypto subsystem. label Feb 13, 2020
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@addaleax addaleax added the author ready PRs that have at least one approval, no pending requests for changes, and a CI started. label Feb 13, 2020
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@tniessen
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tniessen commented Mar 5, 2020

Landed in 9ec8781.

@tniessen tniessen closed this Mar 5, 2020
tniessen pushed a commit that referenced this pull request Mar 5, 2020
Make the cipher/decipher/hash/hmac update() methods ignore the input
encoding when the input is a buffer.

This is the documented behavior but some inputs were rejected, notably
when the specified encoding is 'hex' and the buffer has an odd length
(because a _string_ with an odd length is never a valid hex string.)

The sign/verify update() methods work okay because they use different
validation logic.

Fixes: #31751

PR-URL: #31766
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
MylesBorins pushed a commit that referenced this pull request Mar 9, 2020
Make the cipher/decipher/hash/hmac update() methods ignore the input
encoding when the input is a buffer.

This is the documented behavior but some inputs were rejected, notably
when the specified encoding is 'hex' and the buffer has an odd length
(because a _string_ with an odd length is never a valid hex string.)

The sign/verify update() methods work okay because they use different
validation logic.

Fixes: #31751

PR-URL: #31766
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
@MylesBorins MylesBorins mentioned this pull request Mar 10, 2020
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crypto.Decipher.update errors when inputEncoding is provided and data is a Buffer
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