CONFIG_CRYPTO_OFB: OFB (Output Feedback)

General informations

The Linux kernel configuration item CONFIG_CRYPTO_OFB has multiple definitions:

OFB (Output Feedback) found in crypto/Kconfig

The configuration item CONFIG_CRYPTO_OFB:

• prompt: OFB (Output Feedback)
• type: tristate
• depends on: (none)
• defined in crypto/Kconfig
• found in Linux kernels: 6.1–6.2, 6.3-rc+HEAD
• modules built: ofb

Help text

OFB (Output Feedback) mode (NIST SP800-38A)

This mode makes a block cipher into a synchronous stream cipher. It generates keystream blocks, which are then XORed with the plaintext blocks to get the ciphertext. Flipping a bit in the ciphertext produces a flipped bit in the plaintext at the same location. This property allows many error correcting codes to function normally even when applied before encryption.

OFB support found in crypto/Kconfig

The configuration item CONFIG_CRYPTO_OFB:

• prompt: OFB support
• type: tristate
• depends on: (none)
• defined in crypto/Kconfig
• found in Linux kernels: 4.20, 5.0–5.19, 6.0, 6.0+HEAD
• modules built: ofb

Help text

OFB: the Output Feedback mode makes a block cipher into a synchronous stream cipher. It generates keystream blocks, which are then XORed with the plaintext blocks to get the ciphertext. Flipping a bit in the ciphertext produces a flipped bit in the plaintext at the same location. This property allows many error correcting codes to function normally even when applied before encryption.

Hardware

LKDDb

Raw data from LKDDb:

• lkddb module ofb CONFIG_CRYPTO_OFB : crypto/Kconfig : "OFB (Output Feedback)" # in 4.20, 5.0–5.19, 6.0–6.2, 6.3-rc+HEAD

Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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