2.2.43.1 SMB2_RDMA_CRYPTO_TRANSFORM
The SMB2_RDMA_CRYPTO_TRANSFORM is used by the client or server to send/receive encrypted or signed RDMA payload in READ/WRITE operations. The SMB2_RDMA_CRYPTO_TRANSFORM is optional and only valid for the SMB 3.1.1 dialect.<89>
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TransformType |
SignatureLength
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NonceLength |
Reserved |
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Signature (variable) Reserved1 |
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Nonce (variable) |
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Padding (variable) |
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TransformType (2 bytes): This field MUST be set to one of the following values.
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Value |
Meaning |
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SMB2_RDMA_TRANSFORM_TYPE_ENCRYPTION 0x0001 |
RDMA transform of type encryption is present and the payload is encrypted. |
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SMB2_RDMA_TRANSFORM_TYPE_SIGNING 0x0002 |
RDMA transform of type signing is present and the payload is signed. |
SignatureLength (2 bytes): The length, in bytes, of Signature field.
NonceLength (2 bytes): The length, in bytes, of Nonce field.
Reserved (2 bytes): This field MUST NOT be used and MUST be reserved. The sender MUST set this to zero, and the receiver MUST ignore it on receipt.
Signature (variable): The signature of the data generated using negotiated encryption/signing algorithm. The length of this field MUST be less than or equal to 16 bytes.
Nonce (variable): An implementation-specific value assigned for encrypted/signed data. This MUST NOT be reused for an SMB2 message within a session.
Padding (variable): This optional field is present after Nonce field so the channel information, if any, after this structure starts at the first 8-byte aligned offset. The sender MUST set this to zero, and the receiver MUST ignore it on receipt.