StealthDB special functions

generate_key()

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Generates a new key, seals it with SGX hardware key and appends to the local file DATA_FILENAME. All computations with the secret data are performed inside an enclave. The function returns the serial number of the key (note: temporarily, serial number is always 0).

• load_key(int4)
  

Reads sealed key from the local file DATA_FILENAME, unseals it and uploads into an enclave as the master key. The argument is a serial number of a previously generated key (note: temporarily, serial number is always 0).

• enable_debug_mode(int4)
  

Enables/disables encryption of PostgreSQL datatypes and their conversion into encrypted ones, it also allows automatically decrypt the query result. The argument is 0 (disable) or 1 (enable). This function makes the system insecure, because a malicious DBMS can potentially extract and decrypt all encrypted values. Eventually, the function will be moved to an independent enclave according to the paper.

pg_enc_int4_encrypt(int4)

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Encrypts an int4 with the master key, returns enc_int4 element.

pg_enc_int4_decrypt(enc_int4)

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Decrypts an enc_int4 element with the master key and returns int4.

pg_enc_float4_encrypt(float4)

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Encrypts a float4 with the master key, returns enc_float4 element.

pg_enc_float4_decrypt(enc_float4)

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Decrypts an enc_float4 element with the master key and returns float4.

pg_enc_text_encrypt(varchar)

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Encrypts a string with the master key, returns enc_text element as a string (note: temporarily, the length of the input string is limited by 1024 characters)

pg_enc_text_decrypt(enc_text)

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Decrypts an enc_text element with the master key and returns a string.

pg_enc_timestamp_enrypt(timestamp)

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Encrypts the timestamp with the master key, returns enc_timestamp element.

pg_enc_timestamp_decrypt(enc_timestamp)

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Decrypts an enc_timestamp element with the master key and returns timestamp.