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ARROW-11188: [Rust] Support crypto functions from PostgreSQL dialect
Implemented functions: - [x] MD5 (return type string) - [x] SHA224 (return type binary) - [x] SHA256 (return type binary) - [x] SHA384 (return type binary) - [x] SHA512 (return type binary) Closes #9139 from ovr/crypto-functions Authored-by: Dmitry Patsura <zaets28rus@gmail.com> Signed-off-by: Andrew Lamb <andrew@nerdnetworks.org>
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106 changes: 106 additions & 0 deletions
106
rust/datafusion/src/physical_plan/crypto_expressions.rs
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| @@ -0,0 +1,106 @@ | ||
| // Licensed to the Apache Software Foundation (ASF) under one | ||
| // or more contributor license agreements. See the NOTICE file | ||
| // distributed with this work for additional information | ||
| // regarding copyright ownership. The ASF licenses this file | ||
| // to you under the Apache License, Version 2.0 (the | ||
| // "License"); you may not use this file except in compliance | ||
| // with the License. You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, | ||
| // software distributed under the License is distributed on an | ||
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| // KIND, either express or implied. See the License for the | ||
| // specific language governing permissions and limitations | ||
| // under the License. | ||
|
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| //! Crypto expressions | ||
| use md5::Md5; | ||
| use sha2::{ | ||
| digest::Output as SHA2DigestOutput, Digest as SHA2Digest, Sha224, Sha256, Sha384, | ||
| Sha512, | ||
| }; | ||
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| use crate::error::{DataFusionError, Result}; | ||
| use arrow::array::{ | ||
| ArrayRef, GenericBinaryArray, GenericStringArray, StringOffsetSizeTrait, | ||
| }; | ||
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| fn md5_process(input: &str) -> String { | ||
| let mut digest = Md5::default(); | ||
| digest.update(&input); | ||
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| let mut result = String::new(); | ||
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| for byte in &digest.finalize() { | ||
| result.push_str(&format!("{:02x}", byte)); | ||
| } | ||
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| result | ||
| } | ||
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| // It's not possible to return &[u8], because trait in trait without short lifetime | ||
| fn sha_process<D: SHA2Digest + Default>(input: &str) -> SHA2DigestOutput<D> { | ||
| let mut digest = D::default(); | ||
| digest.update(&input); | ||
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| digest.finalize() | ||
| } | ||
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| macro_rules! crypto_unary_string_function { | ||
| ($NAME:ident, $FUNC:expr) => { | ||
| /// crypto function that accepts Utf8 or LargeUtf8 and returns Utf8 string | ||
| pub fn $NAME<T: StringOffsetSizeTrait>( | ||
| args: &[ArrayRef], | ||
| ) -> Result<GenericStringArray<i32>> { | ||
| if args.len() != 1 { | ||
| return Err(DataFusionError::Internal(format!( | ||
| "{:?} args were supplied but {} takes exactly one argument", | ||
| args.len(), | ||
| String::from(stringify!($NAME)), | ||
| ))); | ||
| } | ||
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| let array = args[0] | ||
| .as_any() | ||
| .downcast_ref::<GenericStringArray<T>>() | ||
| .unwrap(); | ||
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| // first map is the iterator, second is for the `Option<_>` | ||
| Ok(array.iter().map(|x| x.map(|x| $FUNC(x))).collect()) | ||
| } | ||
| }; | ||
| } | ||
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| macro_rules! crypto_unary_binary_function { | ||
| ($NAME:ident, $FUNC:expr) => { | ||
| /// crypto function that accepts Utf8 or LargeUtf8 and returns Binary | ||
| pub fn $NAME<T: StringOffsetSizeTrait>( | ||
| args: &[ArrayRef], | ||
| ) -> Result<GenericBinaryArray<i32>> { | ||
| if args.len() != 1 { | ||
| return Err(DataFusionError::Internal(format!( | ||
| "{:?} args were supplied but {} takes exactly one argument", | ||
| args.len(), | ||
| String::from(stringify!($NAME)), | ||
| ))); | ||
| } | ||
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| let array = args[0] | ||
| .as_any() | ||
| .downcast_ref::<GenericStringArray<T>>() | ||
| .unwrap(); | ||
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| // first map is the iterator, second is for the `Option<_>` | ||
| Ok(array.iter().map(|x| x.map(|x| $FUNC(x))).collect()) | ||
| } | ||
| }; | ||
| } | ||
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| crypto_unary_string_function!(md5, md5_process); | ||
| crypto_unary_binary_function!(sha224, sha_process::<Sha224>); | ||
| crypto_unary_binary_function!(sha256, sha_process::<Sha256>); | ||
| crypto_unary_binary_function!(sha384, sha_process::<Sha384>); | ||
| crypto_unary_binary_function!(sha512, sha_process::<Sha512>); |
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