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add blob hasher function

This commit is contained in:
glyph 2022-02-24 19:43:28 +02:00
parent e6c3a8e993
commit ac0980a7ab
3 changed files with 95 additions and 0 deletions
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66
Cargo.lock generated
View File

@ -223,6 +223,15 @@ version = "1.3.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
[[package]]
name = "block-buffer"
version = "0.10.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0bf7fe51849ea569fd452f37822f606a5cabb684dc918707a0193fd4664ff324"
dependencies = [
"generic-array",
]
[[package]]
name = "blocking"
version = "1.1.0"
@ -282,6 +291,15 @@ dependencies = [
"cache-padded",
]
[[package]]
name = "cpufeatures"
version = "0.2.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "95059428f66df56b63431fdb4e1947ed2190586af5c5a8a8b71122bdf5a7f469"
dependencies = [
"libc",
]
[[package]]
name = "crossbeam-utils"
version = "0.8.7"
@ -292,6 +310,16 @@ dependencies = [
"lazy_static",
]
[[package]]
name = "crypto-common"
version = "0.1.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "57952ca27b5e3606ff4dd79b0020231aaf9d6aa76dc05fd30137538c50bd3ce8"
dependencies = [
"generic-array",
"typenum",
]
[[package]]
name = "ctor"
version = "0.1.21"
@ -302,6 +330,16 @@ dependencies = [
"syn",
]
[[package]]
name = "digest"
version = "0.10.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f2fb860ca6fafa5552fb6d0e816a69c8e49f0908bf524e30a90d97c85892d506"
dependencies = [
"block-buffer",
"crypto-common",
]
[[package]]
name = "dirs"
version = "2.0.2"
@ -448,6 +486,16 @@ version = "0.3.55"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8f5f3913fa0bfe7ee1fd8248b6b9f42a5af4b9d65ec2dd2c3c26132b950ecfc2"
[[package]]
name = "generic-array"
version = "0.14.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "fd48d33ec7f05fbfa152300fdad764757cbded343c1aa1cff2fbaf4134851803"
dependencies = [
"typenum",
"version_check",
]
[[package]]
name = "get_if_addrs"
version = "0.5.3"
@ -507,6 +555,7 @@ dependencies = [
"kuska-ssb",
"serde",
"serde_json",
"sha2",
]
[[package]]
@ -814,6 +863,17 @@ dependencies = [
"serde",
]
[[package]]
name = "sha2"
version = "0.10.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "55deaec60f81eefe3cce0dc50bda92d6d8e88f2a27df7c5033b42afeb1ed2676"
dependencies = [
"cfg-if 1.0.0",
"cpufeatures",
"digest",
]
[[package]]
name = "signal-hook"
version = "0.3.13"
@ -880,6 +940,12 @@ dependencies = [
"syn",
]
[[package]]
name = "typenum"
version = "1.15.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "dcf81ac59edc17cc8697ff311e8f5ef2d99fcbd9817b34cec66f90b6c3dfd987"
[[package]]
name = "unicode-xid"
version = "0.2.2"

1
Cargo.toml
View File

@ -22,3 +22,4 @@ kuska-sodiumoxide = "0.2.5-0"
kuska-ssb = "0.4.0"
serde = { version = "1", features = ["derive"] }
serde_json = "1"
sha2 = "0.10.2"

28
src/blobs.rs
View File

@ -3,6 +3,10 @@
//! Offers the following functions:
//!
//! - [`get_blob_path()`]
//! - [`hash_blob()`]
use base64;
use sha2::{Digest, Sha256};
use crate::error::GolgiError;
@ -54,3 +58,27 @@ pub fn get_blob_path(blob_id: &str) -> Result<String, GolgiError> {
Ok(blob_path)
}
/// Hash the given blob byte slice and return the hex representation and
/// blob ID (sigil-link).
///
/// This function can be used when adding a blob to the local blobstore.
pub fn hash_blob(buffer: &[u8]) -> Result<(String, String), GolgiError> {
// hash the bytes
let hash = Sha256::digest(buffer);
// generate a hex representation of the hash
let hex_hash = format!("{:02x?}", hash)
.replace('[', "")
.replace(']', "")
.replace(',', "")
.replace(' ', "");
// encode the hash
let b64_hash = base64::encode(&hash[..]);
// format the base64 encoding as a blob sigil-link (blob id)
let blob_id = format!("&{}.sha256", b64_hash);
Ok((hex_hash, blob_id))
}