54 lines
1.5 KiB
Rust
54 lines
1.5 KiB
Rust
use chrono::{DateTime, Utc};
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use hmac::{Hmac, Mac, NewMac};
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use sha2::Sha256;
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use garage_util::data::{sha256sum, Hash};
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pub mod error;
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pub mod payload;
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pub mod streaming;
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use error::*;
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pub const SHORT_DATE: &str = "%Y%m%d";
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pub const LONG_DATETIME: &str = "%Y%m%dT%H%M%SZ";
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type HmacSha256 = Hmac<Sha256>;
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pub fn verify_signed_content(expected_sha256: Hash, body: &[u8]) -> Result<(), Error> {
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if expected_sha256 != sha256sum(body) {
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return Err(Error::bad_request(
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"Request content hash does not match signed hash".to_string(),
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));
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}
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Ok(())
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}
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pub fn signing_hmac(
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datetime: &DateTime<Utc>,
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secret_key: &str,
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region: &str,
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service: &str,
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) -> Result<HmacSha256, crypto_mac::InvalidKeyLength> {
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let secret = String::from("AWS4") + secret_key;
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let mut date_hmac = HmacSha256::new_varkey(secret.as_bytes())?;
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date_hmac.update(datetime.format(SHORT_DATE).to_string().as_bytes());
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let mut region_hmac = HmacSha256::new_varkey(&date_hmac.finalize().into_bytes())?;
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region_hmac.update(region.as_bytes());
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let mut service_hmac = HmacSha256::new_varkey(®ion_hmac.finalize().into_bytes())?;
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service_hmac.update(service.as_bytes());
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let mut signing_hmac = HmacSha256::new_varkey(&service_hmac.finalize().into_bytes())?;
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signing_hmac.update(b"aws4_request");
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let hmac = HmacSha256::new_varkey(&signing_hmac.finalize().into_bytes())?;
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Ok(hmac)
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}
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pub fn compute_scope(datetime: &DateTime<Utc>, region: &str, service: &str) -> String {
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format!(
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"{}/{}/{}/aws4_request",
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datetime.format(SHORT_DATE),
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region,
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service
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)
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}
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