83 lines
35 KiB
Plaintext
83 lines
35 KiB
Plaintext
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rust
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¼ˆ #rustc 1.96.0 (ac68faa20 2026-05-25)ÁíàÄTËŸ ÜJîÄ)'ß\¥! -3d1337db07d0b3aeÁ hmacÁhãÇ/P69‡É¯áímè# -7ee5d9ec04b5f3bfÁ digestÁ ’Bp„ êNR2¢[•„ -9fa09ce0ec266148Á ¤²XctÔ'ÐÓ©z¨É½Ó -a4945860e1c53b00Á ¤°ð ¾ä-±($²ï=©Ã -7e98a21bfd32b0edÁÀ뉊 ]!ÜÛê(¹Þ—šên -5be7b69c3ff7b5b8Á –�òÖÀH•‘P IÓHã#£ -055f30b747f859b6Á rustc_std_workspace_coreÁCçß^ò½èÝ$Çÿ+Cé -c4878ee60b2242c9Á ŸÃï+Ñ]ŠqB<ÏïW# -8dd1dd90e70d0b6aÁ miniz_oxideÁ€š»J(P>àö÷g\K -1eb618da2918ab7fÁ adler2ÁÆ;+Þ®5¥ÌýÝ°¦ÛLˆ -f7919172d268e069Á hashbrownÁPäV9ÒÆèÜ�"ÊÖVŽ\ -0fc2184a5da6723aÁ rustc_std_workspace_allocÁs&ØòØy¯s•bæ!‰ýŠ -97e4bf30be240674Á
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std_detectÁhŠBîÙºÌI®Ë�Å�š -9dbbf8346ba7ac8bÁ rustc_demangleÁûë9´Ç×@Œ�’ùXFº -f33013f239bf9f14Á cfg_ifÁÜLh�ž§Œaã¯>� -0a71c8f33a838301Á addr2lineÁ׎Þ!]8V$É@@T· -e618e6be60e87ba2Á gimliÁ¸
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°µ~Î1‹Ñt ðÁ€w -1f7768a68858f670Á objectÁ
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áPÃ?À¶¼QHJ¥� -914cd6a4dbe590d1Á memchrÁ›º«8Ór2Ù $¨ûib‚ -cf21ca6f2bb15dcdÁë
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‹ás «LÖ€îâƒ×ɯŒ -ee6f3747e38367f0Á
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crypto_commonÁÑ2˸8áÝüV…Ãsã š§ -7e84bbd992443341Á
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generic_arrayÁç"„wÑÒÕµµ¥;è -1fbbe396c4d2fae7Á typenumÁ/-;@ú¨_z,Ö -6209550d9c65d0a6Á block_bufferÁl²>O;-bsò D’¶ Á -fa8e2dfb5eb7e256Á subtleÁÞ Os&¡A ¹]ujO -cb07c5ee900298efÁ À Ý »À|¾ í
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errorsÁ × × sealedÁ
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SealedÁ .™ . CoreÁ . new_from_sliceÁ . new_coreÁ . from_coreÁ .¥ . finalizeÁ 6™ 6Ÿ 6ª 6¿ 6Î 6¥ 6å >™ >Ÿ >ª >¿ >Î >¥ >å
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SimpleHkdfExtractÁ I™
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SimpleHkdfÁ K™ M™ Mš Mæ M input_ikmÁ Må S™ Sš S× W™ Wš Wæ W from_prkÁ W extractÁ W expand_multi_infoÁ W expandÁ _™ _š _× HmacImplÁ c™ e™ e¥ InvalidPrkLengthÁ h
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tƒ v× HkdfExtractÁ x™ xš x_ x _pdÁ }™ }š }ƒ HkdfÁ �™ �š �_ �› †™ †š †ƒ
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.cŠ h h i† ©þµÁéÕ©| ÛÙ ØÙ ¿cÙ ÄcÙ Š p p q¿ Dà7JE4 Û« Ø« ¿c« Äc« .““ CoreWrapperÁ •í� – bufferÁ� É1 ïÀ« // HmacCoreÁ 1Œ
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2 opad_digestÁ
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3 ipad_digestÁ
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SimpleHmacÁ •ŒY – opad_keyÁY — ipad_keyÁY ™õè؈ûj££ Ø x x õ {_ |› Xa8®8ä8£š ¿cœ Ø � � ¾ „_ …› eÀŸ¹øk¤Þ£Ò ¿cé c¥£ j hr pk hs pl ht p} x† �n hv pS x_ � h p6“>“e Š WÛ
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c IKcx�í _$ë × ü ` PhantomDataÁ\“ • ô –
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AlgorithmNameÁlÇ - UnsignedÁDî ý °4ø OutputSizeUserÁt€
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¿lÜ p G¿ q G†„ë h H† i Hü ÏH ü ^ [ An implementation of HKDF, the [HMAC-based Extract-and-Expand Key Derivation Function][1].Á _ ú \c # UsageÁ o ú üsN K The most common way to use HKDF is as follows: you provide the Initial KeyÁ üÂT Q Material (IKM) and an optional salt, then you expand it (perhaps multiple times)Á ü—J G into some Output Key Material (OKM) bound to an "info" context string.Á â ú üæ- * There are two usage options for the salt:Á ” ú ü˜C @ - [`None`] or static for domain separation in a private settingÁ üÜL I - guaranteed to be uniformly-distributed and unique in a public settingÁ © ú üB ? Other non fitting data should be added to the `IKM` or `info`.Á ð ú \ô ```rustÁ ¬€ use sha2::Sha256;Á œ– use hkdf::Hkdf;Á ̪ use hex_literal::hex;Á Ä ú üÈC @ let ikm = hex!("0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b");Á üŒ2 / let salt = hex!("000102030405060708090a0b0c");Á ü¿, ) let info = hex!("f0f1f2f3f4f5f6f7f8f9");Á ì ú üð8 5 let hk = Hkdf::<Sha256>::new(Some(&salt[..]), &ikm);Á ä© let mut okm = [0u8; 42];Á ôÆ hk.expand(&info, &mut okm)Á üå= : .expect("42 is a valid length for Sha256 to output");Á £ ú ̧ let expected = hex!("Á üÁ( % 3cb25f25faacd57a90434f64d0362f2aÁ üê( % 2d2d0a90cf1a5a4c5db02d56ecc4c5bfÁ ä“ 34007208d5b887185865Á <° ");Á ü¸ & # assert_eq!(okm[..], expected[..]);Á <ß ```Á ç ú üë G D Normally the PRK (Pseudo-Random Key) remains hidden within the HKDFÁ ü³
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J G object, but if you need to access it, use [`Hkdf::extract`] instead ofÁ ”þ
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[`Hkdf::new`].Á ‘ ú \• ÷! ¼¡ # use sha2::Sha256;Á ¬¹ # use hkdf::Hkdf;Á ÜÏ # use hex_literal::hex;Á üë E B # let ikm = hex!("0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b");Á ü± 4 1 # let salt = hex!("000102030405060708090a0b0c");Á æ ú üê C @ let (prk, hk) = Hkdf::<Sha256>::extract(Some(&salt[..]), &ikm);Á Ì®
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Ÿ& üÈ
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( % 077709362c2e32df0ddc3f0dc47bba63Á üñ
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( % 90b6c73bb50f9c3122ec844ad7c2b3e5Á <š Ê' ü¢& # assert_eq!(prk[..], expected[..]);Á <É Š( Ñ ú üÕL I If you already have a strong key to work from (uniformly-distributed andÁ ü¢L I long enough), you can save a tiny amount of time by skipping the extractÁ üïC @ step. In this case, you pass a Pseudo-Random Key (PRK) into theÁ ü³J G [`Hkdf::from_prk`] constructor, then use the resulting [`Hkdf`] objectÁ lþ
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