JSON Web Encryption (JWE)
draft-ietf-jose-json-web-encryption-03
JOSE Working Group M. Jones
Internet-Draft Microsoft
Intended status: Standards Track E. Rescorla
Expires: January 7, 2013 RTFM
J. Hildebrand
Cisco
July 6, 2012
JSON Web Encryption (JWE)
draft-ietf-jose-json-web-encryption-03
Abstract
JSON Web Encryption (JWE) is a means of representing encrypted
content using JavaScript Object Notation (JSON) data structures.
Cryptographic algorithms and identifiers for use with this
specification are described in the separate JSON Web Algorithms (JWA)
specification. Related digital signature and MAC capabilities are
described in the separate JSON Web Signature (JWS) specification.
Status of this Memo
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This Internet-Draft will expire on January 7, 2013.
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Copyright (c) 2012 IETF Trust and the persons identified as the
document authors. All rights reserved.
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Internet-Draft JWE July 2012
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1. Notational Conventions . . . . . . . . . . . . . . . . . . 4
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. JSON Web Encryption (JWE) Overview . . . . . . . . . . . . . . 6
3.1. Example JWE with an Integrated Integrity Check . . . . . . 6
3.2. Example JWE with a Separate Integrity Check . . . . . . . 8
4. JWE Header . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.1. Reserved Header Parameter Names . . . . . . . . . . . . . 10
4.1.1. "alg" (Algorithm) Header Parameter . . . . . . . . . . 11
4.1.2. "enc" (Encryption Method) Header Parameter . . . . . . 11
4.1.3. "int" (Integrity Algorithm) Header Parameter . . . . . 11
4.1.4. "kdf" (Key Derivation Function) Header Parameter . . . 12
4.1.5. "iv" (Initialization Vector) Header Parameter . . . . 12
4.1.6. "epk" (Ephemeral Public Key) Header Parameter . . . . 12
4.1.7. "zip" (Compression Algorithm) Header Parameter . . . . 12
4.1.8. "jku" (JWK Set URL) Header Parameter . . . . . . . . . 12
4.1.9. "jwk" (JSON Web Key) Header Parameter . . . . . . . . 13
4.1.10. "x5u" (X.509 URL) Header Parameter . . . . . . . . . . 13
4.1.11. "x5t" (X.509 Certificate Thumbprint) Header
Parameter . . . . . . . . . . . . . . . . . . . . . . 13
4.1.12. "x5c" (X.509 Certificate Chain) Header Parameter . . . 14
4.1.13. "kid" (Key ID) Header Parameter . . . . . . . . . . . 14
4.1.14. "typ" (Type) Header Parameter . . . . . . . . . . . . 14
4.1.15. "cty" (Content Type) Header Parameter . . . . . . . . 15
4.2. Public Header Parameter Names . . . . . . . . . . . . . . 15
4.3. Private Header Parameter Names . . . . . . . . . . . . . . 15
5. Message Encryption . . . . . . . . . . . . . . . . . . . . . . 15
6. Message Decryption . . . . . . . . . . . . . . . . . . . . . . 17
7. CMK Encryption . . . . . . . . . . . . . . . . . . . . . . . . 18
8. Integrity Value Calculation . . . . . . . . . . . . . . . . . 18
9. Encrypting JWEs with Cryptographic Algorithms . . . . . . . . 19
10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 19
10.1. Registration of JWE Header Parameter Names . . . . . . . . 19
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