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Andy Green c9731c5f17 type comparisons: fixes 
This is a huge patch that should be a global NOP.

For unix type platforms it enables -Wconversion to issue warnings (-> error)
for all automatic casts that seem less than ideal but are normally concealed
by the toolchain.

This is things like passing an int to a size_t argument.  Once enabled, I
went through all args on my default build (which build most things) and
tried to make the removed default cast explicit.

With that approach it neither change nor bloat the code, since it compiles
to whatever it was doing before, just with the casts made explicit... in a
few cases I changed some length args from int to size_t but largely left
the causes alone.

From now on, new code that is relying on less than ideal casting
will complain and nudge me to improve it by warnings.
2021-01-05 10:56:38 +00:00
..
jwe type comparisons: fixes 2021-01-05 10:56:38 +00:00
jwk type comparisons: fixes 2021-01-05 10:56:38 +00:00
jws type comparisons: fixes 2021-01-05 10:56:38 +00:00
CMakeLists.txt cmakelist: Augean Stables refactor 2020-05-27 08:40:12 +01:00
private-lib-jose.h private.h: rename to contain dir 2019-08-15 10:49:52 +01:00
README.md jwe 2018-12-27 06:45:32 +08:00

README.md

JOSE support

JOSE is a set of web standards aimed at encapsulating crypto operations flexibly inside JSON objects.

Lws provides lightweight apis to performs operations on JWK, JWS and JWE independent of the tls backend in use. The JSON parsing is handled by the lws lejp stream parser.

Part RFC Function
JWS RFC7515 JSON Web Signatures
JWE RFC7516 JSON Web Encryption
JWK RFC7517 JSON Web Keys
JWA RFC7518 JSON Web Algorithms

JWA is a set of recommendations for which combinations of algorithms are deemed desirable and secure, which implies what must be done for useful implementations of JWS, JWE and JWK.

Supported algorithms

Supported keys

  • All RFC7517 / JWK forms: octet, RSA and EC

  • singleton and keys[] arrays of keys supported

Symmetric ciphers

  • All common AES varaiants: CBC, CFB128, CFB8, CTR, EVB, OFB, KW and XTS

Asymmetric ciphers

  • RSA

  • EC (P-256, P-384 and P-521 JWA curves)

Payload auth and crypt

  • AES_128_CBC_HMAC_SHA_256
  • AES_192_CBC_HMAC_SHA_384
  • AES_256_CBC_HMAC_SHA_512
  • AES_128_GCM

For the required and recommended asymmetric algorithms, support currently looks like this

JWK kty JWA lws
EC Recommended+ yes
RSA Required yes
oct Required yes
JWE alg JWA lws
RSA1_5 Recommended- yes
RSA-OAEP Recommended+ no
ECDH-ES Recommended+ no
JWS alg JWA lws
HS256 Required yes
RS256 Recommended+ yes
ES256 Recommended yes

Minimal Example tools

JWK

JWS

JWE

API tests

See ./minimal-examples/api-tests/api-test-jose/ for example test code. The tests are built and confirmed during CI.