ad062480f7
This supports all the modes, suites and export mechanisms defined in RFC9180 and should be relatively easily extensible if/as new suites are added. The APIs are based on the pseudo-code from the RFC, e.g. OSS_HPKE_encap() roughly maps to SetupBaseS(). External APIs are defined in include/openssl/hpke.h and documented in doc/man3/OSSL_HPKE_CTX_new.pod. Tests (test/hpke_test.c) include verifying a number of the test vectors from the RFC as well as round-tripping for all the modes and suites. We have demonstrated interoperability with other HPKE implementations via a fork [1] that implements TLS Encrypted ClientHello (ECH) which uses HPKE. @slontis provided huge help in getting this done and this makes extensive use of the KEM handling code from his PR#19068. [1] https://github.com/sftcd/openssl/tree/ECH-draft-13c Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Shane Lontis <shane.lontis@oracle.com> Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/17172) |
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| .. | ||
| build.info | ||
| err_all_legacy.c | ||
| err_all.c | ||
| err_blocks.c | ||
| err_local.h | ||
| err_mark.c | ||
| err_prn.c | ||
| err.c | ||
| openssl.ec | ||
| openssl.txt | ||
| README.md | ||
Adding new libraries
When adding a new sub-library to OpenSSL, assign it a library number
ERR_LIB_XXX, define a macro XXXerr() (both in err.h), add its
name to ERR_str_libraries[] (in crypto/err/err.c), and add
ERR_load_XXX_strings() to the ERR_load_crypto_strings() function
(in crypto/err/err_all.c). Finally, add an entry:
L XXX xxx.h xxx_err.c
to crypto/err/openssl.ec, and add xxx_err.c to the Makefile.
Running make errors will then generate a file xxx_err.c, and
add all error codes used in the library to xxx.h.
Additionally the library include file must have a certain form. Typically it will initially look like this:
#ifndef HEADER_XXX_H
#define HEADER_XXX_H
#ifdef __cplusplus
extern "C" {
#endif
/* Include files */
#include <openssl/bio.h>
#include <openssl/x509.h>
/* Macros, structures and function prototypes */
/* BEGIN ERROR CODES */
The BEGIN ERROR CODES sequence is used by the error code
generation script as the point to place new error codes, any text
after this point will be overwritten when make errors is run.
The closing #endif etc will be automatically added by the script.
The generated C error code file xxx_err.c will load the header
files stdio.h, openssl/err.h and openssl/xxx.h so the
header file must load any additional header files containing any
definitions it uses.