The sample applications programs/pkey/cert_req.c and
programs/pkey/cert_write.c use the library functions mbedtls_pk_write_csr_pem()
and mbedtls_pk_write_crt_pem() respectively and programs/pkey/gen_key.c uses
the library function mbedtls_pk_write_key_pem().
These are dependent on the configuration option POLARSSL_PEM_WRITE_C. If the
option isn't defined the build breaks.
This change adds the compilation condition POLARSSL_PEM_WRITE_C to these
sample applications.
CSR writing functions now start with x509write_csr_*()
DER writing functions now have the context at the start instead of the
end conforming to other modules.
A new OID module has been created that contains the main OID searching
functionality based on type-dependent arrays. A base type is used to
contain the basic values (oid_descriptor_t) and that type is extended to
contain type specific information (like a pk_alg_t).
As a result the rsa sign and verify function prototypes have changed. They
now expect a md_type_t identifier instead of the removed RSA_SIG_XXX
defines.
All OID definitions have been moved to oid.h
All OID matching code is in the OID module.
The RSA PKCS#1 functions cleaned up as a result and adapted to use the
MD layer.
The SSL layer cleanup up as a result and adapted to use the MD layer.
The X509 parser cleaned up and matches OIDs in certificates with new
module and adapted to use the MD layer.
The X509 writer cleaned up and adapted to use the MD layer.
Apps and tests modified accordingly
