To clarify the purpose of these two calls rename them to
EVP_CIPHER_CTX_get_original_iv and EVP_CIPHER_CTX_get_updated_iv.
Also rename the OSSL_CIPHER_PARAM_IV_STATE to OSSL_CIPHER_PARAM_UPDATED_IV
to better align with the function name.
Fixes#13411
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/13870)
Some modes (e.g., CBC and OFB) update the effective IV with each
block-cipher invocation, making the "IV" stored in the (historically)
EVP_CIPHER_CTX or (current) PROV_CIPHER_CTX distinct from the initial
IV passed in at cipher initialization time. The latter is stored in
the "oiv" (original IV) field, and has historically been accessible
via the EVP_CIPHER_CTX_original_iv() API. The "effective IV" has
also historically been accessible, via both EVP_CIPHER_CTX_iv()
and EVP_CIPHER_CTX_iv_noconst(), the latter of which allows for
*write* access to the internal cipher state. This is particularly
problematic given that provider-internal cipher state need not, in
general, even be accessible from the same address space as libcrypto,
so these APIs are not sustainable in the long term. However, it still
remains necessary to provide access to the contents of the "IV state"
(e.g., when serializing cipher state for in-kernel TLS); a subsequent
reinitialization of a cipher context using the "IV state" as the
input IV will be able to resume processing of data in a compatible
manner.
This problem was introduced in commit
089cb623be, which effectively caused
all IV queries to return the "original IV", removing access to the
current IV state of the cipher.
These functions for accessing the (even the "original") IV had remained
undocumented for quite some time, presumably due to unease about
exposing the internals of the cipher state in such a manner.
Note that this also as a side effect "fixes" some "bugs" where things
had been referring to the 'iv' field that should have been using the
'oiv' field. It also fixes the EVP_CTRL_GET_IV cipher control,
which was clearly intended to expose the non-original IV, for
use exporting the cipher state into the kernel for kTLS.
Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/12233)
Added Algorithm names AES-128-CBC-CTS, AES-192-CBC-CTS and AES-256-CBC-CTS.
CS1, CS2 and CS3 variants are supported.
Only single shot updates are supported.
The cipher returns the mode EVP_CIPH_CBC_MODE (Internally it shares the aes_cbc cipher code). This
would allow existing code that uses AES_CBC to switch to the CTS variant without breaking code that
tests for this mode. Because it shares the aes_cbc code the cts128.c functions could not be used directly.
The cipher returns the flag EVP_CIPH_FLAG_CTS.
EVP_CIPH_FLAG_FIPS & EVP_CIPH_FLAG_NON_FIPS_ALLOW have been deprecated.
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/12094)
The new naming scheme consistently usese the `OSSL_FUNC_` prefix for all
functions which are dispatched between the core and providers.
This change includes in particular all up- and downcalls, i.e., the
dispatched functions passed from core to provider and vice versa.
- OSSL_core_ -> OSSL_FUNC_core_
- OSSL_provider_ -> OSSL_FUNC_core_
For operations and their function dispatch tables, the following convention
is used:
Type | Name (evp_generic_fetch(3)) |
---------------------|-----------------------------------|
operation | OSSL_OP_FOO |
function id | OSSL_FUNC_FOO_FUNCTION_NAME |
function "name" | OSSL_FUNC_foo_function_name |
function typedef | OSSL_FUNC_foo_function_name_fn |
function ptr getter | OSSL_FUNC_foo_function_name |
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/12222)
Also Add ability for providers to dynamically exclude cipher algorithms.
Cipher algorithms are only returned from providers if their capable() method is either NULL,
or the method returns 1.
This is mainly required for ciphers that only have hardware implementations.
If there is no hardware support, then the algorithm needs to be not available.
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/10146)
Replace L<> link to header-file with a C<> reference.
Change some broken L<provider(3)> links to L<provider(7)>.
For consistency, rename four cipher pages to have a specific mode.
Fix up all references to any "generic" names to point to specific names.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/10100)
Also tweak find-doc-nits while fixing a bug (don't need .in files)
Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/10239)
OpenSSL uses some POD directives masquerading as 'comment'
('=for comment' etc). This is abusive and confusing. Instead, we use
our own keyword.
=for openssl whatever
=begin openssl
whatever
=end openssl
(we have never used the multiline form, but might start one day)
Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/10048)
So far, these two funtions have depended on legacy EVP_CIPHER
implementations to be able to do their work. This change adapts them
to work with provided implementations as well, in one of two possible
ways:
1. If the implementation's set_asn1_parameters or get_asn1_parameters
function pointers are non-NULL, this is a legacy implementation,
and that function is called.
2. Otherwise, if the cipher doesn't have EVP_CIPH_FLAG_CUSTOM_ASN1
set, the default AlgorithmIdentifier parameter code in libcrypto
is executed.
3. Otherwise, if the cipher is a provided implementation, the ASN1
type structure is converted to a DER blob which is then passed to
the implementation as a parameter (param_to_asn1) or the DER blob
is retrieved from the implementation as a parameter and converted
locally to a ASN1_TYPE (asn1_to_param).
With this, the old flag EVP_CIPH_FLAG_DEFAULT_ASN1 has become
irrelevant and is simply ignored.
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/10008)
It's all in the details, from man-pages(7):
Formatting conventions for manual pages describing functions
...
Variable names should, like argument names, be specified in italics.
...
Formatting conventions (general)
...
Special macros, which are usually in uppercase, are in bold.
Exception: don't boldface NULL.
...
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/10034)
Moved the relevant ciphers into default and restructed headers to allow the move.
This removed most of the cases of #ifdef NO_XXX (which are now specified in build.info)
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9482)
Add test to evp_test_extra for ciphers (that is similiar to the digest_fetch).
Move some of the aes and gcm methods that can be shared with other ciphers into ciphers_common.c
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9580)
Recently, we added dispatched functions to get parameter descriptions,
and those for operation context parameters ended up being called
something_gettable_ctx_params and something_settable_ctx_params.
The corresponding dispatched functions to actually perform parameter
transfers were previously called something_ctx_get_params and
something_ctx_set_params, which doesn't quite match, so we rename them
to something_get_ctx_params and something_set_ctx_params.
An argument in favor of this name change is English, where you'd
rather say something like "set the context parameters".
This only change the libcrypto <-> provider interface.
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/9612)
These functions were missing for a completes API:
EVP_MD_get_params(), EVP_CIPHER_get_params(), EVP_CIPHER_CTX_set_params(),
and EVP_CIPHER_CTX_get_params
Additionally, we also add all the corresponding parameter descriptor
returning functions, along the correspoding provider dispatches:
EVP_MD_gettable_params(), EVP_MD_CTX_settable_params(),
EVP_MD_CTX_gettable_params(), EVP_CIPHER_gettable_params(),
EVP_CIPHER_CTX_settable_params(), and EVP_CIPHER_CTX_gettable_params()
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/9576)
Extends the existing provider documentation with information about the
CIPHER operation. This is primarily for provider authors.
Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/9473)
