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generate python/include/olm/olm.h automatically

poljar/cmake_sas
Hubert Chathi 2018-10-12 18:53:18 -04:00
parent 5cf074d337
commit d4b2cce603
3 changed files with 6 additions and 788 deletions
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1
python/.gitignore vendored
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@ -9,3 +9,4 @@ __pycache__
*.pyc
.hypothesis/
.tox/
include/

6
python/Makefile
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@ -2,7 +2,11 @@ PYTHON ?= python
all: olm
olm:
include/olm/olm.h: ../include/olm/olm.h ../include/olm/inbound_group_session.h ../include/olm/outbound_group_session.h
mkdir -p include/olm
$(CPP) -I dummy -I ../include ../include/olm/olm.h -o include/olm/olm.h
olm: include/olm/olm.h
DEVELOP=$(DEVELOP) $(PYTHON) setup.py build
install: olm

787
python/include/olm/olm.h
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@ -1,787 +0,0 @@
/* Copyright 2015, 2016 OpenMarket Ltd
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
static const size_t OLM_MESSAGE_TYPE_PRE_KEY = 0;
static const size_t OLM_MESSAGE_TYPE_MESSAGE = 1;
typedef struct OlmAccount OlmAccount;
typedef struct OlmSession OlmSession;
typedef struct OlmUtility OlmUtility;
/** Get the version number of the library.
* Arguments will be updated if non-null.
*/
void olm_get_library_version(uint8_t *major, uint8_t *minor, uint8_t *patch);
/** The size of an account object in bytes */
size_t olm_account_size();
/** The size of a session object in bytes */
size_t olm_session_size();
/** The size of a utility object in bytes */
size_t olm_utility_size();
/** Initialise an account object using the supplied memory
* The supplied memory must be at least olm_account_size() bytes */
OlmAccount * olm_account(
void * memory
);
/** Initialise a session object using the supplied memory
* The supplied memory must be at least olm_session_size() bytes */
OlmSession * olm_session(
void * memory
);
/** Initialise a utility object using the supplied memory
* The supplied memory must be at least olm_utility_size() bytes */
OlmUtility * olm_utility(
void * memory
);
/** The value that olm will return from a function if there was an error */
size_t olm_error();
/** A null terminated string describing the most recent error to happen to an
* account */
const char * olm_account_last_error(
OlmAccount * account
);
/** A null terminated string describing the most recent error to happen to a
* session */
const char * olm_session_last_error(
OlmSession * session
);
/** A null terminated string describing the most recent error to happen to a
* utility */
const char * olm_utility_last_error(
OlmUtility * utility
);
/** Clears the memory used to back this account */
size_t olm_clear_account(
OlmAccount * account
);
/** Clears the memory used to back this session */
size_t olm_clear_session(
OlmSession * session
);
/** Clears the memory used to back this utility */
size_t olm_clear_utility(
OlmUtility * utility
);
/** Returns the number of bytes needed to store an account */
size_t olm_pickle_account_length(
OlmAccount * account
);
/** Returns the number of bytes needed to store a session */
size_t olm_pickle_session_length(
OlmSession * session
);
/** Stores an account as a base64 string. Encrypts the account using the
* supplied key. Returns the length of the pickled account on success.
* Returns olm_error() on failure. If the pickle output buffer
* is smaller than olm_pickle_account_length() then
* olm_account_last_error() will be "OUTPUT_BUFFER_TOO_SMALL" */
size_t olm_pickle_account(
OlmAccount * account,
void const * key, size_t key_length,
void * pickled, size_t pickled_length
);
/** Stores a session as a base64 string. Encrypts the session using the
* supplied key. Returns the length of the pickled session on success.
* Returns olm_error() on failure. If the pickle output buffer
* is smaller than olm_pickle_session_length() then
* olm_session_last_error() will be "OUTPUT_BUFFER_TOO_SMALL" */
size_t olm_pickle_session(
OlmSession * session,
void const * key, size_t key_length,
void * pickled, size_t pickled_length
);
/** Loads an account from a pickled base64 string. Decrypts the account using
* the supplied key. Returns olm_error() on failure. If the key doesn't
* match the one used to encrypt the account then olm_account_last_error()
* will be "BAD_ACCOUNT_KEY". If the base64 couldn't be decoded then
* olm_account_last_error() will be "INVALID_BASE64". The input pickled
* buffer is destroyed */
size_t olm_unpickle_account(
OlmAccount * account,
void const * key, size_t key_length,
void * pickled, size_t pickled_length
);
/** Loads a session from a pickled base64 string. Decrypts the session using
* the supplied key. Returns olm_error() on failure. If the key doesn't
* match the one used to encrypt the account then olm_session_last_error()
* will be "BAD_ACCOUNT_KEY". If the base64 couldn't be decoded then
* olm_session_last_error() will be "INVALID_BASE64". The input pickled
* buffer is destroyed */
size_t olm_unpickle_session(
OlmSession * session,
void const * key, size_t key_length,
void * pickled, size_t pickled_length
);
/** The number of random bytes needed to create an account.*/
size_t olm_create_account_random_length(
OlmAccount * account
);
/** Creates a new account. Returns olm_error() on failure. If weren't
* enough random bytes then olm_account_last_error() will be
* "NOT_ENOUGH_RANDOM" */
size_t olm_create_account(
OlmAccount * account,
void * random, size_t random_length
);
/** The size of the output buffer needed to hold the identity keys */
size_t olm_account_identity_keys_length(
OlmAccount * account
);
/** Writes the public parts of the identity keys for the account into the
* identity_keys output buffer. Returns olm_error() on failure. If the
* identity_keys buffer was too small then olm_account_last_error() will be
* "OUTPUT_BUFFER_TOO_SMALL". */
size_t olm_account_identity_keys(
OlmAccount * account,
void * identity_keys, size_t identity_key_length
);
/** The length of an ed25519 signature encoded as base64. */
size_t olm_account_signature_length(
OlmAccount * account
);
/** Signs a message with the ed25519 key for this account. Returns olm_error()
* on failure. If the signature buffer was too small then
* olm_account_last_error() will be "OUTPUT_BUFFER_TOO_SMALL" */
size_t olm_account_sign(
OlmAccount * account,
void const * message, size_t message_length,
void * signature, size_t signature_length
);
/** The size of the output buffer needed to hold the one time keys */
size_t olm_account_one_time_keys_length(
OlmAccount * account
);
/** Writes the public parts of the unpublished one time keys for the account
* into the one_time_keys output buffer.
* <p>
* The returned data is a JSON-formatted object with the single property
* <tt>curve25519</tt>, which is itself an object mapping key id to
* base64-encoded Curve25519 key. For example:
* <pre>
* {
* curve25519: {
* "AAAAAA": "wo76WcYtb0Vk/pBOdmduiGJ0wIEjW4IBMbbQn7aSnTo",
* "AAAAAB": "LRvjo46L1X2vx69sS9QNFD29HWulxrmW11Up5AfAjgU"
* }
* }
* </pre>
* Returns olm_error() on failure.
* <p>
* If the one_time_keys buffer was too small then olm_account_last_error()
* will be "OUTPUT_BUFFER_TOO_SMALL". */
size_t olm_account_one_time_keys(
OlmAccount * account,
void * one_time_keys, size_t one_time_keys_length
);
/** Marks the current set of one time keys as being published. */
size_t olm_account_mark_keys_as_published(
OlmAccount * account
);
/** The largest number of one time keys this account can store. */
size_t olm_account_max_number_of_one_time_keys(
OlmAccount * account
);
/** The number of random bytes needed to generate a given number of new one
* time keys. */
size_t olm_account_generate_one_time_keys_random_length(
OlmAccount * account,
size_t number_of_keys
);
/** Generates a number of new one time keys. If the total number of keys stored
* by this account exceeds max_number_of_one_time_keys() then the old keys are
* discarded. Returns olm_error() on error. If the number of random bytes is
* too small then olm_account_last_error() will be "NOT_ENOUGH_RANDOM". */
size_t olm_account_generate_one_time_keys(
OlmAccount * account,
size_t number_of_keys,
void * random, size_t random_length
);
/** The number of random bytes needed to create an outbound session */
size_t olm_create_outbound_session_random_length(
OlmSession * session
);
/** Creates a new out-bound session for sending messages to a given identity_key
* and one_time_key. Returns olm_error() on failure. If the keys couldn't be
* decoded as base64 then olm_session_last_error() will be "INVALID_BASE64"
* If there weren't enough random bytes then olm_session_last_error() will
* be "NOT_ENOUGH_RANDOM". */
size_t olm_create_outbound_session(
OlmSession * session,
OlmAccount * account,
void const * their_identity_key, size_t their_identity_key_length,
void const * their_one_time_key, size_t their_one_time_key_length,
void * random, size_t random_length
);
/** Create a new in-bound session for sending/receiving messages from an
* incoming PRE_KEY message. Returns olm_error() on failure. If the base64
* couldn't be decoded then olm_session_last_error will be "INVALID_BASE64".
* If the message was for an unsupported protocol version then
* olm_session_last_error() will be "BAD_MESSAGE_VERSION". If the message
* couldn't be decoded then then olm_session_last_error() will be
* "BAD_MESSAGE_FORMAT". If the message refers to an unknown one time
* key then olm_session_last_error() will be "BAD_MESSAGE_KEY_ID". */
size_t olm_create_inbound_session(
OlmSession * session,
OlmAccount * account,
void * one_time_key_message, size_t message_length
);
/** Create a new in-bound session for sending/receiving messages from an
* incoming PRE_KEY message. Returns olm_error() on failure. If the base64
* couldn't be decoded then olm_session_last_error will be "INVALID_BASE64".
* If the message was for an unsupported protocol version then
* olm_session_last_error() will be "BAD_MESSAGE_VERSION". If the message
* couldn't be decoded then then olm_session_last_error() will be
* "BAD_MESSAGE_FORMAT". If the message refers to an unknown one time
* key then olm_session_last_error() will be "BAD_MESSAGE_KEY_ID". */
size_t olm_create_inbound_session_from(
OlmSession * session,
OlmAccount * account,
void const * their_identity_key, size_t their_identity_key_length,
void * one_time_key_message, size_t message_length
);
/** The length of the buffer needed to return the id for this session. */
size_t olm_session_id_length(
OlmSession * session
);
/** An identifier for this session. Will be the same for both ends of the
* conversation. If the id buffer is too small then olm_session_last_error()
* will be "OUTPUT_BUFFER_TOO_SMALL". */
size_t olm_session_id(
OlmSession * session,
void * id, size_t id_length
);
int olm_session_has_received_message(
OlmSession *session
);
/** Checks if the PRE_KEY message is for this in-bound session. This can happen
* if multiple messages are sent to this account before this account sends a
* message in reply. Returns 1 if the session matches. Returns 0 if the session
* does not match. Returns olm_error() on failure. If the base64
* couldn't be decoded then olm_session_last_error will be "INVALID_BASE64".
* If the message was for an unsupported protocol version then
* olm_session_last_error() will be "BAD_MESSAGE_VERSION". If the message
* couldn't be decoded then then olm_session_last_error() will be
* "BAD_MESSAGE_FORMAT". */
size_t olm_matches_inbound_session(
OlmSession * session,
void * one_time_key_message, size_t message_length
);
/** Checks if the PRE_KEY message is for this in-bound session. This can happen
* if multiple messages are sent to this account before this account sends a
* message in reply. Returns 1 if the session matches. Returns 0 if the session
* does not match. Returns olm_error() on failure. If the base64
* couldn't be decoded then olm_session_last_error will be "INVALID_BASE64".
* If the message was for an unsupported protocol version then
* olm_session_last_error() will be "BAD_MESSAGE_VERSION". If the message
* couldn't be decoded then then olm_session_last_error() will be
* "BAD_MESSAGE_FORMAT". */
size_t olm_matches_inbound_session_from(
OlmSession * session,
void const * their_identity_key, size_t their_identity_key_length,
void * one_time_key_message, size_t message_length
);
/** Removes the one time keys that the session used from the account. Returns
* olm_error() on failure. If the account doesn't have any matching one time
* keys then olm_account_last_error() will be "BAD_MESSAGE_KEY_ID". */
size_t olm_remove_one_time_keys(
OlmAccount * account,
OlmSession * session
);
/** The type of the next message that olm_encrypt() will return. Returns
* OLM_MESSAGE_TYPE_PRE_KEY if the message will be a PRE_KEY message.
* Returns OLM_MESSAGE_TYPE_MESSAGE if the message will be a normal message.
* Returns olm_error on failure. */
size_t olm_encrypt_message_type(
OlmSession * session
);
/** The number of random bytes needed to encrypt the next message. */
size_t olm_encrypt_random_length(
OlmSession * session
);
/** The size of the next message in bytes for the given number of plain-text
* bytes. */
size_t olm_encrypt_message_length(
OlmSession * session,
size_t plaintext_length
);
/** Encrypts a message using the session. Returns the length of the message in
* bytes on success. Writes the message as base64 into the message buffer.
* Returns olm_error() on failure. If the message buffer is too small then
* olm_session_last_error() will be "OUTPUT_BUFFER_TOO_SMALL". If there
* weren't enough random bytes then olm_session_last_error() will be
* "NOT_ENOUGH_RANDOM". */
size_t olm_encrypt(
OlmSession * session,
void const * plaintext, size_t plaintext_length,
void * random, size_t random_length,
void * message, size_t message_length
);
/** The maximum number of bytes of plain-text a given message could decode to.
* The actual size could be different due to padding. The input message buffer
* is destroyed. Returns olm_error() on failure. If the message base64
* couldn't be decoded then olm_session_last_error() will be
* "INVALID_BASE64". If the message is for an unsupported version of the
* protocol then olm_session_last_error() will be "BAD_MESSAGE_VERSION".
* If the message couldn't be decoded then olm_session_last_error() will be
* "BAD_MESSAGE_FORMAT". */
size_t olm_decrypt_max_plaintext_length(
OlmSession * session,
size_t message_type,
void * message, size_t message_length
);
/** Decrypts a message using the session. The input message buffer is destroyed.
* Returns the length of the plain-text on success. Returns olm_error() on
* failure. If the plain-text buffer is smaller than
* olm_decrypt_max_plaintext_length() then olm_session_last_error()
* will be "OUTPUT_BUFFER_TOO_SMALL". If the base64 couldn't be decoded then
* olm_session_last_error() will be "INVALID_BASE64". If the message is for
* an unsupported version of the protocol then olm_session_last_error() will
* be "BAD_MESSAGE_VERSION". If the message couldn't be decoded then
* olm_session_last_error() will be BAD_MESSAGE_FORMAT".
* If the MAC on the message was invalid then olm_session_last_error() will
* be "BAD_MESSAGE_MAC". */
size_t olm_decrypt(
OlmSession * session,
size_t message_type,
void * message, size_t message_length,
void * plaintext, size_t max_plaintext_length
);
/** The length of the buffer needed to hold the SHA-256 hash. */
size_t olm_sha256_length(
OlmUtility * utility
);
/** Calculates the SHA-256 hash of the input and encodes it as base64. If the
* output buffer is smaller than olm_sha256_length() then
* olm_session_last_error() will be "OUTPUT_BUFFER_TOO_SMALL". */
size_t olm_sha256(
OlmUtility * utility,
void const * input, size_t input_length,
void * output, size_t output_length
);
/** Verify an ed25519 signature. If the key was too small then
* olm_session_last_error will be "INVALID_BASE64". If the signature was invalid
* then olm_session_last_error() will be "BAD_MESSAGE_MAC". */
size_t olm_ed25519_verify(
OlmUtility * utility,
void const * key, size_t key_length,
void const * message, size_t message_length,
void * signature, size_t signature_length
);
typedef struct OlmOutboundGroupSession OlmOutboundGroupSession;
/** get the size of an outbound group session, in bytes. */
size_t olm_outbound_group_session_size();
/**
* Initialise an outbound group session object using the supplied memory
* The supplied memory should be at least olm_outbound_group_session_size()
* bytes.
*/
OlmOutboundGroupSession * olm_outbound_group_session(
void *memory
);
/**
* A null terminated string describing the most recent error to happen to a
* group session */
const char *olm_outbound_group_session_last_error(
const OlmOutboundGroupSession *session
);
/** Clears the memory used to back this group session */
size_t olm_clear_outbound_group_session(
OlmOutboundGroupSession *session
);
/** Returns the number of bytes needed to store an outbound group session */
size_t olm_pickle_outbound_group_session_length(
const OlmOutboundGroupSession *session
);
/**
* Stores a group session as a base64 string. Encrypts the session using the
* supplied key. Returns the length of the session on success.
*
* Returns olm_error() on failure. If the pickle output buffer
* is smaller than olm_pickle_outbound_group_session_length() then
* olm_outbound_group_session_last_error() will be "OUTPUT_BUFFER_TOO_SMALL"
*/
size_t olm_pickle_outbound_group_session(
OlmOutboundGroupSession *session,
void const * key, size_t key_length,
void * pickled, size_t pickled_length
);
/**
* Loads a group session from a pickled base64 string. Decrypts the session
* using the supplied key.
*
* Returns olm_error() on failure. If the key doesn't match the one used to
* encrypt the account then olm_outbound_group_session_last_error() will be
* "BAD_ACCOUNT_KEY". If the base64 couldn't be decoded then
* olm_outbound_group_session_last_error() will be "INVALID_BASE64". The input
* pickled buffer is destroyed
*/
size_t olm_unpickle_outbound_group_session(
OlmOutboundGroupSession *session,
void const * key, size_t key_length,
void * pickled, size_t pickled_length
);
/** The number of random bytes needed to create an outbound group session */
size_t olm_init_outbound_group_session_random_length(
const OlmOutboundGroupSession *session
);
/**
* Start a new outbound group session. Returns olm_error() on failure. On
* failure last_error will be set with an error code. The last_error will be
* NOT_ENOUGH_RANDOM if the number of random bytes was too small.
*/
size_t olm_init_outbound_group_session(
OlmOutboundGroupSession *session,
uint8_t *random, size_t random_length
);
/**
* The number of bytes that will be created by encrypting a message
*/
size_t olm_group_encrypt_message_length(
OlmOutboundGroupSession *session,
size_t plaintext_length
);
/**
* Encrypt some plain-text. Returns the length of the encrypted message or
* olm_error() on failure. On failure last_error will be set with an
* error code. The last_error will be OUTPUT_BUFFER_TOO_SMALL if the output
* buffer is too small.
*/
size_t olm_group_encrypt(
OlmOutboundGroupSession *session,
uint8_t const * plaintext, size_t plaintext_length,
uint8_t * message, size_t message_length
);
/**
* Get the number of bytes returned by olm_outbound_group_session_id()
*/
size_t olm_outbound_group_session_id_length(
const OlmOutboundGroupSession *session
);
/**
* Get a base64-encoded identifier for this session.
*
* Returns the length of the session id on success or olm_error() on
* failure. On failure last_error will be set with an error code. The
* last_error will be OUTPUT_BUFFER_TOO_SMALL if the id buffer was too
* small.
*/
size_t olm_outbound_group_session_id(
OlmOutboundGroupSession *session,
uint8_t * id, size_t id_length
);
/**
* Get the current message index for this session.
*
* Each message is sent with an increasing index; this returns the index for
* the next message.
*/
uint32_t olm_outbound_group_session_message_index(
OlmOutboundGroupSession *session
);
/**
* Get the number of bytes returned by olm_outbound_group_session_key()
*/
size_t olm_outbound_group_session_key_length(
const OlmOutboundGroupSession *session
);
/**
* Get the base64-encoded current ratchet key for this session.
*
* Each message is sent with a different ratchet key. This function returns the
* ratchet key that will be used for the next message.
*
* Returns the length of the ratchet key on success or olm_error() on
* failure. On failure last_error will be set with an error code. The
* last_error will be OUTPUT_BUFFER_TOO_SMALL if the buffer was too small.
*/
size_t olm_outbound_group_session_key(
OlmOutboundGroupSession *session,
uint8_t * key, size_t key_length
);
typedef struct OlmInboundGroupSession OlmInboundGroupSession;
/** get the size of an inbound group session, in bytes. */
size_t olm_inbound_group_session_size();
/**
* Initialise an inbound group session object using the supplied memory
* The supplied memory should be at least olm_inbound_group_session_size()
* bytes.
*/
OlmInboundGroupSession * olm_inbound_group_session(
void *memory
);
/**
* A null terminated string describing the most recent error to happen to a
* group session */
const char *olm_inbound_group_session_last_error(
const OlmInboundGroupSession *session
);
/** Clears the memory used to back this group session */
size_t olm_clear_inbound_group_session(
OlmInboundGroupSession *session
);
/** Returns the number of bytes needed to store an inbound group session */
size_t olm_pickle_inbound_group_session_length(
const OlmInboundGroupSession *session
);
/**
* Stores a group session as a base64 string. Encrypts the session using the
* supplied key. Returns the length of the session on success.
*
* Returns olm_error() on failure. If the pickle output buffer
* is smaller than olm_pickle_inbound_group_session_length() then
* olm_inbound_group_session_last_error() will be "OUTPUT_BUFFER_TOO_SMALL"
*/
size_t olm_pickle_inbound_group_session(
OlmInboundGroupSession *session,
void const * key, size_t key_length,
void * pickled, size_t pickled_length
);
/**
* Loads a group session from a pickled base64 string. Decrypts the session
* using the supplied key.
*
* Returns olm_error() on failure. If the key doesn't match the one used to
* encrypt the account then olm_inbound_group_session_last_error() will be
* "BAD_ACCOUNT_KEY". If the base64 couldn't be decoded then
* olm_inbound_group_session_last_error() will be "INVALID_BASE64". The input
* pickled buffer is destroyed
*/
size_t olm_unpickle_inbound_group_session(
OlmInboundGroupSession *session,
void const * key, size_t key_length,
void * pickled, size_t pickled_length
);
/**
* Start a new inbound group session, from a key exported from
* olm_outbound_group_session_key
*
* Returns olm_error() on failure. On failure last_error will be set with an
* error code. The last_error will be:
*
* * OLM_INVALID_BASE64 if the session_key is not valid base64
* * OLM_BAD_SESSION_KEY if the session_key is invalid
*/
size_t olm_init_inbound_group_session(
OlmInboundGroupSession *session,
/* base64-encoded keys */
uint8_t const * session_key, size_t session_key_length
);
/**
* Import an inbound group session, from a previous export.
*
* Returns olm_error() on failure. On failure last_error will be set with an
* error code. The last_error will be:
*
* * OLM_INVALID_BASE64 if the session_key is not valid base64
* * OLM_BAD_SESSION_KEY if the session_key is invalid
*/
size_t olm_import_inbound_group_session(
OlmInboundGroupSession *session,
/* base64-encoded keys; note that it will be overwritten with the base64-decoded
data. */
uint8_t const * session_key, size_t session_key_length
);
/**
* Get an upper bound on the number of bytes of plain-text the decrypt method
* will write for a given input message length. The actual size could be
* different due to padding.
*
* The input message buffer is destroyed.
*
* Returns olm_error() on failure.
*/
size_t olm_group_decrypt_max_plaintext_length(
OlmInboundGroupSession *session,
uint8_t * message, size_t message_length
);
/**
* Decrypt a message.
*
* The input message buffer is destroyed.
*
* Returns the length of the decrypted plain-text, or olm_error() on failure.
*
* On failure last_error will be set with an error code. The last_error will
* be:
* * OLM_OUTPUT_BUFFER_TOO_SMALL if the plain-text buffer is too small
* * OLM_INVALID_BASE64 if the message is not valid base-64
* * OLM_BAD_MESSAGE_VERSION if the message was encrypted with an unsupported
* version of the protocol
* * OLM_BAD_MESSAGE_FORMAT if the message headers could not be decoded
* * OLM_BAD_MESSAGE_MAC if the message could not be verified
* * OLM_UNKNOWN_MESSAGE_INDEX if we do not have a session key corresponding to the
* message's index (ie, it was sent before the session key was shared with
* us)
*/
size_t olm_group_decrypt(
OlmInboundGroupSession *session,
/* input; note that it will be overwritten with the base64-decoded
message. */
uint8_t * message, size_t message_length,
/* output */
uint8_t * plaintext, size_t max_plaintext_length,
uint32_t * message_index
);
/**
* Get the number of bytes returned by olm_inbound_group_session_id()
*/
size_t olm_inbound_group_session_id_length(
const OlmInboundGroupSession *session
);
/**
* Get a base64-encoded identifier for this session.
*
* Returns the length of the session id on success or olm_error() on
* failure. On failure last_error will be set with an error code. The
* last_error will be OUTPUT_BUFFER_TOO_SMALL if the id buffer was too
* small.
*/
size_t olm_inbound_group_session_id(
OlmInboundGroupSession *session,
uint8_t * id, size_t id_length
);
/**
* Get the first message index we know how to decrypt.
*/
uint32_t olm_inbound_group_session_first_known_index(
const OlmInboundGroupSession *session
);
/**
* Check if the session has been verified as a valid session.
*
* (A session is verified either because the original session share was signed,
* or because we have subsequently successfully decrypted a message.)
*
* This is mainly intended for the unit tests, currently.
*/
int olm_inbound_group_session_is_verified(
const OlmInboundGroupSession *session
);
/**
* Get the number of bytes returned by olm_export_inbound_group_session()
*/
size_t olm_export_inbound_group_session_length(
const OlmInboundGroupSession *session
);
/**
* Export the base64-encoded ratchet key for this session, at the given index,
* in a format which can be used by olm_import_inbound_group_session
*
* Returns the length of the ratchet key on success or olm_error() on
* failure. On failure last_error will be set with an error code. The
* last_error will be:
* * OUTPUT_BUFFER_TOO_SMALL if the buffer was too small
* * OLM_UNKNOWN_MESSAGE_INDEX if we do not have a session key corresponding to the
* given index (ie, it was sent before the session key was shared with
* us)
*/
size_t olm_export_inbound_group_session(
OlmInboundGroupSession *session,
uint8_t * key, size_t key_length, uint32_t message_index
);