| /** \file Encrypt0.c |
| * Contains implementation of the functions related to HCOSE_ENCRYPT handle |
| * objects. |
| */ |
| |
| #include <stdlib.h> |
| #ifndef __MBED__ |
| #include <memory.h> |
| #endif |
| #include <stdio.h> |
| #include <assert.h> |
| |
| #include "cose/cose.h" |
| #include "cose_int.h" |
| #include "cose/cose_configure.h" |
| #include "cose_crypto.h" |
| |
| #if INCLUDE_ENCRYPT0 || INCLUDE_MAC0 |
| |
| COSE *EncryptRoot = NULL; |
| #endif |
| |
| #if INCLUDE_ENCRYPT0 |
| /*! \private |
| * @brief Test if a HCOSE_ENCRYPT handle is valid |
| * |
| * Internal function to test if an encrypt message handle is valid. |
| * This will start returning invalid results and cause the code to |
| * crash if handles are not released before the memory that underlies them |
| * is deallocated. This is an issue of a block allocator is used since |
| * in that case it is common to allocate memory but never to de-allocate it |
| * and just do that in a single big block. |
| * |
| * @param h handle to be validated |
| * @returns result of check |
| */ |
| |
| bool IsValidEncryptHandle(HCOSE_ENCRYPT h) |
| { |
| COSE_Encrypt *p = (COSE_Encrypt *)h; |
| return _COSE_IsInList(EncryptRoot, (COSE *)p); |
| } |
| #endif |
| |
| #if INCLUDE_ENCRYPT0 || INCLUDE_MAC0 |
| HCOSE_ENCRYPT COSE_Encrypt_Init(COSE_INIT_FLAGS flags, |
| CBOR_CONTEXT_COMMA cose_errback *perr) |
| { |
| CHECK_CONDITION(flags == COSE_INIT_FLAGS_NONE, COSE_ERR_INVALID_PARAMETER); |
| COSE_Encrypt *pobj = |
| (COSE_Encrypt *)COSE_CALLOC(1, sizeof(COSE_Encrypt), context); |
| CHECK_CONDITION(pobj != NULL, COSE_ERR_OUT_OF_MEMORY); |
| |
| if (!_COSE_Init(flags, &pobj->m_message, COSE_enveloped_object, |
| CBOR_CONTEXT_PARAM_COMMA perr)) { |
| _COSE_Encrypt_Release(pobj); |
| COSE_FREE(pobj, context); |
| return NULL; |
| } |
| |
| _COSE_InsertInList(&EncryptRoot, &pobj->m_message); |
| |
| return (HCOSE_ENCRYPT)pobj; |
| |
| errorReturn: |
| return NULL; |
| } |
| #endif |
| |
| #if INCLUDE_ENCRYPT0 |
| HCOSE_ENCRYPT COSE_Encrypt_Init_From_Object(cn_cbor *cbor, |
| CBOR_CONTEXT_COMMA cose_errback *perr) |
| { |
| COSE_Encrypt *pobj; |
| |
| cose_errback error = {0}; |
| if (perr == NULL) { |
| perr = &error; |
| } |
| |
| pobj = (COSE_Encrypt *)COSE_CALLOC(1, sizeof(COSE_Encrypt), context); |
| if (pobj == NULL) { |
| perr->err = COSE_ERR_OUT_OF_MEMORY; |
| errorReturn: |
| if (pobj != NULL) { |
| _COSE_Encrypt_Release(pobj); |
| COSE_FREE(pobj, context); |
| } |
| return NULL; |
| } |
| |
| if (!_COSE_Init_From_Object( |
| &pobj->m_message, cbor, CBOR_CONTEXT_PARAM_COMMA perr)) { |
| goto errorReturn; |
| } |
| |
| _COSE_InsertInList(&EncryptRoot, &pobj->m_message); |
| |
| return (HCOSE_ENCRYPT)pobj; |
| } |
| #endif |
| |
| #if INCLUDE_ENCRYPT0 |
| HCOSE_ENCRYPT _COSE_Encrypt_Init_From_Object(cn_cbor *cbor, |
| COSE_Encrypt *pIn, |
| CBOR_CONTEXT_COMMA cose_errback *perr) |
| { |
| COSE_Encrypt *pobj = pIn; |
| cn_cbor *pRecipients = NULL; |
| cose_errback error = {0}; |
| if (perr == NULL) { |
| perr = &error; |
| } |
| |
| if (pobj == NULL) { |
| pobj = (COSE_Encrypt *)COSE_CALLOC(1, sizeof(COSE_Encrypt), context); |
| } |
| if (pobj == NULL) { |
| perr->err = COSE_ERR_OUT_OF_MEMORY; |
| errorReturn: |
| if (pobj != NULL) { |
| _COSE_Encrypt_Release(pobj); |
| if (pIn == NULL) { |
| COSE_FREE(pobj, context); |
| } |
| } |
| return NULL; |
| } |
| |
| if (!_COSE_Init_From_Object( |
| &pobj->m_message, cbor, CBOR_CONTEXT_PARAM_COMMA perr)) { |
| goto errorReturn; |
| } |
| |
| pRecipients = _COSE_arrayget_int(&pobj->m_message, INDEX_RECIPIENTS); |
| CHECK_CONDITION(pRecipients == NULL, COSE_ERR_INVALID_PARAMETER); |
| |
| _COSE_InsertInList(&EncryptRoot, &pobj->m_message); |
| |
| return (HCOSE_ENCRYPT)pobj; |
| } |
| |
| bool COSE_Encrypt_Free(HCOSE_ENCRYPT h) |
| { |
| #ifdef USE_CBOR_CONTEXT |
| cn_cbor_context *context; |
| #endif |
| COSE_Encrypt *pEncrypt = (COSE_Encrypt *)h; |
| |
| if (!IsValidEncryptHandle(h)) { |
| return false; |
| } |
| |
| #ifdef USE_CBOR_CONTEXT |
| context = &((COSE_Encrypt *)h)->m_message.m_allocContext; |
| #endif |
| |
| _COSE_Encrypt_Release(pEncrypt); |
| |
| _COSE_RemoveFromList(&EncryptRoot, &pEncrypt->m_message); |
| |
| COSE_FREE((COSE_Encrypt *)h, context); |
| |
| return true; |
| } |
| #endif |
| |
| #if INCLUDE_ENCRYPT0 || INCLUDE_MAC0 |
| void _COSE_Encrypt_Release(COSE_Encrypt *p) |
| { |
| if (p->pbContent != NULL) { |
| COSE_FREE((void *)p->pbContent, &p->m_message.m_allocContext); |
| } |
| |
| _COSE_Release(&p->m_message); |
| } |
| #endif |
| |
| #if INCLUDE_ENCRYPT0 |
| bool COSE_Encrypt_decrypt(HCOSE_ENCRYPT h, |
| const byte *pbKey, |
| size_t cbKey, |
| cose_errback *perr) |
| { |
| COSE_Encrypt *pcose = (COSE_Encrypt *)h; |
| bool f; |
| |
| if (!IsValidEncryptHandle(h)) { |
| if (perr != NULL) { |
| perr->err = COSE_ERR_INVALID_PARAMETER; |
| } |
| return false; |
| } |
| |
| f = _COSE_Enveloped_decrypt(pcose, NULL, pbKey, cbKey, "Encrypt0", perr); |
| return f; |
| } |
| |
| bool COSE_Encrypt_encrypt(HCOSE_ENCRYPT h, |
| const byte *pbKey, |
| size_t cbKey, |
| cose_errback *perr) |
| { |
| CHECK_CONDITION(IsValidEncryptHandle(h), COSE_ERR_INVALID_HANDLE); |
| CHECK_CONDITION(pbKey != NULL, COSE_ERR_INVALID_PARAMETER); |
| |
| return _COSE_Enveloped_encrypt( |
| (COSE_Encrypt *)h, pbKey, cbKey, "Encrypt0", perr); |
| |
| errorReturn: |
| return false; |
| } |
| |
| const byte *COSE_Encrypt_GetContent(HCOSE_ENCRYPT h, |
| size_t *pcbContent, |
| cose_errback *perror) |
| { |
| COSE_Encrypt *cose = (COSE_Encrypt *)h; |
| if (!IsValidEncryptHandle(h) || (pcbContent == NULL)) { |
| if (perror != NULL) { |
| perror->err = COSE_ERR_INVALID_PARAMETER; |
| } |
| return false; |
| } |
| |
| *pcbContent = cose->cbContent; |
| return cose->pbContent; |
| } |
| |
| bool COSE_Encrypt_SetContent(HCOSE_ENCRYPT h, |
| const byte *rgb, |
| size_t cb, |
| cose_errback *perror) |
| { |
| if (!IsValidEncryptHandle(h) || (rgb == NULL)) { |
| if (perror != NULL) { |
| perror->err = COSE_ERR_INVALID_PARAMETER; |
| } |
| return false; |
| } |
| |
| return _COSE_Encrypt_SetContent((COSE_Encrypt *)h, rgb, cb, perror); |
| } |
| |
| bool _COSE_Encrypt_SetContent(COSE_Encrypt *cose, |
| const byte *rgb, |
| size_t cb, |
| cose_errback *perror) |
| { |
| byte *pb; |
| cose->pbContent = pb = |
| (byte *)COSE_CALLOC(cb, 1, &cose->m_message.m_allocContext); |
| if (cose->pbContent == NULL) { |
| if (perror != NULL) { |
| perror->err = COSE_ERR_INVALID_PARAMETER; |
| } |
| return false; |
| } |
| memcpy(pb, rgb, cb); |
| cose->cbContent = cb; |
| |
| return true; |
| } |
| |
| /*! |
| * @brief Set the application external data for authentication |
| * |
| * Enveloped data objects support the authentication of external application |
| * supplied data. This function is provided to supply that data to the library. |
| * |
| * The external data is not copied, nor will be it freed when the handle is |
| * released. |
| * |
| * @param hcose Handle for the COSE Enveloped data object |
| * @param pbEternalData point to the external data |
| * @param cbExternalData size of the external data |
| * @param perr location to return errors |
| * @return result of the operation. |
| */ |
| |
| bool COSE_Encrypt_SetExternal(HCOSE_ENCRYPT hcose, |
| const byte *pbExternalData, |
| size_t cbExternalData, |
| cose_errback *perr) |
| { |
| if (!IsValidEncryptHandle(hcose)) { |
| if (perr != NULL) { |
| perr->err = COSE_ERR_INVALID_PARAMETER; |
| } |
| return false; |
| } |
| |
| return _COSE_SetExternal(&((COSE_Encrypt *)hcose)->m_message, |
| pbExternalData, cbExternalData, perr); |
| } |
| |
| cn_cbor *COSE_Encrypt_map_get_int(HCOSE_ENCRYPT h, |
| int key, |
| int flags, |
| cose_errback *perror) |
| { |
| if (!IsValidEncryptHandle(h)) { |
| if (perror != NULL) { |
| perror->err = COSE_ERR_INVALID_PARAMETER; |
| } |
| return NULL; |
| } |
| |
| return _COSE_map_get_int( |
| &((COSE_Encrypt *)h)->m_message, key, flags, perror); |
| } |
| |
| bool COSE_Encrypt_map_put_int(HCOSE_ENCRYPT h, |
| int key, |
| cn_cbor *value, |
| int flags, |
| cose_errback *perror) |
| { |
| if (!IsValidEncryptHandle(h) || (value == NULL)) { |
| if (perror != NULL) { |
| perror->err = COSE_ERR_INVALID_PARAMETER; |
| } |
| return false; |
| } |
| |
| return _COSE_map_put( |
| &((COSE_Encrypt *)h)->m_message, key, value, flags, perror); |
| } |
| |
| #endif |