| #include <stdlib.h> |
| #include <memory.h> |
| #include <stdio.h> |
| #include <assert.h> |
| |
| #include "cose.h" |
| #include "cose_int.h" |
| #include "configure.h" |
| #include "crypto.h" |
| |
| byte RgbDontUse[8 * 1024]; // Remove this array when we can compute the size of a cbor serialization without this hack. |
| |
| |
| bool IsValidEncryptHandle(HCOSE_ENCRYPT h) |
| { |
| COSE_Encrypt * p = (COSE_Encrypt *)h; |
| if (p == NULL) return false; |
| return true; |
| } |
| |
| |
| size_t COSE_Encode(HCOSE msg, byte * rgb, int ib, size_t cb) |
| { |
| if (rgb == NULL) return cn_cbor_encoder_write(RgbDontUse, 0, sizeof(RgbDontUse), ((COSE *)msg)->m_cbor) + ib; |
| return cn_cbor_encoder_write(rgb, ib, cb, ((COSE*)msg)->m_cbor); |
| } |
| |
| HCOSE_ENCRYPT COSE_Encrypt_Init(CBOR_CONTEXT_COMMA cose_errback * perror) |
| { |
| COSE_Encrypt * pobj = (COSE_Encrypt *)COSE_CALLOC(1, sizeof(COSE_Encrypt), context); |
| if (pobj == NULL) { |
| if (perror != NULL) perror->err = COSE_ERR_OUT_OF_MEMORY; |
| return NULL; |
| } |
| |
| if (!_COSE_Init(&pobj->m_message, COSE_enveloped_object, CBOR_CONTEXT_PARAM_COMMA perror)) { |
| COSE_Encrypt_Free((HCOSE_ENCRYPT)pobj); |
| return NULL; |
| } |
| |
| return (HCOSE_ENCRYPT) pobj; |
| } |
| |
| 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; |
| cn_cbor * tmp; |
| 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 ((pIn == NULL) && (pobj != NULL)) COSE_FREE(pobj, context); |
| return NULL; |
| } |
| |
| if (!_COSE_Init_From_Object(&pobj->m_message, cbor, CBOR_CONTEXT_PARAM_COMMA perr)) { |
| goto errorReturn; |
| } |
| |
| tmp = _COSE_arrayget_int(&pobj->m_message, INDEX_BODY); |
| if (tmp != NULL) { |
| CHECK_CONDITION(tmp->type == CN_CBOR_BYTES, COSE_ERR_INVALID_PARAMETER); |
| pobj->cbContent = tmp->length; |
| pobj->pbContent = (byte *) tmp->v.str; |
| } |
| |
| pRecipients = _COSE_arrayget_int(&pobj->m_message, INDEX_RECIPIENTS); |
| if (pRecipients != NULL) { |
| CHECK_CONDITION(pRecipients->type == CN_CBOR_ARRAY, COSE_ERR_INVALID_PARAMETER); |
| |
| pRecipients = pRecipients->first_child; |
| while (pRecipients != NULL) { |
| COSE_RecipientInfo * pInfo = _COSE_Recipient_Init_From_Object(pRecipients, CBOR_CONTEXT_PARAM_COMMA perr); |
| CHECK_CONDITION(pInfo != NULL, COSE_ERR_OUT_OF_MEMORY); |
| |
| pInfo->m_recipientNext = pobj->m_recipientFirst; |
| pobj->m_recipientFirst = pInfo; |
| pRecipients = pRecipients->next; |
| } |
| } |
| |
| return(HCOSE_ENCRYPT) pobj; |
| } |
| |
| bool COSE_Encrypt_Free(HCOSE_ENCRYPT h) |
| { |
| #ifdef USE_CBOR_CONTEXT |
| cn_cbor_context context; |
| #endif |
| |
| if (!IsValidEncryptHandle(h)) return false; |
| |
| #ifdef USE_CBOR_CONTEXT |
| context = ((COSE_Encrypt *)h)->m_message.m_allocContext; |
| #endif |
| |
| _COSE_Encrypt_Release((COSE_Encrypt *)h); |
| |
| COSE_FREE((COSE_Encrypt *)h, &context); |
| |
| return true; |
| } |
| |
| void _COSE_Encrypt_Release(COSE_Encrypt * p) |
| { |
| if (p->pbContent != NULL) COSE_FREE((void *) p->pbContent, &p->m_message.m_allocContext); |
| // if (p->pbIV != NULL) COSE_FREE(p->pbIV, &p->m_message.m_allocContext); |
| if (p->pbKey != NULL) COSE_FREE(p ->pbKey, &p->m_message.m_allocContext); |
| |
| _COSE_Release(&p->m_message); |
| } |
| |
| HCOSE_RECIPIENT COSE_Encrypt_add_shared_secret(HCOSE_ENCRYPT hcose, COSE_Algorithms alg, byte * rgbKey, int cbKey, byte * rgbKid, int cbKid, cose_errback * perror) |
| { |
| #ifdef USE_CBOR_CONTEXT |
| cn_cbor_context * context; |
| #endif // USE_CBOR_CONTEXT |
| COSE_RecipientInfo * pobj; |
| COSE_Encrypt * pcose = (COSE_Encrypt *)hcose; |
| |
| if (!IsValidEncryptHandle(hcose) || (rgbKey == NULL)) { |
| if (perror != NULL) perror->err = COSE_ERR_INVALID_PARAMETER; |
| return NULL; |
| } |
| |
| switch (alg) { |
| case COSE_Algorithm_Direct: |
| break; |
| |
| default: |
| if (perror != NULL) perror->err = COSE_ERR_INVALID_PARAMETER; |
| return NULL; |
| } |
| |
| |
| #ifdef USE_CBOR_CONTEXT |
| context = &pcose->m_message.m_allocContext; |
| #endif // USE_CBOR_CONTEXT |
| |
| pobj = (COSE_RecipientInfo *) COSE_CALLOC(1, sizeof(COSE_RecipientInfo) , context); |
| if (pobj == NULL) { |
| oom_error: |
| if (perror != NULL) perror->err = COSE_ERR_OUT_OF_MEMORY; |
| error: |
| // M00BUG COSE_Recipient_Free(pobj); |
| return NULL; |
| } |
| |
| if (!_COSE_Init(&pobj->m_encrypt.m_message, COSE_unknown_object, CBOR_CONTEXT_PARAM_COMMA perror)) { |
| goto error; |
| } |
| |
| if (!cn_cbor_mapput_int(pobj->m_encrypt.m_message.m_unprotectMap, COSE_Header_Algorithm, cn_cbor_int_create(alg, CBOR_CONTEXT_PARAM_COMMA NULL), CBOR_CONTEXT_PARAM_COMMA NULL)) goto error; |
| |
| if (cbKid > 0) { |
| byte * pb = (byte *)COSE_CALLOC(cbKid, 1, context); |
| if (pb == NULL) goto oom_error; |
| memcpy(pb, rgbKid, cbKid); |
| if (!cn_cbor_mapput_int(pobj->m_encrypt.m_message.m_unprotectMap, COSE_Header_KID, cn_cbor_data_create(pb, cbKid, CBOR_CONTEXT_PARAM_COMMA NULL), CBOR_CONTEXT_PARAM_COMMA NULL)) { |
| COSE_FREE(pb, context); |
| goto oom_error; // M00BUG - get error from CBOR |
| } |
| } |
| |
| |
| pobj->m_encrypt.pbKey = (byte *) COSE_CALLOC(cbKey, 1, context); |
| if (pobj->m_encrypt.pbKey == NULL) goto error; |
| memcpy(pobj->m_encrypt.pbKey, rgbKey, cbKey); |
| pobj->m_encrypt.cbKey = cbKey; |
| |
| pobj->m_recipientNext = pcose->m_recipientFirst; |
| pcose->m_recipientFirst = pobj; |
| |
| cn_cbor * pRecipients = _COSE_arrayget_int(&pcose->m_message, INDEX_RECIPIENTS); |
| if (pRecipients == NULL) { |
| pRecipients = cn_cbor_array_create(CBOR_CONTEXT_PARAM_COMMA NULL); |
| if (pRecipients == NULL) goto error; |
| if (!_COSE_array_replace(&pcose->m_message, pRecipients, INDEX_RECIPIENTS, CBOR_CONTEXT_PARAM_COMMA NULL)) { |
| CN_CBOR_FREE(pRecipients, context); |
| goto error; |
| } |
| } |
| |
| cn_cbor_array_append(pRecipients, pobj->m_encrypt.m_message.m_cbor, NULL); |
| |
| pobj->m_encrypt.m_message.m_flags |= 1; |
| return (HCOSE_RECIPIENT) pobj; |
| } |
| |
| bool COSE_Encrypt_decrypt(HCOSE_ENCRYPT h, HCOSE_RECIPIENT hRecip, cose_errback * perr) |
| { |
| COSE_Encrypt * pcose = (COSE_Encrypt *)h; |
| COSE_RecipientInfo * pRecip = (COSE_RecipientInfo *)hRecip; |
| cose_errback error = { 0 }; |
| bool f; |
| |
| if (!IsValidEncryptHandle(h) || (!IsValidRecipientHandle(hRecip))) { |
| if (perr != NULL) perr->err = COSE_ERR_INVALID_PARAMETER; |
| return false; |
| } |
| |
| f = _COSE_Encrypt_decrypt(pcose, pRecip, 0, NULL, &error); |
| if (perr != NULL) *perr = error; |
| return f; |
| } |
| |
| bool _COSE_Encrypt_decrypt(COSE_Encrypt * pcose, COSE_RecipientInfo * pRecip, int cbitKey, byte *pbKeyIn, cose_errback * perr) |
| { |
| int alg; |
| const cn_cbor * cn = NULL; |
| |
| byte * pbKey = pbKeyIn; |
| #ifdef USE_CBOR_CONTEXT |
| cn_cbor_context * context; |
| #endif |
| byte * pbAuthData = NULL; |
| ssize_t cbAuthData; |
| cn_cbor * pAuthData = NULL; |
| byte * pbProtected = NULL; |
| ssize_t cbProtected; |
| cn_cbor * ptmp = NULL; |
| |
| #ifdef USE_CBOR_CONTEXT |
| context = &pcose->m_message.m_allocContext; |
| #endif |
| |
| cn = _COSE_map_get_int(&pcose->m_message, COSE_Header_Algorithm, COSE_BOTH, perr); |
| if (cn == NULL) { |
| error: |
| errorReturn: |
| if (pbProtected != NULL) COSE_FREE(pbProtected, context); |
| if (pbAuthData != NULL) COSE_FREE(pbAuthData, context); |
| if (pAuthData != NULL) cn_cbor_free(pAuthData CBOR_CONTEXT_PARAM); |
| if ((pbKey != NULL) && (pbKeyIn == NULL)) { |
| memset(pbKey, 0xff, cbitKey / 8); |
| COSE_FREE(pbKey, context); |
| } |
| return false; |
| } |
| CHECK_CONDITION((cn->type == CN_CBOR_UINT) || (cn->type == CN_CBOR_INT), COSE_ERR_INVALID_PARAMETER); |
| alg = (int) cn->v.uint; |
| |
| switch (alg) { |
| #ifdef INCLUDE_AES_CCM |
| case COSE_Algorithm_AES_CCM_16_64_128: |
| case COSE_Algorithm_AES_CCM_16_128_128: |
| case COSE_Algorithm_AES_CCM_64_64_128: |
| case COSE_Algorithm_AES_CCM_64_128_128: |
| cbitKey = 128; |
| break; |
| |
| case COSE_Algorithm_AES_CCM_64_64_256: |
| case COSE_Algorithm_AES_CCM_16_128_256: |
| case COSE_Algorithm_AES_CCM_64_128_256: |
| case COSE_Algorithm_AES_CCM_16_64_256: |
| cbitKey = 256; |
| break; |
| #endif // INCLUDE_AES_CCM |
| |
| case COSE_Algorithm_AES_GCM_128: |
| cbitKey = 128; |
| break; |
| |
| case COSE_Algorithm_AES_GCM_192: |
| cbitKey = 192; |
| break; |
| |
| case COSE_Algorithm_AES_GCM_256: |
| cbitKey = 256; |
| break; |
| |
| default: |
| FAIL_CONDITION(COSE_ERR_UNKNOWN_ALGORITHM); |
| break; |
| } |
| |
| // Allocate the key if we have not already done so |
| |
| if (pbKey == NULL) { |
| pbKey = COSE_CALLOC(cbitKey / 8, 1, context); |
| CHECK_CONDITION(pbKey != NULL, COSE_ERR_OUT_OF_MEMORY); |
| } |
| |
| // If there is a recipient - ask it for the key |
| |
| for (pRecip = pcose->m_recipientFirst; pRecip != NULL; pRecip = pRecip->m_recipientNext) { |
| if (_COSE_Recipient_decrypt(pRecip, cbitKey, pbKey, perr)) break; |
| } |
| |
| // Build protected headers |
| |
| CHECK_CONDITION(pcose->m_message.m_protectedMap != NULL, COSE_ERR_INVALID_PARAMETER); |
| if ((pcose->m_message.m_protectedMap != NULL) && (pcose->m_message.m_protectedMap->first_child != NULL)) { |
| cbProtected = cn_cbor_encoder_write(RgbDontUse, 0, sizeof(RgbDontUse), pcose->m_message.m_protectedMap); |
| pbProtected = (byte *)COSE_CALLOC(cbProtected, 1, context); |
| if (pbProtected == NULL) goto error; |
| if (cn_cbor_encoder_write(pbProtected, 0, cbProtected, pcose->m_message.m_protectedMap) != cbProtected) goto error; |
| } |
| else { |
| pbProtected = NULL; |
| cbProtected = 0; |
| } |
| |
| // Build authenticated data |
| pbAuthData = NULL; |
| pAuthData = cn_cbor_array_create(CBOR_CONTEXT_PARAM_COMMA NULL); |
| |
| ptmp = cn_cbor_string_create("Enveloped", CBOR_CONTEXT_PARAM_COMMA NULL); |
| CHECK_CONDITION(ptmp != NULL, COSE_ERR_CBOR); |
| cn_cbor_array_append(pAuthData, ptmp, NULL); |
| ptmp = NULL; |
| |
| ptmp = cn_cbor_data_create(pbProtected, cbProtected, CBOR_CONTEXT_PARAM_COMMA NULL); |
| CHECK_CONDITION(ptmp != NULL, COSE_ERR_CBOR); |
| cn_cbor_array_append(pAuthData, ptmp, NULL); |
| pbProtected = NULL; |
| ptmp = NULL; |
| |
| ptmp = cn_cbor_data_create(NULL, 0, CBOR_CONTEXT_PARAM_COMMA NULL); |
| CHECK_CONDITION(ptmp != NULL, COSE_ERR_CBOR); |
| cn_cbor_array_append(pAuthData, ptmp, NULL); |
| |
| cbAuthData = cn_cbor_encoder_write(RgbDontUse, 0, sizeof(RgbDontUse), pAuthData); |
| pbAuthData = (byte *)COSE_CALLOC(cbAuthData, 1, context); |
| CHECK_CONDITION(pbAuthData != NULL, COSE_ERR_OUT_OF_MEMORY); |
| CHECK_CONDITION((cn_cbor_encoder_write(pbAuthData, 0, cbAuthData, pAuthData) == cbAuthData), COSE_ERR_CBOR); |
| |
| switch (alg) { |
| #ifdef INCLUDE_AES_CCM |
| case COSE_Algorithm_AES_CCM_16_64_128: |
| case COSE_Algorithm_AES_CCM_16_64_256: |
| if (!AES_CCM_Decrypt(pcose, 64, 16, pbKey, cbitKey / 8, pbAuthData, cbAuthData, perr)) goto error; |
| break; |
| |
| case COSE_Algorithm_AES_CCM_16_128_128: |
| case COSE_Algorithm_AES_CCM_16_128_256: |
| if (!AES_CCM_Decrypt(pcose, 128, 16, pbKey, cbitKey / 8, pbAuthData, cbAuthData, perr)) goto error; |
| break; |
| |
| case COSE_Algorithm_AES_CCM_64_64_128: |
| case COSE_Algorithm_AES_CCM_64_64_256: |
| if (!AES_CCM_Decrypt(pcose, 64, 64, pbKey, cbitKey / 8, pbAuthData, cbAuthData, perr)) goto error; |
| break; |
| |
| case COSE_Algorithm_AES_CCM_64_128_128: |
| case COSE_Algorithm_AES_CCM_64_128_256: |
| if (!AES_CCM_Decrypt(pcose, 128, 64, pbKey, cbitKey / 8, pbAuthData, cbAuthData, perr)) goto error; |
| break; |
| #endif // INCLUDE_AES_CCM |
| |
| case COSE_Algorithm_AES_GCM_128: |
| case COSE_Algorithm_AES_GCM_192: |
| case COSE_Algorithm_AES_GCM_256: |
| if (!AES_GCM_Decrypt(pcose, pbKey, cbitKey / 8, pbAuthData, cbAuthData, perr)) goto error; |
| break; |
| |
| default: |
| FAIL_CONDITION(COSE_ERR_UNKNOWN_ALGORITHM); |
| break; |
| } |
| |
| if (pbProtected != NULL) COSE_FREE(pbProtected, context); |
| if (pbAuthData != NULL) COSE_FREE(pbAuthData, context); |
| if (pAuthData != NULL) cn_cbor_free(pAuthData CBOR_CONTEXT_PARAM); |
| if ((pbKey != NULL) && (pbKeyIn == NULL)) COSE_FREE(pbKey, context); |
| if (perr != NULL) perr->err = COSE_ERR_NONE; |
| |
| return true; |
| } |
| |
| bool COSE_Encrypt_encrypt(HCOSE_ENCRYPT h, cose_errback * perr) |
| { |
| int alg; |
| int t; |
| COSE_RecipientInfo * pri; |
| const cn_cbor * cn_Alg = NULL; |
| byte * pbAuthData = NULL; |
| cn_cbor * pAuthData = NULL; |
| cn_cbor * ptmp = NULL; |
| size_t cbitKey; |
| #ifdef USE_CBOR_CONTEXT |
| cn_cbor_context * context = NULL; |
| #endif |
| COSE_Encrypt * pcose = (COSE_Encrypt *) h; |
| cn_cbor_errback cbor_error; |
| |
| CHECK_CONDITION(IsValidEncryptHandle(h), COSE_ERR_INVALID_PARAMETER); |
| |
| #ifdef USE_CBOR_CONTEXT |
| context = &pcose->m_message.m_allocContext; |
| #endif // USE_CBOR_CONTEXT |
| |
| cn_Alg = _COSE_map_get_int(&pcose->m_message, COSE_Header_Algorithm, COSE_BOTH, perr); |
| if (cn_Alg == NULL) goto errorReturn; |
| |
| CHECK_CONDITION((cn_Alg->type == CN_CBOR_UINT) || (cn_Alg->type == CN_CBOR_INT), COSE_ERR_INVALID_PARAMETER); |
| alg = (int) cn_Alg->v.uint; |
| |
| // Get the key size |
| |
| switch (alg) { |
| #ifdef INCLUDE_AES_CCM |
| case COSE_Algorithm_AES_CCM_64_64_128: |
| case COSE_Algorithm_AES_CCM_16_128_128: |
| case COSE_Algorithm_AES_CCM_64_128_128: |
| case COSE_Algorithm_AES_CCM_16_64_128: |
| cbitKey = 128; |
| break; |
| |
| case COSE_Algorithm_AES_CCM_64_64_256: |
| case COSE_Algorithm_AES_CCM_16_128_256: |
| case COSE_Algorithm_AES_CCM_64_128_256: |
| case COSE_Algorithm_AES_CCM_16_64_256: |
| cbitKey = 256; |
| break; |
| #endif // INCLUDE_AES_CCM |
| |
| case COSE_Algorithm_AES_GCM_128: cbitKey = 128; break; |
| case COSE_Algorithm_AES_GCM_192: cbitKey = 192; break; |
| case COSE_Algorithm_AES_GCM_256: cbitKey = 256; break; |
| |
| default: |
| FAIL_CONDITION(COSE_ERR_INVALID_PARAMETER); |
| } |
| |
| // If we are doing direct encryption - then recipient generates the key |
| |
| if (pcose->pbKey == NULL) { |
| t = 0; |
| for (pri = pcose->m_recipientFirst; pri != NULL; pri = pri->m_recipientNext) { |
| if (pri->m_encrypt.m_message.m_flags & 1) { |
| t |= 1; |
| pcose->pbKey = _COSE_RecipientInfo_generateKey(pri, cbitKey, perr); |
| if (pcose->pbKey == NULL) goto errorReturn; |
| pcose->cbKey = cbitKey / 8; |
| } |
| else { |
| t |= 2; |
| } |
| } |
| CHECK_CONDITION(t != 3, COSE_ERR_INVALID_PARAMETER); |
| } |
| |
| if (pcose->pbKey == NULL) { |
| pcose->pbKey = (byte *) COSE_CALLOC(cbitKey/8, 1, context); |
| CHECK_CONDITION(pcose->pbKey != NULL, COSE_ERR_OUT_OF_MEMORY); |
| pcose->cbKey = cbitKey / 8; |
| rand_bytes(pcose->pbKey, pcose->cbKey); |
| } |
| |
| // Build protected headers |
| |
| const cn_cbor * cbProtected = _COSE_encode_protected(&pcose->m_message, perr); |
| if (cbProtected == NULL) goto errorReturn; |
| |
| // Build authenticated data |
| ssize_t cbAuthData = 0; |
| pbAuthData = NULL; |
| pAuthData = cn_cbor_array_create(CBOR_CONTEXT_PARAM_COMMA &cbor_error); |
| CHECK_CONDITION_CBOR(pAuthData != NULL, cbor_error); |
| |
| ptmp = cn_cbor_string_create("Enveloped", CBOR_CONTEXT_PARAM_COMMA &cbor_error); |
| CHECK_CONDITION_CBOR(ptmp != NULL, cbor_error); |
| CHECK_CONDITION_CBOR(cn_cbor_array_append(pAuthData, ptmp, &cbor_error), cbor_error); |
| ptmp = NULL; |
| |
| ptmp = cn_cbor_data_create(cbProtected->v.bytes, (int) cbProtected->length, CBOR_CONTEXT_PARAM_COMMA &cbor_error); |
| CHECK_CONDITION_CBOR(ptmp != NULL, cbor_error); |
| CHECK_CONDITION_CBOR(cn_cbor_array_append(pAuthData, ptmp, &cbor_error), cbor_error); |
| ptmp = NULL; |
| |
| ptmp = cn_cbor_data_create(NULL, 0, CBOR_CONTEXT_PARAM_COMMA &cbor_error); |
| CHECK_CONDITION_CBOR(ptmp != NULL, cbor_error); |
| CHECK_CONDITION_CBOR(cn_cbor_array_append(pAuthData, ptmp, &cbor_error), cbor_error); |
| ptmp = NULL; |
| |
| cbAuthData = cn_cbor_encoder_write(RgbDontUse, 0, sizeof(RgbDontUse), pAuthData); |
| pbAuthData = (byte *) COSE_CALLOC(cbAuthData, 1, context); |
| CHECK_CONDITION(pbAuthData != NULL, COSE_ERR_OUT_OF_MEMORY); |
| CHECK_CONDITION(cn_cbor_encoder_write(pbAuthData, 0, cbAuthData, pAuthData) == cbAuthData, COSE_ERR_CBOR); |
| |
| switch (alg) { |
| #ifdef INCLUDE_AES_CCM |
| case COSE_Algorithm_AES_CCM_16_64_128: |
| if (!AES_CCM_Encrypt(pcose, 64, 16, 128, pbAuthData, cbAuthData, perr)) goto errorReturn; |
| break; |
| |
| case COSE_Algorithm_AES_CCM_16_64_256: |
| if (!AES_CCM_Encrypt(pcose, 64, 16, 256, pbAuthData, cbAuthData, perr)) goto errorReturn; |
| break; |
| |
| case COSE_Algorithm_AES_CCM_16_128_128: |
| if (!AES_CCM_Encrypt(pcose, 128, 16, 128, pbAuthData, cbAuthData, perr)) goto errorReturn; |
| break; |
| |
| case COSE_Algorithm_AES_CCM_16_128_256: |
| if (!AES_CCM_Encrypt(pcose, 128, 16, 256, pbAuthData, cbAuthData, perr)) goto errorReturn; |
| break; |
| |
| case COSE_Algorithm_AES_CCM_64_64_128: |
| if (!AES_CCM_Encrypt(pcose, 64, 64, 128, pbAuthData, cbAuthData, perr)) goto errorReturn; |
| break; |
| |
| case COSE_Algorithm_AES_CCM_64_64_256: |
| if (!AES_CCM_Encrypt(pcose, 64, 64, 256, pbAuthData, cbAuthData, perr)) goto errorReturn; |
| break; |
| |
| case COSE_Algorithm_AES_CCM_64_128_128: |
| if (!AES_CCM_Encrypt(pcose, 128, 64, 128, pbAuthData, cbAuthData, perr)) goto errorReturn; |
| break; |
| |
| case COSE_Algorithm_AES_CCM_64_128_256: |
| if (!AES_CCM_Encrypt(pcose, 128, 64, 256, pbAuthData, cbAuthData, perr)) goto errorReturn; |
| break; |
| #endif |
| |
| case COSE_Algorithm_AES_GCM_128: |
| if (!AES_GCM_Encrypt(pcose, 128, pbAuthData, cbAuthData, perr)) goto errorReturn; |
| break; |
| |
| case COSE_Algorithm_AES_GCM_192: |
| if (!AES_GCM_Encrypt(pcose, 192, pbAuthData, cbAuthData, perr)) goto errorReturn; |
| break; |
| |
| case COSE_Algorithm_AES_GCM_256: |
| if (!AES_GCM_Encrypt(pcose, 256, pbAuthData, cbAuthData, perr)) goto errorReturn; |
| break; |
| |
| default: |
| FAIL_CONDITION(COSE_ERR_INVALID_PARAMETER); |
| } |
| |
| for (pri = pcose->m_recipientFirst; pri != NULL; pri = pri->m_recipientNext) { |
| if (!_COSE_Recipient_encrypt(pri, pcose->pbKey, (int) pcose->cbKey, perr)) goto errorReturn; |
| } |
| |
| // Figure out the clean up |
| |
| if (pbAuthData != NULL) COSE_FREE(pbAuthData, context); |
| if (pAuthData != NULL) cn_cbor_free(pAuthData CBOR_CONTEXT_PARAM); |
| |
| return true; |
| |
| errorReturn: |
| if (pbAuthData != NULL) COSE_FREE(pbAuthData, context); |
| if (pAuthData != NULL) cn_cbor_free(pAuthData CBOR_CONTEXT_PARAM); |
| if (ptmp != NULL) cn_cbor_free(ptmp CBOR_CONTEXT_PARAM); |
| return false; |
| } |
| |
| 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; |
| } |
| |
| 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(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); |
| } |
| |
| bool COSE_Encrypt_AddRecipient(HCOSE_ENCRYPT hEnc, HCOSE_RECIPIENT hRecip, cose_errback * perr) |
| { |
| COSE_RecipientInfo * pRecip; |
| COSE_Encrypt * pEncrypt; |
| cn_cbor * pRecipients = NULL; |
| #ifdef USE_CBOR_CONTEXT |
| cn_cbor_context * context; |
| #endif |
| cn_cbor_errback cbor_error; |
| |
| CHECK_CONDITION(IsValidEncryptHandle(hEnc), COSE_ERR_INVALID_PARAMETER); |
| CHECK_CONDITION(IsValidRecipientHandle(hRecip), COSE_ERR_INVALID_PARAMETER); |
| |
| pEncrypt = (COSE_Encrypt *)hEnc; |
| pRecip = (COSE_RecipientInfo *)hRecip; |
| |
| #ifdef USE_CBOR_CONTEXT |
| context = &pEncrypt->m_message.m_allocContext; |
| #endif // USE_CBOR_CONTEXT |
| |
| pRecip->m_recipientNext = pEncrypt->m_recipientFirst; |
| pEncrypt->m_recipientFirst = pRecip; |
| |
| pRecipients = _COSE_arrayget_int(&pEncrypt->m_message, INDEX_RECIPIENTS); |
| if (pRecipients == NULL) { |
| pRecipients = cn_cbor_array_create(CBOR_CONTEXT_PARAM_COMMA &cbor_error); |
| CHECK_CONDITION_CBOR(pRecipients != NULL, cbor_error); |
| |
| if (!_COSE_array_replace(&pEncrypt->m_message, pRecipients, INDEX_RECIPIENTS, CBOR_CONTEXT_PARAM_COMMA &cbor_error)) { |
| CN_CBOR_FREE(pRecipients, context); |
| if (perr != NULL) perr->err = _MapFromCBOR(cbor_error); |
| goto errorReturn; |
| } |
| } |
| |
| CHECK_CONDITION_CBOR(cn_cbor_array_append(pRecipients, pRecip->m_encrypt.m_message.m_cbor, &cbor_error), cbor_error); |
| |
| return true; |
| |
| errorReturn: |
| return false; |
| } |