std::string DecryptPwd(const char* pPwd, const char*key)
{
Des_SetKey(key);
char szRet[2048] = {0};
char* pszRet = szRet;
int nLen = 2048;
DeTrandcode2(pPwd, strlen(pPwd), pszRet, nLen);
nLen = ((nLen + 7) / 8) * 8;
char *dataTmp = new char[nLen+2];
memset(dataTmp,0,sizeof(char)*(nLen+2));
memcpy(dataTmp,pszRet,sizeof(char)*nLen);
int pos = 0;
while(pos < nLen)
{
Des_Run(dataTmp+pos,dataTmp+pos,DECRYPT);
pos += 8;
}
//char szRet2[1024] = {0};
//memset(szRet2,0,sizeof(char)*(1024));
//memcpy(szRet2,dataTmp,sizeof(char)*1024);
std::string strRet = Run_DePadPwd(dataTmp, nLen);
delete [] dataTmp;
return strRet;
}
std::string EncryptPwd(const char* pPwd, const char*key)
{
Des_SetKey(key);
int pos = 0;
int length = strlen(pPwd);
char* pPadStr = (char*)malloc(length*sizeof(char)*2+1);
memset(pPadStr, 0, length*sizeof(char)*2 + 1);
Run_PadPwd(pPwd, pPadStr);
int padLen = (length*sizeof(char))*2 + 2;
padLen = ((padLen + 7)/8)*8;
char* dataTmp = (char*)malloc(sizeof(char)*(padLen + 2));
memset(dataTmp, 0, sizeof(char)*(padLen + 2));
memcpy(dataTmp, pPadStr, length*sizeof(char)*2 + 1);
while(pos < padLen)
{
Des_Run(dataTmp + pos, dataTmp + pos, ENCRYPT);
pos += 8;
}
std::string strEncode = Transcode2(dataTmp, sizeof(char)*(padLen));
free(dataTmp);
free(pPadStr);
return strEncode;
}
int des_test()
{
const byte vector[] = { /* "now is the time for all " w/o trailing 0 */
0x6e,0x6f,0x77,0x20,0x69,0x73,0x20,0x74,
0x68,0x65,0x20,0x74,0x69,0x6d,0x65,0x20,
0x66,0x6f,0x72,0x20,0x61,0x6c,0x6c,0x20
};
byte plain[24];
byte cipher[24];
Des enc;
Des dec;
const byte key[] =
{
0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef
};
const byte iv[] =
{
0x12,0x34,0x56,0x78,0x90,0xab,0xcd,0xef
};
const byte verify[] =
{
0x8b,0x7c,0x52,0xb0,0x01,0x2b,0x6c,0xb8,
0x4f,0x0f,0xeb,0xf3,0xfb,0x5f,0x86,0x73,
0x15,0x85,0xb3,0x22,0x4b,0x86,0x2b,0x4b
};
Des_SetKey(&enc, key, iv, DES_ENCRYPTION);
Des_CbcEncrypt(&enc, cipher, vector, sizeof(vector));
Des_SetKey(&dec, key, iv, DES_DECRYPTION);
Des_CbcDecrypt(&dec, plain, cipher, sizeof(cipher));
if (memcmp(plain, vector, sizeof(plain)))
return -31;
if (memcmp(cipher, verify, sizeof(cipher)))
return -32;
return 0;
}
/* build PKCS#7 envelopedData content type, return enveloped size */
int PKCS7_EncodeEnvelopedData(PKCS7* pkcs7, byte* output, word32 outputSz)
{
int i, ret = 0, idx = 0;
int totalSz = 0, padSz = 0, desOutSz = 0;
int contentInfoSeqSz, outerContentTypeSz, outerContentSz;
byte contentInfoSeq[MAX_SEQ_SZ];
byte outerContentType[MAX_ALGO_SZ];
byte outerContent[MAX_SEQ_SZ];
int envDataSeqSz, verSz;
byte envDataSeq[MAX_SEQ_SZ];
byte ver[MAX_VERSION_SZ];
RNG rng;
int contentKeyEncSz, blockKeySz;
int dynamicFlag = 0;
byte contentKeyPlain[MAX_CONTENT_KEY_LEN];
byte contentKeyEnc[MAX_ENCRYPTED_KEY_SZ];
byte* plain;
byte* encryptedContent;
int recipSz, recipSetSz;
byte recip[MAX_RECIP_SZ];
byte recipSet[MAX_SET_SZ];
int encContentOctetSz, encContentSeqSz, contentTypeSz;
int contentEncAlgoSz, ivOctetStringSz;
byte encContentSeq[MAX_SEQ_SZ];
byte contentType[MAX_ALGO_SZ];
byte contentEncAlgo[MAX_ALGO_SZ];
byte tmpIv[DES_BLOCK_SIZE];
byte ivOctetString[MAX_OCTET_STR_SZ];
byte encContentOctet[MAX_OCTET_STR_SZ];
if (pkcs7 == NULL || pkcs7->content == NULL || pkcs7->contentSz == 0 ||
pkcs7->encryptOID == 0 || pkcs7->singleCert == NULL)
return BAD_FUNC_ARG;
if (output == NULL || outputSz == 0)
return BAD_FUNC_ARG;
/* PKCS#7 only supports DES, 3DES for now */
switch (pkcs7->encryptOID) {
case DESb:
blockKeySz = DES_KEYLEN;
break;
case DES3b:
blockKeySz = DES3_KEYLEN;
break;
default:
CYASSL_MSG("Unsupported content cipher type");
return ALGO_ID_E;
};
/* outer content type */
outerContentTypeSz = SetContentType(ENVELOPED_DATA, outerContentType);
/* version, defined as 0 in RFC 2315 */
verSz = SetMyVersion(0, ver, 0);
/* generate random content encryption key */
ret = InitRng(&rng);
if (ret != 0)
return ret;
ret = RNG_GenerateBlock(&rng, contentKeyPlain, blockKeySz);
if (ret != 0)
return ret;
/* build RecipientInfo, only handle 1 for now */
recipSz = CreateRecipientInfo(pkcs7->singleCert, pkcs7->singleCertSz, RSAk,
blockKeySz, &rng, contentKeyPlain,
contentKeyEnc, &contentKeyEncSz, recip,
MAX_RECIP_SZ);
if (recipSz < 0) {
CYASSL_MSG("Failed to create RecipientInfo");
return recipSz;
}
recipSetSz = SetSet(recipSz, recipSet);
/* generate IV for block cipher */
ret = RNG_GenerateBlock(&rng, tmpIv, DES_BLOCK_SIZE);
if (ret != 0)
return ret;
/* EncryptedContentInfo */
contentTypeSz = SetContentType(pkcs7->contentOID, contentType);
if (contentTypeSz == 0)
return BAD_FUNC_ARG;
/* allocate encrypted content buffer, pad if necessary, PKCS#7 padding */
padSz = DES_BLOCK_SIZE - (pkcs7->contentSz % DES_BLOCK_SIZE);
desOutSz = pkcs7->contentSz + padSz;
if (padSz != 0) {
plain = XMALLOC(desOutSz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (plain == NULL) {
return MEMORY_E;
}
XMEMCPY(plain, pkcs7->content, pkcs7->contentSz);
dynamicFlag = 1;
for (i = 0; i < padSz; i++) {
plain[pkcs7->contentSz + i] = padSz;
}
} else {
plain = pkcs7->content;
desOutSz = pkcs7->contentSz;
}
encryptedContent = XMALLOC(desOutSz, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (encryptedContent == NULL) {
if (dynamicFlag)
XFREE(plain, NULL, DYNAMIC_TYPE_TMP_BUFFER);
return MEMORY_E;
}
/* put together IV OCTET STRING */
ivOctetStringSz = SetOctetString(DES_BLOCK_SIZE, ivOctetString);
/* build up our ContentEncryptionAlgorithmIdentifier sequence,
* adding (ivOctetStringSz + DES_BLOCK_SIZE) for IV OCTET STRING */
contentEncAlgoSz = SetAlgoID(pkcs7->encryptOID, contentEncAlgo,
blkType, ivOctetStringSz + DES_BLOCK_SIZE);
if (contentEncAlgoSz == 0)
return BAD_FUNC_ARG;
/* encrypt content */
if (pkcs7->encryptOID == DESb) {
Des des;
ret = Des_SetKey(&des, contentKeyPlain, tmpIv, DES_ENCRYPTION);
if (ret == 0)
Des_CbcEncrypt(&des, encryptedContent, plain, desOutSz);
if (ret != 0) {
XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (dynamicFlag)
XFREE(plain, NULL, DYNAMIC_TYPE_TMP_BUFFER);
return ret;
}
}
else if (pkcs7->encryptOID == DES3b) {
Des3 des3;
ret = Des3_SetKey(&des3, contentKeyPlain, tmpIv, DES_ENCRYPTION);
if (ret == 0)
ret = Des3_CbcEncrypt(&des3, encryptedContent, plain, desOutSz);
if (ret != 0) {
XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (dynamicFlag)
XFREE(plain, NULL, DYNAMIC_TYPE_TMP_BUFFER);
return ret;
}
}
encContentOctetSz = SetImplicit(ASN_OCTET_STRING, 0,
desOutSz, encContentOctet);
encContentSeqSz = SetSequence(contentTypeSz + contentEncAlgoSz +
ivOctetStringSz + DES_BLOCK_SIZE +
encContentOctetSz + desOutSz, encContentSeq);
/* keep track of sizes for outer wrapper layering */
totalSz = verSz + recipSetSz + recipSz + encContentSeqSz + contentTypeSz +
contentEncAlgoSz + ivOctetStringSz + DES_BLOCK_SIZE +
encContentOctetSz + desOutSz;
/* EnvelopedData */
envDataSeqSz = SetSequence(totalSz, envDataSeq);
totalSz += envDataSeqSz;
/* outer content */
outerContentSz = SetExplicit(0, totalSz, outerContent);
totalSz += outerContentTypeSz;
totalSz += outerContentSz;
/* ContentInfo */
contentInfoSeqSz = SetSequence(totalSz, contentInfoSeq);
totalSz += contentInfoSeqSz;
if (totalSz > (int)outputSz) {
CYASSL_MSG("Pkcs7_encrypt output buffer too small");
XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (dynamicFlag)
XFREE(plain, NULL, DYNAMIC_TYPE_TMP_BUFFER);
return BUFFER_E;
}
XMEMCPY(output + idx, contentInfoSeq, contentInfoSeqSz);
idx += contentInfoSeqSz;
XMEMCPY(output + idx, outerContentType, outerContentTypeSz);
idx += outerContentTypeSz;
XMEMCPY(output + idx, outerContent, outerContentSz);
idx += outerContentSz;
XMEMCPY(output + idx, envDataSeq, envDataSeqSz);
idx += envDataSeqSz;
XMEMCPY(output + idx, ver, verSz);
idx += verSz;
XMEMCPY(output + idx, recipSet, recipSetSz);
idx += recipSetSz;
XMEMCPY(output + idx, recip, recipSz);
idx += recipSz;
XMEMCPY(output + idx, encContentSeq, encContentSeqSz);
idx += encContentSeqSz;
XMEMCPY(output + idx, contentType, contentTypeSz);
idx += contentTypeSz;
XMEMCPY(output + idx, contentEncAlgo, contentEncAlgoSz);
idx += contentEncAlgoSz;
XMEMCPY(output + idx, ivOctetString, ivOctetStringSz);
idx += ivOctetStringSz;
XMEMCPY(output + idx, tmpIv, DES_BLOCK_SIZE);
idx += DES_BLOCK_SIZE;
XMEMCPY(output + idx, encContentOctet, encContentOctetSz);
idx += encContentOctetSz;
XMEMCPY(output + idx, encryptedContent, desOutSz);
idx += desOutSz;
#ifdef NO_RC4
FreeRng(&rng);
#endif
XMEMSET(contentKeyPlain, 0, MAX_CONTENT_KEY_LEN);
XMEMSET(contentKeyEnc, 0, MAX_ENCRYPTED_KEY_SZ);
if (dynamicFlag)
XFREE(plain, NULL, DYNAMMIC_TYPE_TMP_BUFFER);
XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER);
return idx;
}
/* unwrap and decrypt PKCS#7 envelopedData object, return decoded size */
CYASSL_API int PKCS7_DecodeEnvelopedData(PKCS7* pkcs7, byte* pkiMsg,
word32 pkiMsgSz, byte* output,
word32 outputSz)
{
int recipFound = 0;
int ret, version, length;
word32 savedIdx = 0, idx = 0;
word32 contentType, encOID;
byte issuerHash[SHA_DIGEST_SIZE];
mp_int serialNum;
int encryptedKeySz, keySz;
byte tmpIv[DES_BLOCK_SIZE];
byte encryptedKey[MAX_ENCRYPTED_KEY_SZ];
byte* decryptedKey = NULL;
RsaKey privKey;
int encryptedContentSz;
byte padLen;
byte* encryptedContent = NULL;
if (pkcs7 == NULL || pkcs7->singleCert == NULL ||
pkcs7->singleCertSz == 0 || pkcs7->privateKey == NULL ||
pkcs7->privateKeySz == 0)
return BAD_FUNC_ARG;
if (pkiMsg == NULL || pkiMsgSz == 0 ||
output == NULL || outputSz == 0)
return BAD_FUNC_ARG;
/* load private key */
ret = InitRsaKey(&privKey, 0);
if (ret != 0) return ret;
ret = RsaPrivateKeyDecode(pkcs7->privateKey, &idx, &privKey,
pkcs7->privateKeySz);
if (ret != 0) {
CYASSL_MSG("Failed to decode RSA private key");
return ret;
}
idx = 0;
/* read past ContentInfo, verify type is envelopedData */
if (GetSequence(pkiMsg, &idx, &length, pkiMsgSz) < 0)
return ASN_PARSE_E;
if (GetContentType(pkiMsg, &idx, &contentType, pkiMsgSz) < 0)
return ASN_PARSE_E;
if (contentType != ENVELOPED_DATA) {
CYASSL_MSG("PKCS#7 input not of type EnvelopedData");
return PKCS7_OID_E;
}
if (pkiMsg[idx++] != (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | 0))
return ASN_PARSE_E;
if (GetLength(pkiMsg, &idx, &length, pkiMsgSz) < 0)
return ASN_PARSE_E;
/* remove EnvelopedData and version */
if (GetSequence(pkiMsg, &idx, &length, pkiMsgSz) < 0)
return ASN_PARSE_E;
if (GetMyVersion(pkiMsg, &idx, &version) < 0)
return ASN_PARSE_E;
if (version != 0) {
CYASSL_MSG("PKCS#7 envelopedData needs to be of version 0");
return ASN_VERSION_E;
}
/* walk through RecipientInfo set, find correct recipient */
if (GetSet(pkiMsg, &idx, &length, pkiMsgSz) < 0)
return ASN_PARSE_E;
savedIdx = idx;
recipFound = 0;
/* when looking for next recipient, use first sequence and version to
* indicate there is another, if not, move on */
while(recipFound == 0) {
/* remove RecipientInfo, if we don't have a SEQUENCE, back up idx to
* last good saved one */
if (GetSequence(pkiMsg, &idx, &length, pkiMsgSz) < 0) {
idx = savedIdx;
break;
}
if (GetMyVersion(pkiMsg, &idx, &version) < 0) {
idx = savedIdx;
break;
}
if (version != 0)
return ASN_VERSION_E;
/* remove IssuerAndSerialNumber */
if (GetSequence(pkiMsg, &idx, &length, pkiMsgSz) < 0)
return ASN_PARSE_E;
if (GetNameHash(pkiMsg, &idx, issuerHash, pkiMsgSz) < 0)
return ASN_PARSE_E;
/* if we found correct recipient, issuer hashes will match */
if (XMEMCMP(issuerHash, pkcs7->issuerHash, SHA_DIGEST_SIZE) == 0) {
recipFound = 1;
}
if (GetInt(&serialNum, pkiMsg, &idx, pkiMsgSz) < 0)
return ASN_PARSE_E;
mp_clear(&serialNum);
if (GetAlgoId(pkiMsg, &idx, &encOID, pkiMsgSz) < 0)
return ASN_PARSE_E;
/* key encryption algorithm must be RSA for now */
if (encOID != RSAk)
return ALGO_ID_E;
/* read encryptedKey */
if (pkiMsg[idx++] != ASN_OCTET_STRING)
return ASN_PARSE_E;
if (GetLength(pkiMsg, &idx, &encryptedKeySz, pkiMsgSz) < 0)
return ASN_PARSE_E;
if (recipFound == 1)
XMEMCPY(encryptedKey, &pkiMsg[idx], encryptedKeySz);
idx += encryptedKeySz;
/* update good idx */
savedIdx = idx;
}
if (recipFound == 0) {
CYASSL_MSG("No recipient found in envelopedData that matches input");
return PKCS7_RECIP_E;
}
/* remove EncryptedContentInfo */
if (GetSequence(pkiMsg, &idx, &length, pkiMsgSz) < 0)
return ASN_PARSE_E;
if (GetContentType(pkiMsg, &idx, &contentType, pkiMsgSz) < 0)
return ASN_PARSE_E;
if (GetAlgoId(pkiMsg, &idx, &encOID, pkiMsgSz) < 0)
return ASN_PARSE_E;
/* get block cipher IV, stored in OPTIONAL parameter of AlgoID */
if (pkiMsg[idx++] != ASN_OCTET_STRING)
return ASN_PARSE_E;
if (GetLength(pkiMsg, &idx, &length, pkiMsgSz) < 0)
return ASN_PARSE_E;
if (length != DES_BLOCK_SIZE) {
CYASSL_MSG("Incorrect IV length, must be of DES_BLOCK_SIZE");
return ASN_PARSE_E;
}
XMEMCPY(tmpIv, &pkiMsg[idx], length);
idx += length;
/* read encryptedContent, cont[0] */
if (pkiMsg[idx++] != (ASN_CONTEXT_SPECIFIC | 0))
return ASN_PARSE_E;
if (GetLength(pkiMsg, &idx, &encryptedContentSz, pkiMsgSz) < 0)
return ASN_PARSE_E;
encryptedContent = XMALLOC(encryptedContentSz, NULL,
DYNAMIC_TYPE_TMP_BUFFER);
XMEMCPY(encryptedContent, &pkiMsg[idx], encryptedContentSz);
/* decrypt encryptedKey */
keySz = RsaPrivateDecryptInline(encryptedKey, encryptedKeySz,
&decryptedKey, &privKey);
FreeRsaKey(&privKey);
if (keySz <= 0)
return keySz;
/* decrypt encryptedContent */
if (encOID == DESb) {
Des des;
ret = Des_SetKey(&des, decryptedKey, tmpIv, DES_DECRYPTION);
if (ret == 0)
Des_CbcDecrypt(&des, encryptedContent, encryptedContent,
encryptedContentSz);
if (ret != 0) {
XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER);
return ret;
}
}
else if (encOID == DES3b) {
Des3 des;
ret = Des3_SetKey(&des, decryptedKey, tmpIv, DES_DECRYPTION);
if (ret == 0)
ret = Des3_CbcDecrypt(&des, encryptedContent, encryptedContent,
encryptedContentSz);
if (ret != 0) {
XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER);
return ret;
}
} else {
CYASSL_MSG("Unsupported content encryption OID type");
return ALGO_ID_E;
}
padLen = encryptedContent[encryptedContentSz-1];
/* copy plaintext to output */
XMEMCPY(output, encryptedContent, encryptedContentSz - padLen);
/* free memory, zero out keys */
XMEMSET(encryptedKey, 0, MAX_ENCRYPTED_KEY_SZ);
XMEMSET(encryptedContent, 0, encryptedContentSz);
XFREE(encryptedContent, NULL, DYNAMIC_TYPE_TMP_BUFFER);
return encryptedContentSz - padLen;
}
