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#pragma once
/**
@file
@brief wrap openssl
@author MITSUNARI Shigeo(@herumi)
*/
#include <cybozu/exception.hpp>
#ifdef __APPLE__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#endif
#if 0 //#ifdef __APPLE__
#define COMMON_DIGEST_FOR_OPENSSL
#include <CommonCrypto/CommonDigest.h>
#include <CommonCrypto/CommonHMAC.h>
#define SHA1 CC_SHA1
#define SHA224 CC_SHA224
#define SHA256 CC_SHA256
#define SHA384 CC_SHA384
#define SHA512 CC_SHA512
#else
#include <openssl/hmac.h>
#include <openssl/evp.h>
#include <openssl/sha.h>
#endif
#ifdef _MSC_VER
#include <cybozu/link_libeay32.hpp>
#endif
namespace cybozu {
namespace crypto {
class Hash {
public:
enum Name {
N_SHA1,
N_SHA224,
N_SHA256,
N_SHA384,
N_SHA512
};
private:
Name name_;
size_t hashSize_;
union {
SHA_CTX sha1;
SHA256_CTX sha256;
SHA512_CTX sha512;
} ctx_;
public:
static inline size_t getSize(Name name)
{
switch (name) {
case N_SHA1: return SHA_DIGEST_LENGTH;
case N_SHA224: return SHA224_DIGEST_LENGTH;
case N_SHA256: return SHA256_DIGEST_LENGTH;
case N_SHA384: return SHA384_DIGEST_LENGTH;
case N_SHA512: return SHA512_DIGEST_LENGTH;
default:
throw cybozu::Exception("crypto:Hash:getSize") << name;
}
}
static inline const char *getName(Name name)
{
switch (name) {
case N_SHA1: return "sha1";
case N_SHA224: return "sha224";
case N_SHA256: return "sha256";
case N_SHA384: return "sha384";
case N_SHA512: return "sha512";
default:
throw cybozu::Exception("crypto:Hash:getName") << name;
}
}
static inline Name getName(const std::string& nameStr)
{
static const struct {
const char *nameStr;
Name name;
} tbl[] = {
{ "sha1", N_SHA1 },
{ "sha224", N_SHA224 },
{ "sha256", N_SHA256 },
{ "sha384", N_SHA384 },
{ "sha512", N_SHA512 },
};
for (size_t i = 0; i < CYBOZU_NUM_OF_ARRAY(tbl); i++) {
if (nameStr == tbl[i].nameStr) return tbl[i].name;
}
throw cybozu::Exception("crypto:Hash:getName") << nameStr;
}
explicit Hash(Name name = N_SHA1)
: name_(name)
, hashSize_(getSize(name))
{
reset();
}
void update(const void *buf, size_t bufSize)
{
switch (name_) {
case N_SHA1: SHA1_Update(&ctx_.sha1, buf, bufSize); break;
case N_SHA224: SHA224_Update(&ctx_.sha256, buf, bufSize); break;
case N_SHA256: SHA256_Update(&ctx_.sha256, buf, bufSize); break;
case N_SHA384: SHA384_Update(&ctx_.sha512, buf, bufSize); break;
case N_SHA512: SHA512_Update(&ctx_.sha512, buf, bufSize); break;
}
}
void update(const std::string& buf)
{
update(buf.c_str(), buf.size());
}
void reset()
{
switch (name_) {
case N_SHA1: SHA1_Init(&ctx_.sha1); break;
case N_SHA224: SHA224_Init(&ctx_.sha256); break;
case N_SHA256: SHA256_Init(&ctx_.sha256); break;
case N_SHA384: SHA384_Init(&ctx_.sha512); break;
case N_SHA512: SHA512_Init(&ctx_.sha512); break;
default:
throw cybozu::Exception("crypto:Hash:rset") << name_;
}
}
/*
md must have hashSize byte
@note clear inner buffer after calling digest
*/
void digest(void *out, const void *buf, size_t bufSize)
{
update(buf, bufSize);
unsigned char *md = reinterpret_cast<unsigned char*>(out);
switch (name_) {
case N_SHA1: SHA1_Final(md, &ctx_.sha1); break;
case N_SHA224: SHA224_Final(md, &ctx_.sha256); break;
case N_SHA256: SHA256_Final(md, &ctx_.sha256); break;
case N_SHA384: SHA384_Final(md, &ctx_.sha512); break;
case N_SHA512: SHA512_Final(md, &ctx_.sha512); break;
default:
throw cybozu::Exception("crypto:Hash:digest") << name_;
}
reset();
}
std::string digest(const void *buf, size_t bufSize)
{
std::string ret;
ret.resize(hashSize_);
digest(&ret[0], buf, bufSize);
return ret;
}
std::string digest(const std::string& buf = "")
{
return digest(buf.c_str(), buf.size());
}
/*
out must have necessary size
@note return written size
*/
static inline size_t digest(void *out, Name name, const void *buf, size_t bufSize)
{
unsigned char *md = (unsigned char*)out;
const unsigned char *src = cybozu::cast<const unsigned char *>(buf);
switch (name) {
case N_SHA1: SHA1(src, bufSize, md); return 160 / 8;
case N_SHA224: SHA224(src, bufSize, md); return 224 / 8;
case N_SHA256: SHA256(src, bufSize, md); return 256 / 8;
case N_SHA384: SHA384(src, bufSize, md); return 384 / 8;
case N_SHA512: SHA512(src, bufSize, md); return 512 / 8;
default:
return 0;
}
}
static inline std::string digest(Name name, const void *buf, size_t bufSize)
{
char md[128];
size_t size = digest(md, name, buf, bufSize);
if (size == 0) throw cybozu::Exception("crypt:Hash:digest") << name;
return std::string(md, size);
}
static inline std::string digest(Name name, const std::string& buf)
{
return digest(name, buf.c_str(), buf.size());
}
};
class Hmac {
const EVP_MD *evp_;
public:
explicit Hmac(Hash::Name name = Hash::N_SHA1)
{
switch (name) {
case Hash::N_SHA1: evp_ = EVP_sha1(); break;
case Hash::N_SHA224: evp_ = EVP_sha224(); break;
case Hash::N_SHA256: evp_ = EVP_sha256(); break;
case Hash::N_SHA384: evp_ = EVP_sha384(); break;
case Hash::N_SHA512: evp_ = EVP_sha512(); break;
default:
throw cybozu::Exception("crypto:Hmac:") << name;
}
}
std::string eval(const std::string& key, const std::string& data)
{
std::string out(EVP_MD_size(evp_) + 1, 0);
unsigned int outLen = 0;
if (HMAC(evp_, key.c_str(), static_cast<int>(key.size()),
cybozu::cast<const uint8_t *>(data.c_str()), data.size(), cybozu::cast<uint8_t *>(&out[0]), &outLen)) {
out.resize(outLen);
return out;
}
throw cybozu::Exception("crypto::Hamc::eval");
}
};
class Cipher {
const EVP_CIPHER *cipher_;
EVP_CIPHER_CTX *ctx_;
public:
enum Name {
N_AES128_CBC,
N_AES192_CBC,
N_AES256_CBC,
N_AES128_ECB, // be carefull to use
N_AES192_ECB, // be carefull to use
N_AES256_ECB, // be carefull to use
};
static inline size_t getSize(Name name)
{
switch (name) {
case N_AES128_CBC: return 128;
case N_AES192_CBC: return 192;
case N_AES256_CBC: return 256;
case N_AES128_ECB: return 128;
case N_AES192_ECB: return 192;
case N_AES256_ECB: return 256;
default:
throw cybozu::Exception("crypto:Cipher:getSize") << name;
}
}
enum Mode {
Decoding,
Encoding
};
explicit Cipher(Name name = N_AES128_CBC)
: cipher_(0)
, ctx_(0)
{
ctx_ = EVP_CIPHER_CTX_new();
if (ctx_ == 0) throw cybozu::Exception("crypto:Cipher:EVP_CIPHER_CTX_new");
switch (name) {
case N_AES128_CBC: cipher_ = EVP_aes_128_cbc(); break;
case N_AES192_CBC: cipher_ = EVP_aes_192_cbc(); break;
case N_AES256_CBC: cipher_ = EVP_aes_256_cbc(); break;
case N_AES128_ECB: cipher_ = EVP_aes_128_ecb(); break;
case N_AES192_ECB: cipher_ = EVP_aes_192_ecb(); break;
case N_AES256_ECB: cipher_ = EVP_aes_256_ecb(); break;
default:
throw cybozu::Exception("crypto:Cipher:Cipher:name") << (int)name;
}
}
~Cipher()
{
if (ctx_) EVP_CIPHER_CTX_free(ctx_);
}
/*
@note don't use padding = true
*/
void setup(Mode mode, const std::string& key, const std::string& iv, bool padding = false)
{
const int keyLen = static_cast<int>(key.size());
const int expectedKeyLen = EVP_CIPHER_key_length(cipher_);
if (keyLen != expectedKeyLen) {
throw cybozu::Exception("crypto:Cipher:setup:keyLen") << keyLen << expectedKeyLen;
}
int ret = EVP_CipherInit_ex(ctx_, cipher_, NULL, cybozu::cast<const uint8_t*>(key.c_str()), cybozu::cast<const uint8_t*>(iv.c_str()), mode == Encoding ? 1 : 0);
if (ret != 1) {
throw cybozu::Exception("crypto:Cipher:setup:EVP_CipherInit_ex") << ret;
}
ret = EVP_CIPHER_CTX_set_padding(ctx_, padding ? 1 : 0);
if (ret != 1) {
throw cybozu::Exception("crypto:Cipher:setup:EVP_CIPHER_CTX_set_padding") << ret;
}
/*
const int ivLen = static_cast<int>(iv.size());
const int expectedIvLen = EVP_CIPHER_CTX_iv_length(&ctx_);
if (ivLen != expectedIvLen) {
throw cybozu::Exception("crypto:Cipher:setup:ivLen") << ivLen << expectedIvLen;
}
*/
}
/*
the size of outBuf must be larger than inBufSize + blockSize
@retval positive or 0 : writeSize(+blockSize)
@retval -1 : error
*/
int update(char *outBuf, const char *inBuf, int inBufSize)
{
int outLen = 0;
int ret = EVP_CipherUpdate(ctx_, cybozu::cast<uint8_t*>(outBuf), &outLen, cybozu::cast<const uint8_t*>(inBuf), inBufSize);
if (ret != 1) return -1;
return outLen;
}
/*
return -1 if padding
@note don't use
*/
int finalize(char *outBuf)
{
int outLen = 0;
int ret = EVP_CipherFinal_ex(ctx_, cybozu::cast<uint8_t*>(outBuf), &outLen);
if (ret != 1) return -1;
return outLen;
}
};
} } // cybozu::crypto
#ifdef __APPLE__
#pragma GCC diagnostic pop
#endif
|
