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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
#ifndef CEPH_CRYPTO_H
#define CEPH_CRYPTO_H
#include "acconfig.h"
#include <stdexcept>
#include "include/common_fwd.h"
#include "include/buffer.h"
#include "include/types.h"
#define CEPH_CRYPTO_MD5_DIGESTSIZE 16
#define CEPH_CRYPTO_HMACSHA1_DIGESTSIZE 20
#define CEPH_CRYPTO_SHA1_DIGESTSIZE 20
#define CEPH_CRYPTO_HMACSHA256_DIGESTSIZE 32
#define CEPH_CRYPTO_SHA256_DIGESTSIZE 32
#define CEPH_CRYPTO_SHA512_DIGESTSIZE 64
#include <openssl/evp.h>
#include <openssl/ossl_typ.h>
#include <openssl/hmac.h>
#include "include/ceph_assert.h"
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
extern "C" {
const EVP_MD *EVP_md5(void);
const EVP_MD *EVP_sha1(void);
const EVP_MD *EVP_sha256(void);
const EVP_MD *EVP_sha512(void);
}
namespace TOPNSPC::crypto {
void assert_init();
void init();
void shutdown(bool shared=true);
void zeroize_for_security(void *s, size_t n);
class DigestException : public std::runtime_error
{
public:
DigestException(const char* what_arg) : runtime_error(what_arg)
{}
};
namespace ssl {
class OpenSSLDigest {
private:
EVP_MD_CTX *mpContext;
const EVP_MD *mpType;
EVP_MD *mpType_FIPS = nullptr;
public:
OpenSSLDigest (const EVP_MD *_type);
~OpenSSLDigest ();
void Restart();
void SetFlags(int flags);
void Update (const unsigned char *input, size_t length);
void Final (unsigned char *digest);
};
class MD5 : public OpenSSLDigest {
public:
static constexpr size_t digest_size = CEPH_CRYPTO_MD5_DIGESTSIZE;
MD5 () : OpenSSLDigest(EVP_md5()) { }
};
class SHA1 : public OpenSSLDigest {
public:
static constexpr size_t digest_size = CEPH_CRYPTO_SHA1_DIGESTSIZE;
SHA1 () : OpenSSLDigest(EVP_sha1()) { }
};
class SHA256 : public OpenSSLDigest {
public:
static constexpr size_t digest_size = CEPH_CRYPTO_SHA256_DIGESTSIZE;
SHA256 () : OpenSSLDigest(EVP_sha256()) { }
};
class SHA512 : public OpenSSLDigest {
public:
static constexpr size_t digest_size = CEPH_CRYPTO_SHA512_DIGESTSIZE;
SHA512 () : OpenSSLDigest(EVP_sha512()) { }
};
# if OPENSSL_VERSION_NUMBER < 0x10100000L
class HMAC {
private:
HMAC_CTX mContext;
const EVP_MD *mpType;
public:
HMAC (const EVP_MD *type, const unsigned char *key, size_t length)
: mpType(type) {
// the strict FIPS zeroization doesn't seem to be necessary here.
// just in the case.
::TOPNSPC::crypto::zeroize_for_security(&mContext, sizeof(mContext));
const auto r = HMAC_Init_ex(&mContext, key, length, mpType, nullptr);
if (r != 1) {
throw DigestException("HMAC_Init_ex() failed");
}
}
~HMAC () {
HMAC_CTX_cleanup(&mContext);
}
void Restart () {
const auto r = HMAC_Init_ex(&mContext, nullptr, 0, mpType, nullptr);
if (r != 1) {
throw DigestException("HMAC_Init_ex() failed");
}
}
void Update (const unsigned char *input, size_t length) {
if (length) {
const auto r = HMAC_Update(&mContext, input, length);
if (r != 1) {
throw DigestException("HMAC_Update() failed");
}
}
}
void Final (unsigned char *digest) {
unsigned int s;
const auto r = HMAC_Final(&mContext, digest, &s);
if (r != 1) {
throw DigestException("HMAC_Final() failed");
}
}
};
# else
class HMAC {
private:
HMAC_CTX *mpContext;
public:
HMAC (const EVP_MD *type, const unsigned char *key, size_t length)
: mpContext(HMAC_CTX_new()) {
const auto r = HMAC_Init_ex(mpContext, key, length, type, nullptr);
if (r != 1) {
throw DigestException("HMAC_Init_ex() failed");
}
}
~HMAC () {
HMAC_CTX_free(mpContext);
}
void Restart () {
const EVP_MD * const type = HMAC_CTX_get_md(mpContext);
const auto r = HMAC_Init_ex(mpContext, nullptr, 0, type, nullptr);
if (r != 1) {
throw DigestException("HMAC_Init_ex() failed");
}
}
void Update (const unsigned char *input, size_t length) {
if (length) {
const auto r = HMAC_Update(mpContext, input, length);
if (r != 1) {
throw DigestException("HMAC_Update() failed");
}
}
}
void Final (unsigned char *digest) {
unsigned int s;
const auto r = HMAC_Final(mpContext, digest, &s);
if (r != 1) {
throw DigestException("HMAC_Final() failed");
}
}
};
# endif // OPENSSL_VERSION_NUMBER < 0x10100000L
struct HMACSHA1 : public HMAC {
HMACSHA1 (const unsigned char *key, size_t length)
: HMAC(EVP_sha1(), key, length) {
}
};
struct HMACSHA256 : public HMAC {
HMACSHA256 (const unsigned char *key, size_t length)
: HMAC(EVP_sha256(), key, length) {
}
};
}
using ssl::SHA256;
using ssl::MD5;
using ssl::SHA1;
using ssl::SHA512;
using ssl::HMACSHA256;
using ssl::HMACSHA1;
template<class Digest>
auto digest(const ceph::buffer::list& bl)
{
unsigned char fingerprint[Digest::digest_size];
Digest gen;
for (auto& p : bl.buffers()) {
gen.Update((const unsigned char *)p.c_str(), p.length());
}
gen.Final(fingerprint);
return sha_digest_t<Digest::digest_size>{fingerprint};
}
}
#pragma clang diagnostic pop
#pragma GCC diagnostic pop
#endif
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