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e79ce42ef4
wolfssl/cyassl/ctaocrypt/asn.h
John Safranek e79ce42ef4 Added checking of the key usage and extended key usage extensions in the 
certificates.
2014-04-10 16:50:14 -07:00

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/* asn.h
*
* Copyright (C) 2006-2013 wolfSSL Inc.
*
* This file is part of CyaSSL.
*
* CyaSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* CyaSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifndef NO_ASN
#ifndef CTAO_CRYPT_ASN_H
#define CTAO_CRYPT_ASN_H
#include <cyassl/ctaocrypt/types.h>
#include <cyassl/ctaocrypt/rsa.h>
#include <cyassl/ctaocrypt/dh.h>
#include <cyassl/ctaocrypt/dsa.h>
#include <cyassl/ctaocrypt/sha.h>
#include <cyassl/ctaocrypt/md5.h>
#include <cyassl/ctaocrypt/asn_public.h> /* public interface */
#ifdef HAVE_ECC
#include <cyassl/ctaocrypt/ecc.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
enum {
ISSUER = 0,
SUBJECT = 1,
EXTERNAL_SERIAL_SIZE = 32,
BEFORE = 0,
AFTER = 1
};
/* ASN Tags */
enum ASN_Tags {
ASN_BOOLEAN = 0x01,
ASN_INTEGER = 0x02,
ASN_BIT_STRING = 0x03,
ASN_OCTET_STRING = 0x04,
ASN_TAG_NULL = 0x05,
ASN_OBJECT_ID = 0x06,
ASN_ENUMERATED = 0x0a,
ASN_UTF8STRING = 0x0c,
ASN_SEQUENCE = 0x10,
ASN_SET = 0x11,
ASN_UTC_TIME = 0x17,
ASN_OTHER_TYPE = 0x00,
ASN_DNS_TYPE = 0x02,
ASN_GENERALIZED_TIME = 0x18,
CRL_EXTENSIONS = 0xa0,
ASN_EXTENSIONS = 0xa3,
ASN_LONG_LENGTH = 0x80
};
enum ASN_Flags{
ASN_CONSTRUCTED = 0x20,
ASN_CONTEXT_SPECIFIC = 0x80
};
enum DN_Tags {
ASN_COMMON_NAME = 0x03, /* CN */
ASN_SUR_NAME = 0x04, /* SN */
ASN_SERIAL_NUMBER = 0x05, /* serialNumber */
ASN_COUNTRY_NAME = 0x06, /* C */
ASN_LOCALITY_NAME = 0x07, /* L */
ASN_STATE_NAME = 0x08, /* ST */
ASN_ORG_NAME = 0x0a, /* O */
ASN_ORGUNIT_NAME = 0x0b /* OU */
};
enum PBES {
PBE_MD5_DES = 0,
PBE_SHA1_DES = 1,
PBE_SHA1_DES3 = 2,
PBE_SHA1_RC4_128 = 3,
PBES2 = 13 /* algo ID */
};
enum ENCRYPTION_TYPES {
DES_TYPE = 0,
DES3_TYPE = 1,
RC4_TYPE = 2
};
enum ECC_TYPES {
ECC_PREFIX_0 = 160,
ECC_PREFIX_1 = 161
};
enum Misc_ASN {
ASN_NAME_MAX = 256,
MAX_SALT_SIZE = 64, /* MAX PKCS Salt length */
MAX_IV_SIZE = 64, /* MAX PKCS Iv length */
MAX_KEY_SIZE = 64, /* MAX PKCS Key length */
PKCS5 = 5, /* PKCS oid tag */
PKCS5v2 = 6, /* PKCS #5 v2.0 */
PKCS12 = 12, /* PKCS #12 */
MAX_UNICODE_SZ = 256,
ASN_BOOL_SIZE = 2, /* including type */
SHA_SIZE = 20,
RSA_INTS = 8, /* RSA ints in private key */
MIN_DATE_SIZE = 13,
MAX_DATE_SIZE = 32,
ASN_GEN_TIME_SZ = 15, /* 7 numbers * 2 + Zulu tag */
MAX_ENCODED_SIG_SZ = 512,
MAX_SIG_SZ = 256,
MAX_ALGO_SZ = 20,
MAX_SEQ_SZ = 5, /* enum(seq | con) + length(4) */
MAX_SET_SZ = 5, /* enum(set | con) + length(4) */
MAX_OCTET_STR_SZ = 5, /* enum(set | con) + length(4) */
MAX_EXP_SZ = 5, /* enum(contextspec|con|exp) + length(4) */
MAX_PRSTR_SZ = 5, /* enum(prstr) + length(4) */
MAX_VERSION_SZ = 5, /* enum + id + version(byte) + (header(2))*/
MAX_ENCODED_DIG_SZ = 73, /* sha512 + enum(bit or octet) + legnth(4) */
MAX_RSA_INT_SZ = 517, /* RSA raw sz 4096 for bits + tag + len(4) */
MAX_NTRU_KEY_SZ = 610, /* NTRU 112 bit public key */
MAX_NTRU_ENC_SZ = 628, /* NTRU 112 bit DER public encoding */
MAX_LENGTH_SZ = 4, /* Max length size for DER encoding */
MAX_RSA_E_SZ = 16, /* Max RSA public e size */
MAX_CA_SZ = 32, /* Max encoded CA basic constraint length */
MAX_SN_SZ = 35, /* Max encoded serial number (INT) length */
#ifdef CYASSL_CERT_GEN
#ifdef CYASSL_CERT_REQ
/* Max encoded cert req attributes length */
MAX_ATTRIB_SZ = MAX_SEQ_SZ * 3 + (11 + MAX_SEQ_SZ) * 2 +
MAX_PRSTR_SZ + CTC_NAME_SIZE, /* 11 is the OID size */
#endif
#ifdef CYASSL_ALT_NAMES
MAX_EXTENSIONS_SZ = 1 + MAX_LENGTH_SZ + CTC_MAX_ALT_SIZE,
#else
MAX_EXTENSIONS_SZ = 1 + MAX_LENGTH_SZ + MAX_CA_SZ,
#endif
/* Max total extensions, id + len + others */
#endif
MAX_OCSP_EXT_SZ = 58, /* Max OCSP Extension length */
MAX_OCSP_NONCE_SZ = 18, /* OCSP Nonce size */
EIGHTK_BUF = 8192, /* Tmp buffer size */
MAX_PUBLIC_KEY_SZ = MAX_NTRU_ENC_SZ + MAX_ALGO_SZ + MAX_SEQ_SZ * 2
/* use bigger NTRU size */
};
enum Oid_Types {
hashType = 0,
sigType = 1,
keyType = 2,
curveType = 3,
blkType = 4
};
enum Hash_Sum {
MD2h = 646,
MD5h = 649,
SHAh = 88,
SHA256h = 414,
SHA384h = 415,
SHA512h = 416
};
enum Block_Sum {
DESb = 69,
DES3b = 652
};
enum Key_Sum {
DSAk = 515,
RSAk = 645,
NTRUk = 364,
ECDSAk = 518
};
enum Ecc_Sum {
ECC_256R1 = 526,
ECC_384R1 = 210,
ECC_521R1 = 211,
ECC_160R1 = 184,
ECC_192R1 = 520,
ECC_224R1 = 209
};
enum KDF_Sum {
PBKDF2_OID = 660
};
enum Extensions_Sum {
BASIC_CA_OID = 133,
ALT_NAMES_OID = 131,
CRL_DIST_OID = 145,
AUTH_INFO_OID = 69,
CA_ISSUER_OID = 117,
AUTH_KEY_OID = 149,
SUBJ_KEY_OID = 128,
CERT_POLICY_OID = 146,
KEY_USAGE_OID = 129, /* 2.5.29.15 */
INHIBIT_ANY_OID = 168, /* 2.5.29.54 */
EXT_KEY_USAGE_OID = 151, /* 2.5.29.37 */
};
enum CertificatePolicy_Sum {
CP_ANY_OID = 146 /* id-ce 32 0 */
};
enum SepHardwareName_Sum {
HW_NAME_OID = 79 /* 1.3.6.1.5.5.7.8.4 from RFC 4108*/
};
enum AuthInfo_Sum {
AIA_OCSP_OID = 116, /* 1.3.6.1.5.5.7.48.1 */
AIA_CA_ISSUER_OID = 117 /* 1.3.6.1.5.5.7.48.2 */
};
enum ExtKeyUsage_Sum { /* From RFC 5280 */
EKU_ANY_OID = 151, /* 2.5.29.37.0, anyExtendedKeyUsage */
EKU_SERVER_AUTH_OID = 71, /* 1.3.6.1.5.5.7.3.1, id-kp-serverAuth */
EKU_CLIENT_AUTH_OID = 72, /* 1.3.6.1.5.5.7.3.2, id-kp-clientAuth */
EKU_OCSP_SIGN_OID = 79, /* 1.3.6.1.5.5.7.3.9, OCSPSigning */
};
enum VerifyType {
NO_VERIFY = 0,
VERIFY = 1
};
/* Key usage extension bits */
#define KEYUSE_DIGITAL_SIG 0x0100
#define KEYUSE_CONTENT_COMMIT 0x0080
#define KEYUSE_KEY_ENCIPHER 0x0040
#define KEYUSE_DATA_ENCIPHER 0x0020
#define KEYUSE_KEY_AGREE 0x0010
#define KEYUSE_KEY_CERT_SIGN 0x0008
#define KEYUSE_CRL_SIGN 0x0004
#define KEYUSE_ENCIPHER_ONLY 0x0002
#define KEYUSE_DECIPHER_ONLY 0x0001
#define EXTKEYUSE_ANY 0x08
#define EXTKEYUSE_OCSP_SIGN 0x04
#define EXTKEYUSE_CLIENT_AUTH 0x02
#define EXTKEYUSE_SERVER_AUTH 0x01
typedef struct DNS_entry DNS_entry;
struct DNS_entry {
DNS_entry* next; /* next on DNS list */
char* name; /* actual DNS name */
};
struct DecodedName {
char* fullName;
int fullNameLen;
int entryCount;
int cnIdx;
int cnLen;
int snIdx;
int snLen;
int cIdx;
int cLen;
int lIdx;
int lLen;
int stIdx;
int stLen;
int oIdx;
int oLen;
int ouIdx;
int ouLen;
int emailIdx;
int emailLen;
int uidIdx;
int uidLen;
int serialIdx;
int serialLen;
};
typedef struct DecodedCert DecodedCert;
typedef struct DecodedName DecodedName;
typedef struct Signer Signer;
struct DecodedCert {
byte* publicKey;
word32 pubKeySize;
int pubKeyStored;
word32 certBegin; /* offset to start of cert */
word32 sigIndex; /* offset to start of signature */
word32 sigLength; /* length of signature */
word32 signatureOID; /* sum of algorithm object id */
word32 keyOID; /* sum of key algo object id */
int version; /* cert version, 1 or 3 */
DNS_entry* altNames; /* alt names list of dns entries */
byte subjectHash[SHA_SIZE]; /* hash of all Names */
byte issuerHash[SHA_SIZE]; /* hash of all Names */
#ifdef HAVE_OCSP
byte issuerKeyHash[SHA_SIZE]; /* hash of the public Key */
#endif /* HAVE_OCSP */
byte* signature; /* not owned, points into raw cert */
char* subjectCN; /* CommonName */
int subjectCNLen;
int subjectCNStored; /* have we saved a copy we own */
char issuer[ASN_NAME_MAX]; /* full name including common name */
char subject[ASN_NAME_MAX]; /* full name including common name */
int verify; /* Default to yes, but could be off */
byte* source; /* byte buffer holder cert, NOT owner */
word32 srcIdx; /* current offset into buffer */
word32 maxIdx; /* max offset based on init size */
void* heap; /* for user memory overrides */
byte serial[EXTERNAL_SERIAL_SIZE]; /* raw serial number */
int serialSz; /* raw serial bytes stored */
byte* extensions; /* not owned, points into raw cert */
int extensionsSz; /* length of cert extensions */
word32 extensionsIdx; /* if want to go back and parse later */
byte* extAuthInfo; /* Authority Information Access URI */
int extAuthInfoSz; /* length of the URI */
byte* extCrlInfo; /* CRL Distribution Points */
int extCrlInfoSz; /* length of the URI */
byte extSubjKeyId[SHA_SIZE]; /* Subject Key ID */
byte extSubjKeyIdSet; /* Set when the SKID was read from cert */
byte extAuthKeyId[SHA_SIZE]; /* Authority Key ID */
byte extAuthKeyIdSet; /* Set when the AKID was read from cert */
byte isCA; /* CA basic constraint true */
byte extKeyUsageSet;
word16 extKeyUsage; /* Key usage bitfield */
byte extExtKeyUsageSet; /* Extended Key Usage */
byte extExtKeyUsage; /* Extended Key usage bitfield */
#ifdef OPENSSL_EXTRA
byte extBasicConstSet;
byte extBasicConstCrit;
byte extBasicConstPlSet;
word32 pathLength; /* CA basic constraint path length, opt */
byte extSubjAltNameSet;
byte extSubjAltNameCrit;
byte extAuthKeyIdCrit;
byte extSubjKeyIdCrit;
byte extKeyUsageCrit;
byte extExtKeyUsageCrit;
byte* extExtKeyUsageSrc;
word32 extExtKeyUsageSz;
word32 extExtKeyUsageCount;
byte* extAuthKeyIdSrc;
word32 extAuthKeyIdSz;
byte* extSubjKeyIdSrc;
word32 extSubjKeyIdSz;
#endif
#ifdef HAVE_ECC
word32 pkCurveOID; /* Public Key's curve OID */
#endif /* HAVE_ECC */
byte* beforeDate;
int beforeDateLen;
byte* afterDate;
int afterDateLen;
#ifdef HAVE_PKCS7
byte* issuerRaw; /* pointer to issuer inside source */
int issuerRawLen;
#endif
#if defined(CYASSL_CERT_GEN)
/* easy access to subject info for other sign */
char* subjectSN;
int subjectSNLen;
char* subjectC;
int subjectCLen;
char* subjectL;
int subjectLLen;
char* subjectST;
int subjectSTLen;
char* subjectO;
int subjectOLen;
char* subjectOU;
int subjectOULen;
char* subjectEmail;
int subjectEmailLen;
#endif /* CYASSL_CERT_GEN */
#ifdef OPENSSL_EXTRA
DecodedName issuerName;
DecodedName subjectName;
#endif /* OPENSSL_EXTRA */
#ifdef CYASSL_SEP
int deviceTypeSz;
byte* deviceType;
int hwTypeSz;
byte* hwType;
int hwSerialNumSz;
byte* hwSerialNum;
#ifdef OPENSSL_EXTRA
byte extCertPolicySet;
byte extCertPolicyCrit;
#endif /* OPENSSL_EXTRA */
#endif /* CYASSL_SEP */
};
#ifdef SHA_DIGEST_SIZE
#define SIGNER_DIGEST_SIZE SHA_DIGEST_SIZE
#else
#define SIGNER_DIGEST_SIZE 20
#endif
/* CA Signers */
/* if change layout change PERSIST_CERT_CACHE functions too */
struct Signer {
word32 pubKeySize;
word32 keyOID; /* key type */
word16 keyUsage;
byte* publicKey;
int nameLen;
char* name; /* common name */
byte subjectNameHash[SIGNER_DIGEST_SIZE];
/* sha hash of names in certificate */
#ifndef NO_SKID
byte subjectKeyIdHash[SIGNER_DIGEST_SIZE];
/* sha hash of names in certificate */
#endif
Signer* next;
};
/* not for public consumption but may use for testing sometimes */
#ifdef CYASSL_TEST_CERT
#define CYASSL_TEST_API CYASSL_API
#else
#define CYASSL_TEST_API CYASSL_LOCAL
#endif
CYASSL_TEST_API void FreeAltNames(DNS_entry*, void*);
CYASSL_TEST_API void InitDecodedCert(DecodedCert*, byte*, word32, void*);
CYASSL_TEST_API void FreeDecodedCert(DecodedCert*);
CYASSL_TEST_API int ParseCert(DecodedCert*, int type, int verify, void* cm);
CYASSL_LOCAL int ParseCertRelative(DecodedCert*, int type, int verify,void* cm);
CYASSL_LOCAL int DecodeToKey(DecodedCert*, int verify);
CYASSL_LOCAL word32 EncodeSignature(byte* out, const byte* digest, word32 digSz,
int hashOID);
CYASSL_LOCAL Signer* MakeSigner(void*);
CYASSL_LOCAL void FreeSigner(Signer*, void*);
CYASSL_LOCAL void FreeSignerTable(Signer**, int, void*);
CYASSL_LOCAL int ToTraditional(byte* buffer, word32 length);
CYASSL_LOCAL int ToTraditionalEnc(byte* buffer, word32 length,const char*, int);
CYASSL_LOCAL int ValidateDate(const byte* date, byte format, int dateType);
/* ASN.1 helper functions */
CYASSL_LOCAL int GetLength(const byte* input, word32* inOutIdx, int* len,
word32 maxIdx);
CYASSL_LOCAL int GetSequence(const byte* input, word32* inOutIdx, int* len,
word32 maxIdx);
CYASSL_LOCAL int GetSet(const byte* input, word32* inOutIdx, int* len,
word32 maxIdx);
CYASSL_LOCAL int GetMyVersion(const byte* input, word32* inOutIdx,
int* version);
CYASSL_LOCAL int GetInt(mp_int* mpi, const byte* input, word32* inOutIdx,
word32 maxIdx);
CYASSL_LOCAL int GetAlgoId(const byte* input, word32* inOutIdx, word32* oid,
word32 maxIdx);
CYASSL_LOCAL word32 SetLength(word32 length, byte* output);
CYASSL_LOCAL word32 SetSequence(word32 len, byte* output);
CYASSL_LOCAL word32 SetOctetString(word32 len, byte* output);
CYASSL_LOCAL word32 SetImplicit(byte tag, byte number, word32 len,byte* output);
CYASSL_LOCAL word32 SetExplicit(byte number, word32 len, byte* output);
CYASSL_LOCAL word32 SetSet(word32 len, byte* output);
CYASSL_LOCAL word32 SetAlgoID(int algoOID, byte* output, int type, int curveSz);
CYASSL_LOCAL int SetMyVersion(word32 version, byte* output, int header);
CYASSL_LOCAL int SetSerialNumber(const byte* sn, word32 snSz, byte* output);
CYASSL_LOCAL int GetNameHash(const byte* source, word32* idx, byte* hash,
int maxIdx);
#ifdef HAVE_ECC
/* ASN sig helpers */
CYASSL_LOCAL int StoreECC_DSA_Sig(byte* out, word32* outLen, mp_int* r,
mp_int* s);
CYASSL_LOCAL int DecodeECC_DSA_Sig(const byte* sig, word32 sigLen,
mp_int* r, mp_int* s);
#endif
#ifdef CYASSL_CERT_GEN
enum cert_enums {
NAME_ENTRIES = 8,
JOINT_LEN = 2,
EMAIL_JOINT_LEN = 9,
RSA_KEY = 10,
NTRU_KEY = 11,
ECC_KEY = 12
};
#endif /* CYASSL_CERT_GEN */
/* for pointer use */
typedef struct CertStatus CertStatus;
#ifdef HAVE_OCSP
enum Ocsp_Response_Status {
OCSP_SUCCESSFUL = 0, /* Response has valid confirmations */
OCSP_MALFORMED_REQUEST = 1, /* Illegal confirmation request */
OCSP_INTERNAL_ERROR = 2, /* Internal error in issuer */
OCSP_TRY_LATER = 3, /* Try again later */
OCSP_SIG_REQUIRED = 5, /* Must sign the request (4 is skipped) */
OCSP_UNAUTHROIZED = 6 /* Request unauthorized */
};
enum Ocsp_Cert_Status {
CERT_GOOD = 0,
CERT_REVOKED = 1,
CERT_UNKNOWN = 2
};
enum Ocsp_Sums {
OCSP_BASIC_OID = 117,
OCSP_NONCE_OID = 118
};
typedef struct OcspRequest OcspRequest;
typedef struct OcspResponse OcspResponse;
struct CertStatus {
CertStatus* next;
byte serial[EXTERNAL_SERIAL_SIZE];
int serialSz;
int status;
byte thisDate[MAX_DATE_SIZE];
byte nextDate[MAX_DATE_SIZE];
byte thisDateFormat;
byte nextDateFormat;
};
struct OcspResponse {
int responseStatus; /* return code from Responder */
byte* response; /* Pointer to beginning of OCSP Response */
word32 responseSz; /* length of the OCSP Response */
byte producedDate[MAX_DATE_SIZE];
/* Date at which this response was signed */
byte producedDateFormat; /* format of the producedDate */
byte* issuerHash;
byte* issuerKeyHash;
byte* cert;
word32 certSz;
byte* sig; /* Pointer to sig in source */
word32 sigSz; /* Length in octets for the sig */
word32 sigOID; /* OID for hash used for sig */
CertStatus* status; /* certificate status to fill out */
byte* nonce; /* pointer to nonce inside ASN.1 response */
int nonceSz; /* length of the nonce string */
byte* source; /* pointer to source buffer, not owned */
word32 maxIdx; /* max offset based on init size */
};
struct OcspRequest {
DecodedCert* cert;
byte useNonce;
byte nonce[MAX_OCSP_NONCE_SZ];
int nonceSz;
byte* issuerHash; /* pointer to issuerHash in source cert */
byte* issuerKeyHash; /* pointer to issuerKeyHash in source cert */
byte* serial; /* pointer to serial number in source cert */
int serialSz; /* length of the serial number */
byte* dest; /* pointer to the destination ASN.1 buffer */
word32 destSz; /* length of the destination buffer */
};
CYASSL_LOCAL void InitOcspResponse(OcspResponse*, CertStatus*, byte*, word32);
CYASSL_LOCAL int OcspResponseDecode(OcspResponse*);
CYASSL_LOCAL void InitOcspRequest(OcspRequest*, DecodedCert*,
byte, byte*, word32);
CYASSL_LOCAL int EncodeOcspRequest(OcspRequest*);
CYASSL_LOCAL int CompareOcspReqResp(OcspRequest*, OcspResponse*);
#endif /* HAVE_OCSP */
/* for pointer use */
typedef struct RevokedCert RevokedCert;
#ifdef HAVE_CRL
struct RevokedCert {
byte serialNumber[EXTERNAL_SERIAL_SIZE];
int serialSz;
RevokedCert* next;
};
typedef struct DecodedCRL DecodedCRL;
struct DecodedCRL {
word32 certBegin; /* offset to start of cert */
word32 sigIndex; /* offset to start of signature */
word32 sigLength; /* length of signature */
word32 signatureOID; /* sum of algorithm object id */
byte* signature; /* pointer into raw source, not owned */
byte issuerHash[SHA_DIGEST_SIZE]; /* issuer hash */
byte crlHash[SHA_DIGEST_SIZE]; /* raw crl data hash */
byte lastDate[MAX_DATE_SIZE]; /* last date updated */
byte nextDate[MAX_DATE_SIZE]; /* next update date */
byte lastDateFormat; /* format of last date */
byte nextDateFormat; /* format of next date */
RevokedCert* certs; /* revoked cert list */
int totalCerts; /* number on list */
};
CYASSL_LOCAL void InitDecodedCRL(DecodedCRL*);
CYASSL_LOCAL int ParseCRL(DecodedCRL*, const byte* buff, word32 sz, void* cm);
CYASSL_LOCAL void FreeDecodedCRL(DecodedCRL*);
#endif /* HAVE_CRL */
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* CTAO_CRYPT_ASN_H */
#endif /* !NO_ASN */
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