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#ifndef _MPINT
typedef struct mpint mpint;
#endif
/////////////////////////////////////////////////////////
// AES definitions
/////////////////////////////////////////////////////////
enum
{
AESbsize= 16,
AESmaxkey= 32,
AESmaxrounds= 14
};
typedef struct AESstate AESstate;
struct AESstate
{
ulong setup;
int rounds;
int keybytes;
uchar key[AESmaxkey]; /* unexpanded key */
u32int ekey[4*(AESmaxrounds + 1)]; /* encryption key */
u32int dkey[4*(AESmaxrounds + 1)]; /* decryption key */
uchar ivec[AESbsize]; /* initialization vector */
};
void setupAESstate(AESstate *s, uchar key[], int keybytes, uchar *ivec);
void aesCBCencrypt(uchar *p, int len, AESstate *s);
void aesCBCdecrypt(uchar *p, int len, AESstate *s);
/////////////////////////////////////////////////////////
// Blowfish Definitions
/////////////////////////////////////////////////////////
enum
{
BFbsize = 8,
BFrounds = 16
};
// 16-round Blowfish
typedef struct BFstate BFstate;
struct BFstate
{
ulong setup;
uchar key[56];
uchar ivec[8];
u32int pbox[BFrounds+2];
u32int sbox[1024];
};
void setupBFstate(BFstate *s, uchar key[], int keybytes, uchar *ivec);
void bfCBCencrypt(uchar*, int, BFstate*);
void bfCBCdecrypt(uchar*, int, BFstate*);
void bfECBencrypt(uchar*, int, BFstate*);
void bfECBdecrypt(uchar*, int, BFstate*);
/////////////////////////////////////////////////////////
// DES definitions
/////////////////////////////////////////////////////////
enum
{
DESbsize= 8
};
// single des
typedef struct DESstate DESstate;
struct DESstate
{
ulong setup;
uchar key[8]; /* unexpanded key */
ulong expanded[32]; /* expanded key */
uchar ivec[8]; /* initialization vector */
};
void setupDESstate(DESstate *s, uchar key[8], uchar *ivec);
void des_key_setup(uchar[8], ulong[32]);
void block_cipher(ulong*, uchar*, int);
void desCBCencrypt(uchar*, int, DESstate*);
void desCBCdecrypt(uchar*, int, DESstate*);
void desECBencrypt(uchar*, int, DESstate*);
void desECBdecrypt(uchar*, int, DESstate*);
// for backward compatibility with 7 byte DES key format
void des56to64(uchar *k56, uchar *k64);
void des64to56(uchar *k64, uchar *k56);
void key_setup(uchar[7], ulong[32]);
// triple des encrypt/decrypt orderings
enum {
DES3E= 0,
DES3D= 1,
DES3EEE= 0,
DES3EDE= 2,
DES3DED= 5,
DES3DDD= 7
};
typedef struct DES3state DES3state;
struct DES3state
{
ulong setup;
uchar key[3][8]; /* unexpanded key */
ulong expanded[3][32]; /* expanded key */
uchar ivec[8]; /* initialization vector */
};
void setupDES3state(DES3state *s, uchar key[3][8], uchar *ivec);
void triple_block_cipher(ulong keys[3][32], uchar*, int);
void des3CBCencrypt(uchar*, int, DES3state*);
void des3CBCdecrypt(uchar*, int, DES3state*);
void des3ECBencrypt(uchar*, int, DES3state*);
void des3ECBdecrypt(uchar*, int, DES3state*);
/////////////////////////////////////////////////////////
// digests
/////////////////////////////////////////////////////////
enum
{
SHA1dlen= 20, /* SHA digest length */
MD4dlen= 16, /* MD4 digest length */
MD5dlen= 16 /* MD5 digest length */
};
typedef struct DigestState DigestState;
struct DigestState
{
ulong len;
u32int state[5];
uchar buf[128];
int blen;
char malloced;
char seeded;
};
typedef struct DigestState SHAstate; /* obsolete name */
typedef struct DigestState SHA1state;
typedef struct DigestState MD5state;
typedef struct DigestState MD4state;
DigestState* md4(uchar*, ulong, uchar*, DigestState*);
DigestState* md5(uchar*, ulong, uchar*, DigestState*);
DigestState* sha1(uchar*, ulong, uchar*, DigestState*);
DigestState* hmac_md5(uchar*, ulong, uchar*, ulong, uchar*, DigestState*);
DigestState* hmac_sha1(uchar*, ulong, uchar*, ulong, uchar*, DigestState*);
char* sha1pickle(SHA1state*);
SHA1state* sha1unpickle(char*);
/////////////////////////////////////////////////////////
// random number generation
/////////////////////////////////////////////////////////
void genrandom(uchar *buf, int nbytes);
void prng(uchar *buf, int nbytes);
ulong fastrand(void);
ulong nfastrand(ulong);
/////////////////////////////////////////////////////////
// primes
/////////////////////////////////////////////////////////
void genprime(mpint *p, int n, int accuracy); // generate an n bit probable prime
void gensafeprime(mpint *p, mpint *alpha, int n, int accuracy); // prime and generator
void genstrongprime(mpint *p, int n, int accuracy); // generate an n bit strong prime
void DSAprimes(mpint *q, mpint *p, uchar seed[SHA1dlen]);
int probably_prime(mpint *n, int nrep); // miller-rabin test
int smallprimetest(mpint *p); // returns -1 if not prime, 0 otherwise
/////////////////////////////////////////////////////////
// rc4
/////////////////////////////////////////////////////////
typedef struct RC4state RC4state;
struct RC4state
{
uchar state[256];
uchar x;
uchar y;
};
void setupRC4state(RC4state*, uchar*, int);
void rc4(RC4state*, uchar*, int);
void rc4skip(RC4state*, int);
void rc4back(RC4state*, int);
/////////////////////////////////////////////////////////
// rsa
/////////////////////////////////////////////////////////
typedef struct RSApub RSApub;
typedef struct RSApriv RSApriv;
// public/encryption key
struct RSApub
{
mpint *n; // modulus
mpint *ek; // exp (encryption key)
};
// private/decryption key
struct RSApriv
{
RSApub pub;
mpint *dk; // exp (decryption key)
// precomputed values to help with chinese remainder theorem calc
mpint *p;
mpint *q;
mpint *kp; // dk mod p-1
mpint *kq; // dk mod q-1
mpint *c2; // (inv p) mod q
};
RSApriv* rsagen(int nlen, int elen, int rounds);
RSApriv* rsafill(mpint *n, mpint *e, mpint *d, mpint *p, mpint *q);
mpint* rsaencrypt(RSApub *k, mpint *in, mpint *out);
mpint* rsadecrypt(RSApriv *k, mpint *in, mpint *out);
RSApub* rsapuballoc(void);
void rsapubfree(RSApub*);
RSApriv* rsaprivalloc(void);
void rsaprivfree(RSApriv*);
RSApub* rsaprivtopub(RSApriv*);
RSApub* X509toRSApub(uchar*, int, char*, int);
RSApriv* asn1toRSApriv(uchar*, int);
void asn1dump(uchar *der, int len);
uchar* decodepem(char *s, char *type, int *len);
uchar* X509gen(RSApriv *priv, char *subj, ulong valid[2], int *certlen);
uchar* X509req(RSApriv *priv, char *subj, int *certlen);
char* X509verify(uchar *cert, int ncert, RSApub *pk);
void X509dump(uchar *cert, int ncert);
/////////////////////////////////////////////////////////
// elgamal
/////////////////////////////////////////////////////////
typedef struct EGpub EGpub;
typedef struct EGpriv EGpriv;
typedef struct EGsig EGsig;
// public/encryption key
struct EGpub
{
mpint *p; // modulus
mpint *alpha; // generator
mpint *key; // (encryption key) alpha**secret mod p
};
// private/decryption key
struct EGpriv
{
EGpub pub;
mpint *secret; // (decryption key)
};
// signature
struct EGsig
{
mpint *r, *s;
};
EGpriv* eggen(int nlen, int rounds);
mpint* egencrypt(EGpub *k, mpint *in, mpint *out);
mpint* egdecrypt(EGpriv *k, mpint *in, mpint *out);
EGsig* egsign(EGpriv *k, mpint *m);
int egverify(EGpub *k, EGsig *sig, mpint *m);
EGpub* egpuballoc(void);
void egpubfree(EGpub*);
EGpriv* egprivalloc(void);
void egprivfree(EGpriv*);
EGsig* egsigalloc(void);
void egsigfree(EGsig*);
EGpub* egprivtopub(EGpriv*);
/////////////////////////////////////////////////////////
// dsa
/////////////////////////////////////////////////////////
typedef struct DSApub DSApub;
typedef struct DSApriv DSApriv;
typedef struct DSAsig DSAsig;
// public/encryption key
struct DSApub
{
mpint *p; // modulus
mpint *q; // group order, q divides p-1
mpint *alpha; // group generator
mpint *key; // (encryption key) alpha**secret mod p
};
// private/decryption key
struct DSApriv
{
DSApub pub;
mpint *secret; // (decryption key)
};
// signature
struct DSAsig
{
mpint *r, *s;
};
DSApriv* dsagen(DSApub *opub);
DSAsig* dsasign(DSApriv *k, mpint *m);
int dsaverify(DSApub *k, DSAsig *sig, mpint *m);
DSApub* dsapuballoc(void);
void dsapubfree(DSApub*);
DSApriv* dsaprivalloc(void);
void dsaprivfree(DSApriv*);
DSAsig* dsasigalloc(void);
void dsasigfree(DSAsig*);
DSApub* dsaprivtopub(DSApriv*);
/////////////////////////////////////////////////////////
// TLS
/////////////////////////////////////////////////////////
typedef struct Thumbprint{
struct Thumbprint *next;
uchar sha1[SHA1dlen];
} Thumbprint;
typedef struct TLSconn{
char dir[40]; // connection directory
uchar *cert; // certificate (local on input, remote on output)
uchar *sessionID;
int certlen, sessionIDlen;
int (*trace)(char*fmt, ...);
} TLSconn;
// tlshand.c
extern int tlsClient(int fd, TLSconn *c);
extern int tlsServer(int fd, TLSconn *c);
// thumb.c
extern Thumbprint* initThumbprints(char *ok, char *crl);
extern void freeThumbprints(Thumbprint *ok);
extern int okThumbprint(uchar *sha1, Thumbprint *ok);
// readcert.c
extern uchar *readcert(char *filename, int *pcertlen);