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