[Opentnl-cvs] tnl/libtomcrypt/modes/cfb cfb_decrypt.c,NONE,1.1 cfb_done.c,NONE,1.1 cfb_encrypt.c,NON
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From: Mark F. <mar...@us...> - 2005-04-28 17:28:12
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Update of /cvsroot/opentnl/tnl/libtomcrypt/modes/cfb In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv26694/libtomcrypt/modes/cfb Added Files: cfb_decrypt.c cfb_done.c cfb_encrypt.c cfb_getiv.c cfb_setiv.c cfb_start.c Log Message: Updated to libtomcrypt 1.0.2 Not tested on linux or OS X --- NEW FILE: cfb_start.c --- /* LibTomCrypt, modular cryptographic library -- Tom St Denis * * LibTomCrypt is a library that provides various cryptographic * algorithms in a highly modular and flexible manner. * * The library is free for all purposes without any express * guarantee it works. * * Tom St Denis, tom...@gm..., http://libtomcrypt.org */ #include "tomcrypt.h" /** @file cfb_start.c CFB implementation, start chain, Tom St Denis */ #ifdef CFB /** Initialize a CFB context @param cipher The index of the cipher desired @param IV The initial vector @param key The secret key @param keylen The length of the secret key (octets) @param num_rounds Number of rounds in the cipher desired (0 for default) @param cfb The CFB state to initialize @return CRYPT_OK if successful */ int cfb_start(int cipher, const unsigned char *IV, const unsigned char *key, int keylen, int num_rounds, symmetric_CFB *cfb) { int x, err; LTC_ARGCHK(IV != NULL); LTC_ARGCHK(key != NULL); LTC_ARGCHK(cfb != NULL); if ((err = cipher_is_valid(cipher)) != CRYPT_OK) { return err; } /* copy data */ cfb->cipher = cipher; cfb->blocklen = cipher_descriptor[cipher].block_length; for (x = 0; x < cfb->blocklen; x++) cfb->IV[x] = IV[x]; /* init the cipher */ if ((err = cipher_descriptor[cipher].setup(key, keylen, num_rounds, &cfb->key)) != CRYPT_OK) { return err; } /* encrypt the IV */ cipher_descriptor[cfb->cipher].ecb_encrypt(cfb->IV, cfb->IV, &cfb->key); cfb->padlen = 0; return CRYPT_OK; } #endif --- NEW FILE: cfb_done.c --- /* LibTomCrypt, modular cryptographic library -- Tom St Denis * * LibTomCrypt is a library that provides various cryptographic * algorithms in a highly modular and flexible manner. * * The library is free for all purposes without any express * guarantee it works. * * Tom St Denis, tom...@gm..., http://libtomcrypt.org */ #include "tomcrypt.h" /** @file cfb_done.c CFB implementation, finish chain, Tom St Denis */ #ifdef CFB /** Terminate the chain @param cfb The CFB chain to terminate @return CRYPT_OK on success */ int cfb_done(symmetric_CFB *cfb) { int err; LTC_ARGCHK(cfb != NULL); if ((err = cipher_is_valid(cfb->cipher)) != CRYPT_OK) { return err; } cipher_descriptor[cfb->cipher].done(&cfb->key); return CRYPT_OK; } #endif --- NEW FILE: cfb_decrypt.c --- /* LibTomCrypt, modular cryptographic library -- Tom St Denis * * LibTomCrypt is a library that provides various cryptographic * algorithms in a highly modular and flexible manner. * * The library is free for all purposes without any express * guarantee it works. * * Tom St Denis, tom...@gm..., http://libtomcrypt.org */ #include "tomcrypt.h" /** @file cfb_decrypt.c CFB implementation, decrypt data, Tom St Denis */ #ifdef CFB /** CFB decrypt @param ct Ciphertext @param pt [out] Plaintext @param len Length of ciphertext (octets) @param cfb CFB state @return CRYPT_OK if successful */ int cfb_decrypt(const unsigned char *ct, unsigned char *pt, unsigned long len, symmetric_CFB *cfb) { int err; LTC_ARGCHK(pt != NULL); LTC_ARGCHK(ct != NULL); LTC_ARGCHK(cfb != NULL); if ((err = cipher_is_valid(cfb->cipher)) != CRYPT_OK) { return err; } /* is blocklen/padlen valid? */ if (cfb->blocklen < 0 || cfb->blocklen > (int)sizeof(cfb->IV) || cfb->padlen < 0 || cfb->padlen > (int)sizeof(cfb->pad)) { return CRYPT_INVALID_ARG; } while (len-- > 0) { if (cfb->padlen == cfb->blocklen) { cipher_descriptor[cfb->cipher].ecb_encrypt(cfb->pad, cfb->IV, &cfb->key); cfb->padlen = 0; } cfb->pad[cfb->padlen] = *ct; *pt = *ct ^ cfb->IV[cfb->padlen]; ++pt; ++ct; ++cfb->padlen; } return CRYPT_OK; } #endif --- NEW FILE: cfb_getiv.c --- /* LibTomCrypt, modular cryptographic library -- Tom St Denis * * LibTomCrypt is a library that provides various cryptographic * algorithms in a highly modular and flexible manner. * * The library is free for all purposes without any express * guarantee it works. * * Tom St Denis, tom...@gm..., http://libtomcrypt.org */ #include "tomcrypt.h" /** @file cfb_getiv.c CFB implementation, get IV, Tom St Denis */ #ifdef CFB /** Get the current initial vector @param IV [out] The destination of the initial vector @param len [in/out] The max size and resulting size of the initial vector @param cfb The CFB state @return CRYPT_OK if successful */ int cfb_getiv(unsigned char *IV, unsigned long *len, symmetric_CFB *cfb) { LTC_ARGCHK(IV != NULL); LTC_ARGCHK(len != NULL); LTC_ARGCHK(cfb != NULL); if ((unsigned long)cfb->blocklen > *len) { return CRYPT_BUFFER_OVERFLOW; } XMEMCPY(IV, cfb->IV, cfb->blocklen); *len = cfb->blocklen; return CRYPT_OK; } #endif --- NEW FILE: cfb_setiv.c --- /* LibTomCrypt, modular cryptographic library -- Tom St Denis * * LibTomCrypt is a library that provides various cryptographic * algorithms in a highly modular and flexible manner. * * The library is free for all purposes without any express * guarantee it works. * * Tom St Denis, tom...@gm..., http://libtomcrypt.org */ #include "tomcrypt.h" /** @file cfb_setiv.c CFB implementation, set IV, Tom St Denis */ #ifdef CFB /** Set an initial vector @param IV The initial vector @param len The length of the vector (in octets) @param cfb The CFB state @return CRYPT_OK if successful */ int cfb_setiv(const unsigned char *IV, unsigned long len, symmetric_CFB *cfb) { int err; LTC_ARGCHK(IV != NULL); LTC_ARGCHK(cfb != NULL); if ((err = cipher_is_valid(cfb->cipher)) != CRYPT_OK) { return err; } if (len != (unsigned long)cfb->blocklen) { return CRYPT_INVALID_ARG; } /* force next block */ cfb->padlen = 0; cipher_descriptor[cfb->cipher].ecb_encrypt(IV, cfb->IV, &cfb->key); return CRYPT_OK; } #endif --- NEW FILE: cfb_encrypt.c --- /* LibTomCrypt, modular cryptographic library -- Tom St Denis * * LibTomCrypt is a library that provides various cryptographic * algorithms in a highly modular and flexible manner. * * The library is free for all purposes without any express * guarantee it works. * * Tom St Denis, tom...@gm..., http://libtomcrypt.org */ #include "tomcrypt.h" /** @file cfb_encrypt.c CFB implementation, encrypt data, Tom St Denis */ #ifdef CFB /** CFB encrypt @param pt Plaintext @param ct [out] Ciphertext @param len Length of plaintext (octets) @param cfb CFB state @return CRYPT_OK if successful */ int cfb_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long len, symmetric_CFB *cfb) { int err; LTC_ARGCHK(pt != NULL); LTC_ARGCHK(ct != NULL); LTC_ARGCHK(cfb != NULL); if ((err = cipher_is_valid(cfb->cipher)) != CRYPT_OK) { return err; } /* is blocklen/padlen valid? */ if (cfb->blocklen < 0 || cfb->blocklen > (int)sizeof(cfb->IV) || cfb->padlen < 0 || cfb->padlen > (int)sizeof(cfb->pad)) { return CRYPT_INVALID_ARG; } while (len-- > 0) { if (cfb->padlen == cfb->blocklen) { cipher_descriptor[cfb->cipher].ecb_encrypt(cfb->pad, cfb->IV, &cfb->key); cfb->padlen = 0; } cfb->pad[cfb->padlen] = (*ct = *pt ^ cfb->IV[cfb->padlen]); ++pt; ++ct; ++cfb->padlen; } return CRYPT_OK; } #endif |