Mercurial > dropbear
view libtomcrypt/src/encauth/chachapoly/chacha20poly1305_memory.c @ 1653:76189c9ffea2
External Public-Key Authentication API (#72)
* Implemented dynamic loading of an external plug-in shared library to delegate public key authentication
* Moved conditional compilation of the plugin infrastructure into the configure.ac script to be able to add -ldl to dropbear build only when the flag is enabled
* Added tags file to the ignore list
* Updated API to have the constructor to return function pointers in the pliugin instance. Added support for passing user name to the checkpubkey function. Added options to the session returned by the plugin and have dropbear to parse and process them
* Added -rdynamic to the linker flags when EPKA is enabled
* Changed the API to pass a previously created session to the checkPubKey function (created during preauth)
* Added documentation to the API
* Added parameter addrstring to plugin creation function
* Modified the API to retrieve the auth options. Instead of having them as field of the EPKASession struct, they are stored internally (plugin-dependent) in the plugin/session and retrieved through a pointer to a function (in the session)
* Changed option string to be a simple char * instead of unsigned char *
author | fabriziobertocci <fabriziobertocci@gmail.com> |
---|---|
date | Wed, 15 May 2019 09:43:57 -0400 |
parents | 6dba84798cd5 |
children |
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/* 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. */ #include "tomcrypt.h" #ifdef LTC_CHACHA20POLY1305_MODE /** Process an entire GCM packet in one call. @param key The secret key @param keylen The length of the secret key @param iv The initialization vector @param ivlen The length of the initialization vector @param aad The additional authentication data (header) @param aadlen The length of the aad @param in The plaintext @param inlen The length of the plaintext (ciphertext length is the same) @param out The ciphertext @param tag [out] The MAC tag @param taglen [in/out] The MAC tag length @param direction Encrypt or Decrypt mode (CHACHA20POLY1305_ENCRYPT or CHACHA20POLY1305_DECRYPT) @return CRYPT_OK on success */ int chacha20poly1305_memory(const unsigned char *key, unsigned long keylen, const unsigned char *iv, unsigned long ivlen, const unsigned char *aad, unsigned long aadlen, const unsigned char *in, unsigned long inlen, unsigned char *out, unsigned char *tag, unsigned long *taglen, int direction) { chacha20poly1305_state st; int err; LTC_ARGCHK(key != NULL); LTC_ARGCHK(iv != NULL); LTC_ARGCHK(in != NULL); LTC_ARGCHK(out != NULL); LTC_ARGCHK(tag != NULL); if ((err = chacha20poly1305_init(&st, key, keylen)) != CRYPT_OK) { goto LBL_ERR; } if ((err = chacha20poly1305_setiv(&st, iv, ivlen)) != CRYPT_OK) { goto LBL_ERR; } if (aad && aadlen > 0) { if ((err = chacha20poly1305_add_aad(&st, aad, aadlen)) != CRYPT_OK) { goto LBL_ERR; } } if (direction == CHACHA20POLY1305_ENCRYPT) { if ((err = chacha20poly1305_encrypt(&st, in, inlen, out)) != CRYPT_OK) { goto LBL_ERR; } } else if (direction == CHACHA20POLY1305_DECRYPT) { if ((err = chacha20poly1305_decrypt(&st, in, inlen, out)) != CRYPT_OK) { goto LBL_ERR; } } else { err = CRYPT_INVALID_ARG; goto LBL_ERR; } err = chacha20poly1305_done(&st, tag, taglen); LBL_ERR: #ifdef LTC_CLEAN_STACK zeromem(&st, sizeof(chacha20poly1305_state)); #endif return err; } #endif /* ref: $Format:%D$ */ /* git commit: $Format:%H$ */ /* commit time: $Format:%ai$ */