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added encryption routine for FT

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This commit is contained in:
mr-alice 2016-10-19 21:30:37 +02:00
parent 997154f9c5
commit 3ad0a81d8f
5 changed files with 144 additions and 13 deletions
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30
libretroshare/src/crypto/chacha20.cpp
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@ -307,18 +307,18 @@ static void print(const chacha20_state& s)
static void add(chacha20_state& s,const chacha20_state& t) { for(uint32_t i=0;i<16;++i) s.c[i] += t.c[i] ; }
static uint8_t read16bits(char s)
{
if(s >= '0' && s <= '9')
return s - '0' ;
else if(s >= 'a' && s <= 'f')
return s - 'a' + 10 ;
else if(s >= 'A' && s <= 'F')
return s - 'A' + 10 ;
else
throw std::runtime_error("Not an hex string!") ;
}
// static uint8_t read16bits(char s)
// {
// if(s >= '0' && s <= '9')
// return s - '0' ;
// else if(s >= 'a' && s <= 'f')
// return s - 'a' + 10 ;
// else if(s >= 'A' && s <= 'F')
// return s - 'A' + 10 ;
// else
// throw std::runtime_error("Not an hex string!") ;
// }
//
// static uint256_32 create_256bit_int(const std::string& s)
// {
// uint256_32 r(0,0,0,0,0,0,0,0) ;
@ -431,6 +431,12 @@ void poly1305_tag(uint8_t key[32],uint8_t *message,uint32_t size,uint8_t tag[16]
tag[12] = (acc.b[3] >> 0) & 0xff ; tag[13] = (acc.b[3] >> 8) & 0xff ; tag[14] = (acc.b[3] >>16) & 0xff ; tag[15] = (acc.b[3] >>24) & 0xff ;
}
void AEAD_chacha20_poly1305(uint8_t key[32], uint8_t nonce[12],uint8_t *data,uint32_t data_size,uint8_t *aad,uint32_t aad_size,uint8_t tag[16])
{
#warning this part is not implemented yet.
memset(tag,0xff,16) ;
}
void perform_tests()
{
std::cerr << "Testing Chacha20" << std::endl;

13
libretroshare/src/crypto/chacha20.h
View file

@ -62,7 +62,18 @@ namespace librs
* \param size size of the data
* \param tag generated poly1305 tag.
*/
static void AEAD_chacha20_poly1305(uint8_t key[32], uint8_t nonce[12],uint8_t *data,uint32_t data_size,uint8_t *aad,uint8_t *aad_size,uint8_t tag[16]) ;
static void AEAD_chacha20_poly1305(uint8_t key[32], uint8_t nonce[12],uint8_t *data,uint32_t data_size,uint8_t *aad,uint32_t aad_size,uint8_t tag[16]) ;
/*!
* \brief constant_time_memcmp
* Provides a constant time comparison of two memory chunks. The implementation comes from the FreeBSD implementation.
*
* \param m1 memory block 1
* \param m2 memory block 2
* \param size common size of m1 and m2
* \return
*/
static bool constant_time_memcmp(const uint8_t *m1,const uint8_t *m2,uint32_t size) ;
/*!
* \brief perform_tests