diff options
Diffstat (limited to 'mpi.h')
| -rw-r--r-- | mpi.h | 20 |
1 files changed, 19 insertions, 1 deletions
@@ -37,6 +37,11 @@ #include <gcrypt.h> +/** + * This class is a wrapper for the libgcrypt multi precision integer library. + * + */ + class Mpi { public: @@ -52,10 +57,23 @@ public: Mpi operator^(const Mpi &b) const; Mpi operator*(const unsigned long int n) const; + /** + * shift the bits to the right + * (LSB on the right side) + * @param n number of bits to shift + */ void rShift(u_int8_t n); // LSB on the right side! Mpi mul2exp(u_int32_t e) const; // value * 2^e void clearHighBit(u_int32_t n); - u_int8_t *getBuf(u_int32_t buf_len) const; + + /** + * returns a new[] u_int8_t* buffer with the MPI value in the + * GCRYMPI_FMT_STD (2-complement stored without a length header). + * you have to delete it by hand with delete[]! + * @param buf_len size of the new buffer that is returned + * @return a byte buffer of size buf_len + */ + u_int8_t *getNewBuf(u_int32_t buf_len) const; u_int32_t getLen() const; protected: |