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NAMEBN_bn2binpad, BN_bn2bin, BN_bin2bn, BN_bn2lebinpad, BN_lebin2bn, BN_bn2hex, BN_bn2dec, BN_hex2bn, BN_dec2bn, BN_print, BN_print_fp, BN_bn2mpi, BN_mpi2bn - format conversions
#include <openssl/bn.h> int BN_bn2bin(const BIGNUM *a, unsigned char *to); int BN_bn2binpad(const BIGNUM *a, unsigned char *to, int tolen); BIGNUM *BN_bin2bn(const unsigned char *s, int len, BIGNUM *ret); int BN_bn2lebinpad(const BIGNUM *a, unsigned char *to, int tolen); BIGNUM *BN_lebin2bn(const unsigned char *s, int len, BIGNUM *ret); char *BN_bn2hex(const BIGNUM *a); char *BN_bn2dec(const BIGNUM *a); int BN_hex2bn(BIGNUM **a, const char *str); int BN_dec2bn(BIGNUM **a, const char *str); int BN_print(BIO *fp, const BIGNUM *a); int BN_print_fp(FILE *fp, const BIGNUM *a); int BN_bn2mpi(const BIGNUM *a, unsigned char *to); BIGNUM *BN_mpi2bn(unsigned char *s, int len, BIGNUM *ret);
DESCRIPTIONBN_bn2bin() converts the absolute value of a into big-endian form and stores it at to. to must point to BN_num_bytes(a) bytes of memory.
BN_bn2binpad() also converts the absolute value of a into big-endian form and stores it at to. tolen indicates the length of the output buffer to. The result is padded with zeroes if necessary. If tolen is less than BN_num_bytes(a) an error is returned.
BN_bin2bn() converts the positive integer in big-endian form of length len at s into a
BN_bn2lebinpad() and BN_bin2lbn() are identical to BN_bn2binpad() and BN_bin2bn() except the buffer is in little-endian format.
BN_bn2hex() and BN_bn2dec() return printable strings containing the hexadecimal and decimal encoding of a respectively. For negative numbers, the string is prefaced with a leading '-'. The string must be freed later using OPENSSL_free().
BN_hex2bn() takes as many characters as possible from the string str, including the leading character '-' which means negative, to form a valid hexadecimal number representation and converts them to a
BN_print() and BN_print_fp() write the hexadecimal encoding of a, with a leading '-' for negative numbers, to the
BN_bn2mpi() and BN_mpi2bn() convert
BN_bn2mpi() stores the representation of a at to, where to must be large enough to hold the result. The size can be determined by calling BN_bn2mpi(a,
BN_mpi2bn() converts the len bytes long representation at s to a
RETURN VALUESBN_bn2bin() returns the length of the big-endian number placed at to. BN_bin2bn() returns the
BN_bn2binpad() returns the number of bytes written or -1 if the supplied buffer is too small.
BN_bn2hex() and BN_bn2dec() return a null-terminated string, or
BN_print_fp() and BN_print() return 1 on success, 0 on write errors.
BN_bn2mpi() returns the length of the representation. BN_mpi2bn() returns the
The error codes can be obtained by ERR_get_error(3).
SEE ALSOERR_get_error(3), BN_zero(3), ASN1_INTEGER_to_BN(3), BN_num_bytes(3)
COPYRIGHTCopyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the ``License''). You may not use this file except in compliance with the License. You can obtain a copy in the file