BN_dec2bn man page on SmartOS

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BN_bn2bin(3)			    OpenSSL			  BN_bn2bin(3)

       BN_bn2bin, BN_bin2bn, 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);
	BIGNUM *BN_bin2bn(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);

       BN_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_bin2bn() converts the positive integer in big-endian form of length
       len at s into a BIGNUM and places it in ret. If ret is NULL, a new
       BIGNUM is created.

       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() converts the string str containing a hexadecimal number to
       a BIGNUM and stores it in **bn. If *bn is NULL, a new BIGNUM is
       created. If bn is NULL, it only computes the number's length in
       hexadecimal digits. If the string starts with '-', the number is
       negative. BN_dec2bn() is the same using the decimal system.

       BN_print() and BN_print_fp() write the hexadecimal encoding of a, with
       a leading '-' for negative numbers, to the BIO or FILE fp.

       BN_bn2mpi() and BN_mpi2bn() convert BIGNUMs from and to a format that
       consists of the number's length in bytes represented as a 4-byte big-
       endian number, and the number itself in big-endian format, where the
       most significant bit signals a negative number (the representation of
       numbers with the MSB set is prefixed with null byte).

       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, NULL).

       BN_mpi2bn() converts the len bytes long representation at s to a BIGNUM
       and stores it at ret, or in a newly allocated BIGNUM if ret is NULL.

       BN_bn2bin() returns the length of the big-endian number placed at to.
       BN_bin2bn() returns the BIGNUM, NULL on error.

       BN_bn2hex() and BN_bn2dec() return a null-terminated string, or NULL on
       error. BN_hex2bn() and BN_dec2bn() return the number's length in
       hexadecimal or decimal digits, and 0 on error.

       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 BIGNUM, and NULL on error.

       The error codes can be obtained by ERR_get_error(3).

       bn(3), ERR_get_error(3), BN_zero(3), ASN1_INTEGER_to_BN(3),

       BN_bn2bin(), BN_bin2bn(), BN_print_fp() and BN_print() are available in
       all versions of SSLeay and OpenSSL.

       BN_bn2hex(), BN_bn2dec(), BN_hex2bn(), BN_dec2bn(), BN_bn2mpi() and
       BN_mpi2bn() were added in SSLeay 0.9.0.

1.0.1g				  2014-03-17			  BN_bn2bin(3)

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