Sortix nightly manual
This manual documents Sortix nightly, a development build that has not been officially released. You can instead view this document in the latest official manual.
|BN_BN2BIN(3)||Library Functions Manual||BN_BN2BIN(3)|
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 **ap, const char *str); int
BN_dec2bn(BIGNUM **ap, const char *str); int
BN_asc2bn(BIGNUM **ap, 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_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 zeros 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 BIGNUM and places it in ret. If ret is
NULL, a new BIGNUM is created.
BN_lebin2bn() are identical to
BN_bin2bn() except the buffer *to is in little-endian format.
BN_bn2dec() return printable strings containing the hexadecimal and decimal encoding of a respectively. For negative numbers, the string is prefaced with a leading minus sign. The string must be freed later using free(3).
BN_hex2bn() interprets str as a hexadecimal number. The string may start with a minus sign (‘-’). Conversion stops at the first byte that is not a hexadecimal digit. The number is converted to a BIGNUM and stored in **ap. If *ap is
NULL, a new BIGNUM is created. If ap is
NULL, it only computes the number's length in hexadecimal digits, also counting the leading minus sign if there is one. A "negative zero" is converted to zero.
BN_dec2bn() is the same using the decimal system.
BN_asc2bn() infers the number base from an optional prefix. If str starts with “0x” or “0X”, it calls
BN_dec2bn(). If the number is negative, the minus sign can be given before or after the prefix.
BN_print_fp() write the hexadecimal encoding of a, with a leading minus sign for negative numbers, to the BIO or FILE fp.
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 a NUL 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_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
BN_bn2bin() returns the length of the big-endian number placed at to.
BN_bn2lebinpad() return the number of bytes written or -1 if the supplied buffer is too small.
BN_lebin2bn() return the BIGNUM, or
BN_bn2dec() return a NUL-terminated string, or
BN_dec2bn() return the number's length in hexadecimal or decimal digits, also counting the leading minus sign if there is one, or 0 on error, in which case no new BIGNUM is created.
BN_asc2bn() returns 1 on success or 0 on error, in which case no new BIGNUM is created.
BN_print() return 1 on success, 0 on write errors.
BN_bn2mpi() returns the length of the representation.
BN_mpi2bn() returns the BIGNUM, or
NULLon error. The error codes can be obtained by ERR_get_error(3). ASN1_bn_print(3), ASN1_INTEGER_to_BN(3), BN_new(3), BN_num_bytes(3), BN_zero(3)
BN_print() first appeared in SSLeay 0.5.1.
BN_print_fp() first appeared in SSLeay 0.6.0.
BN_mpi2bn() first appeared in SSLeay 0.9.0. All these functions have been available since OpenBSD 2.4.
BN_asc2bin() first appeared in OpenSSL 1.0.0 and has been available since OpenBSD 4.9.
BN_lebin2bn() first appeared in OpenSSL 1.1.0 and have been available since OpenBSD 7.0.
|December 8, 2021||Debian|