diff options
author | Dr. Stephen Henson <steve@openssl.org> | 2016-02-01 00:02:05 +0000 |
---|---|---|
committer | Dr. Stephen Henson <steve@openssl.org> | 2016-02-02 17:17:38 +0000 |
commit | 85a4807f94580b9b666b3e24fff5752515470b1c (patch) | |
tree | e2e4f5242dcfe694575a1b003badc5b56e14f71e /doc/crypto/BN_bn2bin.pod | |
parent | 19f7130beb97170b8e825aee1ae9e309520f5f29 (diff) | |
download | openssl-85a4807f94580b9b666b3e24fff5752515470b1c.tar.gz |
New BN functions.
Add new function BN_bn2binpad() which checks the length of the output
buffer and pads the result with zeroes if necessary.
New functions BN_bn2lebinpad() and BN_lebin2bn() which use little endian
format.
Reviewed-by: Rich Salz <rsalz@openssl.org>
Diffstat (limited to 'doc/crypto/BN_bn2bin.pod')
-rw-r--r-- | doc/crypto/BN_bn2bin.pod | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/doc/crypto/BN_bn2bin.pod b/doc/crypto/BN_bn2bin.pod index dd1007d2ce..cbd5d340e1 100644 --- a/doc/crypto/BN_bn2bin.pod +++ b/doc/crypto/BN_bn2bin.pod @@ -2,16 +2,21 @@ =head1 NAME -BN_bn2bin, BN_bin2bn, BN_bn2hex, BN_bn2dec, BN_hex2bn, BN_dec2bn, -BN_print, BN_print_fp, BN_bn2mpi, BN_mpi2bn - format conversions +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 =head1 SYNOPSIS #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); @@ -29,10 +34,18 @@ BN_bn2bin() converts the absolute value of B<a> into big-endian form and stores it at B<to>. B<to> must point to BN_num_bytes(B<a>) bytes of memory. +BN_bn2binpad() also converts the absolute value of B<a> into big-endian form +and stores it at B<to>. B<tolen> indicates the length of the output buffer +B<to>. The result is padded with zeroes if necessary. If B<tolen> is less than +BN_num_bytes(B<a>) an error is returned. + BN_bin2bn() converts the positive integer in big-endian form of length B<len> at B<s> into a B<BIGNUM> and places it in B<ret>. If B<ret> is NULL, a new B<BIGNUM> is created. +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 B<a> respectively. For negative numbers, the string is prefaced with a leading '-'. The string must be @@ -67,6 +80,9 @@ if B<ret> is NULL. BN_bn2bin() returns the length of the big-endian number placed at B<to>. BN_bin2bn() returns the B<BIGNUM>, NULL on error. +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 NULL on error. BN_hex2bn() and BN_dec2bn() return the number's length in hexadecimal or decimal digits, and 0 on error. |