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Update the documentation of BN_hex2bn()

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Reviewed-by: Kurt Roeckx <kurt@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
This commit is contained in:
huangqinjin 2016-05-18 18:07:10 +08:00 committed by Matt Caswell
parent 58c03e3b92
commit 5e0dc5c999
1 changed files with 9 additions and 7 deletions
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16
doc/crypto/BN_bn2bin.pod
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@ -51,11 +51,12 @@ hexadecimal and decimal encoding of B<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 B<str> containing a hexadecimal number
to a B<BIGNUM> and stores it in **B<bn>. If *B<bn> is NULL, a new
B<BIGNUM> is created. If B<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_hex2bn()takes as many characters as possible from the string B<str>,
including the leading character '-' which means negative, to form a valid
hexadecimal number representation and converts them to a B<BIGNUM> and
stores it in **B<bn>. If *B<bn> is NULL, a new B<BIGNUM> is created. If
B<bn> is NULL, it only computes the length of valid representation.
BN_dec2bn() is the same using the decimal system.
BN_print() and BN_print_fp() write the hexadecimal encoding of B<a>,
with a leading '-' for negative numbers, to the B<BIO> or B<FILE>
@ -84,8 +85,9 @@ 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.
on error. BN_hex2bn() and BN_dec2bn() return the the length of valid
representation in hexadecimal or decimal digits, and 0 on error, in which
case no new B<BIGNUM> will be created.
BN_print_fp() and BN_print() return 1 on success, 0 on write errors.