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-rw-r--r--crypto/openssl/doc/crypto/BN_bn2bin.pod4
1 files changed, 3 insertions, 1 deletions
diff --git a/crypto/openssl/doc/crypto/BN_bn2bin.pod b/crypto/openssl/doc/crypto/BN_bn2bin.pod
index a4b17ca..3bed47f 100644
--- a/crypto/openssl/doc/crypto/BN_bn2bin.pod
+++ b/crypto/openssl/doc/crypto/BN_bn2bin.pod
@@ -42,7 +42,9 @@ 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.
+number is negative.
+A "negative zero" is converted to zero.
+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>
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