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diff --git a/src/lib/libcrypto/man/BN_zero.3 b/src/lib/libcrypto/man/BN_zero.3
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+++ b/src/lib/libcrypto/man/BN_zero.3
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+.Dd $Mdocdate: February 23 2015 $
+.Dt BN_ZERO 3
+.Os
+.Sh NAME
+.Nm BN_zero ,
+.Nm BN_one ,
+.Nm BN_value_one ,
+.Nm BN_set_word ,
+.Nm BN_get_word
+.Nd BIGNUM assignment operations
+.Sh SYNOPSIS
+.In openssl/bn.h
+.Ft int
+.Fo BN_zero
+.Fa "BIGNUM *a"
+.Fc
+.Ft int
+.Fo BN_one
+.Fa "BIGNUM *a"
+.Fc
+.Ft const BIGNUM *
+.Fo BN_value_one
+.Fa void
+.Fc
+.Ft int
+.Fo BN_set_word
+.Fa "BIGNUM *a"
+.Fa "unsigned long w"
+.Fc
+.Ft unsigned long
+.Fo BN_get_word
+.Fa "BIGNUM *a"
+.Fc
+.Sh DESCRIPTION
+.Fn BN_zero ,
+.Fn BN_one ,
+and
+.Fn BN_set_word
+set
+.Fa a
+to the values 0, 1 and
+.Fa w
+respectively.
+.Fn BN_zero
+and
+.Fn BN_one
+are macros.
+.Pp
+.Fn BN_value_one
+returns a
+.Vt BIGNUM
+constant of value 1.
+This constant is useful for use in comparisons and assignment.
+.Pp
+.Fn BN_get_word
+returns
+.Fa a
+if it can be represented as an
+.Vt unsigned long .
+.Sh RETURN VALUES
+.Fn BN_get_word
+returns the value
+.Fa a ,
+or 0xffffffffL if
+.Fa a
+cannot be represented as an
+.Vt unsigned long .
+.Pp
+.Fn BN_zero ,
+.Fn BN_one ,
+and
+.Fn BN_set_word
+return 1 on success, 0 otherwise.
+.Fn BN_value_one
+returns the constant.
+.Sh SEE ALSO
+.Xr bn 3 ,
+.Xr BN_bn2bin 3
+.Sh HISTORY
+.Fn BN_zero ,
+.Fn BN_one ,
+and
+.Fn BN_set_word
+are available in all versions of SSLeay and OpenSSL.
+.Fn BN_value_one
+and
+.Fn BN_get_word
+were added in SSLeay 0.8.
+.Pp
+.Fn BN_value_one
+was changed to return a true
+.Vt const BIGNUM *
+in OpenSSL 0.9.7.
+.Sh BUGS
+Someone might change the constant.
+.Pp
+If a
+.Vt BIGNUM
+is equal to 0xffffffffL it can be represented as an
+.Vt unsigned long
+but this value is also returned on error.

diff --git a/src/lib/libcrypto/man/BN_zero.3 b/src/lib/libcrypto/man/BN_zero.3 new file mode 100644 index 0000000000..adfd6a0c65 --- /dev/null +++ b/src/lib/libcrypto/man/BN_zero.3
@@ -0,0 +1,101 @@
	1	.Dd $Mdocdate: February 23 2015 $
	2	.Dt BN_ZERO 3
	3	.Os
	4	.Sh NAME
	5	.Nm BN_zero ,
	6	.Nm BN_one ,
	7	.Nm BN_value_one ,
	8	.Nm BN_set_word ,
	9	.Nm BN_get_word
	10	.Nd BIGNUM assignment operations
	11	.Sh SYNOPSIS
	12	.In openssl/bn.h
	13	.Ft int
	14	.Fo BN_zero
	15	.Fa "BIGNUM *a"
	16	.Fc
	17	.Ft int
	18	.Fo BN_one
	19	.Fa "BIGNUM *a"
	20	.Fc
	21	.Ft const BIGNUM *
	22	.Fo BN_value_one
	23	.Fa void
	24	.Fc
	25	.Ft int
	26	.Fo BN_set_word
	27	.Fa "BIGNUM *a"
	28	.Fa "unsigned long w"
	29	.Fc
	30	.Ft unsigned long
	31	.Fo BN_get_word
	32	.Fa "BIGNUM *a"
	33	.Fc
	34	.Sh DESCRIPTION
	35	.Fn BN_zero ,
	36	.Fn BN_one ,
	37	and
	38	.Fn BN_set_word
	39	set
	40	.Fa a
	41	to the values 0, 1 and
	42	.Fa w
	43	respectively.
	44	.Fn BN_zero
	45	and
	46	.Fn BN_one
	47	are macros.
	48	.Pp
	49	.Fn BN_value_one
	50	returns a
	51	.Vt BIGNUM
	52	constant of value 1.
	53	This constant is useful for use in comparisons and assignment.
	54	.Pp
	55	.Fn BN_get_word
	56	returns
	57	.Fa a
	58	if it can be represented as an
	59	.Vt unsigned long .
	60	.Sh RETURN VALUES
	61	.Fn BN_get_word
	62	returns the value
	63	.Fa a ,
	64	or 0xffffffffL if
	65	.Fa a
	66	cannot be represented as an
	67	.Vt unsigned long .
	68	.Pp
	69	.Fn BN_zero ,
	70	.Fn BN_one ,
	71	and
	72	.Fn BN_set_word
	73	return 1 on success, 0 otherwise.
	74	.Fn BN_value_one
	75	returns the constant.
	76	.Sh SEE ALSO
	77	.Xr bn 3 ,
	78	.Xr BN_bn2bin 3
	79	.Sh HISTORY
	80	.Fn BN_zero ,
	81	.Fn BN_one ,
	82	and
	83	.Fn BN_set_word
	84	are available in all versions of SSLeay and OpenSSL.
	85	.Fn BN_value_one
	86	and
	87	.Fn BN_get_word
	88	were added in SSLeay 0.8.
	89	.Pp
	90	.Fn BN_value_one
	91	was changed to return a true
	92	.Vt const BIGNUM *
	93	in OpenSSL 0.9.7.
	94	.Sh BUGS
	95	Someone might change the constant.
	96	.Pp
	97	If a
	98	.Vt BIGNUM
	99	is equal to 0xffffffffL it can be represented as an
	100	.Vt unsigned long
	101	but this value is also returned on error.