Split three new manual pages EVP_CIPHER_nid(3), EVP_CIPHER_CTX_ctrl(3),

and EVP_CIPHER_CTX_set_flags(3) out of the excessively large and
unwieldy EVP_EncryptInit(3).  This causes a number of inaccuracies
and gaps to stand out, but i'm not mixing text changes or content
additions into this split.

Using very useful feedback from tb@ regarding what belongs together
and how important the various functions are.  I refrained from bothering
him with the complete patch, but he likes the general direction.

1 files changed, 15 insertions, 448 deletions

diff --git a/src/lib/libcrypto/man/EVP_EncryptInit.3 b/src/lib/libcrypto/man/EVP_EncryptInit.3
index b6d9080bea..ddec4e7e79 100644
--- a/src/lib/libcrypto/man/EVP_EncryptInit.3
+++ b/src/lib/libcrypto/man/EVP_EncryptInit.3
@@ -1,4 +1,4 @@
-.\" $OpenBSD: EVP_EncryptInit.3,v 1.47 2023/08/26 15:01:56 schwarze Exp $
+.\" $OpenBSD: EVP_EncryptInit.3,v 1.48 2023/08/31 17:27:41 schwarze Exp $
 .\" full merge up to: OpenSSL 5211e094 Nov 11 14:39:11 2014 -0800
 .\"   EVP_bf_cbc.pod EVP_cast5_cbc.pod EVP_idea_cbc.pod EVP_rc2_cbc.pod
 .\"   7c6d372a Nov 20 13:20:01 2018 +0000
@@ -69,7 +69,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 .\" OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: August 26 2023 $
+.Dd $Mdocdate: August 31 2023 $
 .Dt EVP_ENCRYPTINIT 3
 .Os
 .Sh NAME
@@ -96,37 +96,10 @@
 .Nm EVP_CipherFinal ,
 .Nm EVP_Cipher ,
 .Nm EVP_CIPHER_CTX_encrypting ,
-.Nm EVP_CIPHER_CTX_set_flags ,
-.Nm EVP_CIPHER_CTX_clear_flags ,
-.Nm EVP_CIPHER_CTX_test_flags ,
-.Nm EVP_CIPHER_CTX_set_padding ,
-.Nm EVP_CIPHER_CTX_set_key_length ,
-.Nm EVP_CIPHER_CTX_ctrl ,
-.Nm EVP_CIPHER_CTX_rand_key ,
 .Nm EVP_get_cipherbyname ,
 .Nm EVP_get_cipherbynid ,
 .Nm EVP_get_cipherbyobj ,
-.Nm EVP_CIPHER_nid ,
-.Nm EVP_CIPHER_block_size ,
-.Nm EVP_CIPHER_key_length ,
-.Nm EVP_CIPHER_iv_length ,
-.Nm EVP_CIPHER_flags ,
-.Nm EVP_CIPHER_mode ,
-.Nm EVP_CIPHER_type ,
 .Nm EVP_CIPHER_CTX_cipher ,
-.Nm EVP_CIPHER_CTX_nid ,
-.Nm EVP_CIPHER_CTX_block_size ,
-.Nm EVP_CIPHER_CTX_key_length ,
-.Nm EVP_CIPHER_CTX_iv_length ,
-.Nm EVP_CIPHER_CTX_get_iv ,
-.Nm EVP_CIPHER_CTX_set_iv ,
-.Nm EVP_CIPHER_CTX_get_app_data ,
-.Nm EVP_CIPHER_CTX_set_app_data ,
-.Nm EVP_CIPHER_CTX_type ,
-.Nm EVP_CIPHER_CTX_flags ,
-.Nm EVP_CIPHER_CTX_mode ,
-.Nm EVP_CIPHER_param_to_asn1 ,
-.Nm EVP_CIPHER_asn1_to_param ,
 .Nm EVP_enc_null ,
 .Nm EVP_idea_cbc ,
 .Nm EVP_idea_ecb ,
@@ -294,43 +267,6 @@
 .Fo EVP_CIPHER_CTX_encrypting
 .Fa "const EVP_CIPHER_CTX *ctx"
 .Fc
-.Ft void
-.Fo EVP_CIPHER_CTX_set_flags
-.Fa "EVP_CIPHER_CTX *ctx"
-.Fa "int flags"
-.Fc
-.Ft void
-.Fo EVP_CIPHER_CTX_clear_flags
-.Fa "EVP_CIPHER_CTX *ctx"
-.Fa "int flags"
-.Fc
-.Ft int
-.Fo EVP_CIPHER_CTX_test_flags
-.Fa "EVP_CIPHER_CTX *ctx"
-.Fa "int flags"
-.Fc
-.Ft int
-.Fo EVP_CIPHER_CTX_set_padding
-.Fa "EVP_CIPHER_CTX *x"
-.Fa "int padding"
-.Fc
-.Ft int
-.Fo EVP_CIPHER_CTX_set_key_length
-.Fa "EVP_CIPHER_CTX *x"
-.Fa "int keylen"
-.Fc
-.Ft int
-.Fo EVP_CIPHER_CTX_ctrl
-.Fa "EVP_CIPHER_CTX *ctx"
-.Fa "int type"
-.Fa "int arg"
-.Fa "void *ptr"
-.Fc
-.Ft int
-.Fo EVP_CIPHER_CTX_rand_key
-.Fa "EVP_CIPHER_CTX *ctx"
-.Fa "unsigned char *key"
-.Fc
 .Ft const EVP_CIPHER *
 .Fo EVP_get_cipherbyname
 .Fa "const char *name"
@@ -343,97 +279,10 @@
 .Fo EVP_get_cipherbyobj
 .Fa "const ASN1_OBJECT *a"
 .Fc
-.Ft int
-.Fo EVP_CIPHER_nid
-.Fa "const EVP_CIPHER *e"
-.Fc
-.Ft int
-.Fo EVP_CIPHER_block_size
-.Fa "const EVP_CIPHER *e"
-.Fc
-.Ft int
-.Fo EVP_CIPHER_key_length
-.Fa "const EVP_CIPHER *e"
-.Fc
-.Ft int
-.Fo EVP_CIPHER_iv_length
-.Fa "const EVP_CIPHER *e"
-.Fc
-.Ft unsigned long
-.Fo EVP_CIPHER_flags
-.Fa "const EVP_CIPHER *e"
-.Fc
-.Ft unsigned long
-.Fo EVP_CIPHER_mode
-.Fa "const EVP_CIPHER *e"
-.Fc
-.Ft int
-.Fo EVP_CIPHER_type
-.Fa "const EVP_CIPHER *ctx"
-.Fc
 .Ft const EVP_CIPHER *
 .Fo EVP_CIPHER_CTX_cipher
 .Fa "const EVP_CIPHER_CTX *ctx"
 .Fc
-.Ft int
-.Fo EVP_CIPHER_CTX_nid
-.Fa "const EVP_CIPHER_CTX *ctx"
-.Fc
-.Ft int
-.Fo EVP_CIPHER_CTX_block_size
-.Fa "const EVP_CIPHER_CTX *ctx"
-.Fc
-.Ft int
-.Fo EVP_CIPHER_CTX_key_length
-.Fa "const EVP_CIPHER_CTX *ctx"
-.Fc
-.Ft int
-.Fo EVP_CIPHER_CTX_iv_length
-.Fa "const EVP_CIPHER_CTX *ctx"
-.Fc
-.Ft int
-.Fo EVP_CIPHER_CTX_get_iv
-.Fa "const EVP_CIPHER_CTX *ctx"
-.Fa "unsigned char *iv"
-.Fa "size_t len"
-.Fc
-.Ft int
-.Fo EVP_CIPHER_CTX_set_iv
-.Fa "EVP_CIPHER_CTX *ctx"
-.Fa "const unsigned char *iv"
-.Fa "size_t len"
-.Fc
-.Ft void *
-.Fo EVP_CIPHER_CTX_get_app_data
-.Fa "const EVP_CIPHER_CTX *ctx"
-.Fc
-.Ft void
-.Fo EVP_CIPHER_CTX_set_app_data
-.Fa "const EVP_CIPHER_CTX *ctx"
-.Fa "void *data"
-.Fc
-.Ft int
-.Fo EVP_CIPHER_CTX_type
-.Fa "const EVP_CIPHER_CTX *ctx"
-.Fc
-.Ft unsigned long
-.Fo EVP_CIPHER_CTX_flags
-.Fa "const EVP_CIPHER_CTX *ctx"
-.Fc
-.Ft unsigned long
-.Fo EVP_CIPHER_CTX_mode
-.Fa "const EVP_CIPHER_CTX *ctx"
-.Fc
-.Ft int
-.Fo EVP_CIPHER_param_to_asn1
-.Fa "EVP_CIPHER_CTX *c"
-.Fa "ASN1_TYPE *type"
-.Fc
-.Ft int
-.Fo EVP_CIPHER_asn1_to_param
-.Fa "EVP_CIPHER_CTX *c"
-.Fa "ASN1_TYPE *type"
-.Fc
 .Sh DESCRIPTION
 The EVP cipher routines are a high level interface to certain symmetric
 ciphers.
@@ -492,7 +341,7 @@ and
 objects used by
 .Fa in
 and any application specific data set with
-.Fn EVP_CIPHER_CTX_set_app_data
+.Xr EVP_CIPHER_CTX_set_app_data 3
 are not copied and
 .Fa out
 will point to the same three objects.
@@ -507,7 +356,7 @@ If the bit
 .Dv EVP_CIPH_CUSTOM_COPY
 has been set with
 .Xr EVP_CIPHER_meth_set_flags 3 ,
-.Fn EVP_CIPHER_CTX_ctrl
+.Xr EVP_CIPHER_CTX_ctrl 3
 is called at the end with arguments
 .Fa in ,
 .Dv EVP_CTRL_COPY ,
@@ -690,123 +539,6 @@ structure when passed a cipher name, a NID or an
 .Vt ASN1_OBJECT
 structure.
 .Pp
-.Fn EVP_CIPHER_nid
-and
-.Fn EVP_CIPHER_CTX_nid
-return the NID of a cipher when passed an
-.Vt EVP_CIPHER
-or
-.Vt EVP_CIPHER_CTX
-structure.
-The actual NID value is an internal value which may not have a
-corresponding OBJECT IDENTIFIER.
-.Pp
-.Fn EVP_CIPHER_CTX_set_flags
-enables the given
-.Fa flags
-in
-.Fa ctx .
-.Fn EVP_CIPHER_CTX_clear_flags
-disables the given
-.Fa flags
-in
-.Fa ctx .
-.Fn EVP_CIPHER_CTX_test_flags
-checks whether any of the given
-.Fa flags
-are currently set in
-.Fa ctx ,
-returning the subset of the
-.Fa flags
-that are set, or 0 if none of them are set.
-Currently, the only supported cipher context flag is
-.Dv EVP_CIPHER_CTX_FLAG_WRAP_ALLOW ;
-see
-.Xr EVP_aes_128_wrap 3
-for details.
-.Pp
-.Fn EVP_CIPHER_CTX_set_padding
-enables or disables padding.
-This function should be called after the context is set up for
-encryption or decryption with
-.Fn EVP_EncryptInit_ex ,
-.Fn EVP_DecryptInit_ex ,
-or
-.Fn EVP_CipherInit_ex .
-By default encryption operations are padded using standard block padding
-and the padding is checked and removed when decrypting.
-If the
-.Fa padding
-parameter is zero, then no padding is performed, the total amount of data
-encrypted or decrypted must then be a multiple of the block size or an
-error will occur.
-.Pp
-.Fn EVP_CIPHER_key_length
-and
-.Fn EVP_CIPHER_CTX_key_length
-return the key length of a cipher when passed an
-.Vt EVP_CIPHER
-or
-.Vt EVP_CIPHER_CTX
-structure.
-The constant
-.Dv EVP_MAX_KEY_LENGTH
-is the maximum key length for all ciphers.
-Note: although
-.Fn EVP_CIPHER_key_length
-is fixed for a given cipher, the value of
-.Fn EVP_CIPHER_CTX_key_length
-may be different for variable key length ciphers.
-.Pp
-.Fn EVP_CIPHER_CTX_set_key_length
-sets the key length of the cipher ctx.
-If the cipher is a fixed length cipher, then attempting to set the key
-length to any value other than the fixed value is an error.
-.Pp
-.Fn EVP_CIPHER_iv_length
-and
-.Fn EVP_CIPHER_CTX_iv_length
-return the IV length of a cipher when passed an
-.Vt EVP_CIPHER
-or
-.Vt EVP_CIPHER_CTX .
-It will return zero if the cipher does not use an IV.
-The constant
-.Dv EVP_MAX_IV_LENGTH
-is the maximum IV length for all ciphers.
-.Pp
-.Fn EVP_CIPHER_CTX_get_iv
-and
-.Fn EVP_CIPHER_CTX_set_iv
-will respectively retrieve and set the IV for an
-.Vt EVP_CIPHER_CTX .
-In both cases, the specified IV length must exactly equal the expected
-IV length for the context as returned by
-.Fn EVP_CIPHER_CTX_iv_length .
-.Pp
-.Fn EVP_CIPHER_block_size
-and
-.Fn EVP_CIPHER_CTX_block_size
-return the block size of a cipher when passed an
-.Vt EVP_CIPHER
-or
-.Vt EVP_CIPHER_CTX
-structure.
-The constant
-.Dv EVP_MAX_BLOCK_LENGTH
-is also the maximum block length for all ciphers.
-.Pp
-.Fn EVP_CIPHER_type
-and
-.Fn EVP_CIPHER_CTX_type
-return the type of the passed cipher or context.
-This "type" is the actual NID of the cipher OBJECT IDENTIFIER as such it
-ignores the cipher parameters and 40-bit RC2 and 128-bit RC2 have the
-same NID.
-If the cipher does not have an object identifier or does not
-have ASN.1 support, this function will return
-.Dv NID_undef .
-.Pp
 .Fn EVP_CIPHER_CTX_cipher
 returns the
 .Vt EVP_CIPHER
@@ -814,72 +546,6 @@ structure when passed an
 .Vt EVP_CIPHER_CTX
 structure.
 .Pp
-.Fn EVP_CIPHER_mode
-and
-.Fn EVP_CIPHER_CTX_mode
-return the block cipher mode:
-.Dv EVP_CIPH_ECB_MODE ,
-.Dv EVP_CIPH_CBC_MODE ,
-.Dv EVP_CIPH_CFB_MODE ,
-.Dv EVP_CIPH_OFB_MODE ,
-.Dv EVP_CIPH_CTR_MODE ,
-or
-.Dv EVP_CIPH_XTS_MODE .
-If the cipher is a stream cipher then
-.Dv EVP_CIPH_STREAM_CIPHER
-is returned.
-.Pp
-.Fn EVP_CIPHER_param_to_asn1
-sets the ASN.1
-.Vt AlgorithmIdentifier
-parameter based on the passed cipher.
-This will typically include any parameters and an IV.
-The cipher IV (if any) must be set when this call is made.
-This call should be made before the cipher is actually "used" (before any
-.Fn EVP_EncryptUpdate
-or
-.Fn EVP_DecryptUpdate
-calls, for example).
-This function may fail if the cipher does not have any ASN.1 support.
-.Pp
-.Fn EVP_CIPHER_asn1_to_param
-sets the cipher parameters based on an ASN.1
-.Vt AlgorithmIdentifier
-parameter.
-The precise effect depends on the cipher.
-In the case of RC2, for example, it will set the IV and effective
-key length.
-This function should be called after the base cipher type is set but
-before the key is set.
-For example
-.Fn EVP_CipherInit
-will be called with the IV and key set to
-.Dv NULL ,
-.Fn EVP_CIPHER_asn1_to_param
-will be called and finally
-.Fn EVP_CipherInit
-again with all parameters except the key set to
-.Dv NULL .
-It is possible for this function to fail if the cipher does not
-have any ASN.1 support or the parameters cannot be set (for example
-the RC2 effective key length is not supported).
-.Pp
-.Fn EVP_CIPHER_CTX_ctrl
-allows various cipher specific parameters to be determined and set.
-Currently only the RC2 effective key length can be set.
-.Pp
-.Fn EVP_CIPHER_CTX_rand_key
-generates a random key of the appropriate length based on the cipher
-context.
-The
-.Vt EVP_CIPHER
-can provide its own random key generation routine to support keys
-of a specific form.
-The
-.Fa key
-argument must point to a buffer at least as big as the value returned by
-.Fn EVP_CIPHER_CTX_key_length .
-.Pp
 Where possible the EVP interface to symmetric ciphers should be
 used in preference to the low level interfaces.
 This is because the code then becomes transparent to the cipher used and
@@ -938,8 +604,6 @@ for failure.
 .Fn EVP_CIPHER_CTX_reset ,
 .Fn EVP_CIPHER_CTX_cleanup ,
 .Fn EVP_CIPHER_CTX_copy ,
-.Fn EVP_CIPHER_CTX_get_iv ,
-.Fn EVP_CIPHER_CTX_set_iv ,
 .Fn EVP_EncryptInit_ex ,
 .Fn EVP_EncryptUpdate ,
 .Fn EVP_EncryptFinal_ex ,
@@ -955,10 +619,8 @@ for failure.
 .Fn EVP_DecryptFinal ,
 .Fn EVP_CipherInit ,
 .Fn EVP_CipherFinal ,
-.Fn EVP_Cipher ,
-.Fn EVP_CIPHER_CTX_set_key_length ,
 and
-.Fn EVP_CIPHER_CTX_rand_key
+.Fn EVP_Cipher
 return 1 for success or 0 for failure.
 .Pp
 .Fn EVP_CIPHER_CTX_encrypting
@@ -967,18 +629,6 @@ returns 1 if
 is initialized for encryption or 0 otherwise, in which case
 it may be uninitialized or initialized for decryption.
 .Pp
-.Fn EVP_CIPHER_CTX_set_padding
-always returns 1.
-.Pp
-.Fn EVP_CIPHER_CTX_ctrl
-usually returns 1 for success, 0 for failure, or \-1 if the
-.Fa type
-is not supported by the
-.Fa ctx ,
-but there may be exceptions for some
-.Fa type
-arguments.
-.Pp
 .Fn EVP_get_cipherbyname ,
 .Fn EVP_get_cipherbynid ,
 and
@@ -989,43 +639,10 @@ structure or
 .Dv NULL
 on error.
 .Pp
-.Fn EVP_CIPHER_nid
-and
-.Fn EVP_CIPHER_CTX_nid
-return a NID.
-.Pp
-.Fn EVP_CIPHER_block_size
-and
-.Fn EVP_CIPHER_CTX_block_size
-return the block size.
-.Pp
-.Fn EVP_CIPHER_key_length
-and
-.Fn EVP_CIPHER_CTX_key_length
-return the key length.
-.Pp
-.Fn EVP_CIPHER_iv_length
-and
-.Fn EVP_CIPHER_CTX_iv_length
-return the IV length or zero if the cipher does not use an IV.
-.Pp
-.Fn EVP_CIPHER_type
-and
-.Fn EVP_CIPHER_CTX_type
-return the NID of the cipher's OBJECT IDENTIFIER or
-.Dv NID_undef
-if it has no defined OBJECT IDENTIFIER.
-.Pp
 .Fn EVP_CIPHER_CTX_cipher
 returns an
 .Vt EVP_CIPHER
 structure.
-.Pp
-.Fn EVP_CIPHER_param_to_asn1
-and
-.Fn EVP_CIPHER_asn1_to_param
-return greater than zero for success and zero or a negative number
-for failure.
 .Sh CIPHER LISTING
 All algorithms have a fixed key length unless otherwise stated.
 .Bl -tag -width Ds
@@ -1064,9 +681,9 @@ RC2 algorithm in CBC mode with a default key length and effective key
 length of 40 and 64 bits.
 These are obsolete and new code should use
 .Fn EVP_rc2_cbc ,
-.Fn EVP_CIPHER_CTX_set_key_length ,
+.Xr EVP_CIPHER_CTX_set_key_length 3 ,
 and
-.Fn EVP_CIPHER_CTX_ctrl
+.Xr EVP_CIPHER_CTX_ctrl 3
 to set the key length and effective key length.
 .It Xo
 .Fn EVP_bf_cbc ,
@@ -1310,7 +927,10 @@ do_crypt(FILE *in, FILE *out, int do_encrypt)
 .Xr EVP_aes_128_cbc 3 ,
 .Xr EVP_camellia_128_cbc 3 ,
 .Xr EVP_chacha20 3 ,
+.Xr EVP_CIPHER_CTX_ctrl 3 ,
 .Xr EVP_CIPHER_CTX_get_cipher_data 3 ,
+.Xr EVP_CIPHER_CTX_set_flags 3 ,
+.Xr EVP_CIPHER_nid 3 ,
 .Xr EVP_des_cbc 3 ,
 .Xr EVP_OpenInit 3 ,
 .Xr EVP_rc4 3 ,
@@ -1339,16 +959,7 @@ first appeared in SSLeay 0.5.1.
 and
 .Fn EVP_rc2_ofb
 first appeared in SSLeay 0.5.2.
-.Fn EVP_Cipher ,
-.Fn EVP_CIPHER_block_size ,
-.Fn EVP_CIPHER_key_length ,
-.Fn EVP_CIPHER_iv_length ,
-.Fn EVP_CIPHER_type ,
-.Fn EVP_CIPHER_CTX_block_size ,
-.Fn EVP_CIPHER_CTX_key_length ,
-.Fn EVP_CIPHER_CTX_iv_length ,
-and
-.Fn EVP_CIPHER_CTX_type
+.Fn EVP_Cipher
 first appeared in SSLeay 0.6.5.
 .Fn EVP_bf_cbc ,
 .Fn EVP_bf_ecb ,
@@ -1358,20 +969,13 @@ and
 first appeared in SSLeay 0.6.6.
 .Fn EVP_CIPHER_CTX_cleanup ,
 .Fn EVP_get_cipherbyobj ,
-.Fn EVP_CIPHER_nid ,
 .Fn EVP_CIPHER_CTX_cipher ,
-.Fn EVP_CIPHER_CTX_nid ,
-.Fn EVP_CIPHER_CTX_get_app_data ,
-.Fn EVP_CIPHER_CTX_set_app_data ,
 and
 .Fn EVP_enc_null
 first appeared in SSLeay 0.8.0.
 .Fn EVP_get_cipherbynid
 first appeared in SSLeay 0.8.1.
-.Fn EVP_CIPHER_CTX_init ,
-.Fn EVP_CIPHER_param_to_asn1 ,
-and
-.Fn EVP_CIPHER_asn1_to_param
+.Fn EVP_CIPHER_CTX_init
 first appeared in SSLeay 0.9.0.
 All these functions have been available since
 .Ox 2.4 .
@@ -1379,30 +983,16 @@ All these functions have been available since
 .Fn EVP_rc2_40_cbc
 and
 .Fn EVP_rc2_64_cbc
-first appeared in SSL_eay 0.9.1.
-.Fn EVP_CIPHER_CTX_type
-first appeared in OpenSSL 0.9.3.
-These functions have been available since
+first appeared in SSLeay 0.9.1 and have been available since
 .Ox 2.6 .
 .Pp
-.Fn EVP_CIPHER_CTX_set_key_length ,
-.Fn EVP_CIPHER_CTX_ctrl ,
-.Fn EVP_CIPHER_flags ,
-.Fn EVP_CIPHER_mode ,
-.Fn EVP_CIPHER_CTX_flags ,
-and
-.Fn EVP_CIPHER_CTX_mode
-first appeared in OpenSSL 0.9.6 and have been available since
-.Ox 2.9 .
-.Pp
 .Fn EVP_EncryptInit_ex ,
 .Fn EVP_EncryptFinal_ex ,
 .Fn EVP_DecryptInit_ex ,
 .Fn EVP_DecryptFinal_ex ,
 .Fn EVP_CipherInit_ex ,
-.Fn EVP_CipherFinal_ex ,
 and
-.Fn EVP_CIPHER_CTX_set_padding
+.Fn EVP_CipherFinal_ex
 first appeared in OpenSSL 0.9.7 and have been available since
 .Ox 3.2 .
 .Pp
@@ -1414,13 +1004,10 @@ and
 first appeared in OpenSSL 0.9.7e and have been available since
 .Ox 3.8 .
 .Pp
-.Fn EVP_CIPHER_CTX_rand_key
-first appeared in OpenSSL 0.9.8.
 .Fn EVP_CIPHER_CTX_new
 and
 .Fn EVP_CIPHER_CTX_free
-first appeared in OpenSSL 0.9.8b.
-These functions have been available since
+first appeared in OpenSSL 0.9.8b and have been available since
 .Ox 4.5 .
 .Pp
 .Fn EVP_CIPHER_CTX_copy
@@ -1435,27 +1022,7 @@ first appeared in OpenSSL 1.1.0 and has been available since
 .Fn EVP_CIPHER_CTX_encrypting
 first appeared in OpenSSL 1.1.0 and has been available since
 .Ox 6.4 .
-.Pp
-.Fn EVP_CIPHER_CTX_get_iv
-and
-.Fn EVP_CIPHER_CTX_set_iv
-first appeared in LibreSSL 2.8.1 and have been available since
-.Ox 6.4 .
 .Sh BUGS
-.Dv EVP_MAX_KEY_LENGTH
-and
-.Dv EVP_MAX_IV_LENGTH
-only refer to the internal ciphers with default key lengths.
-If custom ciphers exceed these values, the results are unpredictable.
-This is because it has become standard practice to define a generic key
-as a fixed unsigned char array containing
-.Dv EVP_MAX_KEY_LENGTH
-bytes.
-.Pp
-The ASN.1 code is incomplete (and sometimes inaccurate).
-It has only been tested for certain common S/MIME ciphers
-(RC2, DES, triple DES) in CBC mode.
-.Pp
 .Fn EVP_CIPHER_CTX_copy
 may already have cleared the data in
 .Fa out