Deprecate the ECDSA and EV_KEY_METHOD functions.

[openssl.git] / doc / man3 / ECDSA_SIG_new.pod

diff --git a/doc/man3/ECDSA_SIG_new.pod b/doc/man3/ECDSA_SIG_new.pod
index e99a8237c65cf9d3875e6f1ea493152906082b10..4364297e6fde4535014c3db613b269e4a41cdcf9 100644 (file)
--- a/doc/man3/ECDSA_SIG_new.pod
+++ b/doc/man3/ECDSA_SIG_new.pod
@@ -3,10 +3,10 @@
 =head1 NAME
 
 ECDSA_SIG_get0, ECDSA_SIG_get0_r, ECDSA_SIG_get0_s, ECDSA_SIG_set0,
-ECDSA_SIG_new, ECDSA_SIG_free, i2d_ECDSA_SIG, d2i_ECDSA_SIG, ECDSA_size,
-ECDSA_sign, ECDSA_do_sign, ECDSA_verify, ECDSA_do_verify, ECDSA_sign_setup,
-ECDSA_sign_ex, ECDSA_do_sign_ex - low level elliptic curve digital signature
-algorithm (ECDSA) functions
+ECDSA_SIG_new, ECDSA_SIG_free, ECDSA_size, ECDSA_sign, ECDSA_do_sign,
+ECDSA_verify, ECDSA_do_verify, ECDSA_sign_setup, ECDSA_sign_ex,
+ECDSA_do_sign_ex - low level elliptic curve digital signature algorithm (ECDSA)
+functions
 
 =head1 SYNOPSIS
 
@@ -18,8 +18,11 @@ algorithm (ECDSA) functions
  const BIGNUM *ECDSA_SIG_get0_r(const ECDSA_SIG *sig);
  const BIGNUM *ECDSA_SIG_get0_s(const ECDSA_SIG *sig);
  int ECDSA_SIG_set0(ECDSA_SIG *sig, BIGNUM *r, BIGNUM *s);
- int i2d_ECDSA_SIG(const ECDSA_SIG *sig, unsigned char **pp);
- ECDSA_SIG *d2i_ECDSA_SIG(ECDSA_SIG **sig, const unsigned char **pp, long len);
+
+Deprecated since OpenSSL 3.0, can be hidden entirely by defining
+B<OPENSSL_API_COMPAT> with a suitable version value, see
+L<openssl_user_macros(7)>:
+
  int ECDSA_size(const EC_KEY *eckey);
 
  int ECDSA_sign(int type, const unsigned char *dgst, int dgstlen,
@@ -42,10 +45,6 @@ algorithm (ECDSA) functions
 
 =head1 DESCRIPTION
 
-Note: these functions provide a low level interface to ECDSA. Most
-applications should use the higher level B<EVP> interface such as
-L<EVP_DigestSignInit(3)> or L<EVP_DigestVerifyInit(3)> instead.
-
 B<ECDSA_SIG> is an opaque structure consisting of two BIGNUMs for the
 B<r> and B<s> value of an ECDSA signature (see X9.62 or FIPS 186-2).
 
@@ -68,18 +67,16 @@ function transfers the memory management of the values to the ECDSA_SIG object,
 and therefore the values that have been passed in should not be freed directly
 after this function has been called.
 
-i2d_ECDSA_SIG() creates the DER encoding of the ECDSA signature B<sig> and
-writes the encoded signature to B<*pp> (note: if B<pp> is NULL i2d_ECDSA_SIG()
-returns the expected length in bytes of the DER encoded signature).
-i2d_ECDSA_SIG() returns the length of the DER encoded signature (or 0 on
-error).
+See L<i2d_ECDSA_SIG(3)> and L<d2i_ECDSA_SIG(3)> for information about encoding
+and decoding ECDSA signatures to/from DER.
 
-d2i_ECDSA_SIG() decodes a DER encoded ECDSA signature and returns the decoded
-signature in a newly allocated B<ECDSA_SIG> structure. B<*sig> points to the
-buffer containing the DER encoded signature of size B<len>.
+All of the functions described below are deprecated. Applications should
+use the higher level B<EVP> interface such as L<EVP_DigestSignInit(3)>
+or L<EVP_DigestVerifyInit(3)> instead.
 
 ECDSA_size() returns the maximum length of a DER encoded ECDSA signature
-created with the private EC key B<eckey>.
+created with the private EC key B<eckey>. To obtain the actual signature
+size use L<EVP_PKEY_sign(3)> with a NULL B<sig> parameter.
 
 ECDSA_sign() computes a digital signature of the B<dgstlen> bytes hash value
 B<dgst> using the private EC key B<eckey>. The DER encoded signatures is
@@ -202,7 +199,16 @@ ANSI X9.62, US Federal Information Processing Standard FIPS 186-2
 
 L<EC_KEY_new(3)>,
 L<EVP_DigestSignInit(3)>,
-L<EVP_DigestVerifyInit(3)>
+L<EVP_DigestVerifyInit(3)>,
+L<EVP_PKEY_sign(3)>
+L<i2d_ECDSA_SIG(3)>,
+L<d2i_ECDSA_SIG(3)>
+
+=head1 HISTORY
+
+The ECDSA_size(), ECDSA_sign(), ECDSA_do_sign(), ECDSA_verify(),
+ECDSA_do_verify(), ECDSA_sign_setup(), ECDSA_sign_ex() and ECDSA_do_sign_ex()
+functions were deprecated in OpenSSL 3.0.
 
 =head1 COPYRIGHT