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[ruby/openssl] pkey/ec: deprecate OpenSSL::PKey::EC::Point#mul(ary, ary [, bn])

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Deprecate it for future removal. However, I do not expect any
application is affected by this.

The other form of calling it, PKey::EC::Point#mul(bn [, bn]) remains
untouched.

PKey::EC::Point#mul calls EC_POINTs_mul(3) when multiple BNs
are given as an array. LibreSSL 2.8.0 released on 2018-08 removed the
feature and OpenSSL 3.0 which is planned to be released in 2020 will
also deprecate the function as there is no real use-case.

https://github.com/ruby/openssl/commit/812de4253d
This commit is contained in:
Kazuki Yamaguchi 2020-05-18 15:43:18 +09:00
parent 15863069c9
commit fde9f806cb
Notes: git 2021-03-16 20:38:50 +09:00 
Merged: https://github.com/ruby/ruby/pull/4275
2 changed files with 27 additions and 15 deletions
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8
ext/openssl/ossl_pkey_ec.c
View File

@ -1505,6 +1505,10 @@ static VALUE ossl_ec_point_mul(int argc, VALUE *argv, VALUE self)
if (EC_POINT_mul(group, point_result, bn_g, point_self, bn, ossl_bn_ctx) != 1)
ossl_raise(eEC_POINT, NULL);
} else {
#if OPENSSL_VERSION_MAJOR+0 >= 3 || defined(LIBRESSL_VERSION_NUMBER)
rb_raise(rb_eNotImpError, "calling #mul with arrays is not" \
"supported by this OpenSSL version");
#else
/*
* bignums | arg1[0] | arg1[1] | arg1[2] | ...
* points | self | arg2[0] | arg2[1] | ...
@ -1519,6 +1523,9 @@ static VALUE ossl_ec_point_mul(int argc, VALUE *argv, VALUE self)
if (RARRAY_LEN(arg1) != RARRAY_LEN(arg2) + 1) /* arg2 must be 1 larger */
ossl_raise(rb_eArgError, "bns must be 1 longer than points; see the documentation");
rb_warning("OpenSSL::PKey::EC::Point#mul(ary, ary) is deprecated; " \
"use #mul(bn) form instead");
num = RARRAY_LEN(arg1);
bns_tmp = rb_ary_tmp_new(num);
bignums = ALLOCV_N(const BIGNUM *, tmp_b, num);
@ -1544,6 +1551,7 @@ static VALUE ossl_ec_point_mul(int argc, VALUE *argv, VALUE self)
ALLOCV_END(tmp_b);
ALLOCV_END(tmp_p);
#endif
}
return result;

34
test/openssl/test_pkey_ec.rb
View File

@ -349,21 +349,28 @@ class OpenSSL::TestEC < OpenSSL::PKeyTestCase
# 3 * (6, 3) + 3 * (5, 1) = (7, 6)
result_a2 = point_a.mul(3, 3)
assert_equal B(%w{ 04 07 06 }), result_a2.to_octet_string(:uncompressed)
# 3 * point_a = 3 * (6, 3) = (16, 13)
result_b1 = point_a.mul([3], [])
assert_equal B(%w{ 04 10 0D }), result_b1.to_octet_string(:uncompressed)
# 3 * point_a + 2 * point_a = 3 * (6, 3) + 2 * (6, 3) = (7, 11)
begin
EnvUtil.suppress_warning do # Point#mul(ary, ary [, bn]) is deprecated
begin
result_b1 = point_a.mul([3], [])
rescue NotImplementedError
# LibreSSL and OpenSSL 3.0 do no longer support this form of calling
next
end
# 3 * point_a = 3 * (6, 3) = (16, 13)
result_b1 = point_a.mul([3], [])
assert_equal B(%w{ 04 10 0D }), result_b1.to_octet_string(:uncompressed)
# 3 * point_a + 2 * point_a = 3 * (6, 3) + 2 * (6, 3) = (7, 11)
result_b1 = point_a.mul([3, 2], [point_a])
rescue OpenSSL::PKey::EC::Point::Error
# LibreSSL doesn't support multiple entries in first argument
raise if $!.message !~ /called a function you should not call/
else
assert_equal B(%w{ 04 07 0B }), result_b1.to_octet_string(:uncompressed)
# 3 * point_a + 5 * point_a.group.generator = 3 * (6, 3) + 5 * (5, 1) = (13, 10)
result_b1 = point_a.mul([3], [], 5)
assert_equal B(%w{ 04 0D 0A }), result_b1.to_octet_string(:uncompressed)
assert_raise(ArgumentError) { point_a.mul([1], [point_a]) }
assert_raise(TypeError) { point_a.mul([1], nil) }
assert_raise(TypeError) { point_a.mul([nil], []) }
end
# 3 * point_a + 5 * point_a.group.generator = 3 * (6, 3) + 5 * (5, 1) = (13, 10)
result_b1 = point_a.mul([3], [], 5)
assert_equal B(%w{ 04 0D 0A }), result_b1.to_octet_string(:uncompressed)
rescue OpenSSL::PKey::EC::Group::Error
# CentOS patches OpenSSL to reject curves defined over Fp where p < 256 bits
raise if $!.message !~ /unsupported field/
@ -376,9 +383,6 @@ class OpenSSL::TestEC < OpenSSL::PKeyTestCase
# invalid argument
point = p256_key.public_key
assert_raise(TypeError) { point.mul(nil) }
assert_raise(ArgumentError) { point.mul([1], [point]) }
assert_raise(TypeError) { point.mul([1], nil) }
assert_raise(TypeError) { point.mul([nil], []) }
end
# test Group: asn1_flag, point_conversion