github.com/Lephar/snapd@v0.0.0-20210825215435-c7fba9cef4d2/asserts/digest_test.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2015 Canonical Ltd
     5   *
     6   * This program is free software: you can redistribute it and/or modify
     7   * it under the terms of the GNU General Public License version 3 as
     8   * published by the Free Software Foundation.
     9   *
    10   * This program is distributed in the hope that it will be useful,
    11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13   * GNU General Public License for more details.
    14   *
    15   * You should have received a copy of the GNU General Public License
    16   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17   *
    18   */
    19  
    20  package asserts_test
    21  
    22  import (
    23  	"crypto"
    24  	_ "crypto/sha256"
    25  	"encoding/base64"
    26  
    27  	. "gopkg.in/check.v1"
    28  
    29  	"github.com/snapcore/snapd/asserts"
    30  )
    31  
    32  type encodeDigestSuite struct{}
    33  
    34  var _ = Suite(&encodeDigestSuite{})
    35  
    36  func (eds *encodeDigestSuite) TestEncodeDigestOK(c *C) {
    37  	h := crypto.SHA512.New()
    38  	h.Write([]byte("some stuff to hash"))
    39  	digest := h.Sum(nil)
    40  	encoded, err := asserts.EncodeDigest(crypto.SHA512, digest)
    41  	c.Assert(err, IsNil)
    42  
    43  	decoded, err := base64.RawURLEncoding.DecodeString(encoded)
    44  	c.Assert(err, IsNil)
    45  	c.Check(decoded, DeepEquals, digest)
    46  
    47  	// sha3-384
    48  	b, err := base64.RawURLEncoding.DecodeString(blobSHA3_384)
    49  	c.Assert(err, IsNil)
    50  	encoded, err = asserts.EncodeDigest(crypto.SHA3_384, b)
    51  	c.Assert(err, IsNil)
    52  	c.Check(encoded, Equals, blobSHA3_384)
    53  
    54  }
    55  
    56  func (eds *encodeDigestSuite) TestEncodeDigestErrors(c *C) {
    57  	_, err := asserts.EncodeDigest(crypto.SHA1, nil)
    58  	c.Check(err, ErrorMatches, "unsupported hash")
    59  
    60  	_, err = asserts.EncodeDigest(crypto.SHA512, []byte{1, 2})
    61  	c.Check(err, ErrorMatches, "hash digest by sha512 should be 64 bytes")
    62  
    63  	_, err = asserts.EncodeDigest(crypto.SHA3_384, []byte{1, 2})
    64  	c.Check(err, ErrorMatches, "hash digest by sha3-384 should be 48 bytes")
    65  }