Invalid toString() output

After generating test RSA keypair with...

const algorithmParameters = getAlgorithmParameters('RSASSA-PKCS1-v1_5', 'generateKey');
const rsaAlgorithmParameters = <RsaHashedKeyGenParams>algorithmParameters.algorithm;
rsaAlgorithmParameters.modulusLength = 2048;
keyPair = await crypto.subtle.generateKey(
    rsaAlgorithmParameters,
    true,
    algorithmParameters.usages
);

const publicKeyBinary = await crypto.subtle.exportKey('spki', kp.publicKey);
const publicKeyInfo = new PublicKeyInfo({ schema: fromBER(publicKeyBinary).result });

...printing publicKeyInfo schema gives us:

publicKeyInfo.toSchema().toString():

SEQUENCE :
  SEQUENCE :
    OBJECT IDENTIFIER : 1.2.840.113549.1.1.1
    NULL
  BIT STRING :
    SEQUENCE :
      INTEGER : 24887239087236848835526455641984843727463826139174050791691976561813953102839064429332886583429049160350598106341102486041132463383483793910295655528138611319643131023179694915676507595776505615873833975566765167399713675049313996204355217920734848317005839682095861889918814144302793495250968976180203548484844263524114915481464779142152976581678119619878801586449552468768791950354673050356896621271322944204354661760686053604647603613226376137125123895932222597313154554956240685352982635857906561526419690861369451743559762715051816841573592592434576283685317978531359813181377064108343414478911905683769951525527
      INTEGER : 65537

publicKeyInfo.toSchema().toString('hex'):

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

Exporting unencrypted priv key from keyPair as above to PKCS#8 PEM gives us:

After importing such privkey from PEM and generating PublicKeyInfo from it with...

const privateKeyDER = fromPEM(await readFileAsText(file));
const crypto = getCrypto(true);

const algorithmParameters = getAlgorithmParameters('RSASSA-PKCS1-v1_5', 'importKey');
const rsaAlgorithmParameters = <RsaHashedImportParams>algorithmParameters.algorithm;
const privateKey = await crypto.subtle.importKey(
    'pkcs8',
    privateKeyDER,
    rsaAlgorithmParameters,
    true,
    ['sign']
);

const privateKeyInfo = new PrivateKeyInfo({ schema: fromBER(privateKeyDER).result });
const privateRSAKey = <RSAPrivateKey>privateKeyInfo.parsedKey;

const publicRSAKey = new RSAPublicKey({
    modulus: privateRSAKey.modulus,
    publicExponent: privateRSAKey.publicExponent
});

const algorithmIdentifier = new AlgorithmIdentifier({
    algorithmId: '1.2.840.113549.1.1.1', // RSA
    algorithmParams: new Null()
});

publicKeyInfo = new PublicKeyInfo({
    parsedKey: publicRSAKey,
    algorithm: algorithmIdentifier,
    subjectPublicKey: new BitString({ valueHex: publicRSAKey.toSchema().toBER(false) })
});

...printing publicKeyInfo schema gives us:

publicKeyInfo.toSchema().toString():

SEQUENCE :
  SEQUENCE :
    OBJECT IDENTIFIER : 1.2.840.113549.1.1.1
    NULL
  BIT STRING : 001100001000001000000001000010100000001010000010000000010000000100000000110001010010010100011000101110011110111111010000010011110100010011001001110011010111101000010011011110000111010001100000100010010000000101100110101100001100001001011100110010000111110111011010000011011000001111010111111110101100011001000111001000011100101110011101100110111010100000110011010111001010100011110111001101011011111011111000111001001011011000110000010101110100111110111011010010110010001011010110011000011000011100110000010010001001100011010101101100111101010000101101001101110110001000000111000101011101011010000011011100100110010111001101001000110101001111110010000101011100111111101110000010110001100101100100110110100011101100011010011010111100011101100010010110011110101000011100110010101001010110101010011010011101111000111011101111011010100100001000010110010110010100010110110110001100011011110110100000001111011100100010111110011100100001111010001010010011110011101001101001010100110011001000000100011111100001011010100101001110010011100011110001001101110000101110001101010100101011011101101010100011100110110001100100000110111001001100010100000110001000011000110100111101001001010001111110001110000100010101000110010101111011011011010100100001110110000011111101011011110010101101111111001111101110100101100100111101011010010010000100011011100111010011111110101001010100111101001000111110100010110001001100010000010100110111000110001010011001011111111001111011010110100100111011001011101011001001110011101111100101010101001110001010100110000001000010010011101111000100001010100111000011010001011001110000100101110001011111101100011000000010000110001000110011001110000011100110010100010011011010100000010100101011010000100101011101100000111101010100111111000001110010101010010101000110011110110010001111001101101010111000110110111011000101101111100100001010100100010011001000100101000100011011110100101110000011101010000000000110011000101110010110101010000001010011011011110100000000100010111111110001111010010101000101000101011100100110011011111001001000101001011111000101001100100111100110100101101011000110100000011010100101110000001000000011000000010000000000000001

publicKeyInfo.toSchema().toString('hex'):

30820122300d06092a864886f70d01010105000382010f003082010a0282010100c52518b9efd04f44c9cd7a13787460890166b0c25cc87dda0d83d7fac64721cb9d9ba8335ca8f735bef8e4b630574fbb4b22d66187304898d5b3d42d37620715d6837265cd2353f215cfee0b1964da3b1a6bc76259ea1cca95aa69de3bbda908596516d8c6f680f722f9c87a293ce9a54cc811f85a94e4e3c4dc2e354addaa39b1906e4c506218d3d251f8e115195edb521d83f5bcadfcfba593d69211b9d3fa953d23e8b131053718a65fe7b5a4ecbac9cef95538a981093bc42a70d16709717ec602188cce0e65136a052b425760f54fc1caa5467b23cdab8dbb16f90a91322511bd2e0ea00662e5aa0536f4022ff1e951457266f92297c53279a5ac681a970203010001

Importing pubkey from such publicKeyInfo works fine with

const publicKey = await crypto.subtle.importKey(
    'spki',
    publicKeyInfo.toSchema().toBER(false),
    rsaAlgorithmParameters,
    true,
    algorithmParameters.usages
);

Seems there is some bug in publicKeyInfo.toSchema().toString() because second output is different from first and both publicKeyInfo.toSchema().toString('hex') outputs are identical (and public key after importing in spki mode as above looks fine).

PeculiarVentures / PKI.js

Invalid toString() output #398