ReadIvParameter() [2/2]

static void System.Security.Cryptography.PasswordBasedEncryption.ReadIvParameter ( ReadOnlyMemory< byte >? encryptionSchemeParameters, int length, ref Span< byte > iv )

inlinestaticprivate

Definition at line 425 of file PasswordBasedEncryption.cs.

    {
        if (!encryptionSchemeParameters.HasValue)
        {
            throw new CryptographicException(System.SR.Cryptography_Der_Invalid_Encoding);
        }
        try
        {
            ReadOnlySpan<byte> span = encryptionSchemeParameters.Value.Span;
            if (!AsnDecoder.TryReadOctetString(span, iv, AsnEncodingRules.BER, out var bytesConsumed, out var bytesWritten) || bytesWritten != length || bytesConsumed != span.Length)
            {
                throw new CryptographicException(System.SR.Cryptography_Der_Invalid_Encoding);
            }
            iv = iv.Slice(0, bytesWritten);
        }
        catch (AsnContentException inner)
        {
            throw new CryptographicException(System.SR.Cryptography_Der_Invalid_Encoding, inner);
        }
    }

References System.SR.Cryptography_Der_Invalid_Encoding, System.length, System.ReadOnlySpan< T >.Length, System.ReadOnlyMemory< T >.Span, and System.Formats.Asn1.AsnDecoder.TryReadOctetString().