diff options
Diffstat (limited to 'crypto/src/asn1/DerApplicationSpecific.cs')
| -rw-r--r-- | crypto/src/asn1/DerApplicationSpecific.cs | 33 |
1 files changed, 11 insertions, 22 deletions
diff --git a/crypto/src/asn1/DerApplicationSpecific.cs b/crypto/src/asn1/DerApplicationSpecific.cs index 52467fabe..a2d57bf9d 100644 --- a/crypto/src/asn1/DerApplicationSpecific.cs +++ b/crypto/src/asn1/DerApplicationSpecific.cs @@ -199,38 +199,27 @@ namespace Org.BouncyCastle.Asn1 { int tagNo = input[0] & 0x1f; int index = 1; - // - // with tagged object tag number is bottom 5 bits, or stored at the start of the content - // + + // with tagged object tag number is bottom 5 bits, or stored at the start of the content if (tagNo == 0x1f) { - tagNo = 0; - - int b = input[index++] & 0xff; + int b = input[index++]; - // X.690-0207 8.1.2.4.2 + // X.690-0207 8.1.2.4.2 // "c) bits 7 to 1 of the first subsequent octet shall not all be zero." if ((b & 0x7f) == 0) // Note: -1 will pass - { - throw new InvalidOperationException("corrupted stream - invalid high tag number found"); - } + throw new IOException("corrupted stream - invalid high tag number found"); - while ((b >= 0) && ((b & 0x80) != 0)) + while ((b & 0x80) != 0) { - tagNo |= (b & 0x7f); - tagNo <<= 7; - b = input[index++] & 0xff; + b = input[index++]; } - - tagNo |= (b & 0x7f); } - byte[] tmp = new byte[input.Length - index + 1]; - - Array.Copy(input, index, tmp, 1, tmp.Length - 1); - - tmp[0] = (byte)newTag; - + int remaining = input.Length - index; + byte[] tmp = new byte[1 + remaining]; + tmp[0] = (byte)newTag; + Array.Copy(input, index, tmp, 1, remaining); return tmp; } } |