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author | Keith Isdale <keith.isdale@nokia.com> | 2010-07-26 14:56:53 +1000 |
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committer | Keith Isdale <keith.isdale@nokia.com> | 2010-07-26 14:56:53 +1000 |
commit | 9f034793bcfc51c2b7c1dd14db806f7258f9a9eb (patch) | |
tree | 63bd0f50ce5b77828ad8205eafd7b9412810499e /botan/src/pubkey/pubkey_enums.cpp | |
parent | 619d92cfef29e653bfdf852e83888e50cfc4348f (diff) | |
parent | 65271649dbc90f3af1184ad1b23bdb64c0c07d07 (diff) |
Merge branch 'master' of git://git-nokia.trolltech.com.au/qtsoftware/research/qtuitest
Diffstat (limited to 'botan/src/pubkey/pubkey_enums.cpp')
-rw-r--r-- | botan/src/pubkey/pubkey_enums.cpp | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/botan/src/pubkey/pubkey_enums.cpp b/botan/src/pubkey/pubkey_enums.cpp new file mode 100644 index 0000000..327107d --- /dev/null +++ b/botan/src/pubkey/pubkey_enums.cpp @@ -0,0 +1,42 @@ +/* +* KeyUsage +* (C) 1999-2007 Jack Lloyd +* +* Distributed under the terms of the Botan license +*/ + +#include <botan/pubkey_enums.h> +#include <botan/ber_dec.h> + +namespace Botan { + +namespace BER { + +/* +* Decode a BER encoded KeyUsage +*/ +void decode(BER_Decoder& source, Key_Constraints& key_usage) + { + BER_Object obj = source.get_next_object(); + + if(obj.type_tag != BIT_STRING || obj.class_tag != UNIVERSAL) + throw BER_Bad_Tag("Bad tag for usage constraint", + obj.type_tag, obj.class_tag); + if(obj.value.size() != 2 && obj.value.size() != 3) + throw BER_Decoding_Error("Bad size for BITSTRING in usage constraint"); + if(obj.value[0] >= 8) + throw BER_Decoding_Error("Invalid unused bits in usage constraint"); + + const byte mask = (0xFF << obj.value[0]); + obj.value[obj.value.size()-1] &= mask; + + u16bit usage = 0; + for(u32bit j = 1; j != obj.value.size(); ++j) + usage = (obj.value[j] << 8) | usage; + + key_usage = Key_Constraints(usage); + } + +} + +} |