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Diffstat (limited to 'src/libs/3rdparty/botan/src/lib/asn1/der_enc.h')
| -rw-r--r-- | src/libs/3rdparty/botan/src/lib/asn1/der_enc.h | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/src/libs/3rdparty/botan/src/lib/asn1/der_enc.h b/src/libs/3rdparty/botan/src/lib/asn1/der_enc.h new file mode 100644 index 0000000000..135a70d074 --- /dev/null +++ b/src/libs/3rdparty/botan/src/lib/asn1/der_enc.h @@ -0,0 +1,221 @@ +/* +* DER Encoder +* (C) 1999-2007,2018 Jack Lloyd +* +* Botan is released under the Simplified BSD License (see license.txt) +*/ + +#ifndef BOTAN_DER_ENCODER_H_ +#define BOTAN_DER_ENCODER_H_ + +#include <botan/asn1_obj.h> +#include <vector> +#include <functional> + +namespace Botan { + +class BigInt; +class ASN1_Object; + +/** +* General DER Encoding Object +*/ +class BOTAN_PUBLIC_API(2,0) DER_Encoder final + { + public: + typedef std::function<void (const uint8_t[], size_t)> append_fn; + + /** + * DER encode, writing to an internal buffer + * Use get_contents or get_contents_unlocked to read the results + * after all encoding is completed. + */ + DER_Encoder() = default; + + /** + * DER encode, writing to @param vec + * If this constructor is used, get_contents* may not be called. + */ + DER_Encoder(secure_vector<uint8_t>& vec); + + /** + * DER encode, writing to @param vec + * If this constructor is used, get_contents* may not be called. + */ + DER_Encoder(std::vector<uint8_t>& vec); + + /** + * DER encode, calling append to write output + * If this constructor is used, get_contents* may not be called. + */ + DER_Encoder(append_fn append) : m_append_output(append) {} + + secure_vector<uint8_t> get_contents(); + + std::vector<uint8_t> get_contents_unlocked(); + + DER_Encoder& start_cons(ASN1_Tag type_tag, + ASN1_Tag class_tag = UNIVERSAL); + DER_Encoder& end_cons(); + + DER_Encoder& start_explicit(uint16_t type_tag); + DER_Encoder& end_explicit(); + + /** + * Insert raw bytes directly into the output stream + */ + DER_Encoder& raw_bytes(const uint8_t val[], size_t len); + + template<typename Alloc> + DER_Encoder& raw_bytes(const std::vector<uint8_t, Alloc>& val) + { + return raw_bytes(val.data(), val.size()); + } + + DER_Encoder& encode_null(); + DER_Encoder& encode(bool b); + DER_Encoder& encode(size_t s); + DER_Encoder& encode(const BigInt& n); + DER_Encoder& encode(const uint8_t val[], size_t len, ASN1_Tag real_type); + + template<typename Alloc> + DER_Encoder& encode(const std::vector<uint8_t, Alloc>& vec, ASN1_Tag real_type) + { + return encode(vec.data(), vec.size(), real_type); + } + + DER_Encoder& encode(bool b, + ASN1_Tag type_tag, + ASN1_Tag class_tag = CONTEXT_SPECIFIC); + + DER_Encoder& encode(size_t s, + ASN1_Tag type_tag, + ASN1_Tag class_tag = CONTEXT_SPECIFIC); + + DER_Encoder& encode(const BigInt& n, + ASN1_Tag type_tag, + ASN1_Tag class_tag = CONTEXT_SPECIFIC); + + DER_Encoder& encode(const uint8_t v[], size_t len, + ASN1_Tag real_type, + ASN1_Tag type_tag, + ASN1_Tag class_tag = CONTEXT_SPECIFIC); + + template<typename Alloc> + DER_Encoder& encode(const std::vector<uint8_t, Alloc>& bytes, + ASN1_Tag real_type, + ASN1_Tag type_tag, ASN1_Tag class_tag) + { + return encode(bytes.data(), bytes.size(), + real_type, type_tag, class_tag); + } + + template<typename T> + DER_Encoder& encode_optional(const T& value, const T& default_value) + { + if(value != default_value) + encode(value); + return (*this); + } + + template<typename T> + DER_Encoder& encode_list(const std::vector<T>& values) + { + for(size_t i = 0; i != values.size(); ++i) + encode(values[i]); + return (*this); + } + + /* + * Request for an object to encode itself to this stream + */ + DER_Encoder& encode(const ASN1_Object& obj); + + /* + * Conditionally write some values to the stream + */ + DER_Encoder& encode_if(bool pred, DER_Encoder& enc) + { + if(pred) + return raw_bytes(enc.get_contents()); + return (*this); + } + + DER_Encoder& encode_if(bool pred, const ASN1_Object& obj) + { + if(pred) + encode(obj); + return (*this); + } + + DER_Encoder& add_object(ASN1_Tag type_tag, ASN1_Tag class_tag, + const uint8_t rep[], size_t length); + + DER_Encoder& add_object(ASN1_Tag type_tag, ASN1_Tag class_tag, + const std::vector<uint8_t>& rep) + { + return add_object(type_tag, class_tag, rep.data(), rep.size()); + } + + DER_Encoder& add_object(ASN1_Tag type_tag, ASN1_Tag class_tag, + const secure_vector<uint8_t>& rep) + { + return add_object(type_tag, class_tag, rep.data(), rep.size()); + } + + DER_Encoder& add_object(ASN1_Tag type_tag, ASN1_Tag class_tag, + const std::string& str); + + DER_Encoder& add_object(ASN1_Tag type_tag, ASN1_Tag class_tag, + uint8_t val); + + private: + class DER_Sequence final + { + public: + ASN1_Tag tag_of() const; + + void push_contents(DER_Encoder& der); + + void add_bytes(const uint8_t val[], size_t len); + + void add_bytes(const uint8_t hdr[], size_t hdr_len, + const uint8_t val[], size_t val_len); + + DER_Sequence(ASN1_Tag, ASN1_Tag); + + DER_Sequence(DER_Sequence&& seq) + { + std::swap(m_type_tag, seq.m_type_tag); + std::swap(m_class_tag, seq.m_class_tag); + std::swap(m_contents, seq.m_contents); + std::swap(m_set_contents, seq.m_set_contents); + } + + DER_Sequence& operator=(DER_Sequence&& seq) + { + std::swap(m_type_tag, seq.m_type_tag); + std::swap(m_class_tag, seq.m_class_tag); + std::swap(m_contents, seq.m_contents); + std::swap(m_set_contents, seq.m_set_contents); + return (*this); + } + + DER_Sequence(const DER_Sequence& seq) = default; + + DER_Sequence& operator=(const DER_Sequence& seq) = default; + + private: + ASN1_Tag m_type_tag, m_class_tag; + secure_vector<uint8_t> m_contents; + std::vector< secure_vector<uint8_t> > m_set_contents; + }; + + append_fn m_append_output; + secure_vector<uint8_t> m_default_outbuf; + std::vector<DER_Sequence> m_subsequences; + }; + +} + +#endif |