5111374265

Committed 29 May 2023 11:19AM UTC coverage: 92.227% (+0.5%) from 91.723%

Build # 5111374265

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push

github

Committed by

randombit

Commit Message

Next release will be 3.1.0. Update release notes

Run Details

75588 of 81959 relevant lines covered (92.23%)

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96.23

/src/lib/asn1/pss_params.cpp

/*
* (C) 2017 Daniel Neus
*     2023 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/

#include <botan/internal/pss_params.h>

#include <botan/ber_dec.h>
#include <botan/der_enc.h>
#include <botan/internal/fmt.h>
#include <botan/internal/scan_name.h>

namespace Botan {

//static
PSS_Params PSS_Params::from_emsa_name(std::string_view emsa_name) {
   SCAN_Name scanner(emsa_name);

   if((scanner.algo_name() != "EMSA4" && scanner.algo_name() != "PSSR") || scanner.arg_count() != 3) {
      throw Invalid_Argument(fmt("PSS_Params::from_emsa_name unexpected param '{}'", emsa_name));
   }

   const std::string hash_fn = scanner.arg(0);
   BOTAN_ASSERT_NOMSG(scanner.arg(1) == "MGF1");
   const size_t salt_len = scanner.arg_as_integer(2);
   return PSS_Params(hash_fn, salt_len);
}

PSS_Params::PSS_Params(std::string_view hash_fn, size_t salt_len) :
      m_hash(hash_fn, AlgorithmIdentifier::USE_NULL_PARAM),
      m_mgf("MGF1", m_hash.BER_encode()),
      m_mgf_hash(m_hash),
      m_salt_len(salt_len) {}

PSS_Params::PSS_Params(const uint8_t der[], size_t der_len) {
   BER_Decoder decoder(der, der_len);
   this->decode_from(decoder);
}

std::vector<uint8_t> PSS_Params::serialize() const {
   std::vector<uint8_t> output;
   DER_Encoder(output).encode(*this);
   return output;
}

void PSS_Params::encode_into(DER_Encoder& to) const {
   const size_t trailer_field = 1;

   to.start_sequence()
      .start_context_specific(0)
      .encode(m_hash)
      .end_cons()
      .start_context_specific(1)
      .encode(m_mgf)
      .end_cons()
      .start_context_specific(2)
      .encode(m_salt_len)
      .end_cons()
      .start_context_specific(3)
      .encode(trailer_field)
      .end_cons()
      .end_cons();
}

void PSS_Params::decode_from(BER_Decoder& from) {
   const AlgorithmIdentifier default_hash("SHA-1", AlgorithmIdentifier::USE_NULL_PARAM);
   const AlgorithmIdentifier default_mgf("MGF1", default_hash.BER_encode());
   const size_t default_salt_len = 20;
   const size_t default_trailer = 1;

   from.start_sequence()
      .decode_optional(m_hash, ASN1_Type(0), ASN1_Class::ExplicitContextSpecific, default_hash)
      .decode_optional(m_mgf, ASN1_Type(1), ASN1_Class::ExplicitContextSpecific, default_mgf)
      .decode_optional(m_salt_len, ASN1_Type(2), ASN1_Class::ExplicitContextSpecific, default_salt_len)
      .decode_optional(m_trailer_field, ASN1_Type(3), ASN1_Class::ExplicitContextSpecific, default_trailer)
      .end_cons();

   BER_Decoder(m_mgf.parameters()).decode(m_mgf_hash);
}

}  // namespace Botan

1	/*
2	* (C) 2017 Daniel Neus
3	* 2023 Jack Lloyd
4	*
5	* Botan is released under the Simplified BSD License (see license.txt)
6	*/
7
8	#include <botan/internal/pss_params.h>
9
10	#include <botan/ber_dec.h>
11	#include <botan/der_enc.h>
12	#include <botan/internal/fmt.h>
13	#include <botan/internal/scan_name.h>
14
15	namespace Botan {
16
17	//static
18	PSS_Params PSS_Params::from_emsa_name(std::string_view emsa_name) {	21✔
19	SCAN_Name scanner(emsa_name);	21✔
20
21	if((scanner.algo_name() != "EMSA4" && scanner.algo_name() != "PSSR") \|\| scanner.arg_count() != 3) {	42✔
22	throw Invalid_Argument(fmt("PSS_Params::from_emsa_name unexpected param '{}'", emsa_name));	×
23	}
24
25	const std::string hash_fn = scanner.arg(0);	21✔
26	BOTAN_ASSERT_NOMSG(scanner.arg(1) == "MGF1");	21✔
27	const size_t salt_len = scanner.arg_as_integer(2);	21✔
28	return PSS_Params(hash_fn, salt_len);	42✔
29	}	21✔
30
31	PSS_Params::PSS_Params(std::string_view hash_fn, size_t salt_len) :	3,197✔
32	m_hash(hash_fn, AlgorithmIdentifier::USE_NULL_PARAM),	3,197✔
33	m_mgf("MGF1", m_hash.BER_encode()),	3,197✔
34	m_mgf_hash(m_hash),	3,197✔
35	m_salt_len(salt_len) {}	6,394✔
36
37	PSS_Params::PSS_Params(const uint8_t der[], size_t der_len) {	534✔
38	BER_Decoder decoder(der, der_len);	534✔
39	this->decode_from(decoder);	534✔
40	}	534✔
41
42	std::vector<uint8_t> PSS_Params::serialize() const {	3,197✔
43	std::vector<uint8_t> output;	3,197✔
44	DER_Encoder(output).encode(*this);	3,197✔
45	return output;	3,197✔
46	}	×
47
48	void PSS_Params::encode_into(DER_Encoder& to) const {	3,197✔
49	const size_t trailer_field = 1;	3,197✔
50
51	to.start_sequence()	3,197✔
52	.start_context_specific(0)	3,197✔
53	.encode(m_hash)	3,197✔
54	.end_cons()	3,197✔
55	.start_context_specific(1)	3,197✔
56	.encode(m_mgf)	3,197✔
57	.end_cons()	3,197✔
58	.start_context_specific(2)	3,197✔
59	.encode(m_salt_len)	3,197✔
60	.end_cons()	3,197✔
61	.start_context_specific(3)	3,197✔
62	.encode(trailer_field)	3,197✔
63	.end_cons()	3,197✔
64	.end_cons();	3,197✔
65	}	3,197✔
66
67	void PSS_Params::decode_from(BER_Decoder& from) {	534✔
68	const AlgorithmIdentifier default_hash("SHA-1", AlgorithmIdentifier::USE_NULL_PARAM);	534✔
69	const AlgorithmIdentifier default_mgf("MGF1", default_hash.BER_encode());	534✔
70	const size_t default_salt_len = 20;	534✔
71	const size_t default_trailer = 1;	534✔
72
73	from.start_sequence()	1,068✔
74	.decode_optional(m_hash, ASN1_Type(0), ASN1_Class::ExplicitContextSpecific, default_hash)	534✔
75	.decode_optional(m_mgf, ASN1_Type(1), ASN1_Class::ExplicitContextSpecific, default_mgf)	534✔
76	.decode_optional(m_salt_len, ASN1_Type(2), ASN1_Class::ExplicitContextSpecific, default_salt_len)	534✔
77	.decode_optional(m_trailer_field, ASN1_Type(3), ASN1_Class::ExplicitContextSpecific, default_trailer)	534✔
78	.end_cons();	534✔
79
80	BER_Decoder(m_mgf.parameters()).decode(m_mgf_hash);	534✔
81	}	534✔
82
83	} // namespace Botan

randombit / botan / 5111374265

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