5230455705

Committed 10 Jun 2023 02:30PM UTC coverage: 91.715% (-0.03%) from 91.746%

Build # 5230455705

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push

github

Committed by

randombit

Commit Message

Merge GH #3584 Change clang-format AllowShortFunctionsOnASingleLine config from All to Inline

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94.37

/src/cli/cc_enc.cpp

/*
* (C) 2014,2015 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/

#include "cli.h"
#include <botan/hex.h>

#if defined(BOTAN_HAS_FPE_FE1) && defined(BOTAN_HAS_PBKDF)

   #include <botan/fpe_fe1.h>
   #include <botan/pbkdf.h>

namespace Botan_CLI {

namespace {

uint8_t luhn_checksum(uint64_t cc_number) {
   uint8_t sum = 0;

   bool alt = false;
   while(cc_number) {
      uint8_t digit = cc_number % 10;
      if(alt) {
         digit *= 2;
         if(digit > 9) {
            digit -= 9;
         }
      }

      sum += digit;

      cc_number /= 10;
      alt = !alt;
   }

   return (sum % 10);
}

bool luhn_check(uint64_t cc_number) {
   return (luhn_checksum(cc_number) == 0);
}

uint64_t cc_rank(uint64_t cc_number) {
   // Remove Luhn checksum
   return cc_number / 10;
}

uint64_t cc_derank(uint64_t cc_number) {
   for(size_t i = 0; i != 10; ++i) {
      if(luhn_check(cc_number * 10 + i)) {
         return (cc_number * 10 + i);
      }
   }

   return 0;
}

uint64_t encrypt_cc_number(uint64_t cc_number, const Botan::SymmetricKey& key, const std::vector<uint8_t>& tweak) {
   const Botan::BigInt n = 1000000000000000;

   const uint64_t cc_ranked = cc_rank(cc_number);

   const Botan::BigInt c = Botan::FPE::fe1_encrypt(n, cc_ranked, key, tweak);

   if(c.bits() > 50) {
      throw Botan::Internal_Error("FPE produced a number too large");
   }

   uint64_t enc_cc = 0;
   for(size_t i = 0; i != 7; ++i) {
      enc_cc = (enc_cc << 8) | c.byte_at(6 - i);
   }
   return cc_derank(enc_cc);
}

uint64_t decrypt_cc_number(uint64_t enc_cc, const Botan::SymmetricKey& key, const std::vector<uint8_t>& tweak) {
   const Botan::BigInt n = 1000000000000000;

   const uint64_t cc_ranked = cc_rank(enc_cc);

   const Botan::BigInt c = Botan::FPE::fe1_decrypt(n, cc_ranked, key, tweak);

   if(c.bits() > 50) {
      throw CLI_Error("FPE produced a number too large");
   }

   uint64_t dec_cc = 0;
   for(size_t i = 0; i != 7; ++i) {
      dec_cc = (dec_cc << 8) | c.byte_at(6 - i);
   }
   return cc_derank(dec_cc);
}

}  // namespace

class CC_Encrypt final : public Command {
   public:
      CC_Encrypt() : Command("cc_encrypt CC passphrase --tweak=") {}

      std::string group() const override { return "misc"; }

      std::string description() const override {
         return "Encrypt the passed valid credit card number using FPE encryption";
      }

      void go() override {
         const uint64_t cc_number = std::stoull(get_arg("CC"));
         const std::vector<uint8_t> tweak = Botan::hex_decode(get_arg("tweak"));
         const std::string pass = get_arg("passphrase");

         auto pbkdf = Botan::PBKDF::create("PBKDF2(SHA-256)");
         if(!pbkdf) {
            throw CLI_Error_Unsupported("PBKDF", "PBKDF2(SHA-256)");
         }

         auto key = Botan::SymmetricKey(pbkdf->pbkdf_iterations(32, pass, tweak.data(), tweak.size(), 100000));

         output() << encrypt_cc_number(cc_number, key, tweak) << "\n";
      }
};

BOTAN_REGISTER_COMMAND("cc_encrypt", CC_Encrypt);

class CC_Decrypt final : public Command {
   public:
      CC_Decrypt() : Command("cc_decrypt CC passphrase --tweak=") {}

      std::string group() const override { return "misc"; }

      std::string description() const override {
         return "Decrypt the passed valid ciphertext credit card number using FPE decryption";
      }

      void go() override {
         const uint64_t cc_number = std::stoull(get_arg("CC"));
         const std::vector<uint8_t> tweak = Botan::hex_decode(get_arg("tweak"));
         const std::string pass = get_arg("passphrase");

         auto pbkdf = Botan::PBKDF::create("PBKDF2(SHA-256)");
         if(!pbkdf) {
            throw CLI_Error_Unsupported("PBKDF", "PBKDF2(SHA-256)");
         }

         auto key = Botan::SymmetricKey(pbkdf->pbkdf_iterations(32, pass, tweak.data(), tweak.size(), 100000));

         output() << decrypt_cc_number(cc_number, key, tweak) << "\n";
      }
};

BOTAN_REGISTER_COMMAND("cc_decrypt", CC_Decrypt);

}  // namespace Botan_CLI

#endif  // FPE && PBKDF

1	/*
2	* (C) 2014,2015 Jack Lloyd
3	*
4	* Botan is released under the Simplified BSD License (see license.txt)
5	*/
6
7	#include "cli.h"
8	#include <botan/hex.h>
9
10	#if defined(BOTAN_HAS_FPE_FE1) && defined(BOTAN_HAS_PBKDF)
11
12	#include <botan/fpe_fe1.h>
13	#include <botan/pbkdf.h>
14
15	namespace Botan_CLI {
16
17	namespace {
18
19	uint8_t luhn_checksum(uint64_t cc_number) {	17✔
20	uint8_t sum = 0;	17✔
21
22	bool alt = false;	17✔
23	while(cc_number) {	289✔
24	uint8_t digit = cc_number % 10;	272✔
25	if(alt) {	272✔
26	digit *= 2;	136✔
27	if(digit > 9) {	136✔
28	digit -= 9;	60✔
29	}
30	}
31
32	sum += digit;	272✔
33
34	cc_number /= 10;	272✔
35	alt = !alt;	272✔
36	}
37
38	return (sum % 10);	17✔
39	}
40
41	bool luhn_check(uint64_t cc_number) {	17✔
42	return (luhn_checksum(cc_number) == 0);	17✔
43	}
44
45	uint64_t cc_rank(uint64_t cc_number) {	2✔
46	// Remove Luhn checksum
47	return cc_number / 10;	2✔
48	}
49
50	uint64_t cc_derank(uint64_t cc_number) {	2✔
51	for(size_t i = 0; i != 10; ++i) {	17✔
52	if(luhn_check(cc_number * 10 + i)) {	34✔
53	return (cc_number * 10 + i);	2✔
54	}
55	}
56
57	return 0;
58	}
59
60	uint64_t encrypt_cc_number(uint64_t cc_number, const Botan::SymmetricKey& key, const std::vector<uint8_t>& tweak) {	1✔
61	const Botan::BigInt n = 1000000000000000;	1✔
62
63	const uint64_t cc_ranked = cc_rank(cc_number);	1✔
64
65	const Botan::BigInt c = Botan::FPE::fe1_encrypt(n, cc_ranked, key, tweak);	1✔
66
67	if(c.bits() > 50) {	1✔
68	throw Botan::Internal_Error("FPE produced a number too large");	×
69	}
70
71	uint64_t enc_cc = 0;
72	for(size_t i = 0; i != 7; ++i) {	8✔
73	enc_cc = (enc_cc << 8) \| c.byte_at(6 - i);	7✔
74	}
75	return cc_derank(enc_cc);	1✔
76	}	2✔
77
78	uint64_t decrypt_cc_number(uint64_t enc_cc, const Botan::SymmetricKey& key, const std::vector<uint8_t>& tweak) {	1✔
79	const Botan::BigInt n = 1000000000000000;	1✔
80
81	const uint64_t cc_ranked = cc_rank(enc_cc);	1✔
82
83	const Botan::BigInt c = Botan::FPE::fe1_decrypt(n, cc_ranked, key, tweak);	1✔
84
85	if(c.bits() > 50) {	1✔
86	throw CLI_Error("FPE produced a number too large");	×
87	}
88
89	uint64_t dec_cc = 0;
90	for(size_t i = 0; i != 7; ++i) {	8✔
91	dec_cc = (dec_cc << 8) \| c.byte_at(6 - i);	7✔
92	}
93	return cc_derank(dec_cc);	1✔
94	}	2✔
95
96	} // namespace
97
98	class CC_Encrypt final : public Command {
99	public:
100	CC_Encrypt() : Command("cc_encrypt CC passphrase --tweak=") {}	4✔
101
102	std::string group() const override { return "misc"; }	1✔
103
104	std::string description() const override {	1✔
105	return "Encrypt the passed valid credit card number using FPE encryption";	1✔
106	}
107
108	void go() override {	1✔
109	const uint64_t cc_number = std::stoull(get_arg("CC"));	3✔
110	const std::vector<uint8_t> tweak = Botan::hex_decode(get_arg("tweak"));	2✔
111	const std::string pass = get_arg("passphrase");	1✔
112
113	auto pbkdf = Botan::PBKDF::create("PBKDF2(SHA-256)");	1✔
114	if(!pbkdf) {	1✔
115	throw CLI_Error_Unsupported("PBKDF", "PBKDF2(SHA-256)");	×
116	}
117
118	auto key = Botan::SymmetricKey(pbkdf->pbkdf_iterations(32, pass, tweak.data(), tweak.size(), 100000));	1✔
119
120	output() << encrypt_cc_number(cc_number, key, tweak) << "\n";	1✔
121	}	3✔
122	};
123
124	BOTAN_REGISTER_COMMAND("cc_encrypt", CC_Encrypt);	2✔
125
126	class CC_Decrypt final : public Command {
127	public:
128	CC_Decrypt() : Command("cc_decrypt CC passphrase --tweak=") {}	4✔
129
130	std::string group() const override { return "misc"; }	1✔
131
132	std::string description() const override {	1✔
133	return "Decrypt the passed valid ciphertext credit card number using FPE decryption";	1✔
134	}
135
136	void go() override {	1✔
137	const uint64_t cc_number = std::stoull(get_arg("CC"));	3✔
138	const std::vector<uint8_t> tweak = Botan::hex_decode(get_arg("tweak"));	2✔
139	const std::string pass = get_arg("passphrase");	1✔
140
141	auto pbkdf = Botan::PBKDF::create("PBKDF2(SHA-256)");	1✔
142	if(!pbkdf) {	1✔
143	throw CLI_Error_Unsupported("PBKDF", "PBKDF2(SHA-256)");	×
144	}
145
146	auto key = Botan::SymmetricKey(pbkdf->pbkdf_iterations(32, pass, tweak.data(), tweak.size(), 100000));	1✔
147
148	output() << decrypt_cc_number(cc_number, key, tweak) << "\n";	1✔
149	}	3✔
150	};
151
152	BOTAN_REGISTER_COMMAND("cc_decrypt", CC_Decrypt);	2✔
153
154	} // namespace Botan_CLI
155
156	#endif // FPE && PBKDF

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