5079590438

Committed 25 May 2023 12:28PM UTC coverage: 92.228% (+0.5%) from 91.723%

Build # 5079590438

Build Type

Pull #3502

github

Pull Request Pull Request #3502: Apply clang-format to the codebase

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94.29

/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);
}

}

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);

}

#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) { return (luhn_checksum(cc_number) == 0); }	17✔
42
43	uint64_t cc_rank(uint64_t cc_number) {	2✔
44	// Remove Luhn checksum
45	return cc_number / 10;	2✔
46	}
47
48	uint64_t cc_derank(uint64_t cc_number) {	2✔
49	for(size_t i = 0; i != 10; ++i) {	17✔
50	if(luhn_check(cc_number * 10 + i)) {	34✔
51	return (cc_number * 10 + i);	2✔
52	}
53	}
54
55	return 0;
56	}
57
58	uint64_t encrypt_cc_number(uint64_t cc_number, const Botan::SymmetricKey& key, const std::vector<uint8_t>& tweak) {	1✔
59	const Botan::BigInt n = 1000000000000000;	1✔
60
61	const uint64_t cc_ranked = cc_rank(cc_number);	1✔
62
63	const Botan::BigInt c = Botan::FPE::fe1_encrypt(n, cc_ranked, key, tweak);	1✔
64
65	if(c.bits() > 50) {	1✔
66	throw Botan::Internal_Error("FPE produced a number too large");	×
67	}
68
69	uint64_t enc_cc = 0;
70	for(size_t i = 0; i != 7; ++i) {	8✔
71	enc_cc = (enc_cc << 8) \| c.byte_at(6 - i);	7✔
72	}
73	return cc_derank(enc_cc);	1✔
74	}	2✔
75
76	uint64_t decrypt_cc_number(uint64_t enc_cc, const Botan::SymmetricKey& key, const std::vector<uint8_t>& tweak) {	1✔
77	const Botan::BigInt n = 1000000000000000;	1✔
78
79	const uint64_t cc_ranked = cc_rank(enc_cc);	1✔
80
81	const Botan::BigInt c = Botan::FPE::fe1_decrypt(n, cc_ranked, key, tweak);	1✔
82
83	if(c.bits() > 50) {	1✔
84	throw CLI_Error("FPE produced a number too large");	×
85	}
86
87	uint64_t dec_cc = 0;
88	for(size_t i = 0; i != 7; ++i) {	8✔
89	dec_cc = (dec_cc << 8) \| c.byte_at(6 - i);	7✔
90	}
91	return cc_derank(dec_cc);	1✔
92	}	2✔
93
94	}
95
96	class CC_Encrypt final : public Command {
97	public:
98	CC_Encrypt() : Command("cc_encrypt CC passphrase --tweak=") {}	4✔
99
100	std::string group() const override { return "misc"; }	1✔
101
102	std::string description() const override {	1✔
103	return "Encrypt the passed valid credit card number using FPE encryption";	1✔
104	}
105
106	void go() override {	1✔
107	const uint64_t cc_number = std::stoull(get_arg("CC"));	3✔
108	const std::vector<uint8_t> tweak = Botan::hex_decode(get_arg("tweak"));	2✔
109	const std::string pass = get_arg("passphrase");	1✔
110
111	auto pbkdf = Botan::PBKDF::create("PBKDF2(SHA-256)");	1✔
112	if(!pbkdf) {	1✔
113	throw CLI_Error_Unsupported("PBKDF", "PBKDF2(SHA-256)");	×
114	}
115
116	auto key = Botan::SymmetricKey(pbkdf->pbkdf_iterations(32, pass, tweak.data(), tweak.size(), 100000));	1✔
117
118	output() << encrypt_cc_number(cc_number, key, tweak) << "\n";	1✔
119	}	3✔
120	};
121
122	BOTAN_REGISTER_COMMAND("cc_encrypt", CC_Encrypt);	2✔
123
124	class CC_Decrypt final : public Command {
125	public:
126	CC_Decrypt() : Command("cc_decrypt CC passphrase --tweak=") {}	4✔
127
128	std::string group() const override { return "misc"; }	1✔
129
130	std::string description() const override {	1✔
131	return "Decrypt the passed valid ciphertext credit card number using FPE decryption";	1✔
132	}
133
134	void go() override {	1✔
135	const uint64_t cc_number = std::stoull(get_arg("CC"));	3✔
136	const std::vector<uint8_t> tweak = Botan::hex_decode(get_arg("tweak"));	2✔
137	const std::string pass = get_arg("passphrase");	1✔
138
139	auto pbkdf = Botan::PBKDF::create("PBKDF2(SHA-256)");	1✔
140	if(!pbkdf) {	1✔
141	throw CLI_Error_Unsupported("PBKDF", "PBKDF2(SHA-256)");	×
142	}
143
144	auto key = Botan::SymmetricKey(pbkdf->pbkdf_iterations(32, pass, tweak.data(), tweak.size(), 100000));	1✔
145
146	output() << decrypt_cc_number(cc_number, key, tweak) << "\n";	1✔
147	}	3✔
148	};
149
150	BOTAN_REGISTER_COMMAND("cc_decrypt", CC_Decrypt);	2✔
151
152	}
153
154	#endif // FPE && PBKDF

randombit / botan / 5079590438

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