16055899095

Committed 03 Jul 2025 04:34PM UTC coverage: 90.571% (-0.003%) from 90.574%

Build # 16055899095

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push

github

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web-flow

Commit Message

Merge pull request #4931 from randombit/jack/moar-tidy

Address various warnings from clang-tidy

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99050 of 109362 relevant lines covered (90.57%)

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94.2

/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>
   #include <botan/symkey.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 Botan::BigInt c = Botan::FPE::fe1_encrypt(n, Botan::BigInt::from_u64(cc_rank(cc_number)), 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 Botan::BigInt c = Botan::FPE::fe1_decrypt(n, Botan::BigInt::from_u64(cc_rank(enc_cc)), 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	#include <botan/symkey.h>
15
16	namespace Botan_CLI {
17
18	namespace {
19
20	uint8_t luhn_checksum(uint64_t cc_number) {	17✔
21	uint8_t sum = 0;	17✔
22
23	bool alt = false;	17✔
24	while(cc_number) {	289✔
25	uint8_t digit = cc_number % 10;	272✔
26	if(alt) {	272✔
27	digit *= 2;	136✔
28	if(digit > 9) {	136✔
29	digit -= 9;	60✔
30	}
31	}
32
33	sum += digit;	272✔
34
35	cc_number /= 10;	272✔
36	alt = !alt;	272✔
37	}
38
39	return (sum % 10);	17✔
40	}
41
42	bool luhn_check(uint64_t cc_number) {	17✔
43	return (luhn_checksum(cc_number) == 0);	17✔
44	}
45
46	uint64_t cc_rank(uint64_t cc_number) {	2✔
47	// Remove Luhn checksum
48	return cc_number / 10;	2✔
49	}
50
51	uint64_t cc_derank(uint64_t cc_number) {	2✔
52	for(size_t i = 0; i != 10; ++i) {	17✔
53	if(luhn_check(cc_number * 10 + i)) {	34✔
54	return (cc_number * 10 + i);	2✔
55	}
56	}
57
58	return 0;
59	}
60
61	uint64_t encrypt_cc_number(uint64_t cc_number, const Botan::SymmetricKey& key, const std::vector<uint8_t>& tweak) {	1✔
62	const Botan::BigInt n(1000000000000000);	1✔
63
64	const Botan::BigInt c = Botan::FPE::fe1_encrypt(n, Botan::BigInt::from_u64(cc_rank(cc_number)), key, tweak);	1✔
65
66	if(c.bits() > 50) {	1✔
67	throw Botan::Internal_Error("FPE produced a number too large");	×
68	}
69
70	uint64_t enc_cc = 0;
71	for(size_t i = 0; i != 7; ++i) {	8✔
72	enc_cc = (enc_cc << 8) \| c.byte_at(6 - i);	7✔
73	}
74	return cc_derank(enc_cc);	1✔
75	}	1✔
76
77	uint64_t decrypt_cc_number(uint64_t enc_cc, const Botan::SymmetricKey& key, const std::vector<uint8_t>& tweak) {	1✔
78	const Botan::BigInt n(1000000000000000);	1✔
79
80	const Botan::BigInt c = Botan::FPE::fe1_decrypt(n, Botan::BigInt::from_u64(cc_rank(enc_cc)), key, tweak);	1✔
81
82	if(c.bits() > 50) {	1✔
83	throw CLI_Error("FPE produced a number too large");	×
84	}
85
86	uint64_t dec_cc = 0;
87	for(size_t i = 0; i != 7; ++i) {	8✔
88	dec_cc = (dec_cc << 8) \| c.byte_at(6 - i);	7✔
89	}
90	return cc_derank(dec_cc);	1✔
91	}	1✔
92
93	} // namespace
94
95	class CC_Encrypt final : public Command {
96	public:
97	CC_Encrypt() : Command("cc_encrypt CC passphrase --tweak=") {}	4✔
98
99	std::string group() const override { return "misc"; }	1✔
100
101	std::string description() const override {	1✔
102	return "Encrypt the passed valid credit card number using FPE encryption";	1✔
103	}
104
105	void go() override {	1✔
106	const uint64_t cc_number = std::stoull(get_arg("CC"));	2✔
107	const std::vector<uint8_t> tweak = Botan::hex_decode(get_arg("tweak"));	2✔
108	const std::string pass = get_arg("passphrase");	1✔
109
110	auto pbkdf = Botan::PBKDF::create("PBKDF2(SHA-256)");	1✔
111	if(!pbkdf) {	1✔
112	throw CLI_Error_Unsupported("PBKDF", "PBKDF2(SHA-256)");	×
113	}
114
115	auto key = Botan::SymmetricKey(pbkdf->pbkdf_iterations(32, pass, tweak.data(), tweak.size(), 100000));	1✔
116
117	output() << encrypt_cc_number(cc_number, key, tweak) << "\n";	1✔
118	}	3✔
119	};
120
121	BOTAN_REGISTER_COMMAND("cc_encrypt", CC_Encrypt);	2✔
122
123	class CC_Decrypt final : public Command {
124	public:
125	CC_Decrypt() : Command("cc_decrypt CC passphrase --tweak=") {}	4✔
126
127	std::string group() const override { return "misc"; }	1✔
128
129	std::string description() const override {	1✔
130	return "Decrypt the passed valid ciphertext credit card number using FPE decryption";	1✔
131	}
132
133	void go() override {	1✔
134	const uint64_t cc_number = std::stoull(get_arg("CC"));	2✔
135	const std::vector<uint8_t> tweak = Botan::hex_decode(get_arg("tweak"));	2✔
136	const std::string pass = get_arg("passphrase");	1✔
137
138	auto pbkdf = Botan::PBKDF::create("PBKDF2(SHA-256)");	1✔
139	if(!pbkdf) {	1✔
140	throw CLI_Error_Unsupported("PBKDF", "PBKDF2(SHA-256)");	×
141	}
142
143	auto key = Botan::SymmetricKey(pbkdf->pbkdf_iterations(32, pass, tweak.data(), tweak.size(), 100000));	1✔
144
145	output() << decrypt_cc_number(cc_number, key, tweak) << "\n";	1✔
146	}	3✔
147	};
148
149	BOTAN_REGISTER_COMMAND("cc_decrypt", CC_Decrypt);	2✔
150
151	} // namespace Botan_CLI
152
153	#endif // FPE && PBKDF

randombit / botan / 16055899095

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