diff options
Diffstat (limited to 'src/util/srp.cpp')
-rw-r--r-- | src/util/srp.cpp | 352 |
1 files changed, 200 insertions, 152 deletions
diff --git a/src/util/srp.cpp b/src/util/srp.cpp index f4d369d68..e7ccd5940 100644 --- a/src/util/srp.cpp +++ b/src/util/srp.cpp @@ -47,9 +47,9 @@ #include <config.h> #if USE_SYSTEM_GMP - #include <gmp.h> +#include <gmp.h> #else - #include <mini-gmp.h> +#include <mini-gmp.h> #endif #include <util/sha2.h> @@ -92,98 +92,100 @@ void srp_set_memory_functions( } // clang-format on -typedef struct { +typedef struct +{ mpz_t N; mpz_t g; } NGConstant; -struct NGHex { +struct NGHex +{ const char *n_hex; const char *g_hex; }; /* All constants here were pulled from Appendix A of RFC 5054 */ static struct NGHex global_Ng_constants[] = { - {/* 1024 */ - "EEAF0AB9ADB38DD69C33F80AFA8FC5E86072618775FF3C0B9EA2314C" - "9C256576D674DF7496EA81D3383B4813D692C6E0E0D5D8E250B98BE4" - "8E495C1D6089DAD15DC7D7B46154D6B6CE8EF4AD69B15D4982559B29" - "7BCF1885C529F566660E57EC68EDBC3C05726CC02FD4CBF4976EAA9A" - "FD5138FE8376435B9FC61D2FC0EB06E3", - "2"}, - {/* 2048 */ - "AC6BDB41324A9A9BF166DE5E1389582FAF72B6651987EE07FC319294" - "3DB56050A37329CBB4A099ED8193E0757767A13DD52312AB4B03310D" - "CD7F48A9DA04FD50E8083969EDB767B0CF6095179A163AB3661A05FB" - "D5FAAAE82918A9962F0B93B855F97993EC975EEAA80D740ADBF4FF74" - "7359D041D5C33EA71D281E446B14773BCA97B43A23FB801676BD207A" - "436C6481F1D2B9078717461A5B9D32E688F87748544523B524B0D57D" - "5EA77A2775D2ECFA032CFBDBF52FB3786160279004E57AE6AF874E73" - "03CE53299CCC041C7BC308D82A5698F3A8D0C38271AE35F8E9DBFBB6" - "94B5C803D89F7AE435DE236D525F54759B65E372FCD68EF20FA7111F" - "9E4AFF73", - "2"}, - {/* 4096 */ - "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E08" - "8A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B" - "302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9" - "A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE6" - "49286651ECE45B3DC2007CB8A163BF0598DA48361C55D39A69163FA8" - "FD24CF5F83655D23DCA3AD961C62F356208552BB9ED529077096966D" - "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3BE39E772C" - "180E86039B2783A2EC07A28FB5C55DF06F4C52C9DE2BCBF695581718" - "3995497CEA956AE515D2261898FA051015728E5A8AAAC42DAD33170D" - "04507A33A85521ABDF1CBA64ECFB850458DBEF0A8AEA71575D060C7D" - "B3970F85A6E1E4C7ABF5AE8CDB0933D71E8C94E04A25619DCEE3D226" - "1AD2EE6BF12FFA06D98A0864D87602733EC86A64521F2B18177B200C" - "BBE117577A615D6C770988C0BAD946E208E24FA074E5AB3143DB5BFC" - "E0FD108E4B82D120A92108011A723C12A787E6D788719A10BDBA5B26" - "99C327186AF4E23C1A946834B6150BDA2583E9CA2AD44CE8DBBBC2DB" - "04DE8EF92E8EFC141FBECAA6287C59474E6BC05D99B2964FA090C3A2" - "233BA186515BE7ED1F612970CEE2D7AFB81BDD762170481CD0069127" - "D5B05AA993B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934063199" - "FFFFFFFFFFFFFFFF", - "5"}, - {/* 8192 */ - "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E08" - "8A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B" - "302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9" - "A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE6" - "49286651ECE45B3DC2007CB8A163BF0598DA48361C55D39A69163FA8" - "FD24CF5F83655D23DCA3AD961C62F356208552BB9ED529077096966D" - "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3BE39E772C" - "180E86039B2783A2EC07A28FB5C55DF06F4C52C9DE2BCBF695581718" - "3995497CEA956AE515D2261898FA051015728E5A8AAAC42DAD33170D" - "04507A33A85521ABDF1CBA64ECFB850458DBEF0A8AEA71575D060C7D" - "B3970F85A6E1E4C7ABF5AE8CDB0933D71E8C94E04A25619DCEE3D226" - "1AD2EE6BF12FFA06D98A0864D87602733EC86A64521F2B18177B200C" - "BBE117577A615D6C770988C0BAD946E208E24FA074E5AB3143DB5BFC" - "E0FD108E4B82D120A92108011A723C12A787E6D788719A10BDBA5B26" - "99C327186AF4E23C1A946834B6150BDA2583E9CA2AD44CE8DBBBC2DB" - "04DE8EF92E8EFC141FBECAA6287C59474E6BC05D99B2964FA090C3A2" - "233BA186515BE7ED1F612970CEE2D7AFB81BDD762170481CD0069127" - "D5B05AA993B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934028492" - "36C3FAB4D27C7026C1D4DCB2602646DEC9751E763DBA37BDF8FF9406" - "AD9E530EE5DB382F413001AEB06A53ED9027D831179727B0865A8918" - "DA3EDBEBCF9B14ED44CE6CBACED4BB1BDB7F1447E6CC254B33205151" - "2BD7AF426FB8F401378CD2BF5983CA01C64B92ECF032EA15D1721D03" - "F482D7CE6E74FEF6D55E702F46980C82B5A84031900B1C9E59E7C97F" - "BEC7E8F323A97A7E36CC88BE0F1D45B7FF585AC54BD407B22B4154AA" - "CC8F6D7EBF48E1D814CC5ED20F8037E0A79715EEF29BE32806A1D58B" - "B7C5DA76F550AA3D8A1FBFF0EB19CCB1A313D55CDA56C9EC2EF29632" - "387FE8D76E3C0468043E8F663F4860EE12BF2D5B0B7474D6E694F91E" - "6DBE115974A3926F12FEE5E438777CB6A932DF8CD8BEC4D073B931BA" - "3BC832B68D9DD300741FA7BF8AFC47ED2576F6936BA424663AAB639C" - "5AE4F5683423B4742BF1C978238F16CBE39D652DE3FDB8BEFC848AD9" - "22222E04A4037C0713EB57A81A23F0C73473FC646CEA306B4BCBC886" - "2F8385DDFA9D4B7FA2C087E879683303ED5BDD3A062B3CF5B3A278A6" - "6D2A13F83F44F82DDF310EE074AB6A364597E899A0255DC164F31CC5" - "0846851DF9AB48195DED7EA1B1D510BD7EE74D73FAF36BC31ECFA268" - "359046F4EB879F924009438B481C6CD7889A002ED5EE382BC9190DA6" - "FC026E479558E4475677E9AA9E3050E2765694DFC81F56E880B96E71" - "60C980DD98EDD3DFFFFFFFFFFFFFFFFF", - "13"}, - {0, 0} /* null sentinel */ + {/* 1024 */ + "EEAF0AB9ADB38DD69C33F80AFA8FC5E86072618775FF3C0B9EA2314C" + "9C256576D674DF7496EA81D3383B4813D692C6E0E0D5D8E250B98BE4" + "8E495C1D6089DAD15DC7D7B46154D6B6CE8EF4AD69B15D4982559B29" + "7BCF1885C529F566660E57EC68EDBC3C05726CC02FD4CBF4976EAA9A" + "FD5138FE8376435B9FC61D2FC0EB06E3", + "2"}, + {/* 2048 */ + "AC6BDB41324A9A9BF166DE5E1389582FAF72B6651987EE07FC319294" + "3DB56050A37329CBB4A099ED8193E0757767A13DD52312AB4B03310D" + "CD7F48A9DA04FD50E8083969EDB767B0CF6095179A163AB3661A05FB" + "D5FAAAE82918A9962F0B93B855F97993EC975EEAA80D740ADBF4FF74" + "7359D041D5C33EA71D281E446B14773BCA97B43A23FB801676BD207A" + "436C6481F1D2B9078717461A5B9D32E688F87748544523B524B0D57D" + "5EA77A2775D2ECFA032CFBDBF52FB3786160279004E57AE6AF874E73" + "03CE53299CCC041C7BC308D82A5698F3A8D0C38271AE35F8E9DBFBB6" + "94B5C803D89F7AE435DE236D525F54759B65E372FCD68EF20FA7111F" + "9E4AFF73", + "2"}, + {/* 4096 */ + "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E08" + "8A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B" + "302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9" + "A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE6" + "49286651ECE45B3DC2007CB8A163BF0598DA48361C55D39A69163FA8" + "FD24CF5F83655D23DCA3AD961C62F356208552BB9ED529077096966D" + "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3BE39E772C" + "180E86039B2783A2EC07A28FB5C55DF06F4C52C9DE2BCBF695581718" + "3995497CEA956AE515D2261898FA051015728E5A8AAAC42DAD33170D" + "04507A33A85521ABDF1CBA64ECFB850458DBEF0A8AEA71575D060C7D" + "B3970F85A6E1E4C7ABF5AE8CDB0933D71E8C94E04A25619DCEE3D226" + "1AD2EE6BF12FFA06D98A0864D87602733EC86A64521F2B18177B200C" + "BBE117577A615D6C770988C0BAD946E208E24FA074E5AB3143DB5BFC" + "E0FD108E4B82D120A92108011A723C12A787E6D788719A10BDBA5B26" + "99C327186AF4E23C1A946834B6150BDA2583E9CA2AD44CE8DBBBC2DB" + "04DE8EF92E8EFC141FBECAA6287C59474E6BC05D99B2964FA090C3A2" + "233BA186515BE7ED1F612970CEE2D7AFB81BDD762170481CD0069127" + "D5B05AA993B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934063199" + "FFFFFFFFFFFFFFFF", + "5"}, + {/* 8192 */ + "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E08" + "8A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B" + "302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9" + "A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE6" + "49286651ECE45B3DC2007CB8A163BF0598DA48361C55D39A69163FA8" + "FD24CF5F83655D23DCA3AD961C62F356208552BB9ED529077096966D" + "670C354E4ABC9804F1746C08CA18217C32905E462E36CE3BE39E772C" + "180E86039B2783A2EC07A28FB5C55DF06F4C52C9DE2BCBF695581718" + "3995497CEA956AE515D2261898FA051015728E5A8AAAC42DAD33170D" + "04507A33A85521ABDF1CBA64ECFB850458DBEF0A8AEA71575D060C7D" + "B3970F85A6E1E4C7ABF5AE8CDB0933D71E8C94E04A25619DCEE3D226" + "1AD2EE6BF12FFA06D98A0864D87602733EC86A64521F2B18177B200C" + "BBE117577A615D6C770988C0BAD946E208E24FA074E5AB3143DB5BFC" + "E0FD108E4B82D120A92108011A723C12A787E6D788719A10BDBA5B26" + "99C327186AF4E23C1A946834B6150BDA2583E9CA2AD44CE8DBBBC2DB" + "04DE8EF92E8EFC141FBECAA6287C59474E6BC05D99B2964FA090C3A2" + "233BA186515BE7ED1F612970CEE2D7AFB81BDD762170481CD0069127" + "D5B05AA993B4EA988D8FDDC186FFB7DC90A6C08F4DF435C934028492" + "36C3FAB4D27C7026C1D4DCB2602646DEC9751E763DBA37BDF8FF9406" + "AD9E530EE5DB382F413001AEB06A53ED9027D831179727B0865A8918" + "DA3EDBEBCF9B14ED44CE6CBACED4BB1BDB7F1447E6CC254B33205151" + "2BD7AF426FB8F401378CD2BF5983CA01C64B92ECF032EA15D1721D03" + "F482D7CE6E74FEF6D55E702F46980C82B5A84031900B1C9E59E7C97F" + "BEC7E8F323A97A7E36CC88BE0F1D45B7FF585AC54BD407B22B4154AA" + "CC8F6D7EBF48E1D814CC5ED20F8037E0A79715EEF29BE32806A1D58B" + "B7C5DA76F550AA3D8A1FBFF0EB19CCB1A313D55CDA56C9EC2EF29632" + "387FE8D76E3C0468043E8F663F4860EE12BF2D5B0B7474D6E694F91E" + "6DBE115974A3926F12FEE5E438777CB6A932DF8CD8BEC4D073B931BA" + "3BC832B68D9DD300741FA7BF8AFC47ED2576F6936BA424663AAB639C" + "5AE4F5683423B4742BF1C978238F16CBE39D652DE3FDB8BEFC848AD9" + "22222E04A4037C0713EB57A81A23F0C73473FC646CEA306B4BCBC886" + "2F8385DDFA9D4B7FA2C087E879683303ED5BDD3A062B3CF5B3A278A6" + "6D2A13F83F44F82DDF310EE074AB6A364597E899A0255DC164F31CC5" + "0846851DF9AB48195DED7EA1B1D510BD7EE74D73FAF36BC31ECFA268" + "359046F4EB879F924009438B481C6CD7889A002ED5EE382BC9190DA6" + "FC026E479558E4475677E9AA9E3050E2765694DFC81F56E880B96E71" + "60C980DD98EDD3DFFFFFFFFFFFFFFFFF", + "13"}, + {0, 0} /* null sentinel */ }; static void delete_ng(NGConstant *ng) @@ -199,7 +201,8 @@ static NGConstant *new_ng(SRP_NGType ng_type, const char *n_hex, const char *g_h { NGConstant *ng = (NGConstant *)srp_alloc(sizeof(NGConstant)); - if (!ng) return 0; + if (!ng) + return 0; mpz_init(ng->N); mpz_init(ng->g); @@ -221,13 +224,15 @@ static NGConstant *new_ng(SRP_NGType ng_type, const char *n_hex, const char *g_h return ng; } -typedef union { +typedef union +{ SHA_CTX sha; SHA256_CTX sha256; // SHA512_CTX sha512; } HashCTX; -struct SRPVerifier { +struct SRPVerifier +{ SRP_HashAlgorithm hash_alg; NGConstant *ng; @@ -240,7 +245,8 @@ struct SRPVerifier { unsigned char session_key[SHA512_DIGEST_LENGTH]; }; -struct SRPUser { +struct SRPUser +{ SRP_HashAlgorithm hash_alg; NGConstant *ng; @@ -376,7 +382,7 @@ inline static void mpz_from_bin(const unsigned char *s, size_t len, mpz_t ret) // set op to (op1 * op2) mod d, using tmp for the calculation inline static void mpz_mulm( - mpz_t op, const mpz_t op1, const mpz_t op2, const mpz_t d, mpz_t tmp) + mpz_t op, const mpz_t op1, const mpz_t op2, const mpz_t d, mpz_t tmp) { mpz_mul(tmp, op1, op2); mpz_mod(op, tmp, d); @@ -384,7 +390,7 @@ inline static void mpz_mulm( // set op to (op1 + op2) mod d, using tmp for the calculation inline static void mpz_addm( - mpz_t op, const mpz_t op1, const mpz_t op2, const mpz_t d, mpz_t tmp) + mpz_t op, const mpz_t op1, const mpz_t op2, const mpz_t d, mpz_t tmp) { mpz_add(tmp, op1, op2); mpz_mod(op, tmp, d); @@ -392,14 +398,14 @@ inline static void mpz_addm( // set op to (op1 - op2) mod d, using tmp for the calculation inline static void mpz_subm( - mpz_t op, const mpz_t op1, const mpz_t op2, const mpz_t d, mpz_t tmp) + mpz_t op, const mpz_t op1, const mpz_t op2, const mpz_t d, mpz_t tmp) { mpz_sub(tmp, op1, op2); mpz_mod(op, tmp, d); } -static SRP_Result H_nn( - mpz_t result, SRP_HashAlgorithm alg, const mpz_t N, const mpz_t n1, const mpz_t n2) +static SRP_Result H_nn(mpz_t result, SRP_HashAlgorithm alg, const mpz_t N, const mpz_t n1, + const mpz_t n2) { unsigned char buff[SHA512_DIGEST_LENGTH]; size_t len_N = mpz_num_bytes(N); @@ -407,7 +413,8 @@ static SRP_Result H_nn( size_t len_n2 = mpz_num_bytes(n2); size_t nbytes = len_N + len_N; unsigned char *bin = (unsigned char *)srp_alloc(nbytes); - if (!bin) return SRP_ERR; + if (!bin) + return SRP_ERR; if (len_n1 > len_N || len_n2 > len_N) { srp_free(bin); return SRP_ERR; @@ -422,12 +429,13 @@ static SRP_Result H_nn( } static SRP_Result H_ns(mpz_t result, SRP_HashAlgorithm alg, const unsigned char *n, - size_t len_n, const unsigned char *bytes, uint32_t len_bytes) + size_t len_n, const unsigned char *bytes, uint32_t len_bytes) { unsigned char buff[SHA512_DIGEST_LENGTH]; size_t nbytes = len_n + len_bytes; unsigned char *bin = (unsigned char *)srp_alloc(nbytes); - if (!bin) return SRP_ERR; + if (!bin) + return SRP_ERR; memcpy(bin, n, len_n); memcpy(bin + len_n, bytes, len_bytes); hash(alg, bin, nbytes, buff); @@ -437,8 +445,8 @@ static SRP_Result H_ns(mpz_t result, SRP_HashAlgorithm alg, const unsigned char } static int calculate_x(mpz_t result, SRP_HashAlgorithm alg, const unsigned char *salt, - size_t salt_len, const char *username, const unsigned char *password, - size_t password_len) + size_t salt_len, const char *username, const unsigned char *password, + size_t password_len) { unsigned char ucp_hash[SHA512_DIGEST_LENGTH]; HashCTX ctx; @@ -459,7 +467,8 @@ static SRP_Result update_hash_n(SRP_HashAlgorithm alg, HashCTX *ctx, const mpz_t { size_t len = mpz_num_bytes(n); unsigned char *n_bytes = (unsigned char *)srp_alloc(len); - if (!n_bytes) return SRP_ERR; + if (!n_bytes) + return SRP_ERR; mpz_to_bin(n, n_bytes); hash_update(alg, ctx, n_bytes, len); srp_free(n_bytes); @@ -470,7 +479,8 @@ static SRP_Result hash_num(SRP_HashAlgorithm alg, const mpz_t n, unsigned char * { int nbytes = mpz_num_bytes(n); unsigned char *bin = (unsigned char *)srp_alloc(nbytes); - if (!bin) return SRP_ERR; + if (!bin) + return SRP_ERR; mpz_to_bin(n, bin); hash(alg, bin, nbytes, dest); srp_free(bin); @@ -478,8 +488,8 @@ static SRP_Result hash_num(SRP_HashAlgorithm alg, const mpz_t n, unsigned char * } static SRP_Result calculate_M(SRP_HashAlgorithm alg, NGConstant *ng, unsigned char *dest, - const char *I, const unsigned char *s_bytes, size_t s_len, const mpz_t A, - const mpz_t B, const unsigned char *K) + const char *I, const unsigned char *s_bytes, size_t s_len, const mpz_t A, + const mpz_t B, const unsigned char *K) { unsigned char H_N[SHA512_DIGEST_LENGTH]; unsigned char H_g[SHA512_DIGEST_LENGTH]; @@ -489,8 +499,10 @@ static SRP_Result calculate_M(SRP_HashAlgorithm alg, NGConstant *ng, unsigned ch size_t i = 0; size_t hash_len = hash_length(alg); - if (!hash_num(alg, ng->N, H_N)) return SRP_ERR; - if (!hash_num(alg, ng->g, H_g)) return SRP_ERR; + if (!hash_num(alg, ng->N, H_N)) + return SRP_ERR; + if (!hash_num(alg, ng->g, H_g)) + return SRP_ERR; hash(alg, (const unsigned char *)I, strlen(I), H_I); @@ -502,8 +514,10 @@ static SRP_Result calculate_M(SRP_HashAlgorithm alg, NGConstant *ng, unsigned ch hash_update(alg, &ctx, H_xor, hash_len); hash_update(alg, &ctx, H_I, hash_len); hash_update(alg, &ctx, s_bytes, s_len); - if (!update_hash_n(alg, &ctx, A)) return SRP_ERR; - if (!update_hash_n(alg, &ctx, B)) return SRP_ERR; + if (!update_hash_n(alg, &ctx, A)) + return SRP_ERR; + if (!update_hash_n(alg, &ctx, B)) + return SRP_ERR; hash_update(alg, &ctx, K, hash_len); hash_final(alg, &ctx, dest); @@ -511,13 +525,14 @@ static SRP_Result calculate_M(SRP_HashAlgorithm alg, NGConstant *ng, unsigned ch } static SRP_Result calculate_H_AMK(SRP_HashAlgorithm alg, unsigned char *dest, - const mpz_t A, const unsigned char *M, const unsigned char *K) + const mpz_t A, const unsigned char *M, const unsigned char *K) { HashCTX ctx; hash_init(alg, &ctx); - if (!update_hash_n(alg, &ctx, A)) return SRP_ERR; + if (!update_hash_n(alg, &ctx, A)) + return SRP_ERR; hash_update(alg, &ctx, M, hash_length(alg)); hash_update(alg, &ctx, K, hash_length(alg)); @@ -539,16 +554,23 @@ static SRP_Result fill_buff() if (!CryptAcquireContext(&wctx, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT)) return SRP_ERR; - if (!CryptGenRandom(wctx, sizeof(g_rand_buff), (BYTE *)g_rand_buff)) return SRP_ERR; - if (!CryptReleaseContext(wctx, 0)) return SRP_ERR; + if (!CryptGenRandom(wctx, sizeof(g_rand_buff), (BYTE *)g_rand_buff)) + return SRP_ERR; + if (!CryptReleaseContext(wctx, 0)) + return SRP_ERR; #else fp = fopen("/dev/urandom", "r"); - if (!fp) return SRP_ERR; + if (!fp) + return SRP_ERR; - if (fread(g_rand_buff, sizeof(g_rand_buff), 1, fp) != 1) { fclose(fp); return SRP_ERR; } - if (fclose(fp)) return SRP_ERR; + if (fread(g_rand_buff, sizeof(g_rand_buff), 1, fp) != 1) { + fclose(fp); + return SRP_ERR; + } + if (fclose(fp)) + return SRP_ERR; #endif return SRP_OK; } @@ -557,7 +579,8 @@ static SRP_Result mpz_fill_random(mpz_t num) { // was call: BN_rand(num, 256, -1, 0); if (RAND_BUFF_MAX - g_rand_idx < 32) - if (fill_buff() != SRP_OK) return SRP_ERR; + if (fill_buff() != SRP_OK) + return SRP_ERR; mpz_from_bin((const unsigned char *)(&g_rand_buff[g_rand_idx]), 32, num); g_rand_idx += 32; return SRP_OK; @@ -565,7 +588,8 @@ static SRP_Result mpz_fill_random(mpz_t num) static SRP_Result init_random() { - if (g_initialized) return SRP_OK; + if (g_initialized) + return SRP_OK; SRP_Result ret = fill_buff(); g_initialized = (ret == SRP_OK); return ret; @@ -604,7 +628,8 @@ SRP_Result srp_create_salted_verification_key( SRP_HashAlgorithm alg, NGConstant *ng = new_ng(ng_type, n_hex, g_hex); - if (!ng) goto error_and_exit; + if (!ng) + goto error_and_exit; if (init_random() != SRP_OK) /* Only happens once */ goto error_and_exit; @@ -613,15 +638,17 @@ SRP_Result srp_create_salted_verification_key( SRP_HashAlgorithm alg, size_t size_to_fill = 16; *len_s = size_to_fill; if (RAND_BUFF_MAX - g_rand_idx < size_to_fill) - if (fill_buff() != SRP_OK) goto error_and_exit; + if (fill_buff() != SRP_OK) + goto error_and_exit; *bytes_s = (unsigned char *)srp_alloc(size_to_fill); - if (!*bytes_s) goto error_and_exit; + if (!*bytes_s) + goto error_and_exit; memcpy(*bytes_s, &g_rand_buff[g_rand_idx], size_to_fill); g_rand_idx += size_to_fill; } - if (!calculate_x( - x, alg, *bytes_s, *len_s, username_for_verifier, password, len_password)) + if (!calculate_x(x, alg, *bytes_s, *len_s, username_for_verifier, password, + len_password)) goto error_and_exit; srp_dbg_num(x, "Server calculated x: "); @@ -632,7 +659,8 @@ SRP_Result srp_create_salted_verification_key( SRP_HashAlgorithm alg, *bytes_v = (unsigned char *)srp_alloc(*len_v); - if (!*bytes_v) goto error_and_exit; + if (!*bytes_v) + goto error_and_exit; mpz_to_bin(v, *bytes_v); @@ -679,11 +707,13 @@ struct SRPVerifier *srp_verifier_new(SRP_HashAlgorithm alg, *len_B = 0; *bytes_B = 0; - if (!ng) goto cleanup_and_exit; + if (!ng) + goto cleanup_and_exit; ver = (struct SRPVerifier *)srp_alloc(sizeof(struct SRPVerifier)); - if (!ver) goto cleanup_and_exit; + if (!ver) + goto cleanup_and_exit; if (init_random() != SRP_OK) { /* Only happens once */ srp_free(ver); @@ -711,17 +741,20 @@ struct SRPVerifier *srp_verifier_new(SRP_HashAlgorithm alg, if (bytes_b) { mpz_from_bin(bytes_b, len_b, b); } else { - if (!mpz_fill_random(b)) goto ver_cleanup_and_exit; + if (!mpz_fill_random(b)) + goto ver_cleanup_and_exit; } - if (!H_nn(k, alg, ng->N, ng->N, ng->g)) goto ver_cleanup_and_exit; + if (!H_nn(k, alg, ng->N, ng->N, ng->g)) + goto ver_cleanup_and_exit; /* B = kv + g^b */ mpz_mulm(tmp1, k, v, ng->N, tmp3); mpz_powm(tmp2, ng->g, b, ng->N); mpz_addm(B, tmp1, tmp2, ng->N, tmp3); - if (!H_nn(u, alg, ng->N, A, B)) goto ver_cleanup_and_exit; + if (!H_nn(u, alg, ng->N, A, B)) + goto ver_cleanup_and_exit; srp_dbg_num(u, "Server calculated u: "); @@ -730,10 +763,11 @@ struct SRPVerifier *srp_verifier_new(SRP_HashAlgorithm alg, mpz_mulm(tmp2, A, tmp1, ng->N, tmp3); mpz_powm(S, tmp2, b, ng->N); - if (!hash_num(alg, S, ver->session_key)) goto ver_cleanup_and_exit; + if (!hash_num(alg, S, ver->session_key)) + goto ver_cleanup_and_exit; - if (!calculate_M( - alg, ng, ver->M, username, bytes_s, len_s, A, B, ver->session_key)) { + if (!calculate_M(alg, ng, ver->M, username, bytes_s, len_s, A, B, + ver->session_key)) { goto ver_cleanup_and_exit; } if (!calculate_H_AMK(alg, ver->H_AMK, A, ver->M, ver->session_key)) { @@ -797,9 +831,10 @@ const char *srp_verifier_get_username(struct SRPVerifier *ver) } const unsigned char *srp_verifier_get_session_key( - struct SRPVerifier *ver, size_t *key_length) + struct SRPVerifier *ver, size_t *key_length) { - if (key_length) *key_length = hash_length(ver->hash_alg); + if (key_length) + *key_length = hash_length(ver->hash_alg); return ver->session_key; } @@ -809,8 +844,8 @@ size_t srp_verifier_get_session_key_length(struct SRPVerifier *ver) } /* user_M must be exactly SHA512_DIGEST_LENGTH bytes in size */ -void srp_verifier_verify_session( - struct SRPVerifier *ver, const unsigned char *user_M, unsigned char **bytes_HAMK) +void srp_verifier_verify_session(struct SRPVerifier *ver, const unsigned char *user_M, + unsigned char **bytes_HAMK) { if (memcmp(ver->M, user_M, hash_length(ver->hash_alg)) == 0) { ver->authenticated = 1; @@ -822,15 +857,16 @@ void srp_verifier_verify_session( /*******************************************************************************/ struct SRPUser *srp_user_new(SRP_HashAlgorithm alg, SRP_NGType ng_type, - const char *username, const char *username_for_verifier, - const unsigned char *bytes_password, size_t len_password, const char *n_hex, - const char *g_hex) + const char *username, const char *username_for_verifier, + const unsigned char *bytes_password, size_t len_password, + const char *n_hex, const char *g_hex) { struct SRPUser *usr = (struct SRPUser *)srp_alloc(sizeof(struct SRPUser)); size_t ulen = strlen(username) + 1; size_t uvlen = strlen(username_for_verifier) + 1; - if (!usr) goto err_exit; + if (!usr) + goto err_exit; if (init_random() != SRP_OK) /* Only happens once */ goto err_exit; @@ -842,14 +878,16 @@ struct SRPUser *srp_user_new(SRP_HashAlgorithm alg, SRP_NGType ng_type, mpz_init(usr->A); mpz_init(usr->S); - if (!usr->ng) goto err_exit; + if (!usr->ng) + goto err_exit; usr->username = (char *)srp_alloc(ulen); usr->username_verifier = (char *)srp_alloc(uvlen); usr->password = (unsigned char *)srp_alloc(len_password); usr->password_len = len_password; - if (!usr->username || !usr->password || !usr->username_verifier) goto err_exit; + if (!usr->username || !usr->password || !usr->username_verifier) + goto err_exit; memcpy(usr->username, username, ulen); memcpy(usr->username_verifier, username_for_verifier, uvlen); @@ -894,7 +932,8 @@ void srp_user_delete(struct SRPUser *usr) srp_free(usr->username_verifier); srp_free(usr->password); - if (usr->bytes_A) srp_free(usr->bytes_A); + if (usr->bytes_A) + srp_free(usr->bytes_A); memset(usr, 0, sizeof(*usr)); srp_free(usr); @@ -913,7 +952,8 @@ const char *srp_user_get_username(struct SRPUser *usr) const unsigned char *srp_user_get_session_key(struct SRPUser *usr, size_t *key_length) { - if (key_length) *key_length = hash_length(usr->hash_alg); + if (key_length) + *key_length = hash_length(usr->hash_alg); return usr->session_key; } @@ -932,7 +972,8 @@ SRP_Result srp_user_start_authentication(struct SRPUser *usr, char **username, if (bytes_a) { mpz_from_bin(bytes_a, len_a, usr->a); } else { - if (!mpz_fill_random(usr->a)) goto error_and_exit; + if (!mpz_fill_random(usr->a)) + goto error_and_exit; } mpz_powm(usr->A, usr->ng->g, usr->a, usr->ng->N); @@ -940,12 +981,14 @@ SRP_Result srp_user_start_authentication(struct SRPUser *usr, char **username, *len_A = mpz_num_bytes(usr->A); *bytes_A = (unsigned char *)srp_alloc(*len_A); - if (!*bytes_A) goto error_and_exit; + if (!*bytes_A) + goto error_and_exit; mpz_to_bin(usr->A, *bytes_A); usr->bytes_A = *bytes_A; - if (username) *username = usr->username; + if (username) + *username = usr->username; return SRP_OK; @@ -977,12 +1020,13 @@ void srp_user_process_challenge(struct SRPUser *usr, *len_M = 0; *bytes_M = 0; - if (!H_nn(u, usr->hash_alg, usr->ng->N, usr->A, B)) goto cleanup_and_exit; + if (!H_nn(u, usr->hash_alg, usr->ng->N, usr->A, B)) + goto cleanup_and_exit; srp_dbg_num(u, "Client calculated u: "); if (!calculate_x(x, usr->hash_alg, bytes_s, len_s, usr->username_verifier, - usr->password, usr->password_len)) + usr->password, usr->password_len)) goto cleanup_and_exit; srp_dbg_num(x, "Client calculated x: "); @@ -1006,19 +1050,23 @@ void srp_user_process_challenge(struct SRPUser *usr, mpz_powm(usr->S, tmp1, tmp2, usr->ng->N); // clang-format on - if (!hash_num(usr->hash_alg, usr->S, usr->session_key)) goto cleanup_and_exit; + if (!hash_num(usr->hash_alg, usr->S, usr->session_key)) + goto cleanup_and_exit; - if (!calculate_M(usr->hash_alg, usr->ng, usr->M, usr->username, bytes_s, len_s, - usr->A, B, usr->session_key)) + if (!calculate_M(usr->hash_alg, usr->ng, usr->M, usr->username, bytes_s, + len_s, usr->A, B, usr->session_key)) goto cleanup_and_exit; - if (!calculate_H_AMK(usr->hash_alg, usr->H_AMK, usr->A, usr->M, usr->session_key)) + if (!calculate_H_AMK(usr->hash_alg, usr->H_AMK, usr->A, usr->M, + usr->session_key)) goto cleanup_and_exit; *bytes_M = usr->M; - if (len_M) *len_M = hash_length(usr->hash_alg); + if (len_M) + *len_M = hash_length(usr->hash_alg); } else { *bytes_M = NULL; - if (len_M) *len_M = 0; + if (len_M) + *len_M = 0; } cleanup_and_exit: |