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35 #include <openssl/dh.h>
36 #include <trust_router/tr_dh.h>
37 #include <openssl/bn.h>
38 #include <openssl/sha.h>
41 #include <tid_internal.h>
45 unsigned char tr_2048_dhprime[2048/8] = {
46 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
47 0xC9, 0x0F, 0xDA, 0xA2, 0x21, 0x68, 0xC2, 0x34,
48 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1,
49 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74,
50 0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B, 0x22,
51 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
52 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B,
53 0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37,
54 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45,
55 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6,
56 0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B,
57 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
58 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5,
59 0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6,
60 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D,
61 0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05,
62 0x98, 0xDA, 0x48, 0x36, 0x1C, 0x55, 0xD3, 0x9A,
63 0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F,
64 0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96,
65 0x1C, 0x62, 0xF3, 0x56, 0x20, 0x85, 0x52, 0xBB,
66 0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D,
67 0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04,
68 0xF1, 0x74, 0x6C, 0x08, 0xCA, 0x18, 0x21, 0x7C,
69 0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B,
70 0xE3, 0x9E, 0x77, 0x2C, 0x18, 0x0E, 0x86, 0x03,
71 0x9B, 0x27, 0x83, 0xA2, 0xEC, 0x07, 0xA2, 0x8F,
72 0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9,
73 0xDE, 0x2B, 0xCB, 0xF6, 0x95, 0x58, 0x17, 0x18,
74 0x39, 0x95, 0x49, 0x7C, 0xEA, 0x95, 0x6A, 0xE5,
75 0x15, 0xD2, 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10,
76 0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAC, 0xAA, 0x68,
77 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
80 DH *tr_create_dh_params(unsigned char *priv_key,
86 if (NULL == (dh = DH_new()))
89 if ((NULL == (dh->g = BN_new())) ||
90 (NULL == (dh->p = BN_new())) ||
91 (NULL == (dh->q = BN_new()))) {
95 BN_set_word(dh->g, 2);
96 dh->p = BN_bin2bn(tr_2048_dhprime, sizeof(tr_2048_dhprime), NULL);
97 BN_rshift1(dh->q, dh->p);
99 if ((priv_key) && (keylen > 0))
100 dh->priv_key = BN_bin2bn(priv_key, keylen, NULL);
102 DH_generate_key(dh); /* generates the public key */
104 DH_check(dh, &dh_err);
106 tr_warning("Warning: dh_check failed with %d", dh_err);
107 if (dh_err & DH_CHECK_P_NOT_PRIME)
108 tr_warning(": p value is not prime");
109 else if (dh_err & DH_CHECK_P_NOT_SAFE_PRIME)
110 tr_warning(": p value is not a safe prime");
111 else if (dh_err & DH_UNABLE_TO_CHECK_GENERATOR)
112 tr_warning(": unable to check the generator value");
113 else if (dh_err & DH_NOT_SUITABLE_GENERATOR)
114 tr_warning(": the g value is not a generator");
116 tr_warning("unhandled error %i", dh_err);
122 DH *tr_create_matching_dh (unsigned char *priv_key,
131 if (NULL == (dh = DH_new())) {
132 tr_crit("tr_create_matching_dh: unable to allocate new DH structure.");
136 if ((NULL == (dh->g = BN_dup(in_dh->g))) ||
137 (NULL == (dh->p = BN_dup(in_dh->p)))) {
139 tr_debug("tr_create_matching_dh: Invalid dh parameter values, can't be duped.");
143 /* TBD -- share code with previous function */
144 if ((priv_key) && (keylen > 0))
145 dh->priv_key = BN_bin2bn(priv_key, keylen, NULL);
147 DH_generate_key(dh); /* generates the public key */
148 DH_check(dh, &dh_err);
150 tr_warning("Warning: dh_check failed with %d", dh_err);
151 if (dh_err & DH_CHECK_P_NOT_PRIME)
152 tr_warning(": p value is not prime");
153 else if (dh_err & DH_CHECK_P_NOT_SAFE_PRIME)
154 tr_warning(": p value is not a safe prime");
155 else if (dh_err & DH_UNABLE_TO_CHECK_GENERATOR)
156 tr_warning(": unable to check the generator value");
157 else if (dh_err & DH_NOT_SUITABLE_GENERATOR)
158 tr_warning(": the g value is not a generator");
160 tr_warning("unhandled error %i", dh_err);
166 void tr_destroy_dh_params(DH *dh) {
173 int tr_compute_dh_key(unsigned char **pbuf,
177 unsigned char *buf = NULL;;
183 tr_debug("tr_compute_dh_key: Invalid parameters.");
187 buflen = DH_size(priv_dh);
188 buf = malloc(buflen);
190 tr_crit("tr_compute_dh_key: out of memory");
195 rc = DH_compute_key(buf, pub_key, priv_dh);
207 int tr_dh_pub_hash(TID_REQ *request,
208 unsigned char **out_digest,
211 const BIGNUM *pub = request->tidc_dh->pub_key;
212 unsigned char *bn_bytes = talloc_zero_size(request, BN_num_bytes(pub));
213 unsigned char *digest = talloc_zero_size(request, SHA_DIGEST_LENGTH+1);
214 assert(bn_bytes && digest);
215 BN_bn2bin(pub, bn_bytes);
216 SHA1(bn_bytes, BN_num_bytes(pub), digest);
217 *out_digest = digest;
218 *out_len = SHA_DIGEST_LENGTH;
222 void tr_dh_free(unsigned char *dh_buf)