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comparison random.c @ 689:c3de235d9506

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/dev/random blocks on busy servers too.
author Matt Johnston <matt@ucc.asn.au>
date Thu, 19 Jul 2012 21:34:27 +0800
parents 650c41a4909a
children c85bb68e1db6
comparison
equal deleted inserted replaced
688:650c41a4909a 689:c3de235d9506
153 fwrite(buf, sizeof(buf), 1, f); 153 fwrite(buf, sizeof(buf), 1, f);
154 fclose(f); 154 fclose(f);
155 #endif 155 #endif
156 } 156 }
157 157
158 /* add entropy from the stronger, blocking source /dev/random. Only used
159 * for generating persistent private keys (RSA and DSS) */
160 void seedstrongrandom()
161 {
162 /* We assume that PRNGD is a strong source, so don't need to do anything here */
163 #ifndef DROPBEAR_PRNGD_SOCKET
164 hash_state hs;
165
166 sha1_process(&hs, (void*)hashpool, sizeof(hashpool));
167 if (process_file(&hs, "/dev/random", INIT_SEED_SIZE, 0)
168 != DROPBEAR_SUCCESS) {
169 dropbear_exit("Failure reading random device %s", "/dev/random");
170 }
171
172 sha1_done(&hs, hashpool);
173 #endif
174 }
175
176 /* Initialise the prng from /dev/urandom or prngd. This function can 158 /* Initialise the prng from /dev/urandom or prngd. This function can
177 * be called multiple times */ 159 * be called multiple times */
178 void seedrandom() { 160 void seedrandom() {
179 161
180 hash_state hs; 162 hash_state hs;