From 8fd6c61557d06a2434cf0e296df38f218ba2c186 Mon Sep 17 00:00:00 2001 From: marha Date: Fri, 19 Nov 2010 10:48:58 +0000 Subject: Remove tools again. Should have done it with svn merge --reintegrate --- tools/plink/sshdh.c | 230 ---------------------------------------------------- 1 file changed, 230 deletions(-) delete mode 100644 tools/plink/sshdh.c (limited to 'tools/plink/sshdh.c') diff --git a/tools/plink/sshdh.c b/tools/plink/sshdh.c deleted file mode 100644 index 41df756db..000000000 --- a/tools/plink/sshdh.c +++ /dev/null @@ -1,230 +0,0 @@ -/* - * Diffie-Hellman implementation for PuTTY. - */ - -#include "ssh.h" - -/* - * The primes used in the group1 and group14 key exchange. - */ -static const unsigned char P1[] = { - 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, - 0x21, 0x68, 0xC2, 0x34, 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, - 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74, 0x02, 0x0B, 0xBE, 0xA6, - 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD, - 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D, - 0xF2, 0x5F, 0x14, 0x37, 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, - 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6, 0xF4, 0x4C, 0x42, 0xE9, - 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED, - 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11, - 0x7C, 0x4B, 0x1F, 0xE6, 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE6, 0x53, 0x81, - 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF -}; -static const unsigned char P14[] = { - 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, - 0x21, 0x68, 0xC2, 0x34, 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, - 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74, 0x02, 0x0B, 0xBE, 0xA6, - 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD, - 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D, - 0xF2, 0x5F, 0x14, 0x37, 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, - 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6, 0xF4, 0x4C, 0x42, 0xE9, - 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED, - 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11, - 0x7C, 0x4B, 0x1F, 0xE6, 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D, - 0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05, 0x98, 0xDA, 0x48, 0x36, - 0x1C, 0x55, 0xD3, 0x9A, 0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F, - 0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96, 0x1C, 0x62, 0xF3, 0x56, - 0x20, 0x85, 0x52, 0xBB, 0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D, - 0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04, 0xF1, 0x74, 0x6C, 0x08, - 0xCA, 0x18, 0x21, 0x7C, 0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B, - 0xE3, 0x9E, 0x77, 0x2C, 0x18, 0x0E, 0x86, 0x03, 0x9B, 0x27, 0x83, 0xA2, - 0xEC, 0x07, 0xA2, 0x8F, 0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9, - 0xDE, 0x2B, 0xCB, 0xF6, 0x95, 0x58, 0x17, 0x18, 0x39, 0x95, 0x49, 0x7C, - 0xEA, 0x95, 0x6A, 0xE5, 0x15, 0xD2, 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10, - 0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAC, 0xAA, 0x68, 0xFF, 0xFF, 0xFF, 0xFF, - 0xFF, 0xFF, 0xFF, 0xFF -}; - -/* - * The generator g = 2 (used for both group1 and group14). - */ -static const unsigned char G[] = { 2 }; - -static const struct ssh_kex ssh_diffiehellman_group1_sha1 = { - "diffie-hellman-group1-sha1", "group1", - KEXTYPE_DH, P1, G, lenof(P1), lenof(G), &ssh_sha1 -}; - -static const struct ssh_kex *const group1_list[] = { - &ssh_diffiehellman_group1_sha1 -}; - -const struct ssh_kexes ssh_diffiehellman_group1 = { - sizeof(group1_list) / sizeof(*group1_list), - group1_list -}; - -static const struct ssh_kex ssh_diffiehellman_group14_sha1 = { - "diffie-hellman-group14-sha1", "group14", - KEXTYPE_DH, P14, G, lenof(P14), lenof(G), &ssh_sha1 -}; - -static const struct ssh_kex *const group14_list[] = { - &ssh_diffiehellman_group14_sha1 -}; - -const struct ssh_kexes ssh_diffiehellman_group14 = { - sizeof(group14_list) / sizeof(*group14_list), - group14_list -}; - -static const struct ssh_kex ssh_diffiehellman_gex_sha256 = { - "diffie-hellman-group-exchange-sha256", NULL, - KEXTYPE_DH, NULL, NULL, 0, 0, &ssh_sha256 -}; - -static const struct ssh_kex ssh_diffiehellman_gex_sha1 = { - "diffie-hellman-group-exchange-sha1", NULL, - KEXTYPE_DH, NULL, NULL, 0, 0, &ssh_sha1 -}; - -static const struct ssh_kex *const gex_list[] = { - &ssh_diffiehellman_gex_sha256, - &ssh_diffiehellman_gex_sha1 -}; - -const struct ssh_kexes ssh_diffiehellman_gex = { - sizeof(gex_list) / sizeof(*gex_list), - gex_list -}; - -/* - * Variables. - */ -struct dh_ctx { - Bignum x, e, p, q, qmask, g; -}; - -/* - * Common DH initialisation. - */ -static void dh_init(struct dh_ctx *ctx) -{ - ctx->q = bignum_rshift(ctx->p, 1); - ctx->qmask = bignum_bitmask(ctx->q); - ctx->x = ctx->e = NULL; -} - -/* - * Initialise DH for a standard group. - */ -void *dh_setup_group(const struct ssh_kex *kex) -{ - struct dh_ctx *ctx = snew(struct dh_ctx); - ctx->p = bignum_from_bytes(kex->pdata, kex->plen); - ctx->g = bignum_from_bytes(kex->gdata, kex->glen); - dh_init(ctx); - return ctx; -} - -/* - * Initialise DH for a server-supplied group. - */ -void *dh_setup_gex(Bignum pval, Bignum gval) -{ - struct dh_ctx *ctx = snew(struct dh_ctx); - ctx->p = copybn(pval); - ctx->g = copybn(gval); - dh_init(ctx); - return ctx; -} - -/* - * Clean up and free a context. - */ -void dh_cleanup(void *handle) -{ - struct dh_ctx *ctx = (struct dh_ctx *)handle; - freebn(ctx->x); - freebn(ctx->e); - freebn(ctx->p); - freebn(ctx->g); - freebn(ctx->q); - freebn(ctx->qmask); - sfree(ctx); -} - -/* - * DH stage 1: invent a number x between 1 and q, and compute e = - * g^x mod p. Return e. - * - * If `nbits' is greater than zero, it is used as an upper limit - * for the number of bits in x. This is safe provided that (a) you - * use twice as many bits in x as the number of bits you expect to - * use in your session key, and (b) the DH group is a safe prime - * (which SSH demands that it must be). - * - * P. C. van Oorschot, M. J. Wiener - * "On Diffie-Hellman Key Agreement with Short Exponents". - * Advances in Cryptology: Proceedings of Eurocrypt '96 - * Springer-Verlag, May 1996. - */ -Bignum dh_create_e(void *handle, int nbits) -{ - struct dh_ctx *ctx = (struct dh_ctx *)handle; - int i; - - int nbytes; - unsigned char *buf; - - nbytes = ssh1_bignum_length(ctx->qmask); - buf = snewn(nbytes, unsigned char); - - do { - /* - * Create a potential x, by ANDing a string of random bytes - * with qmask. - */ - if (ctx->x) - freebn(ctx->x); - if (nbits == 0 || nbits > bignum_bitcount(ctx->qmask)) { - ssh1_write_bignum(buf, ctx->qmask); - for (i = 2; i < nbytes; i++) - buf[i] &= random_byte(); - ssh1_read_bignum(buf, nbytes, &ctx->x); /* can't fail */ - } else { - int b, nb; - ctx->x = bn_power_2(nbits); - b = nb = 0; - for (i = 0; i < nbits; i++) { - if (nb == 0) { - nb = 8; - b = random_byte(); - } - bignum_set_bit(ctx->x, i, b & 1); - b >>= 1; - nb--; - } - } - } while (bignum_cmp(ctx->x, One) <= 0 || bignum_cmp(ctx->x, ctx->q) >= 0); - - sfree(buf); - - /* - * Done. Now compute e = g^x mod p. - */ - ctx->e = modpow(ctx->g, ctx->x, ctx->p); - - return ctx->e; -} - -/* - * DH stage 2: given a number f, compute K = f^x mod p. - */ -Bignum dh_find_K(void *handle, Bignum f) -{ - struct dh_ctx *ctx = (struct dh_ctx *)handle; - Bignum ret; - ret = modpow(f, ctx->x, ctx->p); - return ret; -} -- cgit v1.2.3