annotate dh_groups.c @ 1715:3974f087d9c0

Disallow leading lines before the ident for server (#102) Per RFC4253 4.2 clients must be able to process other lines of data before the version string, server behavior is not defined neither with MUST/SHOULD nor with MAY. If server process up to 50 lines too - it may cause too long hanging session with invalid/evil client that consume host resources and potentially may lead to DDoS on poor embedded boxes. Let's require first line from client to be version string and fail early if it's not - matches both RFC and real OpenSSH behavior.
author Vladislav Grishenko <themiron@users.noreply.github.com>
date Mon, 15 Jun 2020 18:22:18 +0500
parents ee6ccc2ecc47
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1225
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1 #include "options.h"
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2 #include "dh_groups.h"
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3
1703
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4 #if DROPBEAR_NORMAL_DH
1702
8f93f37c01de Allow DH to be completely disabled (#97)
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5
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6 #if DROPBEAR_DH_GROUP1
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7 /* diffie-hellman-group1-sha1 value for p */
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8 const unsigned char dh_p_1[DH_P_1_LEN] = {
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9 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2,
1284
5d560c68c70c Fix whitespace missed in merge
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10 0x21, 0x68, 0xC2, 0x34, 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1,
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11 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74, 0x02, 0x0B, 0xBE, 0xA6,
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12 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
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13 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D,
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14 0xF2, 0x5F, 0x14, 0x37, 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45,
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15 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6, 0xF4, 0x4C, 0x42, 0xE9,
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16 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
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17 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11,
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18 0x7C, 0x4B, 0x1F, 0xE6, 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE6, 0x53, 0x81,
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19 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
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20 #endif /* DROPBEAR_DH_GROUP1 */
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21
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22 #if DROPBEAR_DH_GROUP14
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23 /* diffie-hellman-group14-sha1 value for p */
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24 const unsigned char dh_p_14[DH_P_14_LEN] = {
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25 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2,
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5d560c68c70c Fix whitespace missed in merge
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26 0x21, 0x68, 0xC2, 0x34, 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1,
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27 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74, 0x02, 0x0B, 0xBE, 0xA6,
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28 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD,
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29 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D,
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30 0xF2, 0x5F, 0x14, 0x37, 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45,
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31 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6, 0xF4, 0x4C, 0x42, 0xE9,
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32 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED,
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33 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11,
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34 0x7C, 0x4B, 0x1F, 0xE6, 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D,
82e2037d34ea Move dh group constants to a separate file
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35 0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05, 0x98, 0xDA, 0x48, 0x36,
82e2037d34ea Move dh group constants to a separate file
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36 0x1C, 0x55, 0xD3, 0x9A, 0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F,
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37 0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96, 0x1C, 0x62, 0xF3, 0x56,
82e2037d34ea Move dh group constants to a separate file
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38 0x20, 0x85, 0x52, 0xBB, 0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D,
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39 0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04, 0xF1, 0x74, 0x6C, 0x08,
82e2037d34ea Move dh group constants to a separate file
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40 0xCA, 0x18, 0x21, 0x7C, 0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B,
82e2037d34ea Move dh group constants to a separate file
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41 0xE3, 0x9E, 0x77, 0x2C, 0x18, 0x0E, 0x86, 0x03, 0x9B, 0x27, 0x83, 0xA2,
82e2037d34ea Move dh group constants to a separate file
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42 0xEC, 0x07, 0xA2, 0x8F, 0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9,
82e2037d34ea Move dh group constants to a separate file
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43 0xDE, 0x2B, 0xCB, 0xF6, 0x95, 0x58, 0x17, 0x18, 0x39, 0x95, 0x49, 0x7C,
82e2037d34ea Move dh group constants to a separate file
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44 0xEA, 0x95, 0x6A, 0xE5, 0x15, 0xD2, 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10,
82e2037d34ea Move dh group constants to a separate file
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45 0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAC, 0xAA, 0x68, 0xFF, 0xFF, 0xFF, 0xFF,
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46 0xFF, 0xFF, 0xFF, 0xFF};
1248
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47 #endif /* DROPBEAR_DH_GROUP14 */
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48
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49 #if DROPBEAR_DH_GROUP16
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50 /* diffie-hellman-group16-256 value for p */
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51 const unsigned char dh_p_16[DH_P_16_LEN] = {
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52 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, 0x21,
6a7938ba004a add dh group15 and group16, disabled by default
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53 0x68, 0xC2, 0x34, 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, 0x29, 0x02,
6a7938ba004a add dh group15 and group16, disabled by default
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54 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74, 0x02, 0x0B, 0xBE, 0xA6, 0x3B, 0x13, 0x9B,
6a7938ba004a add dh group15 and group16, disabled by default
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55 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD, 0xEF, 0x95, 0x19, 0xB3,
6a7938ba004a add dh group15 and group16, disabled by default
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diff changeset
56 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D, 0xF2, 0x5F, 0x14, 0x37, 0x4F,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
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diff changeset
57 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
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diff changeset
58 0x7E, 0xC6, 0xF4, 0x4C, 0x42, 0xE9, 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
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diff changeset
59 0xB6, 0xF4, 0x06, 0xB7, 0xED, 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5,
6a7938ba004a add dh group15 and group16, disabled by default
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diff changeset
60 0xAE, 0x9F, 0x24, 0x11, 0x7C, 0x4B, 0x1F, 0xE6, 0x49, 0x28, 0x66, 0x51, 0xEC,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
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diff changeset
61 0xE4, 0x5B, 0x3D, 0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05, 0x98, 0xDA,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
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diff changeset
62 0x48, 0x36, 0x1C, 0x55, 0xD3, 0x9A, 0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF,
6a7938ba004a add dh group15 and group16, disabled by default
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diff changeset
63 0x5F, 0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96, 0x1C, 0x62, 0xF3, 0x56,
6a7938ba004a add dh group15 and group16, disabled by default
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64 0x20, 0x85, 0x52, 0xBB, 0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D, 0x67,
6a7938ba004a add dh group15 and group16, disabled by default
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65 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04, 0xF1, 0x74, 0x6C, 0x08, 0xCA, 0x18,
6a7938ba004a add dh group15 and group16, disabled by default
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diff changeset
66 0x21, 0x7C, 0x32, 0x90, 0x5E, 0x46, 0x2E, 0x36, 0xCE, 0x3B, 0xE3, 0x9E, 0x77,
6a7938ba004a add dh group15 and group16, disabled by default
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67 0x2C, 0x18, 0x0E, 0x86, 0x03, 0x9B, 0x27, 0x83, 0xA2, 0xEC, 0x07, 0xA2, 0x8F,
6a7938ba004a add dh group15 and group16, disabled by default
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68 0xB5, 0xC5, 0x5D, 0xF0, 0x6F, 0x4C, 0x52, 0xC9, 0xDE, 0x2B, 0xCB, 0xF6, 0x95,
6a7938ba004a add dh group15 and group16, disabled by default
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diff changeset
69 0x58, 0x17, 0x18, 0x39, 0x95, 0x49, 0x7C, 0xEA, 0x95, 0x6A, 0xE5, 0x15, 0xD2,
6a7938ba004a add dh group15 and group16, disabled by default
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diff changeset
70 0x26, 0x18, 0x98, 0xFA, 0x05, 0x10, 0x15, 0x72, 0x8E, 0x5A, 0x8A, 0xAA, 0xC4,
6a7938ba004a add dh group15 and group16, disabled by default
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diff changeset
71 0x2D, 0xAD, 0x33, 0x17, 0x0D, 0x04, 0x50, 0x7A, 0x33, 0xA8, 0x55, 0x21, 0xAB,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
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diff changeset
72 0xDF, 0x1C, 0xBA, 0x64, 0xEC, 0xFB, 0x85, 0x04, 0x58, 0xDB, 0xEF, 0x0A, 0x8A,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
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diff changeset
73 0xEA, 0x71, 0x57, 0x5D, 0x06, 0x0C, 0x7D, 0xB3, 0x97, 0x0F, 0x85, 0xA6, 0xE1,
6a7938ba004a add dh group15 and group16, disabled by default
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diff changeset
74 0xE4, 0xC7, 0xAB, 0xF5, 0xAE, 0x8C, 0xDB, 0x09, 0x33, 0xD7, 0x1E, 0x8C, 0x94,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
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diff changeset
75 0xE0, 0x4A, 0x25, 0x61, 0x9D, 0xCE, 0xE3, 0xD2, 0x26, 0x1A, 0xD2, 0xEE, 0x6B,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
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diff changeset
76 0xF1, 0x2F, 0xFA, 0x06, 0xD9, 0x8A, 0x08, 0x64, 0xD8, 0x76, 0x02, 0x73, 0x3E,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
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diff changeset
77 0xC8, 0x6A, 0x64, 0x52, 0x1F, 0x2B, 0x18, 0x17, 0x7B, 0x20, 0x0C, 0xBB, 0xE1,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
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diff changeset
78 0x17, 0x57, 0x7A, 0x61, 0x5D, 0x6C, 0x77, 0x09, 0x88, 0xC0, 0xBA, 0xD9, 0x46,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
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diff changeset
79 0xE2, 0x08, 0xE2, 0x4F, 0xA0, 0x74, 0xE5, 0xAB, 0x31, 0x43, 0xDB, 0x5B, 0xFC,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
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diff changeset
80 0xE0, 0xFD, 0x10, 0x8E, 0x4B, 0x82, 0xD1, 0x20, 0xA9, 0x21, 0x08, 0x01, 0x1A,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
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diff changeset
81 0x72, 0x3C, 0x12, 0xA7, 0x87, 0xE6, 0xD7, 0x88, 0x71, 0x9A, 0x10, 0xBD, 0xBA,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 1224
diff changeset
82 0x5B, 0x26, 0x99, 0xC3, 0x27, 0x18, 0x6A, 0xF4, 0xE2, 0x3C, 0x1A, 0x94, 0x68,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 1224
diff changeset
83 0x34, 0xB6, 0x15, 0x0B, 0xDA, 0x25, 0x83, 0xE9, 0xCA, 0x2A, 0xD4, 0x4C, 0xE8,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
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diff changeset
84 0xDB, 0xBB, 0xC2, 0xDB, 0x04, 0xDE, 0x8E, 0xF9, 0x2E, 0x8E, 0xFC, 0x14, 0x1F,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 1224
diff changeset
85 0xBE, 0xCA, 0xA6, 0x28, 0x7C, 0x59, 0x47, 0x4E, 0x6B, 0xC0, 0x5D, 0x99, 0xB2,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 1224
diff changeset
86 0x96, 0x4F, 0xA0, 0x90, 0xC3, 0xA2, 0x23, 0x3B, 0xA1, 0x86, 0x51, 0x5B, 0xE7,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 1224
diff changeset
87 0xED, 0x1F, 0x61, 0x29, 0x70, 0xCE, 0xE2, 0xD7, 0xAF, 0xB8, 0x1B, 0xDD, 0x76,
6a7938ba004a add dh group15 and group16, disabled by default
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parents: 1224
diff changeset
88 0x21, 0x70, 0x48, 0x1C, 0xD0, 0x06, 0x91, 0x27, 0xD5, 0xB0, 0x5A, 0xA9, 0x93,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 1224
diff changeset
89 0xB4, 0xEA, 0x98, 0x8D, 0x8F, 0xDD, 0xC1, 0x86, 0xFF, 0xB7, 0xDC, 0x90, 0xA6,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 1224
diff changeset
90 0xC0, 0x8F, 0x4D, 0xF4, 0x35, 0xC9, 0x34, 0x06, 0x31, 0x99, 0xFF, 0xFF, 0xFF,
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 1224
diff changeset
91 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 1224
diff changeset
92 #endif /* DROPBEAR_DH_GROUP16 */
6a7938ba004a add dh group15 and group16, disabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 1224
diff changeset
93
1248
739b3909c499 Get rid of group15, move group16 to sha512.
Matt Johnston <matt@ucc.asn.au>
parents: 1225
diff changeset
94 /* Same for all groups */
1224
82e2037d34ea Move dh group constants to a separate file
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
95 const int DH_G_VAL = 2;
82e2037d34ea Move dh group constants to a separate file
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
96
1703
ee6ccc2ecc47 Fix typo DROPBEAR_NORMAL_DH
Matt Johnston <matt@ucc.asn.au>
parents: 1702
diff changeset
97 #endif /* DROPBEAR_NORMAL_DH */