Mercurial > dropbear

annotate libtomcrypt/src/pk/pkcs1/pkcs_1_i2osp.c @ 1156:a8f4dade70e5

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avoid getpass when not used some systems (like android's bionic) do not provide getpass. you can disable ENABLE_CLI_PASSWORD_AUTH & ENABLE_CLI_INTERACT_AUTH to avoid its use (and rely on pubkey auth), but the link still fails because the support file calls getpass. do not define this func if both of those auth methods are not used.
author Mike Frysinger <vapier@gentoo.org>
date Wed, 21 Oct 2015 22:39:55 +0800
parents 0cbe8f6dbf9e
children f849a5ca2efc
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
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2 *
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3 * LibTomCrypt is a library that provides various cryptographic
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4 * algorithms in a highly modular and flexible manner.
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5 *
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6 * The library is free for all purposes without any express
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7 * guarantee it works.
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8 *
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9 * Tom St Denis, [email protected], http://libtomcrypt.com
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10 */
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11 #include "tomcrypt.h"
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13 /**
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14 @file pkcs_1_i2osp.c
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15 Integer to Octet I2OSP, Tom St Denis
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16 */
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18 #ifdef PKCS_1
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20 /* always stores the same # of bytes, pads with leading zero bytes
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21 as required
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22 */
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24 /**
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25 PKCS #1 Integer to binary
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26 @param n The integer to store
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27 @param modulus_len The length of the RSA modulus
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28 @param out [out] The destination for the integer
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29 @return CRYPT_OK if successful
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30 */
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31 int pkcs_1_i2osp(void *n, unsigned long modulus_len, unsigned char *out)
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32 {
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33 unsigned long size;
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35 size = mp_unsigned_bin_size(n);
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37 if (size > modulus_len) {
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38 return CRYPT_BUFFER_OVERFLOW;
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39 }
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41 /* store it */
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42 zeromem(out, modulus_len);
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43 return mp_to_unsigned_bin(n, out+(modulus_len-size));
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44 }
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46 #endif /* PKCS_1 */
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49 /* $Source: /cvs/libtom/libtomcrypt/src/pk/pkcs1/pkcs_1_i2osp.c,v $ */
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50 /* $Revision: 1.5 $ */
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51 /* $Date: 2006/03/31 14:15:35 $ */