Mercurial > dropbear
view libtomcrypt/src/pk/pkcs1/pkcs_1_i2osp.c @ 397:2908122e9eed channel-fix
disapproval of revision '1250b8af44b62d8f4fe0f8d9fc7e7a1cc34e7e1c'
author | Matt Johnston <matt@ucc.asn.au> |
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date | Sat, 03 Feb 2007 08:10:09 +0000 |
parents | 1b9e69c058d2 |
children | 0cbe8f6dbf9e |
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/* LibTomCrypt, modular cryptographic library -- Tom St Denis * * LibTomCrypt is a library that provides various cryptographic * algorithms in a highly modular and flexible manner. * * The library is free for all purposes without any express * guarantee it works. * * Tom St Denis, [email protected], http://libtomcrypt.org */ #include "tomcrypt.h" /** @file pkcs_1_i2osp.c Integer to Octet I2OSP, Tom St Denis */ #ifdef PKCS_1 /* always stores the same # of bytes, pads with leading zero bytes as required */ /** PKCS #1 Integer to binary @param n The integer to store @param modulus_len The length of the RSA modulus @param out [out] The destination for the integer @return CRYPT_OK if successful */ int pkcs_1_i2osp(mp_int *n, unsigned long modulus_len, unsigned char *out) { int err; unsigned long size; size = mp_unsigned_bin_size(n); if (size > modulus_len) { return CRYPT_BUFFER_OVERFLOW; } /* store it */ zeromem(out, modulus_len); if ((err = mp_to_unsigned_bin(n, out+(modulus_len-size))) != MP_OKAY) { return mpi_to_ltc_error(err); } return CRYPT_OK; } #endif /* PKCS_1 */ /* $Source: /cvs/libtom/libtomcrypt/src/pk/pkcs1/pkcs_1_i2osp.c,v $ */ /* $Revision: 1.3 $ */ /* $Date: 2005/05/05 14:35:59 $ */