Mercurial > dropbear
view libtomcrypt/src/pk/asn1/der/ia5/der_encode_ia5_string.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 der_encode_ia5_string.c ASN.1 DER, encode a IA5 STRING, Tom St Denis */ #ifdef LTC_DER /** Store an IA5 STRING @param in The array of IA5 to store (one per char) @param inlen The number of IA5 to store @param out [out] The destination for the DER encoded IA5 STRING @param outlen [in/out] The max size and resulting size of the DER IA5 STRING @return CRYPT_OK if successful */ int der_encode_ia5_string(const unsigned char *in, unsigned long inlen, unsigned char *out, unsigned long *outlen) { unsigned long x, y, len; int err; LTC_ARGCHK(in != NULL); LTC_ARGCHK(out != NULL); LTC_ARGCHK(outlen != NULL); /* get the size */ if ((err = der_length_ia5_string(in, inlen, &len)) != CRYPT_OK) { return err; } /* too big? */ if (len > *outlen) { return CRYPT_BUFFER_OVERFLOW; } /* encode the header+len */ x = 0; out[x++] = 0x16; if (inlen < 128) { out[x++] = inlen; } else if (inlen < 256) { out[x++] = 0x81; out[x++] = inlen; } else if (inlen < 65536UL) { out[x++] = 0x82; out[x++] = (inlen>>8)&255; out[x++] = inlen&255; } else if (inlen < 16777216UL) { out[x++] = 0x83; out[x++] = (inlen>>16)&255; out[x++] = (inlen>>8)&255; out[x++] = inlen&255; } else { return CRYPT_INVALID_ARG; } /* store octets */ for (y = 0; y < inlen; y++) { out[x++] = der_ia5_char_encode(in[y]); } /* retun length */ *outlen = x; return CRYPT_OK; } #endif /* $Source: /cvs/libtom/libtomcrypt/src/pk/asn1/der/ia5/der_encode_ia5_string.c,v $ */ /* $Revision: 1.1 $ */ /* $Date: 2005/05/16 15:08:11 $ */