| /* 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, tomstdenis@gmail.com, http://libtomcrypt.org |
| */ |
| #include "tomcrypt.h" |
| |
| /** |
| @file der_encode_printable_string.c |
| ASN.1 DER, encode a printable STRING, Tom St Denis |
| */ |
| |
| #ifdef LTC_DER |
| |
| /** |
| Store an printable STRING |
| @param in The array of printable to store (one per char) |
| @param inlen The number of printable to store |
| @param out [out] The destination for the DER encoded printable STRING |
| @param outlen [in/out] The max size and resulting size of the DER printable STRING |
| @return CRYPT_OK if successful |
| */ |
| int der_encode_printable_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_printable_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++] = 0x13; |
| 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_printable_char_encode(in[y]); |
| } |
| |
| /* retun length */ |
| *outlen = x; |
| |
| return CRYPT_OK; |
| } |
| |
| #endif |
| |
| /* $Source: /cvs/libtom/libtomcrypt/src/pk/asn1/der/printable_string/der_encode_printable_string.c,v $ */ |
| /* $Revision: 1.1 $ */ |
| /* $Date: 2005/05/21 02:29:54 $ */ |