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Import code from previous AssetBuilder version
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Jan
125
thirdparty/libtomcrypt/pk/asn1/der/utctime/der_decode_utctime.c
vendored
Normal file
125
thirdparty/libtomcrypt/pk/asn1/der/utctime/der_decode_utctime.c
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@ -0,0 +1,125 @@
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/* LibTomCrypt, modular cryptographic library -- Tom St Denis
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*
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* LibTomCrypt is a library that provides various cryptographic
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* algorithms in a highly modular and flexible manner.
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*
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* The library is free for all purposes without any express
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* guarantee it works.
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*/
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#include "tomcrypt.h"
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/**
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@file der_decode_utctime.c
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ASN.1 DER, decode a UTCTIME, Tom St Denis
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*/
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#ifdef LTC_DER
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static int _char_to_int(unsigned char x)
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{
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switch (x) {
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case '0': return 0;
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case '1': return 1;
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case '2': return 2;
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case '3': return 3;
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case '4': return 4;
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case '5': return 5;
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case '6': return 6;
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case '7': return 7;
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case '8': return 8;
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case '9': return 9;
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default: return 100;
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}
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}
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#define DECODE_V(y, max) \
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y = _char_to_int(buf[x])*10 + _char_to_int(buf[x+1]); \
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if (y >= max) return CRYPT_INVALID_PACKET; \
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x += 2;
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/**
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Decodes a UTC time structure in DER format (reads all 6 valid encoding formats)
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@param in Input buffer
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@param inlen Length of input buffer in octets
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@param out [out] Destination of UTC time structure
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@return CRYPT_OK if successful
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*/
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int der_decode_utctime(const unsigned char *in, unsigned long *inlen,
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ltc_utctime *out)
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{
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unsigned char buf[32] = { 0 }; /* initialize as all zeroes */
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unsigned long x;
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int y;
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LTC_ARGCHK(in != NULL);
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LTC_ARGCHK(inlen != NULL);
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LTC_ARGCHK(out != NULL);
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/* check header */
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if (*inlen < 2UL || (in[1] >= sizeof(buf)) || ((in[1] + 2UL) > *inlen)) {
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return CRYPT_INVALID_PACKET;
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}
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/* decode the string */
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for (x = 0; x < in[1]; x++) {
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y = der_ia5_value_decode(in[x+2]);
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if (y == -1) {
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return CRYPT_INVALID_PACKET;
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}
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buf[x] = y;
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}
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*inlen = 2 + x;
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/* possible encodings are
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YYMMDDhhmmZ
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YYMMDDhhmm+hh'mm'
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YYMMDDhhmm-hh'mm'
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YYMMDDhhmmssZ
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YYMMDDhhmmss+hh'mm'
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YYMMDDhhmmss-hh'mm'
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So let's do a trivial decode upto [including] mm
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*/
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x = 0;
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DECODE_V(out->YY, 100);
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DECODE_V(out->MM, 13);
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DECODE_V(out->DD, 32);
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DECODE_V(out->hh, 24);
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DECODE_V(out->mm, 60);
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/* clear timezone and seconds info */
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out->off_dir = out->off_hh = out->off_mm = out->ss = 0;
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/* now is it Z, +, - or 0-9 */
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if (buf[x] == 'Z') {
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return CRYPT_OK;
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} else if (buf[x] == '+' || buf[x] == '-') {
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out->off_dir = (buf[x++] == '+') ? 0 : 1;
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DECODE_V(out->off_hh, 24);
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DECODE_V(out->off_mm, 60);
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return CRYPT_OK;
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}
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/* decode seconds */
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DECODE_V(out->ss, 60);
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/* now is it Z, +, - */
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if (buf[x] == 'Z') {
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return CRYPT_OK;
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} else if (buf[x] == '+' || buf[x] == '-') {
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out->off_dir = (buf[x++] == '+') ? 0 : 1;
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DECODE_V(out->off_hh, 24);
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DECODE_V(out->off_mm, 60);
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return CRYPT_OK;
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} else {
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return CRYPT_INVALID_PACKET;
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}
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}
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#endif
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/* ref: HEAD -> master, tag: v1.18.2 */
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/* git commit: 7e7eb695d581782f04b24dc444cbfde86af59853 */
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/* commit time: 2018-07-01 22:49:01 +0200 */
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81
thirdparty/libtomcrypt/pk/asn1/der/utctime/der_encode_utctime.c
vendored
Normal file
81
thirdparty/libtomcrypt/pk/asn1/der/utctime/der_encode_utctime.c
vendored
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@ -0,0 +1,81 @@
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/* LibTomCrypt, modular cryptographic library -- Tom St Denis
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*
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* LibTomCrypt is a library that provides various cryptographic
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* algorithms in a highly modular and flexible manner.
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*
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* The library is free for all purposes without any express
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* guarantee it works.
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*/
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#include "tomcrypt.h"
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/**
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@file der_encode_utctime.c
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ASN.1 DER, encode a UTCTIME, Tom St Denis
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*/
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#ifdef LTC_DER
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static const char * const baseten = "0123456789";
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#define STORE_V(y) \
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out[x++] = der_ia5_char_encode(baseten[(y/10) % 10]); \
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out[x++] = der_ia5_char_encode(baseten[y % 10]);
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/**
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Encodes a UTC time structure in DER format
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@param utctime The UTC time structure to encode
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@param out The destination of the DER encoding of the UTC time structure
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@param outlen [in/out] The length of the DER encoding
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@return CRYPT_OK if successful
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*/
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int der_encode_utctime(ltc_utctime *utctime,
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unsigned char *out, unsigned long *outlen)
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{
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unsigned long x, tmplen;
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int err;
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LTC_ARGCHK(utctime != NULL);
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LTC_ARGCHK(out != NULL);
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LTC_ARGCHK(outlen != NULL);
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if ((err = der_length_utctime(utctime, &tmplen)) != CRYPT_OK) {
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return err;
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}
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if (tmplen > *outlen) {
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*outlen = tmplen;
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return CRYPT_BUFFER_OVERFLOW;
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}
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/* store header */
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out[0] = 0x17;
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/* store values */
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x = 2;
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STORE_V(utctime->YY);
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STORE_V(utctime->MM);
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STORE_V(utctime->DD);
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STORE_V(utctime->hh);
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STORE_V(utctime->mm);
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STORE_V(utctime->ss);
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if (utctime->off_mm || utctime->off_hh) {
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out[x++] = der_ia5_char_encode(utctime->off_dir ? '-' : '+');
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STORE_V(utctime->off_hh);
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STORE_V(utctime->off_mm);
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} else {
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out[x++] = der_ia5_char_encode('Z');
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}
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/* store length */
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out[1] = (unsigned char)(x - 2);
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/* all good let's return */
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*outlen = x;
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return CRYPT_OK;
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}
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#endif
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/* ref: HEAD -> master, tag: v1.18.2 */
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/* git commit: 7e7eb695d581782f04b24dc444cbfde86af59853 */
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/* commit time: 2018-07-01 22:49:01 +0200 */
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44
thirdparty/libtomcrypt/pk/asn1/der/utctime/der_length_utctime.c
vendored
Normal file
44
thirdparty/libtomcrypt/pk/asn1/der/utctime/der_length_utctime.c
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@ -0,0 +1,44 @@
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/* LibTomCrypt, modular cryptographic library -- Tom St Denis
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*
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* LibTomCrypt is a library that provides various cryptographic
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* algorithms in a highly modular and flexible manner.
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*
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* The library is free for all purposes without any express
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* guarantee it works.
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*/
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#include "tomcrypt.h"
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/**
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@file der_length_utctime.c
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ASN.1 DER, get length of UTCTIME, Tom St Denis
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*/
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#ifdef LTC_DER
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/**
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Gets length of DER encoding of UTCTIME
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@param utctime The UTC time structure to get the size of
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@param outlen [out] The length of the DER encoding
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@return CRYPT_OK if successful
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*/
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int der_length_utctime(ltc_utctime *utctime, unsigned long *outlen)
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{
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LTC_ARGCHK(outlen != NULL);
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LTC_ARGCHK(utctime != NULL);
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if (utctime->off_hh == 0 && utctime->off_mm == 0) {
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/* we encode as YYMMDDhhmmssZ */
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*outlen = 2 + 13;
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} else {
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/* we encode as YYMMDDhhmmss{+|-}hh'mm' */
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*outlen = 2 + 17;
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}
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return CRYPT_OK;
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}
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#endif
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/* ref: HEAD -> master, tag: v1.18.2 */
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/* git commit: 7e7eb695d581782f04b24dc444cbfde86af59853 */
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/* commit time: 2018-07-01 22:49:01 +0200 */
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