diff options
Diffstat (limited to 'crypto/userspace/libtomcrypt/pk/asn1/der/utf8')
3 files changed, 299 insertions, 0 deletions
diff --git a/crypto/userspace/libtomcrypt/pk/asn1/der/utf8/der_decode_utf8_string.c b/crypto/userspace/libtomcrypt/pk/asn1/der/utf8/der_decode_utf8_string.c new file mode 100644 index 00000000000..9df7e2315c1 --- /dev/null +++ b/crypto/userspace/libtomcrypt/pk/asn1/der/utf8/der_decode_utf8_string.c @@ -0,0 +1,111 @@ +/* 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://libtom.org + */ +#include "tomcrypt.h" + +/** + @file der_decode_utf8_string.c + ASN.1 DER, encode a UTF8 STRING, Tom St Denis +*/ + + +#ifdef LTC_DER + +/** + Store a UTF8 STRING + @param in The DER encoded UTF8 STRING + @param inlen The size of the DER UTF8 STRING + @param out [out] The array of utf8s stored (one per char) + @param outlen [in/out] The number of utf8s stored + @return CRYPT_OK if successful +*/ +int der_decode_utf8_string(const unsigned char *in, unsigned long inlen, + wchar_t *out, unsigned long *outlen) +{ + wchar_t tmp; + unsigned long x, y, z, len; + + LTC_ARGCHK(in != NULL); + LTC_ARGCHK(out != NULL); + LTC_ARGCHK(outlen != NULL); + + /* must have header at least */ + if (inlen < 2) { + return CRYPT_INVALID_PACKET; + } + + /* check for 0x0C */ + if ((in[0] & 0x1F) != 0x0C) { + return CRYPT_INVALID_PACKET; + } + x = 1; + + /* decode the length */ + if (in[x] & 0x80) { + /* valid # of bytes in length are 1,2,3 */ + y = in[x] & 0x7F; + if ((y == 0) || (y > 3) || ((x + y) > inlen)) { + return CRYPT_INVALID_PACKET; + } + + /* read the length in */ + len = 0; + ++x; + while (y--) { + len = (len << 8) | in[x++]; + } + } else { + len = in[x++] & 0x7F; + } + + if (len + x > inlen) { + return CRYPT_INVALID_PACKET; + } + + /* proceed to decode */ + for (y = 0; x < inlen; ) { + /* get first byte */ + tmp = in[x++]; + + /* count number of bytes */ + for (z = 0; (tmp & 0x80) && (z <= 4); z++, tmp = (tmp << 1) & 0xFF); + + if (z > 4 || (x + (z - 1) > inlen)) { + return CRYPT_INVALID_PACKET; + } + + /* decode, grab upper bits */ + tmp >>= z; + + /* grab remaining bytes */ + if (z > 1) { --z; } + while (z-- != 0) { + if ((in[x] & 0xC0) != 0x80) { + return CRYPT_INVALID_PACKET; + } + tmp = (tmp << 6) | ((wchar_t)in[x++] & 0x3F); + } + + if (y > *outlen) { + *outlen = y; + return CRYPT_BUFFER_OVERFLOW; + } + out[y++] = tmp; + } + *outlen = y; + + return CRYPT_OK; +} + +#endif + +/* $Source: /cvs/libtom/libtomcrypt/src/pk/asn1/der/utf8/der_decode_utf8_string.c,v $ */ +/* $Revision: 1.8 $ */ +/* $Date: 2006/12/28 01:27:24 $ */ diff --git a/crypto/userspace/libtomcrypt/pk/asn1/der/utf8/der_encode_utf8_string.c b/crypto/userspace/libtomcrypt/pk/asn1/der/utf8/der_encode_utf8_string.c new file mode 100644 index 00000000000..d1efb09c7b4 --- /dev/null +++ b/crypto/userspace/libtomcrypt/pk/asn1/der/utf8/der_encode_utf8_string.c @@ -0,0 +1,105 @@ +/* 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://libtom.org + */ +#include "tomcrypt.h" + +/** + @file der_encode_utf8_string.c + ASN.1 DER, encode a UTF8 STRING, Tom St Denis +*/ + + +#ifdef LTC_DER + +/** + Store an UTF8 STRING + @param in The array of UTF8 to store (one per wchar_t) + @param inlen The number of UTF8 to store + @param out [out] The destination for the DER encoded UTF8 STRING + @param outlen [in/out] The max size and resulting size of the DER UTF8 STRING + @return CRYPT_OK if successful +*/ +int der_encode_utf8_string(const wchar_t *in, unsigned long inlen, + unsigned char *out, unsigned long *outlen) +{ + unsigned long x, y, len; + + LTC_ARGCHK(in != NULL); + LTC_ARGCHK(out != NULL); + LTC_ARGCHK(outlen != NULL); + + /* get the size */ + for (x = len = 0; x < inlen; x++) { + if (in[x] < 0 || in[x] > 0x1FFFF) { + return CRYPT_INVALID_ARG; + } + len += der_utf8_charsize(in[x]); + } + + if (len < 128) { + y = 2 + len; + } else if (len < 256) { + y = 3 + len; + } else if (len < 65536UL) { + y = 4 + len; + } else if (len < 16777216UL) { + y = 5 + len; + } else { + return CRYPT_INVALID_ARG; + } + + /* too big? */ + if (y > *outlen) { + *outlen = len; + return CRYPT_BUFFER_OVERFLOW; + } + + /* encode the header+len */ + x = 0; + out[x++] = 0x0C; + if (len < 128) { + out[x++] = (unsigned char)len; + } else if (len < 256) { + out[x++] = 0x81; + out[x++] = (unsigned char)len; + } else if (len < 65536UL) { + out[x++] = 0x82; + out[x++] = (unsigned char)((len>>8)&255); + out[x++] = (unsigned char)(len&255); + } else if (len < 16777216UL) { + out[x++] = 0x83; + out[x++] = (unsigned char)((len>>16)&255); + out[x++] = (unsigned char)((len>>8)&255); + out[x++] = (unsigned char)(len&255); + } else { + return CRYPT_INVALID_ARG; + } + + /* store UTF8 */ + for (y = 0; y < inlen; y++) { + switch (der_utf8_charsize(in[y])) { + case 1: out[x++] = (unsigned char)in[y]; break; + case 2: out[x++] = 0xC0 | ((in[y] >> 6) & 0x1F); out[x++] = 0x80 | (in[y] & 0x3F); break; + case 3: out[x++] = 0xE0 | ((in[y] >> 12) & 0x0F); out[x++] = 0x80 | ((in[y] >> 6) & 0x3F); out[x++] = 0x80 | (in[y] & 0x3F); break; + case 4: out[x++] = 0xF0 | ((in[y] >> 18) & 0x07); out[x++] = 0x80 | ((in[y] >> 12) & 0x3F); out[x++] = 0x80 | ((in[y] >> 6) & 0x3F); out[x++] = 0x80 | (in[y] & 0x3F); break; + } + } + + /* retun length */ + *outlen = x; + + return CRYPT_OK; +} + +#endif + +/* $Source: /cvs/libtom/libtomcrypt/src/pk/asn1/der/utf8/der_encode_utf8_string.c,v $ */ +/* $Revision: 1.9 $ */ +/* $Date: 2006/12/28 01:27:24 $ */ diff --git a/crypto/userspace/libtomcrypt/pk/asn1/der/utf8/der_length_utf8_string.c b/crypto/userspace/libtomcrypt/pk/asn1/der/utf8/der_length_utf8_string.c new file mode 100644 index 00000000000..920bd003fe5 --- /dev/null +++ b/crypto/userspace/libtomcrypt/pk/asn1/der/utf8/der_length_utf8_string.c @@ -0,0 +1,83 @@ +/* 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://libtom.org + */ +#include "tomcrypt.h" + +/** + @file der_length_utf8_string.c + ASN.1 DER, get length of UTF8 STRING, Tom St Denis +*/ + +#ifdef LTC_DER + +/** Return the size in bytes of a UTF-8 character + @param c The UTF-8 character to measure + @return The size in bytes +*/ +unsigned long der_utf8_charsize(const wchar_t c) +{ + if (c <= 0x7F) { + return 1; + } else if (c <= 0x7FF) { + return 2; + } else if (c <= 0xFFFF) { + return 3; + } else { + return 4; + } +} + +/** + Gets length of DER encoding of UTF8 STRING + @param in The characters to measure the length of + @param noctets The number of octets in the string to encode + @param outlen [out] The length of the DER encoding for the given string + @return CRYPT_OK if successful +*/ +int der_length_utf8_string(const wchar_t *in, unsigned long noctets, unsigned long *outlen) +{ + unsigned long x, len; + + LTC_ARGCHK(in != NULL); + LTC_ARGCHK(outlen != NULL); + + len = 0; + for (x = 0; x < noctets; x++) { + if (in[x] < 0 || in[x] > 0x10FFFF) { + return CRYPT_INVALID_ARG; + } + len += der_utf8_charsize(in[x]); + } + + if (len < 128) { + /* 0C LL DD DD DD ... */ + *outlen = 2 + len; + } else if (len < 256) { + /* 0C 81 LL DD DD DD ... */ + *outlen = 3 + len; + } else if (len < 65536UL) { + /* 0C 82 LL LL DD DD DD ... */ + *outlen = 4 + len; + } else if (len < 16777216UL) { + /* 0C 83 LL LL LL DD DD DD ... */ + *outlen = 5 + len; + } else { + return CRYPT_INVALID_ARG; + } + + return CRYPT_OK; +} + +#endif + + +/* $Source: /cvs/libtom/libtomcrypt/src/pk/asn1/der/utf8/der_length_utf8_string.c,v $ */ +/* $Revision: 1.6 $ */ +/* $Date: 2006/12/28 01:27:24 $ */ |