X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fasn1%2Fa_utf8.c;h=508e11e527c8c4b2b4bc84e872f453c58c179073;hp=2657abae41df16c890ae812eef63fc5e76a10b28;hb=19f7e5e24a9fa2e9c0472c846416c6d186b2f5d4;hpb=d77b3054cd87c2b13fa0169931f74b8e0dac5252 diff --git a/crypto/asn1/a_utf8.c b/crypto/asn1/a_utf8.c index 2657abae41..508e11e527 100644 --- a/crypto/asn1/a_utf8.c +++ b/crypto/asn1/a_utf8.c @@ -58,33 +58,154 @@ #include #include "cryptlib.h" -#include "asn1.h" +#include -/* ASN1err(ASN1_F_D2I_ASN1_UTF8STRING,ERR_R_MALLOC_FAILURE); + +/* UTF8 utilities */ + +/* This parses a UTF8 string one character at a time. It is passed a pointer + * to the string and the length of the string. It sets 'value' to the value of + * the current character. It returns the number of characters read or a + * negative error code: + * -1 = string too short + * -2 = illegal character + * -3 = subsequent characters not of the form 10xxxxxx + * -4 = character encoded incorrectly (not minimal length). */ -int i2d_ASN1_UTF8STRING(a, pp) -ASN1_UTF8STRING *a; -unsigned char **pp; - { - return(i2d_ASN1_bytes((ASN1_STRING *)a,pp, - V_ASN1_UTF8STRING,V_ASN1_UNIVERSAL)); - } +int UTF8_getc(const unsigned char *str, int len, unsigned long *val) +{ + const unsigned char *p; + unsigned long value; + int ret; + if(len <= 0) return 0; + p = str; -ASN1_UTF8STRING *d2i_ASN1_UTF8STRING(a, pp, length) -ASN1_UTF8STRING **a; -unsigned char **pp; -long length; - { - ASN1_UTF8STRING *ret=NULL; + /* Check syntax and work out the encoded value (if correct) */ + if((*p & 0x80) == 0) { + value = *p++ & 0x7f; + ret = 1; + } else if((*p & 0xe0) == 0xc0) { + if(len < 2) return -1; + if((p[1] & 0xc0) != 0x80) return -3; + value = (*p++ & 0x1f) << 6; + value |= *p++ & 0x3f; + if(value < 0x80) return -4; + ret = 2; + } else if((*p & 0xf0) == 0xe0) { + if(len < 3) return -1; + if( ((p[1] & 0xc0) != 0x80) + || ((p[2] & 0xc0) != 0x80) ) return -3; + value = (*p++ & 0xf) << 12; + value |= (*p++ & 0x3f) << 6; + value |= *p++ & 0x3f; + if(value < 0x800) return -4; + ret = 3; + } else if((*p & 0xf8) == 0xf0) { + if(len < 4) return -1; + if( ((p[1] & 0xc0) != 0x80) + || ((p[2] & 0xc0) != 0x80) + || ((p[3] & 0xc0) != 0x80) ) return -3; + value = ((unsigned long)(*p++ & 0x7)) << 18; + value |= (*p++ & 0x3f) << 12; + value |= (*p++ & 0x3f) << 6; + value |= *p++ & 0x3f; + if(value < 0x10000) return -4; + ret = 4; + } else if((*p & 0xfc) == 0xf8) { + if(len < 5) return -1; + if( ((p[1] & 0xc0) != 0x80) + || ((p[2] & 0xc0) != 0x80) + || ((p[3] & 0xc0) != 0x80) + || ((p[4] & 0xc0) != 0x80) ) return -3; + value = ((unsigned long)(*p++ & 0x3)) << 24; + value |= ((unsigned long)(*p++ & 0x3f)) << 18; + value |= ((unsigned long)(*p++ & 0x3f)) << 12; + value |= (*p++ & 0x3f) << 6; + value |= *p++ & 0x3f; + if(value < 0x200000) return -4; + ret = 5; + } else if((*p & 0xfe) == 0xfc) { + if(len < 6) return -1; + if( ((p[1] & 0xc0) != 0x80) + || ((p[2] & 0xc0) != 0x80) + || ((p[3] & 0xc0) != 0x80) + || ((p[4] & 0xc0) != 0x80) + || ((p[5] & 0xc0) != 0x80) ) return -3; + value = ((unsigned long)(*p++ & 0x1)) << 30; + value |= ((unsigned long)(*p++ & 0x3f)) << 24; + value |= ((unsigned long)(*p++ & 0x3f)) << 18; + value |= ((unsigned long)(*p++ & 0x3f)) << 12; + value |= (*p++ & 0x3f) << 6; + value |= *p++ & 0x3f; + if(value < 0x4000000) return -4; + ret = 6; + } else return -2; + *val = value; + return ret; +} - ret=(ASN1_UTF8STRING *)d2i_ASN1_bytes((ASN1_STRING **)a, - pp,length,V_ASN1_UTF8STRING,V_ASN1_UNIVERSAL); - if (ret == NULL) - { - ASN1err(ASN1_F_D2I_ASN1_UTF8STRING,ERR_R_NESTED_ASN1_ERROR); - return(NULL); +/* This takes a character 'value' and writes the UTF8 encoded value in + * 'str' where 'str' is a buffer containing 'len' characters. Returns + * the number of characters written or -1 if 'len' is too small. 'str' can + * be set to NULL in which case it just returns the number of characters. + * It will need at most 6 characters. + */ + +int UTF8_putc(unsigned char *str, int len, unsigned long value) +{ + if(!str) len = 6; /* Maximum we will need */ + else if(len <= 0) return -1; + if(value < 0x80) { + if(str) *str = (unsigned char)value; + return 1; + } + if(value < 0x800) { + if(len < 2) return -1; + if(str) { + *str++ = (unsigned char)(((value >> 6) & 0x1f) | 0xc0); + *str = (unsigned char)((value & 0x3f) | 0x80); } - return(ret); + return 2; } - + if(value < 0x10000) { + if(len < 3) return -1; + if(str) { + *str++ = (unsigned char)(((value >> 12) & 0xf) | 0xe0); + *str++ = (unsigned char)(((value >> 6) & 0x3f) | 0x80); + *str = (unsigned char)((value & 0x3f) | 0x80); + } + return 3; + } + if(value < 0x200000) { + if(len < 4) return -1; + if(str) { + *str++ = (unsigned char)(((value >> 18) & 0x7) | 0xf0); + *str++ = (unsigned char)(((value >> 12) & 0x3f) | 0x80); + *str++ = (unsigned char)(((value >> 6) & 0x3f) | 0x80); + *str = (unsigned char)((value & 0x3f) | 0x80); + } + return 4; + } + if(value < 0x4000000) { + if(len < 5) return -1; + if(str) { + *str++ = (unsigned char)(((value >> 24) & 0x3) | 0xf8); + *str++ = (unsigned char)(((value >> 18) & 0x3f) | 0x80); + *str++ = (unsigned char)(((value >> 12) & 0x3f) | 0x80); + *str++ = (unsigned char)(((value >> 6) & 0x3f) | 0x80); + *str = (unsigned char)((value & 0x3f) | 0x80); + } + return 5; + } + if(len < 6) return -1; + if(str) { + *str++ = (unsigned char)(((value >> 30) & 0x1) | 0xfc); + *str++ = (unsigned char)(((value >> 24) & 0x3f) | 0x80); + *str++ = (unsigned char)(((value >> 18) & 0x3f) | 0x80); + *str++ = (unsigned char)(((value >> 12) & 0x3f) | 0x80); + *str++ = (unsigned char)(((value >> 6) & 0x3f) | 0x80); + *str = (unsigned char)((value & 0x3f) | 0x80); + } + return 6; +}