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| 133 | .\" ======================================================================== |
| 134 | .\" |
| 135 | .IX Title "ASN1_generate_nconf 3" |
| 136 | .TH ASN1_generate_nconf 3 "2015-07-09" "1.0.1p" "OpenSSL" |
| 137 | .\" For nroff, turn off justification. Always turn off hyphenation; it makes |
| 138 | .\" way too many mistakes in technical documents. |
| 139 | .if n .ad l |
| 140 | .nh |
| 141 | .SH "NAME" |
| 142 | ASN1_generate_nconf, ASN1_generate_v3 \- ASN1 generation functions |
| 143 | .SH "SYNOPSIS" |
| 144 | .IX Header "SYNOPSIS" |
| 145 | .Vb 1 |
| 146 | \& #include <openssl/asn1.h> |
| 147 | \& |
| 148 | \& ASN1_TYPE *ASN1_generate_nconf(char *str, CONF *nconf); |
| 149 | \& ASN1_TYPE *ASN1_generate_v3(char *str, X509V3_CTX *cnf); |
| 150 | .Ve |
| 151 | .SH "DESCRIPTION" |
| 152 | .IX Header "DESCRIPTION" |
| 153 | These functions generate the \s-1ASN1\s0 encoding of a string |
| 154 | in an \fB\s-1ASN1_TYPE\s0\fR structure. |
| 155 | .PP |
| 156 | \&\fBstr\fR contains the string to encode \fBnconf\fR or \fBcnf\fR contains |
| 157 | the optional configuration information where additional strings |
| 158 | will be read from. \fBnconf\fR will typically come from a config |
| 159 | file wherease \fBcnf\fR is obtained from an \fBX509V3_CTX\fR structure |
| 160 | which will typically be used by X509 v3 certificate extension |
| 161 | functions. \fBcnf\fR or \fBnconf\fR can be set to \fB\s-1NULL\s0\fR if no additional |
| 162 | configuration will be used. |
| 163 | .SH "GENERATION STRING FORMAT" |
| 164 | .IX Header "GENERATION STRING FORMAT" |
| 165 | The actual data encoded is determined by the string \fBstr\fR and |
| 166 | the configuration information. The general format of the string |
| 167 | is: |
| 168 | .IP "\fB[modifier,]type[:value]\fR" 2 |
| 169 | .IX Item "[modifier,]type[:value]" |
| 170 | .PP |
| 171 | That is zero or more comma separated modifiers followed by a type |
| 172 | followed by an optional colon and a value. The formats of \fBtype\fR, |
| 173 | \&\fBvalue\fR and \fBmodifier\fR are explained below. |
| 174 | .SS "\s-1SUPPORTED TYPES\s0" |
| 175 | .IX Subsection "SUPPORTED TYPES" |
| 176 | The supported types are listed below. Unless otherwise specified |
| 177 | only the \fB\s-1ASCII\s0\fR format is permissible. |
| 178 | .IP "\fB\s-1BOOLEAN\s0\fR, \fB\s-1BOOL\s0\fR" 2 |
| 179 | .IX Item "BOOLEAN, BOOL" |
| 180 | This encodes a boolean type. The \fBvalue\fR string is mandatory and |
| 181 | should be \fB\s-1TRUE\s0\fR or \fB\s-1FALSE\s0\fR. Additionally \fB\s-1TRUE\s0\fR, \fBtrue\fR, \fBY\fR, |
| 182 | \&\fBy\fR, \fB\s-1YES\s0\fR, \fByes\fR, \fB\s-1FALSE\s0\fR, \fBfalse\fR, \fBN\fR, \fBn\fR, \fB\s-1NO\s0\fR and \fBno\fR |
| 183 | are acceptable. |
| 184 | .IP "\fB\s-1NULL\s0\fR" 2 |
| 185 | .IX Item "NULL" |
| 186 | Encode the \fB\s-1NULL\s0\fR type, the \fBvalue\fR string must not be present. |
| 187 | .IP "\fB\s-1INTEGER\s0\fR, \fB\s-1INT\s0\fR" 2 |
| 188 | .IX Item "INTEGER, INT" |
| 189 | Encodes an \s-1ASN1 \s0\fB\s-1INTEGER\s0\fR type. The \fBvalue\fR string represents |
| 190 | the value of the integer, it can be prefaced by a minus sign and |
| 191 | is normally interpreted as a decimal value unless the prefix \fB0x\fR |
| 192 | is included. |
| 193 | .IP "\fB\s-1ENUMERATED\s0\fR, \fB\s-1ENUM\s0\fR" 2 |
| 194 | .IX Item "ENUMERATED, ENUM" |
| 195 | Encodes the \s-1ASN1 \s0\fB\s-1ENUMERATED\s0\fR type, it is otherwise identical to |
| 196 | \&\fB\s-1INTEGER\s0\fR. |
| 197 | .IP "\fB\s-1OBJECT\s0\fR, \fB\s-1OID\s0\fR" 2 |
| 198 | .IX Item "OBJECT, OID" |
| 199 | Encodes an \s-1ASN1 \s0\fB\s-1OBJECT IDENTIFIER\s0\fR, the \fBvalue\fR string can be |
| 200 | a short name, a long name or numerical format. |
| 201 | .IP "\fB\s-1UTCTIME\s0\fR, \fB\s-1UTC\s0\fR" 2 |
| 202 | .IX Item "UTCTIME, UTC" |
| 203 | Encodes an \s-1ASN1 \s0\fBUTCTime\fR structure, the value should be in |
| 204 | the format \fB\s-1YYMMDDHHMMSSZ\s0\fR. |
| 205 | .IP "\fB\s-1GENERALIZEDTIME\s0\fR, \fB\s-1GENTIME\s0\fR" 2 |
| 206 | .IX Item "GENERALIZEDTIME, GENTIME" |
| 207 | Encodes an \s-1ASN1 \s0\fBGeneralizedTime\fR structure, the value should be in |
| 208 | the format \fB\s-1YYYYMMDDHHMMSSZ\s0\fR. |
| 209 | .IP "\fB\s-1OCTETSTRING\s0\fR, \fB\s-1OCT\s0\fR" 2 |
| 210 | .IX Item "OCTETSTRING, OCT" |
| 211 | Encodes an \s-1ASN1 \s0\fB\s-1OCTET STRING\s0\fR. \fBvalue\fR represents the contents |
| 212 | of this structure, the format strings \fB\s-1ASCII\s0\fR and \fB\s-1HEX\s0\fR can be |
| 213 | used to specify the format of \fBvalue\fR. |
| 214 | .IP "\fB\s-1BITSTRING\s0\fR, \fB\s-1BITSTR\s0\fR" 2 |
| 215 | .IX Item "BITSTRING, BITSTR" |
| 216 | Encodes an \s-1ASN1 \s0\fB\s-1BIT STRING\s0\fR. \fBvalue\fR represents the contents |
| 217 | of this structure, the format strings \fB\s-1ASCII\s0\fR, \fB\s-1HEX\s0\fR and \fB\s-1BITLIST\s0\fR |
| 218 | can be used to specify the format of \fBvalue\fR. |
| 219 | .Sp |
| 220 | If the format is anything other than \fB\s-1BITLIST\s0\fR the number of unused |
| 221 | bits is set to zero. |
| 222 | .IP "\fB\s-1UNIVERSALSTRING\s0\fR, \fB\s-1UNIV\s0\fR, \fB\s-1IA5\s0\fR, \fB\s-1IA5STRING\s0\fR, \fB\s-1UTF8\s0\fR, \fBUTF8String\fR, \fB\s-1BMP\s0\fR, \fB\s-1BMPSTRING\s0\fR, \fB\s-1VISIBLESTRING\s0\fR, \fB\s-1VISIBLE\s0\fR, \fB\s-1PRINTABLESTRING\s0\fR, \fB\s-1PRINTABLE\s0\fR, \fBT61\fR, \fBT61STRING\fR, \fB\s-1TELETEXSTRING\s0\fR, \fBGeneralString\fR, \fB\s-1NUMERICSTRING\s0\fR, \fB\s-1NUMERIC\s0\fR" 2 |
| 223 | .IX Item "UNIVERSALSTRING, UNIV, IA5, IA5STRING, UTF8, UTF8String, BMP, BMPSTRING, VISIBLESTRING, VISIBLE, PRINTABLESTRING, PRINTABLE, T61, T61STRING, TELETEXSTRING, GeneralString, NUMERICSTRING, NUMERIC" |
| 224 | These encode the corresponding string types. \fBvalue\fR represents the |
| 225 | contents of this structure. The format can be \fB\s-1ASCII\s0\fR or \fB\s-1UTF8\s0\fR. |
| 226 | .IP "\fB\s-1SEQUENCE\s0\fR, \fB\s-1SEQ\s0\fR, \fB\s-1SET\s0\fR" 2 |
| 227 | .IX Item "SEQUENCE, SEQ, SET" |
| 228 | Formats the result as an \s-1ASN1 \s0\fB\s-1SEQUENCE\s0\fR or \fB\s-1SET\s0\fR type. \fBvalue\fR |
| 229 | should be a section name which will contain the contents. The |
| 230 | field names in the section are ignored and the values are in the |
| 231 | generated string format. If \fBvalue\fR is absent then an empty \s-1SEQUENCE\s0 |
| 232 | will be encoded. |
| 233 | .SS "\s-1MODIFIERS\s0" |
| 234 | .IX Subsection "MODIFIERS" |
| 235 | Modifiers affect the following structure, they can be used to |
| 236 | add \s-1EXPLICIT\s0 or \s-1IMPLICIT\s0 tagging, add wrappers or to change |
| 237 | the string format of the final type and value. The supported |
| 238 | formats are documented below. |
| 239 | .IP "\fB\s-1EXPLICIT\s0\fR, \fB\s-1EXP\s0\fR" 2 |
| 240 | .IX Item "EXPLICIT, EXP" |
| 241 | Add an explicit tag to the following structure. This string |
| 242 | should be followed by a colon and the tag value to use as a |
| 243 | decimal value. |
| 244 | .Sp |
| 245 | By following the number with \fBU\fR, \fBA\fR, \fBP\fR or \fBC\fR \s-1UNIVERSAL, |
| 246 | APPLICATION, PRIVATE\s0 or \s-1CONTEXT SPECIFIC\s0 tagging can be used, |
| 247 | the default is \s-1CONTEXT SPECIFIC.\s0 |
| 248 | .IP "\fB\s-1IMPLICIT\s0\fR, \fB\s-1IMP\s0\fR" 2 |
| 249 | .IX Item "IMPLICIT, IMP" |
| 250 | This is the same as \fB\s-1EXPLICIT\s0\fR except \s-1IMPLICIT\s0 tagging is used |
| 251 | instead. |
| 252 | .IP "\fB\s-1OCTWRAP\s0\fR, \fB\s-1SEQWRAP\s0\fR, \fB\s-1SETWRAP\s0\fR, \fB\s-1BITWRAP\s0\fR" 2 |
| 253 | .IX Item "OCTWRAP, SEQWRAP, SETWRAP, BITWRAP" |
| 254 | The following structure is surrounded by an \s-1OCTET STRING,\s0 a \s-1SEQUENCE,\s0 |
| 255 | a \s-1SET\s0 or a \s-1BIT STRING\s0 respectively. For a \s-1BIT STRING\s0 the number of unused |
| 256 | bits is set to zero. |
| 257 | .IP "\fB\s-1FORMAT\s0\fR" 2 |
| 258 | .IX Item "FORMAT" |
| 259 | This specifies the format of the ultimate value. It should be followed |
| 260 | by a colon and one of the strings \fB\s-1ASCII\s0\fR, \fB\s-1UTF8\s0\fR, \fB\s-1HEX\s0\fR or \fB\s-1BITLIST\s0\fR. |
| 261 | .Sp |
| 262 | If no format specifier is included then \fB\s-1ASCII\s0\fR is used. If \fB\s-1UTF8\s0\fR is |
| 263 | specified then the value string must be a valid \fB\s-1UTF8\s0\fR string. For \fB\s-1HEX\s0\fR the |
| 264 | output must be a set of hex digits. \fB\s-1BITLIST\s0\fR (which is only valid for a \s-1BIT |
| 265 | STRING\s0) is a comma separated list of the indices of the set bits, all other |
| 266 | bits are zero. |
| 267 | .SH "EXAMPLES" |
| 268 | .IX Header "EXAMPLES" |
| 269 | A simple IA5String: |
| 270 | .PP |
| 271 | .Vb 1 |
| 272 | \& IA5STRING:Hello World |
| 273 | .Ve |
| 274 | .PP |
| 275 | An IA5String explicitly tagged: |
| 276 | .PP |
| 277 | .Vb 1 |
| 278 | \& EXPLICIT:0,IA5STRING:Hello World |
| 279 | .Ve |
| 280 | .PP |
| 281 | An IA5String explicitly tagged using \s-1APPLICATION\s0 tagging: |
| 282 | .PP |
| 283 | .Vb 1 |
| 284 | \& EXPLICIT:0A,IA5STRING:Hello World |
| 285 | .Ve |
| 286 | .PP |
| 287 | A \s-1BITSTRING\s0 with bits 1 and 5 set and all others zero: |
| 288 | .PP |
| 289 | .Vb 1 |
| 290 | \& FORMAT:BITLIST,BITSTRING:1,5 |
| 291 | .Ve |
| 292 | .PP |
| 293 | A more complex example using a config file to produce a |
| 294 | \&\s-1SEQUENCE\s0 consiting of a \s-1BOOL\s0 an \s-1OID\s0 and a UTF8String: |
| 295 | .PP |
| 296 | .Vb 1 |
| 297 | \& asn1 = SEQUENCE:seq_section |
| 298 | \& |
| 299 | \& [seq_section] |
| 300 | \& |
| 301 | \& field1 = BOOLEAN:TRUE |
| 302 | \& field2 = OID:commonName |
| 303 | \& field3 = UTF8:Third field |
| 304 | .Ve |
| 305 | .PP |
| 306 | This example produces an RSAPrivateKey structure, this is the |
| 307 | key contained in the file client.pem in all OpenSSL distributions |
| 308 | (note: the field names such as 'coeff' are ignored and are present just |
| 309 | for clarity): |
| 310 | .PP |
| 311 | .Vb 3 |
| 312 | \& asn1=SEQUENCE:private_key |
| 313 | \& [private_key] |
| 314 | \& version=INTEGER:0 |
| 315 | \& |
| 316 | \& n=INTEGER:0xBB6FE79432CC6EA2D8F970675A5A87BFBE1AFF0BE63E879F2AFFB93644\e |
| 317 | \& D4D2C6D000430DEC66ABF47829E74B8C5108623A1C0EE8BE217B3AD8D36D5EB4FCA1D9 |
| 318 | \& |
| 319 | \& e=INTEGER:0x010001 |
| 320 | \& |
| 321 | \& d=INTEGER:0x6F05EAD2F27FFAEC84BEC360C4B928FD5F3A9865D0FCAAD291E2A52F4A\e |
| 322 | \& F810DC6373278C006A0ABBA27DC8C63BF97F7E666E27C5284D7D3B1FFFE16B7A87B51D |
| 323 | \& |
| 324 | \& p=INTEGER:0xF3929B9435608F8A22C208D86795271D54EBDFB09DDEF539AB083DA912\e |
| 325 | \& D4BD57 |
| 326 | \& |
| 327 | \& q=INTEGER:0xC50016F89DFF2561347ED1186A46E150E28BF2D0F539A1594BBD7FE467\e |
| 328 | \& 46EC4F |
| 329 | \& |
| 330 | \& exp1=INTEGER:0x9E7D4326C924AFC1DEA40B45650134966D6F9DFA3A7F9D698CD4ABEA\e |
| 331 | \& 9C0A39B9 |
| 332 | \& |
| 333 | \& exp2=INTEGER:0xBA84003BB95355AFB7C50DF140C60513D0BA51D637272E355E397779\e |
| 334 | \& E7B2458F |
| 335 | \& |
| 336 | \& coeff=INTEGER:0x30B9E4F2AFA5AC679F920FC83F1F2DF1BAF1779CF989447FABC2F5\e |
| 337 | \& 628657053A |
| 338 | .Ve |
| 339 | .PP |
| 340 | This example is the corresponding public key in a SubjectPublicKeyInfo |
| 341 | structure: |
| 342 | .PP |
| 343 | .Vb 2 |
| 344 | \& # Start with a SEQUENCE |
| 345 | \& asn1=SEQUENCE:pubkeyinfo |
| 346 | \& |
| 347 | \& # pubkeyinfo contains an algorithm identifier and the public key wrapped |
| 348 | \& # in a BIT STRING |
| 349 | \& [pubkeyinfo] |
| 350 | \& algorithm=SEQUENCE:rsa_alg |
| 351 | \& pubkey=BITWRAP,SEQUENCE:rsapubkey |
| 352 | \& |
| 353 | \& # algorithm ID for RSA is just an OID and a NULL |
| 354 | \& [rsa_alg] |
| 355 | \& algorithm=OID:rsaEncryption |
| 356 | \& parameter=NULL |
| 357 | \& |
| 358 | \& # Actual public key: modulus and exponent |
| 359 | \& [rsapubkey] |
| 360 | \& n=INTEGER:0xBB6FE79432CC6EA2D8F970675A5A87BFBE1AFF0BE63E879F2AFFB93644\e |
| 361 | \& D4D2C6D000430DEC66ABF47829E74B8C5108623A1C0EE8BE217B3AD8D36D5EB4FCA1D9 |
| 362 | \& |
| 363 | \& e=INTEGER:0x010001 |
| 364 | .Ve |
| 365 | .SH "RETURN VALUES" |
| 366 | .IX Header "RETURN VALUES" |
| 367 | \&\fIASN1_generate_nconf()\fR and \fIASN1_generate_v3()\fR return the encoded |
| 368 | data as an \fB\s-1ASN1_TYPE\s0\fR structure or \fB\s-1NULL\s0\fR if an error occurred. |
| 369 | .PP |
| 370 | The error codes that can be obtained by \fIERR_get_error\fR\|(3). |
| 371 | .SH "SEE ALSO" |
| 372 | .IX Header "SEE ALSO" |
| 373 | \&\fIERR_get_error\fR\|(3) |
| 374 | .SH "HISTORY" |
| 375 | .IX Header "HISTORY" |
| 376 | \&\fIASN1_generate_nconf()\fR and \fIASN1_generate_v3()\fR were added to OpenSSL 0.9.8 |