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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" OSSL_PARAM_BLD, OSSL_PARAM_BLD_new, OSSL_PARAM_BLD_to_param, OSSL_PARAM_BLD_free, OSSL_PARAM_BLD_push_int, OSSL_PARAM_BLD_push_uint, OSSL_PARAM_BLD_push_long, OSSL_PARAM_BLD_push_ulong, OSSL_PARAM_BLD_push_int32, OSSL_PARAM_BLD_push_uint32, OSSL_PARAM_BLD_push_int64, OSSL_PARAM_BLD_push_uint64, OSSL_PARAM_BLD_push_size_t, OSSL_PARAM_BLD_push_time_t, OSSL_PARAM_BLD_push_double, OSSL_PARAM_BLD_push_BN, OSSL_PARAM_BLD_push_BN_pad, OSSL_PARAM_BLD_push_utf8_string, OSSL_PARAM_BLD_push_utf8_ptr, OSSL_PARAM_BLD_push_octet_string, OSSL_PARAM_BLD_push_octet_ptr \&\- functions to assist in the creation of OSSL_PARAM arrays .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include \& \& typedef struct OSSL_PARAM_BLD; \& \& OSSL_PARAM_BLD *OSSL_PARAM_BLD_new(void); \& OSSL_PARAM *OSSL_PARAM_BLD_to_param(OSSL_PARAM_BLD *bld); \& void OSSL_PARAM_BLD_free(OSSL_PARAM_BLD *bld); \& \& int OSSL_PARAM_BLD_push_TYPE(OSSL_PARAM_BLD *bld, const char *key, TYPE val); \& \& int OSSL_PARAM_BLD_push_BN(OSSL_PARAM_BLD *bld, const char *key, \& const BIGNUM *bn); \& int OSSL_PARAM_BLD_push_BN_pad(OSSL_PARAM_BLD *bld, const char *key, \& const BIGNUM *bn, size_t sz); \& \& int OSSL_PARAM_BLD_push_utf8_string(OSSL_PARAM_BLD *bld, const char *key, \& const char *buf, size_t bsize); \& int OSSL_PARAM_BLD_push_utf8_ptr(OSSL_PARAM_BLD *bld, const char *key, \& char *buf, size_t bsize); \& int OSSL_PARAM_BLD_push_octet_string(OSSL_PARAM_BLD *bld, const char *key, \& const void *buf, size_t bsize); \& int OSSL_PARAM_BLD_push_octet_ptr(OSSL_PARAM_BLD *bld, const char *key, \& void *buf, size_t bsize); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" A collection of utility functions that simplify the creation of \s-1OSSL_PARAM\s0 arrays. The \fB\f(BI\s-1TYPE\s0\fB\fR names are as per \fBOSSL_PARAM_int\fR\|(3). .PP \&\fBOSSL_PARAM_BLD_new()\fR allocates and initialises a new \s-1OSSL_PARAM_BLD\s0 structure so that values can be added. Any existing values are cleared. .PP \&\fBOSSL_PARAM_BLD_free()\fR deallocates the memory allocates by \fBOSSL_PARAM_BLD_new()\fR. .PP \&\fBOSSL_PARAM_BLD_to_param()\fR converts a built up \s-1OSSL_PARAM_BLD\s0 structure \&\fIbld\fR into an allocated \s-1OSSL_PARAM\s0 array. The \s-1OSSL_PARAM\s0 array and all associated storage must be freed by calling \&\fBOSSL_PARAM_free()\fR with the functions return value. \&\fBOSSL_PARAM_BLD_free()\fR can safely be called any time after this function is. .PP \&\fBOSSL_PARAM_BLD_push_\f(BI\s-1TYPE\s0\fB\fR() are a series of functions which will create \&\s-1OSSL_PARAM\s0 objects of the specified size and correct type for the \fIval\fR argument. \&\fIval\fR is stored by value and an expression or auto variable can be used. .PP \&\fBOSSL_PARAM_BLD_push_BN()\fR is a function that will create an \s-1OSSL_PARAM\s0 object that holds the specified \s-1BIGNUM\s0 \fIbn\fR. If \fIbn\fR is marked as being securely allocated, its \s-1OSSL_PARAM\s0 representation will also be securely allocated. The \fIbn\fR argument is stored by reference and the underlying \s-1BIGNUM\s0 object must exist until after \fBOSSL_PARAM_BLD_to_param()\fR has been called. .PP \&\fBOSSL_PARAM_BLD_push_BN_pad()\fR is a function that will create an \s-1OSSL_PARAM\s0 object that holds the specified \s-1BIGNUM\s0 \fIbn\fR. The object will be padded to occupy exactly \fIsz\fR bytes, if insufficient space is specified an error results. If \fIbn\fR is marked as being securely allocated, its \s-1OSSL_PARAM\s0 representation will also be securely allocated. The \fIbn\fR argument is stored by reference and the underlying \s-1BIGNUM\s0 object must exist until after \fBOSSL_PARAM_BLD_to_param()\fR has been called. .PP \&\fBOSSL_PARAM_BLD_push_utf8_string()\fR is a function that will create an \s-1OSSL_PARAM\s0 object that references the \s-1UTF8\s0 string specified by \fIbuf\fR. The length of the string \fIbsize\fR should not include the terminating \s-1NUL\s0 byte. If it is zero then it will be calculated. The string that \fIbuf\fR points to is stored by reference and must remain in scope until after \fBOSSL_PARAM_BLD_to_param()\fR has been called. .PP \&\fBOSSL_PARAM_BLD_push_octet_string()\fR is a function that will create an \s-1OSSL_PARAM\s0 object that references the octet string specified by \fIbuf\fR and . The memory that \fIbuf\fR points to is stored by reference and must remain in scope until after \fBOSSL_PARAM_BLD_to_param()\fR has been called. .PP \&\fBOSSL_PARAM_BLD_push_utf8_ptr()\fR is a function that will create an \s-1OSSL_PARAM\s0 object that references the \s-1UTF8\s0 string specified by \fIbuf\fR. The length of the string \fIbsize\fR should not include the terminating \s-1NUL\s0 byte. If it is zero then it will be calculated. The string \fIbuf\fR points to is stored by reference and must remain in scope until the \s-1OSSL_PARAM\s0 array is freed. .PP \&\fBOSSL_PARAM_BLD_push_octet_ptr()\fR is a function that will create an \s-1OSSL_PARAM\s0 object that references the octet string specified by \fIbuf\fR. The memory \fIbuf\fR points to is stored by reference and must remain in scope until the \s-1OSSL_PARAM\s0 array is freed. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fBOSSL_PARAM_BLD_new()\fR returns the allocated \s-1OSSL_PARAM_BLD\s0 structure, or \s-1NULL\s0 on error. .PP \&\fBOSSL_PARAM_BLD_to_param()\fR returns the allocated \s-1OSSL_PARAM\s0 array, or \s-1NULL\s0 on error. .PP All of the OSSL_PARAM_BLD_push_TYPE functions return 1 on success and 0 on error. .SH "NOTES" .IX Header "NOTES" \&\fBOSSL_PARAM_BLD_push_BN()\fR and \fBOSSL_PARAM_BLD_push_BN_pad()\fR currently only support nonnegative \fB\s-1BIGNUM\s0\fRs. They return an error on negative \fB\s-1BIGNUM\s0\fRs. .SH "EXAMPLES" .IX Header "EXAMPLES" Both examples creating an \s-1OSSL_PARAM\s0 array that contains an \s-1RSA\s0 key. For both, the predefined key variables are: .PP .Vb 6 \& BIGNUM *n; /* modulus */ \& unsigned int e; /* public exponent */ \& BIGNUM *d; /* private exponent */ \& BIGNUM *p, *q; /* first two prime factors */ \& BIGNUM *dmp1, *dmq1; /* first two CRT exponents */ \& BIGNUM *iqmp; /* first CRT coefficient */ .Ve .SS "Example 1" .IX Subsection "Example 1" This example shows how to create an \s-1OSSL_PARAM\s0 array that contains an \s-1RSA\s0 private key. .PP .Vb 2 \& OSSL_PARAM_BLD *bld = OSSL_PARAM_BLD_new(); \& OSSL_PARAM *params = NULL; \& \& if (bld == NULL \& || !OSSL_PARAM_BLD_push_BN(bld, "n", n) \& || !OSSL_PARAM_BLD_push_uint(bld, "e", e) \& || !OSSL_PARAM_BLD_push_BN(bld, "d", d) \& || !OSSL_PARAM_BLD_push_BN(bld, "rsa\-factor1", p) \& || !OSSL_PARAM_BLD_push_BN(bld, "rsa\-factor2", q) \& || !OSSL_PARAM_BLD_push_BN(bld, "rsa\-exponent1", dmp1) \& || !OSSL_PARAM_BLD_push_BN(bld, "rsa\-exponent2", dmq1) \& || !OSSL_PARAM_BLD_push_BN(bld, "rsa\-coefficient1", iqmp) \& || (params = OSSL_PARAM_BLD_to_param(bld)) == NULL) \& goto err; \& OSSL_PARAM_BLD_free(bld); \& /* Use params */ \& ... \& OSSL_PARAM_free(params); .Ve .SS "Example 2" .IX Subsection "Example 2" This example shows how to create an \s-1OSSL_PARAM\s0 array that contains an \s-1RSA\s0 public key. .PP .Vb 2 \& OSSL_PARAM_BLD *bld = OSSL_PARAM_BLD_new(); \& OSSL_PARAM *params = NULL; \& \& if (nld == NULL \& || !OSSL_PARAM_BLD_push_BN(bld, "n", n) \& || !OSSL_PARAM_BLD_push_uint(bld, "e", e) \& || (params = OSSL_PARAM_BLD_to_param(bld)) == NULL) \& goto err; \& OSSL_PARAM_BLD_free(bld); \& /* Use params */ \& ... \& OSSL_PARAM_free(params); .Ve .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBOSSL_PARAM_int\fR\|(3), \s-1\fBOSSL_PARAM\s0\fR\|(3), \fBOSSL_PARAM_free\fR\|(3) .SH "HISTORY" .IX Header "HISTORY" The functions described here were all added in OpenSSL 3.0. .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2019\-2022 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at .