Section 3 of the manual describes all library functions excluding the library functions (system call wrappers) described in Section 2, which implement system calls.

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BIO_vsnprintf
BIO_printf, BIO_vprintf, BIO_snprintf, BIO_vsnprintf - formatted output to a BIO
BIO_wait
BIO_socket_wait, BIO_wait, BIO_do_connect_retry - BIO connection utility functions
BIO_wpending
BIO control operations
BIO_write
BIO_read_ex, BIO_write_ex, BIO_read, BIO_write, BIO_gets, BIO_get_line, BIO_puts - BIO I/O functions
BIO_write_ex
BIO_read_ex, BIO_write_ex, BIO_read, BIO_write, BIO_gets, BIO_get_line, BIO_puts - BIO I/O functions
BIO_write_filename
BIO_s_file, BIO_new_file, BIO_new_fp, BIO_set_fp, BIO_get_fp, BIO_read_filename, BIO_write_filename, BIO_append_filename, BIO_rw_filename - FILE bio
BITMAP
Stores the contents of a bitmap. Allegro game programming library
BN_BLINDING_convert
blinding related BIGNUM functions
BN_BLINDING_convert_ex
blinding related BIGNUM functions
BN_BLINDING_create_param
blinding related BIGNUM functions
BN_BLINDING_free
blinding related BIGNUM functions
BN_BLINDING_get_flags
blinding related BIGNUM functions
BN_BLINDING_invert
blinding related BIGNUM functions
BN_BLINDING_invert_ex
blinding related BIGNUM functions
BN_BLINDING_is_current_thread
blinding related BIGNUM functions
BN_BLINDING_lock
blinding related BIGNUM functions
BN_BLINDING_new
blinding related BIGNUM functions
BN_BLINDING_set_current_thread
blinding related BIGNUM functions
BN_BLINDING_set_flags
blinding related BIGNUM functions
BN_BLINDING_unlock
blinding related BIGNUM functions
BN_BLINDING_update
blinding related BIGNUM functions
BN_CTX_end
BN_CTX_start, BN_CTX_get, BN_CTX_end - use temporary BIGNUM variables
BN_CTX_free
BN_CTX_new_ex, BN_CTX_new, BN_CTX_secure_new_ex, BN_CTX_secure_new, BN_CTX_free - allocate and free BN_CTX structures
BN_CTX_get
BN_CTX_start, BN_CTX_get, BN_CTX_end - use temporary BIGNUM variables
BN_CTX_new
BN_CTX_new_ex, BN_CTX_new, BN_CTX_secure_new_ex, BN_CTX_secure_new, BN_CTX_free - allocate and free BN_CTX structures
BN_CTX_new_ex
BN_CTX_new_ex, BN_CTX_new, BN_CTX_secure_new_ex, BN_CTX_secure_new, BN_CTX_free - allocate and free BN_CTX structures
BN_CTX_secure_new
BN_CTX_new_ex, BN_CTX_new, BN_CTX_secure_new_ex, BN_CTX_secure_new, BN_CTX_free - allocate and free BN_CTX structures
BN_CTX_secure_new_ex
BN_CTX_new_ex, BN_CTX_new, BN_CTX_secure_new_ex, BN_CTX_secure_new, BN_CTX_free - allocate and free BN_CTX structures
BN_CTX_start
BN_CTX_start, BN_CTX_get, BN_CTX_end - use temporary BIGNUM variables
BN_GENCB_call
generate primes and test for primality
BN_GENCB_free
generate primes and test for primality
BN_GENCB_get_arg
generate primes and test for primality
BN_GENCB_new
generate primes and test for primality
BN_GENCB_set
generate primes and test for primality
BN_GENCB_set_old
generate primes and test for primality
BN_MONT_CTX_copy
BN_mod_mul_montgomery, BN_MONT_CTX_new, BN_MONT_CTX_free, BN_MONT_CTX_set, BN_MONT_CTX_copy, BN_from_montgomery, BN_to_montgomery - Montgomery multiplication
BN_MONT_CTX_free
BN_mod_mul_montgomery, BN_MONT_CTX_new, BN_MONT_CTX_free, BN_MONT_CTX_set, BN_MONT_CTX_copy, BN_from_montgomery, BN_to_montgomery - Montgomery multiplication
BN_MONT_CTX_new
BN_mod_mul_montgomery, BN_MONT_CTX_new, BN_MONT_CTX_free, BN_MONT_CTX_set, BN_MONT_CTX_copy, BN_from_montgomery, BN_to_montgomery - Montgomery multiplication
BN_MONT_CTX_set
BN_mod_mul_montgomery, BN_MONT_CTX_new, BN_MONT_CTX_free, BN_MONT_CTX_set, BN_MONT_CTX_copy, BN_from_montgomery, BN_to_montgomery - Montgomery multiplication
BN_RECP_CTX_free
BN_mod_mul_reciprocal, BN_div_recp, BN_RECP_CTX_new, BN_RECP_CTX_free, BN_RECP_CTX_set - modular multiplication using reciprocal
BN_RECP_CTX_new
BN_mod_mul_reciprocal, BN_div_recp, BN_RECP_CTX_new, BN_RECP_CTX_free, BN_RECP_CTX_set - modular multiplication using reciprocal
BN_RECP_CTX_set
BN_mod_mul_reciprocal, BN_div_recp, BN_RECP_CTX_new, BN_RECP_CTX_free, BN_RECP_CTX_set - modular multiplication using reciprocal
BN_abs_is_word
BN_cmp, BN_ucmp, BN_is_zero, BN_is_one, BN_is_word, BN_abs_is_word, BN_is_odd - BIGNUM comparison and test functions
BN_add
BN_add, BN_sub, BN_mul, BN_sqr, BN_div, BN_mod, BN_nnmod, BN_mod_add, BN_mod_sub, BN_mod_mul, BN_mod_sqr, BN_mod_sqrt, BN_exp, BN_mod_exp, BN_gcd - arithmetic operations on BIGNUMs
BN_add_word
BN_add_word, BN_sub_word, BN_mul_word, BN_div_word, BN_mod_word - arithmetic functions on BIGNUMs with integers
BN_bin2bn
BN_bn2binpad, BN_bn2bin, BN_bin2bn, BN_bn2lebinpad, BN_lebin2bn, BN_bn2nativepad, BN_native2bn, BN_bn2hex, BN_bn2dec, BN_hex2bn, BN_dec2bn, BN_print, BN_print_fp, BN_bn2mpi, BN_mpi2bn - format conversions
BN_bn2bin
BN_bn2binpad, BN_bn2bin, BN_bin2bn, BN_bn2lebinpad, BN_lebin2bn, BN_bn2nativepad, BN_native2bn, BN_bn2hex, BN_bn2dec, BN_hex2bn, BN_dec2bn, BN_print, BN_print_fp, BN_bn2mpi, BN_mpi2bn - format conversions
BN_bn2binpad
BN_bn2binpad, BN_bn2bin, BN_bin2bn, BN_bn2lebinpad, BN_lebin2bn, BN_bn2nativepad, BN_native2bn, BN_bn2hex, BN_bn2dec, BN_hex2bn, BN_dec2bn, BN_print, BN_print_fp, BN_bn2mpi, BN_mpi2bn - format conversions
BN_bn2dec
BN_bn2binpad, BN_bn2bin, BN_bin2bn, BN_bn2lebinpad, BN_lebin2bn, BN_bn2nativepad, BN_native2bn, BN_bn2hex, BN_bn2dec, BN_hex2bn, BN_dec2bn, BN_print, BN_print_fp, BN_bn2mpi, BN_mpi2bn - format conversions
BN_bn2hex
BN_bn2binpad, BN_bn2bin, BN_bin2bn, BN_bn2lebinpad, BN_lebin2bn, BN_bn2nativepad, BN_native2bn, BN_bn2hex, BN_bn2dec, BN_hex2bn, BN_dec2bn, BN_print, BN_print_fp, BN_bn2mpi, BN_mpi2bn - format conversions
BN_bn2lebinpad
BN_bn2binpad, BN_bn2bin, BN_bin2bn, BN_bn2lebinpad, BN_lebin2bn, BN_bn2nativepad, BN_native2bn, BN_bn2hex, BN_bn2dec, BN_hex2bn, BN_dec2bn, BN_print, BN_print_fp, BN_bn2mpi, BN_mpi2bn - format conversions
BN_bn2mpi
BN_bn2binpad, BN_bn2bin, BN_bin2bn, BN_bn2lebinpad, BN_lebin2bn, BN_bn2nativepad, BN_native2bn, BN_bn2hex, BN_bn2dec, BN_hex2bn, BN_dec2bn, BN_print, BN_print_fp, BN_bn2mpi, BN_mpi2bn - format conversions
BN_bn2nativepad
BN_bn2binpad, BN_bn2bin, BN_bin2bn, BN_bn2lebinpad, BN_lebin2bn, BN_bn2nativepad, BN_native2bn, BN_bn2hex, BN_bn2dec, BN_hex2bn, BN_dec2bn, BN_print, BN_print_fp, BN_bn2mpi, BN_mpi2bn - format conversions
BN_check_prime
generate primes and test for primality
BN_clear
BN_new, BN_secure_new, BN_clear, BN_free, BN_clear_free - allocate and free BIGNUMs
BN_clear_bit
BN_set_bit, BN_clear_bit, BN_is_bit_set, BN_mask_bits, BN_lshift, BN_lshift1, BN_rshift, BN_rshift1 - bit operations on BIGNUMs
BN_clear_free
BN_new, BN_secure_new, BN_clear, BN_free, BN_clear_free - allocate and free BIGNUMs
BN_cmp
BN_cmp, BN_ucmp, BN_is_zero, BN_is_one, BN_is_word, BN_abs_is_word, BN_is_odd - BIGNUM comparison and test functions
BN_copy
BN_copy, BN_dup, BN_with_flags - copy BIGNUMs
BN_dec2bn
BN_bn2binpad, BN_bn2bin, BN_bin2bn, BN_bn2lebinpad, BN_lebin2bn, BN_bn2nativepad, BN_native2bn, BN_bn2hex, BN_bn2dec, BN_hex2bn, BN_dec2bn, BN_print, BN_print_fp, BN_bn2mpi, BN_mpi2bn - format conversions
BN_div
BN_add, BN_sub, BN_mul, BN_sqr, BN_div, BN_mod, BN_nnmod, BN_mod_add, BN_mod_sub, BN_mod_mul, BN_mod_sqr, BN_mod_sqrt, BN_exp, BN_mod_exp, BN_gcd - arithmetic operations on BIGNUMs
BN_div_recp
BN_mod_mul_reciprocal, BN_div_recp, BN_RECP_CTX_new, BN_RECP_CTX_free, BN_RECP_CTX_set - modular multiplication using reciprocal
BN_div_word
BN_add_word, BN_sub_word, BN_mul_word, BN_div_word, BN_mod_word - arithmetic functions on BIGNUMs with integers
BN_dup
BN_copy, BN_dup, BN_with_flags - copy BIGNUMs
BN_exp
BN_add, BN_sub, BN_mul, BN_sqr, BN_div, BN_mod, BN_nnmod, BN_mod_add, BN_mod_sub, BN_mod_mul, BN_mod_sqr, BN_mod_sqrt, BN_exp, BN_mod_exp, BN_gcd - arithmetic operations on BIGNUMs
BN_free
BN_new, BN_secure_new, BN_clear, BN_free, BN_clear_free - allocate and free BIGNUMs
BN_from_montgomery
BN_mod_mul_montgomery, BN_MONT_CTX_new, BN_MONT_CTX_free, BN_MONT_CTX_set, BN_MONT_CTX_copy, BN_from_montgomery, BN_to_montgomery - Montgomery multiplication
BN_gcd
BN_add, BN_sub, BN_mul, BN_sqr, BN_div, BN_mod, BN_nnmod, BN_mod_add, BN_mod_sub, BN_mod_mul, BN_mod_sqr, BN_mod_sqrt, BN_exp, BN_mod_exp, BN_gcd - arithmetic operations on BIGNUMs
BN_generate_prime
generate primes and test for primality
BN_generate_prime_ex
generate primes and test for primality
BN_generate_prime_ex2
generate primes and test for primality
BN_get0_nist_prime_192
Create standardized public primes or DH pairs
BN_get0_nist_prime_224
Create standardized public primes or DH pairs
BN_get0_nist_prime_256
Create standardized public primes or DH pairs
BN_get0_nist_prime_384
Create standardized public primes or DH pairs
BN_get0_nist_prime_521
Create standardized public primes or DH pairs
BN_get_rfc2409_prime_1024
Create standardized public primes or DH pairs
BN_get_rfc2409_prime_768
Create standardized public primes or DH pairs
BN_get_rfc3526_prime_1536
Create standardized public primes or DH pairs
BN_get_rfc3526_prime_2048
Create standardized public primes or DH pairs
BN_get_rfc3526_prime_3072
Create standardized public primes or DH pairs
BN_get_rfc3526_prime_4096
Create standardized public primes or DH pairs
BN_get_rfc3526_prime_6144
Create standardized public primes or DH pairs
BN_get_rfc3526_prime_8192
Create standardized public primes or DH pairs
BN_get_word
BN_zero, BN_one, BN_value_one, BN_set_word, BN_get_word - BIGNUM assignment operations
BN_hex2bn
BN_bn2binpad, BN_bn2bin, BN_bin2bn, BN_bn2lebinpad, BN_lebin2bn, BN_bn2nativepad, BN_native2bn, BN_bn2hex, BN_bn2dec, BN_hex2bn, BN_dec2bn, BN_print, BN_print_fp, BN_bn2mpi, BN_mpi2bn - format conversions
BN_is_bit_set
BN_set_bit, BN_clear_bit, BN_is_bit_set, BN_mask_bits, BN_lshift, BN_lshift1, BN_rshift, BN_rshift1 - bit operations on BIGNUMs
BN_is_odd
BN_cmp, BN_ucmp, BN_is_zero, BN_is_one, BN_is_word, BN_abs_is_word, BN_is_odd - BIGNUM comparison and test functions
BN_is_one
BN_cmp, BN_ucmp, BN_is_zero, BN_is_one, BN_is_word, BN_abs_is_word, BN_is_odd - BIGNUM comparison and test functions
BN_is_prime
generate primes and test for primality
BN_is_prime_ex
generate primes and test for primality
BN_is_prime_fasttest
generate primes and test for primality
BN_is_prime_fasttest_ex
generate primes and test for primality
BN_is_word
BN_cmp, BN_ucmp, BN_is_zero, BN_is_one, BN_is_word, BN_abs_is_word, BN_is_odd - BIGNUM comparison and test functions
BN_is_zero
BN_cmp, BN_ucmp, BN_is_zero, BN_is_one, BN_is_word, BN_abs_is_word, BN_is_odd - BIGNUM comparison and test functions
BN_lebin2bn
BN_bn2binpad, BN_bn2bin, BN_bin2bn, BN_bn2lebinpad, BN_lebin2bn, BN_bn2nativepad, BN_native2bn, BN_bn2hex, BN_bn2dec, BN_hex2bn, BN_dec2bn, BN_print, BN_print_fp, BN_bn2mpi, BN_mpi2bn - format conversions
BN_lshift
BN_set_bit, BN_clear_bit, BN_is_bit_set, BN_mask_bits, BN_lshift, BN_lshift1, BN_rshift, BN_rshift1 - bit operations on BIGNUMs
BN_lshift1
BN_set_bit, BN_clear_bit, BN_is_bit_set, BN_mask_bits, BN_lshift, BN_lshift1, BN_rshift, BN_rshift1 - bit operations on BIGNUMs
BN_mask_bits
BN_set_bit, BN_clear_bit, BN_is_bit_set, BN_mask_bits, BN_lshift, BN_lshift1, BN_rshift, BN_rshift1 - bit operations on BIGNUMs
BN_mod
BN_add, BN_sub, BN_mul, BN_sqr, BN_div, BN_mod, BN_nnmod, BN_mod_add, BN_mod_sub, BN_mod_mul, BN_mod_sqr, BN_mod_sqrt, BN_exp, BN_mod_exp, BN_gcd - arithmetic operations on BIGNUMs