I have been trying to generate S/MIME certificates for my MacOS and iOS devices and it does not seem to work. I have researched on this matter and it seems that keyUsage and extendedKeyUsage are. Using AES-256-CBC with openssl and nodejs with or whiout salt - aes-256-cbc.md.

C Openssl Generate Aes 256 Keyboard
C Openssl Generate Aes 256 Key Detection

Google have recently announced that they are going to start reporting that SSL certificates that are signed with a SHA-1 Hash will be treated as having a lower security than those signed with newer.
In EVPEncryptUpdate, you have to move the inbuf pointer along across each input byte, and you have to move the outbuf pointer along to fresh memory. I made minor changes to your code (and completed it enough to run): #include #include openssl/ssl.h #define BUFSIZE 256 int doit (char. text, char. key, char. iv) int outlen, inlen.
Openssl genrsa -out private.pem -aes256 2048. Openssl rsa -in private.pem -pubout -out public.pem. KEY=`openssl rand -base64 30`.

BASICS

Checking version
openssl version -aHow fast it runs on the system using four CPU cores and testing RSA algorithm
openssl speed -multi 4 rsaGet basic help
openssl helpGenerate 20 random bytes and show them on screen
openssl rand -hex 20

ENCODING / DECODING

Encoding a file using Base64
openssl base64 -in file.dataEncoding some text using Base64
echo -n 'some text' | openssl base64Base64 decode a file with output to another file
openssl base64 -d -in encoded.data -out decoded.data

WORKING WITH HASHES

List digest algorithms available
openssl list -digest-algorithmsHash a file using SHA256
openssl dgst -sha256 file.dataHash a file using SHA256 with its output in binary form (no output hex encoding)
No ASCII or encoded characters will be printed out to the console, just pure bytes. You can append ' | xxd'
openssl dgst -binary -sha256 file.dataHash text using SHA3-512
echo -n 'some text' | openssl dgst -sha3-512 Aes 256 software

Create HMAC - SHA384 of a file using a specific key in bytes
openssl dgst -SHA384 -mac HMAC -macopt hexkey:369bd7d655 file.dataCreate HMAC - SHA512 of some text
echo -n 'some text' | openssl dgst -mac HMAC -macopt hexkey:369bd7d655 -sha512 Aes-256 encryption

ASYMMETRIC ENCRYPTION

List elliptic curves available
openssl ecparam -list_curvesCreate 4096 bits RSA public-private key pair
openssl genrsa -out pub_priv.key 4096Display detailed private key information
openssl rsa -text -in pub_priv.key -nooutEncrypt public-private key pair using AES-256 algorithm
openssl rsa -in pub_priv.key -out encrypted.key -aes256Remove keys file encryption and save them to another file
openssl rsa -in encrypted.key -out cleartext.keyCopy the public key of the public-private key pair file to another file
openssl rsa -in pub_priv.key -pubout -out pubkey.keyEncrypt a file using RSA public key
openssl rsautl -encrypt -inkey pubkey.key -pubin -in cleartext.file -out ciphertext.fileDecrypt a file using RSA private key
openssl rsautl -decrypt -inkey pub_priv.key -in ciphertext.file -out decrypted.fileCreate private key using the P-224 elliptic curve
openssl ecparam -name secp224k1 -genkey -out ecpriv.keyEncrypt private key using 3DES algorithm
openssl ec -in ecP384priv.key -des3 -out ecP384priv_enc.key

SYMMETRIC ENCRYPTION

List all supported symmetric encryption ciphers
openssl enc -listEncrypt a file using an ASCII encoded password provided and AES-128-ECB algorithm
openssl enc -aes-128-ecb -in cleartext.file -out ciphertext.file -pass pass:thisisthepasswordDecrypt a file using AES-256-CBC and a keyfile
openssl enc -d -aes-256-cbc -in ciphertext.file -out cleartext.file -pass file:./key.fileEncrypt a file using a specific encryption key (K) provided as hex digits
openssl enc -aes-128-ecb -in cleartext.file -out ciphertext.file -K 1881807b2d1b3d22f14e9ec52563d981 -nosaltEncrypt a file using ARIA 256 in CBC block cipher mode using a specified encryption key (K:256 bits) and initialization vector (iv:128 bits)
openssl enc -aria-256-cbc -in cleartext.file -out ciphertext.file -K f92d2e986b7a2a01683b4c40d0cbcf6feaa669ef2bb5ec3a25ce85d9548291c1 -iv 470bc29762496046882b61ecee68e07c -nosaltEncrypt a file using Camellia 192 algorithm in COUNTER block cipher mode with key and iv provided
openssl enc -camellia-192-ctr -in cleartext.file -out ciphertext.file -K 6c7a1b3487d28d3bf444186d7c529b48d67dd6206c7a1b34 -iv 470bc29762496046882b61ecee68e07c

DIGITAL SIGNATURES

Generate DSA parameters for the private key. 2048 bits length
openssl dsaparam -out dsaparam.pem 2048Generate DSA public-private key for signing documents and protect it using AES128 algorithm Aes-256 encryption

openssl gendsa -out dsaprivatekey.pem -aes-128-cbc dsaparam.pemCopy the public key of the DSA public-private key file to another file
openssl dsa -in dsaprivatekey.pem -pubout -out dsapublickey.pemTo print out the contents of a DSA key pair file
openssl dsa -in dsaprivatekey.pem -text -nooutSigning the sha-256 hash of a file using RSA private key
openssl dgst -sha256 -sign rsakey.key -out signature.data document.pdfVerify a SHA-256 file signature using a public key
openssl dgst -sha256 -verify publickey.pem -signature signature.data original.fileSigning the sha3-512 hash of a file using DSA private key
openssl pkeyutl -sign -pkeyopt digest:sha3-512 -in document.docx -inkey dsaprivatekey.pem -out signature.dataVerify DSA signature
openssl pkeyutl -verify -sigfile dsasignature.data -inkey dsakey.pem -in document.docxCreate a private key using P-384 Elliptic Curve
openssl ecparam -name secp384r1 -genkey -out ecP384priv.keyEncrypt private key using 3DES algorithm
openssl ec -in ecP384priv.key -des3 -out ecP384priv_enc.keySign a PDF file using Elliptic Curves with the generated key
openssl pkeyutl -sign -inkey ecP384priv_enc.key -pkeyopt digest:sha3-512 -in document.pdf -out signature.dataVerify the file's signature. If it's ok you must receive 'Signature Verified Successfully'
C Openssl Generate Aes 256 Key

openssl pkeyutl -verify -in document.pdf -sigfile signature.data -inkey ecP384priv_enc.key

DIGITAL CERTIFICATES

Generating a CSR file and a 4096 bits RSA key pair
openssl req -newkey rsa:4096 -keyout private.key -out request.csrDisplay Certificate Signing Request ( CSR ) content
openssl req -text -noout -in request.csrDisplay the public key contained in the CSR file
openssl req -pubkey -noout -in request.csrCreating a Certificate Signing Request ( CSR ) using an existing private key. This can be useful when you need to renew the public digital certificate without changing the private key.
openssl req -new -key private.key -out request.csrCreate EC P384 curve parameters file to generate a CSR using Elliptic Curves in the next step.
openssl genpkey -genparam -algorithm EC -out EC_params.pem -pkeyopt ec_paramgen_curve:secp384r1 -pkeyopt ec_param_enc:named_curveCreate a CSR file using Elliptic Curve P384 parameters file created in the previous step. Instead of using RSA keys.
openssl req -newkey ec:EC_params.pem -keyout EC_P384_priv.key -out EC_request.csrCreate a self-signed certificate, a new 2048 bits RSA key pair with one year of validity
openssl req -newkey rsa:2048 -nodes -keyout priv.key -x509 -days 365 -out cert.crt