Example code for rsakeygen, pubkey, sign and verify - #4
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ghost
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Sep 27, 2019
| while( (opt=getopt(argc, argv, "o:s:h")) != -1) { | ||
| switch(opt) { | ||
| case 's': | ||
| rsabits = atoi(optarg); |
| case 'h': | ||
| usage(); | ||
| goto end; | ||
| break; |
| break; | ||
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| case 'o': | ||
| if((prtkeyfile = (char *) OPENSSL_malloc(strlen(optarg)+1)) == NULL) { |
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Why global variable prtkeyfile, just pass this as argument to generate_rsa().
| } | ||
| } | ||
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| bio_log = BIO_new_fp(stdout, BIO_NOCLOSE); |
| end: | ||
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| if(prtkeyfile) { | ||
| OPENSSL_free(prtkeyfile); |
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When you don't use prtkeyfile as global we don't need this.
| } | ||
| } | ||
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| if (!PEM_write_bio_PrivateKey(prtbio, pkey, NULL, NULL, 0, NULL, NULL)) { |
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Output pem can be RSAPrivateKey(pkcs1?) or PrivateKey(pkcs8). The above one writes the key in pkcs8, what is our intention here whether to have pkcs1 or pkcs8, do you want to take an option from the user?.
| if (bn) { | ||
| BN_free(bn); | ||
| } | ||
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| @@ -0,0 +1,13 @@ | |||
| all: | |||
| gcc genrsa.c -L/opt/openssl/lib -lcrypto -o genrsa | |||
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Why /opt/openssl/lib, we have to remove this. And change make file to use Makefile constructs to compiles all c files at ones instead of compiling them individually.
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| clean: | ||
| rm genrsa -rf |
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| char *prtkeyfile=NULL; | ||
| BIO *bio_log=NULL; | ||
| unsigned int rsabits = 2048; |
ghost
reviewed
Sep 27, 2019
| @@ -0,0 +1,13 @@ | |||
| all: | |||
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Example code for rsakeygen, pubkey, sign and verify