mirror of
https://github.com/DarkStore-3DS/Project_CTR.git
synced 2026-07-03 08:49:03 +00:00
applestash
c7c2c3f73e
Moved away from ctrtool's polarssl api completely. Brought certs.c/h inline with code style, fixed bugs relating to tmd savedata field generation and not recording savedata size from rsf (ncsd.c)
113 lines
2.3 KiB
C
113 lines
2.3 KiB
C
#include "lib.h"
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#include "certs.h"
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// Cert Sizes
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void GetCertSigSectionSizes(u32 *sign_size, u32 *sign_padlen, u8 *cert)
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{
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u32 sig = u8_to_u32(cert,BE);
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switch(sig){
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case RSA_4096_SHA1 :
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*sign_size = 0x200;
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*sign_padlen = 0x3C;
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break;
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case RSA_2048_SHA1 :
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*sign_size = 0x100;
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*sign_padlen = 0x3C;
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break;
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case ECC_SHA1 :
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*sign_size = 0x3C;
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*sign_padlen = 0x40;
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break;
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case RSA_4096_SHA256 :
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*sign_size = 0x200;
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*sign_padlen = 0x3C;
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break;
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case RSA_2048_SHA256 :
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*sign_size = 0x100;
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*sign_padlen = 0x3C;
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break;
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case ECC_SHA256 :
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*sign_size = 0x3C;
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*sign_padlen = 0x40;
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break;
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default :
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*sign_size = 0;
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*sign_padlen = 0;
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break;
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}
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return;
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}
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u32 GetCertSize(u8 *cert)
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{
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u32 sign_size = 0;
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u32 sign_padlen = 0;
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GetCertSigSectionSizes(&sign_size,&sign_padlen,cert);
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if(!sign_size || !sign_padlen)
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return 0;
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return sizeof(u32) + sign_size + sign_padlen + sizeof(cert_hdr) + GetCertPubkSectionSize(GetCertPubkType(cert));
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}
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cert_hdr* GetCertHdr(u8 *cert)
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{
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u32 sign_size = 0;
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u32 sign_padlen = 0;
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GetCertSigSectionSizes(&sign_size,&sign_padlen,cert);
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if(!sign_size || !sign_padlen) return NULL;
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return (cert_hdr*)(cert+4+sign_size+sign_padlen);
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}
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u32 GetCertPubkSectionSize(pubk_types type)
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{
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switch(type){
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case RSA_4096_PUBK : return sizeof(rsa_4096_pubk_struct);
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case RSA_2048_PUBK : return sizeof(rsa_2048_pubk_struct);
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case ECC_PUBK : return sizeof(ecc_pubk_struct);
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default : return 0;
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}
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}
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// Issuer/Name Functions
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u8 *GetCertIssuer(u8 *cert)
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{
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cert_hdr *hdr = GetCertHdr(cert);
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return hdr->issuer;
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}
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u8 *GetCertName(u8 *cert)
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{
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cert_hdr *hdr = GetCertHdr(cert);
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return hdr->name;
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}
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void GenCertChildIssuer(u8 *dest, u8 *cert)
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{
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snprintf((char*)dest,0x40,"%s-%s",GetCertIssuer(cert),GetCertName(cert));
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}
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// Pubk
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pubk_types GetCertPubkType(u8 *cert)
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{
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cert_hdr *hdr = GetCertHdr(cert);
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return (pubk_types)u8_to_u32(hdr->keyType,BE);
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}
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u8 *GetCertPubk(u8 *cert)
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{
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if(!GetCertHdr(cert))
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return NULL;
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return ((u8*)GetCertHdr(cert)) + sizeof(cert_hdr);
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}
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bool VerifyCert(u8 *cert, u8 *pubk)
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{
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if(!GetCertHdr(cert))
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return false;
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u8 *signature = (cert+sizeof(u32));
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u8 *data = (u8*)GetCertHdr(cert);
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u32 datasize = sizeof(cert_hdr) + GetCertPubkSectionSize(GetCertPubkType(cert));
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return RsaSignVerify(data,datasize,signature,pubk,NULL,u8_to_u32(cert,BE),CTR_RSA_VERIFY);
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} |